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- + \ No newline at end of file diff --git a/api/index.html b/api/index.html index 561e67ff..0d28800c 100644 --- a/api/index.html +++ b/api/index.html @@ -10,7 +10,7 @@ - + @@ -20,10 +20,10 @@ --list-all flags, the output will be a JSON object with the following structure:

{
  "tasks": [
    {
      "name": "",
      "desc": "",
      "summary": "",
      "up_to_date": false,
      "location": {
        "line": 54,
        "column": 3,
        "taskfile": "/path/to/Taskfile.yml"
      }
    }
    // ...
  ],
  "location": "/path/to/Taskfile.yml"
}

Special Variables​

There are some special variables that is available on the templating system:

VarDescription
CLI_ARGSContain all extra arguments passed after -- when calling Task through the CLI.
TASKThe name of the current task.
ROOT_DIRThe absolute path of the root Taskfile.
TASKFILE_DIRThe absolute path of the included Taskfile.
USER_WORKING_DIRThe absolute path of the directory task was called from.
CHECKSUMThe checksum of the files listed in sources. Only available within the status prop and if method is set to checksum.
TIMESTAMPThe date object of the greatest timestamp of the files listes in sources. Only available within the status prop and if method is set to timestamp.
TASK_VERSIONThe current version of task.

ENV​

Some environment variables can be overriden to adjust Task behavior.

ENVDefaultDescription
TASK_TEMP_DIR.taskLocation of the temp dir. Can relative to the project like tmp/task or absolute like /tmp/.task or ~/.task.
TASK_COLOR_RESET0Color used for white.
TASK_COLOR_BLUE34Color used for blue.
TASK_COLOR_GREEN32Color used for green.
TASK_COLOR_CYAN36Color used for cyan.
TASK_COLOR_YELLOW33Color used for yellow.
TASK_COLOR_MAGENTA35Color used for magenta.
TASK_COLOR_RED31Color used for red.
FORCE_COLORForce color output usage.

Taskfile Schema​

AttributeTypeDefaultDescription
versionstringVersion of the Taskfile. The current version is 3.
outputstringinterleavedOutput mode. Available options: interleaved, group and prefixed.
methodstringchecksumDefault method in this Taskfile. Can be overriden in a task by task basis. Available options: checksum, timestamp and none.
includesmap[string]IncludeAdditional Taskfiles to be included.
varsmap[string]VariableA set of global variables.
envmap[string]VariableA set of global environment variables.
tasksmap[string]TaskA set of task definitions.
silentboolfalseDefault 'silent' options for this Taskfile. If false, can be overidden with true in a task by task basis.
dotenv[]stringA list of .env file paths to be parsed.
runstringalwaysDefault 'run' option for this Taskfile. Available options: always, once and when_changed.
intervalstring5sSets a different watch interval when using --watch, the default being 5 seconds. This string should be a valid Go Duration.
set[]stringSpecify options for the set builtin.
shopt[]stringSpecify option for the shopt builtin.

Include​

AttributeTypeDefaultDescription
taskfilestringThe path for the Taskfile or directory to be included. If a directory, Task will look for files named Taskfile.yml or Taskfile.yaml inside that directory. If a relative path, resolved relative to the directory containing the including Taskfile.
dirstringThe parent Taskfile directoryThe working directory of the included tasks when run.
optionalboolfalseIf true, no errors will be thrown if the specified file does not exist.
internalboolfalseStops any task in the included Taskfile from being callable on the command line. These commands will also be omitted from the output when used with --list.
aliases[]stringAlternative names for the namespace of the included Taskfile.
varsmap[string]VariableA set of variables to apply to the included Taskfile.
info

Informing only a string like below is equivalent to setting that value to the taskfile attribute.

includes:
  foo: ./path

Variable​

AttributeTypeDefaultDescription
itselfstringA static value that will be set to the variable.
shstringA shell command. The output (STDOUT) will be assigned to the variable.
info

Static and dynamic variables have different syntaxes, like below:

vars:
  STATIC: static
  DYNAMIC:
    sh: echo "dynamic"

Task​

AttributeTypeDefaultDescription
cmds[]CommandA list of shell commands to be executed.
deps[]DependencyA list of dependencies of this task. Tasks defined here will run in parallel before this task.
labelstringOverrides the name of the task in the output when a task is run. Supports variables.
descstringA short description of the task. This is displayed when calling task --list.
summarystringA longer description of the task. This is displayed when calling task --summary [task].
aliases[]stringA list of alternative names by which the task can be called.
sources[]stringA list of sources to check before running this task. Relevant for checksum and timestamp methods. Can be file paths or star globs.
generates[]stringA list of files meant to be generated by this task. Relevant for timestamp method. Can be file paths or star globs.
status[]stringA list of commands to check if this task should run. The task is skipped otherwise. This overrides method, sources and generates.
preconditions[]PreconditionA list of commands to check if this task should run. If a condition is not met, the task will error.
dirstringThe directory in which this task should run. Defaults to the current working directory.
varsmap[string]VariableA set of variables that can be used in the task.
envmap[string]VariableA set of environment variables that will be made available to shell commands.
dotenv[]stringA list of .env file paths to be parsed.
silentboolfalseHides task name and command from output. The command's output will still be redirected to STDOUT and STDERR. When combined with the --list flag, task descriptions will be hidden.
interactiveboolfalseTells task that the command is interactive.
internalboolfalseStops a task from being callable on the command line. It will also be omitted from the output when used with --list.
methodstringchecksumDefines which method is used to check the task is up-to-date. timestamp will compare the timestamp of the sources and generates files. checksum will check the checksum (You probably want to ignore the .task folder in your .gitignore file). none skips any validation and always run the task.
prefixstringDefines a string to prefix the output of tasks running in parallel. Only used when the output mode is prefixed.
ignore_errorboolfalseContinue execution if errors happen while executing commands.
runstringThe one declared globally in the Taskfile or alwaysSpecifies whether the task should run again or not if called more than once. Available options: always, once and when_changed.
platforms[]stringAll platformsSpecifies which platforms the task should be run on. Valid GOOS and GOARCH values allowed. Task will be skipped otherwise.
set[]stringSpecify options for the set builtin.
shopt[]stringSpecify option for the shopt builtin.
info

These alternative syntaxes are available. They will set the given values to -cmds and everything else will be set to their default values:

tasks:
  foo: echo "foo"

  foobar:
    - echo "foo"
    - echo "bar"

  baz:
    cmd: echo "baz"

Command​

AttributeTypeDefaultDescription
cmdstringThe shell command to be executed.
silentboolfalseSkips some output for this command. Note that STDOUT and STDERR of the commands will still be redirected.
taskstringSet this to trigger execution of another task instead of running a command. This cannot be set together with cmd.
varsmap[string]VariableOptional additional variables to be passed to the referenced task. Only relevant when setting task instead of cmd.
ignore_errorboolfalseContinue execution if errors happen while executing the command.
deferstringAlternative to cmd, but schedules the command to be executed at the end of this task instead of immediately. This cannot be used together with cmd.
platforms[]stringAll platformsSpecifies which platforms the command should be run on. Valid GOOS and GOARCH values allowed. Command will be skipped otherwise.
set[]stringSpecify options for the set builtin.
shopt[]stringSpecify option for the shopt builtin.
info

If given as a a string, the value will be assigned to cmd:

tasks:
  foo:
    cmds:
      - echo "foo"
      - echo "bar"

Dependency​

AttributeTypeDefaultDescription
taskstringThe task to be execute as a dependency.
varsmap[string]VariableOptional additional variables to be passed to this task.
tip

If you don't want to set additional variables, it's enough to declare the +cmds and everything else will be set to their default values:

tasks:
  foo: echo "foo"

  foobar:
    - echo "foo"
    - echo "bar"

  baz:
    cmd: echo "baz"

Command​

AttributeTypeDefaultDescription
cmdstringThe shell command to be executed.
silentboolfalseSkips some output for this command. Note that STDOUT and STDERR of the commands will still be redirected.
taskstringSet this to trigger execution of another task instead of running a command. This cannot be set together with cmd.
varsmap[string]VariableOptional additional variables to be passed to the referenced task. Only relevant when setting task instead of cmd.
ignore_errorboolfalseContinue execution if errors happen while executing the command.
deferstringAlternative to cmd, but schedules the command to be executed at the end of this task instead of immediately. This cannot be used together with cmd.
platforms[]stringAll platformsSpecifies which platforms the command should be run on. Valid GOOS and GOARCH values allowed. Command will be skipped otherwise.
set[]stringSpecify options for the set builtin.
shopt[]stringSpecify option for the shopt builtin.
info

If given as a a string, the value will be assigned to cmd:

tasks:
  foo:
    cmds:
      - echo "foo"
      - echo "bar"

Dependency​

AttributeTypeDefaultDescription
taskstringThe task to be execute as a dependency.
varsmap[string]VariableOptional additional variables to be passed to this task.
silentboolfalseHides task name and command from output. The command's output will still be redirected to STDOUT and STDERR.
tip

If you don't want to set additional variables, it's enough to declare the dependency as a list of strings (they will be assigned to task):

tasks:
  foo:
    deps: [foo, bar]

Precondition​

AttributeTypeDefaultDescription
shstringCommand to be executed. If a non-zero exit code is returned, the task errors without executing its commands.
msgstringOptional message to print if the precondition isn't met.
tip

If you don't want to set a different message, you can declare a precondition like this and the value will be assigned to sh:

