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9385b5d7 | 1 | #include "cache.h" |
f0a90b4e | 2 | #include "string-list.h" |
85039fb6 CC |
3 | #include "run-command.h" |
4 | #include "string-list.h" | |
b1d78d77 | 5 | #include "trailer.h" |
9385b5d7 CC |
6 | /* |
7 | * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org> | |
8 | */ | |
9 | ||
10 | enum action_where { WHERE_END, WHERE_AFTER, WHERE_BEFORE, WHERE_START }; | |
11 | enum action_if_exists { EXISTS_ADD_IF_DIFFERENT_NEIGHBOR, EXISTS_ADD_IF_DIFFERENT, | |
12 | EXISTS_ADD, EXISTS_REPLACE, EXISTS_DO_NOTHING }; | |
13 | enum action_if_missing { MISSING_ADD, MISSING_DO_NOTHING }; | |
14 | ||
15 | struct conf_info { | |
16 | char *name; | |
17 | char *key; | |
18 | char *command; | |
19 | enum action_where where; | |
20 | enum action_if_exists if_exists; | |
21 | enum action_if_missing if_missing; | |
22 | }; | |
23 | ||
24 | static struct conf_info default_conf_info; | |
25 | ||
26 | struct trailer_item { | |
27 | struct trailer_item *previous; | |
28 | struct trailer_item *next; | |
29 | const char *token; | |
30 | const char *value; | |
31 | struct conf_info conf; | |
32 | }; | |
33 | ||
34 | static struct trailer_item *first_conf_item; | |
35 | ||
36 | static char *separators = ":"; | |
37 | ||
85039fb6 CC |
38 | #define TRAILER_ARG_STRING "$ARG" |
39 | ||
9385b5d7 CC |
40 | static int after_or_end(enum action_where where) |
41 | { | |
42 | return (where == WHERE_AFTER) || (where == WHERE_END); | |
43 | } | |
44 | ||
45 | /* | |
46 | * Return the length of the string not including any final | |
47 | * punctuation. E.g., the input "Signed-off-by:" would return | |
48 | * 13, stripping the trailing punctuation but retaining | |
49 | * internal punctuation. | |
50 | */ | |
51 | static size_t token_len_without_separator(const char *token, size_t len) | |
52 | { | |
53 | while (len > 0 && !isalnum(token[len - 1])) | |
54 | len--; | |
55 | return len; | |
56 | } | |
57 | ||
58 | static int same_token(struct trailer_item *a, struct trailer_item *b) | |
59 | { | |
60 | size_t a_len = token_len_without_separator(a->token, strlen(a->token)); | |
61 | size_t b_len = token_len_without_separator(b->token, strlen(b->token)); | |
62 | size_t min_len = (a_len > b_len) ? b_len : a_len; | |
63 | ||
64 | return !strncasecmp(a->token, b->token, min_len); | |
65 | } | |
66 | ||
67 | static int same_value(struct trailer_item *a, struct trailer_item *b) | |
68 | { | |
69 | return !strcasecmp(a->value, b->value); | |
70 | } | |
71 | ||
72 | static int same_trailer(struct trailer_item *a, struct trailer_item *b) | |
73 | { | |
74 | return same_token(a, b) && same_value(a, b); | |
75 | } | |
4103818d | 76 | |
2013d850 CC |
77 | static inline int contains_only_spaces(const char *str) |
78 | { | |
79 | const char *s = str; | |
80 | while (*s && isspace(*s)) | |
81 | s++; | |
82 | return !*s; | |
83 | } | |
84 | ||
85039fb6 CC |
85 | static inline void strbuf_replace(struct strbuf *sb, const char *a, const char *b) |
86 | { | |
87 | const char *ptr = strstr(sb->buf, a); | |
88 | if (ptr) | |
89 | strbuf_splice(sb, ptr - sb->buf, strlen(a), b, strlen(b)); | |
90 | } | |
91 | ||
4103818d CC |
92 | static void free_trailer_item(struct trailer_item *item) |
93 | { | |
94 | free(item->conf.name); | |
95 | free(item->conf.key); | |
96 | free(item->conf.command); | |
97 | free((char *)item->token); | |
98 | free((char *)item->value); | |
99 | free(item); | |
100 | } | |
101 | ||
b1d78d77 CC |
102 | static char last_non_space_char(const char *s) |
103 | { | |
104 | int i; | |
105 | for (i = strlen(s) - 1; i >= 0; i--) | |
