04ede97211
You can feed absolute garbage to symbolic-ref as a target like:
git symbolic-ref HEAD refs/heads/foo..bar
While this doesn't technically break the repo entirely (our "is it a git
directory" detector looks only for "refs/" at the start), we would never
resolve such a ref, as the ".." is invalid within a refname.
Let's flag these as invalid at creation time to help the caller realize
that what they're asking for is bogus.
A few notes:
- We use REFNAME_ALLOW_ONELEVEL here, which lets:
git update-ref refs/heads/foo FETCH_HEAD
continue to work. It's unclear whether anybody wants to do something
so odd, but it does work now, so this is erring on the conservative
side. There's a test to make sure we didn't accidentally break this,
but don't take that test as an endorsement that it's a good idea, or
something we might not change in the future.
- The test in t4202-log.sh checks how we handle such an invalid ref on
the reading side, so it has to be updated to touch the HEAD file
directly.
- We need to keep our HEAD-specific check for "does it start with
refs/". The ALLOW_ONELEVEL flag means we won't be enforcing that for
other refs, but HEAD is special here because of the checks in
validate_headref().
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
179 lines
5.1 KiB
Bash
Executable File
179 lines
5.1 KiB
Bash
Executable File
#!/bin/sh
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test_description='basic symbolic-ref tests'
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TEST_PASSES_SANITIZE_LEAK=true
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. ./test-lib.sh
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# If the tests munging HEAD fail, they can break detection of
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# the git repo, meaning that further tests will operate on
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# the surrounding git repo instead of the trash directory.
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reset_to_sane() {
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rm -rf .git &&
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"$TAR" xf .git.tar
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}
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test_expect_success 'setup' '
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git symbolic-ref HEAD refs/heads/foo &&
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test_commit file &&
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"$TAR" cf .git.tar .git/
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'
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test_expect_success 'symbolic-ref read/write roundtrip' '
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git symbolic-ref HEAD refs/heads/read-write-roundtrip &&
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echo refs/heads/read-write-roundtrip >expect &&
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git symbolic-ref HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'symbolic-ref refuses non-ref for HEAD' '
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test_must_fail git symbolic-ref HEAD foo
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'
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reset_to_sane
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test_expect_success 'symbolic-ref refuses bare sha1' '
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test_must_fail git symbolic-ref HEAD $(git rev-parse HEAD)
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'
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reset_to_sane
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test_expect_success 'HEAD cannot be removed' '
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test_must_fail git symbolic-ref -d HEAD
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'
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reset_to_sane
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test_expect_success 'symbolic-ref can be deleted' '
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git symbolic-ref NOTHEAD refs/heads/foo &&
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git symbolic-ref -d NOTHEAD &&
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git rev-parse refs/heads/foo &&
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test_must_fail git symbolic-ref NOTHEAD
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'
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reset_to_sane
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test_expect_success 'symbolic-ref can delete dangling symref' '
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git symbolic-ref NOTHEAD refs/heads/missing &&
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git symbolic-ref -d NOTHEAD &&
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test_must_fail git rev-parse refs/heads/missing &&
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test_must_fail git symbolic-ref NOTHEAD
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'
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reset_to_sane
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test_expect_success 'symbolic-ref fails to delete missing FOO' '
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echo "fatal: Cannot delete FOO, not a symbolic ref" >expect &&
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test_must_fail git symbolic-ref -d FOO >actual 2>&1 &&
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test_cmp expect actual
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'
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reset_to_sane
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test_expect_success 'symbolic-ref fails to delete real ref' '
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echo "fatal: Cannot delete refs/heads/foo, not a symbolic ref" >expect &&
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test_must_fail git symbolic-ref -d refs/heads/foo >actual 2>&1 &&
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git rev-parse --verify refs/heads/foo &&
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test_cmp expect actual
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'
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reset_to_sane
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test_expect_success 'create large ref name' '
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# make 256+ character ref; some systems may not handle that,
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# so be gentle
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long=0123456789abcdef &&
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long=$long/$long/$long/$long &&
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long=$long/$long/$long/$long &&
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long_ref=refs/heads/$long &&
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tree=$(git write-tree) &&
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commit=$(echo foo | git commit-tree $tree) &&
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if git update-ref $long_ref $commit; then
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test_set_prereq LONG_REF
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else
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echo >&2 "long refs not supported"
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fi
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'
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test_expect_success LONG_REF 'symbolic-ref can point to large ref name' '
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git symbolic-ref HEAD $long_ref &&
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echo $long_ref >expect &&
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git symbolic-ref HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success LONG_REF 'we can parse long symbolic ref' '
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echo $commit >expect &&
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git rev-parse --verify HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'symbolic-ref reports failure in exit code' '
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test_when_finished "rm -f .git/HEAD.lock" &&
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>.git/HEAD.lock &&
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test_must_fail git symbolic-ref HEAD refs/heads/whatever
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'
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test_expect_success 'symbolic-ref writes reflog entry' '
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git checkout -b log1 &&
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test_commit one &&
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git checkout -b log2 &&
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test_commit two &&
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git checkout --orphan orphan &&
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git symbolic-ref -m create HEAD refs/heads/log1 &&
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git symbolic-ref -m update HEAD refs/heads/log2 &&
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cat >expect <<-\EOF &&
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update
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create
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EOF
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git log --format=%gs -g -2 >actual &&
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test_cmp expect actual
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'
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test_expect_success 'symbolic-ref does not create ref d/f conflicts' '
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git checkout -b df &&
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test_commit df &&
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test_must_fail git symbolic-ref refs/heads/df/conflict refs/heads/df &&
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git pack-refs --all --prune &&
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test_must_fail git symbolic-ref refs/heads/df/conflict refs/heads/df
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'
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test_expect_success 'symbolic-ref can overwrite pointer to invalid name' '
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test_when_finished reset_to_sane &&
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head=$(git rev-parse HEAD) &&
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git symbolic-ref HEAD refs/heads/outer &&
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test_when_finished "git update-ref -d refs/heads/outer/inner" &&
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git update-ref refs/heads/outer/inner $head &&
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git symbolic-ref HEAD refs/heads/unrelated
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'
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test_expect_success 'symbolic-ref can resolve d/f name (EISDIR)' '
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test_when_finished reset_to_sane &&
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head=$(git rev-parse HEAD) &&
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git symbolic-ref HEAD refs/heads/outer/inner &&
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test_when_finished "git update-ref -d refs/heads/outer" &&
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git update-ref refs/heads/outer $head &&
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echo refs/heads/outer/inner >expect &&
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git symbolic-ref HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'symbolic-ref can resolve d/f name (ENOTDIR)' '
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test_when_finished reset_to_sane &&
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head=$(git rev-parse HEAD) &&
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git symbolic-ref HEAD refs/heads/outer &&
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test_when_finished "git update-ref -d refs/heads/outer/inner" &&
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git update-ref refs/heads/outer/inner $head &&
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echo refs/heads/outer >expect &&
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git symbolic-ref HEAD >actual &&
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test_cmp expect actual
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'
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test_expect_success 'symbolic-ref refuses invalid target for non-HEAD' '
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test_must_fail git symbolic-ref refs/heads/invalid foo..bar
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'
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test_expect_success 'symbolic-ref allows top-level target for non-HEAD' '
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git symbolic-ref refs/heads/top-level FETCH_HEAD &&
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git update-ref FETCH_HEAD HEAD &&
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test_cmp_rev top-level HEAD
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'
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test_done
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