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Commit | Line | Data |
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9385b5d7 | 1 | #include "cache.h" |
f0a90b4e | 2 | #include "string-list.h" |
85039fb6 | 3 | #include "run-command.h" |
61cfef4c | 4 | #include "commit.h" |
e1f89863 | 5 | #include "tempfile.h" |
b1d78d77 | 6 | #include "trailer.h" |
8966a394 | 7 | #include "list.h" |
9385b5d7 CC |
8 | /* |
9 | * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org> | |
10 | */ | |
11 | ||
12 | enum action_where { WHERE_END, WHERE_AFTER, WHERE_BEFORE, WHERE_START }; | |
13 | enum action_if_exists { EXISTS_ADD_IF_DIFFERENT_NEIGHBOR, EXISTS_ADD_IF_DIFFERENT, | |
14 | EXISTS_ADD, EXISTS_REPLACE, EXISTS_DO_NOTHING }; | |
15 | enum action_if_missing { MISSING_ADD, MISSING_DO_NOTHING }; | |
16 | ||
17 | struct conf_info { | |
18 | char *name; | |
19 | char *key; | |
20 | char *command; | |
21 | enum action_where where; | |
22 | enum action_if_exists if_exists; | |
23 | enum action_if_missing if_missing; | |
24 | }; | |
25 | ||
26 | static struct conf_info default_conf_info; | |
27 | ||
28 | struct trailer_item { | |
8966a394 | 29 | struct list_head list; |
d65fd424 JT |
30 | char *token; |
31 | char *value; | |
9385b5d7 CC |
32 | struct conf_info conf; |
33 | }; | |
34 | ||
8966a394 | 35 | static LIST_HEAD(conf_head); |
9385b5d7 CC |
36 | |
37 | static char *separators = ":"; | |
38 | ||
85039fb6 CC |
39 | #define TRAILER_ARG_STRING "$ARG" |
40 | ||
8966a394 JT |
41 | /* Iterate over the elements of the list. */ |
42 | #define list_for_each_dir(pos, head, is_reverse) \ | |
43 | for (pos = is_reverse ? (head)->prev : (head)->next; \ | |
44 | pos != (head); \ | |
45 | pos = is_reverse ? pos->prev : pos->next) | |
46 | ||
9385b5d7 CC |
47 | static int after_or_end(enum action_where where) |
48 | { | |
49 | return (where == WHERE_AFTER) || (where == WHERE_END); | |
50 | } | |
51 | ||
52 | /* | |
53 | * Return the length of the string not including any final | |
54 | * punctuation. E.g., the input "Signed-off-by:" would return | |
55 | * 13, stripping the trailing punctuation but retaining | |
56 | * internal punctuation. | |
57 | */ | |
58 | static size_t token_len_without_separator(const char *token, size_t len) | |
59 | { | |
60 | while (len > 0 && !isalnum(token[len - 1])) | |
61 | len--; | |
62 | return len; | |
63 | } | |
64 | ||
65 | static int same_token(struct trailer_item *a, struct trailer_item *b) | |
66 | { | |
67 | size_t a_len = token_len_without_separator(a->token, strlen(a->token)); | |
68 | size_t b_len = token_len_without_separator(b->token, strlen(b->token)); | |
69 | size_t min_len = (a_len > b_len) ? b_len : a_len; | |
70 | ||
71 | return !strncasecmp(a->token, b->token, min_len); | |
72 | } | |
73 | ||
74 | static int same_value(struct trailer_item *a, struct trailer_item *b) | |
75 | { | |
76 | return !strcasecmp(a->value, b->value); | |
77 | } | |
78 | ||
79 | static int same_trailer(struct trailer_item *a, struct trailer_item *b) | |
80 | { | |
81 | return same_token(a, b) && same_value(a, b); | |
82 | } | |
4103818d | 83 | |
2013d850 CC |
84 | static inline int contains_only_spaces(const char *str) |
85 | { | |
86 | const char *s = str; | |
87 | while (*s && isspace(*s)) | |
88 | s++; | |
89 | return !*s; | |
90 | } | |
91 | ||
85039fb6 CC |
92 | static inline void strbuf_replace(struct strbuf *sb, const char *a, const char *b) |
93 | { | |
94 | const char *ptr = strstr(sb->buf, a); | |
95 | if (ptr) | |
96 | strbuf_splice(sb, ptr - sb->buf, strlen(a), b, strlen(b)); | |
97 | } | |
98 | ||
4103818d CC |
99 | static void free_trailer_item(struct trailer_item *item) |
100 | { | |
101 | free(item->conf.name); | |
102 | free(item->conf.key); | |
103 | free(item->conf.command); | |
d65fd424 JT |
