[PATCH v4 17/44] builtin-am: implement -s/--signoff

[Paul Tan <pyokagan@gmail.com>]

Since d1c5f2a (Add git-am, applymbox replacement., 2005-10-07), git-am
supported the --signoff option which will append a signoff at the end of
the commit messsage. Re-implement this feature in parse_mail() by
calling append_signoff() if the option is set.

Signed-off-by: Paul Tan <pyokagan@gmail.com>
---
 builtin/am.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/builtin/am.c b/builtin/am.c
index 7832ecf..1ffbba1 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -18,6 +18,7 @@
 #include "diffcore.h"
 #include "unpack-trees.h"
 #include "branch.h"
+#include "sequencer.h"
 
 /**
  * Returns 1 if the file is empty or does not exist, 0 otherwise.
@@ -83,6 +84,8 @@ struct am_state {
 
 	int quiet;
 
+	int append_signoff;
+
 	/* override error message when patch failure occurs */
 	const char *resolvemsg;
 };
@@ -377,6 +380,9 @@ static void am_load(struct am_state *state)
 	read_state_file(&sb, state, "quiet", 1);
 	state->quiet = !strcmp(sb.buf, "t");
 
+	read_state_file(&sb, state, "sign", 1);
+	state->append_signoff = !strcmp(sb.buf, "t");
+
 	strbuf_release(&sb);
 }
 
@@ -557,6 +563,8 @@ static void am_setup(struct am_state *state, enum patch_format patch_format,
 
 	write_file(am_path(state, "quiet"), 1, state->quiet ? "t" : "f");
 
+	write_file(am_path(state, "sign"), 1, state->append_signoff ? "t" : "f");
+
 	if (!get_sha1("HEAD", curr_head)) {
 		write_file(am_path(state, "abort-safety"), 1, "%s", sha1_to_hex(curr_head));
 		update_ref("am", "ORIG_HEAD", curr_head, NULL, 0, UPDATE_REFS_DIE_ON_ERR);
@@ -763,6 +771,9 @@ static int parse_mail(struct am_state *state, const char *mail)
 		die_errno(_("could not read '%s'"), am_path(state, "msg"));
 	stripspace(&msg, 0);
 
+	if (state->append_signoff)
+		append_signoff(&msg, 0, 0);
+
 	assert(!state->author_name);
 	state->author_name = strbuf_detach(&author_name, NULL);
 
@@ -1157,6 +1168,8 @@ int cmd_am(int argc, const char **argv, const char *prefix)
 
 	struct option options[] = {
 		OPT__QUIET(&state.quiet, N_("be quiet")),
+		OPT_BOOL('s', "signoff", &state.append_signoff,
+			N_("add a Signed-off-by line to the commit message")),
 		OPT_CALLBACK(0, "patch-format", &patch_format, N_("format"),
 			N_("format the patch(es) are in"),
 			parse_opt_patchformat),
-- 
2.5.0.rc0.76.gb2c6e93