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9385b5d7 | 1 | #include "cache.h" |
f0a90b4e | 2 | #include "string-list.h" |
9385b5d7 CC |
3 | /* |
4 | * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org> | |
5 | */ | |
6 | ||
7 | enum action_where { WHERE_END, WHERE_AFTER, WHERE_BEFORE, WHERE_START }; | |
8 | enum action_if_exists { EXISTS_ADD_IF_DIFFERENT_NEIGHBOR, EXISTS_ADD_IF_DIFFERENT, | |
9 | EXISTS_ADD, EXISTS_REPLACE, EXISTS_DO_NOTHING }; | |
10 | enum action_if_missing { MISSING_ADD, MISSING_DO_NOTHING }; | |
11 | ||
12 | struct conf_info { | |
13 | char *name; | |
14 | char *key; | |
15 | char *command; | |
16 | enum action_where where; | |
17 | enum action_if_exists if_exists; | |
18 | enum action_if_missing if_missing; | |
19 | }; | |
20 | ||
21 | static struct conf_info default_conf_info; | |
22 | ||
23 | struct trailer_item { | |
24 | struct trailer_item *previous; | |
25 | struct trailer_item *next; | |
26 | const char *token; | |
27 | const char *value; | |
28 | struct conf_info conf; | |
29 | }; | |
30 | ||
31 | static struct trailer_item *first_conf_item; | |
32 | ||
33 | static char *separators = ":"; | |
34 | ||
35 | static int after_or_end(enum action_where where) | |
36 | { | |
37 | return (where == WHERE_AFTER) || (where == WHERE_END); | |
38 | } | |
39 | ||
40 | /* | |
41 | * Return the length of the string not including any final | |
42 | * punctuation. E.g., the input "Signed-off-by:" would return | |
43 | * 13, stripping the trailing punctuation but retaining | |
44 | * internal punctuation. | |
45 | */ | |
46 | static size_t token_len_without_separator(const char *token, size_t len) | |
47 | { | |
48 | while (len > 0 && !isalnum(token[len - 1])) | |
49 | len--; | |
50 | return len; | |
51 | } | |
52 | ||
53 | static int same_token(struct trailer_item *a, struct trailer_item *b) | |
54 | { | |
55 | size_t a_len = token_len_without_separator(a->token, strlen(a->token)); | |
56 | size_t b_len = token_len_without_separator(b->token, strlen(b->token)); | |
57 | size_t min_len = (a_len > b_len) ? b_len : a_len; | |
58 | ||
59 | return !strncasecmp(a->token, b->token, min_len); | |
60 | } | |
61 | ||
62 | static int same_value(struct trailer_item *a, struct trailer_item *b) | |
63 | { | |
64 | return !strcasecmp(a->value, b->value); | |
65 | } | |
66 | ||
67 | static int same_trailer(struct trailer_item *a, struct trailer_item *b) | |
68 | { | |
69 | return same_token(a, b) && same_value(a, b); | |
70 | } | |
4103818d | 71 | |
2013d850 CC |
72 | static inline int contains_only_spaces(const char *str) |
73 | { | |
74 | const char *s = str; | |
75 | while (*s && isspace(*s)) | |
76 | s++; | |
77 | return !*s; | |
78 | } | |
79 | ||
4103818d CC |
80 | static void free_trailer_item(struct trailer_item *item) |
81 | { | |
82 | free(item->conf.name); | |
83 | free(item->conf.key); | |
84 | free(item->conf.command); | |
85 | free((char *)item->token); | |
86 | free((char *)item->value); | |
87 | free(item); | |
88 | } | |
89 | ||
90 | static void update_last(struct trailer_item **last) | |
91 | { | |
92 | if (*last) | |
93 | while ((*last)->next != NULL) | |
94 | *last = (*last)->next; | |
95 | } | |
96 | ||
97 | static void update_first(struct trailer_item **first) | |
98 | { | |
99 | if (*first) | |
100 | while ((*first)->previous != NULL) | |
