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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" | |
8 | ||
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 | }; | |
21 | ||
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; | |
28 | ||
29 | ALLOC_GROW(array->items, array->nr + 1, array->alloc); | |
30 | item = array->items + array->nr; | |
31 | hashcpy(item->osha1, osha1); | |
32 | hashcpy(item->nsha1, nsha1); | |
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 | ||
41 | static struct complete_reflogs *read_complete_reflog(const char *ref) | |
42 | { | |
43 | struct complete_reflogs *reflogs = | |
44 | xcalloc(sizeof(struct complete_reflogs), 1); | |
45 | reflogs->ref = xstrdup(ref); | |
46 | for_each_reflog_ent(ref, read_one_reflog, reflogs); | |
47 | if (reflogs->nr == 0) { | |
48 | unsigned char sha1[20]; | |
49 | const char *name; | |
50 | void *name_to_free; | |
51 | name = name_to_free = resolve_refdup(ref, sha1, 1, NULL); | |
52 | if (name) { | |
53 | for_each_reflog_ent(name, read_one_reflog, reflogs); | |
54 | free(name_to_free); | |
55 | } | |
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 | } | |
70 | ||
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 | } | |
80 | ||
81 | struct commit_info_lifo { | |
82 | struct commit_info { | |
83 | struct commit *commit; | |
84 | void *util; | |
85 | } *items; | |
86 | int nr, alloc; | |
87 | }; | |
88 | ||
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; | |
107 | } | |
108 | ||
109 | static void add_commit_info(struct commit *commit, void *util, | |
110 | struct commit_info_lifo *lifo) | |
111 | { | |
112 | struct commit_info *info; | |
113 | ALLOC_GROW(lifo->items, lifo->nr + 1, lifo->alloc); | |
114 | info = lifo->items + lifo->nr; | |
115 | info->commit = commit; | |
116 | info->util = util; | |
117 | lifo->nr++; | |
118 | } | |
119 | ||
120 | struct commit_reflog { | |
121 | int recno; | |
122 | enum selector_type { | |
123 | SELECTOR_NONE, | |
124 | SELECTOR_INDEX, | |
125 | SELECTOR_DATE | |
126 | } selector; | |
127 | struct complete_reflogs *reflogs; | |
128 | }; | |
129 | ||
130 | struct reflog_walk_info { | |
131 | struct commit_info_lifo reflogs; | |
132 | struct string_list complete_reflogs; | |
133 | struct commit_reflog *last_commit_reflog; | |
134 | }; | |
135 | ||
136 | void init_reflog_walk(struct reflog_walk_info** info) | |
137 | { | |
138 | *info = xcalloc(sizeof(struct reflog_walk_info), 1); | |
139 | } | |
140 | ||
141 | int add_reflog_for_walk(struct reflog_walk_info *info, | |
142 | struct commit *commit, const char *name) | |
143 | { | |
144 | unsigned long timestamp = 0; | |
145 | int recno = -1; | |
146 | struct string_list_item *item; | |
147 | struct complete_reflogs *reflogs; | |
148 | char *branch, *at = strchr(name, '@'); | |
149 | struct commit_reflog *commit_reflog; | |
150 | enum selector_type selector = SELECTOR_NONE; | |
151 | ||
152 | if (commit->object.flags & UNINTERESTING) | |
153 | die ("Cannot walk reflogs for %s", name); | |
154 | ||
155 | branch = xstrdup(name); | |
156 | if (at && at[1] == '{') { | |
157 | char *ep; | |
158 | branch[at - name] = '\0'; | |
159 | recno = strtoul(at + 2, &ep, 10); | |
160 | if (*ep != '}') { | |
161 | recno = -1; | |
162 | timestamp = approxidate(at + 2); | |
163 | selector = SELECTOR_DATE; | |
164 | } | |
165 | else | |
166 | selector = SELECTOR_INDEX; | |
167 | } else | |
168 | recno = 0; | |
169 | ||
170 | item = string_list_lookup(&info->complete_reflogs, branch); | |
171 | if (item) | |
172 | reflogs = item->util; | |
173 | else { | |
174 | if (*branch == '\0') { | |
175 | unsigned char sha1[20]; | |
176 | free(branch); | |
177 | branch = resolve_refdup("HEAD", sha1, 0, NULL); | |
178 | if (!branch) | |
179 | die ("No current branch"); | |
180 | ||
181 | } | |
182 | reflogs = read_complete_reflog(branch); | |
183 | if (!reflogs || reflogs->nr == 0) { | |
184 | unsigned char sha1[20]; | |
185 | char *b; | |
186 | if (dwim_log(branch, strlen(branch), sha1, &b) == 1) { | |
187 | if (reflogs) { | |
188 | free(reflogs->ref); | |
189 | free(reflogs); | |
190 | } | |
191 | free(branch); | |
192 | branch = b; | |
193 | reflogs = read_complete_reflog(branch); | |
194 | } | |
195 | } | |
196 | if (!reflogs || reflogs->nr == 0) | |
197 | return -1; | |
198 | string_list_insert(&info->complete_reflogs, branch)->util | |
199 | = reflogs; | |
200 | } | |
201 | ||
202 | commit_reflog = xcalloc(sizeof(struct commit_reflog), 1); | |
203 | if (recno < 0) { | |
