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git-commit-vandalism/t/t1430-bad-ref-name.sh
Junio C Hamano a625b092cc branch: correctly reject refs/heads/{-dash,HEAD} 
strbuf_check_branch_ref() is the central place where many codepaths
see if a proposed name is suitable for the name of a branch.  It was
designed to allow us to get stricter than the check_refname_format()
check used for refnames in general, and we already use it to reject
a branch whose name begins with a '-'.  The function gets a strbuf
and a string "name", and returns non-zero if the name is not
appropriate as the name for a branch.  When the name is good, it
places the full refname for the branch with the proposed name in the
strbuf before it returns.

However, it turns out that one caller looks at what is in the strbuf
even when the function returns an error.  Make the function populate
the strbuf even when it returns an error.  That way, when "-dash" is
given as name, "refs/heads/-dash" is placed in the strbuf when
returning an error to copy_or_rename_branch(), which notices that
the user is trying to recover with "git branch -m -- -dash dash" to
rename "-dash" to "dash".

While at it, use the same mechanism to also reject "HEAD" as a
branch name.

Helped-by: Jeff King <peff@peff.net>
Helped-by: Kaartic Sivaraam <kaartic.sivaraam@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-15 11:41:53 +09:00

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#!/bin/sh
test_description='Test handling of ref names that check-ref-format rejects'
. ./test-lib.sh
test_expect_success setup '
test_commit one &&
test_commit two
'
test_expect_success 'fast-import: fail on invalid branch name ".badbranchname"' '
test_when_finished "rm -f .git/objects/pack_* .git/objects/index_*" &&
cat >input <<-INPUT_END &&
commit .badbranchname
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
corrupt
COMMIT
from refs/heads/master
INPUT_END
test_must_fail git fast-import <input
'
test_expect_success 'fast-import: fail on invalid branch name "bad[branch]name"' '
test_when_finished "rm -f .git/objects/pack_* .git/objects/index_*" &&
cat >input <<-INPUT_END &&
commit bad[branch]name
committer $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> $GIT_COMMITTER_DATE
data <<COMMIT
corrupt
COMMIT
from refs/heads/master
INPUT_END
test_must_fail git fast-import <input
'
test_expect_success 'git branch shows badly named ref as warning' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git branch >output 2>error &&
test_i18ngrep -e "ignoring ref with broken name refs/heads/broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'branch -d can delete badly named ref' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git branch -d broken...ref &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'branch -D can delete badly named ref' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git branch -D broken...ref &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'branch -D cannot delete non-ref in .git dir' '
echo precious >.git/my-private-file &&
echo precious >expect &&
test_must_fail git branch -D ../../my-private-file &&
test_cmp expect .git/my-private-file
'
test_expect_success 'branch -D cannot delete ref in .git dir' '
git rev-parse HEAD >.git/my-private-file &&
git rev-parse HEAD >expect &&
git branch foo/legit &&
test_must_fail git branch -D foo////./././../../../my-private-file &&
test_cmp expect .git/my-private-file
'
test_expect_success 'branch -D cannot delete absolute path' '
git branch -f extra &&
test_must_fail git branch -D "$(pwd)/.git/refs/heads/extra" &&
test_cmp_rev HEAD extra
'
test_expect_success 'git branch cannot create a badly named ref' '
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
test_must_fail git branch broken...ref &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'branch -m cannot rename to a bad ref name' '
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
test_might_fail git branch -D goodref &&
git branch goodref &&
test_must_fail git branch -m goodref broken...ref &&
test_cmp_rev master goodref &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_failure 'branch -m can rename from a bad ref name' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git branch -m broken...ref renamed &&
test_cmp_rev master renamed &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'push cannot create a badly named ref' '
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
test_must_fail git push "file://$(pwd)" HEAD:refs/heads/broken...ref &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_failure C_LOCALE_OUTPUT 'push --mirror can delete badly named ref' '
