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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" |
9385b5d7 CC |
7 | /* |
8 | * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org> | |
9 | */ | |
10 | ||
11 | enum action_where { WHERE_END, WHERE_AFTER, WHERE_BEFORE, WHERE_START }; | |
12 | enum action_if_exists { EXISTS_ADD_IF_DIFFERENT_NEIGHBOR, EXISTS_ADD_IF_DIFFERENT, | |
13 | EXISTS_ADD, EXISTS_REPLACE, EXISTS_DO_NOTHING }; | |
14 | enum action_if_missing { MISSING_ADD, MISSING_DO_NOTHING }; | |
15 | ||
16 | struct conf_info { | |
17 | char *name; | |
18 | char *key; | |
19 | char *command; | |
20 | enum action_where where; | |
21 | enum action_if_exists if_exists; | |
22 | enum action_if_missing if_missing; | |
23 | }; | |
24 | ||
25 | static struct conf_info default_conf_info; | |
26 | ||
27 | struct trailer_item { | |
28 | struct trailer_item *previous; | |
29 | struct trailer_item *next; | |
30 | const char *token; | |
31 | const char *value; | |
32 | struct conf_info conf; | |
33 | }; | |
34 | ||
35 | static struct trailer_item *first_conf_item; | |
36 | ||
37 | static char *separators = ":"; | |
38 | ||
85039fb6 CC |
39 | #define TRAILER_ARG_STRING "$ARG" |
40 | ||
9385b5d7 CC |
41 | static int after_or_end(enum action_where where) |
42 | { | |
43 | return (where == WHERE_AFTER) || (where == WHERE_END); | |
44 | } | |
45 | ||
46 | /* | |
47 | * Return the length of the string not including any final | |
48 | * punctuation. E.g., the input "Signed-off-by:" would return | |
49 | * 13, stripping the trailing punctuation but retaining | |
50 | * internal punctuation. | |
51 | */ | |
52 | static size_t token_len_without_separator(const char *token, size_t len) | |
53 | { | |
54 | while (len > 0 && !isalnum(token[len - 1])) | |
55 | len--; | |
56 | return len; | |
57 | } | |
58 | ||
59 | static int same_token(struct trailer_item *a, struct trailer_item *b) | |
60 | { | |
61 | size_t a_len = token_len_without_separator(a->token, strlen(a->token)); | |
62 | size_t b_len = token_len_without_separator(b->token, strlen(b->token)); | |
63 | size_t min_len = (a_len > b_len) ? b_len : a_len; | |
64 | ||
65 | return !strncasecmp(a->token, b->token, min_len); | |
66 | } | |
67 | ||
68 | static int same_value(struct trailer_item *a, struct trailer_item *b) | |
69 | { | |
70 | return !strcasecmp(a->value, b->value); | |
71 | } | |
72 | ||
73 | static int same_trailer(struct trailer_item *a, struct trailer_item *b) | |
74 | { | |
75 | return same_token(a, b) && same_value(a, b); | |
76 | } | |
4103818d | 77 | |
2013d850 CC |
78 | static inline int contains_only_spaces(const char *str) |
79 | { | |
80 | const char *s = str; | |
81 | while (*s && isspace(*s)) | |
82 | s++; | |
83 | return !*s; | |
84 | } | |
85 | ||
85039fb6 CC |
86 | static inline void strbuf_replace(struct strbuf *sb, const char *a, const char *b) |
87 | { | |
88 | const char *ptr = strstr(sb->buf, a); | |
89 | if (ptr) | |
90 | strbuf_splice(sb, ptr - sb->buf, strlen(a), b, strlen(b)); | |
91 | } | |
92 | ||
4103818d CC |
93 | static void free_trailer_item(struct trailer_item *item) |
94 | { | |
95 | free(item->conf.name); | |
96 | free(item->conf.key); | |
97 | free(item->conf.command); | |
98 | free((char *)item->token); | |
99 | free((char *)item->value); | |
100 | free(item); | |
101 | } | |
102 | ||
b1d78d77 CC |
103 | static char last_non_space_char(const char *s) |
104 | { | |
105 | int i; | |
106 | for (i = strlen(s) - 1; i >= 0; i--) | |
107 | if (!isspace(s[i])) | |
108 | return s[i]; | |
109 | return '\0'; | |
110 | } | |
111 | ||
d0d2344a | 112 | static void print_tok_val(FILE *outfile, const char *tok, const char *val) |
b1d78d77 CC |
113 | { |
114 | char c = last_non_space_char(tok); | |
115 | if (!c) | |
116 | return; | |
117 | if (strchr(separators, c)) | |
d0d2344a | 118 | fprintf(outfile, "%s%s\n", tok, val); |
b1d78d77 | 119 | else |
d0d2344a | 120 | fprintf(outfile, "%s%c %s\n", tok, separators[0], val); |
