Merge branch 'js/filter'
[git] / builtin-name-rev.c
1 #include "builtin.h"
2 #include "cache.h"
3 #include "commit.h"
4 #include "tag.h"
5 #include "refs.h"
6
7 #define CUTOFF_DATE_SLOP 86400 /* one day */
8
9 static const char name_rev_usage[] =
10         "git-name-rev [--tags | --refs=<pattern>] ( --all | --stdin | committish [committish...] )\n";
11
12 typedef struct rev_name {
13         const char *tip_name;
14         int merge_traversals;
15         int generation;
16 } rev_name;
17
18 static long cutoff = LONG_MAX;
19
20 static void name_rev(struct commit *commit,
21                 const char *tip_name, int merge_traversals, int generation,
22                 int deref)
23 {
24         struct rev_name *name = (struct rev_name *)commit->util;
25         struct commit_list *parents;
26         int parent_number = 1;
27
28         if (!commit->object.parsed)
29                 parse_commit(commit);
30
31         if (commit->date < cutoff)
32                 return;
33
34         if (deref) {
35                 char *new_name = xmalloc(strlen(tip_name)+3);
36                 strcpy(new_name, tip_name);
37                 strcat(new_name, "^0");
38                 tip_name = new_name;
39
40                 if (generation)
41                         die("generation: %d, but deref?", generation);
42         }
43
44         if (name == NULL) {
45                 name = xmalloc(sizeof(rev_name));
46                 commit->util = name;
47                 goto copy_data;
48         } else if (name->merge_traversals > merge_traversals ||
49                         (name->merge_traversals == merge_traversals &&
50                          name->generation > generation)) {
51 copy_data:
52                 name->tip_name = tip_name;
53                 name->merge_traversals = merge_traversals;
54                 name->generation = generation;
55         } else
56                 return;
57
58         for (parents = commit->parents;
59                         parents;
60                         parents = parents->next, parent_number++) {
61                 if (parent_number > 1) {
62                         int len = strlen(tip_name);
63                         char *new_name = xmalloc(len +
64                                 1 + decimal_length(generation) +  /* ~<n> */
65                                 1 + 2 +                           /* ^NN */
66                                 1);
67
68                         if (len > 2 && !strcmp(tip_name + len - 2, "^0"))
69                                 len -= 2;
70                         if (generation > 0)
71                                 sprintf(new_name, "%.*s~%d^%d", len, tip_name,
72                                                 generation, parent_number);
73                         else
74                                 sprintf(new_name, "%.*s^%d", len, tip_name,
75                                                 parent_number);
76
77                         name_rev(parents->item, new_name,
78                                 merge_traversals + 1 , 0, 0);
79                 } else {
80                         name_rev(parents->item, tip_name, merge_traversals,
81                                 generation + 1, 0);
82                 }
83         }
84 }
85
86 struct name_ref_data {
87         int tags_only;
88         int name_only;
89         const char *ref_filter;
90 };
91
92 static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data)
93 {
94         struct object *o = parse_object(sha1);
95         struct name_ref_data *data = cb_data;
96         int deref = 0;
97
98         if (data->tags_only && prefixcmp(path, "refs/tags/"))
99                 return 0;
100
101         if (data->ref_filter && fnmatch(data->ref_filter, path, 0))
102                 return 0;
103
104         while (o && o->type == OBJ_TAG) {
105                 struct tag *t = (struct tag *) o;
106                 if (!t->tagged)
107                         break; /* broken repository */
108                 o = parse_object(t->tagged->sha1);
109                 deref = 1;
110         }
111         if (o && o->type == OBJ_COMMIT) {
112                 struct commit *commit = (struct commit *)o;
113
114                 if (!prefixcmp(path, "refs/heads/"))
115                         path = path + 11;
116                 else if (data->tags_only
117                     && data->name_only
118                     && !prefixcmp(path, "refs/tags/"))
119                         path = path + 10;
120                 else if (!prefixcmp(path, "refs/"))
121                         path = path + 5;
122
123                 name_rev(commit, xstrdup(path), 0, 0, deref);
124         }
125         return 0;
126 }
127
128 /* returns a static buffer */
129 static const char* get_rev_name(struct object *o)
130 {
131         static char buffer[1024];
132         struct rev_name *n;
133         struct commit *c;
134
135         if (o->type != OBJ_COMMIT)
136                 return "undefined";
137         c = (struct commit *) o;
138         n = c->util;
139         if (!n)
140                 return "undefined";
141
142         if (!n->generation)
143                 return n->tip_name;
144         else {
145                 int len = strlen(n->tip_name);
146                 if (len > 2 && !strcmp(n->tip_name + len - 2, "^0"))
147                         len -= 2;
148                 snprintf(buffer, sizeof(buffer), "%.*s~%d", len, n->tip_name,
149                                 n->generation);
150
151                 return buffer;
152         }
153 }
154
155 int cmd_name_rev(int argc, const char **argv, const char *prefix)
156 {
157         struct object_array revs = { 0, 0, NULL };
158         int as_is = 0, all = 0, transform_stdin = 0;
159         struct name_ref_data data = { 0, 0, NULL };
160
161         git_config(git_default_config);
