1 files changed, 443 insertions, 191 deletions

diff --git a/sequencer.c b/sequencer.c
index 4d5abb9..63a2094 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -30,6 +30,7 @@
 #include "oidset.h"
 #include "commit-slab.h"
 #include "alias.h"
+#include "commit-reach.h"
 #include "rebase-interactive.h"
 
 #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
@@ -67,12 +68,12 @@ static GIT_PATH_FUNC(rebase_path_done, "rebase-merge/done")
  * The file to keep track of how many commands were already processed (e.g.
  * for the prompt).
  */
-static GIT_PATH_FUNC(rebase_path_msgnum, "rebase-merge/msgnum");
+static GIT_PATH_FUNC(rebase_path_msgnum, "rebase-merge/msgnum")
 /*
  * The file to keep track of how many commands are to be processed in total
  * (e.g. for the prompt).
  */
-static GIT_PATH_FUNC(rebase_path_msgtotal, "rebase-merge/end");
+static GIT_PATH_FUNC(rebase_path_msgtotal, "rebase-merge/end")
 /*
  * The commit message that is planned to be used for any changes that
  * need to be committed following a user interaction.
@@ -230,13 +231,16 @@ static const char *get_todo_path(const struct replay_opts *opts)
  * Returns 3 when sob exists within conforming footer as last entry
  */
 static int has_conforming_footer(struct strbuf *sb, struct strbuf *sob,
-	int ignore_footer)
+	size_t ignore_footer)
 {
+	struct process_trailer_options opts = PROCESS_TRAILER_OPTIONS_INIT;
 	struct trailer_info info;
-	int i;
+	size_t i;
 	int found_sob = 0, found_sob_last = 0;
 
-	trailer_info_get(&info, sb->buf);
+	opts.no_divider = 1;
+
+	trailer_info_get(&info, sb->buf, &opts);
 
 	if (info.trailer_start == info.trailer_end)
 		return 0;
@@ -312,7 +316,7 @@ static const char *action_name(const struct replay_opts *opts)
 	case REPLAY_INTERACTIVE_REBASE:
 		return N_("rebase -i");
 	}
-	die(_("Unknown action: %d"), opts->action);
+	die(_("unknown action: %d"), opts->action);
 }
 
 struct commit_message {
@@ -438,7 +442,7 @@ static int read_oneliner(struct strbuf *buf,
 
 static struct tree *empty_tree(void)
 {
-	return lookup_tree(the_hash_algo->empty_tree);
+	return lookup_tree(the_repository, the_repository->hash_algo->empty_tree);
 }
 
 static int error_dirty_index(struct replay_opts *opts)
@@ -475,8 +479,8 @@ static int fast_forward_to(const struct object_id *to, const struct object_id *f
 	struct strbuf sb = STRBUF_INIT;
 	struct strbuf err = STRBUF_INIT;
 
-	read_cache();
-	if (checkout_fast_forward(from, to, 1))
+	read_index(&the_index);
+	if (checkout_fast_forward(the_repository, from, to, 1))
 		return -1; /* the callee should have complained already */
 
 	strbuf_addf(&sb, _("%s: fast-forward"), _(action_name(opts)));
@@ -599,7 +603,7 @@ static int is_index_unchanged(void)
 	if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL))
 		return error(_("could not resolve HEAD commit"));
 
-	head_commit = lookup_commit(&head_oid);
+	head_commit = lookup_commit(the_repository, &head_oid);
 
 	/*
 	 * If head_commit is NULL, check_commit, called from
@@ -615,7 +619,7 @@ static int is_index_unchanged(void)
 	if (!(cache_tree_oid = get_cache_tree_oid()))
 		return -1;
 
-	return !oidcmp(cache_tree_oid, get_commit_tree_oid(head_commit));
+	return oideq(cache_tree_oid, get_commit_tree_oid(head_commit));
 }
 
 static int write_author_script(const char *message)
@@ -644,7 +648,7 @@ missing_author:
 		else if (*message != '\'')
 			strbuf_addch(&buf, *(message++));
 		else
-			strbuf_addf(&buf, "'\\\\%c'", *(message++));
+			strbuf_addf(&buf, "'\\%c'", *(message++));
 	strbuf_addstr(&buf, "'\nGIT_AUTHOR_EMAIL='");
 	while (*message && *message != '\n' && *message != '\r')
 		if (skip_prefix(message, "> ", &message))
@@ -652,45 +656,144 @@ missing_author:
 		else if (*message != '\'')
 			strbuf_addch(&buf, *(message++));
 		else
-			strbuf_addf(&buf, "'\\\\%c'", *(message++));
+			strbuf_addf(&buf, "'\\%c'", *(message++));
 	strbuf_addstr(&buf, "'\nGIT_AUTHOR_DATE='@");
 	while (*message && *message != '\n' && *message != '\r')
 		if (*message != '\'')
 			strbuf_addch(&buf, *(message++));
 		else
-			strbuf_addf(&buf, "'\\\\%c'", *(message++));
+			strbuf_addf(&buf, "'\\%c'", *(message++));
+	strbuf_addch(&buf, '\'');
 	res = write_message(buf.buf, buf.len, rebase_path_author_script(), 1);
 	strbuf_release(&buf);
 	return res;
 }
 