b1d78d77 CC |
121 | } |
122 | ||
d0d2344a | 123 | static void print_all(FILE *outfile, struct trailer_item *first, int trim_empty) |
b1d78d77 CC |
124 | { |
125 | struct trailer_item *item; | |
126 | for (item = first; item; item = item->next) { | |
127 | if (!trim_empty || strlen(item->value) > 0) | |
d0d2344a | 128 | print_tok_val(outfile, item->token, item->value); |
b1d78d77 CC |
129 | } |
130 | } | |
131 | ||
4103818d CC |
132 | static void update_last(struct trailer_item **last) |
133 | { | |
134 | if (*last) | |
135 | while ((*last)->next != NULL) | |
136 | *last = (*last)->next; | |
137 | } | |
138 | ||
139 | static void update_first(struct trailer_item **first) | |
140 | { | |
141 | if (*first) | |
142 | while ((*first)->previous != NULL) | |
143 | *first = (*first)->previous; | |
144 | } | |
145 | ||
146 | static void add_arg_to_input_list(struct trailer_item *on_tok, | |
147 | struct trailer_item *arg_tok, | |
148 | struct trailer_item **first, | |
149 | struct trailer_item **last) | |
150 | { | |
151 | if (after_or_end(arg_tok->conf.where)) { | |
152 | arg_tok->next = on_tok->next; | |
153 | on_tok->next = arg_tok; | |
154 | arg_tok->previous = on_tok; | |
155 | if (arg_tok->next) | |
156 | arg_tok->next->previous = arg_tok; | |
157 | update_last(last); | |
158 | } else { | |
159 | arg_tok->previous = on_tok->previous; | |
160 | on_tok->previous = arg_tok; | |
161 | arg_tok->next = on_tok; | |
162 | if (arg_tok->previous) | |
163 | arg_tok->previous->next = arg_tok; | |
164 | update_first(first); | |
165 | } | |
166 | } | |
167 | ||
168 | static int check_if_different(struct trailer_item *in_tok, | |
169 | struct trailer_item *arg_tok, | |
170 | int check_all) | |
171 | { | |
172 | enum action_where where = arg_tok->conf.where; | |
173 | do { | |
174 | if (!in_tok) | |
175 | return 1; | |
176 | if (same_trailer(in_tok, arg_tok)) | |
177 | return 0; | |
178 | /* | |
179 | * if we want to add a trailer after another one, | |
180 | * we have to check those before this one | |
181 | */ | |
182 | in_tok = after_or_end(where) ? in_tok->previous : in_tok->next; | |
183 | } while (check_all); | |
184 | return 1; | |
185 | } | |
186 | ||
187 | static void remove_from_list(struct trailer_item *item, | |
188 | struct trailer_item **first, | |
189 | struct trailer_item **last) | |
190 | { | |
191 | struct trailer_item *next = item->next; | |
192 | struct trailer_item *previous = item->previous; | |
193 | ||
194 | if (next) { | |
195 | item->next->previous = previous; | |
196 | item->next = NULL; | |
197 | } else if (last) | |
198 | *last = previous; | |
199 | ||
200 | if (previous) { | |
201 | item->previous->next = next; | |
202 | item->previous = NULL; | |
203 | } else if (first) | |
204 | *first = next; | |
205 | } | |
206 | ||
207 | static struct trailer_item *remove_first(struct trailer_item **first) | |
208 | { | |
209 | struct trailer_item *item = *first; | |
210 | *first = item->next; | |
211 | if (item->next) { | |
212 | item->next->previous = NULL; | |
213 | item->next = NULL; | |
214 | } | |
215 | return item; | |
216 | } | |
217 | ||
85039fb6 CC |
218 | static const char *apply_command(const char *command, const char *arg) |
219 | { | |
220 | struct strbuf cmd = STRBUF_INIT; | |
221 | struct strbuf buf = STRBUF_INIT; | |
b226293b | 222 | struct child_process cp = CHILD_PROCESS_INIT; |
85039fb6 CC |
223 | const char *argv[] = {NULL, NULL}; |
224 | const char *result; | |
225 | ||
226 | strbuf_addstr(&cmd, command); | |
227 | if (arg) | |
228 | strbuf_replace(&cmd, TRAILER_ARG_STRING, arg); | |
229 | ||
230 | argv[0] = cmd.buf; | |
85039fb6 CC |
231 | cp.argv = argv; |
232 | cp.env = local_repo_env; | |
233 | cp.no_stdin = 1; | |
85039fb6 CC |
234 | cp.use_shell = 1; |
235 | ||
c5eadcaa | 236 | if (capture_command(&cp, &buf, 1024)) { |
13ad56f8 | 237 | error(_("running trailer command '%s' failed"), cmd.buf); |
85039fb6 CC |
238 | strbuf_release(&buf); |