104 | free(item->token); |
105 | free(item->value); | |
4103818d CC |
106 | free(item); |
107 | } | |
108 | ||
b1d78d77 CC |
109 | static char last_non_space_char(const char *s) |
110 | { | |
111 | int i; | |
112 | for (i = strlen(s) - 1; i >= 0; i--) | |
113 | if (!isspace(s[i])) | |
114 | return s[i]; | |
115 | return '\0'; | |
116 | } | |
117 | ||
d0d2344a | 118 | static void print_tok_val(FILE *outfile, const char *tok, const char *val) |
b1d78d77 CC |
119 | { |
120 | char c = last_non_space_char(tok); | |
121 | if (!c) | |
122 | return; | |
123 | if (strchr(separators, c)) | |
d0d2344a | 124 | fprintf(outfile, "%s%s\n", tok, val); |
b1d78d77 | 125 | else |
d0d2344a | 126 | fprintf(outfile, "%s%c %s\n", tok, separators[0], val); |
b1d78d77 CC |
127 | } |
128 | ||
8966a394 | 129 | static void print_all(FILE *outfile, struct list_head *head, int trim_empty) |
b1d78d77 | 130 | { |
8966a394 | 131 | struct list_head *pos; |
b1d78d77 | 132 | struct trailer_item *item; |
8966a394 JT |
133 | list_for_each(pos, head) { |
134 | item = list_entry(pos, struct trailer_item, list); | |
b1d78d77 | 135 | if (!trim_empty || strlen(item->value) > 0) |
d0d2344a | 136 | print_tok_val(outfile, item->token, item->value); |
b1d78d77 CC |
137 | } |
138 | } | |
139 | ||
4103818d | 140 | static void add_arg_to_input_list(struct trailer_item *on_tok, |
8966a394 JT |
141 | struct trailer_item *arg_tok) |
142 | { | |
143 | if (after_or_end(arg_tok->conf.where)) | |
144 | list_add(&arg_tok->list, &on_tok->list); | |
145 | else | |
146 | list_add_tail(&arg_tok->list, &on_tok->list); | |
4103818d CC |
147 | } |
148 | ||
149 | static int check_if_different(struct trailer_item *in_tok, | |
150 | struct trailer_item *arg_tok, | |
8966a394 JT |
151 | int check_all, |
152 | struct list_head *head) | |
4103818d CC |
153 | { |
154 | enum action_where where = arg_tok->conf.where; | |
8966a394 | 155 | struct list_head *next_head; |
4103818d | 156 | do { |
4103818d CC |
157 | if (same_trailer(in_tok, arg_tok)) |
158 | return 0; | |
159 | /* | |
160 | * if we want to add a trailer after another one, | |
161 | * we have to check those before this one | |
162 | */ | |
8966a394 JT |
163 | next_head = after_or_end(where) ? in_tok->list.prev |
164 | : in_tok->list.next; | |
165 | if (next_head == head) | |
166 | break; | |
167 | in_tok = list_entry(next_head, struct trailer_item, list); | |
4103818d CC |
168 | } while (check_all); |
169 | return 1; | |
170 | } | |
171 | ||
d65fd424 | 172 | static char *apply_command(const char *command, const char *arg) |
85039fb6 CC |
173 | { |
174 | struct strbuf cmd = STRBUF_INIT; | |
175 | struct strbuf buf = STRBUF_INIT; | |
b226293b | 176 | struct child_process cp = CHILD_PROCESS_INIT; |
85039fb6 | 177 | const char *argv[] = {NULL, NULL}; |
d65fd424 | 178 | char *result; |
85039fb6 CC |
179 | |
180 | strbuf_addstr(&cmd, command); | |
181 | if (arg) | |
182 | strbuf_replace(&cmd, TRAILER_ARG_STRING, arg); | |
183 | ||
184 | argv[0] = cmd.buf; | |
85039fb6 CC |
185 | cp.argv = argv; |
186 | cp.env = local_repo_env; | |
187 | cp.no_stdin = 1; | |
85039fb6 CC |
188 | cp.use_shell = 1; |
189 | ||
c5eadcaa | 190 | if (capture_command(&cp, &buf, 1024)) { |
13ad56f8 | 191 | error(_("running trailer command '%s' failed"), cmd.buf); |
85039fb6 CC |
192 | strbuf_release(&buf); |
193 | result = xstrdup(""); | |
c5eadcaa JK |
194 | } else { |
195 | strbuf_trim(&buf); | |
85039fb6 | 196 | result = strbuf_detach(&buf, NULL); |
c5eadcaa | 197 | } |
85039fb6 CC |
198 | |
199 | strbuf_release(&cmd); | |
200 | return result; | |
201 | } | |
202 | ||
203 | static void apply_item_command(struct trailer_item *in_tok, struct trailer_item *arg_tok) | |
204 | { | |
205 | if (arg_tok->conf.command) { | |
206 | const char *arg; | |