+/**
+ * Take a series of KEY='VALUE' lines where VALUE part is
+ * sq-quoted, and append <KEY, VALUE> at the end of the string list
+ */
+static int parse_key_value_squoted(char *buf, struct string_list *list)
+{
+	while (*buf) {
+		struct string_list_item *item;
+		char *np;
+		char *cp = strchr(buf, '=');
+		if (!cp) {
+			np = strchrnul(buf, '\n');
+			return error(_("no key present in '%.*s'"),
+				     (int) (np - buf), buf);
+		}
+		np = strchrnul(cp, '\n');
+		*cp++ = '\0';
+		item = string_list_append(list, buf);
+
+		buf = np + (*np == '\n');
+		*np = '\0';
+		cp = sq_dequote(cp);
+		if (!cp)
+			return error(_("unable to dequote value of '%s'"),
+				     item->string);
+		item->util = xstrdup(cp);
+	}
+	return 0;
+}
+
+/**
+ * Reads and parses the state directory's "author-script" file, and sets name,
+ * email and date accordingly.
+ * Returns 0 on success, -1 if the file could not be parsed.
+ *
+ * The author script is of the format:
+ *
+ *	GIT_AUTHOR_NAME='$author_name'
+ *	GIT_AUTHOR_EMAIL='$author_email'
+ *	GIT_AUTHOR_DATE='$author_date'
+ *
+ * where $author_name, $author_email and $author_date are quoted. We are strict
+ * with our parsing, as the file was meant to be eval'd in the old
+ * git-am.sh/git-rebase--interactive.sh scripts, and thus if the file differs
+ * from what this function expects, it is better to bail out than to do
+ * something that the user does not expect.
+ */
+int read_author_script(const char *path, char **name, char **email, char **date,
+		       int allow_missing)
+{
+	struct strbuf buf = STRBUF_INIT;
+	struct string_list kv = STRING_LIST_INIT_DUP;
+	int retval = -1; /* assume failure */
+	int i, name_i = -2, email_i = -2, date_i = -2, err = 0;
+
+	if (strbuf_read_file(&buf, path, 256) <= 0) {
+		strbuf_release(&buf);
+		if (errno == ENOENT && allow_missing)
+			return 0;
+		else
+			return error_errno(_("could not open '%s' for reading"),
+					   path);
+	}
+
+	if (parse_key_value_squoted(buf.buf, &kv))
+		goto finish;
+
+	for (i = 0; i < kv.nr; i++) {
+		if (!strcmp(kv.items[i].string, "GIT_AUTHOR_NAME")) {
+			if (name_i != -2)
+				name_i = error(_("'GIT_AUTHOR_NAME' already given"));
+			else
+				name_i = i;
+		} else if (!strcmp(kv.items[i].string, "GIT_AUTHOR_EMAIL")) {
+			if (email_i != -2)
+				email_i = error(_("'GIT_AUTHOR_EMAIL' already given"));
+			else
+				email_i = i;
+		} else if (!strcmp(kv.items[i].string, "GIT_AUTHOR_DATE")) {
+			if (date_i != -2)
+				date_i = error(_("'GIT_AUTHOR_DATE' already given"));
+			else
+				date_i = i;
+		} else {
+			err = error(_("unknown variable '%s'"),
+				    kv.items[i].string);
+		}
+	}
+	if (name_i == -2)
+		error(_("missing 'GIT_AUTHOR_NAME'"));
+	if (email_i == -2)
+		error(_("missing 'GIT_AUTHOR_EMAIL'"));
+	if (date_i == -2)
+		error(_("missing 'GIT_AUTHOR_DATE'"));
+	if (date_i < 0 || email_i < 0 || date_i < 0 || err)
+		goto finish;
+	*name = kv.items[name_i].util;
+	*email = kv.items[email_i].util;
+	*date = kv.items[date_i].util;
+	retval = 0;
+finish:
+	string_list_clear(&kv, !!retval);
+	strbuf_release(&buf);
+	return retval;
+}
+
 /*
- * Read a list of environment variable assignments (such as the author-script
- * file) into an environment block. Returns -1 on error, 0 otherwise.
+ * Read a GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL AND GIT_AUTHOR_DATE from a
+ * file with shell quoting into struct argv_array. Returns -1 on
+ * error, 0 otherwise.
  */
 static int read_env_script(struct argv_array *env)
 {
-	struct strbuf script = STRBUF_INIT;
-	int i, count = 0;
-	char *p, *p2;
+	char *name, *email, *date;
 
-	if (strbuf_read_file(&script, rebase_path_author_script(), 256) <= 0)
+	if (read_author_script(rebase_path_author_script(),
+			       &name, &email, &date, 0))
 		return -1;
 
-	for (p = script.buf; *p; p++)
-		if (skip_prefix(p, "'\\\\''", (const char **)&p2))
-			strbuf_splice(&script, p - script.buf, p2 - p, "'", 1);
-		else if (*p == '\'')
-			strbuf_splice(&script, p-- - script.buf, 1, "", 0);
-		else if (*p == '\n') {
-			*p = '\0';
-			count++;
-		}
-
-	for (i = 0, p = script.buf; i < count; i++) {
-		argv_array_push(env, p);
-		p += strlen(p) + 1;
-	}
+	argv_array_pushf(env, "GIT_AUTHOR_NAME=%s", name);
+	argv_array_pushf(env, "GIT_AUTHOR_EMAIL=%s", email);
+	argv_array_pushf(env, "GIT_AUTHOR_DATE=%s", date);
+	free(name);
+	free(email);
+	free(date);
 
 	return 0;
 }
@@ -710,46 +813,28 @@ static char *get_author(const char *message)
 /* Read author-script and return an ident line (author <email> timestamp) */
 static const char *read_author_ident(struct strbuf *buf)
 {
-	const char *keys[] = {
-		"GIT_AUTHOR_NAME=", "GIT_AUTHOR_EMAIL=", "GIT_AUTHOR_DATE="
-	};
-	char *in, *out, *eol;
-	int i = 0, len;
+	struct strbuf out = STRBUF_INIT;
+	char *name, *email, *date;
 
-	if (strbuf_read_file(buf, rebase_path_author_script(), 256) <= 0)
+	if (read_author_script(rebase_path_author_script(),
+			       &name, &email, &date, 0))
 		return NULL;
 
-	/* dequote values and construct ident line in-place */
-	for (in = out = buf->buf; i < 3 && in - buf->buf < buf->len; i++) {
-		if (!skip_prefix(in, keys[i], (const char **)&in)) {
-			warning("could not parse '%s' (looking for '%s'",
-				rebase_path_author_script(), keys[i]);
-			return NULL;
-		}
-
-		eol = strchrnul(in, '\n');
-		*eol = '\0';
-		sq_dequote(in);
-		len = strlen(in);
-
-		if (i > 0) /* separate values by spaces */
-			*(out++) = ' ';
-		if (i == 1) /* email needs to be surrounded by <...> */
-			*(out++) = '<';
-		memmove(out, in, len);
-		out += len;
-		if (i == 1) /* email needs to be surrounded by <...> */
-			*(out++) = '>';
-		in = eol + 1;
-	}
-
-	if (i < 3) {
-		warning("could not parse '%s' (looking for '%s')",
-			rebase_path_author_script(), keys[i]);
+	/* validate date since fmt_ident() will die() on bad value */
+	if (parse_date(date, &out)){
+		warning(_("invalid date format '%s' in '%s'"),
+			date, rebase_path_author_script());
+		strbuf_release(&out);
 		return NULL;
 	}
 
