mirror of https://github.com/restic/restic.git
103 lines
2.7 KiB
Go
103 lines
2.7 KiB
Go
package cache
|
|
|
|
import (
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
|
|
"github.com/pkg/errors"
|
|
"github.com/restic/restic/internal/debug"
|
|
"github.com/restic/restic/internal/fs"
|
|
)
|
|
|
|
// xdgCacheDir returns the cache directory according to XDG basedir spec, see
|
|
// http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
|
|
// unless RESTIC_CACHE_DIR is defined
|
|
func xdgCacheDir() (string, error) {
|
|
cachedir := os.Getenv("RESTIC_CACHE_DIR")
|
|
xdgcache := os.Getenv("XDG_CACHE_HOME")
|
|
home := os.Getenv("HOME")
|
|
|
|
if cachedir != "" {
|
|
return cachedir, nil
|
|
} else if xdgcache != "" {
|
|
return filepath.Join(xdgcache, "restic"), nil
|
|
} else if home != "" {
|
|
return filepath.Join(home, ".cache", "restic"), nil
|
|
}
|
|
|
|
return "", errors.New("unable to locate cache directory (RESTIC_CACHE_DIR, XDG_CACHE_HOME and HOME unset)")
|
|
}
|
|
|
|
// windowsCacheDir returns the cache directory for Windows.
|
|
//
|
|
// Uses LOCALAPPDATA, where application data not synchronized between machines
|
|
// is stored. (Browser caches stored here).
|
|
func windowsCacheDir() (string, error) {
|
|
appdata := os.Getenv("LOCALAPPDATA")
|
|
if appdata == "" {
|
|
return "", errors.New("unable to locate cache directory (LOCALAPPDATA unset)")
|
|
}
|
|
return filepath.Join(appdata, "restic"), nil
|
|
}
|
|
|
|
// darwinCacheDir returns the cache directory for darwin.
|
|
//
|
|
// Uses ~/Library/Caches/, which is recommended by Apple, see
|
|
// https://developer.apple.com/library/content/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/MacOSXDirectories/MacOSXDirectories.html
|
|
func darwinCacheDir() (string, error) {
|
|
home := os.Getenv("HOME")
|
|
if home == "" {
|
|
return "", errors.New("unable to locate cache directory (HOME unset)")
|
|
}
|
|
return filepath.Join(home, "Library", "Caches", "restic"), nil
|
|
}
|
|
|
|
// DefaultDir returns the default cache directory for the current OS.
|
|
func DefaultDir() (cachedir string, err error) {
|
|
switch runtime.GOOS {
|
|
case "darwin":
|
|
cachedir, err = darwinCacheDir()
|
|
case "windows":
|
|
cachedir, err = windowsCacheDir()
|
|
default:
|
|
// Default to XDG for Linux and any other OSes.
|
|
cachedir, err = xdgCacheDir()
|
|
}
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return cachedir, nil
|
|
}
|
|
|
|
// mkdirCacheDir ensures that the cache directory exists. It it didn't, created
|
|
// is set to true.
|
|
func mkdirCacheDir(cachedir string) (created bool, err error) {
|
|
var newCacheDir bool
|
|
|
|
fi, err := fs.Stat(cachedir)
|
|
if os.IsNotExist(errors.Cause(err)) {
|
|
err = fs.MkdirAll(cachedir, 0700)
|
|
if err != nil {
|
|
return true, errors.Wrap(err, "MkdirAll")
|
|
}
|
|
|
|
fi, err = fs.Stat(cachedir)
|
|
debug.Log("create cache dir %v", cachedir)
|
|
|
|
newCacheDir = true
|
|
}
|
|
|
|
if err != nil {
|
|
return newCacheDir, errors.Wrap(err, "Stat")
|
|
}
|
|
|
|
if !fi.IsDir() {
|
|
return newCacheDir, errors.Errorf("cache dir %v is not a directory", cachedir)
|
|
}
|
|
|
|
return newCacheDir, nil
|
|
}
|