rename 2 files

- read_taskfile.go -> taskfile.go
- variable_handling.go -> variables.go

taskfile.go

@@ -0,0 +1,56 @@
+package task
+
+import (
+	"fmt"
+	"io/ioutil"
+	"path/filepath"
+	"runtime"
+
+	"github.com/imdario/mergo"
+	"gopkg.in/yaml.v2"
+)
+
+// ReadTaskfile parses Taskfile from the disk
+func (e *Executor) ReadTaskfile() error {
+	path := filepath.Join(e.Dir, TaskFilePath)
+
+	var err error
+	e.Tasks, err = e.readTaskfileData(path)
+	if err != nil {
+		return err
+	}
+
+	osTasks, err := e.readTaskfileData(fmt.Sprintf("%s_%s", path, runtime.GOOS))
+	if err != nil {
+		switch err.(type) {
+		case taskFileNotFound:
+		default:
+			return err
+		}
+	}
+	if err := mergo.MapWithOverwrite(&e.Tasks, osTasks); err != nil {
+		return err
+	}
+	if err := e.readTaskvarsFile(); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (e *Executor) readTaskfileData(path string) (tasks map[string]*Task, err error) {
+	if b, err := ioutil.ReadFile(path + ".yml"); err == nil {
+		return tasks, yaml.Unmarshal(b, &tasks)
+	}
+	return nil, taskFileNotFound{path}
+}
+
+func (e *Executor) readTaskvarsFile() error {
+	file := filepath.Join(e.Dir, TaskvarsFilePath)
+
+	if b, err := ioutil.ReadFile(file + ".yml"); err == nil {
+		if err := yaml.Unmarshal(b, &e.taskvars); err != nil {
+			return err
+		}
+	}
+	return nil
+}