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Merge branch 'jk/delete-modechange-conflict'

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Merging a branch that removes a path and another that changes the
mode bits on the same path should have conflicted at the path, but
it didn't and silently favoured the removal.

* jk/delete-modechange-conflict:
  merge: detect delete/modechange conflict
  t6031: generalize for recursive and resolve strategies
  t6031: move triple-rename test to t3030
This commit is contained in:
Junio C Hamano 2015-10-30 13:06:56 -07:00
commit 203501b39f
5 changed files with 144 additions and 89 deletions
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8
git-merge-one-file.sh
View File

@ -38,6 +38,14 @@ case "${1:-.}${2:-.}${3:-.}" in
# Deleted in both or deleted in one and unchanged in the other
#
"$1.." | "$1.$1" | "$1$1.")
if { test -z "$6" && test "$5" != "$7"; } ||
{ test -z "$7" && test "$5" != "$6"; }
then
echo "ERROR: File $4 deleted on one branch but had its" >&2
echo "ERROR: permissions changed on the other." >&2
exit 1
fi
if test -n "$2"
then
echo "Removing $4"

8
merge-recursive.c
View File

@ -1530,13 +1530,17 @@ static int read_sha1_strbuf(const unsigned char *sha1, struct strbuf *dst)
}
static int blob_unchanged(const unsigned char *o_sha,
unsigned o_mode,
const unsigned char *a_sha,
unsigned a_mode,
int renormalize, const char *path)
{
struct strbuf o = STRBUF_INIT;
struct strbuf a = STRBUF_INIT;
int ret = 0; /* assume changed for safety */
if (a_mode != o_mode)
return 0;
if (sha_eq(o_sha, a_sha))
return 1;
if (!renormalize)
@ -1722,8 +1726,8 @@ static int process_entry(struct merge_options *o,
} else if (o_sha && (!a_sha || !b_sha)) {
/* Case A: Deleted in one */
if ((!a_sha && !b_sha) ||
(!b_sha && blob_unchanged(o_sha, a_sha, normalize, path)) ||
(!a_sha && blob_unchanged(o_sha, b_sha, normalize, path))) {
(!b_sha && blob_unchanged(o_sha, o_mode, a_sha, a_mode, normalize, path)) ||
(!a_sha && blob_unchanged(o_sha, o_mode, b_sha, b_mode, normalize, path))) {
/* Deleted in both or deleted in one and
* unchanged in the other */
if (a_sha)

30
t/t3030-merge-recursive.sh
View File

@ -629,5 +629,35 @@ test_expect_failure 'merge-recursive rename vs. rename/symlink' '
test_cmp expected actual
'
test_expect_success 'merging with triple rename across D/F conflict' '
git reset --hard HEAD &&
git checkout -b main &&
git rm -rf . &&
echo "just a file" >sub1 &&
mkdir -p sub2 &&
echo content1 >sub2/file1 &&
echo content2 >sub2/file2 &&
echo content3 >sub2/file3 &&
mkdir simple &&
echo base >simple/bar &&
git add -A &&
test_tick &&
git commit -m base &&
git checkout -b other &&
echo more >>simple/bar &&
test_tick &&
git commit -a -m changesimplefile &&
git checkout main &&
git rm sub1 &&
git mv sub2 sub1 &&
test_tick &&
git commit -m changefiletodir &&
test_tick &&
git merge other
'
test_done

