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1 | #include "cache.h" |
2 | #include "refs.h" | |
3 | #include "refspec.h" | |
4 | ||
0ad4a5ff | 5 | static struct refspec_item s_tag_refspec = { |
ec0cb496 BW |
6 | 0, |
7 | 1, | |
8 | 0, | |
9 | 0, | |
10 | "refs/tags/*", | |
11 | "refs/tags/*" | |
12 | }; | |
13 | ||
14 | /* See TAG_REFSPEC for the string version */ | |
0ad4a5ff | 15 | const struct refspec_item *tag_refspec = &s_tag_refspec; |
ec0cb496 | 16 | |
0ad4a5ff | 17 | static struct refspec_item *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify) |
ec0cb496 BW |
18 | { |
19 | int i; | |
0ad4a5ff | 20 | struct refspec_item *rs = xcalloc(nr_refspec, sizeof(*rs)); |
ec0cb496 BW |
21 | |
22 | for (i = 0; i < nr_refspec; i++) { | |
23 | size_t llen; | |
24 | int is_glob; | |
25 | const char *lhs, *rhs; | |
26 | int flags; | |
27 | ||
28 | is_glob = 0; | |
29 | ||
30 | lhs = refspec[i]; | |
31 | if (*lhs == '+') { | |
32 | rs[i].force = 1; | |
33 | lhs++; | |
34 | } | |
35 | ||
36 | rhs = strrchr(lhs, ':'); | |
37 | ||
38 | /* | |
39 | * Before going on, special case ":" (or "+:") as a refspec | |
40 | * for pushing matching refs. | |
41 | */ | |
42 | if (!fetch && rhs == lhs && rhs[1] == '\0') { | |
43 | rs[i].matching = 1; | |
44 | continue; | |
45 | } | |
46 | ||
47 | if (rhs) { | |
48 | size_t rlen = strlen(++rhs); | |
49 | is_glob = (1 <= rlen && strchr(rhs, '*')); | |
50 | rs[i].dst = xstrndup(rhs, rlen); | |
51 | } | |
52 | ||
53 | llen = (rhs ? (rhs - lhs - 1) : strlen(lhs)); | |
54 | if (1 <= llen && memchr(lhs, '*', llen)) { | |
55 | if ((rhs && !is_glob) || (!rhs && fetch)) | |
56 | goto invalid; | |
57 | is_glob = 1; | |
58 | } else if (rhs && is_glob) { | |
59 | goto invalid; | |
60 | } | |
61 | ||
62 | rs[i].pattern = is_glob; | |
63 | rs[i].src = xstrndup(lhs, llen); | |
64 | flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); | |
65 | ||
66 | if (fetch) { | |
67 | struct object_id unused; | |
68 | ||
69 | /* LHS */ | |
70 | if (!*rs[i].src) | |
71 | ; /* empty is ok; it means "HEAD" */ | |
72 | else if (llen == GIT_SHA1_HEXSZ && !get_oid_hex(rs[i].src, &unused)) | |
73 | rs[i].exact_sha1 = 1; /* ok */ | |
74 | else if (!check_refname_format(rs[i].src, flags)) | |
75 | ; /* valid looking ref is ok */ | |
76 | else | |
77 | goto invalid; | |
78 | /* RHS */ | |
79 | if (!rs[i].dst) | |
80 | ; /* missing is ok; it is the same as empty */ | |
81 | else if (!*rs[i].dst) | |
82 | ; /* empty is ok; it means "do not store" */ | |
83 | else if (!check_refname_format(rs[i].dst, flags)) | |
84 | ; /* valid looking ref is ok */ | |
85 | else | |
86 | goto invalid; | |
87 | } else { | |
88 | /* | |
89 | * LHS | |
90 | * - empty is allowed; it means delete. | |
91 | * - when wildcarded, it must be a valid looking ref. | |
92 | * - otherwise, it must be an extended SHA-1, but | |
93 | * there is no existing way to validate this. | |
94 | */ | |
95 | if (!*rs[i].src) | |
96 | ; /* empty is ok */ | |
97 | else if (is_glob) { | |
98 | if (check_refname_format(rs[i].src, flags)) | |
99 | goto invalid; | |
100 | } | |
101 | else | |
102 | ; /* anything goes, for now */ | |
103 | /* | |
104 | * RHS | |
105 | * - missing is allowed, but LHS then must be a | |
106 | * valid looking ref. | |
107 | * - empty is not allowed. | |
108 | * - otherwise it must be a valid looking ref. | |
109 | */ | |
110 | if (!rs[i].dst) { | |
111 | if (check_refname_format(rs[i].src, flags)) | |
112 | goto invalid; | |
113 | } else if (!*rs[i].dst) { | |
114 | goto invalid; | |
115 | } else { | |
116 | if (check_refname_format(rs[i].dst, flags)) | |
117 | goto invalid; | |
118 | } | |
119 | } | |
120 | } | |
121 | return rs; | |
122 | ||
123 | invalid: | |
124 | if (verify) { | |
125 | /* | |
126 | * nr_refspec must be greater than zero and i must be valid | |
127 | * since it is only possible to reach this point from within | |
128 | * the for loop above. | |
129 | */ | |
130 | free_refspec(i+1, rs); | |
131 | return NULL; | |
132 | } | |
133 | die("Invalid refspec '%s'", refspec[i]); | |
134 | } | |
135 | ||
136 | int valid_fetch_refspec(const char *fetch_refspec_str) | |
137 | { | |
0ad4a5ff | 138 | struct refspec_item *refspec; |
ec0cb496 BW |
139 | |
140 | refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1); | |
141 | free_refspec(1, refspec); | |
142 | return !!refspec; | |
143 | } | |
144 | ||
0ad4a5ff | 145 | struct refspec_item *parse_fetch_refspec(int nr_refspec, const char **refspec) |
ec0cb496 BW |
146 | { |
147 | return parse_refspec_internal(nr_refspec, refspec, 1, 0); | |
148 | } | |
149 | ||
0ad4a5ff | 150 | struct refspec_item *parse_push_refspec(int nr_refspec, const char **refspec) |
ec0cb496 BW |
151 | { |
152 | return parse_refspec_internal(nr_refspec, refspec, 0, 0); | |
153 | } | |
154 | ||
0ad4a5ff | 155 | void free_refspec(int nr_refspec, struct refspec_item *refspec) |
ec0cb496 BW |
156 | { |
157 | int i; | |
158 | ||
159 | if (!refspec) | |
160 | return; | |
161 | ||
162 | for (i = 0; i < nr_refspec; i++) { | |
163 | free(refspec[i].src); | |
164 | free(refspec[i].dst); | |
165 | } | |
166 | free(refspec); | |
167 | } |