106 | if (!isspace(s[i])) | |
107 | return s[i]; | |
108 | return '\0'; | |
109 | } | |
110 | ||
111 | static void print_tok_val(const char *tok, const char *val) | |
112 | { | |
113 | char c = last_non_space_char(tok); | |
114 | if (!c) | |
115 | return; | |
116 | if (strchr(separators, c)) | |
117 | printf("%s%s\n", tok, val); | |
118 | else | |
119 | printf("%s%c %s\n", tok, separators[0], val); | |
120 | } | |
121 | ||
122 | static void print_all(struct trailer_item *first, int trim_empty) | |
123 | { | |
124 | struct trailer_item *item; | |
125 | for (item = first; item; item = item->next) { | |
126 | if (!trim_empty || strlen(item->value) > 0) | |
127 | print_tok_val(item->token, item->value); | |
128 | } | |
129 | } | |
130 | ||
4103818d CC |
131 | static void update_last(struct trailer_item **last) |
132 | { | |
133 | if (*last) | |
134 | while ((*last)->next != NULL) | |
135 | *last = (*last)->next; | |
136 | } | |
137 | ||
138 | static void update_first(struct trailer_item **first) | |
139 | { | |
140 | if (*first) | |
141 | while ((*first)->previous != NULL) | |
142 | *first = (*first)->previous; | |
143 | } | |
144 | ||
145 | static void add_arg_to_input_list(struct trailer_item *on_tok, | |
146 | struct trailer_item *arg_tok, | |
147 | struct trailer_item **first, | |
148 | struct trailer_item **last) | |
149 | { | |
150 | if (after_or_end(arg_tok->conf.where)) { | |
151 | arg_tok->next = on_tok->next; | |
152 | on_tok->next = arg_tok; | |
153 | arg_tok->previous = on_tok; | |
154 | if (arg_tok->next) | |
155 | arg_tok->next->previous = arg_tok; | |
156 | update_last(last); | |
157 | } else { | |
158 | arg_tok->previous = on_tok->previous; | |
159 | on_tok->previous = arg_tok; | |
160 | arg_tok->next = on_tok; | |
161 | if (arg_tok->previous) | |
162 | arg_tok->previous->next = arg_tok; | |
163 | update_first(first); | |
164 | } | |
165 | } | |
166 | ||
167 | static int check_if_different(struct trailer_item *in_tok, | |
168 | struct trailer_item *arg_tok, | |
169 | int check_all) | |
170 | { | |
171 | enum action_where where = arg_tok->conf.where; | |
172 | do { | |
173 | if (!in_tok) | |
174 | return 1; | |
175 | if (same_trailer(in_tok, arg_tok)) | |
176 | return 0; | |
177 | /* | |
178 | * if we want to add a trailer after another one, | |
179 | * we have to check those before this one | |
180 | */ | |
181 | in_tok = after_or_end(where) ? in_tok->previous : in_tok->next; | |
182 | } while (check_all); | |
183 | return 1; | |
184 | } | |
185 | ||
186 | static void remove_from_list(struct trailer_item *item, | |
187 | struct trailer_item **first, | |
188 | struct trailer_item **last) | |
189 | { | |
190 | struct trailer_item *next = item->next; | |
191 | struct trailer_item *previous = item->previous; | |
192 | ||
193 | if (next) { | |
194 | item->next->previous = previous; | |
195 | item->next = NULL; | |
196 | } else if (last) | |
197 | *last = previous; | |
198 | ||
199 | if (previous) { | |
200 | item->previous->next = next; | |
201 | item->previous = NULL; | |
202 | } else if (first) | |
203 | *first = next; | |
204 | } | |
205 | ||
206 | static struct trailer_item *remove_first(struct trailer_item **first) | |
207 | { | |
208 | struct trailer_item *item = *first; | |
209 | *first = item->next; | |
210 | if (item->next) { | |
211 | item->next->previous = NULL; | |
212 | item->next = NULL; | |
213 | } | |
214 | return item; | |
215 | } | |
216 | ||
85039fb6 CC |
217 | static int read_from_command(struct child_process *cp, struct strbuf *buf) |
218 | { | |
219 | if (run_command(cp)) | |
220 | return error("running trailer command '%s' failed", cp->argv[0]); | |
