Merge tag 'v2.14.1'
[git/raj.git] / reflog-walk.c
blob081f89b70d643514f148aaff9121263361fdb956
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 struct object_id ooid, noid;
14 char *email;
15 timestamp_t timestamp;
16 int tz;
17 char *message;
18 } *items;
19 int nr, alloc;
22 static int read_one_reflog(struct object_id *ooid, struct object_id *noid,
23 const char *email, timestamp_t timestamp, int tz,
24 const char *message, void *cb_data)
26 struct complete_reflogs *array = cb_data;
27 struct reflog_info *item;
29 ALLOC_GROW(array->items, array->nr + 1, array->alloc);
30 item = array->items + array->nr;
31 oidcpy(&item->ooid, ooid);
32 oidcpy(&item->noid, noid);
33 item->email = xstrdup(email);
34 item->timestamp = timestamp;
35 item->tz = tz;
36 item->message = xstrdup(message);
37 array->nr++;
38 return 0;
41 static void free_complete_reflog(struct complete_reflogs *array)
43 int i;
45 if (!array)
46 return;
48 for (i = 0; i < array->nr; i++) {
49 free(array->items[i].email);
50 free(array->items[i].message);
52 free(array->items);
53 free(array->ref);
54 free(array);
57 static struct complete_reflogs *read_complete_reflog(const char *ref)
59 struct complete_reflogs *reflogs =
60 xcalloc(1, sizeof(struct complete_reflogs));
61 reflogs->ref = xstrdup(ref);
62 for_each_reflog_ent(ref, read_one_reflog, reflogs);
63 if (reflogs->nr == 0) {
64 struct object_id oid;
65 const char *name;
66 void *name_to_free;
67 name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
68 oid.hash, NULL);
69 if (name) {
70 for_each_reflog_ent(name, read_one_reflog, reflogs);
71 free(name_to_free);
74 if (reflogs->nr == 0) {
75 char *refname = xstrfmt("refs/%s", ref);
76 for_each_reflog_ent(refname, read_one_reflog, reflogs);
77 if (reflogs->nr == 0) {
78 free(refname);
79 refname = xstrfmt("refs/heads/%s", ref);
80 for_each_reflog_ent(refname, read_one_reflog, reflogs);
82 free(refname);
84 return reflogs;
87 static int get_reflog_recno_by_time(struct complete_reflogs *array,
88 timestamp_t timestamp)
90 int i;
91 for (i = array->nr - 1; i >= 0; i--)
92 if (timestamp >= array->items[i].timestamp)
93 return i;
94 return -1;
97 struct commit_info_lifo {
98 struct commit_info {
99 struct commit *commit;
100 void *util;
101 } *items;
102 int nr, alloc;
105 static struct commit_info *get_commit_info(struct commit *commit,
106 struct commit_info_lifo *lifo, int pop)
108 int i;
109 for (i = 0; i < lifo->nr; i++)
110 if (lifo->items[i].commit == commit) {
111 struct commit_info *result = &lifo->items[i];
112 if (pop) {
113 if (i + 1 < lifo->nr)
114 memmove(lifo->items + i,
115 lifo->items + i + 1,
116 (lifo->nr - i) *
117 sizeof(struct commit_info));
118 lifo->nr--;
120 return result;
122 return NULL;
125 static void add_commit_info(struct commit *commit, void *util,
126 struct commit_info_lifo *lifo)
128 struct commit_info *info;
129 ALLOC_GROW(lifo->items, lifo->nr + 1, lifo->alloc);
130 info = lifo->items + lifo->nr;
131 info->commit = commit;
132 info->util = util;
133 lifo->nr++;
136 struct commit_reflog {
137 int recno;
138 enum selector_type {
139 SELECTOR_NONE,
140 SELECTOR_INDEX,
141 SELECTOR_DATE
142 } selector;
143 struct complete_reflogs *reflogs;
146 struct reflog_walk_info {
147 struct commit_info_lifo reflogs;
148 struct string_list complete_reflogs;
149 struct commit_reflog *last_commit_reflog;
152 void init_reflog_walk(struct reflog_walk_info **info)
154 *info = xcalloc(1, sizeof(struct reflog_walk_info));
155 (*info)->complete_reflogs.strdup_strings = 1;
158 int add_reflog_for_walk(struct reflog_walk_info *info,
159 struct commit *commit, const char *name)
161 timestamp_t timestamp = 0;
162 int recno = -1;
163 struct string_list_item *item;
164 struct complete_reflogs *reflogs;
165 char *branch, *at = strchr(name, '@');
166 struct commit_reflog *commit_reflog;
167 enum selector_type selector = SELECTOR_NONE;
169 if (commit->object.flags & UNINTERESTING)
170 die ("Cannot walk reflogs for %s", name);
172 branch = xstrdup(name);
173 if (at && at[1] == '{') {
174 char *ep;
175 branch[at - name] = '\0';
176 recno = strtoul(at + 2, &ep, 10);
177 if (*ep != '}') {
178 recno = -1;
179 timestamp = approxidate(at + 2);
180 selector = SELECTOR_DATE;
182 else
183 selector = SELECTOR_INDEX;
184 } else
185 recno = 0;
187 item = string_list_lookup(&info->complete_reflogs, branch);
188 if (item)
189 reflogs = item->util;
190 else {
191 if (*branch == '\0') {
192 struct object_id oid;
193 free(branch);
194 branch = resolve_refdup("HEAD", 0, oid.hash, NULL);
195 if (!branch)
196 die ("No current branch");
