Merge branch 'js/gitdir-at-unc-root'
[git/git.git] / reflog-walk.c
CommitLineData
8860fd42
JS
1#include "cache.h"
2#include "commit.h"
3#include "refs.h"
4#include "diff.h"
5#include "revision.h"
c455c87c 6#include "string-list.h"
53645a3a 7#include "reflog-walk.h"
8860fd42
JS
8
9struct complete_reflogs {
10 char *ref;
8f8f5476 11 const char *short_ref;
8860fd42 12 struct reflog_info {
8ebc3fd0 13 struct object_id ooid, noid;
8860fd42 14 char *email;
dddbad72 15 timestamp_t timestamp;
8860fd42
JS
16 int tz;
17 char *message;
18 } *items;
19 int nr, alloc;
20};
21
9461d272 22static int read_one_reflog(struct object_id *ooid, struct object_id *noid,
dddbad72 23 const char *email, timestamp_t timestamp, int tz,
8860fd42
JS
24 const char *message, void *cb_data)
25{
26 struct complete_reflogs *array = cb_data;
27 struct reflog_info *item;
28
6647cc26 29 ALLOC_GROW(array->items, array->nr + 1, array->alloc);
8860fd42 30 item = array->items + array->nr;
9461d272 31 oidcpy(&item->ooid, ooid);
32 oidcpy(&item->noid, noid);
8860fd42
JS
33 item->email = xstrdup(email);
34 item->timestamp = timestamp;
35 item->tz = tz;
36 item->message = xstrdup(message);
37 array->nr++;
38 return 0;
39}
40
e30d463d
JK
41static void free_complete_reflog(struct complete_reflogs *array)
42{
43 int i;
44
45 if (!array)
46 return;
47
48 for (i = 0; i < array->nr; i++) {
49 free(array->items[i].email);
50 free(array->items[i].message);
51 }
52 free(array->items);
53 free(array->ref);
54 free(array);
55}
56
8860fd42
JS
57static struct complete_reflogs *read_complete_reflog(const char *ref)
58{
59 struct complete_reflogs *reflogs =
8e1aa2f7 60 xcalloc(1, sizeof(struct complete_reflogs));
8860fd42
JS
61 reflogs->ref = xstrdup(ref);
62 for_each_reflog_ent(ref, read_one_reflog, reflogs);
63 if (reflogs->nr == 0) {
96ec7b1e
NTND
64 const char *name;
65 void *name_to_free;
7695d118 66 name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
efbd4fdf 67 NULL, NULL);
d5a35c11 68 if (name) {
8860fd42 69 for_each_reflog_ent(name, read_one_reflog, reflogs);
96ec7b1e 70 free(name_to_free);
d5a35c11 71 }
8860fd42
JS
72 }
73 if (reflogs->nr == 0) {
75faa45a 74 char *refname = xstrfmt("refs/%s", ref);
8860fd42
JS
75 for_each_reflog_ent(refname, read_one_reflog, reflogs);
76 if (reflogs->nr == 0) {
75faa45a
JK
77 free(refname);
78 refname = xstrfmt("refs/heads/%s", ref);
8860fd42
JS
79 for_each_reflog_ent(refname, read_one_reflog, reflogs);
80 }
81 free(refname);
82 }
83 return reflogs;
84}
85
86static int get_reflog_recno_by_time(struct complete_reflogs *array,
dddbad72 87 timestamp_t timestamp)
8860fd42
JS
88{
89 int i;
40ab7c33 90 for (i = array->nr - 1; i >= 0; i--)
8860fd42
JS
91 if (timestamp >= array->items[i].timestamp)
92 return i;
93 return -1;
94}
95
8860fd42 96struct commit_reflog {
a763126b
JK
97 int recno;
98 enum selector_type {
99 SELECTOR_NONE,
100 SELECTOR_INDEX,
101 SELECTOR_DATE
102 } selector;
8860fd42
JS
103 struct complete_reflogs *reflogs;
104};
105
106struct reflog_walk_info {
d08565bf
JK
107 struct commit_reflog **logs;
108 size_t nr, alloc;
c455c87c 109 struct string_list complete_reflogs;
8860fd42
JS
110 struct commit_reflog *last_commit_reflog;
111};
112
24d36f14 113void init_reflog_walk(struct reflog_walk_info **info)
8860fd42 114{
8e1aa2f7 115 *info = xcalloc(1, sizeof(struct reflog_walk_info));
75afe7ac 116 (*info)->complete_reflogs.strdup_strings = 1;
8860fd42
JS
117}
118
7b69b873 119int add_reflog_for_walk(struct reflog_walk_info *info,