221 | if (strbuf_read(buf, cp->out, 1024) < 1) | |
222 | return error("reading from trailer command '%s' failed", cp->argv[0]); | |
223 | strbuf_trim(buf); | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static const char *apply_command(const char *command, const char *arg) | |
228 | { | |
229 | struct strbuf cmd = STRBUF_INIT; | |
230 | struct strbuf buf = STRBUF_INIT; | |
b226293b | 231 | struct child_process cp = CHILD_PROCESS_INIT; |
85039fb6 CC |
232 | const char *argv[] = {NULL, NULL}; |
233 | const char *result; | |
234 | ||
235 | strbuf_addstr(&cmd, command); | |
236 | if (arg) | |
237 | strbuf_replace(&cmd, TRAILER_ARG_STRING, arg); | |
238 | ||
239 | argv[0] = cmd.buf; | |
85039fb6 CC |
240 | cp.argv = argv; |
241 | cp.env = local_repo_env; | |
242 | cp.no_stdin = 1; | |
243 | cp.out = -1; | |
244 | cp.use_shell = 1; | |
245 | ||
246 | if (read_from_command(&cp, &buf)) { | |
247 | strbuf_release(&buf); | |
248 | result = xstrdup(""); | |
249 | } else | |
250 | result = strbuf_detach(&buf, NULL); | |
251 | ||
252 | strbuf_release(&cmd); | |
253 | return result; | |
254 | } | |
255 | ||
256 | static void apply_item_command(struct trailer_item *in_tok, struct trailer_item *arg_tok) | |
257 | { | |
258 | if (arg_tok->conf.command) { | |
259 | const char *arg; | |
260 | if (arg_tok->value && arg_tok->value[0]) { | |
261 | arg = arg_tok->value; | |
262 | } else { | |
263 | if (in_tok && in_tok->value) | |
264 | arg = xstrdup(in_tok->value); | |
265 | else | |
266 | arg = xstrdup(""); | |
267 | } | |
268 | arg_tok->value = apply_command(arg_tok->conf.command, arg); | |
269 | free((char *)arg); | |
270 | } | |
271 | } | |
272 | ||
4103818d CC |
273 | static void apply_arg_if_exists(struct trailer_item *in_tok, |
274 | struct trailer_item *arg_tok, | |
275 | struct trailer_item *on_tok, | |
276 | struct trailer_item **in_tok_first, | |
277 | struct trailer_item **in_tok_last) | |
278 | { | |
279 | switch (arg_tok->conf.if_exists) { | |
280 | case EXISTS_DO_NOTHING: | |
281 | free_trailer_item(arg_tok); | |
282 | break; | |
283 | case EXISTS_REPLACE: | |
85039fb6 | 284 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
285 | add_arg_to_input_list(on_tok, arg_tok, |
286 | in_tok_first, in_tok_last); | |
287 | remove_from_list(in_tok, in_tok_first, in_tok_last); | |
288 | free_trailer_item(in_tok); | |
289 | break; | |
290 | case EXISTS_ADD: | |
85039fb6 | 291 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
292 | add_arg_to_input_list(on_tok, arg_tok, |
293 | in_tok_first, in_tok_last); | |
294 | break; | |
295 | case EXISTS_ADD_IF_DIFFERENT: | |
85039fb6 | 296 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
297 | if (check_if_different(in_tok, arg_tok, 1)) |
298 | add_arg_to_input_list(on_tok, arg_tok, | |
299 | in_tok_first, in_tok_last); | |
300 | else | |
301 | free_trailer_item(arg_tok); | |
302 | break; | |
303 | case EXISTS_ADD_IF_DIFFERENT_NEIGHBOR: | |
85039fb6 | 304 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
305 | if (check_if_different(on_tok, arg_tok, 0)) |
306 | add_arg_to_input_list(on_tok, arg_tok, | |
307 | in_tok_first, in_tok_last); | |
308 | else | |
309 | free_trailer_item(arg_tok); | |
310 | break; | |
311 | } | |
312 | } | |
313 | ||
314 | static void apply_arg_if_missing(struct trailer_item **in_tok_first, | |
315 | struct trailer_item **in_tok_last, | |
316 | struct trailer_item *arg_tok) | |
317 | { | |
318 | struct trailer_item **in_tok; | |
319 | enum action_where where; | |
320 | ||
321 | switch (arg_tok->conf.if_missing) { | |
322 | case MISSING_DO_NOTHING: | |
