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bd321bcc JS |
1 | #include <stdlib.h> |
2 | #include "cache.h" | |
3 | #include "commit.h" | |
4 | #include "tag.h" | |
5 | #include "refs.h" | |
6 | ||
7 | static const char name_rev_usage[] = | |
8 | "git-name-rev [--tags] ( --all | --stdin | commitish [commitish...] )\n"; | |
9 | ||
10 | typedef struct rev_name { | |
11 | const char *tip_name; | |
12 | int merge_traversals; | |
13 | int generation; | |
14 | } rev_name; | |
15 | ||
16 | static long cutoff = LONG_MAX; | |
17 | ||
18 | static void name_rev(struct commit *commit, | |
19 | const char *tip_name, int merge_traversals, int generation, | |
20 | int deref) | |
21 | { | |
22 | struct rev_name *name = (struct rev_name *)commit->object.util; | |
23 | struct commit_list *parents; | |
f2e6f1c9 | 24 | int parent_number = 1; |
bd321bcc JS |
25 | |
26 | if (!commit->object.parsed) | |
27 | parse_commit(commit); | |
28 | ||
29 | if (commit->date < cutoff) | |
30 | return; | |
31 | ||
32 | if (deref) { | |
33 | char *new_name = xmalloc(strlen(tip_name)+3); | |
34 | strcpy(new_name, tip_name); | |
35 | strcat(new_name, "^0"); | |
36 | tip_name = new_name; | |
37 | ||
38 | if (generation) | |
39 | die("generation: %d, but deref?", generation); | |
40 | } | |
41 | ||
42 | if (name == NULL) { | |
43 | name = xmalloc(sizeof(rev_name)); | |
44 | commit->object.util = name; | |
45 | goto copy_data; | |
46 | } else if (name->merge_traversals > merge_traversals || | |
47 | (name->merge_traversals == merge_traversals && | |
48 | name->generation > generation)) { | |
49 | copy_data: | |
50 | name->tip_name = tip_name; | |
51 | name->merge_traversals = merge_traversals; | |
52 | name->generation = generation; | |
53 | } else | |
54 | return; | |
55 | ||
56 | for (parents = commit->parents; | |
57 | parents; | |
58 | parents = parents->next, parent_number++) { | |
f2e6f1c9 | 59 | if (parent_number > 1) { |
bd321bcc JS |
60 | char *new_name = xmalloc(strlen(tip_name)+8); |
61 | ||
62 | if (generation > 0) | |
63 | sprintf(new_name, "%s~%d^%d", tip_name, | |
64 | generation, parent_number); | |
65 | else | |
66 | sprintf(new_name, "%s^%d", tip_name, parent_number); | |
67 | ||
68 | name_rev(parents->item, new_name, | |
69 | merge_traversals + 1 , 0, 0); | |
70 | } else { | |
71 | name_rev(parents->item, tip_name, merge_traversals, | |
72 | generation + 1, 0); | |
73 | } | |
74 | } | |
75 | } | |
76 | ||
77 | static int tags_only = 0; | |
78 | ||
79 | static int name_ref(const char *path, const unsigned char *sha1) | |
80 | { | |
81 | struct object *o = parse_object(sha1); | |
82 | int deref = 0; | |
83 | ||
84 | if (tags_only && strncmp(path, "refs/tags/", 10)) | |
85 | return 0; | |
86 | ||
87 | while (o && o->type == tag_type) { | |
88 | struct tag *t = (struct tag *) o; | |
89 | if (!t->tagged) | |
90 | break; /* broken repository */ | |
91 | o = parse_object(t->tagged->sha1); | |
92 | deref = 1; | |
93 | } | |
94 | if (o && o->type == commit_type) { | |
95 | struct commit *commit = (struct commit *)o; | |
bd321bcc | 96 | |
2c817df2 JH |
97 | if (!strncmp(path, "refs/heads/", 11)) |
98 | path = path + 11; | |
99 | else if (!strncmp(path, "refs/", 5)) | |
100 | path = path + 5; | |
bd321bcc JS |
101 | |
102 | name_rev(commit, strdup(path), 0, 0, deref); | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
107 | /* returns a static buffer */ | |
108 | static const char* get_rev_name(struct object *o) | |
109 | { | |
110 | static char buffer[1024]; | |
111 | struct rev_name *n = (struct rev_name *)o->util; | |
112 | if (!n) | |
113 | return "undefined"; | |
114 | ||
115 | if (!n->generation) | |
116 | return n->tip_name; | |
