reset.c: extract function for updating {ORIG_,}HEAD

By extracting the code for updating the HEAD and ORIG_HEAD symbolic
references to a separate function, we declutter cmd_reset() a bit and
we make it clear that e.g. the four variables {,sha1_}{,old_}orig are
only used by this code.

Signed-off-by: Martin von Zweigbergk <martinvonz@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/reset.c b/builtin/reset.c
index d89cf4d113bbb5cb419fd83e519e8fc493ef1dcb..2187d6453de091a17179bed0ba2a0d58d9c90512 100644 (file)
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -240,16 +240,35 @@ static const char **parse_args(const char **argv, const char *prefix, const char
        return argv[0] ? get_pathspec(prefix, argv) : NULL;
 }
 
+static int update_refs(const char *rev, const unsigned char *sha1)
+{
+       int update_ref_status;
+       struct strbuf msg = STRBUF_INIT;
+       unsigned char *orig = NULL, sha1_orig[20],
+               *old_orig = NULL, sha1_old_orig[20];
+
+       if (!get_sha1("ORIG_HEAD", sha1_old_orig))
+               old_orig = sha1_old_orig;
+       if (!get_sha1("HEAD", sha1_orig)) {
+               orig = sha1_orig;
+               set_reflog_message(&msg, "updating ORIG_HEAD", NULL);
+               update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR);
+       } else if (old_orig)
+               delete_ref("ORIG_HEAD", old_orig, 0);
+       set_reflog_message(&msg, "updating HEAD", rev);
+       update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, MSG_ON_ERR);
+       strbuf_release(&msg);
+       return update_ref_status;
+}
+
 int cmd_reset(int argc, const char **argv, const char *prefix)
 {
        int reset_type = NONE, update_ref_status = 0, quiet = 0;
        int patch_mode = 0;
        const char *rev;
-       unsigned char sha1[20], *orig = NULL, sha1_orig[20],
-                               *old_orig = NULL, sha1_old_orig[20];
+       unsigned char sha1[20];
        const char **pathspec = NULL;
        struct commit *commit;
-       struct strbuf msg = STRBUF_INIT;
        const struct option options[] = {
                OPT__QUIET(&quiet, N_("be quiet, only report errors")),
                OPT_SET_INT(0, "mixed", &reset_type,
@@ -333,17 +352,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 
        /* Any resets update HEAD to the head being switched to,
         * saving the previous head in ORIG_HEAD before. */
-       if (!get_sha1("ORIG_HEAD", sha1_old_orig))
-               old_orig = sha1_old_orig;
-       if (!get_sha1("HEAD", sha1_orig)) {
-               orig = sha1_orig;
-               set_reflog_message(&msg, "updating ORIG_HEAD", NULL);
-               update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0, MSG_ON_ERR);
-       }
-       else if (old_orig)
-               delete_ref("ORIG_HEAD", old_orig, 0);
-       set_reflog_message(&msg, "updating HEAD", rev);
-       update_ref_status = update_ref(msg.buf, "HEAD", sha1, orig, 0, MSG_ON_ERR);
+       update_ref_status = update_refs(rev, sha1);
 
        switch (reset_type) {
        case HARD:
@@ -360,7 +369,5 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 
        remove_branch_state();
 
-       strbuf_release(&msg);
-
        return update_ref_status;
 }