207 | if (arg_tok->value && arg_tok->value[0]) { | |
208 | arg = arg_tok->value; | |
209 | } else { | |
210 | if (in_tok && in_tok->value) | |
211 | arg = xstrdup(in_tok->value); | |
212 | else | |
213 | arg = xstrdup(""); | |
214 | } | |
215 | arg_tok->value = apply_command(arg_tok->conf.command, arg); | |
216 | free((char *)arg); | |
217 | } | |
218 | } | |
219 | ||
4103818d CC |
220 | static void apply_arg_if_exists(struct trailer_item *in_tok, |
221 | struct trailer_item *arg_tok, | |
222 | struct trailer_item *on_tok, | |
8966a394 | 223 | struct list_head *head) |
4103818d CC |
224 | { |
225 | switch (arg_tok->conf.if_exists) { | |
226 | case EXISTS_DO_NOTHING: | |
227 | free_trailer_item(arg_tok); | |
228 | break; | |
229 | case EXISTS_REPLACE: | |
85039fb6 | 230 | apply_item_command(in_tok, arg_tok); |
8966a394 JT |
231 | add_arg_to_input_list(on_tok, arg_tok); |
232 | list_del(&in_tok->list); | |
4103818d CC |
233 | free_trailer_item(in_tok); |
234 | break; | |
235 | case EXISTS_ADD: | |
85039fb6 | 236 | apply_item_command(in_tok, arg_tok); |
8966a394 | 237 | add_arg_to_input_list(on_tok, arg_tok); |
4103818d CC |
238 | break; |
239 | case EXISTS_ADD_IF_DIFFERENT: | |
85039fb6 | 240 | apply_item_command(in_tok, arg_tok); |
8966a394 JT |
241 | if (check_if_different(in_tok, arg_tok, 1, head)) |
242 | add_arg_to_input_list(on_tok, arg_tok); | |
4103818d CC |
243 | else |
244 | free_trailer_item(arg_tok); | |
245 | break; | |
246 | case EXISTS_ADD_IF_DIFFERENT_NEIGHBOR: | |
85039fb6 | 247 | apply_item_command(in_tok, arg_tok); |
8966a394 JT |
248 | if (check_if_different(on_tok, arg_tok, 0, head)) |
249 | add_arg_to_input_list(on_tok, arg_tok); | |
4103818d CC |
250 | else |
251 | free_trailer_item(arg_tok); | |
252 | break; | |
253 | } | |
254 | } | |
255 | ||
8966a394 | 256 | static void apply_arg_if_missing(struct list_head *head, |
4103818d CC |
257 | struct trailer_item *arg_tok) |
258 | { | |
4103818d CC |
259 | enum action_where where; |
260 | ||
261 | switch (arg_tok->conf.if_missing) { | |
262 | case MISSING_DO_NOTHING: | |
263 | free_trailer_item(arg_tok); | |
264 | break; | |
265 | case MISSING_ADD: | |
266 | where = arg_tok->conf.where; | |
85039fb6 | 267 | apply_item_command(NULL, arg_tok); |
8966a394 JT |
268 | if (after_or_end(where)) |
269 | list_add_tail(&arg_tok->list, head); | |
270 | else | |
271 | list_add(&arg_tok->list, head); | |
4103818d CC |
272 | } |
273 | } | |
274 | ||
8966a394 | 275 | static int find_same_and_apply_arg(struct list_head *head, |
4103818d CC |
276 | struct trailer_item *arg_tok) |
277 | { | |
8966a394 | 278 | struct list_head *pos; |
4103818d CC |
279 | struct trailer_item *in_tok; |
280 | struct trailer_item *on_tok; | |
4103818d CC |
281 | |
282 | enum action_where where = arg_tok->conf.where; | |
283 | int middle = (where == WHERE_AFTER) || (where == WHERE_BEFORE); | |
284 | int backwards = after_or_end(where); | |
8966a394 | 285 | struct trailer_item *start_tok; |
4103818d | 286 | |
8966a394 JT |
287 | if (list_empty(head)) |
288 | return 0; | |
289 | ||
290 | start_tok = list_entry(backwards ? head->prev : head->next, | |
291 | struct trailer_item, | |
292 | list); | |
293 | ||
294 | list_for_each_dir(pos, head, backwards) { | |
295 | in_tok = list_entry(pos, struct trailer_item, list); | |
4103818d CC |
296 | if (!same_token(in_tok, arg_tok)) |
297 | continue; | |
298 | on_tok = middle ? in_tok : start_tok; | |
8966a394 | 299 | apply_arg_if_exists(in_tok, arg_tok, on_tok, head); |
4103818d CC |
300 | return 1; |
301 | } | |
302 | return 0; | |
303 | } | |
304 | ||
8966a394 JT |
305 | static void process_trailers_lists(struct list_head *head, |
306 | struct list_head *arg_head) | |
4103818d | 307 | { |
8966a394 | 308 | struct list_head *pos, *p; |
4103818d | 309 | struct trailer_item *arg_tok; |
