Code

i18n: git-am eval_gettext messages
[git.git] / reflog-walk.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "refs.h"
4 #include "diff.h"
5 #include "revision.h"
6 #include "string-list.h"
7 #include "reflog-walk.h"
9 struct complete_reflogs {
10         char *ref;
11         const char *short_ref;
12         struct reflog_info {
13                 unsigned char osha1[20], nsha1[20];
14                 char *email;
15                 unsigned long timestamp;
16                 int tz;
17                 char *message;
18         } *items;
19         int nr, alloc;
20 };
22 static int read_one_reflog(unsigned char *osha1, unsigned char *nsha1,
23                 const char *email, unsigned long timestamp, int tz,
24                 const char *message, void *cb_data)
25 {
26         struct complete_reflogs *array = cb_data;
27         struct reflog_info *item;
29         if (array->nr >= array->alloc) {
30                 array->alloc = alloc_nr(array->nr + 1);
31                 array->items = xrealloc(array->items, array->alloc *
32                         sizeof(struct reflog_info));
33         }
34         item = array->items + array->nr;
35         memcpy(item->osha1, osha1, 20);
36         memcpy(item->nsha1, nsha1, 20);
37         item->email = xstrdup(email);
38         item->timestamp = timestamp;
39         item->tz = tz;
40         item->message = xstrdup(message);
41         array->nr++;
42         return 0;
43 }
45 static struct complete_reflogs *read_complete_reflog(const char *ref)
46 {
47         struct complete_reflogs *reflogs =
48                 xcalloc(sizeof(struct complete_reflogs), 1);
49         reflogs->ref = xstrdup(ref);
50         for_each_reflog_ent(ref, read_one_reflog, reflogs);
51         if (reflogs->nr == 0) {
52                 unsigned char sha1[20];
53                 const char *name = resolve_ref(ref, sha1, 1, NULL);
54                 if (name)
55                         for_each_reflog_ent(name, read_one_reflog, reflogs);
56         }
57         if (reflogs->nr == 0) {
58                 int len = strlen(ref);
59                 char *refname = xmalloc(len + 12);
60                 sprintf(refname, "refs/%s", ref);
61                 for_each_reflog_ent(refname, read_one_reflog, reflogs);
62                 if (reflogs->nr == 0) {
63                         sprintf(refname, "refs/heads/%s", ref);
64                         for_each_reflog_ent(refname, read_one_reflog, reflogs);
65                 }
66                 free(refname);
67         }
68         return reflogs;
69 }
71 static int get_reflog_recno_by_time(struct complete_reflogs *array,
72         unsigned long timestamp)
73 {
74         int i;
75         for (i = array->nr - 1; i >= 0; i--)
76                 if (timestamp >= array->items[i].timestamp)
77                         return i;
78         return -1;
79 }
81 struct commit_info_lifo {
82         struct commit_info {
83                 struct commit *commit;
84                 void *util;
85         } *items;
86         int nr, alloc;
87 };
89 static struct commit_info *get_commit_info(struct commit *commit,
90                 struct commit_info_lifo *lifo, int pop)
91 {
92         int i;
93         for (i = 0; i < lifo->nr; i++)
94                 if (lifo->items[i].commit == commit) {
95                         struct commit_info *result = &lifo->items[i];
96                         if (pop) {
97                                 if (i + 1 < lifo->nr)
98                                         memmove(lifo->items + i,
99                                                 lifo->items + i + 1,
100                                                 (lifo->nr - i) *
101                                                 sizeof(struct commit_info));
102                                 lifo->nr--;
103                         }
104                         return result;
105                 }
106         return NULL;
109 static void add_commit_info(struct commit *commit, void *util,
110                 struct commit_info_lifo *lifo)
112         struct commit_info *info;
113         if (lifo->nr >= lifo->alloc) {
114                 lifo->alloc = alloc_nr(lifo->nr + 1);
115                 lifo->items = xrealloc(lifo->items,
116                         lifo->alloc * sizeof(struct commit_info));
117         }
118         info = lifo->items + lifo->nr;
119         info->commit = commit;
120         info->util = util;
121         lifo->nr++;
124 struct commit_reflog {
125         int flag, recno;
126         struct complete_reflogs *reflogs;
127 };
129 struct reflog_walk_info {
130         struct commit_info_lifo reflogs;
131         struct string_list complete_reflogs;
132         struct commit_reflog *last_commit_reflog;
133 };
135 void init_reflog_walk(struct reflog_walk_info** info)
137         *info = xcalloc(sizeof(struct reflog_walk_info), 1);
140 int add_reflog_for_walk(struct reflog_walk_info *info,
141                 struct commit *commit, const char *name)
143         unsigned long timestamp = 0;
144         int recno = -1;
145         struct string_list_item *item;
146         struct complete_reflogs *reflogs;
147         char *branch, *at = strchr(name, '@');
148         struct commit_reflog *commit_reflog;
150         if (commit->object.flags & UNINTERESTING)
151                 die ("Cannot walk reflogs for %s", name);
153         branch = xstrdup(name);
154         if (at && at[1] == '{') {
155                 char *ep;
156                 branch[at - name] = '\0';
157                 recno = strtoul(at + 2, &ep, 10);
158                 if (*ep != '}') {
159                         recno = -1;
160                         timestamp = approxidate(at + 2);
161                 }
162         } else
163                 recno = 0;
165         item = string_list_lookup(&info->complete_reflogs, branch);