239 | result = xstrdup(""); | |
c5eadcaa JK |
240 | } else { |
241 | strbuf_trim(&buf); | |
85039fb6 | 242 | result = strbuf_detach(&buf, NULL); |
c5eadcaa | 243 | } |
85039fb6 CC |
244 | |
245 | strbuf_release(&cmd); | |
246 | return result; | |
247 | } | |
248 | ||
249 | static void apply_item_command(struct trailer_item *in_tok, struct trailer_item *arg_tok) | |
250 | { | |
251 | if (arg_tok->conf.command) { | |
252 | const char *arg; | |
253 | if (arg_tok->value && arg_tok->value[0]) { | |
254 | arg = arg_tok->value; | |
255 | } else { | |
256 | if (in_tok && in_tok->value) | |
257 | arg = xstrdup(in_tok->value); | |
258 | else | |
259 | arg = xstrdup(""); | |
260 | } | |
261 | arg_tok->value = apply_command(arg_tok->conf.command, arg); | |
262 | free((char *)arg); | |
263 | } | |
264 | } | |
265 | ||
4103818d CC |
266 | static void apply_arg_if_exists(struct trailer_item *in_tok, |
267 | struct trailer_item *arg_tok, | |
268 | struct trailer_item *on_tok, | |
269 | struct trailer_item **in_tok_first, | |
270 | struct trailer_item **in_tok_last) | |
271 | { | |
272 | switch (arg_tok->conf.if_exists) { | |
273 | case EXISTS_DO_NOTHING: | |
274 | free_trailer_item(arg_tok); | |
275 | break; | |
276 | case EXISTS_REPLACE: | |
85039fb6 | 277 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
278 | add_arg_to_input_list(on_tok, arg_tok, |
279 | in_tok_first, in_tok_last); | |
280 | remove_from_list(in_tok, in_tok_first, in_tok_last); | |
281 | free_trailer_item(in_tok); | |
282 | break; | |
283 | case EXISTS_ADD: | |
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 | break; | |
288 | case EXISTS_ADD_IF_DIFFERENT: | |
85039fb6 | 289 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
290 | if (check_if_different(in_tok, arg_tok, 1)) |
291 | add_arg_to_input_list(on_tok, arg_tok, | |
292 | in_tok_first, in_tok_last); | |
293 | else | |
294 | free_trailer_item(arg_tok); | |
295 | break; | |
296 | case EXISTS_ADD_IF_DIFFERENT_NEIGHBOR: | |
85039fb6 | 297 | apply_item_command(in_tok, arg_tok); |
4103818d CC |
298 | if (check_if_different(on_tok, arg_tok, 0)) |
299 | add_arg_to_input_list(on_tok, arg_tok, | |
300 | in_tok_first, in_tok_last); | |
301 | else | |
302 | free_trailer_item(arg_tok); | |
303 | break; | |
304 | } | |
305 | } | |
306 | ||
307 | static void apply_arg_if_missing(struct trailer_item **in_tok_first, | |
308 | struct trailer_item **in_tok_last, | |
309 | struct trailer_item *arg_tok) | |
310 | { | |
311 | struct trailer_item **in_tok; | |
312 | enum action_where where; | |
313 | ||
314 | switch (arg_tok->conf.if_missing) { | |
315 | case MISSING_DO_NOTHING: | |
316 | free_trailer_item(arg_tok); | |
317 | break; | |
318 | case MISSING_ADD: | |
319 | where = arg_tok->conf.where; | |
320 | in_tok = after_or_end(where) ? in_tok_last : in_tok_first; | |
85039fb6 | 321 | apply_item_command(NULL, arg_tok); |
4103818d CC |
322 | if (*in_tok) { |
323 | add_arg_to_input_list(*in_tok, arg_tok, | |
324 | in_tok_first, in_tok_last); | |
325 | } else { | |
326 | *in_tok_first = arg_tok; | |
327 | *in_tok_last = arg_tok; | |
328 | } | |
329 | break; | |
330 | } | |
331 | } | |
332 | ||
333 | static int find_same_and_apply_arg(struct trailer_item **in_tok_first, | |
334 | struct trailer_item **in_tok_last, | |
335 | struct trailer_item *arg_tok) | |
336 | { | |
337 | struct trailer_item *in_tok; | |
338 | struct trailer_item *on_tok; | |
339 | struct trailer_item *following_tok; | |
340 | ||
341 | enum action_where where = arg_tok->conf.where; | |
342 | int middle = (where == WHERE_AFTER) || (where == WHERE_BEFORE); | |
343 | int backwards = after_or_end(where); | |
344 | struct trailer_item *start_tok = backwards ? *in_tok_last : *in_tok_first; | |
345 | ||
346 | for (in_tok = start_tok; in_tok; in_tok = following_tok) { | |
347 | following_tok = backwards ? in_tok->previous : in_tok->next; | |
348 | if (!same_token(in_tok, arg_tok)) | |
349 | continue; | |