323 | free_trailer_item(arg_tok); | |
324 | break; | |
325 | case MISSING_ADD: | |
326 | where = arg_tok->conf.where; | |
327 | in_tok = after_or_end(where) ? in_tok_last : in_tok_first; | |
85039fb6 | 328 | apply_item_command(NULL, arg_tok); |
4103818d CC |
329 | if (*in_tok) { |
330 | add_arg_to_input_list(*in_tok, arg_tok, | |
331 | in_tok_first, in_tok_last); | |
332 | } else { | |
333 | *in_tok_first = arg_tok; | |
334 | *in_tok_last = arg_tok; | |
335 | } | |
336 | break; | |
337 | } | |
338 | } | |
339 | ||
340 | static int find_same_and_apply_arg(struct trailer_item **in_tok_first, | |
341 | struct trailer_item **in_tok_last, | |
342 | struct trailer_item *arg_tok) | |
343 | { | |
344 | struct trailer_item *in_tok; | |
345 | struct trailer_item *on_tok; | |
346 | struct trailer_item *following_tok; | |
347 | ||
348 | enum action_where where = arg_tok->conf.where; | |
349 | int middle = (where == WHERE_AFTER) || (where == WHERE_BEFORE); | |
350 | int backwards = after_or_end(where); | |
351 | struct trailer_item *start_tok = backwards ? *in_tok_last : *in_tok_first; | |
352 | ||
353 | for (in_tok = start_tok; in_tok; in_tok = following_tok) { | |
354 | following_tok = backwards ? in_tok->previous : in_tok->next; | |
355 | if (!same_token(in_tok, arg_tok)) | |
356 | continue; | |
357 | on_tok = middle ? in_tok : start_tok; | |
358 | apply_arg_if_exists(in_tok, arg_tok, on_tok, | |
359 | in_tok_first, in_tok_last); | |
360 | return 1; | |
361 | } | |
362 | return 0; | |
363 | } | |
364 | ||
365 | static void process_trailers_lists(struct trailer_item **in_tok_first, | |
366 | struct trailer_item **in_tok_last, | |
367 | struct trailer_item **arg_tok_first) | |
368 | { | |
369 | struct trailer_item *arg_tok; | |
370 | struct trailer_item *next_arg; | |
371 | ||
372 | if (!*arg_tok_first) | |
373 | return; | |
374 | ||
375 | for (arg_tok = *arg_tok_first; arg_tok; arg_tok = next_arg) { | |
376 | int applied = 0; | |
377 | ||
378 | next_arg = arg_tok->next; | |
379 | remove_from_list(arg_tok, arg_tok_first, NULL); | |
380 | ||
381 | applied = find_same_and_apply_arg(in_tok_first, | |
382 | in_tok_last, | |
383 | arg_tok); | |
384 | ||
385 | if (!applied) | |
386 | apply_arg_if_missing(in_tok_first, | |
387 | in_tok_last, | |
388 | arg_tok); | |
389 | } | |
390 | } | |
46a0613f CC |
391 | |
392 | static int set_where(struct conf_info *item, const char *value) | |
393 | { | |
394 | if (!strcasecmp("after", value)) | |
395 | item->where = WHERE_AFTER; | |
396 | else if (!strcasecmp("before", value)) | |
397 | item->where = WHERE_BEFORE; | |
398 | else if (!strcasecmp("end", value)) | |
399 | item->where = WHERE_END; | |
400 | else if (!strcasecmp("start", value)) | |
401 | item->where = WHERE_START; | |
402 | else | |
403 | return -1; | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static int set_if_exists(struct conf_info *item, const char *value) | |
408 | { | |
409 | if (!strcasecmp("addIfDifferent", value)) | |
410 | item->if_exists = EXISTS_ADD_IF_DIFFERENT; | |
411 | else if (!strcasecmp("addIfDifferentNeighbor", value)) | |
412 | item->if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR; | |
413 | else if (!strcasecmp("add", value)) | |
414 | item->if_exists = EXISTS_ADD; | |
415 | else if (!strcasecmp("replace", value)) | |
416 | item->if_exists = EXISTS_REPLACE; | |
417 | else if (!strcasecmp("doNothing", value)) | |
418 | item->if_exists = EXISTS_DO_NOTHING; | |
419 | else | |
420 | return -1; | |
421 | return 0; | |
422 | } | |
423 | ||
424 | static int set_if_missing(struct conf_info *item, const char *value) | |
425 | { | |