4103818d | 310 | |
8966a394 | 311 | list_for_each_safe(pos, p, arg_head) { |
4103818d | 312 | int applied = 0; |
8966a394 | 313 | arg_tok = list_entry(pos, struct trailer_item, list); |
4103818d | 314 | |
8966a394 | 315 | list_del(pos); |
4103818d | 316 | |
8966a394 | 317 | applied = find_same_and_apply_arg(head, arg_tok); |
4103818d CC |
318 | |
319 | if (!applied) | |
8966a394 | 320 | apply_arg_if_missing(head, arg_tok); |
4103818d CC |
321 | } |
322 | } | |
46a0613f CC |
323 | |
324 | static int set_where(struct conf_info *item, const char *value) | |
325 | { | |
326 | if (!strcasecmp("after", value)) | |
327 | item->where = WHERE_AFTER; | |
328 | else if (!strcasecmp("before", value)) | |
329 | item->where = WHERE_BEFORE; | |
330 | else if (!strcasecmp("end", value)) | |
331 | item->where = WHERE_END; | |
332 | else if (!strcasecmp("start", value)) | |
333 | item->where = WHERE_START; | |
334 | else | |
335 | return -1; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | static int set_if_exists(struct conf_info *item, const char *value) | |
340 | { | |
341 | if (!strcasecmp("addIfDifferent", value)) | |
342 | item->if_exists = EXISTS_ADD_IF_DIFFERENT; | |
343 | else if (!strcasecmp("addIfDifferentNeighbor", value)) | |
344 | item->if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR; | |
345 | else if (!strcasecmp("add", value)) | |
346 | item->if_exists = EXISTS_ADD; | |
347 | else if (!strcasecmp("replace", value)) | |
348 | item->if_exists = EXISTS_REPLACE; | |
349 | else if (!strcasecmp("doNothing", value)) | |
350 | item->if_exists = EXISTS_DO_NOTHING; | |
351 | else | |
352 | return -1; | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int set_if_missing(struct conf_info *item, const char *value) | |
357 | { | |
358 | if (!strcasecmp("doNothing", value)) | |
359 | item->if_missing = MISSING_DO_NOTHING; | |
360 | else if (!strcasecmp("add", value)) | |
361 | item->if_missing = MISSING_ADD; | |
362 | else | |
363 | return -1; | |
364 | return 0; | |
365 | } | |
366 | ||
d65fd424 | 367 | static void duplicate_conf(struct conf_info *dst, const struct conf_info *src) |
46a0613f CC |
368 | { |
369 | *dst = *src; | |
370 | if (src->name) | |
371 | dst->name = xstrdup(src->name); | |
372 | if (src->key) | |
373 | dst->key = xstrdup(src->key); | |
374 | if (src->command) | |
375 | dst->command = xstrdup(src->command); | |
376 | } | |
377 | ||
378 | static struct trailer_item *get_conf_item(const char *name) | |
379 | { | |
8966a394 | 380 | struct list_head *pos; |
46a0613f | 381 | struct trailer_item *item; |
46a0613f CC |
382 | |
383 | /* Look up item with same name */ | |
8966a394 JT |
384 | list_for_each(pos, &conf_head) { |
385 | item = list_entry(pos, struct trailer_item, list); | |
46a0613f CC |
386 | if (!strcasecmp(item->conf.name, name)) |
387 | return item; | |
388 | } | |
389 | ||
390 | /* Item does not already exists, create it */ | |
391 | item = xcalloc(sizeof(struct trailer_item), 1); | |
392 | duplicate_conf(&item->conf, &default_conf_info); | |
393 | item->conf.name = xstrdup(name); | |
394 | ||
8966a394 | 395 | list_add_tail(&item->list, &conf_head); |
46a0613f CC |
396 | |
397 | return item; | |
398 | } | |
399 | ||
400 | enum trailer_info_type { TRAILER_KEY, TRAILER_COMMAND, TRAILER_WHERE, | |
401 | TRAILER_IF_EXISTS, TRAILER_IF_MISSING }; | |
402 | ||
403 | static struct { | |
404 | const char *name; | |
405 | enum trailer_info_type type; | |
406 | } trailer_config_items[] = { | |
407 | { "key", TRAILER_KEY }, | |
408 | { "command", TRAILER_COMMAND }, | |
409 | { "where", TRAILER_WHERE }, | |
410 | { "ifexists", TRAILER_IF_EXISTS }, | |
411 | { "ifmissing", TRAILER_IF_MISSING } | |
412 | }; | |
413 | ||
414 | static int git_trailer_default_config(const char *conf_key, const char *value, void *cb) | |