101 | *first = (*first)->previous; | |
102 | } | |
103 | ||
104 | static void add_arg_to_input_list(struct trailer_item *on_tok, | |
105 | struct trailer_item *arg_tok, | |
106 | struct trailer_item **first, | |
107 | struct trailer_item **last) | |
108 | { | |
109 | if (after_or_end(arg_tok->conf.where)) { | |
110 | arg_tok->next = on_tok->next; | |
111 | on_tok->next = arg_tok; | |
112 | arg_tok->previous = on_tok; | |
113 | if (arg_tok->next) | |
114 | arg_tok->next->previous = arg_tok; | |
115 | update_last(last); | |
116 | } else { | |
117 | arg_tok->previous = on_tok->previous; | |
118 | on_tok->previous = arg_tok; | |
119 | arg_tok->next = on_tok; | |
120 | if (arg_tok->previous) | |
121 | arg_tok->previous->next = arg_tok; | |
122 | update_first(first); | |
123 | } | |
124 | } | |
125 | ||
126 | static int check_if_different(struct trailer_item *in_tok, | |
127 | struct trailer_item *arg_tok, | |
128 | int check_all) | |
129 | { | |
130 | enum action_where where = arg_tok->conf.where; | |
131 | do { | |
132 | if (!in_tok) | |
133 | return 1; | |
134 | if (same_trailer(in_tok, arg_tok)) | |
135 | return 0; | |
136 | /* | |
137 | * if we want to add a trailer after another one, | |
138 | * we have to check those before this one | |
139 | */ | |
140 | in_tok = after_or_end(where) ? in_tok->previous : in_tok->next; | |
141 | } while (check_all); | |
142 | return 1; | |
143 | } | |
144 | ||
145 | static void remove_from_list(struct trailer_item *item, | |
146 | struct trailer_item **first, | |
147 | struct trailer_item **last) | |
148 | { | |
149 | struct trailer_item *next = item->next; | |
150 | struct trailer_item *previous = item->previous; | |
151 | ||
152 | if (next) { | |
153 | item->next->previous = previous; | |
154 | item->next = NULL; | |
155 | } else if (last) | |
156 | *last = previous; | |
157 | ||
158 | if (previous) { | |
159 | item->previous->next = next; | |
160 | item->previous = NULL; | |
161 | } else if (first) | |
162 | *first = next; | |
163 | } | |
164 | ||
165 | static struct trailer_item *remove_first(struct trailer_item **first) | |
166 | { | |
167 | struct trailer_item *item = *first; | |
168 | *first = item->next; | |
169 | if (item->next) { | |
170 | item->next->previous = NULL; | |
171 | item->next = NULL; | |
172 | } | |
173 | return item; | |
174 | } | |
175 | ||
176 | static void apply_arg_if_exists(struct trailer_item *in_tok, | |
177 | struct trailer_item *arg_tok, | |
178 | struct trailer_item *on_tok, | |
179 | struct trailer_item **in_tok_first, | |
180 | struct trailer_item **in_tok_last) | |
181 | { | |
182 | switch (arg_tok->conf.if_exists) { | |
183 | case EXISTS_DO_NOTHING: | |
184 | free_trailer_item(arg_tok); | |
185 | break; | |
186 | case EXISTS_REPLACE: | |
187 | add_arg_to_input_list(on_tok, arg_tok, | |
188 | in_tok_first, in_tok_last); | |
189 | remove_from_list(in_tok, in_tok_first, in_tok_last); | |
190 | free_trailer_item(in_tok); | |
191 | break; | |
192 | case EXISTS_ADD: | |
193 | add_arg_to_input_list(on_tok, arg_tok, | |
194 | in_tok_first, in_tok_last); | |
195 | break; | |
196 | case EXISTS_ADD_IF_DIFFERENT: | |
197 | if (check_if_different(in_tok, arg_tok, 1)) | |
198 | add_arg_to_input_list(on_tok, arg_tok, | |
199 | in_tok_first, in_tok_last); | |
200 | else | |
