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Code Issues Releases Wiki Activity

cleanup

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This commit is contained in:
Florian Weingarten 2015-04-29 21:30:53 -04:00
parent c9f1f08019
commit 7af7c64403
1 changed files with 18 additions and 23 deletions
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41
cache.go
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@ -17,33 +17,26 @@ type Cache struct {
base string base string
} }
func NewCache(be backend.Identifier) (c *Cache, err error) { func NewCache(be backend.Identifier) (*Cache, error) {
// try to get explicit cache dir from environment cacheDir, err := getCacheDir()
dir := os.Getenv("RESTIC_CACHE") if err != nil {
return nil, err
// otherwise try OS specific default
if dir == "" {
dir, err = GetCacheDir()
if err != nil {
return nil, err
}
} }
basedir := filepath.Join(dir, be.ID()) basedir := filepath.Join(cacheDir, be.ID())
debug.Log("Cache.New", "opened cache at %v", basedir) debug.Log("Cache.New", "opened cache at %v", basedir)
return &Cache{base: basedir}, nil return &Cache{base: basedir}, nil
} }
func (c *Cache) Has(t backend.Type, subtype string, id backend.ID) (bool, error) { func (c *Cache) Has(t backend.Type, subtype string, id backend.ID) (bool, error) {
// try to open file
filename, err := c.filename(t, subtype, id) filename, err := c.filename(t, subtype, id)
if err != nil { if err != nil {
return false, err return false, err
} }
fd, err := os.Open(filename) fd, err := os.Open(filename)
defer fd.Close() defer fd.Close()
if err != nil { if err != nil {
if os.IsNotExist(err) { if os.IsNotExist(err) {
debug.Log("Cache.Has", "test for file %v: not cached", filename) debug.Log("Cache.Has", "test for file %v: not cached", filename)
@ -81,7 +74,6 @@ func (c *Cache) Store(t backend.Type, subtype string, id backend.ID) (io.WriteCl
} }
func (c *Cache) Load(t backend.Type, subtype string, id backend.ID) (io.ReadCloser, error) { func (c *Cache) Load(t backend.Type, subtype string, id backend.ID) (io.ReadCloser, error) {
// try to open file
filename, err := c.filename(t, subtype, id) filename, err := c.filename(t, subtype, id)
if err != nil { if err != nil {
return nil, err return nil, err
@ -90,14 +82,14 @@ func (c *Cache) Load(t backend.Type, subtype string, id backend.ID) (io.ReadClos
return os.Open(filename) return os.Open(filename)
} }
func (c *Cache) Purge(t backend.Type, subtype string, id backend.ID) error { func (c *Cache) purge(t backend.Type, subtype string, id backend.ID) error {
filename, err := c.filename(t, subtype, id) filename, err := c.filename(t, subtype, id)
if err != nil { if err != nil {
return err return err
} }
err = os.Remove(filename) err = os.Remove(filename)
debug.Log("Cache.Purge", "Remove file %v: %v", filename, err) debug.Log("Cache.purge", "Remove file %v: %v", filename, err)
if err != nil && os.IsNotExist(err) { if err != nil && os.IsNotExist(err) {
return nil return nil
@ -118,7 +110,7 @@ func (c *Cache) Clear(s *server.Server) error {
if ok, err := s.Test(backend.Snapshot, entry.ID.String()); !ok || err != nil { if ok, err := s.Test(backend.Snapshot, entry.ID.String()); !ok || err != nil {
debug.Log("Cache.Clear", "snapshot %v doesn't exist any more, removing %v", entry.ID, entry) debug.Log("Cache.Clear", "snapshot %v doesn't exist any more, removing %v", entry.ID, entry)
err = c.Purge(backend.Snapshot, entry.Subtype, entry.ID) err = c.purge(backend.Snapshot, entry.Subtype, entry.ID)
if err != nil { if err != nil {
return err return err
} }
@ -188,7 +180,6 @@ func (c *Cache) List(t backend.Type) ([]CacheEntry, error) {
return entries, nil return entries, nil
} }
// Construct file name for given Type.
func (c *Cache) filename(t backend.Type, subtype string, id backend.ID) (string, error) { func (c *Cache) filename(t backend.Type, subtype string, id backend.ID) (string, error) {
filename := id.String() filename := id.String()
if subtype != "" { if subtype != "" {
@ -203,11 +194,17 @@ func (c *Cache) filename(t backend.Type, subtype string, id backend.ID) (string,
return "", fmt.Errorf("cache not supported for type %v", t) return "", fmt.Errorf("cache not supported for type %v", t)
} }
// high-level functions func getCacheDir() (string, error) {
if dir := os.Getenv("RESTIC_CACHE"); dir != "" {
return dir, nil
}
// GetCacheDir returns the cache directory according to XDG basedir spec, see return getXDGCacheDir()
}
// getXDGCacheDir 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 GetCacheDir() (string, error) { func getXDGCacheDir() (string, error) {
xdgcache := os.Getenv("XDG_CACHE_HOME") xdgcache := os.Getenv("XDG_CACHE_HOME")
home := os.Getenv("HOME") home := os.Getenv("HOME")
@ -243,5 +240,3 @@ func GetCacheDir() (string, error) {
return cachedir, nil return cachedir, nil
} }
// TODO: implement RefreshIndex()