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Commit | Line | Data |
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ec0cb496 | 1 | #include "cache.h" |
dbbcd44f | 2 | #include "strvec.h" |
ec0cb496 BW |
3 | #include "refs.h" |
4 | #include "refspec.h" | |
5 | ||
0ad4a5ff | 6 | static struct refspec_item s_tag_refspec = { |
ec0cb496 BW |
7 | 0, |
8 | 1, | |
9 | 0, | |
10 | 0, | |
c0192df6 | 11 | 0, |
ec0cb496 BW |
12 | "refs/tags/*", |
13 | "refs/tags/*" | |
14 | }; | |
15 | ||
16 | /* See TAG_REFSPEC for the string version */ | |
0ad4a5ff | 17 | const struct refspec_item *tag_refspec = &s_tag_refspec; |
ec0cb496 | 18 | |
3eec3700 BW |
19 | /* |
20 | * Parses the provided refspec 'refspec' and populates the refspec_item 'item'. | |
21 | * Returns 1 if successful and 0 if the refspec is invalid. | |
22 | */ | |
23 | static int parse_refspec(struct refspec_item *item, const char *refspec, int fetch) | |
ec0cb496 | 24 | { |
3eec3700 BW |
25 | size_t llen; |
26 | int is_glob; | |
27 | const char *lhs, *rhs; | |
28 | int flags; | |
ec0cb496 | 29 | |
3eec3700 | 30 | is_glob = 0; |
ec0cb496 | 31 | |
3eec3700 BW |
32 | lhs = refspec; |
33 | if (*lhs == '+') { | |
34 | item->force = 1; | |
35 | lhs++; | |
c0192df6 JK |
36 | } else if (*lhs == '^') { |
37 | item->negative = 1; | |
38 | lhs++; | |
3eec3700 | 39 | } |
ec0cb496 | 40 | |
3eec3700 | 41 | rhs = strrchr(lhs, ':'); |
ec0cb496 | 42 | |
c0192df6 JK |
43 | /* negative refspecs only have one side */ |
44 | if (item->negative && rhs) | |
45 | return 0; | |
46 | ||
3eec3700 BW |
47 | /* |
48 | * Before going on, special case ":" (or "+:") as a refspec | |
49 | * for pushing matching refs. | |
50 | */ | |
51 | if (!fetch && rhs == lhs && rhs[1] == '\0') { | |
52 | item->matching = 1; | |
53 | return 1; | |
54 | } | |
ec0cb496 | 55 | |
3eec3700 BW |
56 | if (rhs) { |
57 | size_t rlen = strlen(++rhs); | |
58 | is_glob = (1 <= rlen && strchr(rhs, '*')); | |
59 | item->dst = xstrndup(rhs, rlen); | |
c3072c6e JH |
60 | } else { |
61 | item->dst = NULL; | |
3eec3700 BW |
62 | } |
63 | ||
64 | llen = (rhs ? (rhs - lhs - 1) : strlen(lhs)); | |
65 | if (1 <= llen && memchr(lhs, '*', llen)) { | |
c0192df6 | 66 | if ((rhs && !is_glob) || (!rhs && !item->negative && fetch)) |
3eec3700 BW |
67 | return 0; |
68 | is_glob = 1; | |
69 | } else if (rhs && is_glob) { | |
70 | return 0; | |
71 | } | |
72 | ||
73 | item->pattern = is_glob; | |
374fbaef FC |
74 | if (llen == 1 && *lhs == '@') |
75 | item->src = xstrdup("HEAD"); | |
76 | else | |
77 | item->src = xstrndup(lhs, llen); | |
3eec3700 BW |
78 | flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); |
79 | ||
c0192df6 JK |
80 | if (item->negative) { |
81 | struct object_id unused; | |
82 | ||
83 | /* | |
84 | * Negative refspecs only have a LHS, which indicates a ref | |
85 | * (or pattern of refs) to exclude from other matches. This | |
86 | * can either be a simple ref, or a glob pattern. Exact sha1 | |
87 | * match is not currently supported. | |
88 | */ | |
89 | if (!*item->src) | |
90 | return 0; /* negative refspecs must not be empty */ | |
91 | else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused)) | |
92 | return 0; /* negative refpsecs cannot be exact sha1 */ | |