201 | free_trailer_item(arg_tok); | |
202 | break; | |
203 | case EXISTS_ADD_IF_DIFFERENT_NEIGHBOR: | |
204 | if (check_if_different(on_tok, arg_tok, 0)) | |
205 | add_arg_to_input_list(on_tok, arg_tok, | |
206 | in_tok_first, in_tok_last); | |
207 | else | |
208 | free_trailer_item(arg_tok); | |
209 | break; | |
210 | } | |
211 | } | |
212 | ||
213 | static void apply_arg_if_missing(struct trailer_item **in_tok_first, | |
214 | struct trailer_item **in_tok_last, | |
215 | struct trailer_item *arg_tok) | |
216 | { | |
217 | struct trailer_item **in_tok; | |
218 | enum action_where where; | |
219 | ||
220 | switch (arg_tok->conf.if_missing) { | |
221 | case MISSING_DO_NOTHING: | |
222 | free_trailer_item(arg_tok); | |
223 | break; | |
224 | case MISSING_ADD: | |
225 | where = arg_tok->conf.where; | |
226 | in_tok = after_or_end(where) ? in_tok_last : in_tok_first; | |
227 | if (*in_tok) { | |
228 | add_arg_to_input_list(*in_tok, arg_tok, | |
229 | in_tok_first, in_tok_last); | |
230 | } else { | |
231 | *in_tok_first = arg_tok; | |
232 | *in_tok_last = arg_tok; | |
233 | } | |
234 | break; | |
235 | } | |
236 | } | |
237 | ||
238 | static int find_same_and_apply_arg(struct trailer_item **in_tok_first, | |
239 | struct trailer_item **in_tok_last, | |
240 | struct trailer_item *arg_tok) | |
241 | { | |
242 | struct trailer_item *in_tok; | |
243 | struct trailer_item *on_tok; | |
244 | struct trailer_item *following_tok; | |
245 | ||
246 | enum action_where where = arg_tok->conf.where; | |
247 | int middle = (where == WHERE_AFTER) || (where == WHERE_BEFORE); | |
248 | int backwards = after_or_end(where); | |
249 | struct trailer_item *start_tok = backwards ? *in_tok_last : *in_tok_first; | |
250 | ||
251 | for (in_tok = start_tok; in_tok; in_tok = following_tok) { | |
252 | following_tok = backwards ? in_tok->previous : in_tok->next; | |
253 | if (!same_token(in_tok, arg_tok)) | |
254 | continue; | |
255 | on_tok = middle ? in_tok : start_tok; | |
256 | apply_arg_if_exists(in_tok, arg_tok, on_tok, | |
257 | in_tok_first, in_tok_last); | |
258 | return 1; | |
259 | } | |
260 | return 0; | |
261 | } | |
262 | ||
263 | static void process_trailers_lists(struct trailer_item **in_tok_first, | |
264 | struct trailer_item **in_tok_last, | |
265 | struct trailer_item **arg_tok_first) | |
266 | { | |
267 | struct trailer_item *arg_tok; | |
268 | struct trailer_item *next_arg; | |
269 | ||
270 | if (!*arg_tok_first) | |
271 | return; | |
272 | ||
273 | for (arg_tok = *arg_tok_first; arg_tok; arg_tok = next_arg) { | |
274 | int applied = 0; | |
275 | ||
276 | next_arg = arg_tok->next; | |
277 | remove_from_list(arg_tok, arg_tok_first, NULL); | |
278 | ||
279 | applied = find_same_and_apply_arg(in_tok_first, | |
280 | in_tok_last, | |
281 | arg_tok); | |
282 | ||
283 | if (!applied) | |
284 | apply_arg_if_missing(in_tok_first, | |
285 | in_tok_last, | |
286 | arg_tok); | |
287 | } | |
288 | } | |
46a0613f CC |
289 | |
290 | static int set_where(struct conf_info *item, const char *value) | |
291 | { | |
292 | if (!strcasecmp("after", value)) | |
293 | item->where = WHERE_AFTER; | |
294 | else if (!strcasecmp("before", value)) | |
295 | item->where = WHERE_BEFORE; | |
296 | else if (!strcasecmp("end", value)) | |
297 | item->where = WHERE_END; | |
298 | else if (!strcasecmp("start", value)) | |
