4b27c6719b
When sorting fs.DirEntries we sort by DirEntry type and when synchronizing files let the directories be before objects, so when the destintation fs doesn't support duplicate names, we will only lose duplicated object instead of whole directory. The enables synchronisation to work with a file and a directory of the same name which is reasonably common on bucket based remotes.
106 lines
2.1 KiB
Go
106 lines
2.1 KiB
Go
package fs
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import "fmt"
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// DirEntries is a slice of Object or *Dir
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type DirEntries []DirEntry
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// Len is part of sort.Interface.
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func (ds DirEntries) Len() int {
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return len(ds)
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}
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// Swap is part of sort.Interface.
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func (ds DirEntries) Swap(i, j int) {
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ds[i], ds[j] = ds[j], ds[i]
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}
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// Less is part of sort.Interface.
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func (ds DirEntries) Less(i, j int) bool {
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return CompareDirEntries(ds[i], ds[j]) < 0
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}
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// ForObject runs the function supplied on every object in the entries
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func (ds DirEntries) ForObject(fn func(o Object)) {
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for _, entry := range ds {
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o, ok := entry.(Object)
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if ok {
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fn(o)
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}
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}
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}
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// ForObjectError runs the function supplied on every object in the entries
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func (ds DirEntries) ForObjectError(fn func(o Object) error) error {
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for _, entry := range ds {
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o, ok := entry.(Object)
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if ok {
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err := fn(o)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// ForDir runs the function supplied on every Directory in the entries
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func (ds DirEntries) ForDir(fn func(dir Directory)) {
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for _, entry := range ds {
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dir, ok := entry.(Directory)
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if ok {
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fn(dir)
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}
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}
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}
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// ForDirError runs the function supplied on every Directory in the entries
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func (ds DirEntries) ForDirError(fn func(dir Directory) error) error {
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for _, entry := range ds {
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dir, ok := entry.(Directory)
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if ok {
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err := fn(dir)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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// DirEntryType returns a string description of the DirEntry, either
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// "object", "directory" or "unknown type XXX"
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func DirEntryType(d DirEntry) string {
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switch d.(type) {
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case Object:
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return "object"
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case Directory:
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return "directory"
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}
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return fmt.Sprintf("unknown type %T", d)
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}
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// CompareDirEntries returns 1 if a > b, 0 if a == b and -1 if a < b
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// If two dir entries have the same name, compare their types (directories are before objects)
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func CompareDirEntries(a, b DirEntry) int {
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aName := a.Remote()
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bName := b.Remote()
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if aName > bName {
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return 1
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} else if aName < bName {
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return -1
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}
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typeA := DirEntryType(a)
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typeB := DirEntryType(b)
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// same name, compare types
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if typeA > typeB {
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return 1
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} else if typeA < typeB {
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return -1
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}
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return 0
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}
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