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 --- diff.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'diff.c') diff --git a/diff.c b/diff.c index ec8728362d..84dba60c40 100644 --- a/diff.c +++ b/diff.c @@ -3106,7 +3106,8 @@ static const char *diff_abbrev_oid(const struct object_id *oid, int abbrev) abbrev = FALLBACK_DEFAULT_ABBREV; if (abbrev > GIT_SHA1_HEXSZ) die("BUG: oid abbreviation out of range: %d", abbrev); - hex[abbrev] = '\0'; + if (abbrev) + hex[abbrev] = '\0'; return hex; } } @@ -3364,6 +3365,7 @@ void diff_setup(struct diff_options *options) options->file = stdout; + options->abbrev = DEFAULT_ABBREV; options->line_termination = '\n'; options->break_opt = -1; options->rename_limit = -1; @@ -4024,6 +4026,8 @@ int diff_opt_parse(struct diff_options *options, offending, optarg); return argcount; } + else if (!strcmp(arg, "--no-abbrev")) + options->abbrev = 0; else if (!strcmp(arg, "--abbrev")) options->abbrev = DEFAULT_ABBREV; else if (skip_prefix(arg, "--abbrev=", &arg)) { -- cgit v1.2.1