Merge branch 'jk/gcc-function-attributes'
[git/git.git] / transport-helper.c
index 111336a..45a35df 100644 (file)
@@ -11,6 +11,7 @@
 #include "thread-utils.h"
 #include "sigchain.h"
 #include "argv-array.h"
+#include "refs.h"
 
 static int debug;
 
@@ -47,7 +48,7 @@ static void sendline(struct helper_data *helper, struct strbuf *buffer)
                die_errno("Full write to remote helper failed");
 }
 
-static int recvline_fh(FILE *helper, struct strbuf *buffer)
+static int recvline_fh(FILE *helper, struct strbuf *buffer, const char *name)
 {
        strbuf_reset(buffer);
        if (debug)
@@ -65,7 +66,7 @@ static int recvline_fh(FILE *helper, struct strbuf *buffer)
 
 static int recvline(struct helper_data *helper, struct strbuf *buffer)
 {
-       return recvline_fh(helper->out, buffer);
+       return recvline_fh(helper->out, buffer, helper->name);
 }
 
 static void xchgline(struct helper_data *helper, struct strbuf *buffer)
@@ -217,6 +218,8 @@ static struct child_process *get_helper(struct transport *transport)
                for (i = 0; i < refspec_nr; i++)
                        free((char *)refspecs[i]);
                free(refspecs);
+       } else if (data->import || data->bidi_import || data->export) {
+               warning("This remote helper should implement refspec capability.");
        }
        strbuf_release(&buf);
        if (debug)
@@ -473,7 +476,7 @@ static int fetch_with_import(struct transport *transport,
         * were fetching.
         *
         * (If no "refspec" capability was specified, for historical
-        * reasons we default to *:*.)
+        * reasons we default to the equivalent of *:*.)
         *
         * Store the result in to_fetch[i].old_sha1.  Callers such
         * as "git fetch" can use the value to write feedback to the
@@ -540,7 +543,7 @@ static int process_connect_service(struct transport *transport,
                goto exit;
 
        sendline(data, &cmdbuf);
-       recvline_fh(input, &cmdbuf);
+       recvline_fh(input, &cmdbuf, name);
        if (!strcmp(cmdbuf.buf, "")) {
                data->no_disconnect_req = 1;
                if (debug)
@@ -622,7 +625,7 @@ static int fetch(struct transport *transport,
        return -1;
 }
 
-static void push_update_ref_status(struct strbuf *buf,
+static int push_update_ref_status(struct strbuf *buf,
                                   struct ref **ref,
                                   struct ref *remote_refs)
 {
@@ -688,7 +691,7 @@ static void push_update_ref_status(struct strbuf *buf,
                *ref = find_ref_by_name(remote_refs, refname);
        if (!*ref) {
                warning("helper reported unexpected status of %s", refname);
-               return;
+               return 1;
        }
 
        if ((*ref)->status != REF_STATUS_NONE) {
@@ -697,11 +700,12 @@ static void push_update_ref_status(struct strbuf *buf,
                 * status reported by the remote helper if the latter is 'no match'.
                 */
                if (status == REF_STATUS_NONE)
-                       return;
+                       return 1;
        }
 
        (*ref)->status = status;
        (*ref)->remote_status = msg;
+       return !(status == REF_STATUS_OK);
 }
 
 static void push_update_refs_status(struct helper_data *data,
@@ -710,11 +714,24 @@ static void push_update_refs_status(struct helper_data *data,
        struct strbuf buf = STRBUF_INIT;
        struct ref *ref = remote_refs;
        for (;;) {
+               char *private;
+
                recvline(data, &buf);
                if (!buf.len)
                        break;
 
-               push_update_ref_status(&buf, &ref, remote_refs);
+               if (push_update_ref_status(&buf, &ref, remote_refs))
+                       continue;
+
+               if (!data->refspecs)
+                       continue;
+
+               /* propagate back the update to the remote namespace */
+               private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name);
+               if (!private)
+                       continue;
+               update_ref("update by helper", private, ref->new_sha1, NULL, 0, 0);
+               free(private);
        }
        strbuf_release(&buf);
 }
@@ -789,6 +806,14 @@ static int push_refs_with_export(struct transport *transport,
        struct string_list revlist_args = STRING_LIST_INIT_NODUP;
        struct strbuf buf = STRBUF_INIT;
 
+       if (!data->refspecs)
+               die("remote-helper doesn't support push; refspec needed");
+
+       if (flags & TRANSPORT_PUSH_DRY_RUN) {
+               if (set_helper_option(transport, "dry-run", "true") != 0)
+                       die("helper %s does not support dry-run", data->name);
+       }
+
        helper = get_helper(transport);
 
        write_constant(helper->in, "export\n");
@@ -799,8 +824,9 @@ static int push_refs_with_export(struct transport *transport,
                char *private;
                unsigned char sha1[20];
 
-               if (!data->refspecs)
-                       continue;
+               if (ref->deletion)
+                       die("remote-helpers do not support ref deletion");
+
                private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name);
                if (private && !get_sha1(private, sha1)) {
                        strbuf_addf(&buf, "^%s", private);
@@ -809,13 +835,14 @@ static int push_refs_with_export(struct transport *transport,
                }
                free(private);
 
-               if (ref->deletion) {
+               if (ref->deletion)
                        die("remote-helpers do not support ref deletion");
-               }
 
-               if (ref->peer_ref)
+               if (ref->peer_ref) {
+                       if (strcmp(ref->peer_ref->name, ref->name))
+                               die("remote-helpers do not support old:new syntax");
                        string_list_append(&revlist_args, ref->peer_ref->name);
-
+               }
        }
 
        if (get_exporter(transport, &exporter, &revlist_args))