-	buf->len = out - buf->buf;
+	strbuf_reset(&out);
+	strbuf_addstr(&out, fmt_ident(name, email, date, 0));
+	strbuf_swap(buf, &out);
+	strbuf_release(&out);
+	free(name);
+	free(email);
+	free(date);
 	return buf->buf;
 }
 
@@ -811,11 +896,18 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
 
 	if ((flags & CREATE_ROOT_COMMIT) && !(flags & AMEND_MSG)) {
 		struct strbuf msg = STRBUF_INIT, script = STRBUF_INIT;
-		const char *author = is_rebase_i(opts) ?
-			read_author_ident(&script) : NULL;
+		const char *author = NULL;
 		struct object_id root_commit, *cache_tree_oid;
 		int res = 0;
 
+		if (is_rebase_i(opts)) {
+			author = read_author_ident(&script);
+			if (!author) {
+				strbuf_release(&script);
+				return -1;
+			}
+		}
+
 		if (!defmsg)
 			BUG("root commit without message");
 
@@ -876,7 +968,7 @@ static int run_git_commit(const char *defmsg, struct replay_opts *opts,
 	if ((flags & ALLOW_EMPTY))
 		argv_array_push(&cmd.args, "--allow-empty");
 
-	if (opts->allow_empty_message)
+	if (!(flags & EDIT_MSG))
 		argv_array_push(&cmd.args, "--allow-empty-message");
 
 	if (is_rebase_i(opts) && !(flags & EDIT_MSG))
@@ -1105,7 +1197,7 @@ void print_commit_summary(const char *prefix, const struct object_id *oid,
 	struct strbuf author_ident = STRBUF_INIT;
 	struct strbuf committer_ident = STRBUF_INIT;
 
-	commit = lookup_commit(oid);
+	commit = lookup_commit(the_repository, oid);
 	if (!commit)
 		die(_("couldn't look up newly created commit"));
 	if (parse_commit(commit))
@@ -1138,7 +1230,7 @@ void print_commit_summary(const char *prefix, const struct object_id *oid,
 	strbuf_release(&author_ident);
 	strbuf_release(&committer_ident);
 
-	init_revisions(&rev, prefix);
+	repo_init_revisions(the_repository, &rev, prefix);
 	setup_revisions(0, NULL, &rev, NULL);
 
 	rev.diff = 1;
@@ -1180,10 +1272,10 @@ static int parse_head(struct commit **head)
 	if (get_oid("HEAD", &oid)) {
 		current_head = NULL;
 	} else {
-		current_head = lookup_commit_reference(&oid);
+		current_head = lookup_commit_reference(the_repository, &oid);
 		if (!current_head)
 			return error(_("could not parse HEAD"));
-		if (oidcmp(&oid, &current_head->object.oid)) {
+		if (!oideq(&oid, &current_head->object.oid)) {
 			warning(_("HEAD %s is not a commit!"),
 				oid_to_hex(&oid));
 		}
@@ -1248,14 +1340,14 @@ static int try_to_commit(struct strbuf *msg, const char *author,
 		commit_list_insert(current_head, &parents);
 	}
 
-	if (write_cache_as_tree(&tree, 0, NULL)) {
+	if (write_index_as_tree(&tree, &the_index, get_index_file(), 0, NULL)) {
 		res = error(_("git write-tree failed to write a tree"));
 		goto out;
 	}
 
-	if (!(flags & ALLOW_EMPTY) && !oidcmp(current_head ?
-					      get_commit_tree_oid(current_head) :
-					      the_hash_algo->empty_tree, &tree)) {
+	if (!(flags & ALLOW_EMPTY) && oideq(current_head ?
+					    get_commit_tree_oid(current_head) :
+					    the_hash_algo->empty_tree, &tree)) {
 		res = 1; /* run 'git commit' to display error message */
 		goto out;
 	}
@@ -1279,7 +1371,7 @@ static int try_to_commit(struct strbuf *msg, const char *author,
 
 	if (cleanup != COMMIT_MSG_CLEANUP_NONE)
 		strbuf_stripspace(msg, cleanup == COMMIT_MSG_CLEANUP_ALL);
-	if (!opts->allow_empty_message && message_is_empty(msg, cleanup)) {
+	if ((flags & EDIT_MSG) && message_is_empty(msg, cleanup)) {
 		res = 1; /* run 'git commit' to display error message */
 		goto out;
 	}
@@ -1360,7 +1452,7 @@ static int is_original_commit_empty(struct commit *commit)
 		ptree_oid = the_hash_algo->empty_tree; /* commit is root */
 	}
 
-	return !oidcmp(ptree_oid, get_commit_tree_oid(commit));
+	return oideq(ptree_oid, get_commit_tree_oid(commit));
 }
 
 /*
@@ -1416,6 +1508,7 @@ enum todo_command {
 	TODO_SQUASH,
 	/* commands that do something else than handling a single commit */
 	TODO_EXEC,
+	TODO_BREAK,
 	TODO_LABEL,
 	TODO_RESET,
 	TODO_MERGE,
@@ -1437,6 +1530,7 @@ static struct {
 	{ 'f', "fixup" },
 	{ 's', "squash" },
 	{ 'x', "exec" },
+	{ 'b', "break" },
 	{ 'l', "label" },
 	{ 't', "reset" },
 	{ 'm', "merge" },
@@ -1449,7 +1543,7 @@ static const char *command_to_string(const enum todo_command command)
 {
 	if (command < TODO_COMMENT)
 		return todo_command_info[command].str;
-	die("Unknown command: %d", command);
+	die(_("unknown command: %d"), command);
 }
 
 static char command_to_char(const enum todo_command command)
@@ -1515,7 +1609,7 @@ static int update_squash_messages(enum todo_command command,
 