tasks:
  foo:
    precondition: test -f Taskfile.yml
- + \ No newline at end of file diff --git a/assets/js/6476eba6.e90c30d8.js b/assets/js/6476eba6.e90c30d8.js deleted file mode 100644 index 42312ffa..00000000 --- a/assets/js/6476eba6.e90c30d8.js +++ /dev/null @@ -1 +0,0 @@ -"use strict";(self.webpackChunktaskfile_dev=self.webpackChunktaskfile_dev||[]).push([[827],{3905:function(e,n,t){t.d(n,{Zo:function(){return d},kt:function(){return k}});var a=t(7294);function i(e,n,t){return n in e?Object.defineProperty(e,n,{value:t,enumerable:!0,configurable:!0,writable:!0}):e[n]=t,e}function l(e,n){var t=Object.keys(e);if(Object.getOwnPropertySymbols){var a=Object.getOwnPropertySymbols(e);n&&(a=a.filter((function(n){return Object.getOwnPropertyDescriptor(e,n).enumerable}))),t.push.apply(t,a)}return t}function s(e){for(var n=1;n=0||(i[t]=e[t]);return i}(e,n);if(Object.getOwnPropertySymbols){var l=Object.getOwnPropertySymbols(e);for(a=0;a=0||Object.prototype.propertyIsEnumerable.call(e,t)&&(i[t]=e[t])}return i}var r=a.createContext({}),p=function(e){var n=a.useContext(r),t=n;return e&&(t="function"==typeof e?e(n):s(s({},n),e)),t},d=function(e){var n=p(e.components);return a.createElement(r.Provider,{value:n},e.children)},u="mdxType",m={inlineCode:"code",wrapper:function(e){var n=e.children;return a.createElement(a.Fragment,{},n)}},c=a.forwardRef((function(e,n){var t=e.components,i=e.mdxType,l=e.originalType,r=e.parentName,d=o(e,["components","mdxType","originalType","parentName"]),u=p(t),c=i,k=u["".concat(r,".").concat(c)]||u[c]||m[c]||l;return t?a.createElement(k,s(s({ref:n},d),{},{components:t})):a.createElement(k,s({ref:n},d))}));function k(e,n){var t=arguments,i=n&&n.mdxType;if("string"==typeof e||i){var l=t.length,s=new Array(l);s[0]=c;var o={};for(var r in n)hasOwnProperty.call(n,r)&&(o[r]=n[r]);o.originalType=e,o[u]="string"==typeof e?e:i,s[1]=o;for(var p=2;pdefer",id:"doing-task-cleanup-with-defer",level:2},{value:"Go's template engine",id:"gos-template-engine",level:2},{value:"Help",id:"help",level:2},{value:"Display summary of task",id:"display-summary-of-task",level:2},{value:"Task aliases",id:"task-aliases",level:2},{value:"Overriding task name",id:"overriding-task-name",level:2},{value:"Silent mode",id:"silent-mode",level:2},{value:"Dry run mode",id:"dry-run-mode",level:2},{value:"Ignore errors",id:"ignore-errors",level:2},{value:"Output syntax",id:"output-syntax",level:2},{value:"Interactive CLI application",id:"interactive-cli-application",level:2},{value:"Short task syntax",id:"short-task-syntax",level:2},{value:"set and shopt",id:"set-and-shopt",level:2},{value:"Watch tasks",id:"watch-tasks",level:2}],d={toc:p};function u(e){let{components:n,...t}=e;return(0,i.kt)("wrapper",(0,a.Z)({},d,t,{components:n,mdxType:"MDXLayout"}),(0,i.kt)("h1",{id:"usage"},"Usage"),(0,i.kt)("h2",{id:"getting-started"},"Getting started"),(0,i.kt)("p",null,"Create a file called ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile.yml")," in the root of your project. The ",(0,i.kt)("inlineCode",{parentName:"p"},"cmds"),"\nattribute should contain the commands of a task. The example below allows\ncompiling a Go app and uses ",(0,i.kt)("a",{parentName:"p",href:"https://esbuild.github.io/"},"esbuild")," to concat and\nminify multiple CSS files into a single one."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - go build -v -i main.go\n\n assets:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"Running the tasks is as simple as running:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"task assets build\n")),(0,i.kt)("p",null,"Task uses ",(0,i.kt)("a",{parentName:"p",href:"https://mvdan.cc/sh/"},"mvdan.cc/sh"),", a native Go sh interpreter. So\nyou can write sh/bash commands, and it will work even on Windows, where ",(0,i.kt)("inlineCode",{parentName:"p"},"sh")," or\n",(0,i.kt)("inlineCode",{parentName:"p"},"bash")," are usually not available. Just remember any executable called must be\navailable by the OS or in PATH."),(0,i.kt)("p",null,'If you omit a task name, "default" will be assumed.'),(0,i.kt)("h2",{id:"supported-file-names"},"Supported file names"),(0,i.kt)("p",null,"Task will look for the following file names, in order of priority:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Taskfile.yml"),(0,i.kt)("li",{parentName:"ul"},"Taskfile.yaml"),(0,i.kt)("li",{parentName:"ul"},"Taskfile.dist.yml"),(0,i.kt)("li",{parentName:"ul"},"Taskfile.dist.yaml")),(0,i.kt)("p",null,"The intention of having the ",(0,i.kt)("inlineCode",{parentName:"p"},".dist")," variants is to allow projects to have one\ncommitted version (",(0,i.kt)("inlineCode",{parentName:"p"},".dist"),") while still allowing individual users to override\nthe Taskfile by adding an additional ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile.yml")," (which would be on\n",(0,i.kt)("inlineCode",{parentName:"p"},".gitignore"),")."),(0,i.kt)("h3",{id:"running-a-taskfile-from-a-subdirectory"},"Running a Taskfile from a subdirectory"),(0,i.kt)("p",null,"If a Taskfile cannot be found in the current working directory, it will walk up\nthe file tree until it finds one (similar to how ",(0,i.kt)("inlineCode",{parentName:"p"},"git")," works). When running Task\nfrom a subdirectory like this, it will behave as if you ran it from the\ndirectory containing the Taskfile."),(0,i.kt)("p",null,"You can use this functionality along with the special ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.USER_WORKING_DIR}}"),"\nvariable to create some very useful reusable tasks. For example, if you have a\nmonorepo with directories for each microservice, you can ",(0,i.kt)("inlineCode",{parentName:"p"},"cd")," into a\nmicroservice directory and run a task command to bring it up without having to\ncreate multiple tasks or Taskfiles with identical content. For example:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n up:\n dir: '{{.USER_WORKING_DIR}}'\n preconditions:\n - test -f docker-compose.yml\n cmds:\n - docker-compose up -d\n")),(0,i.kt)("p",null,"In this example, we can run ",(0,i.kt)("inlineCode",{parentName:"p"},"cd ")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"task up")," and as long as the\n",(0,i.kt)("inlineCode",{parentName:"p"},"")," directory contains a ",(0,i.kt)("inlineCode",{parentName:"p"},"docker-compose.yml"),", the Docker composition\nwill be brought up."),(0,i.kt)("h3",{id:"running-a-global-taskfile"},"Running a global Taskfile"),(0,i.kt)("p",null,"If you call Task with the ",(0,i.kt)("inlineCode",{parentName:"p"},"--global")," (alias ",(0,i.kt)("inlineCode",{parentName:"p"},"-g"),") flag, it will look for your\nhome directory instead of your working directory. In short, Task will look for a\nTaskfile on either ",(0,i.kt)("inlineCode",{parentName:"p"},"$HOME/Taskfile.yml")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"$HOME/Taskfile.yaml")," paths."),(0,i.kt)("p",null,"This is useful to have automation that you can run from anywhere in your system!"),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"When running your global Taskfile with ",(0,i.kt)("inlineCode",{parentName:"p"},"-g"),", tasks will run on ",(0,i.kt)("inlineCode",{parentName:"p"},"$HOME")," by\ndefault, and not on your working directory!"),(0,i.kt)("p",{parentName:"admonition"},"As mentioned in the previous section, the ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.USER_WORKING_DIR}}")," special\nvariable can be very handy here to run stuff on the directory you're calling\n",(0,i.kt)("inlineCode",{parentName:"p"},"task -g")," from."),(0,i.kt)("pre",{parentName:"admonition"},(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n from-home:\n cmds:\n - pwd\n\n from-working-directory:\n dir: '{{.USER_WORKING_DIR}}'\n cmds:\n - pwd\n"))),(0,i.kt)("h2",{id:"environment-variables"},"Environment variables"),(0,i.kt)("h3",{id:"task"},"Task"),(0,i.kt)("p",null,"You can use ",(0,i.kt)("inlineCode",{parentName:"p"},"env")," to set custom environment variables for a specific task:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n greet:\n cmds:\n - echo $GREETING\n env:\n GREETING: Hey, there!\n")),(0,i.kt)("p",null,"Additionally, you can set global environment variables that will be available to\nall tasks:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nenv:\n GREETING: Hey, there!\n\ntasks:\n greet:\n cmds:\n - echo $GREETING\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},(0,i.kt)("inlineCode",{parentName:"p"},"env")," supports expansion and retrieving output from a shell command just like\nvariables, as you can see in the ",(0,i.kt)("a",{parentName:"p",href:"#variables"},"Variables")," section.")),(0,i.kt)("h3",{id:"env-files"},".env files"),(0,i.kt)("p",null,"You can also ask Task to include ",(0,i.kt)("inlineCode",{parentName:"p"},".env")," like files by using the ",(0,i.kt)("inlineCode",{parentName:"p"},"dotenv:"),"\nsetting:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash",metastring:'title=".env"',title:'".env"'},"KEYNAME=VALUE\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash",metastring:'title="testing/.env"',title:'"testing/.env"'},"ENDPOINT=testing.com\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml",metastring:'title="Taskfile.yml"',title:'"Taskfile.yml"'},"version: '3'\n\nenv:\n ENV: testing\n\ndotenv: ['.env', '{{.ENV}}/.env.', '{{.HOME}}/.env']\n\ntasks:\n greet:\n cmds:\n - echo \"Using $KEYNAME and endpoint $ENDPOINT\"\n")),(0,i.kt)("p",null,"Dotenv files can also be specified at the task level:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nenv:\n ENV: testing\n\ntasks:\n greet:\n dotenv: ['.env', '{{.ENV}}/.env.', '{{.HOME}}/.env']\n cmds:\n - echo \"Using $KEYNAME and endpoint $ENDPOINT\"\n")),(0,i.kt)("p",null,"Environment variables specified explicitly at the task-level will override\nvariables defined in dotfiles:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nenv:\n ENV: testing\n\ntasks:\n greet:\n dotenv: ['.env', '{{.ENV}}/.env.', '{{.HOME}}/.env']\n env:\n KEYNAME: DIFFERENT_VALUE\n cmds:\n - echo \"Using $KEYNAME and endpoint $ENDPOINT\"\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Please note that you are not currently able to use the ",(0,i.kt)("inlineCode",{parentName:"p"},"dotenv")," key inside\nincluded Taskfiles.")),(0,i.kt)("h2",{id:"including-other-taskfiles"},"Including other Taskfiles"),(0,i.kt)("p",null,"If you want to share tasks between different projects (Taskfiles), you can use\nthe importing mechanism to include other Taskfiles using the ",(0,i.kt)("inlineCode",{parentName:"p"},"includes")," keyword:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n docs: ./documentation # will look for ./documentation/Taskfile.yml\n docker: ./DockerTasks.yml\n")),(0,i.kt)("p",null,"The tasks described in the given Taskfiles will be available with the informed\nnamespace. So, you'd call ",(0,i.kt)("inlineCode",{parentName:"p"},"task docs:serve")," to run the ",(0,i.kt)("inlineCode",{parentName:"p"},"serve")," task from\n",(0,i.kt)("inlineCode",{parentName:"p"},"documentation/Taskfile.yml")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"task docker:build")," to run the ",(0,i.kt)("inlineCode",{parentName:"p"},"build")," task from\nthe ",(0,i.kt)("inlineCode",{parentName:"p"},"DockerTasks.yml")," file."),(0,i.kt)("p",null,"Relative paths are resolved relative to the directory containing the including\nTaskfile."),(0,i.kt)("h3",{id:"os-specific-taskfiles"},"OS-specific Taskfiles"),(0,i.kt)("p",null,"With ",(0,i.kt)("inlineCode",{parentName:"p"},"version: '2'"),", task automatically includes any ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_{{OS}}.yml")," if it\nexists (for example: ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_windows.yml"),", ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_linux.yml")," or\n",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_darwin.yml"),"). Since this behavior was a bit too implicit, it was\nremoved on version 3, but you still can have a similar behavior by explicitly\nimporting these files:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n build: ./Taskfile_{{OS}}.yml\n")),(0,i.kt)("h3",{id:"directory-of-included-taskfile"},"Directory of included Taskfile"),(0,i.kt)("p",null,"By default, included Taskfile's tasks are run in the current directory, even if\nthe Taskfile is in another directory, but you can force its tasks to run in\nanother directory by using this alternative syntax:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n docs:\n taskfile: ./docs/Taskfile.yml\n dir: ./docs\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"The included Taskfiles must be using the same schema version as the main\nTaskfile uses.")),(0,i.kt)("h3",{id:"optional-includes"},"Optional includes"),(0,i.kt)("p",null,"Includes marked as optional will allow Task to continue execution as normal if\nthe included file is missing."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n tests:\n taskfile: ./tests/Taskfile.yml\n optional: true\n\ntasks:\n greet:\n cmds:\n - echo \"This command can still be successfully executed if\n ./tests/Taskfile.yml does not exist\"\n")),(0,i.kt)("h3",{id:"internal-includes"},"Internal includes"),(0,i.kt)("p",null,"Includes marked as internal will set all the tasks of the included file to be\ninternal as well (see the ",(0,i.kt)("a",{parentName:"p",href:"#internal-tasks"},"Internal tasks")," section below). This\nis useful when including utility tasks that are not intended to be used directly\nby the user."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n tests:\n taskfile: ./taskfiles/Utils.yml\n internal: true\n")),(0,i.kt)("h3",{id:"vars-of-included-taskfiles"},"Vars of included Taskfiles"),(0,i.kt)("p",null,"You can also specify variables when including a Taskfile. This may be useful for\nhaving reusable Taskfile that can be tweaked or even included more than once:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n backend:\n taskfile: ./taskfiles/Docker.yml\n vars:\n DOCKER_IMAGE: backend_image\n\n frontend:\n taskfile: ./taskfiles/Docker.yml\n vars:\n DOCKER_IMAGE: frontend_image\n")),(0,i.kt)("h3",{id:"namespace-aliases"},"Namespace aliases"),(0,i.kt)("p",null,"When including a Taskfile, you can give the namespace a list of ",(0,i.kt)("inlineCode",{parentName:"p"},"aliases"),". This\nworks in the same way as ",(0,i.kt)("a",{parentName:"p",href:"#task-aliases"},"task aliases")," and can be used together\nto create shorter and easier-to-type commands."