Check and document the options to prevent mistakes.

diff --git a/builtin-grep.c b/builtin-grep.c
index 5fac5701e6ccebdbe83b00d2e2df19343d3aea0e..f7767bb4eeacf4d4c06ef54e6bb3f4099e96d198 100644 (file)
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -29,10 +29,11 @@ static int pathspec_matches(const char **paths, const char *name)
                int matchlen = strlen(match);
                const char *cp, *meta;
 
-               if ((matchlen <= namelen) &&
-                   !strncmp(name, match, matchlen) &&
-                   (match[matchlen-1] == '/' ||
-                    name[matchlen] == '\0' || name[matchlen] == '/'))
+               if (!matchlen ||
+                   ((matchlen <= namelen) &&
+                    !strncmp(name, match, matchlen) &&
+                    (match[matchlen-1] == '/' ||
+                     name[matchlen] == '\0' || name[matchlen] == '/')))
                        return 1;
                if (!fnmatch(match, name, 0))
                        return 1;
@@ -630,10 +631,9 @@ static int grep_tree(struct grep_opt *opt, const char **paths,
 static int grep_object(struct grep_opt *opt, const char **paths,
                       struct object *obj, const char *name)
 {
-       if (!strcmp(obj->type, blob_type))
+       if (obj->type == TYPE_BLOB)
                return grep_sha1(opt, obj->sha1, name);
-       if (!strcmp(obj->type, commit_type) ||
-           !strcmp(obj->type, tree_type)) {
+       if (obj->type == TYPE_COMMIT || obj->type == TYPE_TREE) {
                struct tree_desc tree;
                void *data;
                int hit;
@@ -646,7 +646,7 @@ static int grep_object(struct grep_opt *opt, const char **paths,
                free(data);
                return hit;
        }
-       die("unable to grep from object of type %s", obj->type);
+       die("unable to grep from object of type %s", typename(obj->type));
 }
 
 static const char builtin_grep_usage[] =