 		if (get_oid("HEAD", &head))
 			return error(_("need a HEAD to fixup"));
-		if (!(head_commit = lookup_commit_reference(&head)))
+		if (!(head_commit = lookup_commit_reference(the_repository, &head)))
 			return error(_("could not read HEAD"));
 		if (!(head_message = get_commit_buffer(head_commit, NULL)))
 			return error(_("could not read HEAD's commit message"));
@@ -1547,13 +1641,13 @@ static int update_squash_messages(enum todo_command command,
 		unlink(rebase_path_fixup_msg());
 		strbuf_addf(&buf, "\n%c ", comment_line_char);
 		strbuf_addf(&buf, _("This is the commit message #%d:"),
-			    ++opts->current_fixup_count);
+			    ++opts->current_fixup_count + 1);
 		strbuf_addstr(&buf, "\n\n");
 		strbuf_addstr(&buf, body);
 	} else if (command == TODO_FIXUP) {
 		strbuf_addf(&buf, "\n%c ", comment_line_char);
 		strbuf_addf(&buf, _("The commit message #%d will be skipped:"),
-			    ++opts->current_fixup_count);
+			    ++opts->current_fixup_count + 1);
 		strbuf_addstr(&buf, "\n\n");
 		strbuf_add_commented_lines(&buf, body, strlen(body));
 	} else
@@ -1634,13 +1728,13 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 		 * that represents the "current" state for merge-recursive
 		 * to work on.
 		 */
-		if (write_cache_as_tree(&head, 0, NULL))
+		if (write_index_as_tree(&head, &the_index, get_index_file(), 0, NULL))
 			return error(_("your index file is unmerged."));
 	} else {
 		unborn = get_oid("HEAD", &head);
 		/* Do we want to generate a root commit? */
 		if (is_pick_or_similar(command) && opts->have_squash_onto &&
-		    !oidcmp(&head, &opts->squash_onto)) {
+		    oideq(&head, &opts->squash_onto)) {
 			if (is_fixup(command))
 				return error(_("cannot fixup root commit"));
 			flags |= CREATE_ROOT_COMMIT;
@@ -1683,7 +1777,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 			oid_to_hex(&commit->object.oid));
 
 	if (opts->allow_ff && !is_fixup(command) &&
-	    ((parent && !oidcmp(&parent->object.oid, &head)) ||
+	    ((parent && oideq(&parent->object.oid, &head)) ||
 	     (!parent && unborn))) {
 		if (is_rebase_i(opts))
 			write_author_script(msg.message);
@@ -1793,7 +1887,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 
 		commit_list_insert(base, &common);
 		commit_list_insert(next, &remotes);
-		res |= try_merge_command(opts->strategy,
+		res |= try_merge_command(the_repository, opts->strategy,
 					 opts->xopts_nr, (const char **)opts->xopts,
 					common, oid_to_hex(&head), remotes);
 		free_commit_list(common);
@@ -1822,7 +1916,7 @@ static int do_pick_commit(enum todo_command command, struct commit *commit,
 		      : _("could not apply %s... %s"),
 		      short_commit_name(commit), msg.subject);
 		print_advice(res == 1, opts);
-		rerere(opts->allow_rerere_auto);
+		repo_rerere(the_repository, opts->allow_rerere_auto);
 		goto leave;
 	}
 
@@ -1868,8 +1962,6 @@ static int prepare_revs(struct replay_opts *opts)
 	if (prepare_revision_walk(opts->revs))
 		return error(_("revision walk setup failed"));
 
-	if (!opts->revs->commits)
-		return error(_("empty commit set passed"));
 	return 0;
 }
 
@@ -1877,7 +1969,7 @@ static int read_and_refresh_cache(struct replay_opts *opts)
 {
 	struct lock_file index_lock = LOCK_INIT;
 	int index_fd = hold_locked_index(&index_lock, 0);
-	if (read_index_preload(&the_index, NULL) < 0) {
+	if (read_index_preload(&the_index, NULL, 0) < 0) {
 		rollback_lock_file(&index_lock);
 		return error(_("git %s: failed to read the index"),
 			_(action_name(opts)));
@@ -1952,7 +2044,8 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol)
 		if (skip_prefix(bol, todo_command_info[i].str, &bol)) {
 			item->command = i;
 			break;
-		} else if (bol[1] == ' ' && *bol == todo_command_info[i].c) {
+		} else if ((bol + 1 == eol || bol[1] == ' ') &&
+			   *bol == todo_command_info[i].c) {
 			bol++;
 			item->command = i;
 			break;
@@ -1964,7 +2057,7 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol)
 	padding = strspn(bol, " \t");
 	bol += padding;
 
-	if (item->command == TODO_NOOP) {
+	if (item->command == TODO_NOOP || item->command == TODO_BREAK) {
 		if (bol != eol)
 			return error(_("%s does not accept arguments: '%s'"),
 				     command_to_string(item->command), bol);
@@ -2013,7 +2106,7 @@ static int parse_insn_line(struct todo_item *item, const char *bol, char *eol)
 	if (status < 0)
 		return -1;
 
-	item->commit = lookup_commit_reference(&commit_oid);
+	item->commit = lookup_commit_reference(the_repository, &commit_oid);
 	return !item->commit;
 }
 
@@ -2335,7 +2428,7 @@ int write_basic_state(struct replay_opts *opts, const char *head_name,
 		write_file(rebase_path_quiet(), "\n");
 
 	if (opts->verbose)
-		write_file(rebase_path_verbose(), "");
+		write_file(rebase_path_verbose(), "%s", "");
 	if (opts->strategy)
 		write_file(rebase_path_strategy(), "%s\n", opts->strategy);
 	if (opts->xopts_nr > 0)
@@ -2381,6 +2474,10 @@ static int walk_revs_populate_todo(struct todo_list *todo_list,
 			short_commit_name(commit), subject_len, subject);
 		unuse_commit_buffer(commit, commit_buffer);
 	}
+
+	if (!todo_list->nr)
+		return error(_("empty commit set passed"));
+
 	return 0;
 }
 
@@ -2440,7 +2537,7 @@ static int rollback_is_safe(void)
 	if (get_oid("HEAD", &actual_head))
 		oidclr(&actual_head);
 