415 | { | |
416 | const char *trailer_item, *variable_name; | |
417 | ||
418 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
419 | return 0; | |
420 | ||
421 | variable_name = strrchr(trailer_item, '.'); | |
422 | if (!variable_name) { | |
423 | if (!strcmp(trailer_item, "where")) { | |
424 | if (set_where(&default_conf_info, value) < 0) | |
425 | warning(_("unknown value '%s' for key '%s'"), | |
426 | value, conf_key); | |
427 | } else if (!strcmp(trailer_item, "ifexists")) { | |
428 | if (set_if_exists(&default_conf_info, value) < 0) | |
429 | warning(_("unknown value '%s' for key '%s'"), | |
430 | value, conf_key); | |
431 | } else if (!strcmp(trailer_item, "ifmissing")) { | |
432 | if (set_if_missing(&default_conf_info, value) < 0) | |
433 | warning(_("unknown value '%s' for key '%s'"), | |
434 | value, conf_key); | |
435 | } else if (!strcmp(trailer_item, "separators")) { | |
436 | separators = xstrdup(value); | |
437 | } | |
438 | } | |
439 | return 0; | |
440 | } | |
441 | ||
442 | static int git_trailer_config(const char *conf_key, const char *value, void *cb) | |
443 | { | |
444 | const char *trailer_item, *variable_name; | |
445 | struct trailer_item *item; | |
446 | struct conf_info *conf; | |
447 | char *name = NULL; | |
448 | enum trailer_info_type type; | |
449 | int i; | |
450 | ||
451 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
452 | return 0; | |
453 | ||
454 | variable_name = strrchr(trailer_item, '.'); | |
455 | if (!variable_name) | |
456 | return 0; | |
457 | ||
458 | variable_name++; | |
459 | for (i = 0; i < ARRAY_SIZE(trailer_config_items); i++) { | |
460 | if (strcmp(trailer_config_items[i].name, variable_name)) | |
461 | continue; | |
462 | name = xstrndup(trailer_item, variable_name - trailer_item - 1); | |
463 | type = trailer_config_items[i].type; | |
464 | break; | |
465 | } | |
466 | ||
467 | if (!name) | |
468 | return 0; | |
469 | ||
470 | item = get_conf_item(name); | |
471 | conf = &item->conf; | |
472 | free(name); | |
473 | ||
474 | switch (type) { | |
475 | case TRAILER_KEY: | |
476 | if (conf->key) | |
477 | warning(_("more than one %s"), conf_key); | |
478 | conf->key = xstrdup(value); | |
479 | break; | |
480 | case TRAILER_COMMAND: | |
481 | if (conf->command) | |
482 | warning(_("more than one %s"), conf_key); | |
483 | conf->command = xstrdup(value); | |
484 | break; | |
485 | case TRAILER_WHERE: | |
486 | if (set_where(conf, value)) | |
487 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
488 | break; | |
489 | case TRAILER_IF_EXISTS: | |
490 | if (set_if_exists(conf, value)) | |
491 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
492 | break; | |
493 | case TRAILER_IF_MISSING: | |
494 | if (set_if_missing(conf, value)) | |
495 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
496 | break; | |
497 | default: | |
ef1177d1 | 498 | die("BUG: trailer.c: unhandled type %d", type); |
46a0613f CC |
499 | } |
500 | return 0; | |
501 | } | |
f0a90b4e | 502 | |
63ab3f34 JT |
503 | static const char *token_from_item(struct trailer_item *item, char *tok) |
504 | { | |
505 | if (item->conf.key) | |
506 | return item->conf.key; | |
507 | if (tok) | |
508 | return tok; | |
509 | return item->conf.name; | |
510 | } | |
511 | ||
512 | static int token_matches_item(const char *tok, struct trailer_item *item, int tok_len) | |
513 | { | |
514 | if (!strncasecmp(tok, item->conf.name, tok_len)) | |
515 | return 1; | |
516 | return item->conf.key ? !strncasecmp(tok, item->conf.key, tok_len) : 0; | |
517 | } | |
518 | ||
519 | static int parse_trailer(struct strbuf *tok, struct strbuf *val, | |
520 | const struct conf_info **conf, const char *trailer) | |
f0a90b4e CC |
521 | { |
522 | size_t len; | |
523 | struct strbuf seps = STRBUF_INIT; | |
