git-receive-pack: start parsing ref update commands

We don't act on them yet, but we parse them.

diff --git a/receive-pack.c b/receive-pack.c
index ce0b3c5..fb43107 100644 (file)
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -86,12 +86,14 @@ static void write_head_info(const char *base, int nr, char **match)
        }
 }
 
-struct line {
-       struct line *next;
-       char data[0];
+struct command {
+       struct command *next;
+       unsigned char old_sha1[20];
+       unsigned char new_sha1[20];
+       char ref_name[0];
 };
 
-struct line *commands = NULL;
+struct command *commands = NULL;
 
 /*
  * This gets called after(if) we've successfully
@@ -99,28 +101,44 @@ struct line *commands = NULL;
  */
 static void execute_commands(void)
 {
-       struct line *line = commands;
-
-       while (line) {
-               fprintf(stderr, "%s", line->data);
-               line = line->next;
+       struct command *cmd = commands;
+
+       while (cmd) {
+               char old_hex[60], *new_hex;
+               strcpy(old_hex, sha1_to_hex(cmd->old_sha1));
+               new_hex = sha1_to_hex(cmd->new_sha1);
+               fprintf(stderr, "%s: %s -> %s\n", cmd->ref_name, old_hex, new_hex);
+               cmd = cmd->next;
        }
 }
 
 static void read_head_info(void)
 {
-       struct line **p = &commands;
+       struct command **p = &commands;
        for (;;) {
                static char line[1000];
-               int len = packet_read_line(0, line, sizeof(line));
-               struct line *n;
+               unsigned char old_sha1[20], new_sha1[20];
+               struct command *cmd;
+               int len;
+
+               len = packet_read_line(0, line, sizeof(line));
                if (!len)
                        break;
-               n = xmalloc(sizeof(struct line) + len);
-               n->next = NULL;
-               memcpy(n->data, line + 4, len - 3);
-               *p = n;
-               p = &n->next;
+               if (line[len-1] == '\n')
+                       line[--len] = 0;
+               if (len < 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);
+               cmd = xmalloc(sizeof(struct command) + len - 80);
+               memcpy(cmd->old_sha1, old_sha1, 20);
+               memcpy(cmd->new_sha1, new_sha1, 20);
+               memcpy(cmd->ref_name, line + 82, len - 81);
+               cmd->next = NULL;
+               *p = cmd;
+               p = &cmd->next;
        }
 }