[PATCH v4] diff: handle --no-abbrev in no-index case
- From
- Jack Bates <bk874k@nottheoilrig.com>
- Date
- Dec 6, 2016, 16:56 UTC
- Message-ID
- <20161206165614.22921-1-jack@nottheoilrig.com>
- In-Reply-To
- <20161206010134.21856-1-jack@nottheoilrig.com>
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 <jack@nottheoilrig.com> --- diff.c | 6 +++++- t/t4013-diff-various.sh | 7 +++++++ t/t4013/diff.diff_--no-index_--raw_--abbrev=4_dir2_dir | 3 +++ t/t4013/diff.diff_--no-index_--raw_--no-abbrev_dir2_dir | 3 +++ t/t4013/diff.diff_--no-index_--raw_dir2_dir | 3 +++ t/t4013/diff.diff_--raw_--abbrev=4_initial | 6 ++++++ t/t4013/diff.diff_--raw_--no-abbrev_initial | 6 ++++++ t/t4013/diff.diff_--raw_initial | 6 ++++++ 8 files changed, 39 insertions(+), 1 deletion(-) create mode 100644 t/t4013/diff.diff_--no-index_--raw_--abbrev=4_dir2_dir create mode 100644 t/t4013/diff.diff_--no-index_--raw_--no-abbrev_dir2_dir create mode 100644 t/t4013/diff.diff_--no-index_--raw_dir2_dir create mode 100644 t/t4013/diff.diff_--raw_--abbrev=4_initial create mode 100644 t/t4013/diff.diff_--raw_--no-abbrev_initial create mode 100644 t/t4013/diff.diff_--raw_initial
diff --git a/diff.c b/diff.c index ec87283..84dba60 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)) { diff --git a/t/t4013-diff-various.sh b/t/t4013-diff-various.sh index 566817e..d09acfe 100755 --- a/t/t4013-diff-various.sh +++ b/t/t4013-diff-various.sh @@ -311,6 +311,13 @@ diff --line-prefix=abc master master^ side diff --dirstat master~1 master~2 diff --dirstat initial rearrange diff --dirstat-by-file initial rearrange +# No-index --abbrev and --no-abbrev +diff --raw initial +diff --raw --abbrev=4 initial +diff --raw --no-abbrev initial +diff --no-index --raw dir2 dir +diff --no-index --raw --abbrev=4 dir2 dir +diff --no-index --raw --no-abbrev dir2 dir EOF test_expect_success 'log -S requires an argument' ' diff --git a/t/t4013/diff.diff_--no-index_--raw_--abbrev=4_dir2_dir b/t/t4013/diff.diff_--no-index_--raw_--abbrev=4_dir2_dir new file mode 100644 index 0000000..a71b38a --- /dev/null +++ b/t/t4013/diff.diff_--no-index_--raw_--abbrev=4_dir2_dir @@ -0,0 +1,3 @@ +$ git diff --no-index --raw --abbrev=4 dir2 dir +:000000 100644 0000... 0000... A dir/sub +$ diff --git a/t/t4013/diff.diff_--no-index_--raw_--no-abbrev_dir2_dir b/t/t4013/diff.diff_--no-index_--raw_--no-abbrev_dir2_dir new file mode 100644 index 0000000..e0f0097 --- /dev/null +++ b/t/t4013/diff.diff_--no-index_--raw_--no-abbrev_dir2_dir @@ -0,0 +1,3 @@ +$ git diff --no-index --raw --no-abbrev dir2 dir +:000000 100644 0000000000000000000000000000000000000000 0000000000000000000000000000000000000000 A dir/sub +$ diff --git a/t/t4013/diff.diff_--no-index_--raw_dir2_dir b/t/t4013/diff.diff_--no-index_--raw_dir2_dir new file mode 100644 index 0000000..3cb4ee7 --- /dev/null +++ b/t/t4013/diff.diff_--no-index_--raw_dir2_dir @@ -0,0 +1,3 @@ +$ git diff --no-index --raw dir2 dir +:000000 100644 0000000... 0000000... A dir/sub +$ diff --git a/t/t4013/diff.diff_--raw_--abbrev=4_initial b/t/t4013/diff.diff_--raw_--abbrev=4_initial new file mode 100644 index 0000000..c3641db --- /dev/null +++ b/t/t4013/diff.diff_--raw_--abbrev=4_initial @@ -0,0 +1,6 @@ +$ git diff --raw --abbrev=4 initial +:100644 100644 35d2... 9929... M dir/sub +:100644 100644 01e7... 10a8... M file0 +:000000 100644 0000... b1e6... A file1 +:100644 000000 01e7... 0000... D file2 +$ diff --git a/t/t4013/diff.diff_--raw_--no-abbrev_initial b/t/t4013/diff.diff_--raw_--no-abbrev_initial new file mode 100644 index 0000000..c87a125 --- /dev/null +++ b/t/t4013/diff.diff_--raw_--no-abbrev_initial @@ -0,0 +1,6 @@ +$ git diff --raw --no-abbrev initial +:100644 100644 35d242ba79ae89ac695e26b3d4c27a8e6f028f9e 992913c5aa0a5476d10c49ed0f21fc0c6d1aedf3 M dir/sub +:100644 100644 01e79c32a8c99c557f0757da7cb6d65b3414466d 10a8a9f3657f91a156b9f0184ed79a20adef9f7f M file0 +:000000 100644 0000000000000000000000000000000000000000 b1e67221afe8461efd244b487afca22d46b95eb8 A file1 +:100644 000000 01e79c32a8c99c557f0757da7cb6d65b3414466d 0000000000000000000000000000000000000000 D file2 +$ diff --git a/t/t4013/diff.diff_--raw_initial b/t/t4013/diff.diff_--raw_initial new file mode 100644 index 0000000..a3e9780 --- /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 +$
-- 2.10.2