git/t/t8003-blame-corner-cases.sh
Patrick Steinhardt 3332f35577 builtin/blame: fix leaking prefixed paths
In `cmd_blame()` we compute prefixed paths by calling `add_prefix()`,
which itself calls `prefix_path()`. While `prefix_path()` returns an
allocated string, `add_prefix()` pretends to return a constant string.
Consequently, this path never gets freed.

Fix the return type to be `char *` and free the path to plug the memory
leak.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-06-11 13:15:08 -07:00

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#!/bin/sh
test_description='git blame corner cases'
GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
pick_fc='s/^[0-9a-f^]* *\([^ ]*\) *(\([^ ]*\) .*/\1-\2/'
test_expect_success setup '
echo A A A A A >one &&
echo B B B B B >two &&
echo C C C C C >tres &&
echo ABC >mouse &&
test_write_lines 1 2 3 4 5 6 7 8 9 >nine_lines &&
test_write_lines 1 2 3 4 5 6 7 8 9 a >ten_lines &&
git add one two tres mouse nine_lines ten_lines &&
test_tick &&
GIT_AUTHOR_NAME=Initial git commit -m Initial &&
cat one >uno &&
mv two dos &&
cat one >>tres &&
echo DEF >>mouse &&
git add uno dos tres mouse &&
test_tick &&
GIT_AUTHOR_NAME=Second git commit -a -m Second &&
echo GHIJK >>mouse &&
git add mouse &&
test_tick &&
GIT_AUTHOR_NAME=Third git commit -m Third &&
cat mouse >cow &&
git add cow &&
test_tick &&
GIT_AUTHOR_NAME=Fourth git commit -m Fourth &&
cat >cow <<-\EOF &&
ABC
DEF
XXXX
GHIJK
EOF
git add cow &&
test_tick &&
GIT_AUTHOR_NAME=Fifth git commit -m Fifth
'
test_expect_success 'straight copy without -C' '
git blame uno | grep Second
'
test_expect_success 'straight move without -C' '
git blame dos | grep Initial
'
test_expect_success 'straight copy with -C' '
git blame -C1 uno | grep Second
'
test_expect_success 'straight move with -C' '
git blame -C1 dos | grep Initial
'
test_expect_success 'straight copy with -C -C' '
git blame -C -C1 uno | grep Initial
'
test_expect_success 'straight move with -C -C' '
git blame -C -C1 dos | grep Initial
'
test_expect_success 'append without -C' '
git blame -L2 tres | grep Second
'
test_expect_success 'append with -C' '
git blame -L2 -C1 tres | grep Second
'
test_expect_success 'append with -C -C' '
git blame -L2 -C -C1 tres | grep Second
'
test_expect_success 'append with -C -C -C' '
git blame -L2 -C -C -C1 tres | grep Initial
'
test_expect_success 'blame wholesale copy' '
git blame -f -C -C1 HEAD^ -- cow | sed -e "$pick_fc" >current &&
cat >expected <<-\EOF &&
mouse-Initial
mouse-Second
mouse-Third
EOF
test_cmp expected current
'
test_expect_success 'blame wholesale copy and more' '
git blame -f -C -C1 HEAD -- cow | sed -e "$pick_fc" >current &&
cat >expected <<-\EOF &&
mouse-Initial
mouse-Second
cow-Fifth
mouse-Third
EOF
test_cmp expected current
'
test_expect_success 'blame wholesale copy and more in the index' '
cat >horse <<-\EOF &&
ABC
DEF
XXXX
YYYY
GHIJK
EOF
git add horse &&
test_when_finished "git rm -f horse" &&
git blame -f -C -C1 -- horse | sed -e "$pick_fc" >current &&
cat >expected <<-\EOF &&
mouse-Initial
mouse-Second
cow-Fifth
horse-Not
mouse-Third
EOF
test_cmp expected current
'
test_expect_success 'blame during cherry-pick with file rename conflict' '
test_when_finished "git reset --hard && git checkout main" &&
git checkout HEAD~3 &&
echo MOUSE >> mouse &&
git mv mouse rodent &&
git add rodent &&
GIT_AUTHOR_NAME=Rodent git commit -m "rodent" &&