-	return !oidcmp(&actual_head, &expected_head);
+	return oideq(&actual_head, &expected_head);
 }
 
 static int reset_for_rollback(const struct object_id *oid)
@@ -2613,7 +2710,7 @@ static int make_patch(struct commit *commit, struct replay_opts *opts)
 
 	strbuf_addf(&buf, "%s/patch", get_dir(opts));
 	memset(&log_tree_opt, 0, sizeof(log_tree_opt));
-	init_revisions(&log_tree_opt, NULL);
+	repo_init_revisions(the_repository, &log_tree_opt, NULL);
 	log_tree_opt.abbrev = 0;
 	log_tree_opt.diff = 1;
 	log_tree_opt.diffopt.output_format = DIFF_FORMAT_PATCH;
@@ -2657,23 +2754,39 @@ static int error_with_patch(struct commit *commit,
 	const char *subject, int subject_len,
 	struct replay_opts *opts, int exit_code, int to_amend)
 {
-	if (make_patch(commit, opts))
-		return -1;
+	if (commit) {
+		if (make_patch(commit, opts))
+			return -1;
+	} else if (copy_file(rebase_path_message(),
+			     git_path_merge_msg(the_repository), 0666))
+		return error(_("unable to copy '%s' to '%s'"),
+			     git_path_merge_msg(the_repository), rebase_path_message());
 
 	if (to_amend) {
 		if (intend_to_amend())
 			return -1;
 
-		fprintf(stderr, "You can amend the commit now, with\n"
-			"\n"
-			"  git commit --amend %s\n"
-			"\n"
-			"Once you are satisfied with your changes, run\n"
-			"\n"
-			"  git rebase --continue\n", gpg_sign_opt_quoted(opts));
-	} else if (exit_code)
-		fprintf(stderr, "Could not apply %s... %.*s\n",
-			short_commit_name(commit), subject_len, subject);
+		fprintf(stderr,
+			_("You can amend the commit now, with\n"
+			  "\n"
+			  "  git commit --amend %s\n"
+			  "\n"
+			  "Once you are satisfied with your changes, run\n"
+			  "\n"
+			  "  git rebase --continue\n"),
+			gpg_sign_opt_quoted(opts));
+	} else if (exit_code) {
+		if (commit)
+			fprintf_ln(stderr, _("Could not apply %s... %.*s"),
+				   short_commit_name(commit), subject_len, subject);
+		else
+			/*
+			 * We don't have the hash of the parent so
+			 * just print the line from the todo file.
+			 */
+			fprintf_ln(stderr, _("Could not merge %.*s"),
+				   subject_len, subject);
+	}
 
 	return exit_code;
 }
@@ -2701,6 +2814,8 @@ static int do_exec(const char *command_line)
 	fprintf(stderr, "Executing: %s\n", command_line);
 	child_argv[0] = command_line;
 	argv_array_pushf(&child_env, "GIT_DIR=%s", absolute_path(get_git_dir()));
+	argv_array_pushf(&child_env, "GIT_WORK_TREE=%s",
+			 absolute_path(get_git_work_tree()));
 	status = run_command_v_opt_cd_env(child_argv, RUN_USING_SHELL, NULL,
 					  child_env.argv);
 
@@ -2784,7 +2899,7 @@ static int do_label(const char *name, int len)
 	struct object_id head_oid;
 
 	if (len == 1 && *name == '#')
-		return error("Illegal label name: '%.*s'", len, name);
+		return error(_("illegal label name: '%.*s'"), len, name);
 
 	strbuf_addf(&ref_name, "refs/rewritten/%.*s", len, name);
 	strbuf_addf(&msg, "rebase -i (label) '%.*s'", len, name);
@@ -2825,7 +2940,7 @@ static int do_reset(const char *name, int len, struct replay_opts *opts)
 	struct tree_desc desc;
 	struct tree *tree;
 	struct unpack_trees_options unpack_tree_opts;
-	int ret = 0, i;
+	int ret = 0;
 
 	if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0)
 		return -1;
@@ -2845,10 +2960,13 @@ static int do_reset(const char *name, int len, struct replay_opts *opts)
 		}
 		oidcpy(&oid, &opts->squash_onto);
 	} else {
+		int i;
+
 		/* Determine the length of the label */
 		for (i = 0; i < len; i++)
 			if (isspace(name[i]))
-				len = i;
+				break;
+		len = i;
 
 		strbuf_addf(&ref_name, "refs/rewritten/%.*s", len, name);
 		if (get_oid(ref_name.buf, &oid) &&
@@ -2906,6 +3024,26 @@ static int do_reset(const char *name, int len, struct replay_opts *opts)
 	return ret;
 }
 
+static struct commit *lookup_label(const char *label, int len,
+				   struct strbuf *buf)
+{
+	struct commit *commit;
+
+	strbuf_reset(buf);
+	strbuf_addf(buf, "refs/rewritten/%.*s", len, label);
+	commit = lookup_commit_reference_by_name(buf->buf);
+	if (!commit) {
+		/* fall back to non-rewritten ref or commit */
+		strbuf_splice(buf, 0, strlen("refs/rewritten/"), "", 0);
+		commit = lookup_commit_reference_by_name(buf->buf);
+	}
+
+	if (!commit)
+		error(_("could not resolve '%s'"), buf->buf);
+
+	return commit;
+}
+
 static int do_merge(struct commit *commit, const char *arg, int arg_len,
 		    int flags, struct replay_opts *opts)
 {
@@ -2914,8 +3052,9 @@ static int do_merge(struct commit *commit, const char *arg, int arg_len,
 	struct strbuf ref_name = STRBUF_INIT;
 	struct commit *head_commit, *merge_commit, *i;
 	struct commit_list *bases, *j, *reversed = NULL;
+	struct commit_list *to_merge = NULL, **tail = &to_merge;
 	struct merge_options o;
-	int merge_arg_len, oneline_offset, can_fast_forward, ret;
+	int merge_arg_len, oneline_offset, can_fast_forward, ret, k;
 	static struct lock_file lock;
 	const char *p;
 
@@ -2930,38 +3069,51 @@ static int do_merge(struct commit *commit, const char *arg, int arg_len,
 		goto leave_merge;
 	}
 
