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repack: modify behavior of -A option to leave unreferenced objects unpacked

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The previous behavior of the -A option was to retain any previously
packed objects which had become unreferenced, and place them into the newly
created pack file.  Since git-gc, when run automatically with the --auto
option, calls repack with the -A option, this had the effect of retaining
unreferenced packed objects indefinitely. To avoid this scenario, the
user was required to run git-gc with the little known --prune option or
to manually run repack with the -a option.

This patch changes the behavior of the -A option so that unreferenced
objects that exist in any pack file being replaced, will be unpacked into
the repository. The unreferenced loose objects can then be garbage collected
by git-gc (i.e. git-prune) based on the gc.pruneExpire setting.

Also add new tests for checking whether unreferenced objects which were
previously packed are properly left in the repository unpacked after
repacking.

Signed-off-by: Brandon Casey <drafnel@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Casey 2008-05-09 23:01:55 -05:00 committed by Junio C Hamano
parent 1f8115b113
commit ccc1297226
2 changed files with 60 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
git-repack.sh
View File

@ -30,7 +30,7 @@ do
-n) no_update_info=t ;;
-a) all_into_one=t ;;
-A) all_into_one=t
keep_unreachable=--keep-unreachable ;;
keep_unreachable=t ;;
-d) remove_redundant=t ;;
-q) quiet=-q ;;
-f) no_reuse=--no-reuse-object ;;
@ -78,9 +78,6 @@ case ",$all_into_one," in
if test -z "$args"
then
args='--unpacked --incremental'
elif test -n "$keep_unreachable"
then
args="$args $keep_unreachable"
fi
;;
esac
@ -130,7 +127,18 @@ then
do
case " $fullbases " in
*" $e "*) ;;
*) rm -f "$e.pack" "$e.idx" "$e.keep" ;;
*)
rm -f "$e.idx" "$e.keep"
if test -n "$keep_unreachable" &&
test -f "$e.pack"
then
git unpack-objects < "$e.pack" || {
echo >&2 "Failed unpacking unreachable objects from redundant pack file $e.pack"
exit 1
}
fi
rm -f "$e.pack"
;;
esac
done
)

47
t/t7701-repack-unpack-unreachable.sh Executable file
View File

@ -0,0 +1,47 @@
#!/bin/sh
test_description='git-repack works correctly'
. ./test-lib.sh
test_expect_success '-A option leaves unreachable objects unpacked' '
echo content > file1 &&
git add . &&
git commit -m initial_commit &&
# create a transient branch with unique content
git checkout -b transient_branch &&
echo more content >> file1 &&
# record the objects created in the database for file, commit, tree
fsha1=$(git hash-object file1) &&
git commit -a -m more_content &&
csha1=$(git rev-parse HEAD^{commit}) &&
tsha1=$(git rev-parse HEAD^{tree}) &&
git checkout master &&
echo even more content >> file1 &&
git commit -a -m even_more_content &&
# delete the transient branch
git branch -D transient_branch &&
# pack the repo
git repack -A -d -l &&
# verify objects are packed in repository
test 3 = $(git verify-pack -v -- .git/objects/pack/*.idx |
grep -e "^$fsha1 " -e "^$csha1 " -e "^$tsha1 " |
sort | uniq | wc -l) &&
git show $fsha1 &&
git show $csha1 &&
git show $tsha1 &&
# now expire the reflog
sleep 1 &&
git reflog expire --expire-unreachable=now --all &&
# and repack
git repack -A -d -l &&
# verify objects are retained unpacked
test 0 = $(git verify-pack -v -- .git/objects/pack/*.idx |
grep -e "^$fsha1 " -e "^$csha1 " -e "^$tsha1 " |
sort | uniq | wc -l) &&
git show $fsha1 &&
git show $csha1 &&
git show $tsha1
'
test_done