8860fd42
JS
120 struct commit *commit, const char *name)
121{
dddbad72 122 timestamp_t timestamp = 0;
8860fd42 123 int recno = -1;
c455c87c 124 struct string_list_item *item;
8860fd42
JS
125 struct complete_reflogs *reflogs;
126 char *branch, *at = strchr(name, '@');
127 struct commit_reflog *commit_reflog;
a763126b 128 enum selector_type selector = SELECTOR_NONE;
8860fd42 129
db055e65 130 if (commit->object.flags & UNINTERESTING)
1a07e59c 131 die("cannot walk reflogs for %s", name);
db055e65 132
8860fd42
JS
133 branch = xstrdup(name);
134 if (at && at[1] == '{') {
135 char *ep;
136 branch[at - name] = '\0';
137 recno = strtoul(at + 2, &ep, 10);
138 if (*ep != '}') {
139 recno = -1;
140 timestamp = approxidate(at + 2);
a763126b 141 selector = SELECTOR_DATE;
8860fd42 142 }
a763126b
JK
143 else
144 selector = SELECTOR_INDEX;
8860fd42
JS
145 } else
146 recno = 0;
147
e8c8b713 148 item = string_list_lookup(&info->complete_reflogs, branch);
8860fd42
JS
149 if (item)
150 reflogs = item->util;
151 else {
d271fd53 152 if (*branch == '\0') {
d271fd53 153 free(branch);
efbd4fdf 154 branch = resolve_refdup("HEAD", 0, NULL, NULL);
96ec7b1e 155 if (!branch)
1a07e59c 156 die("no current branch");
96ec7b1e 157
d271fd53 158 }
8860fd42 159 reflogs = read_complete_reflog(branch);
eb3a4822 160 if (!reflogs || reflogs->nr == 0) {
2928325f 161 struct object_id oid;
eb3a4822 162 char *b;
5026b471 163 int ret = dwim_log(branch, strlen(branch),
334dc52f 164 &oid, &b);
5026b471
JS
165 if (ret > 1)
166 free(b);
167 else if (ret == 1) {
e30d463d 168 free_complete_reflog(reflogs);
eb3a4822
JS
169 free(branch);
170 branch = b;
171 reflogs = read_complete_reflog(branch);
172 }
173 }
5026b471 174 if (!reflogs || reflogs->nr == 0) {
e30d463d 175 free_complete_reflog(reflogs);
5026b471 176 free(branch);
7b69b873 177 return -1;
5026b471 178 }
78a395d3 179 string_list_insert(&info->complete_reflogs, branch)->util
8860fd42
JS
180 = reflogs;
181 }
5026b471 182 free(branch);
8860fd42 183
8e1aa2f7 184 commit_reflog = xcalloc(1, sizeof(struct commit_reflog));
8860fd42 185 if (recno < 0) {
8860fd42
JS
186 commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
187 if (commit_reflog->recno < 0) {
8860fd42 188 free(commit_reflog);
7b69b873 189 return -1;
8860fd42
JS
190 }
191 } else
192 commit_reflog->recno = reflogs->nr - recno - 1;
a763126b 193 commit_reflog->selector = selector;
8860fd42
JS
194 commit_reflog->reflogs = reflogs;
195
d08565bf
JK
196 ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
197 info->logs[info->nr++] = commit_reflog;
8860fd42 198
d08565bf 199 return 0;
8860fd42
JS
200}
201
72b103fe
TR
202void get_reflog_selector(struct strbuf *sb,
203 struct reflog_walk_info *reflog_info,
a5481a6c 204 const struct date_mode *dmode, int force_date,
8f8f5476 205 int shorten)
72b103fe
TR
206{
207 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
208 struct reflog_info *info;
8f8f5476 209 const char *printed_ref;
72b103fe
TR
210
211 if (!commit_reflog)
212 return;
213
8f8f5476
TR
214 if (shorten) {
215 if (!commit_reflog->reflogs->short_ref)
216 commit_reflog->reflogs->short_ref
217 = shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
218 printed_ref = commit_reflog->reflogs->short_ref;
219 } else {
220 printed_ref = commit_reflog->reflogs->ref;
221 }
222
223 strbuf_addf(sb, "%s@{", printed_ref);
794151e9 224 if (commit_reflog->selector == SELECTOR_DATE ||
55ccf85a 225 (commit_reflog->selector == SELECTOR_NONE && force_date)) {
