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https://github.com/git/git
synced 2024-08-27 11:39:22 +00:00
![SZEDER Gábor](/assets/img/avatar_default.png)
When 'git name-rev' is invoked with commit-ish parameters, it tries to save some work, and doesn't visit commits older than the committer date of the oldest given commit minus a one day worth of slop. Since our 'timestamp_t' is an unsigned type, this leads to a timestamp underflow when the committer date of the oldest given commit is within a day of the UNIX epoch. As a result the cutoff timestamp ends up far-far in the future, and 'git name-rev' doesn't visit any commits, and names each given commit as 'undefined'. Check whether subtracting the slop from the oldest committer date would lead to an underflow, and use no cutoff in that case. We don't have a TIME_MIN constant,dddbad728c
(timestamp_t: a new data type for timestamps, 2017-04-26) didn't add one, so do it now. Note that the type of the cutoff timestamp variable used to be signed before5589e87fd8
(name-rev: change a "long" variable to timestamp_t, 2017-05-20). The behavior was still the same even back then, but the underflow didn't happen when substracting the slop from the oldest committer date, but when comparing the signed cutoff timestamp with unsigned committer dates in name_rev(). IOW, this underflow bug is as old as 'git name-rev' itself. Helped-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
443 lines
12 KiB
Bash
Executable file
443 lines
12 KiB
Bash
Executable file
#!/bin/sh
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test_description='test describe
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B
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.--------------o----o----o----x
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/ / /
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o----o----o----o----o----. /
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\ A c /
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.------------o---o---o
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D,R e
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'
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. ./test-lib.sh
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check_describe () {
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expect="$1"
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shift
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R=$(git describe "$@" 2>err.actual)
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S=$?
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cat err.actual >&3
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test_expect_success "describe $*" '
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test $S = 0 &&
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case "$R" in
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$expect) echo happy ;;
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*) echo "Oops - $R is not $expect";
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false ;;
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esac
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'
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}
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test_expect_success setup '
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test_tick &&
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echo one >file && git add file && git commit -m initial &&
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one=$(git rev-parse HEAD) &&
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git describe --always HEAD &&
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test_tick &&
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echo two >file && git add file && git commit -m second &&
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two=$(git rev-parse HEAD) &&
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test_tick &&
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echo three >file && git add file && git commit -m third &&
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test_tick &&
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echo A >file && git add file && git commit -m A &&
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test_tick &&
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git tag -a -m A A &&
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test_tick &&
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echo c >file && git add file && git commit -m c &&
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test_tick &&
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git tag c &&
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git reset --hard $two &&
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test_tick &&
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echo B >side && git add side && git commit -m B &&
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test_tick &&
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git tag -a -m B B &&
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test_tick &&
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git merge -m Merged c &&
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merged=$(git rev-parse HEAD) &&
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git reset --hard $two &&
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test_tick &&
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echo D >another && git add another && git commit -m D &&
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test_tick &&
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git tag -a -m D D &&
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test_tick &&
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git tag -a -m R R &&
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test_tick &&
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echo DD >another && git commit -a -m another &&
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test_tick &&
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git tag e &&
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test_tick &&
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echo DDD >another && git commit -a -m "yet another" &&
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test_tick &&
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git merge -m Merged $merged &&
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test_tick &&
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echo X >file && echo X >side && git add file side &&
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git commit -m x
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'
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check_describe A-* HEAD
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check_describe A-* HEAD^
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check_describe R-* HEAD^^
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check_describe A-* HEAD^^2
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check_describe B HEAD^^2^
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check_describe R-* HEAD^^^
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check_describe c-* --tags HEAD
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check_describe c-* --tags HEAD^
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check_describe e-* --tags HEAD^^
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check_describe c-* --tags HEAD^^2
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check_describe B --tags HEAD^^2^
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check_describe e --tags HEAD^^^
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check_describe heads/master --all HEAD
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check_describe tags/c-* --all HEAD^
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check_describe tags/e --all HEAD^^^
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check_describe B-0-* --long HEAD^^2^
