git/t/t7500-commit.sh
Elijah Newren 3e73cc62c0 commit: fix erroneous BUG, 'multiple renames on the same target? how?'
builtin/commit.c:prepare_to_commit() can call run_status() twice if
using the editor, including status, and the user attempts to record a
non-merge empty commit without explicit --allow-empty.  If there is also
a rename involved as well (due to using 'git add -N'), then a BUG in
wt-status.c is triggered:

  BUG: wt-status.c:476: multiple renames on the same target? how?

The reason we hit this bug is that both run_status() calls use the same
struct wt_status * (named s), and s->change is not freed between runs.
Changes are inserted into s with string_list_insert, which usually means
that the second run just recomputes all the same results and overwrites
what was computed the first time.  However, ever since commit
176ea74793 ("wt-status.c: handle worktree renames", 2017-12-27),
wt-status started checking for renames and copies but also added a
preventative check that d->rename_status wasn't already set and output a
BUG message if it was.  The problem isn't that there are multiple rename
targets to a single path as the error implies, the problem is that 's'
is not freed/cleared between the two run_status() calls.

Ever since commit dc6b1d92ca ("wt-status: use settings from
git_diff_ui_config", 2018-05-04), which stopped hardcoding
DIFF_DETECT_RENAME and allowed users to ask for copy detection, this bug
has also been triggerable with a copy instead of a rename.

Fix the bug by clearing s->change.  A better change might be to clean up
all of s between the two run_status() calls.  A good first step towards
such a goal might be writing a function to free the necessary fields in
the wt_status * struct; a cursory glance at the code suggests all of its
allocated data is probably leaked.  However, doing all that cleanup is a
bigger task for someone else interested to tackle; just fix the bug for
now.

Reported-by: Andrea Stacchiotti <andreastacchiotti@gmail.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-09-27 15:22:34 -07:00

