plumbing: commitgraph, fix types and handle commit-graph-chains

Unfortunately the original variant makes some incorrect typing
assumptions about commit-graphs which make handling graph chains
difficult to do correctly. This creates a new subpackage and deprecates
the old one. It then adds support commit graph chains.

Signed-off-by: Andrew Thornton <art27@cantab.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/plumbing/format/commitgraph/file.go b/plumbing/format/commitgraph/file.go
index 17c1c5d..ef8fb34 100644
--- a/plumbing/format/commitgraph/file.go
+++ b/plumbing/format/commitgraph/file.go
@@ -13,6 +13,9 @@ import (
 	"github.com/go-git/go-git/v5/utils/binary"

 )

 

+// Deprecated: This package uses the wrong types for Generation and Index in CommitData.

+// Use the v2 package instead.

+

 var (

 	// ErrUnsupportedVersion is returned by OpenFileIndex when the commit graph

 	// file version is not supported.

@@ -51,6 +54,9 @@ type fileIndex struct {
 

 // OpenFileIndex opens a serialized commit graph file in the format described at

 // https://github.com/git/git/blob/master/Documentation/technical/commit-graph-format.txt

+//

+// Deprecated: This package uses the wrong types for Generation and Index in CommitData.

+// Use the v2 package instead.

 func OpenFileIndex(reader io.ReaderAt) (Index, error) {

 	fi := &fileIndex{reader: reader}