fs: Manage empty directories - fixes #100
During the sync we collect a list of directories which should be empty and attempt to rmdir them at the end of the sync. If the directories are not empty then the rmdir will fail, logging a message but not erroring the sync.
This commit is contained in:
Nick Craig-Wood
parent
8a1a900733
commit
265fb8a5e2
1
fs/fs.go
1
fs/fs.go
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@ -49,6 +49,7 @@ var (
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ErrorIsFile = errors.New("is a file not a directory")
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ErrorNotAFile = errors.New("is a not a regular file")
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ErrorNotDeleting = errors.New("not deleting files as there were IO errors")
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ErrorNotDeletingDirs = errors.New("not deleting directories as there were IO errors")
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ErrorCantMoveOverlapping = errors.New("can't move files on overlapping remotes")
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ErrorDirectoryNotEmpty = errors.New("directory not empty")
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)
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66
fs/sync.go
66
fs/sync.go
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@ -4,6 +4,7 @@ package fs
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import (
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"fmt"
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"sort"
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"sync"
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"time"
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@ -30,6 +31,8 @@ type syncCopyMove struct {
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srcFilesChan chan Object // passes src objects
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srcFilesResult chan error // error result of src listing
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dstFilesResult chan error // error result of dst listing
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dstEmptyDirsMu sync.Mutex // protect dstEmptyDirs
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dstEmptyDirs []DirEntry // potentially empty directories
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abort chan struct{} // signal to abort the copiers
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checkerWg sync.WaitGroup // wait for checkers
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toBeChecked ObjectPairChan // checkers channel
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@ -508,6 +511,46 @@ func (s *syncCopyMove) deleteFiles(checkSrcMap bool) error {
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return deleteFilesWithBackupDir(toDelete, s.backupDir)
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}
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// This deletes the empty directories in the slice passed in. It
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// ignores any errors deleting directories
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func deleteEmptyDirectories(f Fs, entries DirEntries) error {
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if len(entries) == 0 {
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return nil
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}
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if Stats.Errored() {
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Errorf(f, "%v", ErrorNotDeletingDirs)
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return ErrorNotDeletingDirs
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}
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// Now delete the empty directories starting from the longest path
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sort.Sort(entries)
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var errorCount int
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var okCount int
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for i := len(entries) - 1; i >= 0; i-- {
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entry := entries[i]
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dir, ok := entry.(Directory)
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if ok {
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// TryRmdir only deletes empty directories
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err := TryRmdir(f, dir.Remote())
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if err != nil {
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Debugf(logDirName(f, dir.Remote()), "Failed to Rmdir: %v", err)
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errorCount++
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} else {
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okCount++
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}
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} else {
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Errorf(f, "Not a directory: %v", entry)
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}
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}
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if errorCount > 0 {
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Debugf(f, "failed to delete %d directories", errorCount)
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}
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if okCount > 0 {
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Debugf(f, "deleted %d directories", okCount)
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}
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return nil
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}
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// renameHash makes a string with the size and the hash for rename detection
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//
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// it may return an empty string in which case no hash could be made
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@ -680,7 +723,7 @@ func (s *syncCopyMove) run() error {
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if !ok {
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return
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}
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jobs := s._run(job)
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jobs := s.processJob(job)
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if len(jobs) > 0 {
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traversing.Add(len(jobs))
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go func() {
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@ -734,6 +777,15 @@ func (s *syncCopyMove) run() error {
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s.processError(s.deleteFiles(false))
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}
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}
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// Prune empty directories
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if s.deleteMode != DeleteModeOff {
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if s.currentError() != nil {
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Errorf(s.fdst, "%v", ErrorNotDeletingDirs)
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} else {
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s.processError(deleteEmptyDirectories(s.fdst, s.dstEmptyDirs))
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}
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}
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return s.currentError()
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}
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@ -764,6 +816,12 @@ func (s *syncCopyMove) dstOnly(dst DirEntry, job listDirJob, jobs *[]listDirJob)
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noSrc: true,
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})
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}
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// Record directory as it is potentially empty and needs deleting
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if s.fdst.Features().CanHaveEmptyDirectories {
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s.dstEmptyDirsMu.Lock()
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s.dstEmptyDirs = append(s.dstEmptyDirs, dst)
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s.dstEmptyDirsMu.Unlock()
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}
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default:
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panic("Bad object in DirEntries")
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@ -907,8 +965,12 @@ func matchListings(srcList, dstList DirEntries) (srcOnly DirEntries, dstOnly Dir
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return
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}
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// processJob processes a listDirJob listing the source and
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// destination directories, comparing them and returning a slice of
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// more jobs
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//
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// returns errors using processError
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func (s *syncCopyMove) _run(job listDirJob) (jobs []listDirJob) {
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func (s *syncCopyMove) processJob(job listDirJob) (jobs []listDirJob) {
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var (
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srcList, dstList DirEntries
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srcListErr, dstListErr error
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133
fs/sync_test.go
133
fs/sync_test.go
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@ -476,32 +476,141 @@ func TestSyncAfterRemovingAFileAndAddingAFileSubDir(t *testing.T) {
