[PATCH v2 2/2] blame: allow blame --reverse --first-parent when it makes sense
- From
Max Kirillov <max@max630.net>
- Date
- Oct 22, 2015, 03:51 UTC
- Message-ID
- <1445485872-21453-3-git-send-email-max@max630.net>
- In-Reply-To
- <1445485872-21453-1-git-send-email-max@max630.net>
Do not die immediately when the two flags are specified. Instead check that the specified range is along first-parent chain. Exploit how prepare_revision_walk() handles first_parent_only flag: the commits outside of first-parent chain are either unknown (and do not have any children recorded) or appear as non-first parent of a commit along the first-parent chain.
Since the check seems fragile, add test which verifies that blame dies in both cases.
Signed-off-by: Max Kirillov <max@max630.net> --- builtin/blame.c | 11 +++++++++-- t/t8009-blame-reverse.sh | 7 ++++++- 2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/builtin/blame.c b/builtin/blame.c index 295ce92..27de544 100644 --- a/builtin/blame.c +++ b/builtin/blame.c @@ -2692,8 +2692,6 @@ parse_done: } else if (contents_from) die("--contents and --children do not blend well."); - else if (revs.first_parent_only) - die("combining --first-parent and --reverse is not supported"); else { final_commit_name = prepare_initial(&sb); sb.commits.compare = compare_commits_by_reverse_commit_date; @@ -2721,6 +2719,15 @@ parse_done: if (prepare_revision_walk(&revs)) die(_("revision walk setup failed")); + if (reverse && revs.first_parent_only) { + struct commit_list *final_children = lookup_decoration(&revs.children, + &sb.final->object); + if (!final_children || + hashcmp(final_children->item->parents->item->object.sha1, + sb.final->object.sha1)) + die("--reverse --first-parent together require range along first-parent chain"); + } + if (is_null_sha1(sb.final->object.sha1)) { o = sb.final->util; sb.final_buf = xmemdupz(o->file.ptr, o->file.size); diff --git a/t/t8009-blame-reverse.sh b/t/t8009-blame-reverse.sh index 9f40613..042863b 100755 --- a/t/t8009-blame-reverse.sh +++ b/t/t8009-blame-reverse.sh @@ -24,11 +24,16 @@ test_expect_failure 'blame --reverse finds B1, not C1' ' test_cmp expect actual ' -test_expect_failure 'blame --reverse --first-parent finds A1' ' +test_expect_success 'blame --reverse --first-parent finds A1' ' git blame --porcelain --reverse --first-parent A0..A3 -- file.t >actual_full && head -1 <actual_full | sed -e "sX .*XX" >actual && git rev-parse A1 >expect && test_cmp expect actual ' +test_expect_success 'blame --reverse --first-parse dies if no first parent chain' ' + test_must_fail git blame --porcelain --reverse --first-parent B1..A3 -- file.t && + test_must_fail git blame --porcelain --reverse --first-parent B2..A3 -- file.t + ' + test_done
-- 2.3.4.2801.g3d0809b