350 | on_tok = middle ? in_tok : start_tok; | |
351 | apply_arg_if_exists(in_tok, arg_tok, on_tok, | |
352 | in_tok_first, in_tok_last); | |
353 | return 1; | |
354 | } | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static void process_trailers_lists(struct trailer_item **in_tok_first, | |
359 | struct trailer_item **in_tok_last, | |
360 | struct trailer_item **arg_tok_first) | |
361 | { | |
362 | struct trailer_item *arg_tok; | |
363 | struct trailer_item *next_arg; | |
364 | ||
365 | if (!*arg_tok_first) | |
366 | return; | |
367 | ||
368 | for (arg_tok = *arg_tok_first; arg_tok; arg_tok = next_arg) { | |
369 | int applied = 0; | |
370 | ||
371 | next_arg = arg_tok->next; | |
372 | remove_from_list(arg_tok, arg_tok_first, NULL); | |
373 | ||
374 | applied = find_same_and_apply_arg(in_tok_first, | |
375 | in_tok_last, | |
376 | arg_tok); | |
377 | ||
378 | if (!applied) | |
379 | apply_arg_if_missing(in_tok_first, | |
380 | in_tok_last, | |
381 | arg_tok); | |
382 | } | |
383 | } | |
46a0613f CC |
384 | |
385 | static int set_where(struct conf_info *item, const char *value) | |
386 | { | |
387 | if (!strcasecmp("after", value)) | |
388 | item->where = WHERE_AFTER; | |
389 | else if (!strcasecmp("before", value)) | |
390 | item->where = WHERE_BEFORE; | |
391 | else if (!strcasecmp("end", value)) | |
392 | item->where = WHERE_END; | |
393 | else if (!strcasecmp("start", value)) | |
394 | item->where = WHERE_START; | |
395 | else | |
396 | return -1; | |
397 | return 0; | |
398 | } | |
399 | ||
400 | static int set_if_exists(struct conf_info *item, const char *value) | |
401 | { | |
402 | if (!strcasecmp("addIfDifferent", value)) | |
403 | item->if_exists = EXISTS_ADD_IF_DIFFERENT; | |
404 | else if (!strcasecmp("addIfDifferentNeighbor", value)) | |
405 | item->if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR; | |
406 | else if (!strcasecmp("add", value)) | |
407 | item->if_exists = EXISTS_ADD; | |
408 | else if (!strcasecmp("replace", value)) | |
409 | item->if_exists = EXISTS_REPLACE; | |
410 | else if (!strcasecmp("doNothing", value)) | |
411 | item->if_exists = EXISTS_DO_NOTHING; | |
412 | else | |
413 | return -1; | |
414 | return 0; | |
415 | } | |
416 | ||
417 | static int set_if_missing(struct conf_info *item, const char *value) | |
418 | { | |
419 | if (!strcasecmp("doNothing", value)) | |
420 | item->if_missing = MISSING_DO_NOTHING; | |
421 | else if (!strcasecmp("add", value)) | |
422 | item->if_missing = MISSING_ADD; | |
423 | else | |
424 | return -1; | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static void duplicate_conf(struct conf_info *dst, struct conf_info *src) | |
429 | { | |
430 | *dst = *src; | |
431 | if (src->name) | |
432 | dst->name = xstrdup(src->name); | |
433 | if (src->key) | |
434 | dst->key = xstrdup(src->key); | |
435 | if (src->command) | |
436 | dst->command = xstrdup(src->command); | |
437 | } | |
438 | ||
439 | static struct trailer_item *get_conf_item(const char *name) | |
440 | { | |
441 | struct trailer_item *item; | |
442 | struct trailer_item *previous; | |
443 | ||
444 | /* Look up item with same name */ | |
445 | for (previous = NULL, item = first_conf_item; | |
446 | item; | |
447 | previous = item, item = item->next) { | |
448 | if (!strcasecmp(item->conf.name, name)) | |
449 | return item; | |
450 | } | |
451 | ||
452 | /* Item does not already exists, create it */ | |
453 | item = xcalloc(sizeof(struct trailer_item), 1); | |
454 | duplicate_conf(&item->conf, &default_conf_info); | |
455 | item->conf.name = xstrdup(name); | |
456 | ||
457 | if (!previous) | |
458 | first_conf_item = item; | |
459 | else { | |
460 | previous->next = item; | |
461 | item->previous = previous; | |
462 | } | |
463 | ||
464 | return item; | |
465 | } | |
466 | ||
467 | enum trailer_info_type { TRAILER_KEY, TRAILER_COMMAND, TRAILER_WHERE, | |
468 | TRAILER_IF_EXISTS, TRAILER_IF_MISSING }; | |
469 | ||
470 | static struct { | |