-	oneline_offset = arg_len;
-	merge_arg_len = strcspn(arg, " \t\n");
-	p = arg + merge_arg_len;
-	p += strspn(p, " \t\n");
-	if (*p == '#' && (!p[1] || isspace(p[1]))) {
-		p += 1 + strspn(p + 1, " \t\n");
-		oneline_offset = p - arg;
-	} else if (p - arg < arg_len)
-		BUG("octopus merges are not supported yet: '%s'", p);
-
-	strbuf_addf(&ref_name, "refs/rewritten/%.*s", merge_arg_len, arg);
-	merge_commit = lookup_commit_reference_by_name(ref_name.buf);
-	if (!merge_commit) {
-		/* fall back to non-rewritten ref or commit */
-		strbuf_splice(&ref_name, 0, strlen("refs/rewritten/"), "", 0);
-		merge_commit = lookup_commit_reference_by_name(ref_name.buf);
+	/*
+	 * For octopus merges, the arg starts with the list of revisions to be
+	 * merged. The list is optionally followed by '#' and the oneline.
+	 */
+	merge_arg_len = oneline_offset = arg_len;
+	for (p = arg; p - arg < arg_len; p += strspn(p, " \t\n")) {
+		if (!*p)
+			break;
+		if (*p == '#' && (!p[1] || isspace(p[1]))) {
+			p += 1 + strspn(p + 1, " \t\n");
+			oneline_offset = p - arg;
+			break;
+		}
+		k = strcspn(p, " \t\n");
+		if (!k)
+			continue;
+		merge_commit = lookup_label(p, k, &ref_name);
+		if (!merge_commit) {
+			ret = error(_("unable to parse '%.*s'"), k, p);
+			goto leave_merge;
+		}
+		tail = &commit_list_insert(merge_commit, tail)->next;
+		p += k;
+		merge_arg_len = p - arg;
 	}
 
-	if (!merge_commit) {
-		ret = error(_("could not resolve '%s'"), ref_name.buf);
+	if (!to_merge) {
+		ret = error(_("nothing to merge: '%.*s'"), arg_len, arg);
 		goto leave_merge;
 	}
 
 	if (opts->have_squash_onto &&
-	    !oidcmp(&head_commit->object.oid, &opts->squash_onto)) {
+	    oideq(&head_commit->object.oid, &opts->squash_onto)) {
 		/*
 		 * When the user tells us to "merge" something into a
 		 * "[new root]", let's simply fast-forward to the merge head.
 		 */
 		rollback_lock_file(&lock);
-		ret = fast_forward_to(&merge_commit->object.oid,
-				       &head_commit->object.oid, 0, opts);
+		if (to_merge->next)
+			ret = error(_("octopus merge cannot be executed on "
+				      "top of a [new root]"));
+		else
+			ret = fast_forward_to(&to_merge->item->object.oid,
+					      &head_commit->object.oid, 0,
+					      opts);
 		goto leave_merge;
 	}
 
@@ -2997,7 +3149,8 @@ static int do_merge(struct commit *commit, const char *arg, int arg_len,
 			p = arg + oneline_offset;
 			len = arg_len - oneline_offset;
 		} else {
-			strbuf_addf(&buf, "Merge branch '%.*s'",
+			strbuf_addf(&buf, "Merge %s '%.*s'",
+				    to_merge->next ? "branches" : "branch",
 				    merge_arg_len, arg);
 			p = buf.buf;
 			len = buf.len;
@@ -3017,39 +3170,87 @@ static int do_merge(struct commit *commit, const char *arg, int arg_len,
 	 * commit, we cannot fast-forward.
 	 */
 	can_fast_forward = opts->allow_ff && commit && commit->parents &&
-		!oidcmp(&commit->parents->item->object.oid,
-			&head_commit->object.oid);
+		oideq(&commit->parents->item->object.oid,
+		      &head_commit->object.oid);
 
 	/*
-	 * If the merge head is different from the original one, we cannot
+	 * If any merge head is different from the original one, we cannot
 	 * fast-forward.
 	 */
 	if (can_fast_forward) {
-		struct commit_list *second_parent = commit->parents->next;
+		struct commit_list *p = commit->parents->next;
 
-		if (second_parent && !second_parent->next &&
-		    oidcmp(&merge_commit->object.oid,
-			   &second_parent->item->object.oid))
+		for (j = to_merge; j && p; j = j->next, p = p->next)
+			if (!oideq(&j->item->object.oid,
+				   &p->item->object.oid)) {
+				can_fast_forward = 0;
+				break;
+			}
+		/*
+		 * If the number of merge heads differs from the original merge
+		 * commit, we cannot fast-forward.
+		 */
+		if (j || p)
 			can_fast_forward = 0;
 	}
 
-	if (can_fast_forward && commit->parents->next &&
-	    !commit->parents->next->next &&
-	    !oidcmp(&commit->parents->next->item->object.oid,
-		    &merge_commit->object.oid)) {
+	if (can_fast_forward) {
 		rollback_lock_file(&lock);
 		ret = fast_forward_to(&commit->object.oid,
 				      &head_commit->object.oid, 0, opts);
 		goto leave_merge;
 	}
 
+	if (to_merge->next) {
+		/* Octopus merge */
+		struct child_process cmd = CHILD_PROCESS_INIT;
+
+		if (read_env_script(&cmd.env_array)) {
+			const char *gpg_opt = gpg_sign_opt_quoted(opts);
+
+			ret = error(_(staged_changes_advice), gpg_opt, gpg_opt);
+			goto leave_merge;
+		}
+
+		cmd.git_cmd = 1;
+		argv_array_push(&cmd.args, "merge");
+		argv_array_push(&cmd.args, "-s");
+		argv_array_push(&cmd.args, "octopus");
+		argv_array_push(&cmd.args, "--no-edit");
+		argv_array_push(&cmd.args, "--no-ff");
+		argv_array_push(&cmd.args, "--no-log");
+		argv_array_push(&cmd.args, "--no-stat");
+		argv_array_push(&cmd.args, "-F");
+		argv_array_push(&cmd.args, git_path_merge_msg(the_repository));
+		if (opts->gpg_sign)
+			argv_array_push(&cmd.args, opts->gpg_sign);
+
+		/* Add the tips to be merged */
+		for (j = to_merge; j; j = j->next)
+			argv_array_push(&cmd.args,
+					oid_to_hex(&j->item->object.oid));
+
+		strbuf_release(&ref_name);
+		unlink(git_path_cherry_pick_head(the_repository));
+		rollback_lock_file(&lock);
+
+		rollback_lock_file(&lock);
+		ret = run_command(&cmd);
+
+		/* force re-reading of the cache */
+		if (!ret && (discard_cache() < 0 || read_cache() < 0))
+			ret = error(_("could not read index"));
+		goto leave_merge;
+	}
+
+	merge_commit = to_merge->item;
 	write_message(oid_to_hex(&merge_commit->object.oid), GIT_SHA1_HEXSZ,
 		      git_path_merge_head(the_repository), 0);
 	write_message("no-ff", 5, git_path_merge_mode(the_repository), 0);
 
