diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 3ea80c820fb..d227cec9ba5 100644
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -9,7 +9,7 @@ SYNOPSIS
--------
[verse]
'git commit' [-a | --interactive] [-s] [-v] [-u<mode>] [--amend] [--dry-run]
- [(-c | -C) <commit>] [-F <file> | -m <msg>]
+ [(-c | -C) <commit>] [-F <file> | -m <msg>] [--reset-author]
[--allow-empty] [--no-verify] [-e] [--author=<author>]
[--cleanup=<mode>] [--] [[-i | -o ]<file>...]
@@ -69,6 +69,11 @@ OPTIONS
Like '-C', but with '-c' the editor is invoked, so that
the user can further edit the commit message.
+--reset-author::
+ When used with -C/-c/--amend options, declare that the
+ authorship of the resulting commit now belongs of the committer.
+ This also renews the author timestamp.
+
-F <file>::
--file=<file>::
Take the commit message from the given file. Use '-' to
diff --git a/builtin-commit.c b/builtin-commit.c
index 09d28405ecd..e93a647c59f 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -51,7 +51,7 @@ static const char *template_file;
static char *edit_message, *use_message;
static char *author_name, *author_email, *author_date;
static int all, edit_flag, also, interactive, only, amend, signoff;
-static int quiet, verbose, no_verify, allow_empty, dry_run;
+static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
static char *untracked_files_arg;
/*
* The default commit message cleanup mode will remove the lines
@@ -91,8 +91,9 @@ static struct option builtin_commit_options[] = {
OPT_FILENAME('F', "file", &logfile, "read log from file"),
OPT_STRING(0, "author", &force_author, "AUTHOR", "override author for commit"),
OPT_CALLBACK('m', "message", &message, "MESSAGE", "specify commit message", opt_parse_m),
- OPT_STRING('c', "reedit-message", &edit_message, "COMMIT", "reuse and edit message from specified commit "),
+ OPT_STRING('c', "reedit-message", &edit_message, "COMMIT", "reuse and edit message from specified commit"),
OPT_STRING('C', "reuse-message", &use_message, "COMMIT", "reuse message from specified commit"),
+ OPT_BOOLEAN(0, "reset-author", &renew_authorship, "the commit is authored by me now (used with -C-c/--amend)"),
OPT_BOOLEAN('s', "signoff", &signoff, "add Signed-off-by:"),
OPT_FILENAME('t', "template", &template_file, "use specified template file"),
OPT_BOOLEAN('e', "edit", &edit_flag, "force edit of commit"),
@@ -381,7 +382,7 @@ static void determine_author_info(void)
email = getenv("GIT_AUTHOR_EMAIL");
date = getenv("GIT_AUTHOR_DATE");
- if (use_message) {
+ if (use_message && !renew_authorship) {
const char *a, *lb, *rb, *eol;
a = strstr(use_message_buffer, "\nauthor ");
@@ -747,6 +748,9 @@ static int parse_and_validate_options(int argc, const char *argv[],
if (force_author && !strchr(force_author, '>'))
force_author = find_author_by_nickname(force_author);
+ if (force_author && renew_authorship)
+ die("Using both --reset-author and --author does not make sense");
+
if (logfile || message.len || use_message)
use_editor = 0;
if (edit_flag)
@@ -780,6 +784,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
use_message = edit_message;
if (amend && !use_message)
use_message = "HEAD";
+ if (!use_message && renew_authorship)
+ die("--reset-author can be used only with -C, -c or --amend.");
if (use_message) {
unsigned char sha1[20];
static char utf8[] = "UTF-8";
diff --git a/t/t7509-commit.sh b/t/t7509-commit.sh
new file mode 100755
index 00000000000..d52c060b061
--- /dev/null
+++ b/t/t7509-commit.sh
@@ -0,0 +1,114 @@
+#!/bin/sh
+#
+# Copyright (c) 2009 Erick Mattos
+#
+
+test_description='git commit --reset-author'
+
+. ./test-lib.sh
+
+author_header () {
+ git cat-file commit "$1" |
+ sed -n -e '/^$/q' -e '/^author /p'
+}
+
+message_body () {
+ git cat-file commit "$1" |
+ sed -e '1,/^$/d'
+}
+
+test_expect_success '-C option copies authorship and message' '
+ echo "Initial" >foo &&
+ git add foo &&
+ test_tick &&
+ git commit -m "Initial Commit" --author Frigate\ \<flying@over.world\> &&
+ git tag Initial &&
+ echo "Test 1" >>foo &&
+ test_tick &&
+ git commit -a -C Initial &&
+ author_header Initial >expect &&
+ author_header HEAD >actual &&
+ test_cmp expect actual &&
+
+ message_body Initial >expect &&
+ message_body HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '-C option copies only the message with --reset-author' '
+ echo "Test 2" >>foo &&
+ test_tick &&
+ git commit -a -C Initial --reset-author &&
+ echo "author $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL> $GIT_AUTHOR_DATE" >expect &&
+ author_header HEAD >actual
+ test_cmp expect actual &&
+
+ message_body Initial >expect &&
+ message_body HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '-c option copies authorship and message' '
+ echo "Test 3" >>foo &&
+ test_tick &&
+ EDITOR=: VISUAL=: git commit -a -c Initial &&
+ author_header Initial >expect &&
+ author_header HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '-c option copies only the message with --reset-author' '
+ echo "Test 4" >>foo &&
+ test_tick &&
+ EDITOR=: VISUAL=: git commit -a -c Initial --reset-author &&
+ echo "author $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL> $GIT_AUTHOR_DATE" >expect &&
+ author_header HEAD >actual &&
+ test_cmp expect actual &&
+
+ message_body Initial >expect &&
+ message_body HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '--amend option copies authorship' '
+ git checkout Initial &&
+ echo "Test 5" >>foo &&
+ test_tick &&
+ git commit -a --amend -m "amend test" &&
+ author_header Initial >expect &&
+ author_header HEAD >actual &&
+
+ echo "amend test" >expect &&
+ message_body HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '--reset-author makes the commit ours even with --amend option' '
+ git checkout Initial &&
+ echo "Test 6" >>foo &&
+ test_tick &&
+ git commit -a --reset-author -m "Changed again" --amend &&
+ echo "author $GIT_AUTHOR_NAME <$GIT_AUTHOR_EMAIL> $GIT_AUTHOR_DATE" >expect &&
+ author_header HEAD >actual &&
+ test_cmp expect actual &&
+
+ echo "Changed again" >expect &&
+ message_body HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success '--reset-author and --author are mutually exclusive' '
+ git checkout Initial &&
+ echo "Test 7" >>foo &&
+ test_tick &&
+ test_must_fail git commit -a --reset-author --author="Xyzzy <frotz@nitfol.xz>"
+'
+
+test_expect_success '--reset-author should be rejected without -c/-C/--amend' '
+ git checkout Initial &&
+ echo "Test 7" >>foo &&
+ test_tick &&
+ test_must_fail git commit -a --reset-author -m done
+'
+
+test_done