t3508: add check_head_differs_from() helper function and use it

diff --git a/tree.c b/tree.c
index d82a047e5550702bf6e1fd5a8930897124e7a96f..5ab90af256a664366f3f92b467f52634c0df3f79 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -62,6 +62,7 @@ static int match_tree_entry(const char *base, int baselen, const char *path, uns
                                continue;
                        /* pathspecs match only at the directory boundaries */
                        if (!matchlen ||
+                           baselen == matchlen ||
                            base[matchlen] == '/' ||
                            match[matchlen - 1] == '/')
                                return 1;
@@ -114,7 +115,7 @@ int read_tree_recursive(struct tree *tree,
                case 0:
                        continue;
                case READ_TREE_RECURSIVE:
-                       break;;
+                       break;
                default:
                        return -1;
                }
@@ -135,6 +136,34 @@ int read_tree_recursive(struct tree *tree,
                        if (retval)
                                return -1;
                        continue;
+               } else if (S_ISGITLINK(entry.mode)) {
+                       int retval;
+                       struct strbuf path;
+                       unsigned int entrylen;
+                       struct commit *commit;
+
+                       entrylen = tree_entry_len(entry.path, entry.sha1);
+                       strbuf_init(&path, baselen + entrylen + 1);
+                       strbuf_add(&path, base, baselen);
+                       strbuf_add(&path, entry.path, entrylen);
+                       strbuf_addch(&path, '/');
+
+                       commit = lookup_commit(entry.sha1);
+                       if (!commit)
+                               die("Commit %s in submodule path %s not found",
+                                   sha1_to_hex(entry.sha1), path.buf);
+
+                       if (parse_commit(commit))
+                               die("Invalid commit %s in submodule path %s",
+                                   sha1_to_hex(entry.sha1), path.buf);
+
+                       retval = read_tree_recursive(commit->tree,
+                                                    path.buf, path.len,
+                                                    stage, match, fn, context);
+                       strbuf_release(&path);
+                       if (retval)
+                               return -1;
+                       continue;
                }
        }
        return 0;