93 | else if (!check_refname_format(item->src, flags)) | |
94 | ; /* valid looking ref is ok */ | |
95 | else | |
96 | return 0; | |
97 | ||
98 | /* the other rules below do not apply to negative refspecs */ | |
99 | return 1; | |
100 | } | |
101 | ||
3eec3700 BW |
102 | if (fetch) { |
103 | struct object_id unused; | |
104 | ||
105 | /* LHS */ | |
106 | if (!*item->src) | |
107 | ; /* empty is ok; it means "HEAD" */ | |
b8d45d03 | 108 | else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused)) |
3eec3700 BW |
109 | item->exact_sha1 = 1; /* ok */ |
110 | else if (!check_refname_format(item->src, flags)) | |
111 | ; /* valid looking ref is ok */ | |
112 | else | |
113 | return 0; | |
114 | /* RHS */ | |
115 | if (!item->dst) | |
116 | ; /* missing is ok; it is the same as empty */ | |
117 | else if (!*item->dst) | |
118 | ; /* empty is ok; it means "do not store" */ | |
119 | else if (!check_refname_format(item->dst, flags)) | |
120 | ; /* valid looking ref is ok */ | |
121 | else | |
122 | return 0; | |
123 | } else { | |
ec0cb496 | 124 | /* |
3eec3700 BW |
125 | * LHS |
126 | * - empty is allowed; it means delete. | |
127 | * - when wildcarded, it must be a valid looking ref. | |
128 | * - otherwise, it must be an extended SHA-1, but | |
129 | * there is no existing way to validate this. | |
ec0cb496 | 130 | */ |
3eec3700 BW |
131 | if (!*item->src) |
132 | ; /* empty is ok */ | |
133 | else if (is_glob) { | |
134 | if (check_refname_format(item->src, flags)) | |
135 | return 0; | |
ec0cb496 | 136 | } |
3eec3700 BW |
137 | else |
138 | ; /* anything goes, for now */ | |
139 | /* | |
140 | * RHS | |
141 | * - missing is allowed, but LHS then must be a | |
142 | * valid looking ref. | |
143 | * - empty is not allowed. | |
144 | * - otherwise it must be a valid looking ref. | |
145 | */ | |
146 | if (!item->dst) { | |
147 | if (check_refname_format(item->src, flags)) | |
148 | return 0; | |
149 | } else if (!*item->dst) { | |
150 | return 0; | |
151 | } else { | |
152 | if (check_refname_format(item->dst, flags)) | |
153 | return 0; | |
ec0cb496 | 154 | } |
3eec3700 | 155 | } |
ec0cb496 | 156 | |
3eec3700 BW |
157 | return 1; |
158 | } | |
ec0cb496 | 159 | |
c495fd3d | 160 | int refspec_item_init(struct refspec_item *item, const char *refspec, int fetch) |
6d4c0578 BW |
161 | { |
162 | memset(item, 0, sizeof(*item)); | |
c495fd3d ÆAB |
163 | return parse_refspec(item, refspec, fetch); |
164 | } | |
6d4c0578 | 165 | |
c495fd3d ÆAB |
166 | void refspec_item_init_or_die(struct refspec_item *item, const char *refspec, |
167 | int fetch) | |
168 | { | |
169 | if (!refspec_item_init(item, refspec, fetch)) | |
1b5e07bb | 170 | die(_("invalid refspec '%s'"), refspec); |
6d4c0578 BW |
171 | } |
172 | ||
173 | void refspec_item_clear(struct refspec_item *item) | |
174 | { | |
175 | FREE_AND_NULL(item->src); | |
176 | FREE_AND_NULL(item->dst); | |
177 | item->force = 0; | |
178 | item->pattern = 0; | |
179 | item->matching = 0; | |
180 | item->exact_sha1 = 0; | |
181 | } | |
182 | ||
183 | void refspec_init(struct refspec *rs, int fetch) | |
184 | { | |
185 | memset(rs, 0, sizeof(*rs)); | |
186 | rs->fetch = fetch; | |
187 | } | |
188 | ||
