Merge branch 'js/gitdir-at-unc-root'
[git/git.git] / refspec.c
CommitLineData
ec0cb496 1#include "cache.h"
6373cb59 2#include "argv-array.h"
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3#include "refs.h"
4#include "refspec.h"
5
0ad4a5ff 6static struct refspec_item s_tag_refspec = {
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7 0,
8 1,
9 0,
10 0,
11 "refs/tags/*",
12 "refs/tags/*"
13};
14
15/* See TAG_REFSPEC for the string version */
0ad4a5ff 16const struct refspec_item *tag_refspec = &s_tag_refspec;
ec0cb496 17
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18/*
19 * Parses the provided refspec 'refspec' and populates the refspec_item 'item'.
20 * Returns 1 if successful and 0 if the refspec is invalid.
21 */
22static int parse_refspec(struct refspec_item *item, const char *refspec, int fetch)
ec0cb496 23{
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24 size_t llen;
25 int is_glob;
26 const char *lhs, *rhs;
27 int flags;
ec0cb496 28
3eec3700 29 is_glob = 0;
ec0cb496 30
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31 lhs = refspec;
32 if (*lhs == '+') {
33 item->force = 1;
34 lhs++;
35 }
ec0cb496 36
3eec3700 37 rhs = strrchr(lhs, ':');
ec0cb496 38
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39 /*
40 * Before going on, special case ":" (or "+:") as a refspec
41 * for pushing matching refs.
42 */
43 if (!fetch && rhs == lhs && rhs[1] == '\0') {
44 item->matching = 1;
45 return 1;
46 }
ec0cb496 47
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48 if (rhs) {
49 size_t rlen = strlen(++rhs);
50 is_glob = (1 <= rlen && strchr(rhs, '*'));
51 item->dst = xstrndup(rhs, rlen);
c3072c6e
JH
52 } else {
53 item->dst = NULL;
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54 }
55
56 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
57 if (1 <= llen && memchr(lhs, '*', llen)) {
58 if ((rhs && !is_glob) || (!rhs && fetch))
59 return 0;
60 is_glob = 1;
61 } else if (rhs && is_glob) {
62 return 0;
63 }
64
65 item->pattern = is_glob;
66 item->src = xstrndup(lhs, llen);
67 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
68
69 if (fetch) {
70 struct object_id unused;
71
72 /* LHS */
73 if (!*item->src)
74 ; /* empty is ok; it means "HEAD" */
b8d45d03 75 else if (llen == the_hash_algo->hexsz && !get_oid_hex(item->src, &unused))
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76 item->exact_sha1 = 1; /* ok */
77 else if (!check_refname_format(item->src, flags))
78 ; /* valid looking ref is ok */
79 else
80 return 0;
81 /* RHS */
82 if (!item->dst)
83 ; /* missing is ok; it is the same as empty */
84 else if (!*item->dst)
85 ; /* empty is ok; it means "do not store" */
86 else if (!check_refname_format(item->dst, flags))
87 ; /* valid looking ref is ok */
88 else
89 return 0;
90 } else {
ec0cb496 91 /*
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92 * LHS
93 * - empty is allowed; it means delete.
94 * - when wildcarded, it must be a valid looking ref.
95 * - otherwise, it must be an extended SHA-1, but
96 * there is no existing way to validate this.
ec0cb496 97 */
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98 if (!*item->src)
99 ; /* empty is ok */
100 else if (is_glob) {
101 if (check_refname_format(item->src, flags))
102 return 0;
ec0cb496 103 }
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104 else
105 ; /* anything goes, for now */
106 /*
107 * RHS
108 * - missing is allowed, but LHS then must be a
109 * valid looking ref.
110 * - empty is not allowed.
111 * - otherwise it must be a valid looking ref.
112 */
113 if (!item->dst) {
114 if (check_refname_format(item->src, flags))
115 return 0;
116 } else if (!*item->dst) {
117 return 0;
118 } else {
119 if (check_refname_format(item->dst, flags))
120 return 0;
ec0cb496 121 }
3eec3700 122 }
ec0cb496 123
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124 return 1;
125}
ec0cb496 126
c495fd3d 127int refspec_item_init(struct refspec_item *item, const char *refspec, int fetch)
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128{
129 memset(item, 0, sizeof(*item));
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130 return parse_refspec(item, refspec, fetch);
131}
6d4c0578 132
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133void refspec_item_init_or_die(struct refspec_item *item, const char *refspec,
134 int fetch)
135{
136 if (!refspec_item_init(item, refspec, fetch))
1b5e07bb 137 die(_("invalid refspec '%s'"), refspec);
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138}
139
140void refspec_item_clear(struct refspec_item *item)
141{
142 FREE_AND_NULL(item->src);
143 FREE_AND_NULL(item->dst);
144 item->force = 0;
145 item->pattern = 0;
146 item->matching = 0;
147 item->exact_sha1 = 0;
148}
149
150void refspec_init(struct refspec *rs, int fetch)
151{
152 memset(rs, 0, sizeof(*rs));
153 rs->fetch = fetch;
154}
155
156void refspec_append(struct refspec *rs, const char *refspec)
157{
158 struct refspec_item item;
159
dc064221 160 refspec_item_init_or_die(&item, refspec, rs->fetch);
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161
162 ALLOC_GROW(rs->items, rs->nr + 1, rs->alloc);
163 rs->items[rs->nr++] = item;
164
165 ALLOC_GROW(rs->raw, rs->raw_nr + 1, rs->raw_alloc);
166 rs->raw[rs->raw_nr++] = xstrdup(refspec);
167}
168
169void refspec_appendn(struct refspec *rs, const char **refspecs, int nr)
170{
171 int i;
172 for (i = 0; i < nr; i++)
173 refspec_append(rs, refspecs[i]);
174}
175
176void refspec_clear(struct refspec *rs)
177{
178 int i;
179
180 for (i = 0; i < rs->nr; i++)
181 refspec_item_clear(&rs->items[i]);
182
183 FREE_AND_NULL(rs->items);
184 rs->alloc = 0;
185 rs->nr = 0;
186
187 for (i = 0; i < rs->raw_nr; i++)
188 free((char *)rs->raw[i]);
189 FREE_AND_NULL(rs->raw);
190 rs->raw_alloc = 0;
191 rs->raw_nr = 0;
192
193 rs->fetch = 0;
194}
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195
196int valid_fetch_refspec(const char *fetch_refspec_str)
197{
198 struct refspec_item refspec;
7865d157 199 int ret = refspec_item_init(&refspec, fetch_refspec_str, REFSPEC_FETCH);
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200 refspec_item_clear(&refspec);
201 return ret;
202}
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203
204void refspec_ref_prefixes(const struct refspec *rs,
205 struct argv_array *ref_prefixes)
206{
207 int i;
208 for (i = 0; i < rs->nr; i++) {
209 const struct refspec_item *item = &rs->items[i];
210 const char *prefix = NULL;
211
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212 if (item->exact_sha1)
213 continue;
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214 if (rs->fetch == REFSPEC_FETCH)
215 prefix = item->src;
216 else if (item->dst)
217 prefix = item->dst;
218 else if (item->src && !item->exact_sha1)
219 prefix = item->src;
220
221 if (prefix) {
222 if (item->pattern) {
223 const char *glob = strchr(prefix, '*');
224 argv_array_pushf(ref_prefixes, "%.*s",
225 (int)(glob - prefix),
226 prefix);
227 } else {
228 expand_ref_prefix(ref_prefixes, prefix);
229 }
230 }
231 }
232}