mirror of
https://github.com/go-task/task.git
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294 lines
6.5 KiB
Go
294 lines
6.5 KiB
Go
package task
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import (
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"context"
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"fmt"
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"github.com/go-task/task/v2/internal/summary"
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"io"
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"os"
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"sync/atomic"
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"github.com/go-task/task/v2/internal/compiler"
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compilerv1 "github.com/go-task/task/v2/internal/compiler/v1"
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compilerv2 "github.com/go-task/task/v2/internal/compiler/v2"
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"github.com/go-task/task/v2/internal/execext"
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"github.com/go-task/task/v2/internal/logger"
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"github.com/go-task/task/v2/internal/output"
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"github.com/go-task/task/v2/internal/taskfile"
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"github.com/go-task/task/v2/internal/taskfile/read"
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"github.com/go-task/task/v2/internal/taskfile/version"
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"github.com/Masterminds/semver"
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"golang.org/x/sync/errgroup"
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)
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const (
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// MaximumTaskCall is the max number of times a task can be called.
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// This exists to prevent infinite loops on cyclic dependencies
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MaximumTaskCall = 100
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)
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// Executor executes a Taskfile
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type Executor struct {
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Taskfile *taskfile.Taskfile
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Dir string
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Force bool
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Watch bool
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Verbose bool
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Silent bool
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Dry bool
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Summary bool
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Stdin io.Reader
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Stdout io.Writer
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Stderr io.Writer
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Logger *logger.Logger
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Compiler compiler.Compiler
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Output output.Output
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OutputStyle string
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taskvars taskfile.Vars
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taskCallCount map[string]*int32
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}
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// Run runs Task
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func (e *Executor) Run(ctx context.Context, calls ...taskfile.Call) error {
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// check if given tasks exist
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for _, c := range calls {
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if _, ok := e.Taskfile.Tasks[c.Task]; !ok {
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// FIXME: move to the main package
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e.PrintTasksHelp()
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return &taskNotFoundError{taskName: c.Task}
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}
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}
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if e.Summary {
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firstTask := calls[0].Task
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e.printTaskSummary(firstTask)
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return nil
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}
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if e.Watch {
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return e.watchTasks(calls...)
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}
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for _, c := range calls {
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if err := e.RunTask(ctx, c); err != nil {
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return err
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}
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}
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return nil
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}
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func (e *Executor) printTaskSummary(task string) {
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t := e.Taskfile.Tasks[task]
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if t.Summary == "" {
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e.Logger.Errf("task: There is no summary for task: %s", task)
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return
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}
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summary.Print(e.Logger, t)
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}
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// Setup setups Executor's internal state
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func (e *Executor) Setup() error {
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var err error
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e.Taskfile, err = read.Taskfile(e.Dir)
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if err != nil {
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return err
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}
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e.taskvars, err = read.Taskvars(e.Dir)
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if err != nil {
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return err
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}
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v, err := semver.NewConstraint(e.Taskfile.Version)
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if err != nil {
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return fmt.Errorf(`task: could not parse taskfile version "%s": %v`, e.Taskfile.Version, err)
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}
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if e.Stdin == nil {
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e.Stdin = os.Stdin
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}
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if e.Stdout == nil {
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e.Stdout = os.Stdout
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}
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if e.Stderr == nil {
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e.Stderr = os.Stderr
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}
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e.Logger = &logger.Logger{
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Stdout: e.Stdout,
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Stderr: e.Stderr,
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Verbose: e.Verbose,
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}
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switch {
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case version.IsV1(v):
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e.Compiler = &compilerv1.CompilerV1{
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Dir: e.Dir,
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Vars: e.taskvars,
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Logger: e.Logger,
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}
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case version.IsV2(v), version.IsV21(v), version.IsV22(v):
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e.Compiler = &compilerv2.CompilerV2{
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Dir: e.Dir,
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Taskvars: e.taskvars,
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TaskfileVars: e.Taskfile.Vars,
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Expansions: e.Taskfile.Expansions,
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Logger: e.Logger,
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}
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case version.IsV23(v):
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return fmt.Errorf(`task: Taskfile versions greater than v2.3 not implemented in the version of Task`)
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}
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if !version.IsV21(v) && e.Taskfile.Output != "" {
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return fmt.Errorf(`task: Taskfile option "output" is only available starting on Taskfile version v2.1`)