1af8b8c0 | 189 | static void refspec_append_nodup(struct refspec *rs, char *refspec) |
6d4c0578 BW |
190 | { |
191 | struct refspec_item item; | |
192 | ||
dc064221 | 193 | refspec_item_init_or_die(&item, refspec, rs->fetch); |
6d4c0578 BW |
194 | |
195 | ALLOC_GROW(rs->items, rs->nr + 1, rs->alloc); | |
196 | rs->items[rs->nr++] = item; | |
197 | ||
198 | ALLOC_GROW(rs->raw, rs->raw_nr + 1, rs->raw_alloc); | |
1af8b8c0 RS |
199 | rs->raw[rs->raw_nr++] = refspec; |
200 | } | |
201 | ||
202 | void refspec_append(struct refspec *rs, const char *refspec) | |
203 | { | |
204 | refspec_append_nodup(rs, xstrdup(refspec)); | |
205 | } | |
206 | ||
207 | void refspec_appendf(struct refspec *rs, const char *fmt, ...) | |
208 | { | |
209 | va_list ap; | |
210 | ||
211 | va_start(ap, fmt); | |
212 | refspec_append_nodup(rs, xstrvfmt(fmt, ap)); | |
213 | va_end(ap); | |
6d4c0578 BW |
214 | } |
215 | ||
216 | void refspec_appendn(struct refspec *rs, const char **refspecs, int nr) | |
217 | { | |
218 | int i; | |
219 | for (i = 0; i < nr; i++) | |
220 | refspec_append(rs, refspecs[i]); | |
221 | } | |
222 | ||
223 | void refspec_clear(struct refspec *rs) | |
224 | { | |
225 | int i; | |
226 | ||
227 | for (i = 0; i < rs->nr; i++) | |
228 | refspec_item_clear(&rs->items[i]); | |
229 | ||
230 | FREE_AND_NULL(rs->items); | |
231 | rs->alloc = 0; | |
232 | rs->nr = 0; | |
233 | ||
234 | for (i = 0; i < rs->raw_nr; i++) | |
235 | free((char *)rs->raw[i]); | |
236 | FREE_AND_NULL(rs->raw); | |
237 | rs->raw_alloc = 0; | |
238 | rs->raw_nr = 0; | |
239 | ||
240 | rs->fetch = 0; | |
241 | } | |
c8fa9efe BW |
242 | |
243 | int valid_fetch_refspec(const char *fetch_refspec_str) | |
244 | { | |
245 | struct refspec_item refspec; | |
7865d157 | 246 | int ret = refspec_item_init(&refspec, fetch_refspec_str, REFSPEC_FETCH); |
c8fa9efe BW |
247 | refspec_item_clear(&refspec); |
248 | return ret; | |
249 | } | |
6373cb59 | 250 | |
f2c6fda8 SB |
251 | int valid_remote_name(const char *name) |
252 | { | |
253 | int result; | |
254 | struct strbuf refspec = STRBUF_INIT; | |
255 | strbuf_addf(&refspec, "refs/heads/test:refs/remotes/%s/test", name); | |
256 | result = valid_fetch_refspec(refspec.buf); | |
257 | strbuf_release(&refspec); | |
258 | return result; | |
259 | } | |
260 | ||
6373cb59 | 261 | void refspec_ref_prefixes(const struct refspec *rs, |
c972bf4c | 262 | struct strvec *ref_prefixes) |
6373cb59 BW |
263 | { |
264 | int i; | |
265 | for (i = 0; i < rs->nr; i++) { | |
266 | const struct refspec_item *item = &rs->items[i]; | |
267 | const char *prefix = NULL; | |
268 | ||
c0192df6 | 269 | if (item->exact_sha1 || item->negative) |
6c301adb | 270 | continue; |
6373cb59 BW |
271 | if (rs->fetch == REFSPEC_FETCH) |
272 | prefix = item->src; | |
273 | else if (item->dst) | |
274 | prefix = item->dst; | |
275 | else if (item->src && !item->exact_sha1) | |
276 | prefix = item->src; | |
277 | ||
bfded875 FC |
278 | if (!prefix) |
279 | continue; | |
280 | ||
281 | if (item->pattern) { | |
282 | const char *glob = strchr(prefix, '*'); | |
283 | strvec_pushf(ref_prefixes, "%.*s", | |
284 | (int)(glob - prefix), | |
285 | prefix); | |
286 | } else { | |
287 | expand_ref_prefix(ref_prefixes, prefix); | |
6373cb59 BW |
288 | } |
289 | } | |
290 | } |