Documentation: reset: describe new "--keep" option

diff --git a/refs.c b/refs.c
index 3e73a0a36dbea4046e5b7b0550b2f4bb67539439..503a8c2bd0fa7e4fb825d543e007995701150948 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -519,6 +519,13 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
        return ref;
 }
 
+/* The argument to filter_refs */
+struct ref_filter {
+       const char *pattern;
+       each_ref_fn *fn;
+       void *cb_data;
+};
+
 int read_ref(const char *ref, unsigned char *sha1)
 {
        if (resolve_ref(ref, sha1, 1, NULL))
@@ -545,6 +552,15 @@ static int do_one_ref(const char *base, each_ref_fn fn, int trim,
        return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
 }
 
+static int filter_refs(const char *ref, const unsigned char *sha, int flags,
+       void *data)
+{
+       struct ref_filter *filter = (struct ref_filter *)data;
+       if (fnmatch(filter->pattern, ref, 0))
+               return 0;
+       return filter->fn(ref, sha, flags, filter->cb_data);
+}
+
 int peel_ref(const char *ref, unsigned char *sha1)
 {
        int flag;
@@ -674,6 +690,43 @@ int for_each_replace_ref(each_ref_fn fn, void *cb_data)
        return do_for_each_ref("refs/replace/", fn, 13, 0, cb_data);
 }
 
+int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
+       const char *prefix, void *cb_data)
+{
+       struct strbuf real_pattern = STRBUF_INIT;
+       struct ref_filter filter;
+       const char *has_glob_specials;
+       int ret;
+
+       if (!prefix && prefixcmp(pattern, "refs/"))
+               strbuf_addstr(&real_pattern, "refs/");
+       else if (prefix)
+               strbuf_addstr(&real_pattern, prefix);
+       strbuf_addstr(&real_pattern, pattern);
+
+       has_glob_specials = strpbrk(pattern, "?*[");
+       if (!has_glob_specials) {
+               /* Append impiled '/' '*' if not present. */
+               if (real_pattern.buf[real_pattern.len - 1] != '/')
+                       strbuf_addch(&real_pattern, '/');
+               /* No need to check for '*', there is none. */
+               strbuf_addch(&real_pattern, '*');
+       }
+
+       filter.pattern = real_pattern.buf;
+       filter.fn = fn;
+       filter.cb_data = cb_data;
+       ret = for_each_ref(filter_refs, &filter);
+
+       strbuf_release(&real_pattern);
+       return ret;
+}
+
+int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data)
+{
+       return for_each_glob_ref_in(fn, pattern, NULL, cb_data);
+}
+
 int for_each_rawref(each_ref_fn fn, void *cb_data)
 {
        return do_for_each_ref("refs/", fn, 0,