471 | const char *name; | |
472 | enum trailer_info_type type; | |
473 | } trailer_config_items[] = { | |
474 | { "key", TRAILER_KEY }, | |
475 | { "command", TRAILER_COMMAND }, | |
476 | { "where", TRAILER_WHERE }, | |
477 | { "ifexists", TRAILER_IF_EXISTS }, | |
478 | { "ifmissing", TRAILER_IF_MISSING } | |
479 | }; | |
480 | ||
481 | static int git_trailer_default_config(const char *conf_key, const char *value, void *cb) | |
482 | { | |
483 | const char *trailer_item, *variable_name; | |
484 | ||
485 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
486 | return 0; | |
487 | ||
488 | variable_name = strrchr(trailer_item, '.'); | |
489 | if (!variable_name) { | |
490 | if (!strcmp(trailer_item, "where")) { | |
491 | if (set_where(&default_conf_info, value) < 0) | |
492 | warning(_("unknown value '%s' for key '%s'"), | |
493 | value, conf_key); | |
494 | } else if (!strcmp(trailer_item, "ifexists")) { | |
495 | if (set_if_exists(&default_conf_info, value) < 0) | |
496 | warning(_("unknown value '%s' for key '%s'"), | |
497 | value, conf_key); | |
498 | } else if (!strcmp(trailer_item, "ifmissing")) { | |
499 | if (set_if_missing(&default_conf_info, value) < 0) | |
500 | warning(_("unknown value '%s' for key '%s'"), | |
501 | value, conf_key); | |
502 | } else if (!strcmp(trailer_item, "separators")) { | |
503 | separators = xstrdup(value); | |
504 | } | |
505 | } | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static int git_trailer_config(const char *conf_key, const char *value, void *cb) | |
510 | { | |
511 | const char *trailer_item, *variable_name; | |
512 | struct trailer_item *item; | |
513 | struct conf_info *conf; | |
514 | char *name = NULL; | |
515 | enum trailer_info_type type; | |
516 | int i; | |
517 | ||
518 | if (!skip_prefix(conf_key, "trailer.", &trailer_item)) | |
519 | return 0; | |
520 | ||
521 | variable_name = strrchr(trailer_item, '.'); | |
522 | if (!variable_name) | |
523 | return 0; | |
524 | ||
525 | variable_name++; | |
526 | for (i = 0; i < ARRAY_SIZE(trailer_config_items); i++) { | |
527 | if (strcmp(trailer_config_items[i].name, variable_name)) | |
528 | continue; | |
529 | name = xstrndup(trailer_item, variable_name - trailer_item - 1); | |
530 | type = trailer_config_items[i].type; | |
531 | break; | |
532 | } | |
533 | ||
534 | if (!name) | |
535 | return 0; | |
536 | ||
537 | item = get_conf_item(name); | |
538 | conf = &item->conf; | |
539 | free(name); | |
540 | ||
541 | switch (type) { | |
542 | case TRAILER_KEY: | |
543 | if (conf->key) | |
544 | warning(_("more than one %s"), conf_key); | |
545 | conf->key = xstrdup(value); | |
546 | break; | |
547 | case TRAILER_COMMAND: | |
548 | if (conf->command) | |
549 | warning(_("more than one %s"), conf_key); | |
550 | conf->command = xstrdup(value); | |
551 | break; | |
552 | case TRAILER_WHERE: | |
553 | if (set_where(conf, value)) | |
554 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
555 | break; | |
556 | case TRAILER_IF_EXISTS: | |
557 | if (set_if_exists(conf, value)) | |
558 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
559 | break; | |
560 | case TRAILER_IF_MISSING: | |
561 | if (set_if_missing(conf, value)) | |
562 | warning(_("unknown value '%s' for key '%s'"), value, conf_key); | |
563 | break; | |
564 | default: | |
565 | die("internal bug in trailer.c"); | |
566 | } | |
567 | return 0; | |
568 | } | |
f0a90b4e CC |
569 | |
570 | static int parse_trailer(struct strbuf *tok, struct strbuf *val, const char *trailer) | |
571 | { | |
572 | size_t len; | |
573 | struct strbuf seps = STRBUF_INIT; | |
574 | strbuf_addstr(&seps, separators); | |
575 | strbuf_addch(&seps, '='); | |
576 | len = strcspn(trailer, seps.buf); | |
577 | strbuf_release(&seps); | |
d52adf1f CC |
578 | if (len == 0) { |
579 | int l = strlen(trailer); | |
580 | while (l > 0 && isspace(trailer[l - 1])) | |
581 | l--; | |
582 | return error(_("empty trailer token in trailer '%.*s'"), l, trailer); | |