git checkout --detach main &&
(git cherry-pick HEAD@{1} || test $? -eq 1) &&
git show HEAD@{1}:rodent > rodent &&
git add rodent &&
git blame -f -C -C1 rodent | sed -e "$pick_fc" >current &&
cat >expected <<-\EOF &&
mouse-Initial
mouse-Second
rodent-Not
EOF
test_cmp expected current
'
test_expect_success 'blame path that used to be a directory' '
mkdir path &&
echo A A A A A >path/file &&
echo B B B B B >path/elif &&
git add path &&
test_tick &&
git commit -m "path was a directory" &&
rm -fr path &&
echo A A A A A >path &&
git add path &&
test_tick &&
git commit -m "path is a regular file" &&
git blame HEAD^.. -- path
'
test_expect_success 'blame to a commit with no author name' '
TREE=$(git rev-parse HEAD:) &&
cat >badcommit <<EOF &&
tree $TREE
author <noname> 1234567890 +0000
committer David Reiss <dreiss@facebook.com> 1234567890 +0000
some message
EOF
COMMIT=$(git hash-object --literally -t commit -w badcommit) &&
git --no-pager blame $COMMIT -- uno >/dev/null
'
test_expect_success 'blame -L with invalid start' '
test_must_fail git blame -L5 tres 2>errors &&
test_grep "has only 2 lines" errors
'
test_expect_success 'blame -L with invalid end' '
git blame -L1,5 tres >out &&
test_line_count = 2 out
'
test_expect_success 'blame parses <end> part of -L' '
git blame -L1,1 tres >out &&
test_line_count = 1 out
'
test_expect_success 'blame -Ln,-(n+1)' '
git blame -L3,-4 nine_lines >out &&
test_line_count = 3 out
'
test_expect_success 'indent of line numbers, nine lines' '
git blame nine_lines >actual &&
test $(grep -c " " actual) = 0
'
test_expect_success 'indent of line numbers, ten lines' '
git blame ten_lines >actual &&
test $(grep -c " " actual) = 9
'
test_expect_success 'setup file with CRLF newlines' '
git config core.autocrlf false &&
printf "testcase\n" >crlffile &&
git add crlffile &&
git commit -m testcase &&
printf "testcase\r\n" >crlffile
'
test_expect_success 'blame file with CRLF core.autocrlf true' '
git config core.autocrlf true &&
git blame crlffile >actual &&
grep "A U Thor" actual
'
test_expect_success 'blame file with CRLF attributes text' '
git config core.autocrlf false &&
echo "crlffile text" >.gitattributes &&
git blame crlffile >actual &&
grep "A U Thor" actual
'
test_expect_success 'blame file with CRLF core.autocrlf=true' '
git config core.autocrlf false &&
printf "testcase\r\n" >crlfinrepo &&
>.gitattributes &&
git add crlfinrepo &&
git commit -m "add crlfinrepo" &&
git config core.autocrlf true &&
mv crlfinrepo tmp &&
git checkout crlfinrepo &&
rm tmp &&
git blame crlfinrepo >actual &&
grep "A U Thor" actual
'
test_expect_success 'setup coalesce tests' '
cat >giraffe <<-\EOF &&
ABC
DEF
EOF
git add giraffe &&
git commit -m "original file" &&
orig=$(git rev-parse HEAD) &&
cat >giraffe <<-\EOF &&
ABC
SPLIT
DEF
EOF
git add giraffe &&
git commit -m "interior SPLIT line" &&
split=$(git rev-parse HEAD) &&
cat >giraffe <<-\EOF &&
ABC
DEF
EOF
git add giraffe &&
git commit -m "same contents as original" &&
final=$(git rev-parse HEAD)
'
test_expect_success 'blame coalesce' '
cat >expect <<-EOF &&
$orig 1 1 2
$orig 2 2
EOF
git blame --porcelain $final giraffe >actual.raw &&
grep "^$orig" actual.raw >actual &&
test_cmp expect actual
'
test_expect_success 'blame does not coalesce non-adjacent result lines' '
cat >expect <<-EOF &&
$orig 1) ABC
$orig 3) DEF
EOF
git blame --no-abbrev -s -L1,1 -L3,3 $split giraffe >actual &&
test_cmp expect actual
'
test_done