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Merge pull request #1287 from prattmic/cachedir

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cache: OS-specific cache directories
This commit is contained in:
Alexander Neumann 2017-09-29 21:42:34 +02:00
commit bf58425351
2 changed files with 51 additions and 10 deletions
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2
internal/cache/cache.go vendored
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@ -84,7 +84,7 @@ func writeCachedirTag(dir string) error {
// performReadahead returns true. // performReadahead returns true.
func New(id string, basedir string) (c *Cache, err error) { func New(id string, basedir string) (c *Cache, err error) {
if basedir == "" { if basedir == "" {
basedir, err = getXDGCacheDir() basedir, err = defaultCacheDir()
if err != nil { if err != nil {
return nil, err return nil, err
} }

59
internal/cache/dir.go vendored
View File

@ -3,27 +3,68 @@ package cache
import ( import (
"os" "os"
"path/filepath" "path/filepath"
"runtime"
"github.com/pkg/errors" "github.com/pkg/errors"
"github.com/restic/restic/internal/debug" "github.com/restic/restic/internal/debug"
"github.com/restic/restic/internal/fs" "github.com/restic/restic/internal/fs"
) )
// getXDGCacheDir returns the cache directory according to XDG basedir spec, see // xdgCacheDir returns the cache directory according to XDG basedir spec, see
// http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html // http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
func getXDGCacheDir() (string, error) { func xdgCacheDir() (string, error) {
xdgcache := os.Getenv("XDG_CACHE_HOME") xdgcache := os.Getenv("XDG_CACHE_HOME")
home := os.Getenv("HOME") home := os.Getenv("HOME")
if xdgcache == "" && home == "" { if xdgcache != "" {
return "", errors.New("unable to locate cache directory (XDG_CACHE_HOME and HOME unset)") return filepath.Join(xdgcache, "restic"), nil
} else if home != "" {
return filepath.Join(home, ".cache", "restic"), nil
} }
cachedir := "" return "", errors.New("unable to locate cache directory (XDG_CACHE_HOME and HOME unset)")
if xdgcache != "" { }
cachedir = filepath.Join(xdgcache, "restic")
} else if home != "" { // windowsCacheDir returns the cache directory for Windows.
cachedir = filepath.Join(home, ".cache", "restic") //
// 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 (APPDATA 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
}
// defaultCacheDir determines and creates the default cache directory for this
// system.
func defaultCacheDir() (string, error) {
var cachedir string
var 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
} }
fi, err := fs.Stat(cachedir) fi, err := fs.Stat(cachedir)