Merge branch 'maint'
[git/jnareb-git.git] / builtin-name-rev.c
blobc022224361b62b527aca7822920ac8ea896ae585
1 #include "builtin.h"
2 #include "cache.h"
3 #include "commit.h"
4 #include "tag.h"
5 #include "refs.h"
7 static const char name_rev_usage[] =
8 "git-name-rev [--tags | --refs=<pattern>] ( --all | --stdin | committish [committish...] )\n";
10 typedef struct rev_name {
11 const char *tip_name;
12 int merge_traversals;
13 int generation;
14 } rev_name;
16 static long cutoff = LONG_MAX;
18 static void name_rev(struct commit *commit,
19 const char *tip_name, int merge_traversals, int generation,
20 int deref)
22 struct rev_name *name = (struct rev_name *)commit->util;
23 struct commit_list *parents;
24 int parent_number = 1;
26 if (!commit->object.parsed)
27 parse_commit(commit);
29 if (commit->date < cutoff)
30 return;
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;
38 if (generation)
39 die("generation: %d, but deref?", generation);
42 if (name == NULL) {
43 name = xmalloc(sizeof(rev_name));
44 commit->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;
56 for (parents = commit->parents;
57 parents;
58 parents = parents->next, parent_number++) {
59 if (parent_number > 1) {
60 int len = strlen(tip_name);
61 char *new_name = xmalloc(len + 8);
63 if (len > 2 && !strcmp(tip_name + len - 2, "^0"))
64 len -= 2;
65 if (generation > 0)
66 sprintf(new_name, "%.*s~%d^%d", len, tip_name,
67 generation, parent_number);
68 else
69 sprintf(new_name, "%.*s^%d", len, tip_name,
70 parent_number);
72 name_rev(parents->item, new_name,
73 merge_traversals + 1 , 0, 0);
74 } else {
75 name_rev(parents->item, tip_name, merge_traversals,
76 generation + 1, 0);
81 struct name_ref_data {
82 int tags_only;
83 const char *ref_filter;
86 static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data)
88 struct object *o = parse_object(sha1);
89 struct name_ref_data *data = cb_data;
90 int deref = 0;
92 if (data->tags_only && prefixcmp(path, "refs/tags/"))
93 return 0;
95 if (data->ref_filter && fnmatch(data->ref_filter, path, 0))
96 return 0;
98 while (o && o->type == OBJ_TAG) {
99 struct tag *t = (struct tag *) o;
100 if (!t->tagged)
101 break; /* broken repository */
102 o = parse_object(t->tagged->sha1);
103 deref = 1;
105 if (o && o->type == OBJ_COMMIT) {
106 struct commit *commit = (struct commit *)o;
108 if (!prefixcmp(path, "refs/heads/"))
109 path = path + 11;
110 else if (!prefixcmp(path, "refs/"))
111 path = path + 5;
113 name_rev(commit, xstrdup(path), 0, 0, deref);
115 return 0;
118 /* returns a static buffer */
119 static const char* get_rev_name(struct object *o)
121 static char buffer[1024];
122 struct rev_name *n;
123 struct commit *c;
125 if (o->type != OBJ_COMMIT)
126 return "undefined";
127 c = (struct commit *) o;
128 n = c->util;
129 if (!n)
130 return "undefined";
132 if (!n->generation)
133 return n->tip_name;
134 else {
135 int len = strlen(n->tip_name);
136 if (len > 2 && !strcmp(n->tip_name + len - 2, "^0"))
137 len -= 2;
138 snprintf(buffer, sizeof(buffer), "%.*s~%d", len, n->tip_name,
139 n->generation);
141 return buffer;
145 int cmd_name_rev(int argc, const char **argv, const char *prefix)
147 struct object_array revs = { 0, 0, NULL };
148 int as_is = 0, all = 0, transform_stdin = 0;
149 struct name_ref_data data = { 0, NULL };
151 git_config(git_default_config);
153 if (argc < 2)
154 usage(name_rev_usage);
156 for (--argc, ++argv; argc; --argc, ++argv) {
157 unsigned char sha1[20];
158 struct object *o;
159 struct commit *commit;
161 if (!as_is && (*argv)[0] == '-') {
162 if (!strcmp(*argv, "--")) {
163 as_is = 1;
164 continue;
165 } else if (!strcmp(*argv, "--tags")) {
166 data.tags_only = 1;
167 continue;
168 } else if (!prefixcmp(*argv, "--refs=")) {
169 data.ref_filter = *argv + 7;
170 continue;
171 } else if (!strcmp(*argv, "--all")) {
172 if (argc > 1)
173 die("Specify either a list, or --all, not both!");
174 all = 1;
175 cutoff = 0;
176 continue;
177 } else if (!strcmp(*argv, "--stdin")) {
178 if (argc > 1)
179 die("Specify either a list, or --stdin, not both!");
180 transform_stdin = 1;
181 cutoff = 0;
182 continue;
184 usage(name_rev_usage);
187 if (get_sha1(*argv, sha1)) {
188 fprintf(stderr, "Could not get sha1 for %s. Skipping.\n",
189 *argv);
190 continue;
193 o = deref_tag(parse_object(sha1), *argv, 0);
194 if (!o || o->type != OBJ_COMMIT) {
195 fprintf(stderr, "Could not get commit for %s. Skipping.\n",
196 *argv);
197 continue;
200 commit = (struct commit *)o;
202 if (cutoff > commit->date)
203 cutoff = commit->date;
205 add_object_array((struct object *)commit, *argv, &revs);
208 for_each_ref(name_ref, &data);
210 if (transform_stdin) {
211 char buffer[2048];
212 char *p, *p_start;
214 while (!feof(stdin)) {
215 int forty = 0;
216 p = fgets(buffer, sizeof(buffer), stdin);
217 if (!p)
218 break;
220 for (p_start = p; *p; p++) {
221 #define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f'))
222 if (!ishex(*p))
223 forty = 0;
224 else if (++forty == 40 &&
225 !ishex(*(p+1))) {
226 unsigned char sha1[40];
227 const char *name = "undefined";
228 char c = *(p+1);
230 forty = 0;
232 *(p+1) = 0;
233 if (!get_sha1(p - 39, sha1)) {
234 struct object *o =
235 lookup_object(sha1);
236 if (o)
237 name = get_rev_name(o);
239 *(p+1) = c;
241 if (!strcmp(name, "undefined"))
242 continue;
244 fwrite(p_start, p - p_start + 1, 1,
245 stdout);
246 printf(" (%s)", name);
247 p_start = p + 1;
251 /* flush */
252 if (p_start != p)
253 fwrite(p_start, p - p_start, 1, stdout);
255 } else if (all) {
256 int i, max;
258 max = get_max_object_index();
259 for (i = 0; i < max; i++) {
260 struct object * obj = get_indexed_object(i);
261 if (!obj)
262 continue;
263 printf("%s %s\n", sha1_to_hex(obj->sha1), get_rev_name(obj));
265 } else {
266 int i;
267 for (i = 0; i < revs.nr; i++)
268 printf("%s %s\n",
269 revs.objects[i].name,
270 get_rev_name(revs.objects[i].item));
273 return 0;