From 43d1948b7b84abc744227259dd1a3e8dfbb60358 Mon Sep 17 00:00:00 2001 From: Jack Bates Date: Tue, 6 Dec 2016 09:56:14 -0700 Subject: diff: handle --no-abbrev in no-index case There are two different places where the --no-abbrev option is parsed, and two different places where SHA-1s are abbreviated. We normally parse --no-abbrev with setup_revisions(), but in the no-index case, "git diff" calls diff_opt_parse() directly, and diff_opt_parse() didn't handle --no-abbrev until now. (It did handle --abbrev, however.) We normally abbreviate SHA-1s with find_unique_abbrev(), but commit 4f03666 ("diff: handle sha1 abbreviations outside of repository, 2016-10-20) recently introduced a special case when you run "git diff" outside of a repository. setup_revisions() does also call diff_opt_parse(), but not for --abbrev or --no-abbrev, which it handles itself. setup_revisions() sets rev_info->abbrev, and later copies that to diff_options->abbrev. It handles --no-abbrev by setting abbrev to zero. (This change doesn't touch that.) Setting abbrev to zero was broken in the outside-of-a-repository special case, which until now resulted in a truly zero-length SHA-1, rather than taking zero to mean do not abbreviate. The only way to trigger this bug, however, was by running "git diff --raw" without either the --abbrev or --no-abbrev options, because 1) without --raw it doesn't respect abbrev (which is bizarre, but has been that way forever), 2) we silently clamp --abbrev=0 to MINIMUM_ABBREV, and 3) --no-abbrev wasn't handled until now. The outside-of-a-repository case is one of three no-index cases. The other two are when one of the files you're comparing is outside of the repository you're in, and the --no-index option. Signed-off-by: Jack Bates Signed-off-by: Junio C Hamano --- t/t4013/diff.diff_--raw_initial | 6 ++++++ 1 file changed, 6 insertions(+) create mode 100644 t/t4013/diff.diff_--raw_initial (limited to 't/t4013/diff.diff_--raw_initial') diff --git a/t/t4013/diff.diff_--raw_initial b/t/t4013/diff.diff_--raw_initial new file mode 100644 index 0000000000..a3e978040d --- /dev/null +++ b/t/t4013/diff.diff_--raw_initial @@ -0,0 +1,6 @@ +$ git diff --raw initial +:100644 100644 35d242b... 992913c... M dir/sub +:100644 100644 01e79c3... 10a8a9f... M file0 +:000000 100644 0000000... b1e6722... A file1 +:100644 000000 01e79c3... 0000000... D file2 +$ -- cgit 1.2.3-korg