receive-pack: factor out queueing of command

Make a helper function to accept a line of a protocol message and
queue an update command out of the code from read_head_info().

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index c9b92bffda22c1b5340c0a61a50f894d8e9dad5b..587f7da5594f4c552206ec41d484c49efea48e84 100644 (file)
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -831,16 +831,40 @@ static void execute_commands(struct command *commands,
                      "the reported refs above");
 }
 
+static struct command **queue_command(struct command **tail,
+                                     const char *line,
+                                     int linelen)
+{
+       unsigned char old_sha1[20], new_sha1[20];
+       struct command *cmd;
+       const char *refname;
+       int reflen;
+
+       if (linelen < 83 ||
+           line[40] != ' ' ||
+           line[81] != ' ' ||
+           get_sha1_hex(line, old_sha1) ||
+           get_sha1_hex(line + 41, new_sha1))
+               die("protocol error: expected old/new/ref, got '%s'", line);
+
+       refname = line + 82;
+       reflen = linelen - 82;
+       cmd = xcalloc(1, sizeof(struct command) + reflen + 1);
+       hashcpy(cmd->old_sha1, old_sha1);
+       hashcpy(cmd->new_sha1, new_sha1);
+       memcpy(cmd->ref_name, refname, reflen);
+       cmd->ref_name[reflen] = '\0';
+       *tail = cmd;
+       return &cmd->next;
+}
+
 static struct command *read_head_info(struct sha1_array *shallow)
 {
        struct command *commands = NULL;
        struct command **p = &commands;
        for (;;) {
                char *line;
-               unsigned char old_sha1[20], new_sha1[20];
-               struct command *cmd;
-               char *refname;
-               int len, reflen, linelen;
+               int len, linelen;
 
                line = packet_read_line(0, &len);
                if (!line)
@@ -866,23 +890,7 @@ static struct command *read_head_info(struct sha1_array *shallow)
                                quiet = 1;
                }
 
-               if (linelen < 83 ||
-                   line[40] != ' ' ||
-                   line[81] != ' ' ||
-                   get_sha1_hex(line, old_sha1) ||
-                   get_sha1_hex(line + 41, new_sha1))
-                       die("protocol error: expected old/new/ref, got '%s'",
-                           line);
-
-               refname = line + 82;
-               reflen = linelen - 82;
-               cmd = xcalloc(1, sizeof(struct command) + reflen + 1);
-               hashcpy(cmd->old_sha1, old_sha1);
-               hashcpy(cmd->new_sha1, new_sha1);
-               memcpy(cmd->ref_name, refname, reflen);
-               cmd->ref_name[reflen] = '\0';
-               *p = cmd;
-               p = &cmd->next;
+               p = queue_command(p, line, linelen);
        }
        return commands;
 }