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check_describe A-3-* --long HEAD^^2
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check_describe c-7-* --tags
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check_describe e-3-* --first-parent --tags
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test_expect_success 'describe --contains defaults to HEAD without commit-ish' '
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echo "A^0" >expect &&
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git checkout A &&
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test_when_finished "git checkout -" &&
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git describe --contains >actual &&
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test_cmp expect actual
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'
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check_describe tags/A --all A^0
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test_expect_success 'no warning was displayed for A' '
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test_must_be_empty err.actual
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'
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test_expect_success 'rename tag A to Q locally' '
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mv .git/refs/tags/A .git/refs/tags/Q
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'
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cat - >err.expect <<EOF
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warning: tag 'A' is really 'Q' here
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EOF
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check_describe A-* HEAD
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test_expect_success 'warning was displayed for Q' '
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test_i18ncmp err.expect err.actual
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'
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test_expect_success 'rename tag Q back to A' '
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mv .git/refs/tags/Q .git/refs/tags/A
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'
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test_expect_success 'pack tag refs' 'git pack-refs'
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check_describe A-* HEAD
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test_expect_success 'describe works from outside repo using --git-dir' '
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git clone --bare "$TRASH_DIRECTORY" "$TRASH_DIRECTORY/bare" &&
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git --git-dir "$TRASH_DIRECTORY/bare" describe >out &&
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grep -E "^A-[1-9][0-9]?-g[0-9a-f]+$" out
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'
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check_describe "A-*[0-9a-f]" --dirty
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test_expect_success 'describe --dirty with --work-tree' '
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(
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cd "$TEST_DIRECTORY" &&
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git --git-dir "$TRASH_DIRECTORY/.git" --work-tree "$TRASH_DIRECTORY" describe --dirty >"$TRASH_DIRECTORY/out"
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) &&
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grep -E "^A-[1-9][0-9]?-g[0-9a-f]+$" out
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'
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test_expect_success 'set-up dirty work tree' '
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echo >>file
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'
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check_describe "A-*[0-9a-f]-dirty" --dirty
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test_expect_success 'describe --dirty with --work-tree (dirty)' '
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(
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cd "$TEST_DIRECTORY" &&
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git --git-dir "$TRASH_DIRECTORY/.git" --work-tree "$TRASH_DIRECTORY" describe --dirty >"$TRASH_DIRECTORY/out"
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) &&
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grep -E "^A-[1-9][0-9]?-g[0-9a-f]+-dirty$" out
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'
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check_describe "A-*[0-9a-f].mod" --dirty=.mod
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test_expect_success 'describe --dirty=.mod with --work-tree (dirty)' '
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(
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cd "$TEST_DIRECTORY" &&
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git --git-dir "$TRASH_DIRECTORY/.git" --work-tree "$TRASH_DIRECTORY" describe --dirty=.mod >"$TRASH_DIRECTORY/out"
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) &&
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grep -E "^A-[1-9][0-9]?-g[0-9a-f]+.mod$" out
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'
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test_expect_success 'describe --dirty HEAD' '
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test_must_fail git describe --dirty HEAD
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'
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test_expect_success 'set-up matching pattern tests' '
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git tag -a -m test-annotated test-annotated &&
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echo >>file &&
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test_tick &&
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git commit -a -m "one more" &&
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git tag test1-lightweight &&
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echo >>file &&
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test_tick &&
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git commit -a -m "yet another" &&
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git tag test2-lightweight &&
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echo >>file &&
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test_tick &&
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git commit -a -m "even more"
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'
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check_describe "test-annotated-*" --match="test-*"
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check_describe "test1-lightweight-*" --tags --match="test1-*"
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check_describe "test2-lightweight-*" --tags --match="test2-*"
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check_describe "test2-lightweight-*" --long --tags --match="test2-*" HEAD^
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check_describe "test2-lightweight-*" --long --tags --match="test1-*" --match="test2-*" HEAD^
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check_describe "test2-lightweight-*" --long --tags --match="test1-*" --no-match --match="test2-*" HEAD^
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check_describe "test1-lightweight-*" --long --tags --match="test1-*" --match="test3-*" HEAD
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check_describe "test1-lightweight-*" --long --tags --match="test3-*" --match="test1-*" HEAD
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test_expect_success 'set-up branches' '
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git branch branch_A A &&
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git branch branch_C c &&
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git update-ref refs/remotes/origin/remote_branch_A "A^{commit}" &&
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git update-ref refs/remotes/origin/remote_branch_C "c^{commit}" &&
