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git/t/t0056-git-C.sh
Ævar Arnfjörð Bjarmason a52f07afcb revisions API: have release_revisions() release "mailmap"
Extend the the release_revisions() function so that it frees the
"mailmap" in the "struct rev_info".

The log family of functions now calls the clear_mailmap() function
added in fa8afd18e5a (revisions API: provide and use a
release_revisions(), 2021-09-19), allowing us to whitelist some tests
with "TEST_PASSES_SANITIZE_LEAK=true".

Unfortunately having a pointer to a mailmap in "struct rev_info"
instead of an embedded member that we "own" get a bit messy, as can be
seen in the change to builtin/commit.c.

When we free() this data we won't be able to tell apart a pointer to a
"mailmap" on the heap from one on the stack. As seen in
ea57bc0d41 (log: add --use-mailmap option, 2013-01-05) the "log"
family allocates it on the heap, but in the find_author_by_nickname()
code added in ea16794e43 (commit: search author pattern against
mailmap, 2013-08-23) we allocated it on the stack instead.

Ideally we'd simply change that member to a "struct string_list
mailmap" and never free() the "mailmap" itself, but that would be a
much larger change to the revisions API.

We have code that needs to hand an existing "mailmap" to a "struct
rev_info", while we could change all of that, let's not go there
now.

The complexity isn't in the ownership of the "mailmap" per-se, but
that various things assume a "rev_info.mailmap == NULL" means "doesn't
want mailmap", if we changed that to an init'd "struct string_list
we'd need to carefully refactor things to change those assumptions.

Let's instead always free() it, and simply declare that if you add
such a "mailmap" it must be allocated on the heap. Any modern libc
will correctly panic if we free() a stack variable, so this should be
safe going forward.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-04-13 23:56:09 -07:00

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#!/bin/sh
test_description='"-C <path>" option and its effects on other path-related options'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success '"git -C <path>" runs git from the directory <path>' '
test_create_repo dir1 &&
echo 1 >dir1/a.txt &&
msg="initial in dir1" &&
(cd dir1 && git add a.txt && git commit -m "$msg") &&
echo "$msg" >expected &&
git -C dir1 log --format=%s >actual &&
test_cmp expected actual
'
test_expect_success '"git -C <path>" with an empty <path> is a no-op' '
(
mkdir -p dir1/subdir &&
cd dir1/subdir &&
git -C "" rev-parse --show-prefix >actual &&
echo subdir/ >expect &&
test_cmp expect actual
)
'
test_expect_success 'Multiple -C options: "-C dir1 -C dir2" is equivalent to "-C dir1/dir2"' '
test_create_repo dir1/dir2 &&
echo 1 >dir1/dir2/b.txt &&
git -C dir1/dir2 add b.txt &&
msg="initial in dir1/dir2" &&
echo "$msg" >expected &&
git -C dir1/dir2 commit -m "$msg" &&
git -C dir1 -C dir2 log --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Effect on --git-dir option: "-C c --git-dir=a.git" is equivalent to "--git-dir c/a.git"' '
mkdir c &&
mkdir c/a &&
mkdir c/a.git &&
(cd c/a.git && git init --bare) &&
echo 1 >c/a/a.txt &&
git --git-dir c/a.git --work-tree=c/a add a.txt &&
git --git-dir c/a.git --work-tree=c/a commit -m "initial" &&
git --git-dir=c/a.git log -1 --format=%s >expected &&
git -C c --git-dir=a.git log -1 --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "--git-dir=a.git -C c" is equivalent to "-C c --git-dir=a.git"' '
git -C c --git-dir=a.git log -1 --format=%s >expected &&
git --git-dir=a.git -C c log -1 --format=%s >actual &&
test_cmp expected actual
'
test_expect_success 'Effect on --work-tree option: "-C c/a.git --work-tree=../a" is equivalent to "--work-tree=c/a --git-dir=c/a.git"' '
rm c/a/a.txt &&
git --git-dir=c/a.git --work-tree=c/a status >expected &&
git -C c/a.git --work-tree=../a status >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "--work-tree=../a -C c/a.git" is equivalent to "-C c/a.git --work-tree=../a"' '
git -C c/a.git --work-tree=../a status >expected &&
git --work-tree=../a -C c/a.git status >actual &&
test_cmp expected actual
'
test_expect_success 'Effect on --git-dir and --work-tree options - "-C c --git-dir=a.git --work-tree=a" is equivalent to "--git-dir=c/a.git --work-tree=c/a"' '
git --git-dir=c/a.git --work-tree=c/a status >expected &&
git -C c --git-dir=a.git --work-tree=a status >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "-C c --git-dir=a.git --work-tree=a" is equivalent to "--git-dir=a.git -C c --work-tree=a"' '
git -C c --git-dir=a.git --work-tree=a status >expected &&
git --git-dir=a.git -C c --work-tree=a status >actual &&
test_cmp expected actual
'
test_expect_success 'Order should not matter: "-C c --git-dir=a.git --work-tree=a" is equivalent to "--git-dir=a.git --work-tree=a -C c"' '
git -C c --git-dir=a.git --work-tree=a status >expected &&
git --git-dir=a.git --work-tree=a -C c status >actual &&
test_cmp expected actual
'
test_expect_success 'Relative followed by fullpath: "-C ./here -C /there" is equivalent to "-C /there"' '
echo "initial in dir1/dir2" >expected &&
git -C dir1 -C "$(pwd)/dir1/dir2" log --format=%s >actual &&
test_cmp expected actual
'
test_done