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}
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if !version.IsV22(v) && len(e.Taskfile.Includes) > 0 {
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return fmt.Errorf(`task: Including Taskfiles is only available starting on Taskfile version v2.2`)
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}
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if e.OutputStyle != "" {
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e.Taskfile.Output = e.OutputStyle
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}
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switch e.Taskfile.Output {
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case "", "interleaved":
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e.Output = output.Interleaved{}
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case "group":
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e.Output = output.Group{}
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case "prefixed":
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e.Output = output.Prefixed{}
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default:
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return fmt.Errorf(`task: output option "%s" not recognized`, e.Taskfile.Output)
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}
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if !version.IsV21(v) {
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err := fmt.Errorf(`task: Taskfile option "ignore_error" is only available starting on Taskfile version v2.1`)
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for _, task := range e.Taskfile.Tasks {
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if task.IgnoreError {
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return err
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}
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for _, cmd := range task.Cmds {
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if cmd.IgnoreError {
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return err
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}
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}
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}
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}
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e.taskCallCount = make(map[string]*int32, len(e.Taskfile.Tasks))
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for k := range e.Taskfile.Tasks {
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e.taskCallCount[k] = new(int32)
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}
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return nil
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}
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// RunTask runs a task by its name
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func (e *Executor) RunTask(ctx context.Context, call taskfile.Call) error {
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t, err := e.CompiledTask(call)
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if err != nil {
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return err
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}
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if !e.Watch && atomic.AddInt32(e.taskCallCount[call.Task], 1) >= MaximumTaskCall {
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return &MaximumTaskCallExceededError{task: call.Task}
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}
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if err := e.runDeps(ctx, t); err != nil {
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return err
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}
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if !e.Force {
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upToDate, err := e.isTaskUpToDate(ctx, t)
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if err != nil {
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return err
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}
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if upToDate {
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if !e.Silent {
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e.Logger.Errf(`task: Task "%s" is up to date`, t.Task)
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}
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return nil
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}
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}
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for i := range t.Cmds {
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if err := e.runCommand(ctx, t, call, i); err != nil {
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if err2 := e.statusOnError(t); err2 != nil {
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e.Logger.VerboseErrf("task: error cleaning status on error: %v", err2)
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}
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if execext.IsExitError(err) && t.IgnoreError {
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e.Logger.VerboseErrf("task: task error ignored: %v", err)
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continue
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}
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return &taskRunError{t.Task, err}
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}
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}
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return nil
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}
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func (e *Executor) runDeps(ctx context.Context, t *taskfile.Task) error {
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g, ctx := errgroup.WithContext(ctx)
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for _, d := range t.Deps {
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d := d
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g.Go(func() error {
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return e.RunTask(ctx, taskfile.Call{Task: d.Task, Vars: d.Vars})
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})
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}
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return g.Wait()
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}
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func (e *Executor) runCommand(ctx context.Context, t *taskfile.Task, call taskfile.Call, i int) error {
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cmd := t.Cmds[i]
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switch {
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case cmd.Task != "":
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return e.RunTask(ctx, taskfile.Call{Task: cmd.Task, Vars: cmd.Vars})
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case cmd.Cmd != "":
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if e.Verbose || (!cmd.Silent && !t.Silent && !e.Silent) {
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e.Logger.Errf(cmd.Cmd)
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}
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if e.Dry {
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return nil
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}
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stdOut := e.Output.WrapWriter(e.Stdout, t.Prefix)
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stdErr := e.Output.WrapWriter(e.Stderr, t.Prefix)
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defer stdOut.Close()
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defer stdErr.Close()
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err := execext.RunCommand(ctx, &execext.RunCommandOptions{
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Command: cmd.Cmd,
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Dir: t.Dir,
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Env: getEnviron(t),
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Stdin: e.Stdin,
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Stdout: stdOut,
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Stderr: stdErr,
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})
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if execext.IsExitError(err) && cmd.IgnoreError {
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e.Logger.VerboseErrf("task: command error ignored: %v", err)
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return nil
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}
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return err
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default:
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return nil
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}
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}
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func getEnviron(t *taskfile.Task) []string {
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if t.Env == nil {
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return nil
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}
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environ := os.Environ()
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for k, v := range t.Env.ToStringMap() {
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environ = append(environ, fmt.Sprintf("%s=%s", k, v))
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}
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return environ
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}
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