Merge branch 'em/checkout-orphan'

[git.git] / builtin / checkout.c

diff --git a/builtin/checkout.c b/builtin/checkout.c
index 88b1f43e05e64f0e8dcd6dd0461bbebd6fab1e25..c3825219c1efbd4939af6d18bcad6efcfa74f406 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -33,6 +33,7 @@ struct checkout_opts {
        int writeout_error;
 
        const char *new_branch;
+       const char *new_orphan_branch;
        int new_branch_log;
        enum branch_track track;
 };
@@ -492,8 +493,9 @@ static void update_refs_for_switch(struct checkout_opts *opts,
        struct strbuf msg = STRBUF_INIT;
        const char *old_desc;
        if (opts->new_branch) {
-               create_branch(old->name, opts->new_branch, new->name, 0,
-                             opts->new_branch_log, opts->track);
+               if (!opts->new_orphan_branch)
+                       create_branch(old->name, opts->new_branch, new->name, 0,
+                                     opts->new_branch_log, opts->track);
                new->name = opts->new_branch;
                setup_branch_path(new);
        }
@@ -633,6 +635,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
                OPT_BOOLEAN('l', NULL, &opts.new_branch_log, "log for new branch"),
                OPT_SET_INT('t', "track",  &opts.track, "track",
                        BRANCH_TRACK_EXPLICIT),
+               OPT_STRING(0, "orphan", &opts.new_orphan_branch, "new branch", "new unparented branch"),
                OPT_SET_INT('2', "ours", &opts.writeout_stage, "stage",
                            2),
                OPT_SET_INT('3', "theirs", &opts.writeout_stage, "stage",
@@ -678,6 +681,14 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
                opts.new_branch = argv0 + 1;
        }
 
+       if (opts.new_orphan_branch) {
+               if (opts.new_branch)
+                       die("--orphan and -b are mutually exclusive");
+               if (opts.track > 0 || opts.new_branch_log)
+                       die("--orphan cannot be used with -t or -l");
+               opts.new_branch = opts.new_orphan_branch;
+       }
+
        if (conflict_style) {
                opts.merge = 1; /* implied */
                git_xmerge_config("merge.conflictstyle", conflict_style, NULL);