diff options
Diffstat (limited to 'plumbing/format/index/index.go')
| -rw-r--r-- | plumbing/format/index/index.go | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/plumbing/format/index/index.go b/plumbing/format/index/index.go index fc7b8cd..6c4b7ca 100644 --- a/plumbing/format/index/index.go +++ b/plumbing/format/index/index.go @@ -18,9 +18,10 @@ var ( // ErrEntryNotFound is returned by Index.Entry, if an entry is not found. ErrEntryNotFound = errors.New("entry not found") - indexSignature = []byte{'D', 'I', 'R', 'C'} - treeExtSignature = []byte{'T', 'R', 'E', 'E'} - resolveUndoExtSignature = []byte{'R', 'E', 'U', 'C'} + indexSignature = []byte{'D', 'I', 'R', 'C'} + treeExtSignature = []byte{'T', 'R', 'E', 'E'} + resolveUndoExtSignature = []byte{'R', 'E', 'U', 'C'} + endOfIndexEntryExtSignature = []byte{'E', 'O', 'I', 'E'} ) // Stage during merge @@ -50,6 +51,8 @@ type Index struct { Cache *Tree // ResolveUndo represents the 'Resolve undo' extension ResolveUndo *ResolveUndo + // EndOfIndexEntry represents the 'End of Index Entry' extension + EndOfIndexEntry *EndOfIndexEntry } // Add creates a new Entry and returns it. The caller should first check that @@ -193,3 +196,18 @@ type ResolveUndoEntry struct { Path string Stages map[Stage]plumbing.Hash } + +// EndOfIndexEntry is the End of Index Entry (EOIE) is used to locate the end of +// the variable length index entries and the begining of the extensions. Code +// can take advantage of this to quickly locate the index extensions without +// having to parse through all of the index entries. +// +// Because it must be able to be loaded before the variable length cache +// entries and other index extensions, this extension must be written last. +type EndOfIndexEntry struct { + // Offset to the end of the index entries + Offset uint32 + // Hash is a SHA-1 over the extension types and their sizes (but not + // their contents). + Hash plumbing.Hash +} |