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n generate:\n taskfile: ./taskfiles/Generate.yml\n aliases: [gen]\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Vars declared in the included Taskfile have preference over the variables in the\nincluding Taskfile! If you want a variable in an included Taskfile to be\noverridable, use the\n",(0,i.kt)("a",{parentName:"p",href:"https://go-task.github.io/slim-sprig/defaults.html"},"default function"),":\n",(0,i.kt)("inlineCode",{parentName:"p"},"MY_VAR: '{{.MY_VAR | default \"my-default-value\"}}'"),".")),(0,i.kt)("h2",{id:"internal-tasks"},"Internal tasks"),(0,i.kt)("p",null,"Internal tasks are tasks that cannot be called directly by the user. They will\nnot appear in the output when running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --list|--list-all"),". Other tasks may\ncall internal tasks in the usual way. This is useful for creating reusable,\nfunction-like tasks that have no useful purpose on the command line."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-image-1:\n cmds:\n - task: build-image\n vars:\n DOCKER_IMAGE: image-1\n\n build-image:\n internal: true\n cmds:\n - docker build -t {{.DOCKER_IMAGE}} .\n")),(0,i.kt)("h2",{id:"task-directory"},"Task directory"),(0,i.kt)("p",null,"By default, tasks will be executed in the directory where the Taskfile is\nlocated. But you can easily make the task run in another folder, informing\n",(0,i.kt)("inlineCode",{parentName:"p"},"dir"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n serve:\n dir: public/www\n cmds:\n # run http server\n - caddy\n")),(0,i.kt)("p",null,"If the directory does not exist, ",(0,i.kt)("inlineCode",{parentName:"p"},"task")," creates it."),(0,i.kt)("h2",{id:"task-dependencies"},"Task dependencies"),(0,i.kt)("blockquote",null,(0,i.kt)("p",{parentName:"blockquote"},"Dependencies run in parallel, so dependencies of a task should not depend one\nanother. If you want to force tasks to run serially, take a look at the\n",(0,i.kt)("a",{parentName:"p",href:"#calling-another-task"},"Calling Another Task")," section below.")),(0,i.kt)("p",null,"You may have tasks that depend on others. Just pointing them on ",(0,i.kt)("inlineCode",{parentName:"p"},"deps")," will make\nthem run automatically before running the parent task:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n deps: [assets]\n cmds:\n - go build -v -i main.go\n\n assets:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"In the above example, ",(0,i.kt)("inlineCode",{parentName:"p"},"assets")," will always run right before ",(0,i.kt)("inlineCode",{parentName:"p"},"build")," if you run\n",(0,i.kt)("inlineCode",{parentName:"p"},"task build"),"."),(0,i.kt)("p",null,"A task can have only dependencies and no commands to group tasks together:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n assets:\n deps: [js, css]\n\n js:\n cmds:\n - esbuild --bundle --minify js/index.js > public/bundle.js\n\n css:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"If there is more than one dependency, they always run in parallel for better\nperformance."),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"You can also make the tasks given by the command line run in parallel by using\nthe ",(0,i.kt)("inlineCode",{parentName:"p"},"--parallel")," flag (alias ",(0,i.kt)("inlineCode",{parentName:"p"},"-p"),"). Example: ",(0,i.kt)("inlineCode",{parentName:"p"},"task --parallel js css"),".")),(0,i.kt)("p",null,"If you want to pass information to dependencies, you can do that the same manner\nas you would to ",(0,i.kt)("a",{parentName:"p",href:"#calling-another-task"},"call another task"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n deps:\n - task: echo_sth\n vars: { TEXT: 'before 1' }\n - task: echo_sth\n vars: { TEXT: 'before 2' }\n cmds:\n - echo \"after\"\n\n echo_sth:\n cmds:\n - echo {{.TEXT}}\n")),(0,i.kt)("h2",{id:"platform-specific-tasks-and-commands"},"Platform specific tasks and commands"),(0,i.kt)("p",null,"If you want to restrict the running of tasks to explicit platforms, this can be\nachieved using the ",(0,i.kt)("inlineCode",{parentName:"p"},"platforms:")," key. Tasks can be restricted to a specific OS,\narchitecture or a combination of both. On a mismatch, the task or command will\nbe skipped, and no error will be thrown."),(0,i.kt)("p",null,"The values allowed as OS or Arch are valid ",(0,i.kt)("inlineCode",{parentName:"p"},"GOOS")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"GOARCH")," values, as\ndefined by the Go language\n",(0,i.kt)("a",{parentName:"p",href:"https://github.com/golang/go/blob/master/src/go/build/syslist.go"},"here"),"."),(0,i.kt)("p",null,"The ",(0,i.kt)("inlineCode",{parentName:"p"},"build-windows")," task below will run only on Windows, and on any\narchitecture:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-windows:\n platforms: [windows]\n cmds:\n - echo 'Running command on Windows'\n")),(0,i.kt)("p",null,"This can be restricted to a specific architecture as follows:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-windows-amd64:\n platforms: [windows/amd64]\n cmds:\n - echo 'Running command on Windows (amd64)'\n")),(0,i.kt)("p",null,"It is also possible to restrict the task to specific architectures:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-amd64:\n platforms: [amd64]\n cmds:\n - echo 'Running command on amd64'\n")),(0,i.kt)("p",null,"Multiple platforms can be specified as follows:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n platforms: [windows/amd64, darwin]\n cmds:\n - echo 'Running command on Windows (amd64) and macOS'\n")),(0,i.kt)("p",null,"Individual commands can also be restricted to specific platforms:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - cmd: echo 'Running command on Windows (amd64) and macOS'\n platforms: [windows/amd64, darwin]\n - cmd: echo 'Running on all platforms'\n")),(0,i.kt)("h2",{id:"calling-another-task"},"Calling another task"),(0,i.kt)("p",null,"When a task has many dependencies, they are executed concurrently. This will\noften result in a faster build pipeline. However, in some situations, you may\nneed to call other tasks serially. In this case, use the following syntax:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},'version: \'3\'\n\ntasks:\n main-task:\n cmds:\n - task: task-to-be-called\n - task: another-task\n - echo "Both done"\n\n task-to-be-called:\n cmds:\n - echo "Task to be called"\n\n another-task:\n cmds:\n - echo "Another task"\n')),(0,i.kt)("p",null,"Overriding variables in the called task is as simple as informing ",(0,i.kt)("inlineCode",{parentName:"p"},"vars"),"\nattribute:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n greet:\n vars:\n RECIPIENT: '{{default \"World\" .RECIPIENT}}'\n cmds:\n - echo \"Hello, {{.RECIPIENT}}!\"\n\n greet-pessimistically:\n cmds:\n - task: greet\n vars: { RECIPIENT: 'Cruel World' }\n")),(0,i.kt)("p",null,"The above syntax is also supported in ",(0,i.kt)("inlineCode",{parentName:"p"},"deps"),"."),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"NOTE: If you want to call a task declared in the root Taskfile from within an\n",(0,i.kt)("a",{parentName:"p",href:"#including-other-taskfiles"},"included Taskfile"),", add a leading ",(0,i.kt)("inlineCode",{parentName:"p"},":")," like this:\n",(0,i.kt)("inlineCode",{parentName:"p"},"task: :task-name"),".")),(0,i.kt)("h2",{id:"prevent-unnecessary-work"},"Prevent unnecessary work"),(0,i.kt)("h3",{id:"by-fingerprinting-locally-generated-files-and-their-sources"},"By fingerprinting locally generated files and their sources"),(0,i.kt)("p",null,"If a task generates something, you can inform Task the source and generated\nfiles, so Task will prevent running them if not necessary."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n deps: [js, css]\n cmds:\n - go build -v -i main.go\n\n js:\n cmds:\n - esbuild --bundle --minify js/index.js > public/bundle.js\n sources:\n - src/js/**/*.js\n generates:\n - public/bundle.js\n\n css:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n sources:\n - src/css/**/*.css\n generates:\n - public/bundle.css\n")),(0,i.kt)("p",null,(0,i.kt)("inlineCode",{parentName:"p"},"sources")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"generates")," can be files or file patterns. When given, Task will\ncompare the checksum of the source files to determine if it's necessary to run\nthe task. If not, it will just print a message like ",(0,i.kt)("inlineCode",{parentName:"p"},'Task "js" is up to date'),"."),(0,i.kt)("p",null,"If you prefer this check to be made by the modification timestamp of the files,\ninstead of its checksum (content), just set the ",(0,i.kt)("inlineCode",{parentName:"p"},"method")," property to\n",(0,i.kt)("inlineCode",{parentName:"p"},"timestamp"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - go build .\n sources:\n - ./*.go\n generates:\n - app{{exeExt}}\n method: timestamp\n")),(0,i.kt)("p",null,"In situations where you need more flexibility the ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," keyword can be used.\nYou can even combine the two. See the documentation for\n",(0,i.kt)("a",{parentName:"p",href:"#using-programmatic-checks-to-indicate-a-task-is-up-to-date"},"status")," for an\nexample."),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"By default, task stores checksums on a local ",(0,i.kt)("inlineCode",{parentName:"p"},".task")," directory in the project's\ndirectory. Most of the time, you'll want to have this directory on ",(0,i.kt)("inlineCode",{parentName:"p"},".gitignore"),"\n(or equivalent) so it isn't committed. (If you have a task for code generation\nthat is committed it may make sense to commit the checksum of that task as well,\nthough)."),(0,i.kt)("p",{parentName:"admonition"},"If you want these files to be stored in another directory, you can set a\n",(0,i.kt)("inlineCode",{parentName:"p"},"TASK_TEMP_DIR")," environment variable in your machine. It can contain a relative\npath like ",(0,i.kt)("inlineCode",{parentName:"p"},"tmp/task")," that will be interpreted as relative to the project\ndirectory, or an absolute or home path like ",(0,i.kt)("inlineCode",{parentName:"p"},"/tmp/.task")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"~/.task"),"\n(subdirectories will be created for each project)."),(0,i.kt)("pre",{parentName:"admonition"},(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"export TASK_TEMP_DIR='~/.task'\n"))),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Each task has only one checksum stored for its ",(0,i.kt)("inlineCode",{parentName:"p"},"sources"),". If you want to\ndistinguish a task by any of its input variables, you can add those variables as\npart of the task's label, and it will be considered a different task."),(0,i.kt)("p",{parentName:"admonition"},"This is useful if you want to run a task once for each distinct set of inputs\nuntil the sources actually change. For example, if the sources depend on the\nvalue of a variable, or you if you want the task to rerun if some arguments\nchange even if the source has not.")),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"The method ",(0,i.kt)("inlineCode",{parentName:"p"},"none")," skips any validation and always run the task.")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"For the ",(0,i.kt)("inlineCode",{parentName:"p"},"checksum")," (default) or ",(0,i.kt)("inlineCode",{parentName:"p"},"timestamp")," method to work, it is only necessary\nto inform the source files. When the ",(0,i.kt)("inlineCode",{parentName:"p"},"timestamp")," method is used, the last time\nof the running the task is considered as a generate.")),(0,i.kt)("h3",{id:"using-programmatic-checks-to-indicate-a-task-is-up-to-date"},"Using programmatic checks to indicate a task is up to date"),(0,i.kt)("p",null,"Alternatively, you can inform a sequence of tests as ",(0,i.kt)("inlineCode",{parentName:"p"},"status"),". If no error is\nreturned (exit status 0), the task is considered up-to-date:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n generate-files:\n cmds:\n - mkdir directory\n - touch directory/file1.txt\n - touch directory/file2.txt\n # test existence of files\n status:\n - test -d directory\n - test -f directory/file1.txt\n - test -f directory/file2.txt\n")),(0,i.kt)("p",null,"Normally, you would use ",(0,i.kt)("inlineCode",{parentName:"p"},"sources")," in combination with ",(0,i.kt)("inlineCode",{parentName:"p"},"generates")," - but for\ntasks that generate remote artifacts (Docker images, deploys, CD releases) the\nchecksum source and timestamps require either access to the artifact or for an\nout-of-band refresh of the ",(0,i.kt)("inlineCode",{parentName:"p"},".checksum")," fingerprint file."),(0,i.kt)("p",null,"Two special variables ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.CHECKSUM}}")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.TIMESTAMP}}")," are available for\ninterpolation within ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," commands, depending on the method assigned to\nfingerprint the sources. Only ",(0,i.kt)("inlineCode",{parentName:"p"},"source")," globs are fingerprinted."),(0,i.kt)("p",null,"Note that the ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.TIMESTAMP}}"),' variable is a "live" Go ',(0,i.kt)("inlineCode",{parentName:"p"},"time.Time")," struct, and\ncan be formatted using any of the methods that ",(0,i.kt)("inlineCode",{parentName:"p"},"time.Time")," responds to."),(0,i.kt)("p",null,"See ",(0,i.kt)("a",{parentName:"p",href:"https://golang.org/pkg/time/"},"the Go Time documentation")," for more\ninformation."),(0,i.kt)("p",null,"You can use ",(0,i.kt)("inlineCode",{parentName:"p"},"--force")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"-f")," if you want to force a task to run even when\nup-to-date."),(0,i.kt)("p",null,"Also, ",(0,i.kt)("inlineCode",{parentName:"p"},"task --status [tasks]...")," will exit with a non-zero exit code if any of\nthe tasks are not up-to-date."),(0,i.kt)("p",null,(0,i.kt)("inlineCode",{parentName:"p"},"status")," can be combined with the\n",(0,i.kt)("a",{parentName:"p",href:"#by-fingerprinting-locally-generated-files-and-their-sources"},"fingerprinting"),"\nto have a task run if either the the source/generated artifacts changes, or the\nprogrammatic check fails:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:prod:\n desc: Build for production usage.\n cmds:\n - composer install\n # Run this task if source files changes.\n sources:\n - composer.json\n - composer.lock\n generates:\n - ./vendor/composer/installed.json\n - ./vendor/autoload.php\n # But also run the task if the last build was not a production build.