diff options
Diffstat (limited to 't/t1404-update-ref-errors.sh')
| -rwxr-xr-x | t/t1404-update-ref-errors.sh | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/t/t1404-update-ref-errors.sh b/t/t1404-update-ref-errors.sh index c34ece48f5..3a887b5113 100755 --- a/t/t1404-update-ref-errors.sh +++ b/t/t1404-update-ref-errors.sh @@ -34,6 +34,81 @@ test_update_rejected () { Q="'" +# Test adding and deleting D/F-conflicting references in a single +# transaction. +df_test() { + prefix="$1" + pack=: symadd=false symdel=false add_del=false addref= delref= + shift + while test $# -gt 0 + do + case "$1" in + --pack) + pack="git pack-refs --all" + shift + ;; + --sym-add) + # Perform the add via a symbolic reference + symadd=true + shift + ;; + --sym-del) + # Perform the del via a symbolic reference + symdel=true + shift + ;; + --del-add) + # Delete first reference then add second + add_del=false + delref="$prefix/r/$2" + addref="$prefix/r/$3" + shift 3 + ;; + --add-del) + # Add first reference then delete second + add_del=true + addref="$prefix/r/$2" + delref="$prefix/r/$3" + shift 3 + ;; + *) + echo 1>&2 "Extra args to df_test: $*" + return 1 + ;; + esac + done + git update-ref "$delref" $C && + if $symadd + then + addname="$prefix/s/symadd" && + git symbolic-ref "$addname" "$addref" + else + addname="$addref" + fi && + if $symdel + then + delname="$prefix/s/symdel" && + git symbolic-ref "$delname" "$delref" + else + delname="$delref" + fi && + cat >expected-err <<-EOF && + fatal: cannot lock ref $Q$addname$Q: $Q$delref$Q exists; cannot create $Q$addref$Q + EOF + $pack && + if $add_del + then + printf "%s\n" "create $addname $D" "delete $delname" + else + printf "%s\n" "delete $delname" "create $addname $D" + fi >commands && + test_must_fail git update-ref --stdin <commands 2>output.err && + test_cmp expected-err output.err && + printf "%s\n" "$C $delref" >expected-refs && + git for-each-ref --format="%(objectname) %(refname)" $prefix/r >actual-refs && + test_cmp expected-refs actual-refs +} + test_expect_success 'setup' ' git commit --allow-empty -m Initial && @@ -188,6 +263,72 @@ test_expect_success 'empty directory should not fool 1-arg delete' ' git update-ref --stdin ' +test_expect_success 'D/F conflict prevents add long + delete short' ' + df_test refs/df-al-ds --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents add short + delete long' ' + df_test refs/df-as-dl --add-del foo foo/bar +' + +test_expect_success 'D/F conflict prevents delete long + add short' ' + df_test refs/df-dl-as --del-add foo/bar foo +' + +test_expect_success 'D/F conflict prevents delete short + add long' ' + df_test refs/df-ds-al --del-add foo foo/bar +' + +test_expect_success 'D/F conflict prevents add long + delete short packed' ' + df_test refs/df-al-dsp --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents add short + delete long packed' ' + df_test refs/df-as-dlp --pack --add-del foo foo/bar +' + +test_expect_success 'D/F conflict prevents delete long packed + add short' ' + df_test refs/df-dlp-as --pack --del-add foo/bar foo +' + +test_expect_success 'D/F conflict prevents delete short packed + add long' ' + df_test refs/df-dsp-al --pack --del-add foo foo/bar +' + +# Try some combinations involving symbolic refs... + +test_expect_success 'D/F conflict prevents indirect add long + delete short' ' + df_test refs/df-ial-ds --sym-add --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add long + indirect delete short' ' + df_test refs/df-ial-ids --sym-add --sym-del --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add short + indirect delete long' ' + df_test refs/df-ias-idl --sym-add --sym-del --add-del foo foo/bar +' + +test_expect_success 'D/F conflict prevents indirect delete long + indirect add short' ' + df_test refs/df-idl-ias --sym-add --sym-del --del-add foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add long + delete short packed' ' + df_test refs/df-ial-dsp --sym-add --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect add long + indirect delete short packed' ' + df_test refs/df-ial-idsp --sym-add --sym-del --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents add long + indirect delete short packed' ' + df_test refs/df-al-idsp --sym-del --pack --add-del foo/bar foo +' + +test_expect_success 'D/F conflict prevents indirect delete long packed + indirect add short' ' + df_test refs/df-idlp-ias --sym-add --sym-del --pack --del-add foo/bar foo +' + # Test various errors when reading the old values of references... test_expect_success 'missing old value blocks update' ' @@ -404,4 +545,77 @@ test_expect_success 'broken reference blocks indirect create' ' test_cmp expected output.err ' +test_expect_success 'no bogus intermediate values during delete' ' + prefix=refs/slow-transaction && + # Set up a reference with differing loose and packed versions: + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # Now try to update the reference, but hold the `packed-refs` lock + # for a while to see what happens while the process is blocked: + : >.git/packed-refs.lock && + test_when_finished "rm -f .git/packed-refs.lock" && + { + # Note: the following command is intentionally run in the + # background. We increase the timeout so that `update-ref` + # attempts to acquire the `packed-refs` lock for longer than + # it takes for us to do the check then delete it: + git -c core.packedrefstimeout=3000 update-ref -d $prefix/foo & + } && + pid2=$! && + # Give update-ref plenty of time to get to the point where it tries + # to lock packed-refs: + sleep 1 && + # Make sure that update-ref did not complete despite the lock: + kill -0 $pid2 && + # Verify that the reference still has its old value: + sha1=$(git rev-parse --verify --quiet $prefix/foo || echo undefined) && + case "$sha1" in + $D) + # This is what we hope for; it means that nothing + # user-visible has changed yet. + : ;; + undefined) + # This is not correct; it means the deletion has happened + # already even though update-ref should not have been + # able to acquire the lock yet. + echo "$prefix/foo deleted prematurely" && + break + ;; + $C) + # This value should never be seen. Probably the loose + # reference has been deleted but the packed reference + # is still there: + echo "$prefix/foo incorrectly observed to be C" && + break + ;; + *) + # WTF? + echo "unexpected value observed for $prefix/foo: $sha1" && + break + ;; + esac >out && + rm -f .git/packed-refs.lock && + wait $pid2 && + test_must_be_empty out && + test_must_fail git rev-parse --verify --quiet $prefix/foo +' + +test_expect_success 'delete fails cleanly if packed-refs file is locked' ' + prefix=refs/locked-packed-refs && + # Set up a reference with differing loose and packed versions: + git update-ref $prefix/foo $C && + git pack-refs --all && + git update-ref $prefix/foo $D && + git for-each-ref $prefix >unchanged && + # Now try to delete it while the `packed-refs` lock is held: + : >.git/packed-refs.lock && + test_when_finished "rm -f .git/packed-refs.lock" && + test_must_fail git update-ref -d $prefix/foo >out 2>err && + git for-each-ref $prefix >actual && + test_i18ngrep "Unable to create $Q.*packed-refs.lock$Q: File exists" err && + test_cmp unchanged actual +' + test_done |