Hi Junio
On 23/04/2024 18:52, Junio C Hamano wrote:
In the previous step, the "--rfc" option of "format-patch" learned
to take an optional string value to prepend to the subject prefix,
so that --rfc=WIP can give "[WIP PATCH]".
There may be cases in which the extra string wants to come after the
subject prefix. Extend the mechanism to allow "--rfc=-(WIP)" [*] to
signal that the extra string is to be appended instead of getting
prepended, resulting in "[PATCH (WIP)]".
In the documentation, discourage (ab)using "--rfc=-RFC" to say
"[PATCH RFC]" just to be different, when "[RFC PATCH]" is the norm.
[Footnote]
* The syntax takes inspiration from Perl's open syntax that opens
pipes "open fh, '|-', 'cmd'", where the dash signals "the other
stuff comes here".
I'm not convinced this is a good idea as I'm not sure how adding "RFC"
at the end of the subject prefix makes the world better than just having
at the start of the prefix and I find using "-" to do that quite confusing.
Best Wishes
Phillip
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
Documentation/git-format-patch.txt | 6 ++++++
builtin/log.c | 8 ++++++--
t/t4014-format-patch.sh | 9 +++++++++
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index e553810b1e..369af2c4a7 100644
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -247,6 +247,12 @@ RFC means "Request For Comments"; use this when sending
an experimental patch for discussion rather than application.
"--rfc=WIP" may also be a useful way to indicate that a patch
is not complete yet ("WIP" stands for "Work In Progress").
++
+If the convention of the receiving community for a particular extra
+string is to have it _after_ the subject prefix, the string _<rfc>_
+can be prefixed with a dash ("`-`") to signal that the the rest of
+the _<rfc>_ string should be appended to the subject prefix instead,
+e.g., `--rfc='-(WIP)'` results in "PATCH (WIP)".
-v <n>::
--reroll-count=<n>::
diff --git a/builtin/log.c b/builtin/log.c
index 97ca885b33..4750e480e6 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -2065,8 +2065,12 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
if (cover_from_description_arg)
cover_from_description_mode = parse_cover_from_description(cover_from_description_arg);
- if (rfc && rfc[0])
- strbuf_insertf(&sprefix, 0, "%s ", rfc);
+ if (rfc && rfc[0]) {
+ if (rfc[0] == '-')
+ strbuf_addf(&sprefix, " %s", rfc + 1);
+ else
+ strbuf_insertf(&sprefix, 0, "%s ", rfc);
+ }
if (reroll_count) {
strbuf_addf(&sprefix, " v%s", reroll_count);
diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 645c4189f9..fcbde15b16 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -1394,6 +1394,15 @@ test_expect_success '--rfc=WIP and --rfc=' '
test_cmp expect-raw actual
'
+test_expect_success '--rfc=-(WIP) appends' '
+ cat >expect <<-\EOF &&
+ Subject: [PATCH (WIP) 1/1] header with . in it
+ EOF
+ git format-patch -n -1 --stdout --rfc="-(WIP)" >patch &&
+ grep "^Subject:" patch >actual &&
+ test_cmp expect actual
+'
+
test_expect_success '--rfc does not overwrite prefix' '
cat >expect <<-\EOF &&
Subject: [RFC PATCH foobar 1/1] header with . in it