\n status:\n - grep -q '\"dev\": false' ./vendor/composer/installed.json\n")),(0,i.kt)("h3",{id:"using-programmatic-checks-to-cancel-the-execution-of-a-task-and-its-dependencies"},"Using programmatic checks to cancel the execution of a task and its dependencies"),(0,i.kt)("p",null,"In addition to ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," checks, ",(0,i.kt)("inlineCode",{parentName:"p"},"preconditions")," checks are the logical inverse\nof ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," checks. That is, if you need a certain set of conditions to be\n",(0,i.kt)("em",{parentName:"p"},"true")," you can use the ",(0,i.kt)("inlineCode",{parentName:"p"},"preconditions")," stanza. ",(0,i.kt)("inlineCode",{parentName:"p"},"preconditions")," are similar to\n",(0,i.kt)("inlineCode",{parentName:"p"},"status")," lines, except they support ",(0,i.kt)("inlineCode",{parentName:"p"},"sh")," expansion, and they SHOULD all\nreturn 0."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n generate-files:\n cmds:\n - mkdir directory\n - touch directory/file1.txt\n - touch directory/file2.txt\n # test existence of files\n preconditions:\n - test -f .env\n - sh: '[ 1 = 0 ]'\n msg: \"One doesn't equal Zero, Halting\"\n")),(0,i.kt)("p",null,"Preconditions can set specific failure messages that can tell a user what steps\nto take using the ",(0,i.kt)("inlineCode",{parentName:"p"},"msg")," field."),(0,i.kt)("p",null,"If a task has a dependency on a sub-task with a precondition, and that\nprecondition is not met - the calling task will fail. Note that a task executed\nwith a failing precondition will not run unless ",(0,i.kt)("inlineCode",{parentName:"p"},"--force")," is given."),(0,i.kt)("p",null,"Unlike ",(0,i.kt)("inlineCode",{parentName:"p"},"status"),", which will skip a task if it is up to date and continue\nexecuting tasks that depend on it, a ",(0,i.kt)("inlineCode",{parentName:"p"},"precondition")," will fail a task, along with\nany other tasks that depend on it."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n task-will-fail:\n preconditions:\n - sh: 'exit 1'\n\n task-will-also-fail:\n deps:\n - task-will-fail\n\n task-will-still-fail:\n cmds:\n - task: task-will-fail\n - echo \"I will not run\"\n")),(0,i.kt)("h3",{id:"limiting-when-tasks-run"},"Limiting when tasks run"),(0,i.kt)("p",null,"If a task executed by multiple ",(0,i.kt)("inlineCode",{parentName:"p"},"cmds")," or multiple ",(0,i.kt)("inlineCode",{parentName:"p"},"deps")," you can control when it\nis executed using ",(0,i.kt)("inlineCode",{parentName:"p"},"run"),". ",(0,i.kt)("inlineCode",{parentName:"p"},"run")," can also be set at the root of the Taskfile to\nchange the behavior of all the tasks unless explicitly overridden."),(0,i.kt)("p",null,"Supported values for ",(0,i.kt)("inlineCode",{parentName:"p"},"run"),":"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"always")," (default) always attempt to invoke the task regardless of the number\nof previous executions"),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"once")," only invoke this task once regardless of the number of references"),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"when_changed")," only invokes the task once for each unique set of variables\npassed into the task")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - task: generate-file\n vars: { CONTENT: '1' }\n - task: generate-file\n vars: { CONTENT: '2' }\n - task: generate-file\n vars: { CONTENT: '2' }\n\n generate-file:\n run: when_changed\n deps:\n - install-deps\n cmds:\n - echo {{.CONTENT}}\n\n install-deps:\n run: once\n cmds:\n - sleep 5 # long operation like installing packages\n")),(0,i.kt)("h2",{id:"variables"},"Variables"),(0,i.kt)("p",null,"When doing interpolation of variables, Task will look for the below. They are\nlisted below in order of importance (i.e. most important first):"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Variables declared in the task definition"),(0,i.kt)("li",{parentName:"ul"},"Variables given while calling a task from another (See\n",(0,i.kt)("a",{parentName:"li",href:"#calling-another-task"},"Calling another task")," above)"),(0,i.kt)("li",{parentName:"ul"},"Variables of the ",(0,i.kt)("a",{parentName:"li",href:"#including-other-taskfiles"},"included Taskfile")," (when the\ntask is included)"),(0,i.kt)("li",{parentName:"ul"},"Variables of the ",(0,i.kt)("a",{parentName:"li",href:"#vars-of-included-taskfiles"},"inclusion of the Taskfile"),"\n(when the task is included)"),(0,i.kt)("li",{parentName:"ul"},"Global variables (those declared in the ",(0,i.kt)("inlineCode",{parentName:"li"},"vars:")," option in the Taskfile)"),(0,i.kt)("li",{parentName:"ul"},"Environment variables")),(0,i.kt)("p",null,"Example of sending parameters with environment variables:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"$ TASK_VARIABLE=a-value task do-something\n")),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"A special variable ",(0,i.kt)("inlineCode",{parentName:"p"},".TASK")," is always available containing the task name.")),(0,i.kt)("p",null,"Since some shells do not support the above syntax to set environment variables\n(Windows) tasks also accept a similar style when not at the beginning of the\ncommand."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},'$ task write-file FILE=file.txt "CONTENT=Hello, World!" print "MESSAGE=All done!"\n')),(0,i.kt)("p",null,"Example of locally declared vars:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n print-var:\n cmds:\n - echo \"{{.VAR}}\"\n vars:\n VAR: Hello!\n")),(0,i.kt)("p",null,"Example of global vars in a ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile.yml"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nvars:\n GREETING: Hello from Taskfile!\n\ntasks:\n greet:\n cmds:\n - echo \"{{.GREETING}}\"\n")),(0,i.kt)("h3",{id:"dynamic-variables"},"Dynamic variables"),(0,i.kt)("p",null,"The below syntax (",(0,i.kt)("inlineCode",{parentName:"p"},"sh:")," prop in a variable) is considered a dynamic variable.\nThe value will be treated as a command and the output assigned. If there are one\nor more trailing newlines, the last newline will be trimmed."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - go build -ldflags=\"-X main.Version={{.GIT_COMMIT}}\" main.go\n vars:\n GIT_COMMIT:\n sh: git log -n 1 --format=%h\n")),(0,i.kt)("p",null,"This works for all types of variables."),(0,i.kt)("h2",{id:"forwarding-cli-arguments-to-commands"},"Forwarding CLI arguments to commands"),(0,i.kt)("p",null,"If ",(0,i.kt)("inlineCode",{parentName:"p"},"--")," is given in the CLI, all following parameters are added to a special\n",(0,i.kt)("inlineCode",{parentName:"p"},".CLI_ARGS")," variable. This is useful to forward arguments to another command."),(0,i.kt)("p",null,"The below example will run ",(0,i.kt)("inlineCode",{parentName:"p"},"yarn install"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"$ task yarn -- install\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n yarn:\n cmds:\n - yarn {{.CLI_ARGS}}\n")),(0,i.kt)("h2",{id:"doing-task-cleanup-with-defer"},"Doing task cleanup with ",(0,i.kt)("inlineCode",{parentName:"h2"},"defer")),(0,i.kt)("p",null,"With the ",(0,i.kt)("inlineCode",{parentName:"p"},"defer")," keyword, it's possible to schedule cleanup to be run once the\ntask finishes. The difference with just putting it as the last command is that\nthis command will run even when the task fails."),(0,i.kt)("p",null,"In the example below, ",(0,i.kt)("inlineCode",{parentName:"p"},"rm -rf tmpdir/")," will run even if the third command fails:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - mkdir -p tmpdir/\n - defer: rm -rf tmpdir/\n - echo 'Do work on tmpdir/'\n")),(0,i.kt)("p",null,"If you want to move the cleanup command into another task, that is possible as\nwell:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - mkdir -p tmpdir/\n - defer: { task: cleanup }\n - echo 'Do work on tmpdir/'\n\n cleanup: rm -rf tmpdir/\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Due to the nature of how the\n",(0,i.kt)("a",{parentName:"p",href:"https://go.dev/tour/flowcontrol/13"},"Go's own ",(0,i.kt)("inlineCode",{parentName:"a"},"defer")," work"),", the deferred\ncommands are executed in the reverse order if you schedule multiple of them.")),(0,i.kt)("h2",{id:"gos-template-engine"},"Go's template engine"),(0,i.kt)("p",null,"Task parse commands as ",(0,i.kt)("a",{parentName:"p",href:"https://golang.org/pkg/text/template/"},"Go's template engine")," before executing them.\nVariables are accessible through dot syntax (",(0,i.kt)("inlineCode",{parentName:"p"},".VARNAME"),")."),(0,i.kt)("p",null,"All functions by the Go's\n",(0,i.kt)("a",{parentName:"p",href:"https://go-task.github.io/slim-sprig/"},"slim-sprig lib")," are available. The\nfollowing example gets the current date in a given format:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n print-date:\n cmds:\n - echo {{now | date \"2006-01-02\"}}\n")),(0,i.kt)("p",null,"Task also adds the following functions:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"OS"),': Returns the operating system. Possible values are "windows", "linux",\n"darwin" (macOS) and "freebsd".'),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"ARCH"),': return the architecture Task was compiled to: "386", "amd64", "arm" or\n"s390x".'),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"splitLines"),": Splits Unix (\\n) and Windows (\\r\\n) styled newlines."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"catLines"),": Replaces Unix (\\n) and Windows (\\r\\n) styled newlines with a\nspace."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"toSlash"),": Does nothing on Unix, but on Windows converts a string from ",(0,i.kt)("inlineCode",{parentName:"li"},"\\"),"\npath format to ",(0,i.kt)("inlineCode",{parentName:"li"},"/"),"."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"fromSlash"),": Opposite of ",(0,i.kt)("inlineCode",{parentName:"li"},"toSlash"),". Does nothing on Unix, but on Windows\nconverts a string from ",(0,i.kt)("inlineCode",{parentName:"li"},"/")," path format to ",(0,i.kt)("inlineCode",{parentName:"li"},"\\"),"."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"exeExt"),": Returns the right executable extension for the current OS (",(0,i.kt)("inlineCode",{parentName:"li"},'".exe"'),"\nfor Windows, ",(0,i.kt)("inlineCode",{parentName:"li"},'""')," for others)."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"shellQuote"),": Quotes a string to make it safe for use in shell scripts. Task\nuses ",(0,i.kt)("a",{parentName:"li",href:"https://pkg.go.dev/mvdan.cc/sh/v3@v3.4.0/syntax#Quote"},"this Go function"),"\nfor this. The Bash dialect is assumed."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"splitArgs"),": Splits a string as if it were a command's arguments. Task uses\n",(0,i.kt)("a",{parentName:"li",href:"https://pkg.go.dev/mvdan.cc/sh/v3@v3.4.0/shell#Fields"},"this Go function"))),(0,i.kt)("p",null,"Example:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n print-os:\n cmds:\n - echo '{{OS}} {{ARCH}}'\n - echo '{{if eq OS \"windows\"}}windows-command{{else}}unix-command{{end}}'\n # This will be path/to/file on Unix but path\\to\\file on Windows\n - echo '{{fromSlash \"path/to/file\"}}'\n enumerated-file:\n vars:\n CONTENT: |\n foo\n bar\n cmds:\n - |\n cat << EOF > output.txt\n {{range $i, $line := .CONTENT | splitLines -}}\n {{printf \"%3d\" $i}}: {{$line}}\n {{end}}EOF\n")),(0,i.kt)("h2",{id:"help"},"Help"),(0,i.kt)("p",null,"Running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --list")," (or ",(0,i.kt)("inlineCode",{parentName:"p"},"task -l"),") lists all tasks with a description. The\nfollowing Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n desc: Build the go binary.\n cmds:\n - go build -v -i main.go\n\n test:\n desc: Run all the go tests.\n cmds:\n - go test -race ./...\n\n js:\n cmds:\n - esbuild --bundle --minify js/index.js > public/bundle.js\n\n css:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"would print the following output:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"* build: Build the go binary.\n* test: Run all the go tests.\n")),(0,i.kt)("p",null,"If you want to see all tasks, there's a ",(0,i.kt)("inlineCode",{parentName:"p"},"--list-all")," (alias ",(0,i.kt)("inlineCode",{parentName:"p"},"-a"),") flag as well."),(0,i.kt)("h2",{id:"display-summary-of-task"},"Display summary of task"),(0,i.kt)("p",null,"Running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --summary task-name")," will show a summary of a task. The following\nTaskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n release:\n deps: [build]\n summary: |\n Release your project to github\n\n It will build your project before starting the release.\n Please make sure that you have set GITHUB_TOKEN before starting.\n cmds:\n - your-release-tool\n\n build:\n cmds:\n - your-build-tool\n")),(0,i.kt)("p",null,"with running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --summary release")," would print the following output:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre"},"task: release\n\nRelease your project to github\n\nIt will build your project before starting the release.\nPlease make sure that you have set GITHUB_TOKEN before starting.\n\ndependencies:\n - build\n\ncommands:\n - your-release-tool\n")),(0,i.kt)("p",null,"If a summary is missing, the description will be printed. If the task does not\nhave a summary or a description, a warning is printed."),(0,i.kt)("p",null,"Please note: ",(0,i.kt)("em",{parentName:"p"},"showing the summary will not execute the command"),"."),(0,i.kt)("h2",{id:"task-aliases"},"Task aliases"),(0,i.kt)("p",null,"Aliases are alternative names for tasks. They can be used to make it easier and\nquicker to run tasks with long or hard-to-type names. You can use them on the\ncommand line, when ",(0,i.kt)("a",{parentName:"p",href:"#calling-another-task"},"calling sub-tasks")," in your Taskfile\nand when ",(0,i.kt)("a",{parentName:"p",href:"#including-other-taskfiles"},"including tasks")," with aliases from another\nTaskfile. They can also be used together with\n",(0,i.kt)("a",{parentName:"p",href:"#namespace-aliases"},"namespace aliases"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n generate:\n aliases: [gen]\n cmds:\n - task: gen-mocks\n\n generate-mocks:\n aliases: [gen-mocks]\n cmds:\n - echo \"generating...