help.c: add a compatibility comment to cmd_version()

External projects have been known to parse the output of "git version". Help prevent future authors from changing its format by adding a comment to its implementation. Signed-off-by: David Aguilar <davvid@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

David Aguilar committed Apr 16, 2013 at 13:33 UTC f2de0b97935da2ba3ccb627457e5fa3fc4e11287
1 file changed +4
help.c
+4
@@ -397,6 +397,10 @@ const char *help_unknown_cmd(const char *cmd)
397
398 int cmd_version(int argc, const char **argv, const char *prefix)
399 {
400 + /*
401 + * The format of this string should be kept stable for compatibility
402 + * with external projects that rely on the output of "git version".
403 + */
404 printf("git version %s\n", git_version_string);
405 return 0;
406 }