Refactor task.Setup(): Move to its own file and split in separated fu…

…nctions

setup.go

@@ -0,0 +1,277 @@
+package task
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	compilerv2 "github.com/go-task/task/v3/internal/compiler/v2"
+	compilerv3 "github.com/go-task/task/v3/internal/compiler/v3"
+	"github.com/go-task/task/v3/internal/execext"
+	"github.com/go-task/task/v3/internal/logger"
+	"github.com/go-task/task/v3/internal/output"
+	"github.com/go-task/task/v3/taskfile"
+	"github.com/go-task/task/v3/taskfile/read"
+)
+
+func (e *Executor) Setup() error {
+	if err := e.readTaskfile(); err != nil {
+		return err
+	}
+
+	v, err := e.Taskfile.ParsedVersion()
+	if err != nil {
+		return err
+	}
+
+	if err := e.setupTempDir(); err != nil {
+		return err
+	}
+	e.setupStdFiles()
+	e.setupLogger()
+	if err := e.setupOutput(); err != nil {
+		return err
+	}
+	if err := e.setupCompiler(v); err != nil {
+		return err
+	}
+	if err := e.readDotEnvFiles(v); err != nil {
+		return err
+	}
+
+	if err := e.doVersionChecks(v); err != nil {
+		return err
+	}
+	e.setupDefaults(v)
+	e.setupConcurrencyState()
+
+	return nil
+}
+
+func (e *Executor) readTaskfile() error {
+	var err error
+	e.Taskfile, err = read.Taskfile(&read.ReaderNode{
+		Dir:        e.Dir,
+		Entrypoint: e.Entrypoint,
+		Parent:     nil,
+		Optional:   false,
+	})
+	return err
+}
+
+func (e *Executor) setupTempDir() error {
+	if e.TempDir != "" {
+		return nil
+	}
+
+	if os.Getenv("TASK_TEMP_DIR") == "" {
+		e.TempDir = filepath.Join(e.Dir, ".task")
+	} else if filepath.IsAbs(os.Getenv("TASK_TEMP_DIR")) || strings.HasPrefix(os.Getenv("TASK_TEMP_DIR"), "~") {
+		tempDir, err := execext.Expand(os.Getenv("TASK_TEMP_DIR"))
+		if err != nil {
+			return err
+		}
+		projectDir, _ := filepath.Abs(e.Dir)
+		projectName := filepath.Base(projectDir)
+		e.TempDir = filepath.Join(tempDir, projectName)
+	} else {
+		e.TempDir = filepath.Join(e.Dir, os.Getenv("TASK_TEMP_DIR"))
+	}
+
+	return nil
+}
+
+func (e *Executor) setupStdFiles() {
+	if e.Stdin == nil {
+		e.Stdin = os.Stdin
+	}
+	if e.Stdout == nil {
+		e.Stdout = os.Stdout
+	}
+	if e.Stderr == nil {
+		e.Stderr = os.Stderr
+	}
+}
+
+func (e *Executor) setupLogger() {
+	e.Logger = &logger.Logger{
+		Stdout:  e.Stdout,
+		Stderr:  e.Stderr,
+		Verbose: e.Verbose,
+		Color:   e.Color,
+	}
+}
+
+func (e *Executor) setupOutput() error {
+	if !e.OutputStyle.IsSet() {
+		e.OutputStyle = e.Taskfile.Output
+	}
+
+	var err error
+	e.Output, err = output.BuildFor(&e.OutputStyle)
+	return err
+}
+
+func (e *Executor) setupCompiler(v float64) error {
+	if v < 3 {
+		var err error
+		e.taskvars, err = read.Taskvars(e.Dir)
+		if err != nil {
+			return err
+		}
+
+		e.Compiler = &compilerv2.CompilerV2{
+			Dir:          e.Dir,
+			Taskvars:     e.taskvars,
+			TaskfileVars: e.Taskfile.Vars,
+			Expansions:   e.Taskfile.Expansions,
+			Logger:       e.Logger,
+		}
+	} else {
+		e.Compiler = &compilerv3.CompilerV3{
+			Dir:          e.Dir,
+			TaskfileEnv:  e.Taskfile.Env,
+			TaskfileVars: e.Taskfile.Vars,
+			Logger:       e.Logger,
+		}
+	}
+
+	return nil
+}
+
+func (e *Executor) readDotEnvFiles(v float64) error {
+	if v < 3.0 {
+		return nil
+	}
+
+	env, err := read.Dotenv(e.Compiler, e.Taskfile, e.Dir)
+	if err != nil {
