A git patch that does not change the executable bit still records the mode on its "index" line. "git apply" used to interpret this mode exactly the same way as it interprets the mode recorded on "new mode" line. As the wish by the patch submitter to set the mode to the one recorded on the line. The reason the mode does not agree between the submitter and the receiver in the first place is because there is _another_ commit that only appears on one side but not the other since their histories diverged, and that commit changes the mode. The patch has "index" line but not "new mode" line because its change is about updating the contents without affecting the mode. The application of such a patch is an explicit wish by the submitter to only cherry-pick the commit that updates the contents without cherry-picking the commit that modifies the mode. Viewed this way, the current behaviour is problematic, even though the command does warn when the mode of the path being patched does not match this mode, and a careful user could detect this inconsistencies between the patch submitter and the patch receiver. This changes the semantics of the mode recorded on the "index" line; instead of interpreting it as the submitter's wish to set the mode to the recorded value, it merely informs what the mode submitter happened to have, and the presense of the "index" line is taken as submitter's wish to keep whatever the mode is on the receiving end. This is based on the patch originally done by Alexander Potashev with a minor fix; the tests are mine. Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx> --- Alexander Potashev <aspotashev@xxxxxxxxx> writes: > Prevent 'git apply' from changing permissions without > 'old mode'/'new mode' lines in patch. > (WARNING: this changes the behaviour of 'git apply') > ... > Test cases are probably wanted, but I don't really know how to do them > and I'll only give a chain of commands to reproduce the issue: So here is what I sent earlier but with test cases. I suspect your version does not pass the latter half of the test suite, because it stomps on the explicitly recorded mode changes in the patch. builtin-apply.c | 4 ++- t/t4129-apply-samemode.sh | 62 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+), 1 deletions(-) diff --git c/builtin-apply.c w/builtin-apply.c index 07244b0..a8f75ed 100644 --- c/builtin-apply.c +++ w/builtin-apply.c @@ -630,7 +630,7 @@ static int gitdiff_index(const char *line, struct patch *patch) memcpy(patch->new_sha1_prefix, line, len); patch->new_sha1_prefix[len] = 0; if (*ptr == ' ') - patch->new_mode = patch->old_mode = strtoul(ptr+1, NULL, 8); + patch->old_mode = strtoul(ptr+1, NULL, 8); return 0; } @@ -2447,6 +2447,8 @@ static int check_preimage(struct patch *patch, struct cache_entry **ce, struct s if (st_mode != patch->old_mode) fprintf(stderr, "warning: %s has type %o, expected %o\n", old_name, st_mode, patch->old_mode); + if (!patch->new_mode) + patch->new_mode = st_mode; return 0; is_new: diff --git c/t/t4129-apply-samemode.sh w/t/t4129-apply-samemode.sh new file mode 100755 index 0000000..adfcbb5 --- /dev/null +++ w/t/t4129-apply-samemode.sh @@ -0,0 +1,62 @@ +#!/bin/sh + +test_description='applying patch with mode bits' + +. ./test-lib.sh + +test_expect_success setup ' + echo original >file && + git add file && + test_tick && + git commit -m initial && + git tag initial && + echo modified >file && + git diff --stat -p >patch-0.txt && + chmod +x file && + git diff --stat -p >patch-1.txt +' + +test_expect_success 'same mode (no index)' ' + git reset --hard && + chmod +x file && + git apply patch-0.txt && + test -x file +' + +test_expect_success 'same mode (with index)' ' + git reset --hard && + chmod +x file && + git add file && + git apply --index patch-0.txt && + test -x file && + git diff --exit-code +' + +test_expect_success 'same mode (index only)' ' + git reset --hard && + chmod +x file && + git add file && + git apply --cached patch-0.txt && + git ls-files -s file | grep "^100755" +' + +test_expect_success 'mode update (no index)' ' + git reset --hard && + git apply patch-1.txt && + test -x file +' + +test_expect_success 'mode update (with index)' ' + git reset --hard && + git apply --index patch-1.txt && + test -x file && + git diff --exit-code +' + +test_expect_success 'mode update (index only)' ' + git reset --hard && + git apply --cached patch-1.txt && + git ls-files -s file | grep "^100755" +' + +test_done -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
