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1389d9ddaa
The logic in an earlier round to detect reflog entries that point at a broken commit was not sufficient. Just like we do not trust presense of a commit during pack transfer (we trust only our refs), we should not trust a commit's presense, even if the tree of that commit is complete. A repository that had reflog enabled on some of the refs that was rewound and then run git-repack or git-prune from older versions of git can have reflog entries that point at a commit that still exist but lack commits (or trees and blobs needed for that commit) between it and some commit that is reachable from one of the refs. This revamps the logic -- the definition of "broken commit" becomes: a commit that is not reachable from any of the refs and there is a missing object among the commit, tree, or blob objects reachable from it that is not reachable from any of the refs. Entries in the reflog that refer to such a commit are expired. Since this computation involves traversing all the reachable objects, i.e. it has the same cost as 'git prune', it is enabled only when a new option --fix-stale. Fortunately, once this is run, we should not have to ever worry about missing objects, because the current prune and pack-objects know about reflogs and protect objects referred by them. Unfortunately, this will be absolutely necessary to help people migrate to the newer prune and repack. Signed-off-by: Junio C Hamano <junkio@cox.net>
176 lines
3.1 KiB
Bash
Executable file
176 lines
3.1 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2007 Junio C Hamano
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#
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test_description='Test prune and reflog expiration'
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. ./test-lib.sh
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check_have () {
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gaah= &&
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for N in "$@"
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do
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eval "o=\$$N" && git cat-file -t $o || {
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echo Gaah $N
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gaah=$N
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break
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}
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done &&
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test -z "$gaah"
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}
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check_fsck () {
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output=$(git fsck-objects --full)
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case "$1" in
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'')
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test -z "$output" ;;
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*)
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echo "$output" | grep "$1" ;;
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esac
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}
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corrupt () {
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aa=${1%??????????????????????????????????????} zz=${1#??}
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mv .git/objects/$aa/$zz .git/$aa$zz
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}
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recover () {
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aa=${1%??????????????????????????????????????} zz=${1#??}
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mkdir -p .git/objects/$aa
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mv .git/$aa$zz .git/objects/$aa/$zz
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}
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check_dont_have () {
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gaah= &&
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for N in "$@"
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do
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eval "o=\$$N"
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git cat-file -t $o && {
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echo Gaah $N
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gaah=$N
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break
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}
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done
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test -z "$gaah"
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}
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test_expect_success setup '
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mkdir -p A/B &&
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echo rat >C &&
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echo ox >A/D &&
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echo tiger >A/B/E &&
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git add . &&
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test_tick && git commit -m rabbit &&
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H=`git rev-parse --verify HEAD` &&
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A=`git rev-parse --verify HEAD:A` &&
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B=`git rev-parse --verify HEAD:A/B` &&
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C=`git rev-parse --verify HEAD:C` &&
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D=`git rev-parse --verify HEAD:A/D` &&
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E=`git rev-parse --verify HEAD:A/B/E` &&
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check_fsck &&
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chmod +x C &&
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git add C &&
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test_tick && git commit -m dragon &&
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L=`git rev-parse --verify HEAD` &&
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check_fsck &&
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rm -f C A/B/E &&
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echo snake >F &&
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echo horse >A/G &&
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git add F A/G &&
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test_tick && git commit -a -m sheep &&
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F=`git rev-parse --verify HEAD:F` &&
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G=`git rev-parse --verify HEAD:A/G` &&
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I=`git rev-parse --verify HEAD:A` &&
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J=`git rev-parse --verify HEAD` &&
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check_fsck &&
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rm -f A/G &&
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test_tick && git commit -a -m monkey &&
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K=`git rev-parse --verify HEAD` &&
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check_fsck &&
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check_have A B C D E F G H I J K L &&
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git prune &&
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check_have A B C D E F G H I J K L &&
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check_fsck &&
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loglen=$(wc -l <.git/logs/refs/heads/master) &&
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test $loglen = 4
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'
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test_expect_success rewind '
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test_tick && git reset --hard HEAD~2 &&
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test -f C &&
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test -f A/B/E &&
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! test -f F &&
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! test -f A/G &&
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check_have A B C D E F G H I J K L &&
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git prune &&
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check_have A B C D E F G H I J K L &&
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loglen=$(wc -l <.git/logs/refs/heads/master) &&
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test $loglen = 5
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'
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test_expect_success 'corrupt and check' '
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corrupt $F &&
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check_fsck "missing blob $F"
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'
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test_expect_success 'reflog expire --dry-run should not touch reflog' '
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git reflog expire --dry-run \
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--expire=$(($test_tick - 10000)) \
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--expire-unreachable=$(($test_tick - 10000)) \
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--stale-fix \
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--all &&
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loglen=$(wc -l <.git/logs/refs/heads/master) &&
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test $loglen = 5 &&
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check_fsck "missing blob $F"
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'
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test_expect_success 'reflog expire' '
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git reflog expire --verbose \
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--expire=$(($test_tick - 10000)) \
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--expire-unreachable=$(($test_tick - 10000)) \
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--stale-fix \
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--all &&
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loglen=$(wc -l <.git/logs/refs/heads/master) &&
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test $loglen = 2 &&
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check_fsck "dangling commit $K"
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'
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test_expect_success 'prune and fsck' '
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git prune &&
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check_fsck &&
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check_have A B C D E H L &&
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check_dont_have F G I J K
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'
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test_expect_success 'recover and check' '
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recover $F &&
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check_fsck "dangling blob $F"
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'
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test_done
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