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https://github.com/git/git
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e5256c82e5
In order to not repeatedly search for the reference-transaction hook in case it's getting called multiple times, we use a caching mechanism to only call `find_hook()` once. What was missed though is that the return value of `find_hook()` actually comes from a static strbuf, which means it will get overwritten when calling `find_hook()` again. As a result, we may call the wrong hook with parameters of the reference-transaction hook. This scenario was spotted in the wild when executing a git-push(1) with multiple references, where there are interleaving calls to both the update and the reference-transaction hook. While initial calls to the reference-transaction hook work as expected, it will stop working after the next invocation of the update hook. The result is that we now start calling the update hook with parameters and stdin of the reference-transaction hook. This commit fixes the issue by storing a copy of `find_hook()`'s return value in the cache. Signed-off-by: Junio C Hamano <gitster@pobox.com>
135 lines
3.3 KiB
Bash
Executable file
135 lines
3.3 KiB
Bash
Executable file
#!/bin/sh
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test_description='reference transaction hooks'
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. ./test-lib.sh
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test_expect_success setup '
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mkdir -p .git/hooks &&
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test_commit PRE &&
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test_commit POST &&
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POST_OID=$(git rev-parse POST)
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'
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test_expect_success 'hook allows updating ref if successful' '
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test_when_finished "rm .git/hooks/reference-transaction" &&
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git reset --hard PRE &&
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write_script .git/hooks/reference-transaction <<-\EOF &&
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echo "$*" >>actual
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EOF
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cat >expect <<-EOF &&
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prepared
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committed
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EOF
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git update-ref HEAD POST &&
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test_cmp expect actual
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'
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test_expect_success 'hook aborts updating ref in prepared state' '
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test_when_finished "rm .git/hooks/reference-transaction" &&
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git reset --hard PRE &&
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write_script .git/hooks/reference-transaction <<-\EOF &&
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if test "$1" = prepared
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then
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exit 1
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fi
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EOF
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test_must_fail git update-ref HEAD POST 2>err &&
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test_i18ngrep "ref updates aborted by hook" err
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'
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test_expect_success 'hook gets all queued updates in prepared state' '
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test_when_finished "rm .git/hooks/reference-transaction actual" &&
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git reset --hard PRE &&
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write_script .git/hooks/reference-transaction <<-\EOF &&
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if test "$1" = prepared
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then
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while read -r line
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do
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printf "%s\n" "$line"
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done >actual
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fi
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EOF
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cat >expect <<-EOF &&
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$ZERO_OID $POST_OID HEAD
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$ZERO_OID $POST_OID refs/heads/master
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EOF
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git update-ref HEAD POST <<-EOF &&
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update HEAD $ZERO_OID $POST_OID
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update refs/heads/master $ZERO_OID $POST_OID
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EOF
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test_cmp expect actual
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'
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test_expect_success 'hook gets all queued updates in committed state' '
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test_when_finished "rm .git/hooks/reference-transaction actual" &&
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git reset --hard PRE &&
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write_script .git/hooks/reference-transaction <<-\EOF &&
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if test "$1" = committed
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then
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while read -r line
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do
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printf "%s\n" "$line"
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done >actual
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fi
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EOF
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cat >expect <<-EOF &&
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$ZERO_OID $POST_OID HEAD
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$ZERO_OID $POST_OID refs/heads/master
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EOF
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git update-ref HEAD POST &&
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test_cmp expect actual
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'
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test_expect_success 'hook gets all queued updates in aborted state' '
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test_when_finished "rm .git/hooks/reference-transaction actual" &&
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git reset --hard PRE &&
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write_script .git/hooks/reference-transaction <<-\EOF &&
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if test "$1" = aborted
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then
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while read -r line
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do
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printf "%s\n" "$line"
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done >actual
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fi
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EOF
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cat >expect <<-EOF &&
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$ZERO_OID $POST_OID HEAD
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$ZERO_OID $POST_OID refs/heads/master
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EOF
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git update-ref --stdin <<-EOF &&
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start
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update HEAD POST $ZERO_OID
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update refs/heads/master POST $ZERO_OID
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abort
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EOF
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test_cmp expect actual
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'
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test_expect_success 'interleaving hook calls succeed' '
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test_when_finished "rm -r target-repo.git" &&
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git init --bare target-repo.git &&
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write_script target-repo.git/hooks/reference-transaction <<-\EOF &&
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echo $0 "$@" >>actual
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EOF
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write_script target-repo.git/hooks/update <<-\EOF &&
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echo $0 "$@" >>actual
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EOF
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cat >expect <<-EOF &&
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hooks/update refs/tags/PRE 0000000000000000000000000000000000000000 63ac8e7bcdb882293465435909f54a96de17d4f7
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hooks/reference-transaction prepared
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hooks/reference-transaction committed
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hooks/update refs/tags/POST 0000000000000000000000000000000000000000 99d53161c3a0a903b6561b9f6c0c665b3a476401
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hooks/reference-transaction prepared
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hooks/reference-transaction committed
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EOF
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git push ./target-repo.git PRE POST &&
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test_cmp expect target-repo.git/actual
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'
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test_done
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