The command line arguments given to "git push" are massaged into
a list of refspecs in set_refspecs() function. This was implemented
using xmalloc, strcpy and friends, but it is much easier to read if
done using strbuf.

Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
 builtin/push.c | 35 ++++++++++++++---------------------
 1 file changed, 14 insertions(+), 21 deletions(-)

diff --git a/builtin/push.c b/builtin/push.c
index 7b1b66c..76e4400 100644
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -41,29 +41,22 @@ static void set_refspecs(const char **refs, int nr)
        for (i = 0; i < nr; i++) {
                const char *ref = refs[i];
                if (!strcmp("tag", ref)) {
-                       char *tag;
-                       int len;
+                       struct strbuf tagref = STRBUF_INIT;
                        if (nr <= ++i)
                                die(_("tag shorthand without <tag>"));
-                       len = strlen(refs[i]) + 11;
-                       if (deleterefs) {
-                               tag = xmalloc(len+1);
-                               strcpy(tag, ":refs/tags/");
-                       } else {
-                               tag = xmalloc(len);
-                               strcpy(tag, "refs/tags/");
-                       }
-                       strcat(tag, refs[i]);
-                       ref = tag;
-               } else if (deleterefs && !strchr(ref, ':')) {
-                       char *delref;
-                       int len = strlen(ref)+1;
-                       delref = xmalloc(len+1);
-                       strcpy(delref, ":");
-                       strcat(delref, ref);
-                       ref = delref;
-               } else if (deleterefs)
-                       die(_("--delete only accepts plain target ref names"));
+                       ref = refs[i];
+                       if (deleterefs)
+                               strbuf_addf(&tagref, ":refs/tags/%s", ref);
+                       else
+                               strbuf_addf(&tagref, "refs/tags/%s", ref);
+                       ref = strbuf_detach(&tagref, NULL);
+               } else if (deleterefs) {
+                       struct strbuf delref = STRBUF_INIT;
+                       if (strchr(ref, ':'))
+                               die(_("--delete only accepts plain target ref 
names"));
+                       strbuf_addf(&delref, ":%s", ref);
+                       ref = strbuf_detach(&delref, NULL);
+               }
                add_refspec(ref);
        }
 }
-- 
1.8.5.1-402-gdd8f092

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