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file1 := r.WriteFile("a/potato2", "------------------------------------------------------------", t1)
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file2 := r.WriteObject("b/potato", "SMALLER BUT SAME DATE", t2)
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file3 := r.WriteBoth("c/non empty space", "AhHa!", t2)
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fstest.CheckItems(t, r.fremote, file2, file3)
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fstest.CheckItems(t, r.flocal, file1, file3)
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require.NoError(t, fs.Mkdir(r.fremote, "d"))
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require.NoError(t, fs.Mkdir(r.fremote, "d/e"))
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fstest.CheckListingWithPrecision(
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t,
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r.flocal,
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[]fstest.Item{
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file1,
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file3,
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},
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[]string{
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"a",
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"c",
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},
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fs.Config.ModifyWindow,
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)
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fstest.CheckListingWithPrecision(
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t,
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r.fremote,
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[]fstest.Item{
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file2,
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file3,
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},
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[]string{
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"b",
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"c",
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"d",
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"d/e",
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},
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fs.Config.ModifyWindow,
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)
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fs.Stats.ResetCounters()
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err := fs.Sync(r.fremote, r.flocal)
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require.NoError(t, err)
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fstest.CheckItems(t, r.flocal, file1, file3)
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fstest.CheckItems(t, r.fremote, file1, file3)
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fstest.CheckListingWithPrecision(
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t,
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r.flocal,
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[]fstest.Item{
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file1,
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file3,
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},
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[]string{
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"a",
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"c",
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},
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fs.Config.ModifyWindow,
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)
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fstest.CheckListingWithPrecision(
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t,
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r.fremote,
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[]fstest.Item{
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file1,
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file3,
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},
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[]string{
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"a",
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"c",
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},
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fs.Config.ModifyWindow,
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)
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}
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// Sync after removing a file and adding a file with IO Errors
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func TestSyncAfterRemovingAFileAndAddingAFileWithErrors(t *testing.T) {
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func TestSyncAfterRemovingAFileAndAddingAFileSubDirWithErrors(t *testing.T) {
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r := NewRun(t)
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defer r.Finalise()
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file1 := r.WriteFile("potato2", "------------------------------------------------------------", t1)
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file2 := r.WriteObject("potato", "SMALLER BUT SAME DATE", t2)
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file3 := r.WriteBoth("empty space", "", t2)
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fstest.CheckItems(t, r.fremote, file2, file3)
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fstest.CheckItems(t, r.flocal, file1, file3)
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file1 := r.WriteFile("a/potato2", "------------------------------------------------------------", t1)
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file2 := r.WriteObject("b/potato", "SMALLER BUT SAME DATE", t2)
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file3 := r.WriteBoth("c/non empty space", "AhHa!", t2)
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require.NoError(t, fs.Mkdir(r.fremote, "d"))
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fstest.CheckListingWithPrecision(
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t,
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r.flocal,
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[]fstest.Item{
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file1,
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file3,
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},
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[]string{
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"a",
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"c",
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},
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fs.Config.ModifyWindow,
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)
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fstest.CheckListingWithPrecision(
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t,
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r.fremote,
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[]fstest.Item{
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file2,
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file3,
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},
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[]string{
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"b",
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"c",
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"d",
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},
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fs.Config.ModifyWindow,
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)
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fs.Stats.ResetCounters()
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fs.Stats.Error()
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err := fs.Sync(r.fremote, r.flocal)
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assert.Equal(t, fs.ErrorNotDeleting, err)
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fstest.CheckItems(t, r.flocal, file1, file3)
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fstest.CheckItems(t, r.fremote, file1, file2, file3)
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fstest.CheckListingWithPrecision(
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t,
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r.flocal,
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[]fstest.Item{
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file1,
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file3,
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},
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[]string{
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"a",
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"c",
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},
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fs.Config.ModifyWindow,
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)
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fstest.CheckListingWithPrecision(
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t,
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r.fremote,
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[]fstest.Item{
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file1,
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file2,
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file3,
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},
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[]string{
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"a",
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"b",
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"c",
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"d",
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},
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fs.Config.ModifyWindow,
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)
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}
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// Sync test delete after
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