426 | if (!strcasecmp("doNothing", value)) | |
427 | item->if_missing = MISSING_DO_NOTHING; | |
428 | else if (!strcasecmp("add", value)) | |
429 | item->if_missing = MISSING_ADD; | |
430 | else | |
431 | return -1; | |
432 | return 0; | |
433 | } | |
434 | ||
435 | static void duplicate_conf(struct conf_info *dst, struct conf_info *src) | |
436 | { | |
437 | *dst = *src; | |
438 | if (src->name) | |
439 | dst->name = xstrdup(src->name); | |
440 | if (src->key) | |
441 | dst->key = xstrdup(src->key); | |
442 | if (src->command) | |
443 | dst->command = xstrdup(src->command); | |
444 | } | |
445 | ||
446 | static struct trailer_item *get_conf_item(const char *name) | |
447 | { | |
448 | struct trailer_item *item; | |
449 | struct trailer_item *previous; | |
450 | ||
451 | /* Look up item with same name */ | |
452 | for (previous = NULL, item = first_conf_item; | |
453 | item; | |
454 | previous = item, item = item->next) { | |
455 | if (!strcasecmp(item->conf.name, name)) | |
456 | return item; | |
457 | } | |
458 | ||
459 | /* Item does not already exists, create it */ | |
460 | item = xcalloc(sizeof(struct trailer_item), 1); | |
461 | duplicate_conf(&item->conf, &default_conf_info); | |
462 | item->conf.name = xstrdup(name); | |
463 | ||
464 | if (!previous) | |
465 | first_conf_item = item; | |
466 | else { | |
467 | previous->next = item; | |
468 | item->previous = previous; | |
469 | } | |
470 | ||
471 | return item; | |
472 | } | |
473 | ||
474 | enum trailer_info_type { TRAILER_KEY, TRAILER_COMMAND, TRAILER_WHERE, | |
475 | TRAILER_IF_EXISTS, TRAILER_IF_MISSING }; | |
476 | ||
477 | static struct { | |
478 | const char *name; | |
479 | enum trailer_info_type type; | |
480 | } trailer_config_items[] = { | |
481 | { "key", TRAILER_KEY }, | |
482 | { "command", TRAILER_COMMAND }, | |
483 | { "where", TRAILER_WHERE }, | |
484 | { "ifexists", TRAILER_IF_EXISTS }, | |
485 | { "ifmissing", TRAILER_IF_MISSING } | |
486 | }; | |
487 | ||
488 | static int git_trailer_default_config(const char *conf_key, const char *value, void *cb) | |
489 | { | |
490 | const char *trailer_item, *variable_name; | |
491 | ||
492 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
493 | return 0; | |
494 | ||
495 | variable_name = strrchr(trailer_item, '.'); | |
496 | if (!variable_name) { | |
497 | if (!strcmp(trailer_item, "where")) { | |
498 | if (set_where(&default_conf_info, value) < 0) | |
499 | warning(_("unknown value '%s' for key '%s'"), | |
500 | value, conf_key); | |
501 | } else if (!strcmp(trailer_item, "ifexists")) { | |
502 | if (set_if_exists(&default_conf_info, value) < 0) | |
503 | warning(_("unknown value '%s' for key '%s'"), | |
504 | value, conf_key); | |
505 | } else if (!strcmp(trailer_item, "ifmissing")) { | |
506 | if (set_if_missing(&default_conf_info, value) < 0) | |
507 | warning(_("unknown value '%s' for key '%s'"), | |
508 | value, conf_key); | |
509 | } else if (!strcmp(trailer_item, "separators")) { | |
510 | separators = xstrdup(value); | |
511 | } | |
512 | } | |
513 | return 0; | |
514 | } | |
515 | ||
516 | static int git_trailer_config(const char *conf_key, const char *value, void *cb) | |
517 | { | |
518 | const char *trailer_item, *variable_name; | |
519 | struct trailer_item *item; | |
520 | struct conf_info *conf; | |
521 | char *name = NULL; | |
522 | enum trailer_info_type type; | |
523 | int i; | |
524 | ||
525 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
526 | return 0; | |
527 | ||
528 | variable_name = strrchr(trailer_item, '.'); | |
529 | if (!variable_name) | |
530 | return 0; | |
531 | ||
532 | variable_name++; | |