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#!/bin/sh
#
# Copyright (c) 2007 Steven Grimm
#
test_description='git commit
Tests for selected commit options.'
. ./test-lib.sh
commit_msg_is () {
expect=commit_msg_is.expect
actual=commit_msg_is.actual
printf "%s" "$(git log --pretty=format:%s%b -1)" >"$actual" &&
printf "%s" "$1" >"$expect" &&
test_i18ncmp "$expect" "$actual"
}
# A sanity check to see if commit is working at all.
test_expect_success 'a basic commit in an empty tree should succeed' '
echo content > foo &&
git add foo &&
git commit -m "initial commit"
'
test_expect_success 'nonexistent template file should return error' '
echo changes >> foo &&
git add foo &&
(
GIT_EDITOR="echo hello >\"\$1\"" &&
export GIT_EDITOR &&
test_must_fail git commit --template "$PWD"/notexist
)
'
test_expect_success 'nonexistent template file in config should return error' '
test_config commit.template "$PWD"/notexist &&
(
GIT_EDITOR="echo hello >\"\$1\"" &&
export GIT_EDITOR &&
test_must_fail git commit
)
'
# From now on we'll use a template file that exists.
TEMPLATE="$PWD"/template
test_expect_success 'unedited template should not commit' '
echo "template line" > "$TEMPLATE" &&
test_must_fail git commit --template "$TEMPLATE"
'
test_expect_success 'unedited template with comments should not commit' '
echo "# comment in template" >> "$TEMPLATE" &&
test_must_fail git commit --template "$TEMPLATE"
'
test_expect_success 'a Signed-off-by line by itself should not commit' '
(
test_set_editor "$TEST_DIRECTORY"/t7500/add-signed-off &&
test_must_fail git commit --template "$TEMPLATE"
)
'
test_expect_success 'adding comments to a template should not commit' '
(
test_set_editor "$TEST_DIRECTORY"/t7500/add-comments &&
test_must_fail git commit --template "$TEMPLATE"
)
'
test_expect_success 'adding real content to a template should commit' '
(
test_set_editor "$TEST_DIRECTORY"/t7500/add-content &&
git commit --template "$TEMPLATE"
) &&
commit_msg_is "template linecommit message"
'
test_expect_success '-t option should be short for --template' '
echo "short template" > "$TEMPLATE" &&
echo "new content" >> foo &&
git add foo &&
(
test_set_editor "$TEST_DIRECTORY"/t7500/add-content &&
git commit -t "$TEMPLATE"
) &&
commit_msg_is "short templatecommit message"
'
test_expect_success 'config-specified template should commit' '
echo "new template" > "$TEMPLATE" &&
test_config commit.template "$TEMPLATE" &&
echo "more content" >> foo &&
git add foo &&
(
test_set_editor "$TEST_DIRECTORY"/t7500/add-content &&
git commit
) &&
commit_msg_is "new templatecommit message"
'
test_expect_success 'explicit commit message should override template' '
echo "still more content" >> foo &&
git add foo &&
GIT_EDITOR="$TEST_DIRECTORY"/t7500/add-content git commit --template "$TEMPLATE" \
-m "command line msg" &&
commit_msg_is "command line msg"
'
test_expect_success 'commit message from file should override template' '
echo "content galore" >> foo &&
git add foo &&
echo "standard input msg" |
(
test_set_editor "$TEST_DIRECTORY"/t7500/add-content &&
git commit --template "$TEMPLATE" --file -
) &&
commit_msg_is "standard input msg"
'
cat >"$TEMPLATE" <<\EOF
### template
EOF
test_expect_success 'commit message from template with whitespace issue' '
echo "content galore" >>foo &&
git add foo &&
GIT_EDITOR=\""$TEST_DIRECTORY"\"/t7500/add-whitespaced-content \
git commit --template "$TEMPLATE" &&
commit_msg_is "commit message"
'
test_expect_success 'using alternate GIT_INDEX_FILE (1)' '
cp .git/index saved-index &&
(
echo some new content >file &&
GIT_INDEX_FILE=.git/another_index &&
export GIT_INDEX_FILE &&
git add file &&
git commit -m "commit using another index" &&
git diff-index --exit-code HEAD &&
git diff-files --exit-code
) &&
cmp .git/index saved-index >/dev/null
'
test_expect_success 'using alternate GIT_INDEX_FILE (2)' '
cp .git/index saved-index &&
(
rm -f .git/no-such-index &&
GIT_INDEX_FILE=.git/no-such-index &&
export GIT_INDEX_FILE &&
git commit -m "commit using nonexistent index" &&
test -z "$(git ls-files)" &&
test -z "$(git ls-tree HEAD)"
) &&
cmp .git/index saved-index >/dev/null
'
cat > expect << EOF
zort
Signed-off-by: C O Mitter <committer@example.com>
EOF
test_expect_success '--signoff' '
echo "yet another content *narf*" >> foo &&
echo "zort" | git commit -s -F - foo &&
git cat-file commit HEAD | sed "1,/^\$/d" > output &&
test_cmp expect output
'
test_expect_success 'commit message from file (1)' '
mkdir subdir &&
echo "Log in top directory" >log &&
echo "Log in sub directory" >subdir/log &&
(
cd subdir &&
git commit --allow-empty -F log
) &&
commit_msg_is "Log in sub directory"
'
test_expect_success 'commit message from file (2)' '
rm -f log &&
echo "Log in sub directory" >subdir/log &&
(
cd subdir &&
git commit --allow-empty -F log
) &&
commit_msg_is "Log in sub directory"
'
test_expect_success 'commit message from stdin' '
(
