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Simplify layout detection

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This commit is contained in:
Alexander Neumann 2017-05-15 23:36:23 +02:00
parent 069752cb42
commit 959aa0f595
1 changed files with 3 additions and 45 deletions
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48
src/restic/backend/layout.go
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@ -85,36 +85,6 @@ func hasBackendFile(fs Filesystem, dir string) (bool, error) {
return false, nil return false, nil
} }
var dataSubdirName = regexp.MustCompile("^[a-fA-F0-9]{2}$")
func hasSubdirBackendFile(fs Filesystem, dir string) (bool, error) {
entries, err := fs.ReadDir(dir)
if err != nil && fs.IsNotExist(errors.Cause(err)) {
return false, nil
}
if err != nil {
return false, errors.Wrap(err, "ReadDir")
}
for _, subdir := range entries {
if !dataSubdirName.MatchString(subdir.Name()) {
continue
}
present, err := hasBackendFile(fs, fs.Join(dir, subdir.Name()))
if err != nil {
return false, err
}
if present {
return true, nil
}
}
return false, nil
}
// ErrLayoutDetectionFailed is returned by DetectLayout() when the layout // ErrLayoutDetectionFailed is returned by DetectLayout() when the layout
// cannot be detected automatically. // cannot be detected automatically.
var ErrLayoutDetectionFailed = errors.New("auto-detecting the filesystem layout failed") var ErrLayoutDetectionFailed = errors.New("auto-detecting the filesystem layout failed")
@ -140,19 +110,7 @@ func DetectLayout(repo Filesystem, dir string) (Layout, error) {
return nil, err return nil, err
} }
// data file in "data" directory (S3LegacyLayout) if foundKeysFile && !foundKeyFile {
foundDataFile, err := hasBackendFile(repo, repo.Join(dir, s3LayoutPaths[restic.DataFile]))
if err != nil {
return nil, err
}
// data file in subdir of "data" directory (DefaultLayout)
foundDataSubdirFile, err := hasSubdirBackendFile(repo, repo.Join(dir, s3LayoutPaths[restic.DataFile]))
if err != nil {
return nil, err
}
if foundKeysFile && foundDataSubdirFile && !foundKeyFile && !foundDataFile {
debug.Log("found default layout at %v", dir) debug.Log("found default layout at %v", dir)
return &DefaultLayout{ return &DefaultLayout{
Path: dir, Path: dir,
@ -160,7 +118,7 @@ func DetectLayout(repo Filesystem, dir string) (Layout, error) {
}, nil }, nil
} }
if foundKeyFile && foundDataFile && !foundKeysFile && !foundDataSubdirFile { if foundKeyFile && !foundKeysFile {
debug.Log("found s3 layout at %v", dir) debug.Log("found s3 layout at %v", dir)
return &S3LegacyLayout{ return &S3LegacyLayout{
Path: dir, Path: dir,
@ -192,7 +150,7 @@ func ParseLayout(repo Filesystem, layout, defaultLayout, path string) (l Layout,
// use the default layout if auto detection failed // use the default layout if auto detection failed
if errors.Cause(err) == ErrLayoutDetectionFailed && defaultLayout != "" { if errors.Cause(err) == ErrLayoutDetectionFailed && defaultLayout != "" {
debug.Log("error: %v, use default layout %v", defaultLayout) debug.Log("error: %v, use default layout %v", err, defaultLayout)
return ParseLayout(repo, defaultLayout, "", path) return ParseLayout(repo, defaultLayout, "", path)
} }