63ab3f34 JT |
524 | struct trailer_item *item; |
525 | int tok_len; | |
526 | struct list_head *pos; | |
527 | ||
f0a90b4e CC |
528 | strbuf_addstr(&seps, separators); |
529 | strbuf_addch(&seps, '='); | |
530 | len = strcspn(trailer, seps.buf); | |
531 | strbuf_release(&seps); | |
d52adf1f CC |
532 | if (len == 0) { |
533 | int l = strlen(trailer); | |
534 | while (l > 0 && isspace(trailer[l - 1])) | |
535 | l--; | |
536 | return error(_("empty trailer token in trailer '%.*s'"), l, trailer); | |
537 | } | |
f0a90b4e CC |
538 | if (len < strlen(trailer)) { |
539 | strbuf_add(tok, trailer, len); | |
540 | strbuf_trim(tok); | |
541 | strbuf_addstr(val, trailer + len + 1); | |
542 | strbuf_trim(val); | |
543 | } else { | |
544 | strbuf_addstr(tok, trailer); | |
545 | strbuf_trim(tok); | |
546 | } | |
f0a90b4e CC |
547 | |
548 | /* Lookup if the token matches something in the config */ | |
63ab3f34 JT |
549 | tok_len = token_len_without_separator(tok->buf, tok->len); |
550 | *conf = &default_conf_info; | |
8966a394 JT |
551 | list_for_each(pos, &conf_head) { |
552 | item = list_entry(pos, struct trailer_item, list); | |
63ab3f34 JT |
553 | if (token_matches_item(tok->buf, item, tok_len)) { |
554 | char *tok_buf = strbuf_detach(tok, NULL); | |
555 | *conf = &item->conf; | |
556 | strbuf_addstr(tok, token_from_item(item, tok_buf)); | |
557 | free(tok_buf); | |
558 | break; | |
559 | } | |
f0a90b4e CC |
560 | } |
561 | ||
63ab3f34 | 562 | return 0; |
f0a90b4e CC |
563 | } |
564 | ||
63ab3f34 JT |
565 | static void add_trailer_item(struct list_head *head, char *tok, char *val, |
566 | const struct conf_info *conf) | |
f0a90b4e | 567 | { |
63ab3f34 JT |
568 | struct trailer_item *new = xcalloc(sizeof(*new), 1); |
569 | new->token = tok; | |
570 | new->value = val; | |
571 | duplicate_conf(&new->conf, conf); | |
8966a394 | 572 | list_add_tail(&new->list, head); |
f0a90b4e CC |
573 | } |
574 | ||
8966a394 JT |
575 | static void process_command_line_args(struct list_head *arg_head, |
576 | struct string_list *trailers) | |
f0a90b4e | 577 | { |
f0a90b4e | 578 | struct string_list_item *tr; |
85039fb6 | 579 | struct trailer_item *item; |
63ab3f34 JT |
580 | struct strbuf tok = STRBUF_INIT; |
581 | struct strbuf val = STRBUF_INIT; | |
582 | const struct conf_info *conf; | |
8966a394 | 583 | struct list_head *pos; |
85039fb6 CC |
584 | |
585 | /* Add a trailer item for each configured trailer with a command */ | |
8966a394 JT |
586 | list_for_each(pos, &conf_head) { |
587 | item = list_entry(pos, struct trailer_item, list); | |
63ab3f34 JT |
588 | if (item->conf.command) |
589 | add_trailer_item(arg_head, | |
590 | xstrdup(token_from_item(item, NULL)), | |
591 | xstrdup(""), | |
592 | &item->conf); | |
85039fb6 | 593 | } |
f0a90b4e | 594 | |
85039fb6 | 595 | /* Add a trailer item for each trailer on the command line */ |
f0a90b4e | 596 | for_each_string_list_item(tr, trailers) { |
63ab3f34 JT |
597 | if (!parse_trailer(&tok, &val, &conf, tr->string)) |
598 | add_trailer_item(arg_head, | |
599 | strbuf_detach(&tok, NULL), | |
600 | strbuf_detach(&val, NULL), | |
601 | conf); | |
f0a90b4e | 602 | } |
f0a90b4e | 603 | } |
2013d850 CC |
604 | |
605 | static struct strbuf **read_input_file(const char *file) | |
606 | { | |
607 | struct strbuf **lines; | |
608 | struct strbuf sb = STRBUF_INIT; | |
609 | ||
610 | if (file) { | |
611 | if (strbuf_read_file(&sb, file, 0) < 0) | |
612 | die_errno(_("could not read input file '%s'"), file); | |
613 | } else { | |
614 | if (strbuf_read(&sb, fileno(stdin), 0) < 0) | |
615 | die_errno(_("could not read from stdin")); | |
616 | } | |
617 | ||
618 | lines = strbuf_split(&sb, '\n'); | |
619 | ||
620 | strbuf_release(&sb); | |
621 | ||
622 | return lines; | |
623 | } | |
624 | ||
625 | /* | |
