/
dirs.go
126 lines (102 loc) · 2.49 KB
/
dirs.go
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package dirs
import (
"fmt"
"io/ioutil"
"os"
"os/user"
"path/filepath"
)
func CurrentHomeDir() (string, error) {
home := os.Getenv("HOME")
if home != "" {
return home, nil
}
current, err := user.Current()
if err != nil {
return "", err
}
return current.HomeDir, nil
}
// WindmillDir returns the root Windmill directory; by default ~/.windmill
func GetWindmillDir() (string, error) {
dir := os.Getenv("WMDAEMON_HOME")
if dir == "" {
dir = os.Getenv("WINDMILL_DIR")
}
if dir == "" {
homedir, err := CurrentHomeDir()
if err != nil {
return "", err
}
if homedir == "" {
return "", fmt.Errorf("Cannot find home directory; $HOME unset")
}
dir = filepath.Join(homedir, ".windmill")
}
dir, err := filepath.Abs(dir)
if err != nil {
return "", err
}
if _, err := os.Stat(dir); err != nil {
if os.IsNotExist(err) {
os.Mkdir(dir, os.FileMode(0755))
} else {
return "", err
}
}
return dir, nil
}
func UseWindmillDir() (*WindmillDir, error) {
dir, err := GetWindmillDir()
if err != nil {
return nil, err
}
return &WindmillDir{dir: dir}, nil
}
// Create a windmill dir at an arbitrary directory. Useful for testing.
func NewWindmillDirAt(dir string) *WindmillDir {
return &WindmillDir{dir: dir}
}
type WindmillDir struct {
dir string
}
func (d *WindmillDir) Root() string {
return d.dir
}
func (d *WindmillDir) OpenFile(p string, flag int, perm os.FileMode) (*os.File, error) {
err := d.MkdirAll(filepath.Dir(p))
if err != nil {
return nil, err
}
return os.OpenFile(filepath.Join(d.dir, p), flag, perm)
}
func (d *WindmillDir) WriteFile(p, text string) error {
err := d.MkdirAll(filepath.Dir(p))
if err != nil {
return err
}
return ioutil.WriteFile(filepath.Join(d.dir, p), []byte(text), os.FileMode(0700))
}
func (d *WindmillDir) ReadFile(p string) (string, error) {
if filepath.IsAbs(p) {
return "", fmt.Errorf("WindmillDir.ReadFile: p must be relative to .windmill root: %v", p)
}
abs := filepath.Join(d.dir, p)
bs, err := ioutil.ReadFile(abs)
if err != nil {
return "", err
}
return string(bs), nil
}
func (d *WindmillDir) MkdirAll(p string) error {
if filepath.IsAbs(p) {
return fmt.Errorf("WindmillDir.MkdirAll: p must be relative to .windmill root: %v", p)
}
return os.MkdirAll(filepath.Join(d.dir, p), os.FileMode(0700))
}
func (d *WindmillDir) Abs(p string) (string, error) {
if filepath.IsAbs(p) {
return "", fmt.Errorf("WindmillDir.Abs: p must be relative to .windmill root: %v", p)
}
return filepath.Join(d.dir, p), nil
}