117 | ||
118 | snprintf(buffer, sizeof(buffer), "%s~%d", n->tip_name, n->generation); | |
119 | ||
120 | return buffer; | |
121 | } | |
122 | ||
123 | int main(int argc, char **argv) | |
124 | { | |
125 | struct object_list *revs = NULL; | |
126 | struct object_list **walker = &revs; | |
127 | int as_is = 0, all = 0, transform_stdin = 0; | |
128 | ||
129 | setup_git_directory(); | |
130 | ||
131 | if (argc < 2) | |
132 | usage(name_rev_usage); | |
133 | ||
134 | for (--argc, ++argv; argc; --argc, ++argv) { | |
135 | unsigned char sha1[20]; | |
136 | struct object *o; | |
137 | struct commit *commit; | |
138 | ||
139 | if (!as_is && (*argv)[0] == '-') { | |
140 | if (!strcmp(*argv, "--")) { | |
141 | as_is = 1; | |
142 | continue; | |
143 | } else if (!strcmp(*argv, "--tags")) { | |
144 | tags_only = 1; | |
145 | continue; | |
146 | } else if (!strcmp(*argv, "--all")) { | |
147 | if (argc > 1) | |
148 | die("Specify either a list, or --all, not both!"); | |
149 | all = 1; | |
150 | cutoff = 0; | |
151 | continue; | |
152 | } else if (!strcmp(*argv, "--stdin")) { | |
153 | if (argc > 1) | |
154 | die("Specify either a list, or --stdin, not both!"); | |
155 | transform_stdin = 1; | |
156 | cutoff = 0; | |
157 | continue; | |
158 | } | |
159 | usage(name_rev_usage); | |
160 | } | |
161 | ||
162 | if (get_sha1(*argv, sha1)) { | |
163 | fprintf(stderr, "Could not get sha1 for %s. Skipping.\n", | |
164 | *argv); | |
165 | continue; | |
166 | } | |
167 | ||
9534f40b | 168 | o = deref_tag(parse_object(sha1), *argv, 0); |
bd321bcc JS |
169 | if (!o || o->type != commit_type) { |
170 | fprintf(stderr, "Could not get commit for %s. Skipping.\n", | |
171 | *argv); | |
172 | continue; | |
173 | } | |
174 | ||
175 | commit = (struct commit *)o; | |
176 | ||
177 | if (cutoff > commit->date) | |
178 | cutoff = commit->date; | |
179 | ||
180 | object_list_append((struct object *)commit, walker); | |
181 | (*walker)->name = *argv; | |
182 | walker = &((*walker)->next); | |
183 | } | |
184 | ||
185 | for_each_ref(name_ref); | |
186 | ||
187 | if (transform_stdin) { | |
188 | char buffer[2048]; | |
189 | char *p, *p_start; | |
190 | ||
191 | while (!feof(stdin)) { | |
192 | int forty = 0; | |
193 | p = fgets(buffer, sizeof(buffer), stdin); | |
194 | if (!p) | |
195 | break; | |
196 | ||
197 | for (p_start = p; *p; p++) { | |
198 | #define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f')) | |
199 | if (!ishex(*p)) | |
200 | forty = 0; | |
201 | else if (++forty == 40 && | |
202 | !ishex(*(p+1))) { | |
203 | unsigned char sha1[40]; | |
204 | const char *name = "undefined"; | |
205 | char c = *(p+1); | |
206 | ||
207 | forty = 0; | |
208 | ||
209 | *(p+1) = 0; | |
210 | if (!get_sha1(p - 39, sha1)) { | |
211 | struct object *o = | |
212 | lookup_object(sha1); | |
213 | if (o) | |
214 | name = get_rev_name(o); | |
215 | } | |
216 | *(p+1) = c; | |
217 | ||
218 | if (!strcmp(name, "undefined")) | |
219 | continue; | |
220 | ||
2d76d0d1 JH |
221 | fwrite(p_start, p - p_start + 1, 1, |
222 | stdout); | |
223 | printf(" (%s)", name); | |
bd321bcc JS |
224 | p_start = p + 1; |
225 | } | |
226 | } | |
227 | ||
228 | /* flush */ | |
229 | if (p_start != p) | |
230 | fwrite(p_start, p - p_start, 1, stdout); | |
231 | } | |
232 | } else if (all) { | |
bd321bcc JS |
233 | int i; |
234 | ||
070879ca JS |
235 | for (i = 0; i < obj_allocs; i++) |
236 | if (objs[i]) | |
237 | printf("%s %s\n", sha1_to_hex(objs[i]->sha1), | |
238 | get_rev_name(objs[i])); | |
bd321bcc JS |
239 | } else |
240 | for ( ; revs; revs = revs->next) | |
241 | printf("%s %s\n", revs->name, get_rev_name(revs->item)); | |
242 | ||
243 | return 0; | |
244 | } | |
245 |