299 | item->where = WHERE_START; | |
300 | else | |
301 | return -1; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | static int set_if_exists(struct conf_info *item, const char *value) | |
306 | { | |
307 | if (!strcasecmp("addIfDifferent", value)) | |
308 | item->if_exists = EXISTS_ADD_IF_DIFFERENT; | |
309 | else if (!strcasecmp("addIfDifferentNeighbor", value)) | |
310 | item->if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR; | |
311 | else if (!strcasecmp("add", value)) | |
312 | item->if_exists = EXISTS_ADD; | |
313 | else if (!strcasecmp("replace", value)) | |
314 | item->if_exists = EXISTS_REPLACE; | |
315 | else if (!strcasecmp("doNothing", value)) | |
316 | item->if_exists = EXISTS_DO_NOTHING; | |
317 | else | |
318 | return -1; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static int set_if_missing(struct conf_info *item, const char *value) | |
323 | { | |
324 | if (!strcasecmp("doNothing", value)) | |
325 | item->if_missing = MISSING_DO_NOTHING; | |
326 | else if (!strcasecmp("add", value)) | |
327 | item->if_missing = MISSING_ADD; | |
328 | else | |
329 | return -1; | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static void duplicate_conf(struct conf_info *dst, struct conf_info *src) | |
334 | { | |
335 | *dst = *src; | |
336 | if (src->name) | |
337 | dst->name = xstrdup(src->name); | |
338 | if (src->key) | |
339 | dst->key = xstrdup(src->key); | |
340 | if (src->command) | |
341 | dst->command = xstrdup(src->command); | |
342 | } | |
343 | ||
344 | static struct trailer_item *get_conf_item(const char *name) | |
345 | { | |
346 | struct trailer_item *item; | |
347 | struct trailer_item *previous; | |
348 | ||
349 | /* Look up item with same name */ | |
350 | for (previous = NULL, item = first_conf_item; | |
351 | item; | |
352 | previous = item, item = item->next) { | |
353 | if (!strcasecmp(item->conf.name, name)) | |
354 | return item; | |
355 | } | |
356 | ||
357 | /* Item does not already exists, create it */ | |
358 | item = xcalloc(sizeof(struct trailer_item), 1); | |
359 | duplicate_conf(&item->conf, &default_conf_info); | |
360 | item->conf.name = xstrdup(name); | |
361 | ||
362 | if (!previous) | |
363 | first_conf_item = item; | |
364 | else { | |
365 | previous->next = item; | |
366 | item->previous = previous; | |
367 | } | |
368 | ||
369 | return item; | |
370 | } | |
371 | ||
372 | enum trailer_info_type { TRAILER_KEY, TRAILER_COMMAND, TRAILER_WHERE, | |
373 | TRAILER_IF_EXISTS, TRAILER_IF_MISSING }; | |
374 | ||
375 | static struct { | |
376 | const char *name; | |
377 | enum trailer_info_type type; | |
378 | } trailer_config_items[] = { | |
379 | { "key", TRAILER_KEY }, | |
380 | { "command", TRAILER_COMMAND }, | |
381 | { "where", TRAILER_WHERE }, | |
382 | { "ifexists", TRAILER_IF_EXISTS }, | |
383 | { "ifmissing", TRAILER_IF_MISSING } | |
384 | }; | |
385 | ||
386 | static int git_trailer_default_config(const char *conf_key, const char *value, void *cb) | |
387 | { | |
388 | const char *trailer_item, *variable_name; | |
389 | ||
390 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
391 | return 0; | |
392 | ||
393 | variable_name = strrchr(trailer_item, '.'); | |
394 | if (!variable_name) { | |
395 | if (!strcmp(trailer_item, "where")) { | |
396 | if (set_where(&default_conf_info, value) < 0) | |