\"\n")),(0,i.kt)("h2",{id:"overriding-task-name"},"Overriding task name"),(0,i.kt)("p",null,"Sometimes you may want to override the task name printed on the summary,\nup-to-date messages to STDOUT, etc. In this case, you can just set ",(0,i.kt)("inlineCode",{parentName:"p"},"label:"),",\nwhich can also be interpolated with variables:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n - task: print\n vars:\n MESSAGE: hello\n - task: print\n vars:\n MESSAGE: world\n\n print:\n label: 'print-{{.MESSAGE}}'\n cmds:\n - echo \"{{.MESSAGE}}\"\n")),(0,i.kt)("h2",{id:"silent-mode"},"Silent mode"),(0,i.kt)("p",null,"Silent mode disables the echoing of commands before Task runs it. For the\nfollowing Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - echo \"Print something\"\n")),(0,i.kt)("p",null,"Normally this will be printed:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-sh"},'echo "Print something"\nPrint something\n')),(0,i.kt)("p",null,"With silent mode on, the below will be printed instead:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-sh"},"Print something\n")),(0,i.kt)("p",null,"There are four ways to enable silent mode:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"At command level:")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - cmd: echo \"Print something\"\n silent: true\n")),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"At task level:")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - echo \"Print something\"\n silent: true\n")),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Globally at Taskfile level:")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nsilent: true\n\ntasks:\n echo:\n cmds:\n - echo \"Print something\"\n")),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Or globally with ",(0,i.kt)("inlineCode",{parentName:"li"},"--silent")," or ",(0,i.kt)("inlineCode",{parentName:"li"},"-s")," flag")),(0,i.kt)("p",null,"If you want to suppress STDOUT instead, just redirect a command to ",(0,i.kt)("inlineCode",{parentName:"p"},"/dev/null"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - echo \"This will print nothing\" > /dev/null\n")),(0,i.kt)("h2",{id:"dry-run-mode"},"Dry run mode"),(0,i.kt)("p",null,"Dry run mode (",(0,i.kt)("inlineCode",{parentName:"p"},"--dry"),") compiles and steps through each task, printing the\ncommands that would be run without executing them. This is useful for debugging\nyour Taskfiles."),(0,i.kt)("h2",{id:"ignore-errors"},"Ignore errors"),(0,i.kt)("p",null,"You have the option to ignore errors during command execution. Given the\nfollowing Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - exit 1\n - echo \"Hello World\"\n")),(0,i.kt)("p",null,"Task will abort the execution after running ",(0,i.kt)("inlineCode",{parentName:"p"},"exit 1")," because the status code ",(0,i.kt)("inlineCode",{parentName:"p"},"1"),"\nstands for ",(0,i.kt)("inlineCode",{parentName:"p"},"EXIT_FAILURE"),". However, it is possible to continue with execution\nusing ",(0,i.kt)("inlineCode",{parentName:"p"},"ignore_error"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - cmd: exit 1\n ignore_error: true\n - echo \"Hello World\"\n")),(0,i.kt)("p",null,(0,i.kt)("inlineCode",{parentName:"p"},"ignore_error")," can also be set for a task, which means errors will be suppressed\nfor all commands. Nevertheless, keep in mind that this option will not propagate\nto other tasks called either by ",(0,i.kt)("inlineCode",{parentName:"p"},"deps")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"cmds"),"!"),(0,i.kt)("h2",{id:"output-syntax"},"Output syntax"),(0,i.kt)("p",null,"By default, Task just redirects the STDOUT and STDERR of the running commands to\nthe shell in real-time. This is good for having live feedback for logging\nprinted by commands, but the output can become messy if you have multiple\ncommands running simultaneously and printing lots of stuff."),(0,i.kt)("p",null,"To make this more customizable, there are currently three different output\noptions you can choose:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"interleaved")," (default)"),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"group")),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"prefixed"))),(0,i.kt)("p",null,"To choose another one, just set it to root in the Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\noutput: 'group'\n\ntasks:\n # ...\n")),(0,i.kt)("p",null,"The ",(0,i.kt)("inlineCode",{parentName:"p"},"group")," output will print the entire output of a command once after it\nfinishes, so you will not have live feedback for commands that take a long time\nto run."),(0,i.kt)("p",null,"When using the ",(0,i.kt)("inlineCode",{parentName:"p"},"group")," output, you can optionally provide a templated message to\nprint at the start and end of the group. This can be useful for instructing CI\nsystems to group all of the output for a given task, such as with\n",(0,i.kt)("a",{parentName:"p",href:"https://docs.github.com/en/actions/learn-github-actions/workflow-commands-for-github-actions#grouping-log-lines"},"GitHub Actions' ",(0,i.kt)("inlineCode",{parentName:"a"},"::group::")," command"),"\nor\n",(0,i.kt)("a",{parentName:"p",href:"https://docs.microsoft.com/en-us/azure/devops/pipelines/scripts/logging-commands?expand=1&view=azure-devops&tabs=bash#formatting-commands"},"Azure Pipelines"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\noutput:\n group:\n begin: '::group::{{.TASK}}'\n end: '::endgroup::'\n\ntasks:\n default:\n cmds:\n - echo 'Hello, World!'\n silent: true\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"$ task default\n::group::default\nHello, World!\n::endgroup::\n")),(0,i.kt)("p",null,"When using the ",(0,i.kt)("inlineCode",{parentName:"p"},"group")," output, you may swallow the output of the executed\ncommand on standard output and standard error if it does not fail (zero exit\ncode)."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nsilent: true\n\noutput:\n group:\n error_only: true\n\ntasks:\n passes: echo 'output-of-passes'\n errors: echo 'output-of-errors' && exit 1\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},'$ task passes\n$ task errors\noutput-of-errors\ntask: Failed to run task "errors": exit status 1\n')),(0,i.kt)("p",null,"The ",(0,i.kt)("inlineCode",{parentName:"p"},"prefix")," output will prefix every line printed by a command with\n",(0,i.kt)("inlineCode",{parentName:"p"},"[task-name] ")," as the prefix, but you can customize the prefix for a command\nwith the ",(0,i.kt)("inlineCode",{parentName:"p"},"prefix:")," attribute:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\noutput: prefixed\n\ntasks:\n default:\n deps:\n - task: print\n vars: { TEXT: foo }\n - task: print\n vars: { TEXT: bar }\n - task: print\n vars: { TEXT: baz }\n\n print:\n cmds:\n - echo \"{{.TEXT}}\"\n prefix: 'print-{{.TEXT}}'\n silent: true\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"$ task default\n[print-foo] foo\n[print-bar] bar\n[print-baz] baz\n")),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"The ",(0,i.kt)("inlineCode",{parentName:"p"},"output")," option can also be specified by the ",(0,i.kt)("inlineCode",{parentName:"p"},"--output")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"-o")," flags.")),(0,i.kt)("h2",{id:"interactive-cli-application"},"Interactive CLI application"),(0,i.kt)("p",null,"When running interactive CLI applications inside Task they can sometimes behave\nweirdly, especially when the ",(0,i.kt)("a",{parentName:"p",href:"#output-syntax"},"output mode")," is set to something\nother than ",(0,i.kt)("inlineCode",{parentName:"p"},"interleaved")," (the default), or when interactive apps are run in\nparallel with other tasks."),(0,i.kt)("p",null,"The ",(0,i.kt)("inlineCode",{parentName:"p"},"interactive: true")," tells Task this is an interactive application and Task\nwill try to optimize for it:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - vim my-file.txt\n interactive: true\n")),(0,i.kt)("p",null,"If you still have problems running an interactive app through Task, please open\nan issue about it."),(0,i.kt)("h2",{id:"short-task-syntax"},"Short task syntax"),(0,i.kt)("p",null,"Starting on Task v3, you can now write tasks with a shorter syntax if they have\nthe default settings (e.g. no custom ",(0,i.kt)("inlineCode",{parentName:"p"},"env:"),", ",(0,i.kt)("inlineCode",{parentName:"p"},"vars:"),", ",(0,i.kt)("inlineCode",{parentName:"p"},"desc:"),", ",(0,i.kt)("inlineCode",{parentName:"p"},"silent:")," , etc):"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build: go build -v -o ./app{{exeExt}} .\n\n run:\n - task: build\n - ./app{{exeExt}} -h localhost -p 8080\n")),(0,i.kt)("h2",{id:"set-and-shopt"},(0,i.kt)("inlineCode",{parentName:"h2"},"set")," and ",(0,i.kt)("inlineCode",{parentName:"h2"},"shopt")),(0,i.kt)("p",null,"It's possible to specify options to the\n",(0,i.kt)("a",{parentName:"p",href:"https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html"},(0,i.kt)("inlineCode",{parentName:"a"},"set")),"\nand\n",(0,i.kt)("a",{parentName:"p",href:"https://www.gnu.org/software/bash/manual/html_node/The-Shopt-Builtin.html"},(0,i.kt)("inlineCode",{parentName:"a"},"shopt")),"\nbuiltins. This can be added at global, task or command level."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nset: [pipefail]\nshopt: [globstar]\n\ntasks:\n # `globstar` required for double star globs to work\n default: echo **/*.go\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Keep in mind that not all options are available in the\n",(0,i.kt)("a",{parentName:"p",href:"https://github.com/mvdan/sh"},"shell interpreter library")," that Task uses.")),(0,i.kt)("h2",{id:"watch-tasks"},"Watch tasks"),(0,i.kt)("p",null,"With the flags ",(0,i.kt)("inlineCode",{parentName:"p"},"--watch")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"-w")," task will watch for file changes and run the\ntask again. This requires the ",(0,i.kt)("inlineCode",{parentName:"p"},"sources")," attribute to be given, so task knows\nwhich files to watch."),(0,i.kt)("p",null,"The default watch interval is 5 seconds, but it's possible to change it by\neither setting ",(0,i.kt)("inlineCode",{parentName:"p"},"interval: '500ms'")," in the root of the Taskfile passing it as an\nargument like ",(0,i.kt)("inlineCode",{parentName:"p"},"--interval=500ms"),"."))}u.isMDXComponent=!0}}]); \ No newline at end of file diff --git a/assets/js/6476eba6.fa3f1cc9.js b/assets/js/6476eba6.fa3f1cc9.js new file mode 100644 index 00000000..5905883d --- /dev/null +++ b/assets/js/6476eba6.fa3f1cc9.js @@ -0,0 +1 @@ +"use strict";(self.webpackChunktaskfile_dev=self.webpackChunktaskfile_dev||[]).push([[827],{3905:function(e,n,t){t.d(n,{Zo:function(){return d},kt:function(){return k}});var a=t(7294);function i(e,n,t){return n in e?Object.defineProperty(e,n,{value:t,enumerable:!0,configurable:!0,writable:!0}):e[n]=t,e}function l(e,n){var t=Object.keys(e);if(Object.getOwnPropertySymbols){var a=Object.getOwnPropertySymbols(e);n&&(a=a.filter((function(n){return Object.getOwnPropertyDescriptor(e,n).enumerable}))),t.push.apply(t,a)}return t}function s(e){for(var n=1;n=0||(i[t]=e[t]);return i}(e,n);if(Object.getOwnPropertySymbols){var l=Object.getOwnPropertySymbols(e);for(a=0;a=0||Object.prototype.propertyIsEnumerable.call(e,t)&&(i[t]=e[t])}return i}var r=a.createContext({}),p=function(e){var n=a.useContext(r),t=n;return e&&(t="function"==typeof e?e(n):s(s({},n),e)),t},d=function(e){var n=p(e.components);return a.createElement(r.Provider,{value:n},e.children)},u="mdxType",m={inlineCode:"code",wrapper:function(e){var n=e.children;return a.createElement(a.Fragment,{},n)}},c=a.forwardRef((function(e,n){var t=e.components,i=e.mdxType,l=e.originalType,r=e.parentName,d=o(e,["components","mdxType","originalType","parentName"]),u=p(t),c=i,k=u["".concat(r,".").concat(c)]||u[c]||m[c]||l;return t?a.createElement(k,s(s({ref:n},d),{},{components:t})):a.createElement(k,s({ref:n},d))}));function k(e,n){var t=arguments,i=n&&n.mdxType;if("string"==typeof e||i){var l=t.length,s=new Array(l);s[0]=c;var o={};for(var r in n)hasOwnProperty.call(n,r)&&(o[r]=n[r]);o.originalType=e,o[u]="string"==typeof e?e:i,s[1]=o;for(var p=2;pdefer",id:"doing-task-cleanup-with-defer",level:2},{value:"Go's template engine",id:"gos-template-engine",level:2},{value:"Help",id:"help",level:2},{value:"Display summary of task",id:"display-summary-of-task",level:2},{value:"Task aliases",id:"task-aliases",level:2},{value:"Overriding task name",id:"overriding-task-name",level:2},{value:"Silent mode",id:"silent-mode",level:2},{value:"Dry run mode",id:"dry-run-mode",level:2},{value:"Ignore errors",id:"ignore-errors",level:2},{value:"Output syntax",id:"output-syntax",level:2},{value:"Interactive CLI application",id:"interactive-cli-application",level:2},{value:"Short task syntax",id:"short-task-syntax",level:2},{value:"set and shopt",id:"set-and-shopt",level:2},{value:"Watch tasks",id:"watch-tasks",level:2}],d={toc:p};function u(e){let{components:n,...t}=e;return(0,i.kt)("wrapper",(0,a.Z)({},d,t,{components:n,mdxType:"MDXLayout"}),(0,i.kt)("h1",{id:"usage"},"Usage"),(0,i.kt)("h2",{id:"getting-started"},"Getting started"),(0,i.kt)("p",null,"Create a file called ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile.yml")," in the root of your project. The ",(0,i.kt)("inlineCode",{parentName:"p"},"cmds"),"\nattribute should contain the commands of a task. The example below allows\ncompiling a Go app and uses ",(0,i.kt)("a",{parentName:"p",href:"https://esbuild.github.io/"},"esbuild")," to concat and\nminify multiple CSS files into a single one."