[PATCH 14/18] builtin rebase: support --rebase-merges[=[no-]rebase-cousins]

[Pratik Karki]

The mode to rebase non-linear branches is now supported by the builtin
rebase, too.

Signed-off-by: Pratik Karki <predatoram...@gmail.com>
---
 builtin/rebase.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/builtin/rebase.c b/builtin/rebase.c
index dfb1e6c25b..0b94d2daaa 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -95,6 +95,7 @@ struct rebase_options {
        int autostash;
        char *cmd;
        int allow_empty_message;
+       int rebase_merges, rebase_cousins;
 };
 
 static int is_interactive(struct rebase_options *opts)
@@ -351,6 +352,10 @@ static int run_specific_rebase(struct rebase_options *opts)
        add_var(&script_snippet, "cmd", opts->cmd);
        add_var(&script_snippet, "allow_empty_message",
                opts->allow_empty_message ?  "--allow-empty-message" : "");
+       add_var(&script_snippet, "rebase_merges",
+               opts->rebase_merges ? "t" : "");
+       add_var(&script_snippet, "rebase_cousins",
+               opts->rebase_cousins ? "t" : "");
 
        switch (opts->type) {
        case REBASE_AM:
@@ -626,6 +631,7 @@ int cmd_rebase(int argc, const char **argv, const char 
*prefix)
        int opt_c = -1;
        struct string_list whitespace = STRING_LIST_INIT_NODUP;
        struct string_list exec = STRING_LIST_INIT_NODUP;
+       const char *rebase_merges = NULL;
        struct option builtin_rebase_options[] = {
                OPT_STRING(0, "onto", &options.onto_name,
                           N_("revision"),
@@ -704,6 +710,10 @@ int cmd_rebase(int argc, const char **argv, const char 
*prefix)
                OPT_BOOL(0, "allow-empty-message",
                         &options.allow_empty_message,
                         N_("allow rebasing commits with empty messages")),
+               {OPTION_STRING, 'r', "rebase-merges", &rebase_merges,
+                       N_("mode"),
+                       N_("try to rebase merges instead of skipping them"),
+                       PARSE_OPT_OPTARG, NULL, (intptr_t)""},
                OPT_END(),
        };
 
@@ -939,6 +949,17 @@ int cmd_rebase(int argc, const char **argv, const char 
*prefix)
                options.cmd = xstrdup(buf.buf);
        }
 
+       if (rebase_merges) {
+               if (!*rebase_merges)
+                       ; /* default mode; do nothing */
+               else if (!strcmp("rebase-cousins", rebase_merges))
+                       options.rebase_cousins = 1;
+               else if (strcmp("no-rebase-cousins", rebase_merges))
+                       die(_("Unknown mode: %s"), rebase_merges);
+               options.rebase_merges = 1;
+               imply_interactive(&options, "--rebase-merges");
+       }
+
        switch (options.type) {
        case REBASE_MERGE:
        case REBASE_INTERACTIVE:
-- 
2.18.0