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format-patch: add --reroll-count=$N option

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The --reroll-count=$N option, when given a positive integer:

 - Adds " v$N" to the subject prefix specified.  As the default
   subject prefix string is "PATCH", --reroll-count=2 makes it
   "PATCH v2".

 - Prefixes "v$N-" to the names used for output files.  The cover
   letter, whose name is usually 0000-cover-letter.patch, becomes
   v2-0000-cover-letter.patch when given --reroll-count=2.

This allows users to use the same --output-directory for multiple
iterations of the same series, without letting the output for a
newer round overwrite output files from the earlier rounds.  The
user can incorporate materials from earlier rounds to update the
newly minted iteration, and use "send-email v2-*.patch" to send out
the patches belonging to the second iteration easily.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2012-12-22 00:21:23 -08:00
parent d28b5d47ab
commit 5fe10fe80a
3 changed files with 14 additions and 0 deletions
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11
builtin/log.c
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@ -1061,6 +1061,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
struct strbuf buf = STRBUF_INIT;
int use_patch_format = 0;
int quiet = 0;
int reroll_count = -1;
char *branch_name = NULL;
const struct option builtin_format_patch_options[] = {
{ OPTION_CALLBACK, 'n', "numbered", &numbered, NULL,
@ -1080,6 +1081,8 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
N_("use <sfx> instead of '.patch'")),
OPT_INTEGER(0, "start-number", &start_number,
N_("start numbering patches at <n> instead of 1")),
OPT_INTEGER(0, "reroll-count", &reroll_count,
N_("mark the series as Nth re-roll")),
{ OPTION_CALLBACK, 0, "subject-prefix", &rev, N_("prefix"),
N_("Use [<prefix>] instead of [PATCH]"),
PARSE_OPT_NONEG, subject_prefix_callback },
@ -1152,6 +1155,14 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN |
PARSE_OPT_KEEP_DASHDASH);
if (0 < reroll_count) {
struct strbuf sprefix = STRBUF_INIT;
strbuf_addf(&sprefix, "%s v%d",
rev.subject_prefix, reroll_count);
rev.reroll_count = reroll_count;
rev.subject_prefix = strbuf_detach(&sprefix, NULL);
}
if (do_signoff) {
const char *committer;
const char *endpos;