533 | for (i = 0; i < ARRAY_SIZE(trailer_config_items); i++) { | |
534 | if (strcmp(trailer_config_items[i].name, variable_name)) | |
535 | continue; | |
536 | name = xstrndup(trailer_item, variable_name - trailer_item - 1); | |
537 | type = trailer_config_items[i].type; | |
538 | break; | |
539 | } | |
540 | ||
541 | if (!name) | |
542 | return 0; | |
543 | ||
544 | item = get_conf_item(name); | |
545 | conf = &item->conf; | |
546 | free(name); | |
547 | ||
548 | switch (type) { | |
549 | case TRAILER_KEY: | |
550 | if (conf->key) | |
551 | warning(_("more than one %s"), conf_key); | |
552 | conf->key = xstrdup(value); | |
553 | break; | |
554 | case TRAILER_COMMAND: | |
555 | if (conf->command) | |
556 | warning(_("more than one %s"), conf_key); | |
557 | conf->command = xstrdup(value); | |
558 | break; | |
559 | case TRAILER_WHERE: | |
560 | if (set_where(conf, value)) | |
561 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
562 | break; | |
563 | case TRAILER_IF_EXISTS: | |
564 | if (set_if_exists(conf, value)) | |
565 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
566 | break; | |
567 | case TRAILER_IF_MISSING: | |
568 | if (set_if_missing(conf, value)) | |
569 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
570 | break; | |
571 | default: | |
572 | die("internal bug in trailer.c"); | |
573 | } | |
574 | return 0; | |
575 | } | |
f0a90b4e CC |
576 | |
577 | static int parse_trailer(struct strbuf *tok, struct strbuf *val, const char *trailer) | |
578 | { | |
579 | size_t len; | |
580 | struct strbuf seps = STRBUF_INIT; | |
581 | strbuf_addstr(&seps, separators); | |
582 | strbuf_addch(&seps, '='); | |
583 | len = strcspn(trailer, seps.buf); | |
584 | strbuf_release(&seps); | |
d52adf1f CC |
585 | if (len == 0) { |
586 | int l = strlen(trailer); | |
587 | while (l > 0 && isspace(trailer[l - 1])) | |
588 | l--; | |
589 | return error(_("empty trailer token in trailer '%.*s'"), l, trailer); | |
590 | } | |
f0a90b4e CC |
591 | if (len < strlen(trailer)) { |
592 | strbuf_add(tok, trailer, len); | |
593 | strbuf_trim(tok); | |
594 | strbuf_addstr(val, trailer + len + 1); | |
595 | strbuf_trim(val); | |
596 | } else { | |
597 | strbuf_addstr(tok, trailer); | |
598 | strbuf_trim(tok); | |
599 | } | |
600 | return 0; | |
601 | } | |
602 | ||
603 | static const char *token_from_item(struct trailer_item *item, char *tok) | |
604 | { | |
605 | if (item->conf.key) | |
606 | return item->conf.key; | |
607 | if (tok) | |
608 | return tok; | |
609 | return item->conf.name; | |
610 | } | |
611 | ||
612 | static struct trailer_item *new_trailer_item(struct trailer_item *conf_item, | |
613 | char *tok, char *val) | |
614 | { | |
615 | struct trailer_item *new = xcalloc(sizeof(*new), 1); | |
85039fb6 | 616 | new->value = val ? val : xstrdup(""); |
f0a90b4e CC |
617 | |
618 | if (conf_item) { | |
619 | duplicate_conf(&new->conf, &conf_item->conf); | |
620 | new->token = xstrdup(token_from_item(conf_item, tok)); | |
621 | free(tok); | |
622 | } else { | |
623 | duplicate_conf(&new->conf, &default_conf_info); | |
624 | new->token = tok; | |
625 | } | |
626 | ||
627 | return new; | |
628 | } | |
629 | ||
630 | static int token_matches_item(const char *tok, struct trailer_item *item, int tok_len) | |
631 | { | |
632 | if (!strncasecmp(tok, item->conf.name, tok_len)) | |
633 | return 1; | |
634 | return item->conf.key ? !strncasecmp(tok, item->conf.key, tok_len) : 0; | |
635 | } | |
636 | ||
637 | static struct trailer_item *create_trailer_item(const char *string) | |
638 | { | |
639 | struct strbuf tok = STRBUF_INIT; | |
640 | struct strbuf val = STRBUF_INIT; | |
