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task/taskfile/merge.go
2024-01-11 14:00:30 +00:00

94 lines
3.0 KiB
Go

package taskfile
import (
"fmt"
"strings"
"github.com/go-task/task/v3/taskfile/ast"
)
// NamespaceSeparator contains the character that separates namespaces
const NamespaceSeparator = ":"
// Merge merges the second Taskfile into the first
func Merge(t1, t2 *ast.Taskfile, include *ast.Include) error {
if !t1.Version.Equal(t2.Version) {
return fmt.Errorf(`task: Taskfiles versions should match. First is "%s" but second is "%s"`, t1.Version, t2.Version)
}
if t2.Output.IsSet() {
t1.Output = t2.Output
}
if t1.Vars == nil {
t1.Vars = &ast.Vars{}
}
if t1.Env == nil {
t1.Env = &ast.Vars{}
}
t1.Vars.Merge(t2.Vars)
t1.Env.Merge(t2.Env)
if err := t2.Tasks.Range(func(k string, v *ast.Task) error {
// We do a deep copy of the task struct here to ensure that no data can
// be changed elsewhere once the taskfile is merged.
task := v.DeepCopy()
// Set the task to internal if EITHER the included task or the included
// taskfile are marked as internal
task.Internal = task.Internal || (include != nil && include.Internal)
// Add namespaces to dependencies, commands and aliases
for _, dep := range task.Deps {
if dep != nil && dep.Task != "" {
dep.Task = taskNameWithNamespace(dep.Task, include.Namespace)
}
}
for _, cmd := range task.Cmds {
if cmd != nil && cmd.Task != "" {
cmd.Task = taskNameWithNamespace(cmd.Task, include.Namespace)
}
}
for i, alias := range task.Aliases {
task.Aliases[i] = taskNameWithNamespace(alias, include.Namespace)
}
// Add namespace aliases
if include != nil {
for _, namespaceAlias := range include.Aliases {
task.Aliases = append(task.Aliases, taskNameWithNamespace(task.Task, namespaceAlias))
for _, alias := range v.Aliases {
task.Aliases = append(task.Aliases, taskNameWithNamespace(alias, namespaceAlias))
}
}
}
// Add the task to the merged taskfile
taskNameWithNamespace := taskNameWithNamespace(k, include.Namespace)
task.Task = taskNameWithNamespace
t1.Tasks.Set(taskNameWithNamespace, task)
return nil
}); err != nil {
return err
}
// If the included Taskfile has a default task and the parent namespace has
// no task with a matching name, we can add an alias so that the user can
// run the included Taskfile's default task without specifying its full
// name. If the parent namespace has aliases, we add another alias for each
// of them.
if t2.Tasks.Get("default") != nil && t1.Tasks.Get(include.Namespace) == nil {
defaultTaskName := fmt.Sprintf("%s:default", include.Namespace)
t1.Tasks.Get(defaultTaskName).Aliases = append(t1.Tasks.Get(defaultTaskName).Aliases, include.Namespace)
t1.Tasks.Get(defaultTaskName).Aliases = append(t1.Tasks.Get(defaultTaskName).Aliases, include.Aliases...)
}
return nil
}
func taskNameWithNamespace(taskName string, namespace string) string {
if strings.HasPrefix(taskName, NamespaceSeparator) {
return strings.TrimPrefix(taskName, NamespaceSeparator)
}
return fmt.Sprintf("%s%s%s", namespace, NamespaceSeparator, taskName)
}