397 | warning(_("unknown value '%s' for key '%s'"), | |
398 | value, conf_key); | |
399 | } else if (!strcmp(trailer_item, "ifexists")) { | |
400 | if (set_if_exists(&default_conf_info, value) < 0) | |
401 | warning(_("unknown value '%s' for key '%s'"), | |
402 | value, conf_key); | |
403 | } else if (!strcmp(trailer_item, "ifmissing")) { | |
404 | if (set_if_missing(&default_conf_info, value) < 0) | |
405 | warning(_("unknown value '%s' for key '%s'"), | |
406 | value, conf_key); | |
407 | } else if (!strcmp(trailer_item, "separators")) { | |
408 | separators = xstrdup(value); | |
409 | } | |
410 | } | |
411 | return 0; | |
412 | } | |
413 | ||
414 | static int git_trailer_config(const char *conf_key, const char *value, void *cb) | |
415 | { | |
416 | const char *trailer_item, *variable_name; | |
417 | struct trailer_item *item; | |
418 | struct conf_info *conf; | |
419 | char *name = NULL; | |
420 | enum trailer_info_type type; | |
421 | int i; | |
422 | ||
423 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
424 | return 0; | |
425 | ||
426 | variable_name = strrchr(trailer_item, '.'); | |
427 | if (!variable_name) | |
428 | return 0; | |
429 | ||
430 | variable_name++; | |
431 | for (i = 0; i < ARRAY_SIZE(trailer_config_items); i++) { | |
432 | if (strcmp(trailer_config_items[i].name, variable_name)) | |
433 | continue; | |
434 | name = xstrndup(trailer_item, variable_name - trailer_item - 1); | |
435 | type = trailer_config_items[i].type; | |
436 | break; | |
437 | } | |
438 | ||
439 | if (!name) | |
440 | return 0; | |
441 | ||
442 | item = get_conf_item(name); | |
443 | conf = &item->conf; | |
444 | free(name); | |
445 | ||
446 | switch (type) { | |
447 | case TRAILER_KEY: | |
448 | if (conf->key) | |
449 | warning(_("more than one %s"), conf_key); | |
450 | conf->key = xstrdup(value); | |
451 | break; | |
452 | case TRAILER_COMMAND: | |
453 | if (conf->command) | |
454 | warning(_("more than one %s"), conf_key); | |
455 | conf->command = xstrdup(value); | |
456 | break; | |
457 | case TRAILER_WHERE: | |
458 | if (set_where(conf, value)) | |
459 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
460 | break; | |
461 | case TRAILER_IF_EXISTS: | |
462 | if (set_if_exists(conf, value)) | |
463 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
464 | break; | |
465 | case TRAILER_IF_MISSING: | |
466 | if (set_if_missing(conf, value)) | |
467 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
468 | break; | |
469 | default: | |
470 | die("internal bug in trailer.c"); | |
471 | } | |
472 | return 0; | |
473 | } | |
f0a90b4e CC |
474 | |
475 | static int parse_trailer(struct strbuf *tok, struct strbuf *val, const char *trailer) | |
476 | { | |
477 | size_t len; | |
478 | struct strbuf seps = STRBUF_INIT; | |
479 | strbuf_addstr(&seps, separators); | |
480 | strbuf_addch(&seps, '='); | |
481 | len = strcspn(trailer, seps.buf); | |
482 | strbuf_release(&seps); | |
483 | if (len == 0) | |
484 | return error(_("empty trailer token in trailer '%s'"), trailer); | |
485 | if (len < strlen(trailer)) { | |
486 | strbuf_add(tok, trailer, len); | |
487 | strbuf_trim(tok); | |
488 | strbuf_addstr(val, trailer + len + 1); | |
489 | strbuf_trim(val); | |
490 | } else { | |
491 | strbuf_addstr(tok, trailer); | |
492 | strbuf_trim(tok); | |