100
t/t6031-merge-filemode.sh Executable file
View File

@ -0,0 +1,100 @@
#!/bin/sh
test_description='merge: handle file mode'
. ./test-lib.sh
test_expect_success 'set up mode change in one branch' '
: >file1 &&
git add file1 &&
git commit -m initial &&
git checkout -b a1 master &&
: >dummy &&
git add dummy &&
git commit -m a &&
git checkout -b b1 master &&
test_chmod +x file1 &&
git add file1 &&
git commit -m b1
'
do_one_mode () {
strategy=$1
us=$2
them=$3
test_expect_success "resolve single mode change ($strategy, $us)" '
git checkout -f $us &&
git merge -s $strategy $them &&
git ls-files -s file1 | grep ^100755
'
test_expect_success FILEMODE "verify executable bit on file ($strategy, $us)" '
test -x file1
'
}
do_one_mode recursive a1 b1
do_one_mode recursive b1 a1
do_one_mode resolve a1 b1
do_one_mode resolve b1 a1
test_expect_success 'set up mode change in both branches' '
git reset --hard HEAD &&
git checkout -b a2 master &&
: >file2 &&
H=$(git hash-object file2) &&
test_chmod +x file2 &&
git commit -m a2 &&
git checkout -b b2 master &&
: >file2 &&
git add file2 &&
git commit -m b2 &&
{
echo "100755 $H 2 file2"
echo "100644 $H 3 file2"
} >expect
'
do_both_modes () {
strategy=$1
test_expect_success "detect conflict on double mode change ($strategy)" '
git reset --hard &&
git checkout -f a2 &&
test_must_fail git merge -s $strategy b2 &&
git ls-files -u >actual &&
test_cmp actual expect &&
git ls-files -s file2 | grep ^100755
'
test_expect_success FILEMODE "verify executable bit on file ($strategy)" '
test -x file2
'
}
# both sides are equivalent, so no need to run both ways
do_both_modes recursive
do_both_modes resolve
test_expect_success 'set up delete/modechange scenario' '
git reset --hard &&
git checkout -b deletion master &&
git rm file1 &&
git commit -m deletion
'
do_delete_modechange () {
strategy=$1
us=$2
them=$3
test_expect_success "detect delete/modechange conflict ($strategy, $us)" '
git reset --hard &&
git checkout $us &&
test_must_fail git merge -s $strategy $them
'
}
do_delete_modechange recursive b1 deletion
do_delete_modechange recursive deletion b1
do_delete_modechange resolve b1 deletion
do_delete_modechange resolve deletion b1
test_done

87
t/t6031-merge-recursive.sh
View File

@ -1,87 +0,0 @@
#!/bin/sh
test_description='merge-recursive: handle file mode'
. ./test-lib.sh
test_expect_success 'mode change in one branch: keep changed version' '
: >file1 &&
git add file1 &&
git commit -m initial &&
git checkout -b a1 master &&
: >dummy &&
git add dummy &&
git commit -m a &&
git checkout -b b1 master &&
test_chmod +x file1 &&
git add file1 &&
git commit -m b1 &&
git checkout a1 &&
git merge-recursive master -- a1 b1 &&
git ls-files -s file1 | grep ^100755
'
test_expect_success FILEMODE 'verify executable bit on file' '
test -x file1
'
test_expect_success 'mode change in both branches: expect conflict' '
git reset --hard HEAD &&
git checkout -b a2 master &&
: >file2 &&
H=$(git hash-object file2) &&
test_chmod +x file2 &&
git commit -m a2 &&
git checkout -b b2 master &&
: >file2 &&
git add file2 &&
git commit -m b2 &&
git checkout a2 &&
(
git merge-recursive master -- a2 b2
test $? = 1
) &&
git ls-files -u >actual &&
(
echo "100755 $H 2 file2"
echo "100644 $H 3 file2"
) >expect &&
test_cmp actual expect &&
git ls-files -s file2 | grep ^100755
'
test_expect_success FILEMODE 'verify executable bit on file' '
test -x file2
'
test_expect_success 'merging with triple rename across D/F conflict' '
git reset --hard HEAD &&
git checkout -b main &&
git rm -rf . &&
echo "just a file" >sub1 &&
mkdir -p sub2 &&
echo content1 >sub2/file1 &&
echo content2 >sub2/file2 &&
echo content3 >sub2/file3 &&
mkdir simple &&
echo base >simple/bar &&
git add -A &&
test_tick &&
git commit -m base &&
git checkout -b other &&
echo more >>simple/bar &&
test_tick &&
git commit -a -m changesimplefile &&
git checkout main &&
git rm sub1 &&
git mv sub2 sub1 &&
test_tick &&
git commit -m changefiletodir &&
test_tick &&
git merge other
'
test_done