format-patch: document and test --reroll-count
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index 6d43f56..736d8bf 100644
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -18,7 +18,7 @@
[--start-number <n>] [--numbered-files]
[--in-reply-to=Message-Id] [--suffix=.<sfx>]
[--ignore-if-in-upstream]
- [--subject-prefix=Subject-Prefix]
+ [--subject-prefix=Subject-Prefix] [--reroll-count <n>]
[--to=<email>] [--cc=<email>]
[--cover-letter] [--quiet]
[<common diff options>]
@@ -166,6 +166,14 @@
allows for useful naming of a patch series, and can be
combined with the `--numbered` option.
+--reroll-count=<n>::
+ Mark the series as the <n>-th iteration of the topic. The
+ output filenames have `v<n>` pretended to them, and the
+ subject prefix ("PATCH" by default, but configurable via the
+ `--subject-prefix` option) has ` v<n>` appended to it. E.g.
+ `--reroll-count=4` may produce `v4-0001-add-makefile.patch`
+ file that has "Subject: [PATCH v4 1/20] Add makefile" in it.
+
--to=<email>::
Add a `To:` header to the email headers. This is in addition
to any configured headers, and may be used multiple times.
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 959aa26..0ff9958 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -237,6 +237,14 @@
ls patches/0001-Side-changes-1.patch patches/0002-Side-changes-2.patch patches/0003-Side-changes-3-with-n-backslash-n-in-it.patch
'
+test_expect_success 'reroll count' '
+ rm -fr patches &&
+ git format-patch -o patches --cover-letter --reroll-count 4 master..side >list &&
+ ! grep -v "^patches/v4-000[0-3]-" list &&
+ sed -n -e "/^Subject: /p" $(cat list) >subjects &&
+ ! grep -v "^Subject: \[PATCH v4 [0-3]/3\] " subjects
+'
+
check_threading () {
expect="$1" &&
shift &&