493 | } | |
494 | return 0; | |
495 | } | |
496 | ||
497 | static const char *token_from_item(struct trailer_item *item, char *tok) | |
498 | { | |
499 | if (item->conf.key) | |
500 | return item->conf.key; | |
501 | if (tok) | |
502 | return tok; | |
503 | return item->conf.name; | |
504 | } | |
505 | ||
506 | static struct trailer_item *new_trailer_item(struct trailer_item *conf_item, | |
507 | char *tok, char *val) | |
508 | { | |
509 | struct trailer_item *new = xcalloc(sizeof(*new), 1); | |
510 | new->value = val; | |
511 | ||
512 | if (conf_item) { | |
513 | duplicate_conf(&new->conf, &conf_item->conf); | |
514 | new->token = xstrdup(token_from_item(conf_item, tok)); | |
515 | free(tok); | |
516 | } else { | |
517 | duplicate_conf(&new->conf, &default_conf_info); | |
518 | new->token = tok; | |
519 | } | |
520 | ||
521 | return new; | |
522 | } | |
523 | ||
524 | static int token_matches_item(const char *tok, struct trailer_item *item, int tok_len) | |
525 | { | |
526 | if (!strncasecmp(tok, item->conf.name, tok_len)) | |
527 | return 1; | |
528 | return item->conf.key ? !strncasecmp(tok, item->conf.key, tok_len) : 0; | |
529 | } | |
530 | ||
531 | static struct trailer_item *create_trailer_item(const char *string) | |
532 | { | |
533 | struct strbuf tok = STRBUF_INIT; | |
534 | struct strbuf val = STRBUF_INIT; | |
535 | struct trailer_item *item; | |
536 | int tok_len; | |
537 | ||
538 | if (parse_trailer(&tok, &val, string)) | |
539 | return NULL; | |
540 | ||
541 | tok_len = token_len_without_separator(tok.buf, tok.len); | |
542 | ||
543 | /* Lookup if the token matches something in the config */ | |
544 | for (item = first_conf_item; item; item = item->next) { | |
545 | if (token_matches_item(tok.buf, item, tok_len)) | |
546 | return new_trailer_item(item, | |
547 | strbuf_detach(&tok, NULL), | |
548 | strbuf_detach(&val, NULL)); | |
549 | } | |
550 | ||
551 | return new_trailer_item(NULL, | |
552 | strbuf_detach(&tok, NULL), | |
553 | strbuf_detach(&val, NULL)); | |
554 | } | |
555 | ||
556 | static void add_trailer_item(struct trailer_item **first, | |
557 | struct trailer_item **last, | |
558 | struct trailer_item *new) | |
559 | { | |
560 | if (!new) | |
561 | return; | |
562 | if (!*last) { | |
563 | *first = new; | |
564 | *last = new; | |
565 | } else { | |
566 | (*last)->next = new; | |
567 | new->previous = *last; | |
568 | *last = new; | |
569 | } | |
570 | } | |
571 | ||
572 | static struct trailer_item *process_command_line_args(struct string_list *trailers) | |
573 | { | |
574 | struct trailer_item *arg_tok_first = NULL; | |
575 | struct trailer_item *arg_tok_last = NULL; | |
576 | struct string_list_item *tr; | |
577 | ||
578 | for_each_string_list_item(tr, trailers) { | |
579 | struct trailer_item *new = create_trailer_item(tr->string); | |
580 | add_trailer_item(&arg_tok_first, &arg_tok_last, new); | |
581 | } | |
582 | ||
583 | return arg_tok_first; | |
584 | } | |
2013d850 CC |
585 | |
586 | static struct strbuf **read_input_file(const char *file) | |
587 | { | |
588 | struct strbuf **lines; | |
589 | struct strbuf sb = STRBUF_INIT; | |
590 | ||
591 | if (file) { | |
592 | if (strbuf_read_file(&sb, file, 0) < 0) | |
593 | die_errno(_("could not read input file '%s'"), file); | |
594 | } else { | |
595 | if (strbuf_read(&sb, fileno(stdin), 0) < 0) | |
