git-commit-vandalism/t/t4135-apply-weird-filenames.sh
Ævar Arnfjörð Bjarmason 03267e8656 commit: discard partial cache before (re-)reading it
The read_cache() in prepare_to_commit() would end up clobbering the
pointer we had for a previously populated "the_index.cache_tree" in
the very common case of "git commit" stressed by e.g. the tests being
changed here.

We'd populate "the_index.cache_tree" by calling
"update_main_cache_tree" in prepare_index(), but would not end up with
a "fully prepared" index. What constitutes an existing index is
clearly overly fuzzy, here we'll check "active_nr" (aka
"the_index.cache_nr"), but our "the_index.cache_tree" might have been
malloc()'d already.

Thus the code added in 11c8a74a64 (commit: write cache-tree data when
writing index anyway, 2011-12-06) would end up allocating the
"cache_tree", and would interact here with code added in
7168624c35 (Do not generate full commit log message if it is not
going to be used, 2007-11-28). The result was a very common memory
leak.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
2022-11-21 12:32:48 +09:00

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#!/bin/sh
test_description='git apply with weird postimage filenames'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success 'setup' '
vector=$TEST_DIRECTORY/t4135 &&
test_tick &&
git commit --allow-empty -m preimage &&
git tag preimage &&
reset_preimage() {
git checkout -f preimage^0 &&
git read-tree -u --reset HEAD &&
git update-index --refresh
}
'
try_filename() {
desc=$1
postimage=$2
prereq=${3:-}
exp1=${4:-success}
exp2=${5:-success}
exp3=${6:-success}
test_expect_$exp1 $prereq "$desc, git-style file creation patch" "
echo postimage >expected &&
reset_preimage &&
rm -f '$postimage' &&
git apply -v \"\$vector\"/'git-$desc.diff' &&
test_cmp expected '$postimage'
"
test_expect_$exp2 $prereq "$desc, traditional patch" "
echo postimage >expected &&
reset_preimage &&
echo preimage >'$postimage' &&
git apply -v \"\$vector\"/'diff-$desc.diff' &&
test_cmp expected '$postimage'
"
test_expect_$exp3 $prereq "$desc, traditional file creation patch" "
echo postimage >expected &&
reset_preimage &&
rm -f '$postimage' &&
git apply -v \"\$vector\"/'add-$desc.diff' &&
test_cmp expected '$postimage'
"
}
try_filename 'plain' 'postimage.txt'
try_filename 'with spaces' 'post image.txt'
try_filename 'with tab' 'post image.txt' FUNNYNAMES
try_filename 'with backslash' 'post\image.txt' BSLASHPSPEC
try_filename 'with quote' '"postimage".txt' FUNNYNAMES success failure success
test_expect_success 'whitespace-damaged traditional patch' '
echo postimage >expected &&
reset_preimage &&
rm -f postimage.txt &&
git apply -v "$vector/damaged.diff" &&
test_cmp expected postimage.txt
'
test_expect_success 'traditional patch with colon in timezone' '
echo postimage >expected &&
reset_preimage &&
rm -f "post image.txt" &&
git apply "$vector/funny-tz.diff" &&
test_cmp expected "post image.txt"
'
test_expect_success 'traditional, whitespace-damaged, colon in timezone' '
echo postimage >expected &&
reset_preimage &&
rm -f "post image.txt" &&
git apply "$vector/damaged-tz.diff" &&
test_cmp expected "post image.txt"
'
cat >diff-from-svn <<\EOF
Index: Makefile
===================================================================
diff --git a/branches/Makefile
deleted file mode 100644
--- a/branches/Makefile (revision 13)
+++ /dev/null (nonexistent)
@@ +1 0,0 @@
-
EOF
test_expect_success 'apply handles a diff generated by Subversion' '
>Makefile &&
git apply -p2 diff-from-svn &&
test_path_is_missing Makefile
'
test_done