cd subdir &&
echo "Log with foo word" | git commit --allow-empty -F -
) &&
commit_msg_is "Log with foo word"
'
test_expect_success 'commit -F overrides -t' '
(
cd subdir &&
echo "-F log" > f.log &&
echo "-t template" > t.template &&
git commit --allow-empty -F f.log -t t.template
) &&
commit_msg_is "-F log"
'
test_expect_success 'Commit without message is allowed with --allow-empty-message' '
echo "more content" >>foo &&
git add foo &&
>empty &&
git commit --allow-empty-message <empty &&
commit_msg_is "" &&
git tag empty-message-commit
'
test_expect_success 'Commit without message is no-no without --allow-empty-message' '
echo "more content" >>foo &&
git add foo &&
>empty &&
test_must_fail git commit <empty
'
test_expect_success 'Commit a message with --allow-empty-message' '
echo "even more content" >>foo &&
git add foo &&
git commit --allow-empty-message -m"hello there" &&
commit_msg_is "hello there"
'
test_expect_success 'commit -C empty respects --allow-empty-message' '
echo more >>foo &&
git add foo &&
test_must_fail git commit -C empty-message-commit &&
git commit -C empty-message-commit --allow-empty-message &&
commit_msg_is ""
'
commit_for_rebase_autosquash_setup () {
echo "first content line" >>foo &&
git add foo &&
cat >log <<EOF &&
target message subject line
target message body line 1
target message body line 2
EOF
git commit -F log &&
echo "second content line" >>foo &&
git add foo &&
git commit -m "intermediate commit" &&
echo "third content line" >>foo &&
git add foo
}
test_expect_success 'commit --fixup provides correct one-line commit message' '
commit_for_rebase_autosquash_setup &&
git commit --fixup HEAD~1 &&
commit_msg_is "fixup! target message subject line"
'
test_expect_success 'commit --fixup -m"something" -m"extra"' '
commit_for_rebase_autosquash_setup &&
git commit --fixup HEAD~1 -m"something" -m"extra" &&
commit_msg_is "fixup! target message subject linesomething
extra"
'
test_expect_success 'commit --squash works with -F' '
commit_for_rebase_autosquash_setup &&
echo "log message from file" >msgfile &&
git commit --squash HEAD~1 -F msgfile &&
commit_msg_is "squash! target message subject linelog message from file"
'
test_expect_success 'commit --squash works with -m' '
commit_for_rebase_autosquash_setup &&
git commit --squash HEAD~1 -m "foo bar\nbaz" &&
commit_msg_is "squash! target message subject linefoo bar\nbaz"
'
test_expect_success 'commit --squash works with -C' '
commit_for_rebase_autosquash_setup &&
git commit --squash HEAD~1 -C HEAD &&
commit_msg_is "squash! target message subject lineintermediate commit"
'
test_expect_success 'commit --squash works with -c' '
commit_for_rebase_autosquash_setup &&
test_set_editor "$TEST_DIRECTORY"/t7500/edit-content &&
git commit --squash HEAD~1 -c HEAD &&
commit_msg_is "squash! target message subject lineedited commit"
'
test_expect_success 'commit --squash works with -C for same commit' '
commit_for_rebase_autosquash_setup &&
git commit --squash HEAD -C HEAD &&
commit_msg_is "squash! intermediate commit"
'
test_expect_success 'commit --squash works with -c for same commit' '
commit_for_rebase_autosquash_setup &&
test_set_editor "$TEST_DIRECTORY"/t7500/edit-content &&
git commit --squash HEAD -c HEAD &&
commit_msg_is "squash! edited commit"
'
test_expect_success 'commit --squash works with editor' '
commit_for_rebase_autosquash_setup &&
test_set_editor "$TEST_DIRECTORY"/t7500/add-content &&
git commit --squash HEAD~1 &&
commit_msg_is "squash! target message subject linecommit message"
'
test_expect_success 'invalid message options when using --fixup' '
echo changes >>foo &&
echo "message" >log &&
git add foo &&
test_must_fail git commit --fixup HEAD~1 --squash HEAD~2 &&
test_must_fail git commit --fixup HEAD~1 -C HEAD~2 &&
test_must_fail git commit --fixup HEAD~1 -c HEAD~2 &&
test_must_fail git commit --fixup HEAD~1 -F log
'
cat >expected-template <<EOF
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Author: A U Thor <author@example.com>
#
# On branch commit-template-check
# Changes to be committed:
# new file: commit-template-check
#
# Untracked files not listed
EOF
test_expect_success 'new line found before status message in commit template' '
git checkout -b commit-template-check &&
git reset --hard HEAD &&
touch commit-template-check &&
git add commit-template-check &&
GIT_EDITOR="cat >editor-input" git commit --untracked-files=no --allow-empty-message &&
test_i18ncmp expected-template editor-input
'
test_expect_success 'setup empty commit with unstaged rename and copy' '
test_create_repo unstaged_rename_and_copy &&
(
cd unstaged_rename_and_copy &&
echo content >orig &&
git add orig &&
test_commit orig &&
cp orig new_copy &&
mv orig new_rename &&
git add -N new_copy new_rename
)
'
test_expect_success 'check commit with unstaged rename and copy' '
(
cd unstaged_rename_and_copy &&
test_must_fail git -c diff.renames=copy commit
)
'
test_done