freshlybakedca.ke
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1#define USE_THE_REPOSITORY_VARIABLE
2
3#include "git-compat-util.h"
4#include "commit.h"
5#include "refs.h"
6#include "diff.h"
7#include "repository.h"
8#include "revision.h"
9#include "string-list.h"
10#include "reflog-walk.h"
11
12struct complete_reflogs {
13 char *ref;
14 char *short_ref;
15 struct reflog_info {
16 struct object_id ooid, noid;
17 char *email;
18 timestamp_t timestamp;
19 int tz;
20 char *message;
21 } *items;
22 int nr, alloc;
23};
24
25static int read_one_reflog(const char *refname UNUSED,
26 struct object_id *ooid, struct object_id *noid,
27 const char *email, timestamp_t timestamp, int tz,
28 const char *message, void *cb_data)
29{
30 struct complete_reflogs *array = cb_data;
31 struct reflog_info *item;
32
33 ALLOC_GROW(array->items, array->nr + 1, array->alloc);
34 item = array->items + array->nr;
35 oidcpy(&item->ooid, ooid);
36 oidcpy(&item->noid, noid);
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}
44
45static void free_complete_reflog(struct complete_reflogs *array)
46{
47 int i;
48
49 if (!array)
50 return;
51
52 for (i = 0; i < array->nr; i++) {
53 free(array->items[i].email);
54 free(array->items[i].message);
55 }
56 free(array->items);
57 free(array->ref);
58 free(array->short_ref);
59 free(array);
60}
61
62static void complete_reflogs_clear(void *util, const char *str UNUSED)
63{
64 struct complete_reflogs *array = util;
65 free_complete_reflog(array);
66}
67
68static struct complete_reflogs *read_complete_reflog(const char *ref)
69{
70 struct complete_reflogs *reflogs =
71 xcalloc(1, sizeof(struct complete_reflogs));
72 reflogs->ref = xstrdup(ref);
73 refs_for_each_reflog_ent(get_main_ref_store(the_repository), ref,
74 read_one_reflog, reflogs);
75 if (reflogs->nr == 0) {
76 const char *name;
77 void *name_to_free;
78 name = name_to_free = refs_resolve_refdup(get_main_ref_store(the_repository),
79 ref,
80 RESOLVE_REF_READING,
81 NULL, NULL);
82 if (name) {
83 refs_for_each_reflog_ent(get_main_ref_store(the_repository),
84 name, read_one_reflog,
85 reflogs);
86 free(name_to_free);
87 }
88 }
89 if (reflogs->nr == 0) {
90 char *refname = xstrfmt("refs/%s", ref);
91 refs_for_each_reflog_ent(get_main_ref_store(the_repository),
92 refname, read_one_reflog, reflogs);
93 if (reflogs->nr == 0) {
94 free(refname);
95 refname = xstrfmt("refs/heads/%s", ref);
96 refs_for_each_reflog_ent(get_main_ref_store(the_repository),
97 refname, read_one_reflog,
98 reflogs);
99 }
100 free(refname);
101 }
102 return reflogs;
103}
104
105static int get_reflog_recno_by_time(struct complete_reflogs *array,
106 timestamp_t timestamp)
107{
108 int i;
109 for (i = array->nr - 1; i >= 0; i--)
110 if (timestamp >= array->items[i].timestamp)
111 return i;
112 return -1;
113}
114
115struct commit_reflog {
116 int recno;
117 enum selector_type {
118 SELECTOR_NONE,
119 SELECTOR_INDEX,
120 SELECTOR_DATE
121 } selector;
122 struct complete_reflogs *reflogs;
123};
124
125struct reflog_walk_info {
126 struct commit_reflog **logs;
127 size_t nr, alloc;
128 struct string_list complete_reflogs;
129 struct commit_reflog *last_commit_reflog;
130};
131
132void init_reflog_walk(struct reflog_walk_info **info)
133{
134 CALLOC_ARRAY(*info, 1);
135 (*info)->complete_reflogs.strdup_strings = 1;
136}
137
138void reflog_walk_info_release(struct reflog_walk_info *info)
139{
140 size_t i;
141
142 if (!info)
143 return;
144
145 for (i = 0; i < info->nr; i++)
146 free(info->logs[i]);
147 string_list_clear_func(&info->complete_reflogs,
148 complete_reflogs_clear);
149 free(info->logs);
150 free(info);
151}
152
153int add_reflog_for_walk(struct reflog_walk_info *info,
154 struct commit *commit, const char *name)
155{
156 timestamp_t timestamp = 0;
157 int recno = -1;
158 struct string_list_item *item;
159 struct complete_reflogs *reflogs;
160 char *branch, *at = strchr(name, '@');
161 struct commit_reflog *commit_reflog;
162 enum selector_type selector = SELECTOR_NONE;
163
164 if (commit->object.flags & UNINTERESTING)
165 die("cannot walk reflogs for %s", name);
166
167 branch = xstrdup(name);
168 if (at && at[1] == '{') {
169 char *ep;
170 branch[at - name] = '\0';
171 recno = strtoul(at + 2, &ep, 10);
172 if (*ep != '}') {
173 recno = -1;
174 timestamp = approxidate(at + 2);
175 selector = SELECTOR_DATE;
176 }
177 else
178 selector = SELECTOR_INDEX;
179 } else
180 recno = 0;
181
182 item = string_list_lookup(&info->complete_reflogs, branch);
183 if (item)
184 reflogs = item->util;
185 else {
186 if (*branch == '\0') {
187 free(branch);
188 branch = refs_resolve_refdup(get_main_ref_store(the_repository),
189 "HEAD", 0, NULL, NULL);
190 if (!branch)
191 die("no current branch");
192
193 }
194 reflogs = read_complete_reflog(branch);
195 if (!reflogs || reflogs->nr == 0) {
196 char *b;
197 int ret = repo_dwim_log(the_repository, branch, strlen(branch),
