commit --amend: invoke post-rewrite hook

The rough structure of run_rewrite_hook() comes from
run_receive_hook() in receive-pack.

We introduce a --no-post-rewrite option and use it to avoid the hook
when called from git-rebase -i 'edit'.  The next patch will add full
support in git-rebase, and we only want to invoke the hook once.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-commit.c b/builtin-commit.c
index 55676fd874466c70445e81c69cf397cd01380aaf..f476d85293a5e2a79273054dda87073815213328 100644 (file)
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -66,6 +66,7 @@ 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, renew_authorship;
+static int no_post_rewrite;
 static char *untracked_files_arg, *force_date;
 /*
  * The default commit message cleanup mode will remove the lines
@@ -137,6 +138,7 @@ static struct option builtin_commit_options[] = {
        OPT_BOOLEAN('z', "null", &null_termination,
                    "terminate entries with NUL"),
        OPT_BOOLEAN(0, "amend", &amend, "amend previous commit"),
+       OPT_BOOLEAN(0, "no-post-rewrite", &no_post_rewrite, "bypass post-rewrite hook"),
        { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, "mode", "show untracked files, optional modes: all, normal, no. (Default: all)", PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
        OPT_BOOLEAN(0, "allow-empty", &allow_empty, "ok to record an empty change"),
        /* end commit contents options */
@@ -1160,6 +1162,40 @@ static int git_commit_config(const char *k, const char *v, void *cb)
        return git_status_config(k, v, s);
 }
 
+static const char post_rewrite_hook[] = "hooks/post-rewrite";
+
+static int run_rewrite_hook(const unsigned char *oldsha1,
+                           const unsigned char *newsha1)
+{
+       /* oldsha1 SP newsha1 LF NUL */
+       static char buf[2*40 + 3];
+       struct child_process proc;
+       const char *argv[3];
+       int code;
+       size_t n;
+
+       if (access(git_path(post_rewrite_hook), X_OK) < 0)
+               return 0;
+
+       argv[0] = git_path(post_rewrite_hook);
+       argv[1] = "amend";
+       argv[2] = NULL;
+
+       memset(&proc, 0, sizeof(proc));
+       proc.argv = argv;
+       proc.in = -1;
+       proc.stdout_to_stderr = 1;
+
+       code = start_command(&proc);
+       if (code)
+               return code;
+       n = snprintf(buf, sizeof(buf), "%s %s\n",
+                    sha1_to_hex(oldsha1), sha1_to_hex(newsha1));
+       write_in_full(proc.in, buf, n);
+       close(proc.in);
+       return finish_command(&proc);
+}
+
 int cmd_commit(int argc, const char **argv, const char *prefix)
 {
        struct strbuf sb = STRBUF_INIT;
@@ -1303,6 +1339,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 
        rerere(0);
        run_hook(get_index_file(), "post-commit", NULL);
+       if (amend && !no_post_rewrite) {
+               run_rewrite_hook(head_sha1, commit_sha1);
+       }
        if (!quiet)
                print_summary(prefix, commit_sha1);
 

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index c2f6089de8dd74f9740d0ca4c5225248ec1bc1e7..4a69c38349aa3e7e912d03e6842686cfc95bfb9f 100755 (executable)
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -445,7 +445,7 @@ do_next () {
                mark_action_done
                pick_one $sha1 ||
                        die_with_patch $sha1 "Could not apply $sha1... $rest"
-               git commit --amend
+               git commit --amend --no-post-rewrite
                ;;
        edit|e)
                comment_for_reflog edit

diff --git a/t/t5407-post-rewrite-hook.sh b/t/t5407-post-rewrite-hook.sh
new file mode 100755 (executable)
index 0000000..1020af9
--- /dev/null
+++ b/t/t5407-post-rewrite-hook.sh
@@ -0,0 +1,52 @@
+#!/bin/sh
+#
+# Copyright (c) 2010 Thomas Rast
+#
+
+test_description='Test the post-rewrite hook.'
+. ./test-lib.sh
+
+test_expect_success 'setup' '
+       test_commit A foo A &&
+       test_commit B foo B &&
+       test_commit C foo C &&
+       test_commit D foo D
+'
+
+mkdir .git/hooks
+
+cat >.git/hooks/post-rewrite <<EOF
+#!/bin/sh
+echo \$@ > "$TRASH_DIRECTORY"/post-rewrite.args
+cat > "$TRASH_DIRECTORY"/post-rewrite.data
+EOF
+chmod u+x .git/hooks/post-rewrite
+
+clear_hook_input () {
+       rm -f post-rewrite.args post-rewrite.data
+}
+
+verify_hook_input () {
+       test_cmp "$TRASH_DIRECTORY"/post-rewrite.args expected.args &&
+       test_cmp "$TRASH_DIRECTORY"/post-rewrite.data expected.data
+}
+
+test_expect_success 'git commit --amend' '
+       clear_hook_input &&
+       echo "D new message" > newmsg &&
+       oldsha=$(git rev-parse HEAD^0) &&
+       git commit -Fnewmsg --amend &&
+       echo amend > expected.args &&
+       echo $oldsha $(git rev-parse HEAD^0) > expected.data &&
+       verify_hook_input
+'
+
+test_expect_success 'git commit --amend --no-post-rewrite' '
+       clear_hook_input &&
+       echo "D new message again" > newmsg &&
+       git commit --no-post-rewrite -Fnewmsg --amend &&
+       test ! -f post-rewrite.args &&
+       test ! -f post-rewrite.data
+'
+
+test_done