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - go build -v -i main.go\n\n assets:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"Running the tasks is as simple as running:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"task assets build\n")),(0,i.kt)("p",null,"Task uses ",(0,i.kt)("a",{parentName:"p",href:"https://mvdan.cc/sh/"},"mvdan.cc/sh"),", a native Go sh interpreter. So\nyou can write sh/bash commands, and it will work even on Windows, where ",(0,i.kt)("inlineCode",{parentName:"p"},"sh")," or\n",(0,i.kt)("inlineCode",{parentName:"p"},"bash")," are usually not available. Just remember any executable called must be\navailable by the OS or in PATH."),(0,i.kt)("p",null,'If you omit a task name, "default" will be assumed.'),(0,i.kt)("h2",{id:"supported-file-names"},"Supported file names"),(0,i.kt)("p",null,"Task will look for the following file names, in order of priority:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Taskfile.yml"),(0,i.kt)("li",{parentName:"ul"},"Taskfile.yaml"),(0,i.kt)("li",{parentName:"ul"},"Taskfile.dist.yml"),(0,i.kt)("li",{parentName:"ul"},"Taskfile.dist.yaml")),(0,i.kt)("p",null,"The intention of having the ",(0,i.kt)("inlineCode",{parentName:"p"},".dist")," variants is to allow projects to have one\ncommitted version (",(0,i.kt)("inlineCode",{parentName:"p"},".dist"),") while still allowing individual users to override\nthe Taskfile by adding an additional ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile.yml")," (which would be on\n",(0,i.kt)("inlineCode",{parentName:"p"},".gitignore"),")."),(0,i.kt)("h3",{id:"running-a-taskfile-from-a-subdirectory"},"Running a Taskfile from a subdirectory"),(0,i.kt)("p",null,"If a Taskfile cannot be found in the current working directory, it will walk up\nthe file tree until it finds one (similar to how ",(0,i.kt)("inlineCode",{parentName:"p"},"git")," works). When running Task\nfrom a subdirectory like this, it will behave as if you ran it from the\ndirectory containing the Taskfile."),(0,i.kt)("p",null,"You can use this functionality along with the special ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.USER_WORKING_DIR}}"),"\nvariable to create some very useful reusable tasks. For example, if you have a\nmonorepo with directories for each microservice, you can ",(0,i.kt)("inlineCode",{parentName:"p"},"cd")," into a\nmicroservice directory and run a task command to bring it up without having to\ncreate multiple tasks or Taskfiles with identical content. For example:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n up:\n dir: '{{.USER_WORKING_DIR}}'\n preconditions:\n - test -f docker-compose.yml\n cmds:\n - docker-compose up -d\n")),(0,i.kt)("p",null,"In this example, we can run ",(0,i.kt)("inlineCode",{parentName:"p"},"cd ")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"task up")," and as long as the\n",(0,i.kt)("inlineCode",{parentName:"p"},"")," directory contains a ",(0,i.kt)("inlineCode",{parentName:"p"},"docker-compose.yml"),", the Docker composition\nwill be brought up."),(0,i.kt)("h3",{id:"running-a-global-taskfile"},"Running a global Taskfile"),(0,i.kt)("p",null,"If you call Task with the ",(0,i.kt)("inlineCode",{parentName:"p"},"--global")," (alias ",(0,i.kt)("inlineCode",{parentName:"p"},"-g"),") flag, it will look for your\nhome directory instead of your working directory. In short, Task will look for a\nTaskfile on either ",(0,i.kt)("inlineCode",{parentName:"p"},"$HOME/Taskfile.yml")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"$HOME/Taskfile.yaml")," paths."),(0,i.kt)("p",null,"This is useful to have automation that you can run from anywhere in your system!"),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"When running your global Taskfile with ",(0,i.kt)("inlineCode",{parentName:"p"},"-g"),", tasks will run on ",(0,i.kt)("inlineCode",{parentName:"p"},"$HOME")," by\ndefault, and not on your working directory!"),(0,i.kt)("p",{parentName:"admonition"},"As mentioned in the previous section, the ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.USER_WORKING_DIR}}")," special\nvariable can be very handy here to run stuff on the directory you're calling\n",(0,i.kt)("inlineCode",{parentName:"p"},"task -g")," from."),(0,i.kt)("pre",{parentName:"admonition"},(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n from-home:\n cmds:\n - pwd\n\n from-working-directory:\n dir: '{{.USER_WORKING_DIR}}'\n cmds:\n - pwd\n"))),(0,i.kt)("h2",{id:"environment-variables"},"Environment variables"),(0,i.kt)("h3",{id:"task"},"Task"),(0,i.kt)("p",null,"You can use ",(0,i.kt)("inlineCode",{parentName:"p"},"env")," to set custom environment variables for a specific task:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n greet:\n cmds:\n - echo $GREETING\n env:\n GREETING: Hey, there!\n")),(0,i.kt)("p",null,"Additionally, you can set global environment variables that will be available to\nall tasks:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nenv:\n GREETING: Hey, there!\n\ntasks:\n greet:\n cmds:\n - echo $GREETING\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},(0,i.kt)("inlineCode",{parentName:"p"},"env")," supports expansion and retrieving output from a shell command just like\nvariables, as you can see in the ",(0,i.kt)("a",{parentName:"p",href:"#variables"},"Variables")," section.")),(0,i.kt)("h3",{id:"env-files"},".env files"),(0,i.kt)("p",null,"You can also ask Task to include ",(0,i.kt)("inlineCode",{parentName:"p"},".env")," like files by using the ",(0,i.kt)("inlineCode",{parentName:"p"},"dotenv:"),"\nsetting:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash",metastring:'title=".env"',title:'".env"'},"KEYNAME=VALUE\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash",metastring:'title="testing/.env"',title:'"testing/.env"'},"ENDPOINT=testing.com\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml",metastring:'title="Taskfile.yml"',title:'"Taskfile.yml"'},"version: '3'\n\nenv:\n ENV: testing\n\ndotenv: ['.env', '{{.ENV}}/.env.', '{{.HOME}}/.env']\n\ntasks:\n greet:\n cmds:\n - echo \"Using $KEYNAME and endpoint $ENDPOINT\"\n")),(0,i.kt)("p",null,"Dotenv files can also be specified at the task level:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nenv:\n ENV: testing\n\ntasks:\n greet:\n dotenv: ['.env', '{{.ENV}}/.env.', '{{.HOME}}/.env']\n cmds:\n - echo \"Using $KEYNAME and endpoint $ENDPOINT\"\n")),(0,i.kt)("p",null,"Environment variables specified explicitly at the task-level will override\nvariables defined in dotfiles:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nenv:\n ENV: testing\n\ntasks:\n greet:\n dotenv: ['.env', '{{.ENV}}/.env.', '{{.HOME}}/.env']\n env:\n KEYNAME: DIFFERENT_VALUE\n cmds:\n - echo \"Using $KEYNAME and endpoint $ENDPOINT\"\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Please note that you are not currently able to use the ",(0,i.kt)("inlineCode",{parentName:"p"},"dotenv")," key inside\nincluded Taskfiles.")),(0,i.kt)("h2",{id:"including-other-taskfiles"},"Including other Taskfiles"),(0,i.kt)("p",null,"If you want to share tasks between different projects (Taskfiles), you can use\nthe importing mechanism to include other Taskfiles using the ",(0,i.kt)("inlineCode",{parentName:"p"},"includes")," keyword:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n docs: ./documentation # will look for ./documentation/Taskfile.yml\n docker: ./DockerTasks.yml\n")),(0,i.kt)("p",null,"The tasks described in the given Taskfiles will be available with the informed\nnamespace. So, you'd call ",(0,i.kt)("inlineCode",{parentName:"p"},"task docs:serve")," to run the ",(0,i.kt)("inlineCode",{parentName:"p"},"serve")," task from\n",(0,i.kt)("inlineCode",{parentName:"p"},"documentation/Taskfile.yml")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"task docker:build")," to run the ",(0,i.kt)("inlineCode",{parentName:"p"},"build")," task from\nthe ",(0,i.kt)("inlineCode",{parentName:"p"},"DockerTasks.yml")," file."),(0,i.kt)("p",null,"Relative paths are resolved relative to the directory containing the including\nTaskfile."),(0,i.kt)("h3",{id:"os-specific-taskfiles"},"OS-specific Taskfiles"),(0,i.kt)("p",null,"With ",(0,i.kt)("inlineCode",{parentName:"p"},"version: '2'"),", task automatically includes any ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_{{OS}}.yml")," if it\nexists (for example: ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_windows.yml"),", ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_linux.yml")," or\n",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile_darwin.yml"),"). Since this behavior was a bit too implicit, it was\nremoved on version 3, but you still can have a similar behavior by explicitly\nimporting these files:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n build: ./Taskfile_{{OS}}.yml\n")),(0,i.kt)("h3",{id:"directory-of-included-taskfile"},"Directory of included Taskfile"),(0,i.kt)("p",null,"By default, included Taskfile's tasks are run in the current directory, even if\nthe Taskfile is in another directory, but you can force its tasks to run in\nanother directory by using this alternative syntax:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n docs:\n taskfile: ./docs/Taskfile.yml\n dir: ./docs\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"The included Taskfiles must be using the same schema version as the main\nTaskfile uses.")),(0,i.kt)("h3",{id:"optional-includes"},"Optional includes"),(0,i.kt)("p",null,"Includes marked as optional will allow Task to continue execution as normal if\nthe included file is missing."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n tests:\n taskfile: ./tests/Taskfile.yml\n optional: true\n\ntasks:\n greet:\n cmds:\n - echo \"This command can still be successfully executed if\n ./tests/Taskfile.yml does not exist\"\n")),(0,i.kt)("h3",{id:"internal-includes"},"Internal includes"),(0,i.kt)("p",null,"Includes marked as internal will set all the tasks of the included file to be\ninternal as well (see the ",(0,i.kt)("a",{parentName:"p",href:"#internal-tasks"},"Internal tasks")," section below). This\nis useful when including utility tasks that are not intended to be used directly\nby the user."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n tests:\n taskfile: ./taskfiles/Utils.yml\n internal: true\n")),(0,i.kt)("h3",{id:"vars-of-included-taskfiles"},"Vars of included Taskfiles"),(0,i.kt)("p",null,"You can also specify variables when including a Taskfile. This may be useful for\nhaving reusable Taskfile that can be tweaked or even included more than once:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n backend:\n taskfile: ./taskfiles/Docker.yml\n vars:\n DOCKER_IMAGE: backend_image\n\n frontend:\n taskfile: ./taskfiles/Docker.yml\n vars:\n DOCKER_IMAGE: frontend_image\n")),(0,i.kt)("h3",{id:"namespace-aliases"},"Namespace aliases"),(0,i.kt)("p",null,"When including a Taskfile, you can give the namespace a list of ",(0,i.kt)("inlineCode",{parentName:"p"},"aliases"),". This\nworks in the same way as ",(0,i.kt)("a",{parentName:"p",href:"#task-aliases"},"task aliases")," and can be used together\nto create shorter and easier-to-type commands."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nincludes:\n generate:\n taskfile: ./taskfiles/Generate.yml\n aliases: [gen]\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Vars declared in the included Taskfile have preference over the variables in the\nincluding Taskfile! If you want a variable in an included Taskfile to be\noverridable, use the\n",(0,i.kt)("a",{parentName:"p",href:"https://go-task.github.io/slim-sprig/defaults.html"},"default function"),":\n",(0,i.kt)("inlineCode",{parentName:"p"},"MY_VAR: '{{.MY_VAR | default \"my-default-value\"}}'"),".")),(0,i.kt)("h2",{id:"internal-tasks"},"Internal tasks"),(0,i.kt)("p",null,"Internal tasks are tasks that cannot be called directly by the user. They will\nnot appear in the output when running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --list|--list-all"),". Other tasks may\ncall internal tasks in the usual way. This is useful for creating reusable,\nfunction-like tasks that have no useful purpose on the command line."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-image-1:\n cmds:\n - task: build-image\n vars:\n DOCKER_IMAGE: image-1\n\n build-image:\n internal: true\n cmds:\n - docker build -t {{.DOCKER_IMAGE}} .\n")),(0,i.kt)("h2",{id:"task-directory"},"Task directory"),(0,i.kt)("p",null,"By default, tasks will be executed in the directory where the Taskfile is\nlocated. But you can easily make the task run in another folder, informing\n",(0,i.kt)("inlineCode",{parentName:"p"},"dir"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n serve:\n dir: public/www\n cmds:\n # run http server\n - caddy\n")),(0,i.kt)("p",null,"If the directory does not exist, ",(0,i.kt)("inlineCode",{parentName:"p"},"task")," creates it."),(0,i.kt)("h2",{id:"task-dependencies"},"Task dependencies"),(0,i.kt)("blockquote",null,(0,i.kt)("p",{parentName:"blockquote"},"Dependencies run in parallel, so dependencies of a task should not depend one\nanother. If you want to force tasks to run serially, take a look at the\n",(0,i.kt)("a",{parentName:"p",href:"#calling-another-task"},"Calling Another Task")," section below.")),(0,i.kt)("p",null,"You may have tasks that depend on others. Just pointing them on ",(0,i.kt)("inlineCode",{parentName:"p"},"deps")," will make\nthem run automatically before running the parent task:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n deps: [assets]\n cmds:\n - go build -v -i main.go\n\n assets:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"In the above example, ",(0,i.kt)("inlineCode",{parentName:"p"},"assets")," will always run right before ",(0,i.kt)("inlineCode",{parentName:"p"},"build")," if you run\n",(0,i.kt)("inlineCode",{parentName:"p"},"task build"),"."),(0,i.kt)("p",null,"A task can have only dependencies and no commands to group tasks together:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n assets:\n deps: [js, css]\n\n js:\n cmds:\n - esbuild --bundle --minify js/index.js > public/bundle.js\n\n css:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"If there is more than one dependency, they always run in parallel for better\nperformance."),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"You can also make the tasks given by the command line run in parallel by using\nthe ",(0,i.kt)("inlineCode",{parentName:"p"},"--parallel")," flag (alias ",(0,i.kt)("inlineCode",{parentName:"p"},"-p"),"). Example: ",(0,i.kt)("inlineCode",{parentName:"p"},"task --parallel js css"),".")),(0,i.kt)("p",null,"If you want to pass information to dependencies, you can do that the same manner\nas you would to ",(0,i.kt)("a",{parentName:"p",href:"#calling-another-task"},"call another task"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n deps:\n - task: echo_sth\n vars: { TEXT: 'before 1' }\n - task: echo_sth\n vars: { TEXT: 'before 2' }\n silent: true\n cmds:\n - echo \"after\"\n\n echo_sth:\n cmds:\n - echo {{.TEXT}}\n")),(0,i.kt)("h2",{id:"platform-specific-tasks-and-commands"},"Platform specific tasks and commands"),(0,i.kt)("p",null,"If you want to restrict the running of tasks to explicit platforms, this can be\nachieved using the ",(0,i.kt)("inlineCode",{parentName:"p"},"platforms:")," key. Tasks can be restricted to a specific OS,\narchitecture or a combination of both. On a mismatch, the task or command will\nbe skipped, and no error will be thrown."),(0,i.kt)("p",null,"The values allowed as OS or Arch are valid ",(0,i.kt)("inlineCode",{parentName:"p"},"GOOS")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"GOARCH")," values, as\ndefined by the Go language\n",(0,i.kt)("a",{parentName:"p",href:"https://github.com/golang/go/blob/master/src/go/build/syslist.go"},"here"),"."),(0,i.kt)("p",null,"The ",(0,i.kt)("inlineCode",{parentName:"p"},"build-windows")," task below will run only on Windows, and on any\narchitecture:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-windows:\n platforms: [windows]\n cmds:\n - echo 'Running command on Windows'\n")),(0,i.kt)("p",null,"This can be restricted to a specific architecture as follows:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-windows-amd64:\n platforms: [windows/amd64]\n cmds:\n - echo 'Running command on Windows (amd64)'\n")),(0,i.kt)("p",null,"It is also possible to restrict the task to specific architectures:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build-amd64:\n platforms: [amd64]\n cmds:\n - echo 'Running command on amd64'\n")),(0,i.kt)("p",null,"Multiple platforms can be specified as follows:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n platforms: [windows/amd64, darwin]\n cmds:\n - echo 'Running command on Windows (amd64) and macOS'\n")),(0,i.kt)("p",null,"Individual commands can also be restricted to specific platforms:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - cmd: echo 'Running command on Windows (amd64) and macOS'\n platforms: [windows/amd64, darwin]\n - cmd: echo 'Running on all platforms'\n")),(0,i.kt)("h2",{id:"calling-another-task"},"Calling another task"),(0,i.kt)("p",null,"When a task has many dependencies, they are executed concurrently. This will\noften result in a faster build pipeline. However, in some situations, you may\nneed to call other tasks serially. In this case, use the following syntax:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},'version: \'3\'\n\ntasks:\n main-task:\n cmds:\n - task: task-to-be-called\n - task: another-task\n - echo "Both done"\n\n task-to-be-called:\n cmds:\n - echo "Task to be called"\n\n another-task:\n cmds:\n - echo "Another task"\n')),(0,i.kt)("p",null,"Using the ",(0,i.kt)("inlineCode",{parentName:"p"},"vars")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"silent")," attributes you can choose to pass variables and\ntoggle ",(0,i.kt)("a",{parentName:"p",href:"#silent-mode"},"silent mode")," on a call-by-call basis:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n greet:\n vars:\n RECIPIENT: '{{default \"World\" .RECIPIENT}}'\n cmds:\n - echo \"Hello, {{.RECIPIENT}}!