 	bases = get_merge_bases(head_commit, merge_commit);
-	if (bases && !oidcmp(&merge_commit->object.oid,
-			     &bases->item->object.oid)) {
+	if (bases && oideq(&merge_commit->object.oid,
+			   &bases->item->object.oid)) {
 		ret = 0;
 		/* skip merging an ancestor of HEAD */
 		goto leave_merge;
@@ -3092,7 +3293,7 @@ static int do_merge(struct commit *commit, const char *arg, int arg_len,
 
 	rollback_lock_file(&lock);
 	if (ret)
-		rerere(opts->allow_rerere_auto);
+		repo_rerere(the_repository, opts->allow_rerere_auto);
 	else
 		/*
 		 * In case of problems, we now want to return a positive
@@ -3105,6 +3306,7 @@ static int do_merge(struct commit *commit, const char *arg, int arg_len,
 leave_merge:
 	strbuf_release(&ref_name);
 	rollback_lock_file(&lock);
+	free_commit_list(to_merge);
 	return ret;
 }
 
@@ -3247,6 +3449,24 @@ static int checkout_onto(struct replay_opts *opts,
 	return update_ref(NULL, "ORIG_HEAD", &oid, NULL, 0, UPDATE_REFS_MSG_ON_ERR);
 }
 
+static int stopped_at_head(void)
+{
+	struct object_id head;
+	struct commit *commit;
+	struct commit_message message;
+
+	if (get_oid("HEAD", &head) ||
+	    !(commit = lookup_commit(the_repository, &head)) ||
+	    parse_commit(commit) || get_message(commit, &message))
+		fprintf(stderr, _("Stopped at HEAD\n"));
+	else {
+		fprintf(stderr, _("Stopped at %s\n"), message.label);
+		free_message(commit, &message);
+	}
+	return 0;
+
+}
+
 static const char rescheduled_advice[] =
 N_("Could not execute the todo command\n"
 "\n"
@@ -3293,6 +3513,9 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts)
 			unlink(rebase_path_stopped_sha());
 			unlink(rebase_path_amend());
 			delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
+
+			if (item->command == TODO_BREAK)
+				return stopped_at_head();
 		}
 		if (item->command <= TODO_SQUASH) {
 			if (is_rebase_i(opts))
@@ -3343,9 +3566,9 @@ static int pick_commits(struct todo_list *todo_list, struct replay_opts *opts)
 				 */
 				if (item->command == TODO_REWORD &&
 				    !get_oid("HEAD", &oid) &&
-				    (!oidcmp(&item->commit->object.oid, &oid) ||
+				    (oideq(&item->commit->object.oid, &oid) ||
 				     (opts->have_squash_onto &&
-				      !oidcmp(&opts->squash_onto, &oid))))
+				      oideq(&opts->squash_onto, &oid))))
 					to_amend = 1;
 
 				return res | error_with_patch(item->commit,
@@ -3471,7 +3694,7 @@ cleanup_head_ref:
 			struct object_id orig, head;
 
 			memset(&log_tree_opt, 0, sizeof(log_tree_opt));
-			init_revisions(&log_tree_opt, NULL);
+			repo_init_revisions(the_repository, &log_tree_opt, NULL);
 			log_tree_opt.diff = 1;
 			log_tree_opt.diffopt.output_format =
 				DIFF_FORMAT_DIFFSTAT;
@@ -3560,7 +3783,7 @@ static int commit_staged_changes(struct replay_opts *opts,
 		if (get_oid_hex(rev.buf, &to_amend))
 			return error(_("invalid contents: '%s'"),
 				rebase_path_amend());
-		if (!is_clean && oidcmp(&head, &to_amend))
+		if (!is_clean && !oideq(&head, &to_amend))
 			return error(_("\nYou have uncommitted changes in your "
 				       "working tree. Please, commit them\n"
 				       "first and then run 'git rebase "
@@ -3572,9 +3795,20 @@ static int commit_staged_changes(struct replay_opts *opts,
 		 * the commit message and if there was a squash, let the user
 		 * edit it.
 		 */
-		if (is_clean && !oidcmp(&head, &to_amend) &&
-		    opts->current_fixup_count > 0 &&
-		    file_exists(rebase_path_stopped_sha())) {
+		if (!is_clean || !opts->current_fixup_count)
+			; /* this is not the final fixup */
+		else if (!oideq(&head, &to_amend) ||
+			 !file_exists(rebase_path_stopped_sha())) {
+			/* was a final fixup or squash done manually? */
+			if (!is_fixup(peek_command(todo_list, 0))) {
+				unlink(rebase_path_fixup_msg());
+				unlink(rebase_path_squash_msg());
+				unlink(rebase_path_current_fixups());
+				strbuf_reset(&opts->current_fixups);
+				opts->current_fixup_count = 0;
+			}
+		} else {
+			/* we are in a fixup/squash chain */
 			const char *p = opts->current_fixups.buf;
 			int len = opts->current_fixups.len;
 
@@ -3739,7 +3973,7 @@ int sequencer_pick_revisions(struct replay_opts *opts)
 			continue;
 
 		if (!get_oid(name, &oid)) {
-			if (!lookup_commit_reference_gently(&oid, 1)) {
+			if (!lookup_commit_reference_gently(the_repository, &oid, 1)) {
 				enum object_type type = oid_object_info(the_repository,
 									&oid,
 									NULL);
@@ -3765,8 +3999,10 @@ int sequencer_pick_revisions(struct replay_opts *opts)
 		if (prepare_revision_walk(opts->revs))
 			return error(_("revision walk setup failed"));
 		cmit = get_revision(opts->revs);
-		if (!cmit || get_revision(opts->revs))
-			return error("BUG: expected exactly one commit from walk");
+		if (!cmit)
+			return error(_("empty commit set passed"));
+		if (get_revision(opts->revs))
+			BUG("unexpected extra commit from walk");
 		return single_pick(cmit, opts);
 	}
 