641 | struct trailer_item *item; | |
642 | int tok_len; | |
643 | ||
644 | if (parse_trailer(&tok, &val, string)) | |
645 | return NULL; | |
646 | ||
647 | tok_len = token_len_without_separator(tok.buf, tok.len); | |
648 | ||
649 | /* Lookup if the token matches something in the config */ | |
650 | for (item = first_conf_item; item; item = item->next) { | |
651 | if (token_matches_item(tok.buf, item, tok_len)) | |
652 | return new_trailer_item(item, | |
653 | strbuf_detach(&tok, NULL), | |
654 | strbuf_detach(&val, NULL)); | |
655 | } | |
656 | ||
657 | return new_trailer_item(NULL, | |
658 | strbuf_detach(&tok, NULL), | |
659 | strbuf_detach(&val, NULL)); | |
660 | } | |
661 | ||
662 | static void add_trailer_item(struct trailer_item **first, | |
663 | struct trailer_item **last, | |
664 | struct trailer_item *new) | |
665 | { | |
666 | if (!new) | |
667 | return; | |
668 | if (!*last) { | |
669 | *first = new; | |
670 | *last = new; | |
671 | } else { | |
672 | (*last)->next = new; | |
673 | new->previous = *last; | |
674 | *last = new; | |
675 | } | |
676 | } | |
677 | ||
678 | static struct trailer_item *process_command_line_args(struct string_list *trailers) | |
679 | { | |
680 | struct trailer_item *arg_tok_first = NULL; | |
681 | struct trailer_item *arg_tok_last = NULL; | |
682 | struct string_list_item *tr; | |
85039fb6 CC |
683 | struct trailer_item *item; |
684 | ||
685 | /* Add a trailer item for each configured trailer with a command */ | |
686 | for (item = first_conf_item; item; item = item->next) { | |
687 | if (item->conf.command) { | |
688 | struct trailer_item *new = new_trailer_item(item, NULL, NULL); | |
689 | add_trailer_item(&arg_tok_first, &arg_tok_last, new); | |
690 | } | |
691 | } | |
f0a90b4e | 692 | |
85039fb6 | 693 | /* Add a trailer item for each trailer on the command line */ |
f0a90b4e CC |
694 | for_each_string_list_item(tr, trailers) { |
695 | struct trailer_item *new = create_trailer_item(tr->string); | |
696 | add_trailer_item(&arg_tok_first, &arg_tok_last, new); | |
697 | } | |
698 | ||
699 | return arg_tok_first; | |
700 | } | |
2013d850 CC |
701 | |
702 | static struct strbuf **read_input_file(const char *file) | |
703 | { | |
704 | struct strbuf **lines; | |
705 | struct strbuf sb = STRBUF_INIT; | |
706 | ||
707 | if (file) { | |
708 | if (strbuf_read_file(&sb, file, 0) < 0) | |
709 | die_errno(_("could not read input file '%s'"), file); | |
710 | } else { | |
711 | if (strbuf_read(&sb, fileno(stdin), 0) < 0) | |
712 | die_errno(_("could not read from stdin")); | |
713 | } | |
714 | ||
715 | lines = strbuf_split(&sb, '\n'); | |
716 | ||
717 | strbuf_release(&sb); | |
718 | ||
719 | return lines; | |
720 | } | |
721 | ||
722 | /* | |
723 | * Return the (0 based) index of the start of the patch or the line | |
724 | * count if there is no patch in the message. | |
725 | */ | |
726 | static int find_patch_start(struct strbuf **lines, int count) | |
727 | { | |
728 | int i; | |
729 | ||
730 | /* Get the start of the patch part if any */ | |
731 | for (i = 0; i < count; i++) { | |
732 | if (starts_with(lines[i]->buf, "---")) | |
733 | return i; | |
734 | } | |
735 | ||
736 | return count; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Return the (0 based) index of the first trailer line or count if | |
741 | * there are no trailers. Trailers are searched only in the lines from | |
742 | * index (count - 1) down to index 0. | |
743 | */ | |
744 | static int find_trailer_start(struct strbuf **lines, int count) | |
745 | { | |
746 | int start, only_spaces = 1; | |
747 | ||
748 | /* | |