583 | } | |
f0a90b4e CC |
584 | if (len < strlen(trailer)) { |
585 | strbuf_add(tok, trailer, len); | |
586 | strbuf_trim(tok); | |
587 | strbuf_addstr(val, trailer + len + 1); | |
588 | strbuf_trim(val); | |
589 | } else { | |
590 | strbuf_addstr(tok, trailer); | |
591 | strbuf_trim(tok); | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static const char *token_from_item(struct trailer_item *item, char *tok) | |
597 | { | |
598 | if (item->conf.key) | |
599 | return item->conf.key; | |
600 | if (tok) | |
601 | return tok; | |
602 | return item->conf.name; | |
603 | } | |
604 | ||
605 | static struct trailer_item *new_trailer_item(struct trailer_item *conf_item, | |
606 | char *tok, char *val) | |
607 | { | |
608 | struct trailer_item *new = xcalloc(sizeof(*new), 1); | |
85039fb6 | 609 | new->value = val ? val : xstrdup(""); |
f0a90b4e CC |
610 | |
611 | if (conf_item) { | |
612 | duplicate_conf(&new->conf, &conf_item->conf); | |
613 | new->token = xstrdup(token_from_item(conf_item, tok)); | |
614 | free(tok); | |
615 | } else { | |
616 | duplicate_conf(&new->conf, &default_conf_info); | |
617 | new->token = tok; | |
618 | } | |
619 | ||
620 | return new; | |
621 | } | |
622 | ||
623 | static int token_matches_item(const char *tok, struct trailer_item *item, int tok_len) | |
624 | { | |
625 | if (!strncasecmp(tok, item->conf.name, tok_len)) | |
626 | return 1; | |
627 | return item->conf.key ? !strncasecmp(tok, item->conf.key, tok_len) : 0; | |
628 | } | |
629 | ||
630 | static struct trailer_item *create_trailer_item(const char *string) | |
631 | { | |
632 | struct strbuf tok = STRBUF_INIT; | |
633 | struct strbuf val = STRBUF_INIT; | |
634 | struct trailer_item *item; | |
635 | int tok_len; | |
636 | ||
637 | if (parse_trailer(&tok, &val, string)) | |
638 | return NULL; | |
639 | ||
640 | tok_len = token_len_without_separator(tok.buf, tok.len); | |
641 | ||
642 | /* Lookup if the token matches something in the config */ | |
643 | for (item = first_conf_item; item; item = item->next) { | |
644 | if (token_matches_item(tok.buf, item, tok_len)) | |
645 | return new_trailer_item(item, | |
646 | strbuf_detach(&tok, NULL), | |
647 | strbuf_detach(&val, NULL)); | |
648 | } | |
649 | ||
650 | return new_trailer_item(NULL, | |
651 | strbuf_detach(&tok, NULL), | |
652 | strbuf_detach(&val, NULL)); | |
653 | } | |
654 | ||
655 | static void add_trailer_item(struct trailer_item **first, | |
656 | struct trailer_item **last, | |
657 | struct trailer_item *new) | |
658 | { | |
659 | if (!new) | |
660 | return; | |
661 | if (!*last) { | |
662 | *first = new; | |
663 | *last = new; | |
664 | } else { | |
665 | (*last)->next = new; | |
666 | new->previous = *last; | |
667 | *last = new; | |
668 | } | |
669 | } | |
670 | ||
671 | static struct trailer_item *process_command_line_args(struct string_list *trailers) | |
672 | { | |
673 | struct trailer_item *arg_tok_first = NULL; | |
674 | struct trailer_item *arg_tok_last = NULL; | |
675 | struct string_list_item *tr; | |
85039fb6 CC |
676 | struct trailer_item *item; |
677 | ||
678 | /* Add a trailer item for each configured trailer with a command */ | |
679 | for (item = first_conf_item; item; item = item->next) { | |
680 | if (item->conf.command) { | |
681 | struct trailer_item *new = new_trailer_item(item, NULL, NULL); | |
682 | add_trailer_item(&arg_tok_first, &arg_tok_last, new); | |
683 | } | |
684 | } | |
f0a90b4e | 685 | |
85039fb6 | 686 | /* Add a trailer item for each trailer on the command line */ |
f0a90b4e CC |
687 | for_each_string_list_item(tr, trailers) { |
688 | struct trailer_item *new = create_trailer_item(tr->string); | |
689 | add_trailer_item(&arg_tok_first, &arg_tok_last, new); | |
690 | } | |
691 | ||
692 | return arg_tok_first; | |
693 | } | |
2013d850 CC |
694 | |
695 | static struct strbuf **read_input_file(const char *file) | |
696 | { | |
697 | struct strbuf **lines; | |
698 | struct strbuf sb = STRBUF_INIT; | |
