Use a clearer style to issue commands to remote helpers

This style is overkill for some commands, but it's worthwhile to use
the same style to issue all commands, and it's useful to avoid
open-coding string lengths.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/transport-helper.c b/transport-helper.c
index 46848777233c31b12897cf06ecf71e1718b342c1..b1ea7e6f40d94822f2e146cd9c615f607aa11d77 100644 (file)
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -37,7 +37,10 @@ static struct child_process *get_helper(struct transport *transport)
                die("Unable to run helper: git %s", helper->argv[0]);
        data->helper = helper;
 
-       write_in_full(data->helper->in, "capabilities\n", 13);
+       strbuf_addstr(&buf, "capabilities\n");
+       write_in_full(helper->in, buf.buf, buf.len);
+       strbuf_reset(&buf);
+
        file = fdopen(helper->out, "r");
        while (1) {
                if (strbuf_getline(&buf, file, '\n') == EOF)
@@ -78,11 +81,12 @@ static int fetch_with_fetch(struct transport *transport,
                const struct ref *posn = to_fetch[i];
                if (posn->status & REF_STATUS_UPTODATE)
                        continue;
-               write_in_full(helper->in, "fetch ", 6);
-               write_in_full(helper->in, sha1_to_hex(posn->old_sha1), 40);
-               write_in_full(helper->in, " ", 1);
-               write_in_full(helper->in, posn->name, strlen(posn->name));
-               write_in_full(helper->in, "\n", 1);
+
+               strbuf_addf(&buf, "fetch %s %s\n",
+                           sha1_to_hex(posn->old_sha1), posn->name);
+               write_in_full(helper->in, buf.buf, buf.len);
+               strbuf_reset(&buf);
+
                if (strbuf_getline(&buf, file, '\n') == EOF)
                        exit(128); /* child died, message supplied already */
        }
@@ -119,7 +123,10 @@ static struct ref *get_refs_list(struct transport *transport, int for_push)
        FILE *file;
 
        helper = get_helper(transport);
-       write_in_full(helper->in, "list\n", 5);
+
+       strbuf_addstr(&buf, "list\n");
+       write_in_full(helper->in, buf.buf, buf.len);
+       strbuf_reset(&buf);
 
        file = fdopen(helper->out, "r");
        while (1) {