From: Pratik Karki <predatoramigo@gmail.com>
Date: Tue, 4 Sep 2018 22:00:09 +0000 (-0700)
Subject: builtin rebase: support `fork-point` option
X-Git-Tag: v2.20.0-rc0~91^2~2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=92d0d74e8d703d0f9c0bce779d5e25bb3c25f7df;p=git

builtin rebase: support `fork-point` option

This commit adds support for `--fork-point` and `--no-fork-point`.
This is converted as-is from `git-legacy-rebase.sh`.

Signed-off-by: Pratik Karki <predatoramigo@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---

diff --git a/builtin/rebase.c b/builtin/rebase.c
index 43b46998da..04d830408b 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -632,6 +632,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	struct string_list whitespace = STRING_LIST_INIT_NODUP;
 	struct string_list exec = STRING_LIST_INIT_NODUP;
 	const char *rebase_merges = NULL;
+	int fork_point = -1;
 	struct option builtin_rebase_options[] = {
 		OPT_STRING(0, "onto", &options.onto_name,
 			   N_("revision"),
@@ -715,6 +716,8 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 			N_("mode"),
 			N_("try to rebase merges instead of skipping them"),
 			PARSE_OPT_OPTARG, NULL, (intptr_t)""},
+		OPT_BOOL(0, "fork-point", &fork_point,
+			 N_("use 'merge-base --fork-point' to refine upstream")),
 		OPT_END(),
 	};
 
@@ -1063,6 +1066,14 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
 	} else
 		BUG("unexpected number of arguments left to parse");
 
+	if (fork_point > 0) {
+		struct commit *head =
+			lookup_commit_reference(the_repository,
+						&options.orig_head);
+		options.restrict_revision =
+			get_fork_point(options.upstream_name, head);
+	}
+
 	if (read_index(the_repository->index) < 0)
 		die(_("could not read index"));