git/git-prune-script
Junio C Hamano ae7c0c92c0 Git-prune-script loses blobs referenced from an uncommitted cache.
(updated from the version posted to GIT mailing list).

When a new blob is registered with update-cache, and before the cache
is written as a tree and committed, git-fsck-cache will find the blob
unreachable.  This patch adds a new flag, "--cache" to git-fsck-cache,
with which it keeps such blobs from considered "unreachable".

The git-prune-script is updated to use this new flag.  At the same time
it adds .git/refs/*/* to the set of default locations to look for heads,
which should be consistent with expectations from Cogito users.

Without this fix, "diff-cache -p --cached" after git-prune-script has
pruned the blob object will fail mysteriously and git-write-tree would
also fail.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-05-04 01:33:33 -07:00

38 lines
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#!/bin/sh
dryrun=
while case "$#" in 0) break ;; esac
do
case "$1" in
-n) dryrun=echo ;;
--) break ;;
-*) echo >&2 "usage: git-prune-script [ -n ] [ heads... ]"; exit 1 ;;
*) break ;;
esac
shift;
done
# Defaulting to include .git/refs/*/* may be debatable from the
# purist POV but power users can always give explicit parameters
# to the script anyway.
case "$#" in
0)
x_40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
x_40="$x_40$x_40$x_40$x_40$x_40$x_40$x_40$x_40"
set x $(sed -ne "/^$x_40\$/p" .git/HEAD .git/refs/*/* 2>/dev/null)
shift ;;
esac
git-fsck-cache --cache --unreachable "$@" |
sed -ne '/unreachable /{
s/unreachable [^ ][^ ]* //
s|\(..\)|\1/|p
}' | {
case "$SHA1_FILE_DIRECTORY" in
'') cd .git/objects/ ;;
*) cd "$SHA1_FILE_DIRECTORY" ;;
esac || exit
xargs -r $dryrun rm -f
}