\"\n\n greet-pessimistically:\n cmds:\n - task: greet\n vars: { RECIPIENT: 'Cruel World' }\n silent: true\n")),(0,i.kt)("p",null,"The above syntax is also supported in ",(0,i.kt)("inlineCode",{parentName:"p"},"deps"),"."),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"NOTE: If you want to call a task declared in the root Taskfile from within an\n",(0,i.kt)("a",{parentName:"p",href:"#including-other-taskfiles"},"included Taskfile"),", add a leading ",(0,i.kt)("inlineCode",{parentName:"p"},":")," like this:\n",(0,i.kt)("inlineCode",{parentName:"p"},"task: :task-name"),".")),(0,i.kt)("h2",{id:"prevent-unnecessary-work"},"Prevent unnecessary work"),(0,i.kt)("h3",{id:"by-fingerprinting-locally-generated-files-and-their-sources"},"By fingerprinting locally generated files and their sources"),(0,i.kt)("p",null,"If a task generates something, you can inform Task the source and generated\nfiles, so Task will prevent running them if not necessary."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n deps: [js, css]\n cmds:\n - go build -v -i main.go\n\n js:\n cmds:\n - esbuild --bundle --minify js/index.js > public/bundle.js\n sources:\n - src/js/**/*.js\n generates:\n - public/bundle.js\n\n css:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n sources:\n - src/css/**/*.css\n generates:\n - public/bundle.css\n")),(0,i.kt)("p",null,(0,i.kt)("inlineCode",{parentName:"p"},"sources")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"generates")," can be files or file patterns. When given, Task will\ncompare the checksum of the source files to determine if it's necessary to run\nthe task. If not, it will just print a message like ",(0,i.kt)("inlineCode",{parentName:"p"},'Task "js" is up to date'),"."),(0,i.kt)("p",null,"If you prefer this check to be made by the modification timestamp of the files,\ninstead of its checksum (content), just set the ",(0,i.kt)("inlineCode",{parentName:"p"},"method")," property to\n",(0,i.kt)("inlineCode",{parentName:"p"},"timestamp"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - go build .\n sources:\n - ./*.go\n generates:\n - app{{exeExt}}\n method: timestamp\n")),(0,i.kt)("p",null,"In situations where you need more flexibility the ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," keyword can be used.\nYou can even combine the two. See the documentation for\n",(0,i.kt)("a",{parentName:"p",href:"#using-programmatic-checks-to-indicate-a-task-is-up-to-date"},"status")," for an\nexample."),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"By default, task stores checksums on a local ",(0,i.kt)("inlineCode",{parentName:"p"},".task")," directory in the project's\ndirectory. Most of the time, you'll want to have this directory on ",(0,i.kt)("inlineCode",{parentName:"p"},".gitignore"),"\n(or equivalent) so it isn't committed. (If you have a task for code generation\nthat is committed it may make sense to commit the checksum of that task as well,\nthough)."),(0,i.kt)("p",{parentName:"admonition"},"If you want these files to be stored in another directory, you can set a\n",(0,i.kt)("inlineCode",{parentName:"p"},"TASK_TEMP_DIR")," environment variable in your machine. It can contain a relative\npath like ",(0,i.kt)("inlineCode",{parentName:"p"},"tmp/task")," that will be interpreted as relative to the project\ndirectory, or an absolute or home path like ",(0,i.kt)("inlineCode",{parentName:"p"},"/tmp/.task")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"~/.task"),"\n(subdirectories will be created for each project)."),(0,i.kt)("pre",{parentName:"admonition"},(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"export TASK_TEMP_DIR='~/.task'\n"))),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Each task has only one checksum stored for its ",(0,i.kt)("inlineCode",{parentName:"p"},"sources"),". If you want to\ndistinguish a task by any of its input variables, you can add those variables as\npart of the task's label, and it will be considered a different task."),(0,i.kt)("p",{parentName:"admonition"},"This is useful if you want to run a task once for each distinct set of inputs\nuntil the sources actually change. For example, if the sources depend on the\nvalue of a variable, or you if you want the task to rerun if some arguments\nchange even if the source has not.")),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"The method ",(0,i.kt)("inlineCode",{parentName:"p"},"none")," skips any validation and always run the task.")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"For the ",(0,i.kt)("inlineCode",{parentName:"p"},"checksum")," (default) or ",(0,i.kt)("inlineCode",{parentName:"p"},"timestamp")," method to work, it is only necessary\nto inform the source files. When the ",(0,i.kt)("inlineCode",{parentName:"p"},"timestamp")," method is used, the last time\nof the running the task is considered as a generate.")),(0,i.kt)("h3",{id:"using-programmatic-checks-to-indicate-a-task-is-up-to-date"},"Using programmatic checks to indicate a task is up to date"),(0,i.kt)("p",null,"Alternatively, you can inform a sequence of tests as ",(0,i.kt)("inlineCode",{parentName:"p"},"status"),". If no error is\nreturned (exit status 0), the task is considered up-to-date:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n generate-files:\n cmds:\n - mkdir directory\n - touch directory/file1.txt\n - touch directory/file2.txt\n # test existence of files\n status:\n - test -d directory\n - test -f directory/file1.txt\n - test -f directory/file2.txt\n")),(0,i.kt)("p",null,"Normally, you would use ",(0,i.kt)("inlineCode",{parentName:"p"},"sources")," in combination with ",(0,i.kt)("inlineCode",{parentName:"p"},"generates")," - but for\ntasks that generate remote artifacts (Docker images, deploys, CD releases) the\nchecksum source and timestamps require either access to the artifact or for an\nout-of-band refresh of the ",(0,i.kt)("inlineCode",{parentName:"p"},".checksum")," fingerprint file."),(0,i.kt)("p",null,"Two special variables ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.CHECKSUM}}")," and ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.TIMESTAMP}}")," are available for\ninterpolation within ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," commands, depending on the method assigned to\nfingerprint the sources. Only ",(0,i.kt)("inlineCode",{parentName:"p"},"source")," globs are fingerprinted."),(0,i.kt)("p",null,"Note that the ",(0,i.kt)("inlineCode",{parentName:"p"},"{{.TIMESTAMP}}"),' variable is a "live" Go ',(0,i.kt)("inlineCode",{parentName:"p"},"time.Time")," struct, and\ncan be formatted using any of the methods that ",(0,i.kt)("inlineCode",{parentName:"p"},"time.Time")," responds to."),(0,i.kt)("p",null,"See ",(0,i.kt)("a",{parentName:"p",href:"https://golang.org/pkg/time/"},"the Go Time documentation")," for more\ninformation."),(0,i.kt)("p",null,"You can use ",(0,i.kt)("inlineCode",{parentName:"p"},"--force")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"-f")," if you want to force a task to run even when\nup-to-date."),(0,i.kt)("p",null,"Also, ",(0,i.kt)("inlineCode",{parentName:"p"},"task --status [tasks]...")," will exit with a non-zero exit code if any of\nthe tasks are not up-to-date."),(0,i.kt)("p",null,(0,i.kt)("inlineCode",{parentName:"p"},"status")," can be combined with the\n",(0,i.kt)("a",{parentName:"p",href:"#by-fingerprinting-locally-generated-files-and-their-sources"},"fingerprinting"),"\nto have a task run if either the the source/generated artifacts changes, or the\nprogrammatic check fails:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:prod:\n desc: Build for production usage.\n cmds:\n - composer install\n # Run this task if source files changes.\n sources:\n - composer.json\n - composer.lock\n generates:\n - ./vendor/composer/installed.json\n - ./vendor/autoload.php\n # But also run the task if the last build was not a production build.\n status:\n - grep -q '\"dev\": false' ./vendor/composer/installed.json\n")),(0,i.kt)("h3",{id:"using-programmatic-checks-to-cancel-the-execution-of-a-task-and-its-dependencies"},"Using programmatic checks to cancel the execution of a task and its dependencies"),(0,i.kt)("p",null,"In addition to ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," checks, ",(0,i.kt)("inlineCode",{parentName:"p"},"preconditions")," checks are the logical inverse\nof ",(0,i.kt)("inlineCode",{parentName:"p"},"status")," checks. That is, if you need a certain set of conditions to be\n",(0,i.kt)("em",{parentName:"p"},"true")," you can use the ",(0,i.kt)("inlineCode",{parentName:"p"},"preconditions")," stanza. ",(0,i.kt)("inlineCode",{parentName:"p"},"preconditions")," are similar to\n",(0,i.kt)("inlineCode",{parentName:"p"},"status")," lines, except they support ",(0,i.kt)("inlineCode",{parentName:"p"},"sh")," expansion, and they SHOULD all\nreturn 0."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n generate-files:\n cmds:\n - mkdir directory\n - touch directory/file1.txt\n - touch directory/file2.txt\n # test existence of files\n preconditions:\n - test -f .env\n - sh: '[ 1 = 0 ]'\n msg: \"One doesn't equal Zero, Halting\"\n")),(0,i.kt)("p",null,"Preconditions can set specific failure messages that can tell a user what steps\nto take using the ",(0,i.kt)("inlineCode",{parentName:"p"},"msg")," field."),(0,i.kt)("p",null,"If a task has a dependency on a sub-task with a precondition, and that\nprecondition is not met - the calling task will fail. Note that a task executed\nwith a failing precondition will not run unless ",(0,i.kt)("inlineCode",{parentName:"p"},"--force")," is given."),(0,i.kt)("p",null,"Unlike ",(0,i.kt)("inlineCode",{parentName:"p"},"status"),", which will skip a task if it is up to date and continue\nexecuting tasks that depend on it, a ",(0,i.kt)("inlineCode",{parentName:"p"},"precondition")," will fail a task, along with\nany other tasks that depend on it."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n task-will-fail:\n preconditions:\n - sh: 'exit 1'\n\n task-will-also-fail:\n deps:\n - task-will-fail\n\n task-will-still-fail:\n cmds:\n - task: task-will-fail\n - echo \"I will not run\"\n")),(0,i.kt)("h3",{id:"limiting-when-tasks-run"},"Limiting when tasks run"),(0,i.kt)("p",null,"If a task executed by multiple ",(0,i.kt)("inlineCode",{parentName:"p"},"cmds")," or multiple ",(0,i.kt)("inlineCode",{parentName:"p"},"deps")," you can control when it\nis executed using ",(0,i.kt)("inlineCode",{parentName:"p"},"run"),". ",(0,i.kt)("inlineCode",{parentName:"p"},"run")," can also be set at the root of the Taskfile to\nchange the behavior of all the tasks unless explicitly overridden."),(0,i.kt)("p",null,"Supported values for ",(0,i.kt)("inlineCode",{parentName:"p"},"run"),":"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"always")," (default) always attempt to invoke the task regardless of the number\nof previous executions"),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"once")," only invoke this task once regardless of the number of references"),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"when_changed")," only invokes the task once for each unique set of variables\npassed into the task")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - task: generate-file\n vars: { CONTENT: '1' }\n - task: generate-file\n vars: { CONTENT: '2' }\n - task: generate-file\n vars: { CONTENT: '2' }\n\n generate-file:\n run: when_changed\n deps:\n - install-deps\n cmds:\n - echo {{.CONTENT}}\n\n install-deps:\n run: once\n cmds:\n - sleep 5 # long operation like installing packages\n")),(0,i.kt)("h2",{id:"variables"},"Variables"),(0,i.kt)("p",null,"When doing interpolation of variables, Task will look for the below. They are\nlisted below in order of importance (i.e. most important first):"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Variables declared in the task definition"),(0,i.kt)("li",{parentName:"ul"},"Variables given while calling a task from another (See\n",(0,i.kt)("a",{parentName:"li",href:"#calling-another-task"},"Calling another task")," above)"),(0,i.kt)("li",{parentName:"ul"},"Variables of the ",(0,i.kt)("a",{parentName:"li",href:"#including-other-taskfiles"},"included Taskfile")," (when the\ntask is included)"),(0,i.kt)("li",{parentName:"ul"},"Variables of the ",(0,i.kt)("a",{parentName:"li",href:"#vars-of-included-taskfiles"},"inclusion of the Taskfile"),"\n(when the task is included)"),(0,i.kt)("li",{parentName:"ul"},"Global variables (those declared in the ",(0,i.kt)("inlineCode",{parentName:"li"},"vars:")," option in the Taskfile)"),(0,i.kt)("li",{parentName:"ul"},"Environment variables")),(0,i.kt)("p",null,"Example of sending parameters with environment variables:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"$ TASK_VARIABLE=a-value task do-something\n")),(0,i.kt)("admonition",{type:"tip"},(0,i.kt)("p",{parentName:"admonition"},"A special variable ",(0,i.kt)("inlineCode",{parentName:"p"},".TASK")," is always available containing the task name.")),(0,i.kt)("p",null,"Since some shells do not support the above syntax to set environment variables\n(Windows) tasks also accept a similar style when not at the beginning of the\ncommand."