162
163         if (argc < 2)
164                 usage(name_rev_usage);
165
166         for (--argc, ++argv; argc; --argc, ++argv) {
167                 unsigned char sha1[20];
168                 struct object *o;
169                 struct commit *commit;
170
171                 if (!as_is && (*argv)[0] == '-') {
172                         if (!strcmp(*argv, "--")) {
173                                 as_is = 1;
174                                 continue;
175                         } else if (!strcmp(*argv, "--name-only")) {
176                                 data.name_only = 1;
177                                 continue;
178                         } else if (!strcmp(*argv, "--tags")) {
179                                 data.tags_only = 1;
180                                 continue;
181                         } else  if (!prefixcmp(*argv, "--refs=")) {
182                                 data.ref_filter = *argv + 7;
183                                 continue;
184                         } else if (!strcmp(*argv, "--all")) {
185                                 if (argc > 1)
186                                         die("Specify either a list, or --all, not both!");
187                                 all = 1;
188                                 cutoff = 0;
189                                 continue;
190                         } else if (!strcmp(*argv, "--stdin")) {
191                                 if (argc > 1)
192                                         die("Specify either a list, or --stdin, not both!");
193                                 transform_stdin = 1;
194                                 cutoff = 0;
195                                 continue;
196                         }
197                         usage(name_rev_usage);
198                 }
199
200                 if (get_sha1(*argv, sha1)) {
201                         fprintf(stderr, "Could not get sha1 for %s. Skipping.\n",
202                                         *argv);
203                         continue;
204                 }
205
206                 o = deref_tag(parse_object(sha1), *argv, 0);
207                 if (!o || o->type != OBJ_COMMIT) {
208                         fprintf(stderr, "Could not get commit for %s. Skipping.\n",
209                                         *argv);
210                         continue;
211                 }
212
213                 commit = (struct commit *)o;
214
215                 if (cutoff > commit->date)
216                         cutoff = commit->date;
217
218                 add_object_array((struct object *)commit, *argv, &revs);
219         }
220
221         if (cutoff)
222                 cutoff = cutoff - CUTOFF_DATE_SLOP;
223         for_each_ref(name_ref, &data);
224
225         if (transform_stdin) {
226                 char buffer[2048];
227                 char *p, *p_start;
228
229                 while (!feof(stdin)) {
230                         int forty = 0;
231                         p = fgets(buffer, sizeof(buffer), stdin);
232                         if (!p)
233                                 break;
234
235                         for (p_start = p; *p; p++) {
236 #define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f'))
237                                 if (!ishex(*p))
238                                         forty = 0;
239                                 else if (++forty == 40 &&
240                                                 !ishex(*(p+1))) {
241                                         unsigned char sha1[40];
242                                         const char *name = "undefined";
243                                         char c = *(p+1);
244
245                                         forty = 0;
246
247                                         *(p+1) = 0;
248                                         if (!get_sha1(p - 39, sha1)) {
249                                                 struct object *o =
250                                                         lookup_object(sha1);
251                                                 if (o)
252                                                         name = get_rev_name(o);
253                                         }
254                                         *(p+1) = c;
255
256                                         if (!strcmp(name, "undefined"))
257                                                 continue;
258
259                                         fwrite(p_start, p - p_start + 1, 1,
260                                                stdout);
261                                         printf(" (%s)", name);
262                                         p_start = p + 1;
263                                 }
264                         }
265
266                         /* flush */
267                         if (p_start != p)
268                                 fwrite(p_start, p - p_start, 1, stdout);
269                 }
270         } else if (all) {
271                 int i, max;
272
273                 max = get_max_object_index();
274                 for (i = 0; i < max; i++) {
275                         struct object * obj = get_indexed_object(i);
276                         if (!obj)
277                                 continue;
278                         if (!data.name_only)
279                                 printf("%s ", sha1_to_hex(obj->sha1));
280                         printf("%s\n", get_rev_name(obj));
281                 }
282         } else {
283                 int i;
284                 for (i = 0; i < revs.nr; i++) {
285                         if (!data.name_only)
286                                 printf("%s ", revs.objects[i].name);
287                         printf("%s\n", get_rev_name(revs.objects[i].item));
288                 }
289         }
290
291         return 0;
292 }