626 | * Return the (0 based) index of the start of the patch or the line | |
627 | * count if there is no patch in the message. | |
628 | */ | |
629 | static int find_patch_start(struct strbuf **lines, int count) | |
630 | { | |
631 | int i; | |
632 | ||
633 | /* Get the start of the patch part if any */ | |
634 | for (i = 0; i < count; i++) { | |
635 | if (starts_with(lines[i]->buf, "---")) | |
636 | return i; | |
637 | } | |
638 | ||
639 | return count; | |
640 | } | |
641 | ||
642 | /* | |
643 | * Return the (0 based) index of the first trailer line or count if | |
644 | * there are no trailers. Trailers are searched only in the lines from | |
645 | * index (count - 1) down to index 0. | |
646 | */ | |
647 | static int find_trailer_start(struct strbuf **lines, int count) | |
648 | { | |
5c99995d CC |
649 | int start, end_of_title, only_spaces = 1; |
650 | ||
651 | /* The first paragraph is the title and cannot be trailers */ | |
652 | for (start = 0; start < count; start++) { | |
653 | if (lines[start]->buf[0] == comment_line_char) | |
654 | continue; | |
655 | if (contains_only_spaces(lines[start]->buf)) | |
656 | break; | |
657 | } | |
658 | end_of_title = start; | |
2013d850 CC |
659 | |
660 | /* | |
661 | * Get the start of the trailers by looking starting from the end | |
662 | * for a line with only spaces before lines with one separator. | |
663 | */ | |
5c99995d | 664 | for (start = count - 1; start >= end_of_title; start--) { |
2013d850 CC |
665 | if (lines[start]->buf[0] == comment_line_char) |
666 | continue; | |
667 | if (contains_only_spaces(lines[start]->buf)) { | |
668 | if (only_spaces) | |
669 | continue; | |
670 | return start + 1; | |
671 | } | |
672 | if (strcspn(lines[start]->buf, separators) < lines[start]->len) { | |
673 | if (only_spaces) | |
674 | only_spaces = 0; | |
675 | continue; | |
676 | } | |
677 | return count; | |
678 | } | |
679 | ||
680 | return only_spaces ? count : 0; | |
681 | } | |
682 | ||
61cfef4c CC |
683 | /* Get the index of the end of the trailers */ |
684 | static int find_trailer_end(struct strbuf **lines, int patch_start) | |
685 | { | |
686 | struct strbuf sb = STRBUF_INIT; | |
687 | int i, ignore_bytes; | |
688 | ||
689 | for (i = 0; i < patch_start; i++) | |
690 | strbuf_addbuf(&sb, lines[i]); | |
691 | ignore_bytes = ignore_non_trailer(&sb); | |
692 | strbuf_release(&sb); | |
693 | for (i = patch_start - 1; i >= 0 && ignore_bytes > 0; i--) | |
694 | ignore_bytes -= lines[i]->len; | |
695 | ||
696 | return i + 1; | |
697 | } | |
698 | ||
2013d850 CC |
699 | static int has_blank_line_before(struct strbuf **lines, int start) |
700 | { | |
701 | for (;start >= 0; start--) { | |
702 | if (lines[start]->buf[0] == comment_line_char) | |
703 | continue; | |
704 | return contains_only_spaces(lines[start]->buf); | |
705 | } | |
706 | return 0; | |
707 | } | |
708 | ||
d0d2344a | 709 | static void print_lines(FILE *outfile, struct strbuf **lines, int start, int end) |
2013d850 CC |
710 | { |
711 | int i; | |
712 | for (i = start; lines[i] && i < end; i++) | |
d0d2344a | 713 | fprintf(outfile, "%s", lines[i]->buf); |
2013d850 CC |
714 | } |
715 | ||
d0d2344a TK |
716 | static int process_input_file(FILE *outfile, |
717 | struct strbuf **lines, | |
8966a394 | 718 | struct list_head *head) |
2013d850 CC |
719 | { |
720 | int count = 0; | |
61cfef4c | 721 | int patch_start, trailer_start, trailer_end, i; |
63ab3f34 JT |
722 | struct strbuf tok = STRBUF_INIT; |
723 | struct strbuf val = STRBUF_INIT; | |
724 | const struct conf_info *conf; | |
2013d850 CC |
725 | |
726 | /* Get the line count */ | |
727 | while (lines[count]) | |
728 | count++; | |
729 | ||
730 | patch_start = find_patch_start(lines, count); | |
61cfef4c CC |
731 | trailer_end = find_trailer_end(lines, patch_start); |