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git update-ref refs/original/original_branch_A test-annotated~2
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'
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check_describe "heads/branch_A*" --all --match="branch_*" --exclude="branch_C" HEAD
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check_describe "remotes/origin/remote_branch_A*" --all --match="origin/remote_branch_*" --exclude="origin/remote_branch_C" HEAD
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check_describe "original/original_branch_A*" --all test-annotated~1
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test_expect_success '--match does not work for other types' '
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test_must_fail git describe --all --match="*original_branch_*" test-annotated~1
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'
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test_expect_success '--exclude does not work for other types' '
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R=$(git describe --all --exclude="any_pattern_even_not_matching" test-annotated~1) &&
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case "$R" in
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*original_branch_A*) echo "fail: Found unknown reference $R with --exclude"
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false;;
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*) echo ok: Found some known type;;
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esac
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'
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test_expect_success 'name-rev with exact tags' '
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echo A >expect &&
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tag_object=$(git rev-parse refs/tags/A) &&
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git name-rev --tags --name-only $tag_object >actual &&
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test_cmp expect actual &&
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echo "A^0" >expect &&
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tagged_commit=$(git rev-parse "refs/tags/A^0") &&
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git name-rev --tags --name-only $tagged_commit >actual &&
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test_cmp expect actual
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'
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test_expect_success 'name-rev --all' '
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>expect.unsorted &&
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for rev in $(git rev-list --all)
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do
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git name-rev $rev >>expect.unsorted
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done &&
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sort <expect.unsorted >expect &&
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git name-rev --all >actual.unsorted &&
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sort <actual.unsorted >actual &&
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test_cmp expect actual
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'
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test_expect_success 'name-rev --stdin' '
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>expect.unsorted &&
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for rev in $(git rev-list --all)
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do
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name=$(git name-rev --name-only $rev) &&
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echo "$rev ($name)" >>expect.unsorted
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done &&
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sort <expect.unsorted >expect &&
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git rev-list --all | git name-rev --stdin >actual.unsorted &&
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sort <actual.unsorted >actual &&
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test_cmp expect actual
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'
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test_expect_success 'describe --contains with the exact tags' '
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echo "A^0" >expect &&
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tag_object=$(git rev-parse refs/tags/A) &&
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git describe --contains $tag_object >actual &&
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test_cmp expect actual &&
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echo "A^0" >expect &&
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tagged_commit=$(git rev-parse "refs/tags/A^0") &&
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git describe --contains $tagged_commit >actual &&
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test_cmp expect actual
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'
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test_expect_success 'describe --contains and --match' '
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echo "A^0" >expect &&
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tagged_commit=$(git rev-parse "refs/tags/A^0") &&
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test_must_fail git describe --contains --match="B" $tagged_commit &&
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git describe --contains --match="B" --match="A" $tagged_commit >actual &&
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test_cmp expect actual
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'
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test_expect_success 'describe --exclude' '
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echo "c~1" >expect &&
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tagged_commit=$(git rev-parse "refs/tags/A^0") &&
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test_must_fail git describe --contains --match="B" $tagged_commit &&
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git describe --contains --match="?" --exclude="A" $tagged_commit >actual &&
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test_cmp expect actual
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'
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test_expect_success 'describe --contains and --no-match' '
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echo "A^0" >expect &&
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tagged_commit=$(git rev-parse "refs/tags/A^0") &&
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git describe --contains --match="B" --no-match $tagged_commit >actual &&
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test_cmp expect actual
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'
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test_expect_success 'setup and absorb a submodule' '
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test_create_repo sub1 &&
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test_commit -C sub1 initial &&
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git submodule add ./sub1 &&
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git submodule absorbgitdirs &&
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git commit -a -m "add submodule" &&
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git describe --dirty >expect &&
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git describe --broken >out &&
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test_cmp expect out
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'
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test_expect_success 'describe chokes on severely broken submodules' '
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mv .git/modules/sub1/ .git/modules/sub_moved &&
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test_must_fail git describe --dirty