596 | die_errno(_("could not read from stdin")); | |
597 | } | |
598 | ||
599 | lines = strbuf_split(&sb, '\n'); | |
600 | ||
601 | strbuf_release(&sb); | |
602 | ||
603 | return lines; | |
604 | } | |
605 | ||
606 | /* | |
607 | * Return the (0 based) index of the start of the patch or the line | |
608 | * count if there is no patch in the message. | |
609 | */ | |
610 | static int find_patch_start(struct strbuf **lines, int count) | |
611 | { | |
612 | int i; | |
613 | ||
614 | /* Get the start of the patch part if any */ | |
615 | for (i = 0; i < count; i++) { | |
616 | if (starts_with(lines[i]->buf, "---")) | |
617 | return i; | |
618 | } | |
619 | ||
620 | return count; | |
621 | } | |
622 | ||
623 | /* | |
624 | * Return the (0 based) index of the first trailer line or count if | |
625 | * there are no trailers. Trailers are searched only in the lines from | |
626 | * index (count - 1) down to index 0. | |
627 | */ | |
628 | static int find_trailer_start(struct strbuf **lines, int count) | |
629 | { | |
630 | int start, only_spaces = 1; | |
631 | ||
632 | /* | |
633 | * Get the start of the trailers by looking starting from the end | |
634 | * for a line with only spaces before lines with one separator. | |
635 | */ | |
636 | for (start = count - 1; start >= 0; start--) { | |
637 | if (lines[start]->buf[0] == comment_line_char) | |
638 | continue; | |
639 | if (contains_only_spaces(lines[start]->buf)) { | |
640 | if (only_spaces) | |
641 | continue; | |
642 | return start + 1; | |
643 | } | |
644 | if (strcspn(lines[start]->buf, separators) < lines[start]->len) { | |
645 | if (only_spaces) | |
646 | only_spaces = 0; | |
647 | continue; | |
648 | } | |
649 | return count; | |
650 | } | |
651 | ||
652 | return only_spaces ? count : 0; | |
653 | } | |
654 | ||
655 | static int has_blank_line_before(struct strbuf **lines, int start) | |
656 | { | |
657 | for (;start >= 0; start--) { | |
658 | if (lines[start]->buf[0] == comment_line_char) | |
659 | continue; | |
660 | return contains_only_spaces(lines[start]->buf); | |
661 | } | |
662 | return 0; | |
663 | } | |
664 | ||
665 | static void print_lines(struct strbuf **lines, int start, int end) | |
666 | { | |
667 | int i; | |
668 | for (i = start; lines[i] && i < end; i++) | |
669 | printf("%s", lines[i]->buf); | |
670 | } | |
671 | ||
672 | static int process_input_file(struct strbuf **lines, | |
673 | struct trailer_item **in_tok_first, | |
674 | struct trailer_item **in_tok_last) | |
675 | { | |
676 | int count = 0; | |
677 | int patch_start, trailer_start, i; | |
678 | ||
679 | /* Get the line count */ | |
680 | while (lines[count]) | |
681 | count++; | |
682 | ||
683 | patch_start = find_patch_start(lines, count); | |
684 | trailer_start = find_trailer_start(lines, patch_start); | |
685 | ||
686 | /* Print lines before the trailers as is */ | |
687 | print_lines(lines, 0, trailer_start); | |
688 | ||
689 | if (!has_blank_line_before(lines, trailer_start - 1)) | |
690 | printf("\n"); | |
691 | ||
692 | /* Parse trailer lines */ | |
693 | for (i = trailer_start; i < patch_start; i++) { | |
694 | struct trailer_item *new = create_trailer_item(lines[i]->buf); | |
695 | add_trailer_item(in_tok_first, in_tok_last, new); | |
696 | } | |
697 | ||
698 | return patch_start; | |
699 | } |