198 NULL, &b);
199 if (ret > 1)
200 free(b);
201 else if (ret == 1) {
202 free_complete_reflog(reflogs);
203 free(branch);
204 branch = b;
205 reflogs = read_complete_reflog(branch);
206 }
207 }
208 if (!reflogs || reflogs->nr == 0) {
209 free_complete_reflog(reflogs);
210 free(branch);
211 return -1;
212 }
213 string_list_insert(&info->complete_reflogs, branch)->util
214 = reflogs;
215 }
216 free(branch);
217
218 CALLOC_ARRAY(commit_reflog, 1);
219 if (recno < 0) {
220 commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
221 if (commit_reflog->recno < 0) {
222 free(commit_reflog);
223 return -1;
224 }
225 } else
226 commit_reflog->recno = reflogs->nr - recno - 1;
227 commit_reflog->selector = selector;
228 commit_reflog->reflogs = reflogs;
229
230 ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
231 info->logs[info->nr++] = commit_reflog;
232
233 return 0;
234}
235
236void get_reflog_selector(struct strbuf *sb,
237 struct reflog_walk_info *reflog_info,
238 struct date_mode dmode, int force_date,
239 int shorten)
240{
241 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
242 struct reflog_info *info;
243 const char *printed_ref;
244
245 if (!commit_reflog)
246 return;
247
248 if (shorten) {
249 if (!commit_reflog->reflogs->short_ref)
250 commit_reflog->reflogs->short_ref
251 = refs_shorten_unambiguous_ref(get_main_ref_store(the_repository),
252 commit_reflog->reflogs->ref,
253 0);
254 printed_ref = commit_reflog->reflogs->short_ref;
255 } else {
256 printed_ref = commit_reflog->reflogs->ref;
257 }
258
259 strbuf_addf(sb, "%s@{", printed_ref);
260 if (commit_reflog->selector == SELECTOR_DATE ||
261 (commit_reflog->selector == SELECTOR_NONE && force_date)) {
262 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
263 strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
264 } else {
265 strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
266 - 2 - commit_reflog->recno);
267 }
268
269 strbuf_addch(sb, '}');
270}
271
272void get_reflog_message(struct strbuf *sb,
273 struct reflog_walk_info *reflog_info)
274{
275 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
276 struct reflog_info *info;
277 size_t len;
278
279 if (!commit_reflog)
280 return;
281
282 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
283 len = strlen(info->message);
284 if (len > 0)
285 len--; /* strip away trailing newline */
286 strbuf_add(sb, info->message, len);
287}
288
289const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
290{
291 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
292 struct reflog_info *info;
293
294 if (!commit_reflog)
295 return NULL;
296
297 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
298 return info->email;
299}
300
301timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
302{
303 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
304 struct reflog_info *info;
305
306 if (!commit_reflog)
307 return 0;
308
309 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
310 return info->timestamp;
311}
312
313void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
314 struct date_mode dmode, int force_date)
315{
316 if (reflog_info && reflog_info->last_commit_reflog) {
317 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
318 struct reflog_info *info;
319 struct strbuf selector = STRBUF_INIT;
320
321 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
322 get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
323 if (oneline) {
324 printf("%s: %s", selector.buf, info->message);
325 }
326 else {
327 printf("Reflog: %s (%s)\nReflog message: %s",
328 selector.buf, info->email, info->message);
329 }
330
331 strbuf_release(&selector);
332 }
333}
334
335int reflog_walk_empty(struct reflog_walk_info *info)
336{
337 return !info || !info->nr;
338}
339
340static struct commit *next_reflog_commit(struct commit_reflog *log)
341{
342 for (; log->recno >= 0; log->recno--) {
343 struct reflog_info *entry = &log->reflogs->items[log->recno];
344 struct object *obj = parse_object(the_repository,
345 &entry->noid);
346
347 if (obj && obj->type == OBJ_COMMIT)
348 return (struct commit *)obj;
349 }
350 return NULL;
351}
352
353static timestamp_t log_timestamp(struct commit_reflog *log)
354{
355 return log->reflogs->items[log->recno].timestamp;
356}
357
358struct commit *next_reflog_entry(struct reflog_walk_info *walk)
359{
360 struct commit_reflog *best = NULL;
361 struct commit *best_commit = NULL;
362 size_t i;
363
364 for (i = 0; i < walk->nr; i++) {
365 struct commit_reflog *log = walk->logs[i];
366 struct commit *commit = next_reflog_commit(log);
367
368 if (!commit)
369 continue;
370
371 if (!best || log_timestamp(log) > log_timestamp(best)) {
372 best = log;
373 best_commit = commit;
374 }
375 }
376
377 if (best) {
378 best->recno--;
379 walk->last_commit_reflog = best;
380 return best_commit;
381 }
382
383 return NULL;
384}