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Commit | Line | Data |
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358ddb62 LT |
1 | #include "cache.h" |
2 | #include "refs.h" | |
3 | #include "object.h" | |
4 | #include "tag.h" | |
ed9f7c95 | 5 | #include "path-list.h" |
358ddb62 | 6 | |
d8285af4 | 7 | static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*] < ref-list"; |
358ddb62 | 8 | |
c40abef8 | 9 | static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0, |
2eaf2224 | 10 | found_match = 0, verify = 0, quiet = 0, hash_only = 0, abbrev = 0; |
358ddb62 LT |
11 | static const char **pattern; |
12 | ||
64fe031a JH |
13 | static void show_one(const char *refname, const unsigned char *sha1) |
14 | { | |
15 | const char *hex = find_unique_abbrev(sha1, abbrev); | |
16 | if (hash_only) | |
17 | printf("%s\n", hex); | |
18 | else | |
19 | printf("%s %s\n", hex, refname); | |
20 | } | |
21 | ||
eaf12a8c | 22 | static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata) |
358ddb62 LT |
23 | { |
24 | struct object *obj; | |
2eaf2224 | 25 | const char *hex; |
cf0adba7 | 26 | unsigned char peeled[20]; |
358ddb62 LT |
27 | |
28 | if (tags_only || heads_only) { | |
29 | int match; | |
30 | ||
31 | match = heads_only && !strncmp(refname, "refs/heads/", 11); | |
32 | match |= tags_only && !strncmp(refname, "refs/tags/", 10); | |
33 | if (!match) | |
34 | return 0; | |
35 | } | |
36 | if (pattern) { | |
37 | int reflen = strlen(refname); | |
38 | const char **p = pattern, *m; | |
39 | while ((m = *p++) != NULL) { | |
40 | int len = strlen(m); | |
41 | if (len > reflen) | |
42 | continue; | |
43 | if (memcmp(m, refname + reflen - len, len)) | |
44 | continue; | |
45 | if (len == reflen) | |
46 | goto match; | |
47 | /* "--verify" requires an exact match */ | |
48 | if (verify) | |
49 | continue; | |
50 | if (refname[reflen - len - 1] == '/') | |
51 | goto match; | |
52 | } | |
53 | return 0; | |
54 | } | |
55 | ||
56 | match: | |
57 | found_match++; | |
cf0adba7 JH |
58 | |
59 | /* This changes the semantics slightly that even under quiet we | |
60 | * detect and return error if the repository is corrupt and | |
61 | * ref points at a nonexistent object. | |
62 | */ | |
63 | if (!has_sha1_file(sha1)) | |
64 | die("git-show-ref: bad ref %s (%s)", refname, | |
65 | sha1_to_hex(sha1)); | |
66 | ||
358ddb62 LT |
67 | if (quiet) |
68 | return 0; | |
2eaf2224 | 69 | |
64fe031a | 70 | show_one(refname, sha1); |
cf0adba7 JH |
71 | |
72 | if (!deref_tags) | |
73 | return 0; | |
74 | ||
75 | if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) { | |
f4204ab9 JH |
76 | if (!is_null_sha1(peeled)) { |
77 | hex = find_unique_abbrev(peeled, abbrev); | |
78 | printf("%s %s^{}\n", hex, refname); | |
79 | } | |
358ddb62 | 80 | } |
cf0adba7 JH |
81 | else { |
82 | obj = parse_object(sha1); | |
83 | if (!obj) | |
84 | die("git-show-ref: bad ref %s (%s)", refname, | |
85 | sha1_to_hex(sha1)); | |
86 | if (obj->type == OBJ_TAG) { | |
87 | obj = deref_tag(obj, refname, 0); | |
88 | hex = find_unique_abbrev(obj->sha1, abbrev); | |
89 | printf("%s %s^{}\n", hex, refname); | |
90 | } | |
91 | } | |
358ddb62 LT |
92 | return 0; |
93 | } | |
94 | ||
ed9f7c95 JH |
95 | static int add_existing(const char *refname, const unsigned char *sha1, int flag, void *cbdata) |
96 | { | |
97 | struct path_list *list = (struct path_list *)cbdata; | |
98 | path_list_insert(refname, list); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | /* | |
103 | * read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input, | |
104 | * and | |
105 | * (1) strip "^{}" at the end of line if any; | |
106 | * (2) ignore if match is provided and does not head-match refname; | |
107 | * (3) warn if refname is not a well-formed refname and skip; | |
108 | * (4) ignore if refname is a ref that exists in the local repository; | |
109 | * (5) otherwise output the line. | |
110 | */ | |
111 | static int exclude_existing(const char *match) | |
112 | { | |
113 | static struct path_list existing_refs = { NULL, 0, 0, 0 }; | |
114 | char buf[1024]; | |
115 | int matchlen = match ? strlen(match) : 0; | |
116 | ||