699 | ||
700 | if (file) { | |
701 | if (strbuf_read_file(&sb, file, 0) < 0) | |
702 | die_errno(_("could not read input file '%s'"), file); | |
703 | } else { | |
704 | if (strbuf_read(&sb, fileno(stdin), 0) < 0) | |
705 | die_errno(_("could not read from stdin")); | |
706 | } | |
707 | ||
708 | lines = strbuf_split(&sb, '\n'); | |
709 | ||
710 | strbuf_release(&sb); | |
711 | ||
712 | return lines; | |
713 | } | |
714 | ||
715 | /* | |
716 | * Return the (0 based) index of the start of the patch or the line | |
717 | * count if there is no patch in the message. | |
718 | */ | |
719 | static int find_patch_start(struct strbuf **lines, int count) | |
720 | { | |
721 | int i; | |
722 | ||
723 | /* Get the start of the patch part if any */ | |
724 | for (i = 0; i < count; i++) { | |
725 | if (starts_with(lines[i]->buf, "---")) | |
726 | return i; | |
727 | } | |
728 | ||
729 | return count; | |
730 | } | |
731 | ||
732 | /* | |
733 | * Return the (0 based) index of the first trailer line or count if | |
734 | * there are no trailers. Trailers are searched only in the lines from | |
735 | * index (count - 1) down to index 0. | |
736 | */ | |
737 | static int find_trailer_start(struct strbuf **lines, int count) | |
738 | { | |
5c99995d CC |
739 | int start, end_of_title, only_spaces = 1; |
740 | ||
741 | /* The first paragraph is the title and cannot be trailers */ | |
742 | for (start = 0; start < count; start++) { | |
743 | if (lines[start]->buf[0] == comment_line_char) | |
744 | continue; | |
745 | if (contains_only_spaces(lines[start]->buf)) | |
746 | break; | |
747 | } | |
748 | end_of_title = start; | |
2013d850 CC |
749 | |
750 | /* | |
751 | * Get the start of the trailers by looking starting from the end | |
752 | * for a line with only spaces before lines with one separator. | |
753 | */ | |
5c99995d | 754 | for (start = count - 1; start >= end_of_title; start--) { |
2013d850 CC |
755 | if (lines[start]->buf[0] == comment_line_char) |
756 | continue; | |
757 | if (contains_only_spaces(lines[start]->buf)) { | |
758 | if (only_spaces) | |
759 | continue; | |
760 | return start + 1; | |
761 | } | |
762 | if (strcspn(lines[start]->buf, separators) < lines[start]->len) { | |
763 | if (only_spaces) | |
764 | only_spaces = 0; | |
765 | continue; | |
766 | } | |
767 | return count; | |
768 | } | |
769 | ||
770 | return only_spaces ? count : 0; | |
771 | } | |
772 | ||
61cfef4c CC |
773 | /* Get the index of the end of the trailers */ |
774 | static int find_trailer_end(struct strbuf **lines, int patch_start) | |
775 | { | |
776 | struct strbuf sb = STRBUF_INIT; | |
777 | int i, ignore_bytes; | |
778 | ||
779 | for (i = 0; i < patch_start; i++) | |
780 | strbuf_addbuf(&sb, lines[i]); | |
781 | ignore_bytes = ignore_non_trailer(&sb); | |
782 | strbuf_release(&sb); | |
783 | for (i = patch_start - 1; i >= 0 && ignore_bytes > 0; i--) | |
784 | ignore_bytes -= lines[i]->len; | |
785 | ||
786 | return i + 1; | |
787 | } | |
788 | ||
2013d850 CC |
789 | static int has_blank_line_before(struct strbuf **lines, int start) |
790 | { | |
791 | for (;start >= 0; start--) { | |
792 | if (lines[start]->buf[0] == comment_line_char) | |
793 | continue; | |
794 | return contains_only_spaces(lines[start]->buf); | |
795 | } | |
796 | return 0; | |
797 | } | |
798 | ||
d0d2344a | 799 | static void print_lines(FILE *outfile, struct strbuf **lines, int start, int end) |
2013d850 CC |
800 | { |
801 | int i; | |
802 | for (i = start; lines[i] && i < end; i++) | |
d0d2344a | 803 | fprintf(outfile, "%s", lines[i]->buf); |
2013d850 CC |
804 | } |
805 | ||
d0d2344a TK |
806 | static int process_input_file(FILE *outfile, |
807 | struct strbuf **lines, | |
2013d850 CC |
808 | struct trailer_item **in_tok_first, |
809 | struct trailer_item **in_tok_last) | |
810 | { | |
811 | int count = 0; | |
61cfef4c | 812 | int patch_start, trailer_start, trailer_end, i; |
2013d850 CC |
813 | |
814 | /* Get the line count */ | |
