6 static struct refspec_item s_tag_refspec = {
16 /* See TAG_REFSPEC for the string version */
17 const struct refspec_item *tag_refspec = &s_tag_refspec;
20 * Parses the provided refspec 'refspec' and populates the refspec_item 'item'.
21 * Returns 1 if successful and 0 if the refspec is invalid.
23 static int parse_refspec(struct refspec_item *item, const char *refspec, int fetch)
27 const char *lhs, *rhs;
36 } else if (*lhs == '^') {
41 rhs = strrchr(lhs, ':');
43 /* negative refspecs only have one side */
44 if (item->negative && rhs)
48 * Before going on, special case ":" (or "+:") as a refspec
49 * for pushing matching refs.
51 if (!fetch && rhs == lhs && rhs[1] == '\0') {
57 size_t rlen = strlen(++rhs);
58 is_glob = (1 <= rlen && strchr(rhs, '*'));
59 item->dst = xstrndup(rhs, rlen);
64 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
65 if (1 <= llen && memchr(lhs, '*', llen)) {
66 if ((rhs && !is_glob) || (!rhs && !item->negative && fetch))
69 } else if (rhs && is_glob) {
73 item->pattern = is_glob;
74 item->src = xstrndup(lhs, llen);
75 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
78 struct object_id unused;
81 * Negative refspecs only have a LHS, which indicates a ref
82 * (or pattern of refs) to exclude from other matches. This
83 * can either be a simple ref, or a glob pattern. Exact sha1
84 * match is not currently supported.
87 return 0; /* negative refspecs must not be empty */
88 else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
89 return 0; /* negative refpsecs cannot be exact sha1 */
90 else if (!check_refname_format(item->src, flags))
91 ; /* valid looking ref is ok */
95 /* the other rules below do not apply to negative refspecs */
100 struct object_id unused;
104 ; /* empty is ok; it means "HEAD" */
105 else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
106 item->exact_sha1 = 1; /* ok */
107 else if (!check_refname_format(item->src, flags))
108 ; /* valid looking ref is ok */
113 ; /* missing is ok; it is the same as empty */
114 else if (!*item->dst)
115 ; /* empty is ok; it means "do not store" */
116 else if (!check_refname_format(item->dst, flags))
117 ; /* valid looking ref is ok */
123 * - empty is allowed; it means delete.
124 * - when wildcarded, it must be a valid looking ref.
125 * - otherwise, it must be an extended SHA-1, but
126 * there is no existing way to validate this.
131 if (check_refname_format(item->src, flags))
135 ; /* anything goes, for now */
138 * - missing is allowed, but LHS then must be a
140 * - empty is not allowed.
141 * - otherwise it must be a valid looking ref.
144 if (check_refname_format(item->src, flags))
146 } else if (!*item->dst) {
149 if (check_refname_format(item->dst, flags))
157 int refspec_item_init(struct refspec_item *item, const char *refspec, int fetch)
159 memset(item, 0, sizeof(*item));
160 return parse_refspec(item, refspec, fetch);
163 void refspec_item_init_or_die(struct refspec_item *item, const char *refspec,
166 if (!refspec_item_init(item, refspec, fetch))
167 die(_("invalid refspec '%s'"), refspec);
170 void refspec_item_clear(struct refspec_item *item)
172 FREE_AND_NULL(item->src);
173 FREE_AND_NULL(item->dst);
177 item->exact_sha1 = 0;
180 void refspec_init(struct refspec *rs, int fetch)
182 memset(rs, 0, sizeof(*rs));
186 static void refspec_append_nodup(struct refspec *rs, char *refspec)
188 struct refspec_item item;
190 refspec_item_init_or_die(&item, refspec, rs->fetch);
192 ALLOC_GROW(rs->items, rs->nr + 1, rs->alloc);
193 rs->items[rs->nr++] = item;
195 ALLOC_GROW(rs->raw, rs->raw_nr + 1, rs->raw_alloc);
196 rs->raw[rs->raw_nr++] = refspec;
199 void refspec_append(struct refspec *rs, const char *refspec)
201 refspec_append_nodup(rs, xstrdup(refspec));
204 void refspec_appendf(struct refspec *rs, const char *fmt, ...)
209 refspec_append_nodup(rs, xstrvfmt(fmt, ap));
213 void refspec_appendn(struct refspec *rs, const char **refspecs, int nr)
216 for (i = 0; i < nr; i++)
217 refspec_append(rs, refspecs[i]);
220 void refspec_clear(struct refspec *rs)
224 for (i = 0; i < rs->nr; i++)
225 refspec_item_clear(&rs->items[i]);
227 FREE_AND_NULL(rs->items);
231 for (i = 0; i < rs->raw_nr; i++)
232 free((char *)rs->raw[i]);
233 FREE_AND_NULL(rs->raw);
240 int valid_fetch_refspec(const char *fetch_refspec_str)
242 struct refspec_item refspec;
243 int ret = refspec_item_init(&refspec, fetch_refspec_str, REFSPEC_FETCH);
244 refspec_item_clear(&refspec);
248 void refspec_ref_prefixes(const struct refspec *rs,
249 struct strvec *ref_prefixes)
252 for (i = 0; i < rs->nr; i++) {
253 const struct refspec_item *item = &rs->items[i];
254 const char *prefix = NULL;
256 if (item->exact_sha1 || item->negative)
258 if (rs->fetch == REFSPEC_FETCH)
262 else if (item->src && !item->exact_sha1)
267 const char *glob = strchr(prefix, '*');
268 strvec_pushf(ref_prefixes, "%.*s",
269 (int)(glob - prefix),
272 expand_ref_prefix(ref_prefixes, prefix);