117 | for_each_ref(add_existing, &existing_refs); | |
118 | while (fgets(buf, sizeof(buf), stdin)) { | |
ed9f7c95 | 119 | char *ref; |
d8285af4 JH |
120 | int len = strlen(buf); |
121 | ||
ed9f7c95 JH |
122 | if (len > 0 && buf[len - 1] == '\n') |
123 | buf[--len] = '\0'; | |
d8285af4 | 124 | if (3 <= len && !strcmp(buf + len - 3, "^{}")) { |
ed9f7c95 JH |
125 | len -= 3; |
126 | buf[len] = '\0'; | |
127 | } | |
128 | for (ref = buf + len; buf < ref; ref--) | |
129 | if (isspace(ref[-1])) | |
130 | break; | |
131 | if (match) { | |
132 | int reflen = buf + len - ref; | |
133 | if (reflen < matchlen) | |
134 | continue; | |
135 | if (strncmp(ref, match, matchlen)) | |
136 | continue; | |
137 | } | |
138 | if (check_ref_format(ref)) { | |
139 | fprintf(stderr, "warning: ref '%s' ignored\n", ref); | |
140 | continue; | |
141 | } | |
142 | if (!path_list_has_path(&existing_refs, ref)) { | |
143 | printf("%s\n", buf); | |
144 | } | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
358ddb62 LT |
149 | int cmd_show_ref(int argc, const char **argv, const char *prefix) |
150 | { | |
151 | int i; | |
152 | ||
153 | for (i = 1; i < argc; i++) { | |
154 | const char *arg = argv[i]; | |
155 | if (*arg != '-') { | |
156 | pattern = argv + i; | |
157 | break; | |
158 | } | |
159 | if (!strcmp(arg, "--")) { | |
160 | pattern = argv + i + 1; | |
161 | if (!*pattern) | |
162 | pattern = NULL; | |
163 | break; | |
164 | } | |
165 | if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) { | |
166 | quiet = 1; | |
167 | continue; | |
168 | } | |
169 | if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) { | |
170 | show_head = 1; | |
171 | continue; | |
172 | } | |
173 | if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) { | |
174 | deref_tags = 1; | |
175 | continue; | |
176 | } | |
c40abef8 CC |
177 | if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) { |
178 | hash_only = 1; | |
179 | continue; | |
180 | } | |
2eaf2224 JH |
181 | if (!strncmp(arg, "--hash=", 7) || |
182 | (!strncmp(arg, "--abbrev", 8) && | |
183 | (arg[8] == '=' || arg[8] == '\0'))) { | |
64fe031a | 184 | if (arg[2] != 'h' && !arg[8]) |
2eaf2224 JH |
185 | /* --abbrev only */ |
186 | abbrev = DEFAULT_ABBREV; | |
187 | else { | |
188 | /* --hash= or --abbrev= */ | |
189 | char *end; | |
64fe031a | 190 | if (arg[2] == 'h') { |
2eaf2224 JH |
191 | hash_only = 1; |
192 | arg += 7; | |
193 | } | |
194 | else | |
195 | arg += 9; | |
196 | abbrev = strtoul(arg, &end, 10); | |
197 | if (*end || abbrev > 40) | |
198 | usage(show_ref_usage); | |
199 | if (abbrev < MINIMUM_ABBREV) | |
200 | abbrev = MINIMUM_ABBREV; | |
201 | } | |
202 | continue; | |
203 | } | |
358ddb62 LT |
204 | if (!strcmp(arg, "--verify")) { |
205 | verify = 1; | |
206 | continue; | |
207 | } | |
208 | if (!strcmp(arg, "--tags")) { | |
209 | tags_only = 1; | |
210 | continue; | |
211 | } | |
212 | if (!strcmp(arg, "--heads")) { | |
213 | heads_only = 1; | |
214 | continue; | |
215 | } | |
ed9f7c95 JH |
216 | if (!strcmp(arg, "--exclude-existing")) |
217 | return exclude_existing(NULL); | |
218 | if (!strncmp(arg, "--exclude-existing=", 19)) | |
219 | return exclude_existing(arg + 19); | |
358ddb62 LT |
220 | usage(show_ref_usage); |
221 | } | |
26cdd1e7 JH |
222 | |
223 | if (verify) { | |
8ab40a20 DL |
224 | if (!pattern) |
225 | die("--verify requires a reference"); | |
26cdd1e7 | 226 | while (*pattern) { |
8ab40a20 DL |
227 | unsigned char sha1[20]; |
228 | ||
64fe031a JH |
229 | if (!strncmp(*pattern, "refs/", 5) && |
230 | resolve_ref(*pattern, sha1, 1, NULL)) { | |
dd914299 | 231 | if (!quiet) |
64fe031a | 232 | show_one(*pattern, sha1); |
dd914299 | 233 | } |
26cdd1e7 JH |
234 | else if (!quiet) |
235 | die("'%s' - not a valid ref", *pattern); | |
236 | else | |
237 | return 1; | |
238 | pattern++; | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
358ddb62 | 243 | if (show_head) |
eaf12a8c JH |
244 | head_ref(show_ref, NULL); |
245 | for_each_ref(show_ref, NULL); | |
358ddb62 LT |
246 | if (!found_match) { |
247 | if (verify && !quiet) | |
248 | die("No match"); | |
249 | return 1; | |
250 | } | |
251 | return 0; | |
252 | } |