815 | while (lines[count]) | |
816 | count++; | |
817 | ||
818 | patch_start = find_patch_start(lines, count); | |
61cfef4c CC |
819 | trailer_end = find_trailer_end(lines, patch_start); |
820 | trailer_start = find_trailer_start(lines, trailer_end); | |
2013d850 CC |
821 | |
822 | /* Print lines before the trailers as is */ | |
d0d2344a | 823 | print_lines(outfile, lines, 0, trailer_start); |
2013d850 CC |
824 | |
825 | if (!has_blank_line_before(lines, trailer_start - 1)) | |
d0d2344a | 826 | fprintf(outfile, "\n"); |
2013d850 CC |
827 | |
828 | /* Parse trailer lines */ | |
61cfef4c | 829 | for (i = trailer_start; i < trailer_end; i++) { |
2887103b CC |
830 | if (lines[i]->buf[0] != comment_line_char) { |
831 | struct trailer_item *new = create_trailer_item(lines[i]->buf); | |
832 | add_trailer_item(in_tok_first, in_tok_last, new); | |
833 | } | |
2013d850 CC |
834 | } |
835 | ||
61cfef4c | 836 | return trailer_end; |
2013d850 | 837 | } |
b1d78d77 CC |
838 | |
839 | static void free_all(struct trailer_item **first) | |
840 | { | |
841 | while (*first) { | |
842 | struct trailer_item *item = remove_first(first); | |
843 | free_trailer_item(item); | |
844 | } | |
845 | } | |
846 | ||
e1f89863 TK |
847 | static struct tempfile trailers_tempfile; |
848 | ||
849 | static FILE *create_in_place_tempfile(const char *file) | |
850 | { | |
851 | struct stat st; | |
852 | struct strbuf template = STRBUF_INIT; | |
853 | const char *tail; | |
854 | FILE *outfile; | |
855 | ||
856 | if (stat(file, &st)) | |
857 | die_errno(_("could not stat %s"), file); | |
858 | if (!S_ISREG(st.st_mode)) | |
859 | die(_("file %s is not a regular file"), file); | |
860 | if (!(st.st_mode & S_IWUSR)) | |
861 | die(_("file %s is not writable by user"), file); | |
862 | ||
863 | /* Create temporary file in the same directory as the original */ | |
864 | tail = strrchr(file, '/'); | |
865 | if (tail != NULL) | |
866 | strbuf_add(&template, file, tail - file + 1); | |
867 | strbuf_addstr(&template, "git-interpret-trailers-XXXXXX"); | |
868 | ||
869 | xmks_tempfile_m(&trailers_tempfile, template.buf, st.st_mode); | |
870 | strbuf_release(&template); | |
871 | outfile = fdopen_tempfile(&trailers_tempfile, "w"); | |
872 | if (!outfile) | |
873 | die_errno(_("could not open temporary file")); | |
874 | ||
875 | return outfile; | |
876 | } | |
877 | ||
878 | void process_trailers(const char *file, int in_place, int trim_empty, struct string_list *trailers) | |
b1d78d77 CC |
879 | { |
880 | struct trailer_item *in_tok_first = NULL; | |
881 | struct trailer_item *in_tok_last = NULL; | |
882 | struct trailer_item *arg_tok_first; | |
883 | struct strbuf **lines; | |
61cfef4c | 884 | int trailer_end; |
d0d2344a | 885 | FILE *outfile = stdout; |
b1d78d77 CC |
886 | |
887 | /* Default config must be setup first */ | |
888 | git_config(git_trailer_default_config, NULL); | |
889 | git_config(git_trailer_config, NULL); | |
890 | ||
891 | lines = read_input_file(file); | |
892 | ||
e1f89863 TK |
893 | if (in_place) |
894 | outfile = create_in_place_tempfile(file); | |
895 | ||
b1d78d77 | 896 | /* Print the lines before the trailers */ |
d0d2344a | 897 | trailer_end = process_input_file(outfile, lines, &in_tok_first, &in_tok_last); |
b1d78d77 CC |
898 | |
899 | arg_tok_first = process_command_line_args(trailers); | |
900 | ||
901 | process_trailers_lists(&in_tok_first, &in_tok_last, &arg_tok_first); | |
902 | ||
d0d2344a | 903 | print_all(outfile, in_tok_first, trim_empty); |
b1d78d77 CC |
904 | |
905 | free_all(&in_tok_first); | |
906 | ||
907 | /* Print the lines after the trailers as is */ | |
d0d2344a | 908 | print_lines(outfile, lines, trailer_end, INT_MAX); |
b1d78d77 | 909 | |
e1f89863 TK |
910 | if (in_place) |
911 | if (rename_tempfile(&trailers_tempfile, file)) | |
912 | die_errno(_("could not rename temporary file to %s"), file); | |
913 | ||
b1d78d77 CC |
914 | strbuf_list_free(lines); |
915 | } |