@@ -3791,7 +4027,7 @@ int sequencer_pick_revisions(struct replay_opts *opts)
 	return res;
 }
 
-void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag)
+void append_signoff(struct strbuf *msgbuf, size_t ignore_footer, unsigned flag)
 {
 	unsigned no_dup_sob = flag & APPEND_SIGNOFF_DEDUP;
 	struct strbuf sob = STRBUF_INIT;
@@ -4008,7 +4244,6 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 	 */
 	while ((commit = get_revision(revs))) {
 		struct commit_list *to_merge;
-		int is_octopus;
 		const char *p1, *p2;
 		struct object_id *oid;
 		int is_empty;
@@ -4040,11 +4275,6 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 			continue;
 		}
 
-		is_octopus = to_merge && to_merge->next;
-
-		if (is_octopus)
-			BUG("Octopus merges not yet supported");
-
 		/* Create a label */
 		strbuf_reset(&label);
 		if (skip_prefix(oneline.buf, "Merge ", &p1) &&
@@ -4066,13 +4296,17 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 		strbuf_addf(&buf, "%s -C %s",
 			    cmd_merge, oid_to_hex(&commit->object.oid));
 
-		/* label the tip of merged branch */
-		oid = &to_merge->item->object.oid;
-		strbuf_addch(&buf, ' ');
+		/* label the tips of merged branches */
+		for (; to_merge; to_merge = to_merge->next) {
+			oid = &to_merge->item->object.oid;
+			strbuf_addch(&buf, ' ');
+
+			if (!oidset_contains(&interesting, oid)) {
+				strbuf_addstr(&buf, label_oid(oid, NULL,
+							      &state));
+				continue;
+			}
 
-		if (!oidset_contains(&interesting, oid))
-			strbuf_addstr(&buf, label_oid(oid, NULL, &state));
-		else {
 			tips_tail = &commit_list_insert(to_merge->item,
 							tips_tail)->next;
 
@@ -4096,9 +4330,7 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 			struct object_id *oid = &parent->item->object.oid;
 			if (!oidset_contains(&interesting, oid))
 				continue;
-			if (!oidset_contains(&child_seen, oid))
-				oidset_insert(&child_seen, oid);
-			else
+			if (oidset_insert(&child_seen, oid))
 				label_oid(oid, "branch-point", &state);
 		}
 
@@ -4125,7 +4357,7 @@ static int make_script_with_merges(struct pretty_print_context *pp,
 		entry = oidmap_get(&state.commit2label, &commit->object.oid);
 
 		if (entry)
-			fprintf(out, "\n# Branch %s\n", entry->string);
+			fprintf(out, "\n%c Branch %s\n", comment_line_char, entry->string);
 		else
 			fprintf(out, "\n");
 
@@ -4206,7 +4438,7 @@ int sequencer_make_script(FILE *out, int argc, const char **argv,
 	const char *insn = flags & TODO_LIST_ABBREVIATE_CMDS ? "p" : "pick";
 	int rebase_merges = flags & TODO_LIST_REBASE_MERGES;
 
-	init_revisions(&revs, NULL);
+	repo_init_revisions(the_repository, &revs, NULL);
 	revs.verbose_header = 1;
 	if (!rebase_merges)
 		revs.max_parents = 1;
@@ -4263,10 +4495,9 @@ int sequencer_add_exec_commands(const char *commands)
 {
 	const char *todo_file = rebase_path_todo();
 	struct todo_list todo_list = TODO_LIST_INIT;
-	struct todo_item *item;
 	struct strbuf *buf = &todo_list.buf;
 	size_t offset = 0, commands_len = strlen(commands);
-	int i, first;
+	int i, insert;
 
 	if (strbuf_read_file(&todo_list.buf, todo_file, 0) < 0)
 		return error(_("could not read '%s'."), todo_file);
@@ -4276,19 +4507,40 @@ int sequencer_add_exec_commands(const char *commands)
 		return error(_("unusable todo list: '%s'"), todo_file);
 	}
 
-	first = 1;
-	/* insert <commands> before every pick except the first one */
-	for (item = todo_list.items, i = 0; i < todo_list.nr; i++, item++) {
-		if (item->command == TODO_PICK && !first) {
-			strbuf_insert(buf, item->offset_in_buf + offset,
-				      commands, commands_len);
+	/*
+	 * Insert <commands> after every pick. Here, fixup/squash chains
+	 * are considered part of the pick, so we insert the commands *after*
+	 * those chains if there are any.
+	 */
+	insert = -1;
+	for (i = 0; i < todo_list.nr; i++) {
+		enum todo_command command = todo_list.items[i].command;
+
+		if (insert >= 0) {
+			/* skip fixup/squash chains */
+			if (command == TODO_COMMENT)
+				continue;
+			else if (is_fixup(command)) {
+				insert = i + 1;
+				continue;
+			}
+			strbuf_insert(buf,
+				      todo_list.items[insert].offset_in_buf +
+				      offset, commands, commands_len);
 			offset += commands_len;
+			insert = -1;
 		}
-		first = 0;
+
+		if (command == TODO_PICK || command == TODO_MERGE)
+			insert = i + 1;
 	}
 
-	/* append final <commands> */
-	strbuf_add(buf, commands, commands_len);
+	/* insert or append final <commands> */
+	if (insert >= 0 && insert < todo_list.nr)
+		strbuf_insert(buf, todo_list.items[insert].offset_in_buf +
+			      offset, commands, commands_len);
+	else if (insert >= 0 || !offset)
+		strbuf_add(buf, commands, commands_len);
 
 	i = write_message(buf->buf, buf->len, todo_file, 0);
 	todo_list_release(&todo_list);
@@ -4515,7 +4767,7 @@ static int skip_unnecessary_picks(struct object_id *output_oid)
 		if (item->commit->parents->next)
 			break; /* merge commit */
 		parent_oid = &item->commit->parents->item->object.oid;
-		if (hashcmp(parent_oid->hash, output_oid->hash))
+		if (!oideq(parent_oid, output_oid))
 			break;
 		oidcpy(output_oid, &item->commit->object.oid);
 	}