204 | commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp); | |
205 | if (commit_reflog->recno < 0) { | |
206 | free(branch); | |
207 | free(commit_reflog); | |
208 | return -1; | |
209 | } | |
210 | } else | |
211 | commit_reflog->recno = reflogs->nr - recno - 1; | |
212 | commit_reflog->selector = selector; | |
213 | commit_reflog->reflogs = reflogs; | |
214 | ||
215 | add_commit_info(commit, commit_reflog, &info->reflogs); | |
216 | return 0; | |
217 | } | |
218 | ||
219 | void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit) | |
220 | { | |
221 | struct commit_info *commit_info = | |
222 | get_commit_info(commit, &info->reflogs, 0); | |
223 | struct commit_reflog *commit_reflog; | |
224 | struct reflog_info *reflog; | |
225 | ||
226 | info->last_commit_reflog = NULL; | |
227 | if (!commit_info) | |
228 | return; | |
229 | ||
230 | commit_reflog = commit_info->util; | |
231 | if (commit_reflog->recno < 0) { | |
232 | commit->parents = NULL; | |
233 | return; | |
234 | } | |
235 | ||
236 | reflog = &commit_reflog->reflogs->items[commit_reflog->recno]; | |
237 | info->last_commit_reflog = commit_reflog; | |
238 | commit_reflog->recno--; | |
239 | commit_info->commit = (struct commit *)parse_object(reflog->osha1); | |
240 | if (!commit_info->commit) { | |
241 | commit->parents = NULL; | |
242 | return; | |
243 | } | |
244 | ||
245 | commit->parents = xcalloc(sizeof(struct commit_list), 1); | |
246 | commit->parents->item = commit_info->commit; | |
247 | } | |
248 | ||
249 | void get_reflog_selector(struct strbuf *sb, | |
250 | struct reflog_walk_info *reflog_info, | |
251 | enum date_mode dmode, int force_date, | |
252 | int shorten) | |
253 | { | |
254 | struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog; | |
255 | struct reflog_info *info; | |
256 | const char *printed_ref; | |
257 | ||
258 | if (!commit_reflog) | |
259 | return; | |
260 | ||
261 | if (shorten) { | |
262 | if (!commit_reflog->reflogs->short_ref) | |
263 | commit_reflog->reflogs->short_ref | |
264 | = shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0); | |
265 | printed_ref = commit_reflog->reflogs->short_ref; | |
266 | } else { | |
267 | printed_ref = commit_reflog->reflogs->ref; | |
268 | } | |
269 | ||
270 | strbuf_addf(sb, "%s@{", printed_ref); | |
271 | if (commit_reflog->selector == SELECTOR_DATE || | |
272 | (commit_reflog->selector == SELECTOR_NONE && force_date)) { | |
273 | info = &commit_reflog->reflogs->items[commit_reflog->recno+1]; | |
274 | strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode)); | |
275 | } else { | |
276 | strbuf_addf(sb, "%d", commit_reflog->reflogs->nr | |
277 | - 2 - commit_reflog->recno); | |
278 | } | |
279 | ||
280 | strbuf_addch(sb, '}'); | |
281 | } | |
282 | ||
283 | void get_reflog_message(struct strbuf *sb, | |
284 | struct reflog_walk_info *reflog_info) | |
285 | { | |
286 | struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog; | |
287 | struct reflog_info *info; | |
288 | size_t len; | |
289 | ||
290 | if (!commit_reflog) | |
291 | return; | |
292 | ||
293 | info = &commit_reflog->reflogs->items[commit_reflog->recno+1]; | |
294 | len = strlen(info->message); | |
295 | if (len > 0) | |
296 | len--; /* strip away trailing newline */ | |
297 | strbuf_add(sb, info->message, len); | |
298 | } | |
299 | ||
300 | const char *get_reflog_ident(struct reflog_walk_info *reflog_info) | |
301 | { | |
302 | struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog; | |
303 | struct reflog_info *info; | |
304 | ||
305 | if (!commit_reflog) | |
306 | return NULL; | |
307 | ||
308 | info = &commit_reflog->reflogs->items[commit_reflog->recno+1]; | |
309 | return info->email; | |
310 | } | |
311 | ||
312 | void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline, | |
313 | enum date_mode dmode, int force_date) | |
314 | { | |
315 | if (reflog_info && reflog_info->last_commit_reflog) { | |
316 | struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog; | |
317 | struct reflog_info *info; | |
318 | struct strbuf selector = STRBUF_INIT; | |
319 | ||
320 | info = &commit_reflog->reflogs->items[commit_reflog->recno+1]; | |
321 | get_reflog_selector(&selector, reflog_info, dmode, force_date, 0); | |
322 | if (oneline) { | |
323 | printf("%s: %s", selector.buf, info->message); | |
324 | } | |
325 | else { | |
326 | printf("Reflog: %s (%s)\nReflog message: %s", | |
327 | selector.buf, info->email, info->message); | |
328 | } | |
329 | ||
330 | strbuf_release(&selector); | |
331 | } | |
332 | } |