166         if (item)
167                 reflogs = item->util;
168         else {
169                 if (*branch == '\0') {
170                         unsigned char sha1[20];
171                         const char *head = resolve_ref("HEAD", sha1, 0, NULL);
172                         if (!head)
173                                 die ("No current branch");
174                         free(branch);
175                         branch = xstrdup(head);
176                 }
177                 reflogs = read_complete_reflog(branch);
178                 if (!reflogs || reflogs->nr == 0) {
179                         unsigned char sha1[20];
180                         char *b;
181                         if (dwim_log(branch, strlen(branch), sha1, &b) == 1) {
182                                 if (reflogs) {
183                                         free(reflogs->ref);
184                                         free(reflogs);
185                                 }
186                                 free(branch);
187                                 branch = b;
188                                 reflogs = read_complete_reflog(branch);
189                         }
190                 }
191                 if (!reflogs || reflogs->nr == 0)
192                         return -1;
193                 string_list_insert(&info->complete_reflogs, branch)->util
194                         = reflogs;
195         }
197         commit_reflog = xcalloc(sizeof(struct commit_reflog), 1);
198         if (recno < 0) {
199                 commit_reflog->flag = 1;
200                 commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
201                 if (commit_reflog->recno < 0) {
202                         free(branch);
203                         free(commit_reflog);
204                         return -1;
205                 }
206         } else
207                 commit_reflog->recno = reflogs->nr - recno - 1;
208         commit_reflog->reflogs = reflogs;
210         add_commit_info(commit, commit_reflog, &info->reflogs);
211         return 0;
214 void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
216         struct commit_info *commit_info =
217                 get_commit_info(commit, &info->reflogs, 0);
218         struct commit_reflog *commit_reflog;
219         struct reflog_info *reflog;
221         info->last_commit_reflog = NULL;
222         if (!commit_info)
223                 return;
225         commit_reflog = commit_info->util;
226         if (commit_reflog->recno < 0) {
227                 commit->parents = NULL;
228                 return;
229         }
231         reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
232         info->last_commit_reflog = commit_reflog;
233         commit_reflog->recno--;
234         commit_info->commit = (struct commit *)parse_object(reflog->osha1);
235         if (!commit_info->commit) {
236                 commit->parents = NULL;
237                 return;
238         }
240         commit->parents = xcalloc(sizeof(struct commit_list), 1);
241         commit->parents->item = commit_info->commit;
244 void get_reflog_selector(struct strbuf *sb,
245                          struct reflog_walk_info *reflog_info,
246                          enum date_mode dmode,
247                          int shorten)
249         struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
250         struct reflog_info *info;
251         const char *printed_ref;
253         if (!commit_reflog)
254                 return;
256         if (shorten) {
257                 if (!commit_reflog->reflogs->short_ref)
258                         commit_reflog->reflogs->short_ref
259                                 = shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
260                 printed_ref = commit_reflog->reflogs->short_ref;
261         } else {
262                 printed_ref = commit_reflog->reflogs->ref;
263         }
265         strbuf_addf(sb, "%s@{", printed_ref);
266         if (commit_reflog->flag || dmode) {
267                 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
268                 strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
269         } else {
270                 strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
271                             - 2 - commit_reflog->recno);
272         }
274         strbuf_addch(sb, '}');
277 void get_reflog_message(struct strbuf *sb,
278                         struct reflog_walk_info *reflog_info)
280         struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
281         struct reflog_info *info;
282         size_t len;
284         if (!commit_reflog)
285                 return;
287         info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
288         len = strlen(info->message);
289         if (len > 0)
290                 len--; /* strip away trailing newline */
291         strbuf_add(sb, info->message, len);
294 void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
295         enum date_mode dmode)
297         if (reflog_info && reflog_info->last_commit_reflog) {
298                 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
299                 struct reflog_info *info;
300                 struct strbuf selector = STRBUF_INIT;
302                 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
303                 get_reflog_selector(&selector, reflog_info, dmode, 0);
304                 if (oneline) {
305                         printf("%s: %s", selector.buf, info->message);
306                 }
307                 else {
308                         printf("Reflog: %s (%s)\nReflog message: %s",
309                                selector.buf, info->email, info->message);
310                 }
312                 strbuf_release(&selector);
313         }