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'
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test_expect_success 'describe ignoring a broken submodule' '
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git describe --broken >out &&
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grep broken out
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'
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test_expect_success 'describe with --work-tree ignoring a broken submodule' '
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(
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cd "$TEST_DIRECTORY" &&
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git --git-dir "$TRASH_DIRECTORY/.git" --work-tree "$TRASH_DIRECTORY" describe --broken >"$TRASH_DIRECTORY/out"
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) &&
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test_when_finished "mv .git/modules/sub_moved .git/modules/sub1" &&
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grep broken out
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'
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test_expect_success 'describe a blob at a directly tagged commit' '
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echo "make it a unique blob" >file &&
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git add file && git commit -m "content in file" &&
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git tag -a -m "latest annotated tag" unique-file &&
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git describe HEAD:file >actual &&
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echo "unique-file:file" >expect &&
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test_cmp expect actual
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'
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test_expect_success 'describe a blob with its first introduction' '
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git commit --allow-empty -m "empty commit" &&
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git rm file &&
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git commit -m "delete blob" &&
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git revert HEAD &&
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git commit --allow-empty -m "empty commit" &&
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git describe HEAD:file >actual &&
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echo "unique-file:file" >expect &&
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test_cmp expect actual
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'
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test_expect_success 'describe directly tagged blob' '
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git tag test-blob unique-file:file &&
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git describe test-blob >actual &&
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echo "unique-file:file" >expect &&
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# suboptimal: we rather want to see "test-blob"
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test_cmp expect actual
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'
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test_expect_success 'describe tag object' '
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git tag test-blob-1 -a -m msg unique-file:file &&
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test_must_fail git describe test-blob-1 2>actual &&
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test_i18ngrep "fatal: test-blob-1 is neither a commit nor blob" actual
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'
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test_expect_failure ULIMIT_STACK_SIZE 'name-rev works in a deep repo' '
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i=1 &&
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while test $i -lt 8000
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do
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echo "commit refs/heads/master
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committer A U Thor <author@example.com> $((1000000000 + $i * 100)) +0200
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data <<EOF
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commit #$i
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EOF"
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test $i = 1 && echo "from refs/heads/master^0"
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i=$(($i + 1))
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done | git fast-import &&
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git checkout master &&
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git tag far-far-away HEAD^ &&
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echo "HEAD~4000 tags/far-far-away~3999" >expect &&
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git name-rev HEAD~4000 >actual &&
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test_cmp expect actual &&
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run_with_limited_stack git name-rev HEAD~4000 >actual &&
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test_cmp expect actual
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'
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test_expect_success ULIMIT_STACK_SIZE 'describe works in a deep repo' '
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git tag -f far-far-away HEAD~7999 &&
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echo "far-far-away" >expect &&
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git describe --tags --abbrev=0 HEAD~4000 >actual &&
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test_cmp expect actual &&
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run_with_limited_stack git describe --tags --abbrev=0 HEAD~4000 >actual &&
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test_cmp expect actual
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'
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check_describe tags/A --all A
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check_describe tags/c --all c
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check_describe heads/branch_A --all --match='branch_*' branch_A
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test_expect_success 'describe complains about tree object' '
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test_must_fail git describe HEAD^{tree}
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'
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test_expect_success 'describe complains about missing object' '
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test_must_fail git describe $ZERO_OID
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'
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test_expect_success 'name-rev a rev shortly after epoch' '
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test_when_finished "git checkout master" &&
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git checkout --orphan no-timestamp-underflow &&
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# Any date closer to epoch than the CUTOFF_DATE_SLOP constant
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# in builtin/name-rev.c.
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GIT_COMMITTER_DATE="@1234 +0000" \
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git commit -m "committer date shortly after epoch" &&
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old_commit_oid=$(git rev-parse HEAD) &&
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echo "$old_commit_oid no-timestamp-underflow" >expect &&
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git name-rev $old_commit_oid >actual &&
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test_cmp expect actual
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'
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test_done
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