doc/clone: Pick more compelling paths for the --reference example

diff --git a/grep.c b/grep.c
index 279a55933c2e570ef3bb51da3cfd55357a5b0c86..bb548cae69d1eece8832c97332a91daac5f8dceb 100644 (file)
--- a/grep.c
+++ b/grep.c
@@ -16,6 +16,11 @@ static struct grep_opt grep_defaults;
 void init_grep_defaults(void)
 {
        struct grep_opt *opt = &grep_defaults;
+       static int run_once;
+
+       if (run_once)
+               return;
+       run_once++;
 
        memset(opt, 0, sizeof(*opt));
        opt->relative = 1;
@@ -620,7 +625,8 @@ static struct grep_expr *prep_header_patterns(struct grep_opt *opt)
        for (p = opt->header_list; p; p = p->next) {
                if (p->token != GREP_PATTERN_HEAD)
                        die("bug: a non-header pattern in grep header list.");
-               if (p->field < 0 || GREP_HEADER_FIELD_MAX <= p->field)
+               if (p->field < GREP_HEADER_FIELD_MIN ||
+                   GREP_HEADER_FIELD_MAX <= p->field)
                        die("bug: unknown header field %d", p->field);
                compile_regexp(p, opt);
        }
@@ -1545,7 +1551,7 @@ int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
        struct grep_source gs;
        int r;
 
-       grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL);
+       grep_source_init(&gs, GREP_SOURCE_BUF, NULL, NULL, NULL);
        gs.buf = buf;
        gs.size = size;
 
@@ -1556,10 +1562,12 @@ int grep_buffer(struct grep_opt *opt, char *buf, unsigned long size)
 }
 
 void grep_source_init(struct grep_source *gs, enum grep_source_type type,
-                     const char *name, const void *identifier)
+                     const char *name, const char *path,
+                     const void *identifier)
 {
        gs->type = type;
        gs->name = name ? xstrdup(name) : NULL;
+       gs->path = path ? xstrdup(path) : NULL;
        gs->buf = NULL;
        gs->size = 0;
        gs->driver = NULL;
@@ -1581,6 +1589,8 @@ void grep_source_clear(struct grep_source *gs)
 {
        free(gs->name);
        gs->name = NULL;
+       free(gs->path);
+       gs->path = NULL;
        free(gs->identifier);
        gs->identifier = NULL;
        grep_source_clear_data(gs);
@@ -1673,7 +1683,8 @@ void grep_source_load_driver(struct grep_source *gs)
                return;
 
        grep_attr_lock();
-       gs->driver = userdiff_find_by_path(gs->name);
+       if (gs->path)
+               gs->driver = userdiff_find_by_path(gs->path);
        if (!gs->driver)
                gs->driver = userdiff_find_by_name("default");
        grep_attr_unlock();