top=$(pwd) &&
git init src &&
git init dest &&
(
cd src &&
test_commit one
) &&
(
cd dest &&
test_commit two &&
git checkout --detach &&
cp .git/refs/heads/master .git/refs/heads/broken...ref
) &&
git -C src push --mirror "file://$top/dest" &&
git -C dest branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'rev-parse skips symref pointing to broken name' '
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git branch shadow one &&
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
printf "ref: refs/heads/broken...ref\n" >.git/refs/tags/shadow &&
test_when_finished "rm -f .git/refs/tags/shadow" &&
git rev-parse --verify one >expect &&
git rev-parse --verify shadow >actual 2>err &&
test_cmp expect actual &&
test_i18ngrep "ignoring dangling symref refs/tags/shadow" err
'
test_expect_success 'for-each-ref emits warnings for broken names' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
printf "ref: refs/heads/broken...ref\n" >.git/refs/heads/badname &&
test_when_finished "rm -f .git/refs/heads/badname" &&
printf "ref: refs/heads/master\n" >.git/refs/heads/broken...symref &&
test_when_finished "rm -f .git/refs/heads/broken...symref" &&
git for-each-ref >output 2>error &&
! grep -e "broken\.\.\.ref" output &&
! grep -e "badname" output &&
! grep -e "broken\.\.\.symref" output &&
test_i18ngrep "ignoring ref with broken name refs/heads/broken\.\.\.ref" error &&
test_i18ngrep "ignoring broken ref refs/heads/badname" error &&
test_i18ngrep "ignoring ref with broken name refs/heads/broken\.\.\.symref" error
'
test_expect_success 'update-ref -d can delete broken name' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git update-ref -d refs/heads/broken...ref >output 2>error &&
test_must_be_empty output &&
test_must_be_empty error &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'branch -d can delete broken name' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
git branch -d broken...ref >output 2>error &&
test_i18ngrep "Deleted branch broken...ref (was broken)" output &&
test_must_be_empty error &&
git branch >output 2>error &&
! grep -e "broken\.\.\.ref" error &&
! grep -e "broken\.\.\.ref" output
'
test_expect_success 'update-ref --no-deref -d can delete symref to broken name' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
printf "ref: refs/heads/broken...ref\n" >.git/refs/heads/badname &&
test_when_finished "rm -f .git/refs/heads/badname" &&
git update-ref --no-deref -d refs/heads/badname >output 2>error &&
test_path_is_missing .git/refs/heads/badname &&
test_must_be_empty output &&
test_must_be_empty error
'
test_expect_success 'branch -d can delete symref to broken name' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
printf "ref: refs/heads/broken...ref\n" >.git/refs/heads/badname &&
test_when_finished "rm -f .git/refs/heads/badname" &&
git branch -d badname >output 2>error &&
test_path_is_missing .git/refs/heads/badname &&
test_i18ngrep "Deleted branch badname (was refs/heads/broken\.\.\.ref)" output &&
test_must_be_empty error
'
test_expect_success 'update-ref --no-deref -d can delete dangling symref to broken name' '
printf "ref: refs/heads/broken...ref\n" >.git/refs/heads/badname &&
test_when_finished "rm -f .git/refs/heads/badname" &&
git update-ref --no-deref -d refs/heads/badname >output 2>error &&
test_path_is_missing .git/refs/heads/badname &&
test_must_be_empty output &&
test_must_be_empty error
'
test_expect_success 'branch -d can delete dangling symref to broken name' '
printf "ref: refs/heads/broken...ref\n" >.git/refs/heads/badname &&
test_when_finished "rm -f .git/refs/heads/badname" &&
git branch -d badname >output 2>error &&
test_path_is_missing .git/refs/heads/badname &&
test_i18ngrep "Deleted branch badname (was refs/heads/broken\.\.\.ref)" output &&
test_must_be_empty error
'
test_expect_success 'update-ref -d can delete broken name through symref' '
cp .git/refs/heads/master .git/refs/heads/broken...ref &&
test_when_finished "rm -f .git/refs/heads/broken...ref" &&
printf "ref: refs/heads/broken...ref\n" >.git/refs/heads/badname &&
test_when_finished "rm -f .git/refs/heads/badname" &&
git update-ref -d refs/heads/badname >output 2>error &&
test_path_is_missing .git/refs/heads/broken...ref &&
test_must_be_empty output &&
test_must_be_empty error
'
test_expect_success 'update-ref --no-deref -d can delete symref with broken name' '
printf "ref: refs/heads/master\n" >.git/refs/heads/broken...symref &&
test_when_finished "rm -f .git/refs/heads/broken...symref" &&
git update-ref --no-deref -d refs/heads/broken...symref >output 2>error &&
