Fix .git/ discovery at the root of UNC shares

diff --git a/sha1-file.c b/sha1-file.c
index ed5c50dac427f2f3aa2b9b7b203bf2355049b163..487ea35d2d398434d2a907188d8f7ede17721fe3 100644 (file)
--- a/sha1-file.c
+++ b/sha1-file.c
@@ -743,6 +743,104 @@ char *compute_alternate_path(const char *path, struct strbuf *err)
        return ref_git;
 }
 
+static void fill_alternate_refs_command(struct child_process *cmd,
+                                       const char *repo_path)
+{
+       const char *value;
+
+       if (!git_config_get_value("core.alternateRefsCommand", &value)) {
+               cmd->use_shell = 1;
+
+               argv_array_push(&cmd->args, value);
+               argv_array_push(&cmd->args, repo_path);
+       } else {
+               cmd->git_cmd = 1;
+
+               argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path);
+               argv_array_push(&cmd->args, "for-each-ref");
+               argv_array_push(&cmd->args, "--format=%(objectname)");
+
+               if (!git_config_get_value("core.alternateRefsPrefixes", &value)) {
+                       argv_array_push(&cmd->args, "--");
+                       argv_array_split(&cmd->args, value);
+               }
+       }
+
+       cmd->env = local_repo_env;
+       cmd->out = -1;
+}
+
+static void read_alternate_refs(const char *path,
+                               alternate_ref_fn *cb,
+                               void *data)
+{
+       struct child_process cmd = CHILD_PROCESS_INIT;
+       struct strbuf line = STRBUF_INIT;
+       FILE *fh;
+
+       fill_alternate_refs_command(&cmd, path);
+
+       if (start_command(&cmd))
+               return;
+
+       fh = xfdopen(cmd.out, "r");
+       while (strbuf_getline_lf(&line, fh) != EOF) {
+               struct object_id oid;
+               const char *p;
+
+               if (parse_oid_hex(line.buf, &oid, &p) || *p) {
+                       warning(_("invalid line while parsing alternate refs: %s"),
+                               line.buf);
+                       break;
+               }
+
+               cb(&oid, data);
+       }
+
+       fclose(fh);
+       finish_command(&cmd);
+       strbuf_release(&line);
+}
+
+struct alternate_refs_data {
+       alternate_ref_fn *fn;
+       void *data;
+};
+
+static int refs_from_alternate_cb(struct object_directory *e,
+                                 void *data)
+{
+       struct strbuf path = STRBUF_INIT;
+       size_t base_len;
+       struct alternate_refs_data *cb = data;
+
+       if (!strbuf_realpath(&path, e->path, 0))
+               goto out;
+       if (!strbuf_strip_suffix(&path, "/objects"))
+               goto out;
+       base_len = path.len;
+
+       /* Is this a git repository with refs? */
+       strbuf_addstr(&path, "/refs");
+       if (!is_directory(path.buf))
+               goto out;
+       strbuf_setlen(&path, base_len);
+
+       read_alternate_refs(path.buf, cb->fn, cb->data);
+
+out:
+       strbuf_release(&path);
+       return 0;
+}
+
+void for_each_alternate_ref(alternate_ref_fn fn, void *data)
+{
+       struct alternate_refs_data cb;
+       cb.fn = fn;
+       cb.data = data;
+       foreach_alt_odb(refs_from_alternate_cb, &cb);
+}
+
 int foreach_alt_odb(alt_odb_fn fn, void *cb)
 {
        struct object_directory *ent;
@@ -1379,7 +1477,7 @@ int oid_object_info_extended(struct repository *r, const struct object_id *oid,
                /* Check if it is a missing object */
                if (fetch_if_missing && repository_format_partial_clone &&
                    !already_retried && r == the_repository &&
-                   !(flags & OBJECT_INFO_FOR_PREFETCH)) {
+                   !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) {
                        /*
                         * TODO Investigate having fetch_object() return
                         * TODO error/success and stopping the music here.
@@ -1505,7 +1603,8 @@ void *read_object_file_extended(struct repository *r,
        return NULL;
 }
 
-void *read_object_with_reference(const struct object_id *oid,
+void *read_object_with_reference(struct repository *r,
+                                const struct object_id *oid,
                                 const char *required_type_name,
                                 unsigned long *size,
                                 struct object_id *actual_oid_return)
@@ -1521,7 +1620,7 @@ void *read_object_with_reference(const struct object_id *oid,
                int ref_length = -1;
                const char *ref_type = NULL;
 
-               buffer = read_object_file(&actual_oid, &type, &isize);
+               buffer = repo_read_object_file(r, &actual_oid, &type, &isize);
                if (!buffer)
                        return NULL;
                if (type == required_type) {