72b103fe
TR
226 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
227 strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
228 } else {
229 strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
230 - 2 - commit_reflog->recno);
231 }
232
233 strbuf_addch(sb, '}');
234}
235
8f8f5476
TR
236void get_reflog_message(struct strbuf *sb,
237 struct reflog_walk_info *reflog_info)
238{
239 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
240 struct reflog_info *info;
241 size_t len;
242
243 if (!commit_reflog)
244 return;
245
246 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
247 len = strlen(info->message);
248 if (len > 0)
249 len--; /* strip away trailing newline */
250 strbuf_add(sb, info->message, len);
251}
252
cd1957f5
JK
253const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
254{
255 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
256 struct reflog_info *info;
257
258 if (!commit_reflog)
259 return NULL;
260
261 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
262 return info->email;
263}
264
de239446
JK
265timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
266{
267 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
268 struct reflog_info *info;
269
270 if (!commit_reflog)
271 return 0;
272
273 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
274 return info->timestamp;
275}
276
72b103fe 277void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
a5481a6c 278 const struct date_mode *dmode, int force_date)
8860fd42 279{
72b103fe
TR
280 if (reflog_info && reflog_info->last_commit_reflog) {
281 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
8860fd42 282 struct reflog_info *info;
72b103fe 283 struct strbuf selector = STRBUF_INIT;
8860fd42 284
4d12a471 285 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
55ccf85a 286 get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
4d12a471 287 if (oneline) {
72b103fe 288 printf("%s: %s", selector.buf, info->message);
4d12a471
JH
289 }
290 else {
72b103fe
TR
291 printf("Reflog: %s (%s)\nReflog message: %s",
292 selector.buf, info->email, info->message);
4d12a471 293 }
72b103fe
TR
294
295 strbuf_release(&selector);
8860fd42
JS
296 }
297}
7f97de5e
JK
298
299int reflog_walk_empty(struct reflog_walk_info *info)
300{
d08565bf
JK
301 return !info || !info->nr;
302}
303
304static struct commit *next_reflog_commit(struct commit_reflog *log)
305{
306 for (; log->recno >= 0; log->recno--) {
307 struct reflog_info *entry = &log->reflogs->items[log->recno];
109cd76d
SB
308 struct object *obj = parse_object(the_repository,
309 &entry->noid);
d08565bf
JK
310
311 if (obj && obj->type == OBJ_COMMIT)
312 return (struct commit *)obj;
313 }
314 return NULL;
315}
316
317static timestamp_t log_timestamp(struct commit_reflog *log)
318{
319 return log->reflogs->items[log->recno].timestamp;
320}
321
322struct commit *next_reflog_entry(struct reflog_walk_info *walk)
323{
324 struct commit_reflog *best = NULL;
325 struct commit *best_commit = NULL;
326 size_t i;
327
328 for (i = 0; i < walk->nr; i++) {
329 struct commit_reflog *log = walk->logs[i];
330 struct commit *commit = next_reflog_commit(log);
331
332 if (!commit)
333 continue;
334
335 if (!best || log_timestamp(log) > log_timestamp(best)) {
336 best = log;
337 best_commit = commit;
338 }
339 }
340
341 if (best) {
342 best->recno--;
343 walk->last_commit_reflog = best;
344 return best_commit;
345 }
346
347 return NULL;
7f97de5e 348}