stash: remove now superfluos help for "stash push"
[git.git] / reflog-walk.c
blob842b2f77dc3e40a2eb296bfade00d9d2104ff9e1
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 const char *name;
65 void *name_to_free;
66 name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
67 NULL, NULL);
68 if (name) {
69 for_each_reflog_ent(name, read_one_reflog, reflogs);
70 free(name_to_free);
73 if (reflogs->nr == 0) {
74 char *refname = xstrfmt("refs/%s", ref);
75 for_each_reflog_ent(refname, read_one_reflog, reflogs);
76 if (reflogs->nr == 0) {
77 free(refname);
78 refname = xstrfmt("refs/heads/%s", ref);
79 for_each_reflog_ent(refname, read_one_reflog, reflogs);
81 free(refname);
83 return reflogs;
86 static int get_reflog_recno_by_time(struct complete_reflogs *array,
87 timestamp_t timestamp)
89 int i;
90 for (i = array->nr - 1; i >= 0; i--)
91 if (timestamp >= array->items[i].timestamp)
92 return i;
93 return -1;
96 struct commit_reflog {
97 int recno;
98 enum selector_type {
99 SELECTOR_NONE,
100 SELECTOR_INDEX,
101 SELECTOR_DATE
102 } selector;
103 struct complete_reflogs *reflogs;
106 struct reflog_walk_info {
107 struct commit_reflog **logs;
108 size_t nr, alloc;
109 struct string_list complete_reflogs;
110 struct commit_reflog *last_commit_reflog;
113 void init_reflog_walk(struct reflog_walk_info **info)
115 *info = xcalloc(1, sizeof(struct reflog_walk_info));
116 (*info)->complete_reflogs.strdup_strings = 1;
119 int add_reflog_for_walk(struct reflog_walk_info *info,
120 struct commit *commit, const char *name)
122 timestamp_t timestamp = 0;
123 int recno = -1;
124 struct string_list_item *item;
125 struct complete_reflogs *reflogs;
126 char *branch, *at = strchr(name, '@');
127 struct commit_reflog *commit_reflog;
128 enum selector_type selector = SELECTOR_NONE;
130 if (commit->object.flags & UNINTERESTING)
131 die ("Cannot walk reflogs for %s", name);
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);
141 selector = SELECTOR_DATE;
143 else
144 selector = SELECTOR_INDEX;
145 } else
146 recno = 0;
148 item = string_list_lookup(&info->complete_reflogs, branch);
149 if (item)
150 reflogs = item->util;
151 else {
152 if (*branch == '\0') {
153 free(branch);
154 branch = resolve_refdup("HEAD", 0, NULL, NULL);
155 if (!branch)
156 die ("No current branch");
159 reflogs = read_complete_reflog(branch);
160 if (!reflogs || reflogs->nr == 0) {
161 struct object_id oid;
162 char *b;
163 int ret = dwim_log(branch, strlen(branch),
164 oid.hash, &b);
165 if (ret > 1)
166 free(b);
167 else if (ret == 1) {
168 free_complete_reflog(reflogs);
169 free(branch);
170 branch = b;
171 reflogs = read_complete_reflog(branch);
174 if (!reflogs || reflogs->nr == 0) {
175 free_complete_reflog(reflogs);
176 free(branch);
177 return -1;
179 string_list_insert(&info->complete_reflogs, branch)->util
180 = reflogs;
182 free(branch);
184 commit_reflog = xcalloc(1, sizeof(struct commit_reflog));
185 if (recno < 0) {
186 commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
187 if (commit_reflog->recno < 0) {
188 free(commit_reflog);
189 return -1;
191 } else
192 commit_reflog->recno = reflogs->nr - recno - 1;
193 commit_reflog->selector = selector;
194 commit_reflog->reflogs = reflogs;
196 ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
197 info->logs[info->nr++] = commit_reflog;
199 return 0;
202 void get_reflog_selector(struct strbuf *sb,
203 struct reflog_walk_info *reflog_info,
204 const struct date_mode *dmode, int force_date,
205 int shorten)
207 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
208 struct reflog_info *info;
209 const char *printed_ref;
211 if (!commit_reflog)
212 return;
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;
223 strbuf_addf(sb, "%s@{", printed_ref);
224 if (commit_reflog->selector == SELECTOR_DATE ||
225 (commit_reflog->selector == SELECTOR_NONE && force_date)) {
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);
233 strbuf_addch(sb, '}');
236 void get_reflog_message(struct strbuf *sb,
237 struct reflog_walk_info *reflog_info)
239 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
240 struct reflog_info *info;
241 size_t len;
243 if (!commit_reflog)
244 return;
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);
253 const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
255 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
256 struct reflog_info *info;
258 if (!commit_reflog)
259 return NULL;
261 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
262 return info->email;
265 timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
267 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
268 struct reflog_info *info;
270 if (!commit_reflog)
271 return 0;
273 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
274 return info->timestamp;
277 void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
278 const struct date_mode *dmode, int force_date)
280 if (reflog_info && reflog_info->last_commit_reflog) {
281 struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
282 struct reflog_info *info;
283 struct strbuf selector = STRBUF_INIT;
285 info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
286 get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
287 if (oneline) {
288 printf("%s: %s", selector.buf, info->message);
290 else {
291 printf("Reflog: %s (%s)\nReflog message: %s",
292 selector.buf, info->email, info->message);
295 strbuf_release(&selector);
299 int reflog_walk_empty(struct reflog_walk_info *info)
301 return !info || !info->nr;
304 static struct commit *next_reflog_commit(struct commit_reflog *log)
306 for (; log->recno >= 0; log->recno--) {
307 struct reflog_info *entry = &log->reflogs->items[log->recno];
308 struct object *obj = parse_object(&entry->noid);
310 if (obj && obj->type == OBJ_COMMIT)
311 return (struct commit *)obj;
313 return NULL;
316 static timestamp_t log_timestamp(struct commit_reflog *log)
318 return log->reflogs->items[log->recno].timestamp;
321 struct commit *next_reflog_entry(struct reflog_walk_info *walk)
323 struct commit_reflog *best = NULL;
324 struct commit *best_commit = NULL;
325 size_t i;
327 for (i = 0; i < walk->nr; i++) {
328 struct commit_reflog *log = walk->logs[i];
329 struct commit *commit = next_reflog_commit(log);
331 if (!commit)
332 continue;
334 if (!best || log_timestamp(log) > log_timestamp(best)) {
335 best = log;
336 best_commit = commit;
340 if (best) {
341 best->recno--;
342 walk->last_commit_reflog = best;
343 return best_commit;
346 return NULL;