path: root/Documentation/git-index-pack.txt
diff options
authorShawn Pearce <>2006-10-29 09:41:59 (GMT)
committerJunio C Hamano <>2006-10-29 21:45:03 (GMT)
commitb8077709243138c3d8cc1c096c06a95b250a9001 (patch)
tree5ceb0feedf42c88fafc1210f826678c3c87e488a /Documentation/git-index-pack.txt
parent01cff2d2ca77dc050973e1fc4702119a715cc919 (diff)
Teach git-index-pack how to keep a pack file.
To prevent a race condition between `index-pack --stdin` and `repack -a -d` where the repack deletes the newly created pack file before any refs are updated to reference objects contained within it we mark the pack file as one that should be kept. This removes it from the list of packs that `repack -a -d` will consider for removal. Callers such as `receive-pack` which want to invoke `index-pack` should use this new --keep option to prevent the newly created pack and index file pair from being deleted before they have finished any related ref updates. Only after all ref updates have been finished should the associated .keep file be removed. Signed-off-by: Shawn O. Pearce <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'Documentation/git-index-pack.txt')
1 files changed, 21 insertions, 3 deletions
diff --git a/Documentation/git-index-pack.txt b/Documentation/git-index-pack.txt
index 9fa4847..1235416 100644
--- a/Documentation/git-index-pack.txt
+++ b/Documentation/git-index-pack.txt
@@ -9,7 +9,7 @@ git-index-pack - Build pack index file for an existing packed archive
'git-index-pack' [-v] [-o <index-file>] <pack-file>
-'git-index-pack' --stdin [--fix-thin] [-v] [-o <index-file>] [<pack-file>]
+'git-index-pack' --stdin [--fix-thin] [--keep] [-v] [-o <index-file>] [<pack-file>]
@@ -38,7 +38,10 @@ OPTIONS
instead and a copy is then written to <pack-file>. If
<pack-file> is not specified, the pack is written to
objects/pack/ directory of the current git repository with
- a default name determined from the pack content.
+ a default name determined from the pack content. If
+ <pack-file> is not specified consider using --keep to
+ prevent a race condition between this process and
+ gitlink::git-repack[1] .
It is possible for gitlink:git-pack-objects[1] to build
@@ -48,7 +51,22 @@ OPTIONS
and they must be included in the pack for that pack to be self
contained and indexable. Without this option any attempt to
index a thin pack will fail. This option only makes sense in
- conjonction with --stdin.
+ conjunction with --stdin.
+ Before moving the index into its final destination
+ create an empty .keep file for the associated pack file.
+ This option is usually necessary with --stdin to prevent a
+ simultaneous gitlink:git-repack[1] process from deleting
+ the newly constructed pack and index before refs can be
+ updated to use objects contained in the pack.
+ Like --keep create a .keep file before moving the index into
+ its final destination, but rather than creating an empty file
+ place 'why' followed by an LF into the .keep file. The 'why'
+ message can later be searched for within all .keep files to
+ locate any which have outlived their usefulness.