utils.go

package compressor

import (
	"fmt"
	"io"
	"os"
	"path/filepath"
	"runtime"
)

func mkdir(dirPath string) error {
	err := os.MkdirAll(dirPath, 0755)
	if err != nil {
		return fmt.Errorf("%s: making directory: %v", dirPath, err)
	}
	return nil
}

func writeNewFile(fpath string, in io.Reader, fm os.FileMode) error {
	err := os.MkdirAll(filepath.Dir(fpath), 0755)
	if err != nil {
		return fmt.Errorf("%s: making directory for file: %v", fpath, err)
	}

	out, err := os.Create(fpath)
	if err != nil {
		return fmt.Errorf("%s: creating new file: %v", fpath, err)
	}
	defer out.Close()

	err = out.Chmod(fm)
	if err != nil && runtime.GOOS != "windows" {
		return fmt.Errorf("%s: changing file mode: %v", fpath, err)
	}

	_, err = io.Copy(out, in)
	if err != nil {
		return fmt.Errorf("%s: writing file: %v", fpath, err)
	}
	return nil
}

func writeNewSymbolicLink(fpath string, target string) error {
	err := os.MkdirAll(filepath.Dir(fpath), 0755)
	if err != nil {
		return fmt.Errorf("%s: making directory for file: %v", fpath, err)
	}

	err = os.Symlink(target, fpath)
	if err != nil {
		return fmt.Errorf("%s: making symbolic link for: %v", fpath, err)
	}

	return nil
}

func writeNewHardLink(fpath string, target string) error {
	err := os.MkdirAll(filepath.Dir(fpath), 0755)
	if err != nil {
		return fmt.Errorf("%s: making directory for file: %v", fpath, err)
	}

	err = os.Link(target, fpath)
	if err != nil {
		return fmt.Errorf("%s: making hard link for: %v", fpath, err)
	}

	return nil
}