bisect: implement "rev_argv_push" to fill an argv with revs

This patch is a minor clean up right now, but the new function
will evolve and be used more later.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/bisect.c b/bisect.c
index 12df855cfa970971ff2340a9cd0ae7a1de044e7d..f99637d9cf0f0caf4f9c99fd34e36a2a11974588 100644 (file)
--- a/bisect.c
+++ b/bisect.c
@@ -409,20 +409,23 @@ struct commit_list *find_bisection(struct commit_list *list,
        return best;
 }
 
+static void rev_argv_push(const unsigned char *sha1, const char *format)
+{
+       struct strbuf buf = STRBUF_INIT;
+
+       strbuf_addf(&buf, format, sha1_to_hex(sha1));
+       ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
+       rev_argv[rev_argv_nr++] = strbuf_detach(&buf, NULL);
+}
+
 static int register_ref(const char *refname, const unsigned char *sha1,
                        int flags, void *cb_data)
 {
        if (!strcmp(refname, "bad")) {
-               ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
                current_bad_sha1 = sha1;
-               rev_argv[rev_argv_nr++] = xstrdup(sha1_to_hex(sha1));
+               rev_argv_push(sha1, "%s");
        } else if (!prefixcmp(refname, "good-")) {
-               const char *hex = sha1_to_hex(sha1);
-               char *good = xmalloc(strlen(hex) + 2);
-               *good = '^';
-               memcpy(good + 1, hex, strlen(hex) + 1);
-               ALLOC_GROW(rev_argv, rev_argv_nr + 1, rev_argv_alloc);
-               rev_argv[rev_argv_nr++] = good;
+               rev_argv_push(sha1, "^%s");
        } else if (!prefixcmp(refname, "skip-")) {
                ALLOC_GROW(skipped_revs.sha1, skipped_revs.sha1_nr + 1,
                           skipped_revs.sha1_alloc);