749 | * Get the start of the trailers by looking starting from the end | |
750 | * for a line with only spaces before lines with one separator. | |
751 | */ | |
752 | for (start = count - 1; start >= 0; start--) { | |
753 | if (lines[start]->buf[0] == comment_line_char) | |
754 | continue; | |
755 | if (contains_only_spaces(lines[start]->buf)) { | |
756 | if (only_spaces) | |
757 | continue; | |
758 | return start + 1; | |
759 | } | |
760 | if (strcspn(lines[start]->buf, separators) < lines[start]->len) { | |
761 | if (only_spaces) | |
762 | only_spaces = 0; | |
763 | continue; | |
764 | } | |
765 | return count; | |
766 | } | |
767 | ||
768 | return only_spaces ? count : 0; | |
769 | } | |
770 | ||
771 | static int has_blank_line_before(struct strbuf **lines, int start) | |
772 | { | |
773 | for (;start >= 0; start--) { | |
774 | if (lines[start]->buf[0] == comment_line_char) | |
775 | continue; | |
776 | return contains_only_spaces(lines[start]->buf); | |
777 | } | |
778 | return 0; | |
779 | } | |
780 | ||
781 | static void print_lines(struct strbuf **lines, int start, int end) | |
782 | { | |
783 | int i; | |
784 | for (i = start; lines[i] && i < end; i++) | |
785 | printf("%s", lines[i]->buf); | |
786 | } | |
787 | ||
788 | static int process_input_file(struct strbuf **lines, | |
789 | struct trailer_item **in_tok_first, | |
790 | struct trailer_item **in_tok_last) | |
791 | { | |
792 | int count = 0; | |
793 | int patch_start, trailer_start, i; | |
794 | ||
795 | /* Get the line count */ | |
796 | while (lines[count]) | |
797 | count++; | |
798 | ||
799 | patch_start = find_patch_start(lines, count); | |
800 | trailer_start = find_trailer_start(lines, patch_start); | |
801 | ||
802 | /* Print lines before the trailers as is */ | |
803 | print_lines(lines, 0, trailer_start); | |
804 | ||
805 | if (!has_blank_line_before(lines, trailer_start - 1)) | |
806 | printf("\n"); | |
807 | ||
808 | /* Parse trailer lines */ | |
809 | for (i = trailer_start; i < patch_start; i++) { | |
2887103b CC |
810 | if (lines[i]->buf[0] != comment_line_char) { |
811 | struct trailer_item *new = create_trailer_item(lines[i]->buf); | |
812 | add_trailer_item(in_tok_first, in_tok_last, new); | |
813 | } | |
2013d850 CC |
814 | } |
815 | ||
816 | return patch_start; | |
817 | } | |
b1d78d77 CC |
818 | |
819 | static void free_all(struct trailer_item **first) | |
820 | { | |
821 | while (*first) { | |
822 | struct trailer_item *item = remove_first(first); | |
823 | free_trailer_item(item); | |
824 | } | |
825 | } | |
826 | ||
827 | void process_trailers(const char *file, int trim_empty, struct string_list *trailers) | |
828 | { | |
829 | struct trailer_item *in_tok_first = NULL; | |
830 | struct trailer_item *in_tok_last = NULL; | |
831 | struct trailer_item *arg_tok_first; | |
832 | struct strbuf **lines; | |
833 | int patch_start; | |
834 | ||
835 | /* Default config must be setup first */ | |
836 | git_config(git_trailer_default_config, NULL); | |
837 | git_config(git_trailer_config, NULL); | |
838 | ||
839 | lines = read_input_file(file); | |
840 | ||
841 | /* Print the lines before the trailers */ | |
842 | patch_start = process_input_file(lines, &in_tok_first, &in_tok_last); | |
843 | ||
844 | arg_tok_first = process_command_line_args(trailers); | |
845 | ||
846 | process_trailers_lists(&in_tok_first, &in_tok_last, &arg_tok_first); | |
847 | ||
848 | print_all(in_tok_first, trim_empty); | |
849 | ||
850 | free_all(&in_tok_first); | |
851 | ||
852 | /* Print the lines after the trailers as is */ | |
853 | print_lines(lines, patch_start, INT_MAX); | |
854 | ||
855 | strbuf_list_free(lines); | |
856 | } |