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| author | Junio C Hamano <gitster@pobox.com> | 2017-03-01 18:04:44 +0100 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-03-02 10:48:06 -0800 |
| commit | 12426e114b252d130d83c3f098c4ceae3cf217e3 (patch) | |
| tree | b87b7d45487b8c1bea1d33f0336b214d7f3de78c | |
| parent | 0b65a8dbdb38962e700ee16776a3042beb489060 (diff) | |
| download | git-jc/diff-populate-filespec-size-only-fix.tar.gz | |
diff: do not short-cut CHECK_SIZE_ONLY check in diff_populate_filespec()jc/diff-populate-filespec-size-only-fix
Callers of diff_populate_filespec() can choose to ask only for the
size of the blob without grabbing the blob data, and the function,
after running lstat() when the filespec points at a working tree
file, returns by copying the value in size field of the stat
structure into the size field of the filespec when this is the case.
However, this short-cut cannot be taken if the contents from the
path needs to go through convert_to_git(), whose resulting real blob
data may be different from what is in the working tree file.
As "git diff --quiet" compares the .size fields of filespec
structures to skip content comparison, this bug manifests as a
false "there are differences" for a file that needs eol conversion,
for example.
Reported-by: Mike Crowe <mac@mcrowe.com>
Helped-by: Torsten Bögershausen <tboegi@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | diff.c | 19 | ||||
| -rwxr-xr-x | t/t4035-diff-quiet.sh | 9 |
2 files changed, 27 insertions, 1 deletions
@@ -2783,8 +2783,25 @@ int diff_populate_filespec(struct diff_filespec *s, unsigned int flags) s->should_free = 1; return 0; } - if (size_only) + + /* + * Even if the caller would be happy with getting + * only the size, we cannot return early at this + * point if the path requires us to run the content + * conversion. + */ + if (size_only && !would_convert_to_git(s->path)) return 0; + + /* + * Note: this check uses xsize_t(st.st_size) that may + * not be the true size of the blob after it goes + * through convert_to_git(). This may not strictly be + * correct, but the whole point of big_file_threshold + * and is_binary check being that we want to avoid + * opening the file and inspecting the contents, this + * is probably fine. + */ if ((flags & CHECK_BINARY) && s->size > big_file_threshold && s->is_binary == -1) { s->is_binary = 1; diff --git a/t/t4035-diff-quiet.sh b/t/t4035-diff-quiet.sh index 461f4bb583..2f1737fcef 100755 --- a/t/t4035-diff-quiet.sh +++ b/t/t4035-diff-quiet.sh @@ -152,4 +152,13 @@ test_expect_success 'git diff --quiet ignores stat-change only entries' ' test_expect_code 1 git diff --quiet ' +test_expect_success 'git diff --quiet on a path that need conversion' ' + echo "crlf.txt text=auto" >.gitattributes && + printf "Hello\r\nWorld\r\n" >crlf.txt && + git add .gitattributes crlf.txt && + + printf "Hello\r\nWorld\n" >crlf.txt && + git diff --quiet crlf.txt +' + test_done |