199 reflogs = read_complete_reflog(branch);
200 if (!reflogs || reflogs->nr == 0) {
201 struct object_id oid;
202 char *b;
203 int ret = dwim_log(branch, strlen(branch),
204 oid.hash, &b);
205 if (ret > 1)
206 free(b);
207 else if (ret == 1) {
208 free_complete_reflog(reflogs);
209 free(branch);
210 branch = b;
211 reflogs = read_complete_reflog(branch);
214 if (!reflogs || reflogs->nr == 0) {
215 free_complete_reflog(reflogs);
216 free(branch);
217 return -1;
219 string_list_insert(&info->complete_reflogs, branch)->util
220 = reflogs;
222 free(branch);
224 commit_reflog = xcalloc(1, sizeof(struct commit_reflog));
225 if (recno < 0) {
226 commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
227 if (commit_reflog->recno < 0) {
228 free(commit_reflog);
229 return -1;
231 } else
232 commit_reflog->recno = reflogs->nr - recno - 1;
233 commit_reflog->selector = selector;
234 commit_reflog->reflogs = reflogs;
236 add_commit_info(commit, commit_reflog, &info->reflogs);
237 return 0;
240 void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
242 struct commit_info *commit_info =
243 get_commit_info(commit, &info->reflogs, 0);
244 struct commit_reflog *commit_reflog;
245 struct object *logobj;
246 struct reflog_info *reflog;
248 info->last_commit_reflog = NULL;
249 if (!commit_info)
250 return;
252 commit_reflog = commit_info->util;
253 if (commit_reflog->recno < 0) {
254 commit->parents = NULL;
255 return;
257 info->last_commit_reflog = commit_reflog;
259 do {
260 reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
261 commit_reflog->recno--;
262 logobj = parse_object(&reflog->ooid);
263 } while (commit_reflog->recno && (logobj && logobj->type != OBJ_COMMIT));
265 if (!logobj && commit_reflog->recno >= 0 && is_null_oid(&reflog->ooid)) {
266 /* a root commit, but there are still more entries to show */
267 reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
268 logobj = parse_object(&reflog->noid);
269 if (!logobj)
270 logobj = parse_object(&reflog->ooid);
273 if (!logobj || logobj->type != OBJ_COMMIT) {
274 commit_info->commit = NULL;
275 commit->parents = NULL;
276 return;
278 commit_info->commit = (struct commit *)logobj;
280 commit->parents = xcalloc(1, sizeof(struct commit_list));
281 commit->parents->item = commit_info->commit;
284 void get_reflog_selector(struct strbuf *sb,
285 struct reflog_walk_info *reflog_info,
286 const struct date_mode *dmode, int force_date,
287 int shorten)
289 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
290 struct reflog_info *info;
291 const char *printed_ref;
293 if (!commit_reflog)
294 return;
296 if (shorten) {
297 if (!commit_reflog->reflogs->short_ref)
298 commit_reflog->reflogs->short_ref
299 = shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
300 printed_ref = commit_reflog->reflogs->short_ref;
301 } else {
302 printed_ref = commit_reflog->reflogs->ref;
305 strbuf_addf(sb, "%s@{", printed_ref);
306 if (commit_reflog->selector == SELECTOR_DATE ||
307 (commit_reflog->selector == SELECTOR_NONE && force_date)) {
308 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
309 strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
310 } else {
311 strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
312 - 2 - commit_reflog->recno);
315 strbuf_addch(sb, '}');
318 void get_reflog_message(struct strbuf *sb,
319 struct reflog_walk_info *reflog_info)
321 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
322 struct reflog_info *info;
323 size_t len;
325 if (!commit_reflog)
326 return;
328 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
329 len = strlen(info->message);
330 if (len > 0)
331 len--; /* strip away trailing newline */
332 strbuf_add(sb, info->message, len);
335 const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
337 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
338 struct reflog_info *info;
340 if (!commit_reflog)
341 return NULL;
343 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
344 return info->email;
347 void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
348 const struct date_mode *dmode, int force_date)
350 if (reflog_info && reflog_info->last_commit_reflog) {
351 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
352 struct reflog_info *info;
353 struct strbuf selector = STRBUF_INIT;
355 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
356 get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
357 if (oneline) {
358 printf("%s: %s", selector.buf, info->message);
360 else {
361 printf("Reflog: %s (%s)\nReflog message: %s",
362 selector.buf, info->email, info->message);
365 strbuf_release(&selector);