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},'$ task write-file FILE=file.txt "CONTENT=Hello, World!" print "MESSAGE=All done!"\n')),(0,i.kt)("p",null,"Example of locally declared vars:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n print-var:\n cmds:\n - echo \"{{.VAR}}\"\n vars:\n VAR: Hello!\n")),(0,i.kt)("p",null,"Example of global vars in a ",(0,i.kt)("inlineCode",{parentName:"p"},"Taskfile.yml"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nvars:\n GREETING: Hello from Taskfile!\n\ntasks:\n greet:\n cmds:\n - echo \"{{.GREETING}}\"\n")),(0,i.kt)("h3",{id:"dynamic-variables"},"Dynamic variables"),(0,i.kt)("p",null,"The below syntax (",(0,i.kt)("inlineCode",{parentName:"p"},"sh:")," prop in a variable) is considered a dynamic variable.\nThe value will be treated as a command and the output assigned. If there are one\nor more trailing newlines, the last newline will be trimmed."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n cmds:\n - go build -ldflags=\"-X main.Version={{.GIT_COMMIT}}\" main.go\n vars:\n GIT_COMMIT:\n sh: git log -n 1 --format=%h\n")),(0,i.kt)("p",null,"This works for all types of variables."),(0,i.kt)("h2",{id:"forwarding-cli-arguments-to-commands"},"Forwarding CLI arguments to commands"),(0,i.kt)("p",null,"If ",(0,i.kt)("inlineCode",{parentName:"p"},"--")," is given in the CLI, all following parameters are added to a special\n",(0,i.kt)("inlineCode",{parentName:"p"},".CLI_ARGS")," variable. This is useful to forward arguments to another command."),(0,i.kt)("p",null,"The below example will run ",(0,i.kt)("inlineCode",{parentName:"p"},"yarn install"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"$ task yarn -- install\n")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n yarn:\n cmds:\n - yarn {{.CLI_ARGS}}\n")),(0,i.kt)("h2",{id:"doing-task-cleanup-with-defer"},"Doing task cleanup with ",(0,i.kt)("inlineCode",{parentName:"h2"},"defer")),(0,i.kt)("p",null,"With the ",(0,i.kt)("inlineCode",{parentName:"p"},"defer")," keyword, it's possible to schedule cleanup to be run once the\ntask finishes. The difference with just putting it as the last command is that\nthis command will run even when the task fails."),(0,i.kt)("p",null,"In the example below, ",(0,i.kt)("inlineCode",{parentName:"p"},"rm -rf tmpdir/")," will run even if the third command fails:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - mkdir -p tmpdir/\n - defer: rm -rf tmpdir/\n - echo 'Do work on tmpdir/'\n")),(0,i.kt)("p",null,"If you want to move the cleanup command into another task, that is possible as\nwell:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n cmds:\n - mkdir -p tmpdir/\n - defer: { task: cleanup }\n - echo 'Do work on tmpdir/'\n\n cleanup: rm -rf tmpdir/\n")),(0,i.kt)("admonition",{type:"info"},(0,i.kt)("p",{parentName:"admonition"},"Due to the nature of how the\n",(0,i.kt)("a",{parentName:"p",href:"https://go.dev/tour/flowcontrol/13"},"Go's own ",(0,i.kt)("inlineCode",{parentName:"a"},"defer")," work"),", the deferred\ncommands are executed in the reverse order if you schedule multiple of them.")),(0,i.kt)("h2",{id:"gos-template-engine"},"Go's template engine"),(0,i.kt)("p",null,"Task parse commands as ",(0,i.kt)("a",{parentName:"p",href:"https://golang.org/pkg/text/template/"},"Go's template engine")," before executing them.\nVariables are accessible through dot syntax (",(0,i.kt)("inlineCode",{parentName:"p"},".VARNAME"),")."),(0,i.kt)("p",null,"All functions by the Go's\n",(0,i.kt)("a",{parentName:"p",href:"https://go-task.github.io/slim-sprig/"},"slim-sprig lib")," are available. The\nfollowing example gets the current date in a given format:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n print-date:\n cmds:\n - echo {{now | date \"2006-01-02\"}}\n")),(0,i.kt)("p",null,"Task also adds the following functions:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"OS"),': Returns the operating system. Possible values are "windows", "linux",\n"darwin" (macOS) and "freebsd".'),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"ARCH"),': return the architecture Task was compiled to: "386", "amd64", "arm" or\n"s390x".'),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"splitLines"),": Splits Unix (\\n) and Windows (\\r\\n) styled newlines."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"catLines"),": Replaces Unix (\\n) and Windows (\\r\\n) styled newlines with a\nspace."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"toSlash"),": Does nothing on Unix, but on Windows converts a string from ",(0,i.kt)("inlineCode",{parentName:"li"},"\\"),"\npath format to ",(0,i.kt)("inlineCode",{parentName:"li"},"/"),"."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"fromSlash"),": Opposite of ",(0,i.kt)("inlineCode",{parentName:"li"},"toSlash"),". Does nothing on Unix, but on Windows\nconverts a string from ",(0,i.kt)("inlineCode",{parentName:"li"},"/")," path format to ",(0,i.kt)("inlineCode",{parentName:"li"},"\\"),"."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"exeExt"),": Returns the right executable extension for the current OS (",(0,i.kt)("inlineCode",{parentName:"li"},'".exe"'),"\nfor Windows, ",(0,i.kt)("inlineCode",{parentName:"li"},'""')," for others)."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"shellQuote"),": Quotes a string to make it safe for use in shell scripts. Task\nuses ",(0,i.kt)("a",{parentName:"li",href:"https://pkg.go.dev/mvdan.cc/sh/v3@v3.4.0/syntax#Quote"},"this Go function"),"\nfor this. The Bash dialect is assumed."),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"splitArgs"),": Splits a string as if it were a command's arguments. Task uses\n",(0,i.kt)("a",{parentName:"li",href:"https://pkg.go.dev/mvdan.cc/sh/v3@v3.4.0/shell#Fields"},"this Go function"))),(0,i.kt)("p",null,"Example:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n print-os:\n cmds:\n - echo '{{OS}} {{ARCH}}'\n - echo '{{if eq OS \"windows\"}}windows-command{{else}}unix-command{{end}}'\n # This will be path/to/file on Unix but path\\to\\file on Windows\n - echo '{{fromSlash \"path/to/file\"}}'\n enumerated-file:\n vars:\n CONTENT: |\n foo\n bar\n cmds:\n - |\n cat << EOF > output.txt\n {{range $i, $line := .CONTENT | splitLines -}}\n {{printf \"%3d\" $i}}: {{$line}}\n {{end}}EOF\n")),(0,i.kt)("h2",{id:"help"},"Help"),(0,i.kt)("p",null,"Running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --list")," (or ",(0,i.kt)("inlineCode",{parentName:"p"},"task -l"),") lists all tasks with a description. The\nfollowing Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n build:\n desc: Build the go binary.\n cmds:\n - go build -v -i main.go\n\n test:\n desc: Run all the go tests.\n cmds:\n - go test -race ./...\n\n js:\n cmds:\n - esbuild --bundle --minify js/index.js > public/bundle.js\n\n css:\n cmds:\n - esbuild --bundle --minify css/index.css > public/bundle.css\n")),(0,i.kt)("p",null,"would print the following output:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-bash"},"* build: Build the go binary.\n* test: Run all the go tests.\n")),(0,i.kt)("p",null,"If you want to see all tasks, there's a ",(0,i.kt)("inlineCode",{parentName:"p"},"--list-all")," (alias ",(0,i.kt)("inlineCode",{parentName:"p"},"-a"),") flag as well."),(0,i.kt)("h2",{id:"display-summary-of-task"},"Display summary of task"),(0,i.kt)("p",null,"Running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --summary task-name")," will show a summary of a task. The following\nTaskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n release:\n deps: [build]\n summary: |\n Release your project to github\n\n It will build your project before starting the release.\n Please make sure that you have set GITHUB_TOKEN before starting.\n cmds:\n - your-release-tool\n\n build:\n cmds:\n - your-build-tool\n")),(0,i.kt)("p",null,"with running ",(0,i.kt)("inlineCode",{parentName:"p"},"task --summary release")," would print the following output:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre"},"task: release\n\nRelease your project to github\n\nIt will build your project before starting the release.\nPlease make sure that you have set GITHUB_TOKEN before starting.\n\ndependencies:\n - build\n\ncommands:\n - your-release-tool\n")),(0,i.kt)("p",null,"If a summary is missing, the description will be printed. If the task does not\nhave a summary or a description, a warning is printed."),(0,i.kt)("p",null,"Please note: ",(0,i.kt)("em",{parentName:"p"},"showing the summary will not execute the command"),"."),(0,i.kt)("h2",{id:"task-aliases"},"Task aliases"),(0,i.kt)("p",null,"Aliases are alternative names for tasks. They can be used to make it easier and\nquicker to run tasks with long or hard-to-type names. You can use them on the\ncommand line, when ",(0,i.kt)("a",{parentName:"p",href:"#calling-another-task"},"calling sub-tasks")," in your Taskfile\nand when ",(0,i.kt)("a",{parentName:"p",href:"#including-other-taskfiles"},"including tasks")," with aliases from another\nTaskfile. They can also be used together with\n",(0,i.kt)("a",{parentName:"p",href:"#namespace-aliases"},"namespace aliases"),"."),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n generate:\n aliases: [gen]\n cmds:\n - task: gen-mocks\n\n generate-mocks:\n aliases: [gen-mocks]\n cmds:\n - echo \"generating...\"\n")),(0,i.kt)("h2",{id:"overriding-task-name"},"Overriding task name"),(0,i.kt)("p",null,"Sometimes you may want to override the task name printed on the summary,\nup-to-date messages to STDOUT, etc. In this case, you can just set ",(0,i.kt)("inlineCode",{parentName:"p"},"label:"),",\nwhich can also be interpolated with variables:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n default:\n - task: print\n vars:\n MESSAGE: hello\n - task: print\n vars:\n MESSAGE: world\n\n print:\n label: 'print-{{.MESSAGE}}'\n cmds:\n - echo \"{{.MESSAGE}}\"\n")),(0,i.kt)("h2",{id:"silent-mode"},"Silent mode"),(0,i.kt)("p",null,"Silent mode disables the echoing of commands before Task runs it. For the\nfollowing Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - echo \"Print something\"\n")),(0,i.kt)("p",null,"Normally this will be printed:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-sh"},'echo "Print something"\nPrint something\n')),(0,i.kt)("p",null,"With silent mode on, the below will be printed instead:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-sh"},"Print something\n")),(0,i.kt)("p",null,"There are four ways to enable silent mode:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"At command level:")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - cmd: echo \"Print something\"\n silent: true\n")),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"At task level:")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - echo \"Print something\"\n silent: true\n")),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Globally at Taskfile level:")),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\nsilent: true\n\ntasks:\n echo:\n cmds:\n - echo \"Print something\"\n")),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},"Or globally with ",(0,i.kt)("inlineCode",{parentName:"li"},"--silent")," or ",(0,i.kt)("inlineCode",{parentName:"li"},"-s")," flag")),(0,i.kt)("p",null,"If you want to suppress STDOUT instead, just redirect a command to ",(0,i.kt)("inlineCode",{parentName:"p"},"/dev/null"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - echo \"This will print nothing\" > /dev/null\n")),(0,i.kt)("h2",{id:"dry-run-mode"},"Dry run mode"),(0,i.kt)("p",null,"Dry run mode (",(0,i.kt)("inlineCode",{parentName:"p"},"--dry"),") compiles and steps through each task, printing the\ncommands that would be run without executing them. This is useful for debugging\nyour Taskfiles."),(0,i.kt)("h2",{id:"ignore-errors"},"Ignore errors"),(0,i.kt)("p",null,"You have the option to ignore errors during command execution. Given the\nfollowing Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - exit 1\n - echo \"Hello World\"\n")),(0,i.kt)("p",null,"Task will abort the execution after running ",(0,i.kt)("inlineCode",{parentName:"p"},"exit 1")," because the status code ",(0,i.kt)("inlineCode",{parentName:"p"},"1"),"\nstands for ",(0,i.kt)("inlineCode",{parentName:"p"},"EXIT_FAILURE"),". However, it is possible to continue with execution\nusing ",(0,i.kt)("inlineCode",{parentName:"p"},"ignore_error"),":"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\ntasks:\n echo:\n cmds:\n - cmd: exit 1\n ignore_error: true\n - echo \"Hello World\"\n")),(0,i.kt)("p",null,(0,i.kt)("inlineCode",{parentName:"p"},"ignore_error")," can also be set for a task, which means errors will be suppressed\nfor all commands. Nevertheless, keep in mind that this option will not propagate\nto other tasks called either by ",(0,i.kt)("inlineCode",{parentName:"p"},"deps")," or ",(0,i.kt)("inlineCode",{parentName:"p"},"cmds"),"!"),(0,i.kt)("h2",{id:"output-syntax"},"Output syntax"),(0,i.kt)("p",null,"By default, Task just redirects the STDOUT and STDERR of the running commands to\nthe shell in real-time. This is good for having live feedback for logging\nprinted by commands, but the output can become messy if you have multiple\ncommands running simultaneously and printing lots of stuff."),(0,i.kt)("p",null,"To make this more customizable, there are currently three different output\noptions you can choose:"),(0,i.kt)("ul",null,(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"interleaved")," (default)"),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"group")),(0,i.kt)("li",{parentName:"ul"},(0,i.kt)("inlineCode",{parentName:"li"},"prefixed"))),(0,i.kt)("p",null,"To choose another one, just set it to root in the Taskfile:"),(0,i.kt)("pre",null,(0,i.kt)("code",{parentName:"pre",className:"language-yaml"},"version: '3'\n\noutput: 'group'\n\ntasks:\n # ...\n")),(0,i.kt)("p",null,"The ",(0,i.kt)("inlineCode",{parentName:"p"},"group")," output will print the entire output of a command once after it\nfinishes, so you will not have live feedback for commands that take a long time\nto run."),(0,i.kt)("p",null,"When using the ",(0,i.kt)("inlineCode",{parentName:"p"},"group")," output, you can optionally provide a templated message to\nprint at the start and end of the group. 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