test_path_is_missing .git/refs/heads/broken...symref &&
test_must_be_empty output &&
test_must_be_empty error
'
test_expect_success 'branch -d can delete symref with broken name' '
printf "ref: refs/heads/master\n" >.git/refs/heads/broken...symref &&
test_when_finished "rm -f .git/refs/heads/broken...symref" &&
git branch -d broken...symref >output 2>error &&
test_path_is_missing .git/refs/heads/broken...symref &&
test_i18ngrep "Deleted branch broken...symref (was refs/heads/master)" output &&
test_must_be_empty error
'
test_expect_success 'update-ref --no-deref -d can delete dangling symref with broken name' '
printf "ref: refs/heads/idonotexist\n" >.git/refs/heads/broken...symref &&
test_when_finished "rm -f .git/refs/heads/broken...symref" &&
git update-ref --no-deref -d refs/heads/broken...symref >output 2>error &&
test_path_is_missing .git/refs/heads/broken...symref &&
test_must_be_empty output &&
test_must_be_empty error
'
test_expect_success 'branch -d can delete dangling symref with broken name' '
printf "ref: refs/heads/idonotexist\n" >.git/refs/heads/broken...symref &&
test_when_finished "rm -f .git/refs/heads/broken...symref" &&
git branch -d broken...symref >output 2>error &&
test_path_is_missing .git/refs/heads/broken...symref &&
test_i18ngrep "Deleted branch broken...symref (was refs/heads/idonotexist)" output &&
test_must_be_empty error
'
test_expect_success 'update-ref -d cannot delete non-ref in .git dir' '
echo precious >.git/my-private-file &&
echo precious >expect &&
test_must_fail git update-ref -d my-private-file >output 2>error &&
test_must_be_empty output &&
test_i18ngrep -e "refusing to update ref with bad name" error &&
test_cmp expect .git/my-private-file
'
test_expect_success 'update-ref -d cannot delete absolute path' '
git branch -f extra &&
test_must_fail git update-ref -d "$(pwd)/.git/refs/heads/extra" &&
test_cmp_rev HEAD extra
'
test_expect_success 'update-ref --stdin fails create with bad ref name' '
echo "create ~a refs/heads/master" >stdin &&
test_must_fail git update-ref --stdin <stdin 2>err &&
grep "fatal: invalid ref format: ~a" err
'
test_expect_success 'update-ref --stdin fails update with bad ref name' '
echo "update ~a refs/heads/master" >stdin &&
test_must_fail git update-ref --stdin <stdin 2>err &&
grep "fatal: invalid ref format: ~a" err
'
test_expect_success 'update-ref --stdin fails delete with bad ref name' '
echo "delete ~a refs/heads/master" >stdin &&
test_must_fail git update-ref --stdin <stdin 2>err &&
grep "fatal: invalid ref format: ~a" err
'
test_expect_success 'update-ref --stdin -z fails create with bad ref name' '
printf "%s\0" "create ~a " refs/heads/master >stdin &&
test_must_fail git update-ref -z --stdin <stdin 2>err &&
grep "fatal: invalid ref format: ~a " err
'
test_expect_success 'update-ref --stdin -z fails update with bad ref name' '
printf "%s\0" "update ~a" refs/heads/master "" >stdin &&
test_must_fail git update-ref -z --stdin <stdin 2>err &&
grep "fatal: invalid ref format: ~a" err
'
test_expect_success 'update-ref --stdin -z fails delete with bad ref name' '
printf "%s\0" "delete ~a" refs/heads/master >stdin &&
test_must_fail git update-ref -z --stdin <stdin 2>err &&
grep "fatal: invalid ref format: ~a" err
'
test_expect_success 'branch rejects HEAD as a branch name' '
test_must_fail git branch HEAD HEAD^ &&
test_must_fail git show-ref refs/heads/HEAD
'
test_expect_success 'checkout -b rejects HEAD as a branch name' '
test_must_fail git checkout -B HEAD HEAD^ &&
test_must_fail git show-ref refs/heads/HEAD
'
test_expect_success 'update-ref can operate on refs/heads/HEAD' '
git update-ref refs/heads/HEAD HEAD^ &&
git show-ref refs/heads/HEAD &&
git update-ref -d refs/heads/HEAD &&
test_must_fail git show-ref refs/heads/HEAD
'
test_expect_success 'branch -d can remove refs/heads/HEAD' '
git update-ref refs/heads/HEAD HEAD^ &&
git branch -d HEAD &&
test_must_fail git show-ref refs/heads/HEAD
'
test_expect_success 'branch -m can rename refs/heads/HEAD' '
git update-ref refs/heads/HEAD HEAD^ &&
git branch -m HEAD tail &&
test_must_fail git show-ref refs/heads/HEAD &&
git show-ref refs/heads/tail
'
test_expect_success 'branch -d can remove refs/heads/-dash' '
git update-ref refs/heads/-dash HEAD^ &&
git branch -d -- -dash &&
test_must_fail git show-ref refs/heads/-dash
'
test_expect_success 'branch -m can rename refs/heads/-dash' '
git update-ref refs/heads/-dash HEAD^ &&
git branch -m -- -dash dash &&
test_must_fail git show-ref refs/heads/-dash &&
git show-ref refs/heads/dash
'
test_done
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