remote-helpers: allow requesing the path to the .git directory

The 'gitdir' capability is reported by the remote helper if it
requires the location of the .git directory. The location of the .git
directory can then be used by the helper to store status files even
when the current directory is not a git repository (such as is the
case when cloning).

The location of the .git dir is specified as an absolute path.

Signed-off-by: Sverre Rabbelier <srabbelier@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/transport-helper.c b/transport-helper.c
index 2638781c5b89024294f3c4c32861b275e339ad1d..c8705b78d640e87d686fba6d35c30a18646d83f8 100644 (file)
--- a/transport-helper.c
+++ b/transport-helper.c
@@ -170,6 +170,11 @@ static struct child_process *get_helper(struct transport *transport)
                        refspecs[refspec_nr++] = strdup(buf.buf + strlen("refspec "));
                } else if (!strcmp(capname, "connect")) {
                        data->connect = 1;
+               } else if (!strcmp(buf.buf, "gitdir")) {
+                       struct strbuf gitdir = STRBUF_INIT;
+                       strbuf_addf(&gitdir, "gitdir %s\n", get_git_dir());
+                       sendline(data, &gitdir);
+                       strbuf_release(&gitdir);
                } else if (mandatory) {
                        die("Unknown mandatory capability %s. This remote "
                            "helper probably needs newer version of Git.\n",