732 | trailer_start = find_trailer_start(lines, trailer_end); | |
2013d850 CC |
733 | |
734 | /* Print lines before the trailers as is */ | |
d0d2344a | 735 | print_lines(outfile, lines, 0, trailer_start); |
2013d850 CC |
736 | |
737 | if (!has_blank_line_before(lines, trailer_start - 1)) | |
d0d2344a | 738 | fprintf(outfile, "\n"); |
2013d850 CC |
739 | |
740 | /* Parse trailer lines */ | |
61cfef4c | 741 | for (i = trailer_start; i < trailer_end; i++) { |
63ab3f34 JT |
742 | if (lines[i]->buf[0] != comment_line_char && |
743 | !parse_trailer(&tok, &val, &conf, lines[i]->buf)) | |
744 | add_trailer_item(head, | |
745 | strbuf_detach(&tok, NULL), | |
746 | strbuf_detach(&val, NULL), | |
747 | conf); | |
2013d850 CC |
748 | } |
749 | ||
61cfef4c | 750 | return trailer_end; |
2013d850 | 751 | } |
b1d78d77 | 752 | |
8966a394 | 753 | static void free_all(struct list_head *head) |
b1d78d77 | 754 | { |
8966a394 JT |
755 | struct list_head *pos, *p; |
756 | list_for_each_safe(pos, p, head) { | |
757 | list_del(pos); | |
758 | free_trailer_item(list_entry(pos, struct trailer_item, list)); | |
b1d78d77 CC |
759 | } |
760 | } | |
761 | ||
e1f89863 TK |
762 | static struct tempfile trailers_tempfile; |
763 | ||
764 | static FILE *create_in_place_tempfile(const char *file) | |
765 | { | |
766 | struct stat st; | |
767 | struct strbuf template = STRBUF_INIT; | |
768 | const char *tail; | |
769 | FILE *outfile; | |
770 | ||
771 | if (stat(file, &st)) | |
772 | die_errno(_("could not stat %s"), file); | |
773 | if (!S_ISREG(st.st_mode)) | |
774 | die(_("file %s is not a regular file"), file); | |
775 | if (!(st.st_mode & S_IWUSR)) | |
776 | die(_("file %s is not writable by user"), file); | |
777 | ||
778 | /* Create temporary file in the same directory as the original */ | |
779 | tail = strrchr(file, '/'); | |
780 | if (tail != NULL) | |
781 | strbuf_add(&template, file, tail - file + 1); | |
782 | strbuf_addstr(&template, "git-interpret-trailers-XXXXXX"); | |
783 | ||
784 | xmks_tempfile_m(&trailers_tempfile, template.buf, st.st_mode); | |
785 | strbuf_release(&template); | |
786 | outfile = fdopen_tempfile(&trailers_tempfile, "w"); | |
787 | if (!outfile) | |
788 | die_errno(_("could not open temporary file")); | |
789 | ||
790 | return outfile; | |
791 | } | |
792 | ||
793 | void process_trailers(const char *file, int in_place, int trim_empty, struct string_list *trailers) | |
b1d78d77 | 794 | { |
8966a394 JT |
795 | LIST_HEAD(head); |
796 | LIST_HEAD(arg_head); | |
b1d78d77 | 797 | struct strbuf **lines; |
61cfef4c | 798 | int trailer_end; |
d0d2344a | 799 | FILE *outfile = stdout; |
b1d78d77 CC |
800 | |
801 | /* Default config must be setup first */ | |
802 | git_config(git_trailer_default_config, NULL); | |
803 | git_config(git_trailer_config, NULL); | |
804 | ||
805 | lines = read_input_file(file); | |
806 | ||
e1f89863 TK |
807 | if (in_place) |
808 | outfile = create_in_place_tempfile(file); | |
809 | ||
b1d78d77 | 810 | /* Print the lines before the trailers */ |
8966a394 | 811 | trailer_end = process_input_file(outfile, lines, &head); |
b1d78d77 | 812 | |
8966a394 | 813 | process_command_line_args(&arg_head, trailers); |
b1d78d77 | 814 | |
8966a394 | 815 | process_trailers_lists(&head, &arg_head); |
b1d78d77 | 816 | |
8966a394 | 817 | print_all(outfile, &head, trim_empty); |
b1d78d77 | 818 | |
8966a394 | 819 | free_all(&head); |
b1d78d77 CC |
820 | |
821 | /* Print the lines after the trailers as is */ | |
d0d2344a | 822 | print_lines(outfile, lines, trailer_end, INT_MAX); |
b1d78d77 | 823 | |
e1f89863 TK |
824 | if (in_place) |
825 | if (rename_tempfile(&trailers_tempfile, file)) | |
826 | die_errno(_("could not rename temporary file to %s"), file); | |
827 | ||
b1d78d77 CC |
828 | strbuf_list_free(lines); |
829 | } |