+		return err
+	}
+
+	err = env.Range(func(key string, value taskfile.Var) error {
+		if _, ok := e.Taskfile.Env.Mapping[key]; !ok {
+			e.Taskfile.Env.Set(key, value)
+		}
+		return nil
+	})
+	return err
+}
+
+func (e *Executor) setupDefaults(v float64) {
+	// Color available only on v3
+	if v < 3 {
+		e.Logger.Color = false
+	}
+
+	if e.Taskfile.Method == "" {
+		if v >= 3 {
+			e.Taskfile.Method = "checksum"
+		} else {
+			e.Taskfile.Method = "timestamp"
+		}
+	}
+
+	if e.Taskfile.Run == "" {
+		e.Taskfile.Run = "always"
+	}
+}
+
+func (e *Executor) setupConcurrencyState() {
+	e.executionHashes = make(map[string]context.Context)
+
+	e.taskCallCount = make(map[string]*int32, len(e.Taskfile.Tasks))
+	e.mkdirMutexMap = make(map[string]*sync.Mutex, len(e.Taskfile.Tasks))
+	for k := range e.Taskfile.Tasks {
+		e.taskCallCount[k] = new(int32)
+		e.mkdirMutexMap[k] = &sync.Mutex{}
+	}
+
+	if e.Concurrency > 0 {
+		e.concurrencySemaphore = make(chan struct{}, e.Concurrency)
+	}
+}
+
+func (e *Executor) doVersionChecks(v float64) error {
+	if v < 2 {
+		return fmt.Errorf(`task: Taskfile versions prior to v2 are not supported anymore`)
+	}
+
+	// consider as equal to the greater version if round
+	if v == 2.0 {
+		v = 2.6
+	}
+	if v == 3.0 {
+		v = 3.8
+	}
+
+	if v > 3.8 {
+		return fmt.Errorf(`task: Taskfile versions greater than v3.8 not implemented in the version of Task`)
+	}
+
+	if v < 2.1 && !e.Taskfile.Output.IsSet() {
+		return fmt.Errorf(`task: Taskfile option "output" is only available starting on Taskfile version v2.1`)
+	}
+	if v < 2.2 && e.Taskfile.Includes.Len() > 0 {
+		return fmt.Errorf(`task: Including Taskfiles is only available starting on Taskfile version v2.2`)
+	}
+	if v >= 3.0 && e.Taskfile.Expansions > 2 {
+		return fmt.Errorf(`task: The "expansions" setting is not available anymore on v3.0`)
+	}
+	if v < 3.8 && e.Taskfile.Output.Group.IsSet() {
+		return fmt.Errorf(`task: Taskfile option "output.group" is only available starting on Taskfile version v3.8`)
+	}
+
+	if v <= 2.1 {
+		err := errors.New(`task: Taskfile option "ignore_error" is only available starting on Taskfile version v2.1`)
+
+		for _, task := range e.Taskfile.Tasks {
+			if task.IgnoreError {
+				return err
+			}
+			for _, cmd := range task.Cmds {
+				if cmd.IgnoreError {
+					return err
+				}
+			}
+		}
+	}
+
+	if v < 2.6 {
+		for _, task := range e.Taskfile.Tasks {
+			if len(task.Preconditions) > 0 {
+				return errors.New(`task: Task option "preconditions" is only available starting on Taskfile version v2.6`)
+			}
+		}
+	}
+
+	if v < 3 {
+		err := e.Taskfile.Includes.Range(func(_ string, taskfile taskfile.IncludedTaskfile) error {
+			if taskfile.AdvancedImport {
+				return errors.New(`task: Import with additional parameters is only available starting on Taskfile version v3`)
+			}
+			return nil
+		})
+		if err != nil {
+			return err
+		}
+	}
+
+	if v < 3.7 {
+		if e.Taskfile.Run != "" {
+			return errors.New(`task: Setting the "run" type is only available starting on Taskfile version v3.7`)
+		}
+
+		for _, task := range e.Taskfile.Tasks {
+			if task.Run != "" {
+				return errors.New(`task: Setting the "run" type is only available starting on Taskfile version v3.7`)
+			}
+		}
+	}
+
+	return nil
+}