Sync with 2.4.3
[git.git] / trailer.c
blob4b14a567b418acd3181fcf6e37f246c91d60eb60
1 #include "cache.h"
2 #include "string-list.h"
3 #include "run-command.h"
4 #include "commit.h"
5 #include "trailer.h"
6 /*
7 * Copyright (c) 2013, 2014 Christian Couder <chriscool@tuxfamily.org>
8 */
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 };
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;
24 static struct conf_info default_conf_info;
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;
34 static struct trailer_item *first_conf_item;
36 static char *separators = ":";
38 #define TRAILER_ARG_STRING "$ARG"
40 static int after_or_end(enum action_where where)
42 return (where == WHERE_AFTER) || (where == WHERE_END);
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.
51 static size_t token_len_without_separator(const char *token, size_t len)
53 while (len > 0 && !isalnum(token[len - 1]))
54 len--;
55 return len;
58 static int same_token(struct trailer_item *a, struct trailer_item *b)
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;
64 return !strncasecmp(a->token, b->token, min_len);
67 static int same_value(struct trailer_item *a, struct trailer_item *b)
69 return !strcasecmp(a->value, b->value);
72 static int same_trailer(struct trailer_item *a, struct trailer_item *b)
74 return same_token(a, b) && same_value(a, b);
77 static inline int contains_only_spaces(const char *str)
79 const char *s = str;
80 while (*s && isspace(*s))
81 s++;
82 return !*s;
85 static inline void strbuf_replace(struct strbuf *sb, const char *a, const char *b)
87 const char *ptr = strstr(sb->buf, a);
88 if (ptr)
89 strbuf_splice(sb, ptr - sb->buf, strlen(a), b, strlen(b));
92 static void free_trailer_item(struct trailer_item *item)
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);
102 static char last_non_space_char(const char *s)
104 int i;
105 for (i = strlen(s) - 1; i >= 0; i--)
106 if (!isspace(s[i]))
107 return s[i];
108 return '\0';
111 static void print_tok_val(const char *tok, const char *val)
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);
122 static void print_all(struct trailer_item *first, int trim_empty)
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);
131 static void update_last(struct trailer_item **last)
133 if (*last)
134 while ((*last)->next != NULL)
135 *last = (*last)->next;
138 static void update_first(struct trailer_item **first)
140 if (*first)
141 while ((*first)->previous != NULL)
142 *first = (*first)->previous;
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)
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);
167 static int check_if_different(struct trailer_item *in_tok,
168 struct trailer_item *arg_tok,
169 int check_all)
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;
178 * if we want to add a trailer after another one,
179 * we have to check those before this one
181 in_tok = after_or_end(where) ? in_tok->previous : in_tok->next;
182 } while (check_all);
183 return 1;
186 static void remove_from_list(struct trailer_item *item,
187 struct trailer_item **first,
188 struct trailer_item **last)
190 struct trailer_item *next = item->next;
191 struct trailer_item *previous = item->previous;
193 if (next) {
194 item->next->previous = previous;
195 item->next = NULL;
196 } else if (last)
197 *last = previous;
199 if (previous) {
200 item->previous->next = next;
201 item->previous = NULL;
202 } else if (first)
203 *first = next;
206 static struct trailer_item *remove_first(struct trailer_item **first)
208 struct trailer_item *item = *first;
209 *first = item->next;
210 if (item->next) {
211 item->next->previous = NULL;
212 item->next = NULL;
214 return item;
217 static const char *apply_command(const char *command, const char *arg)
219 struct strbuf cmd = STRBUF_INIT;
220 struct strbuf buf = STRBUF_INIT;
221 struct child_process cp = CHILD_PROCESS_INIT;
222 const char *argv[] = {NULL, NULL};
223 const char *result;
225 strbuf_addstr(&cmd, command);
226 if (arg)
227 strbuf_replace(&cmd, TRAILER_ARG_STRING, arg);
229 argv[0] = cmd.buf;
230 cp.argv = argv;
231 cp.env = local_repo_env;
232 cp.no_stdin = 1;
233 cp.use_shell = 1;
235 if (capture_command(&cp, &buf, 1024)) {
236 error("running trailer command '%s' failed", cmd.buf);
237 strbuf_release(&buf);
238 result = xstrdup("");
239 } else {
240 strbuf_trim(&buf);
241 result = strbuf_detach(&buf, NULL);
244 strbuf_release(&cmd);
245 return result;
248 static void apply_item_command(struct trailer_item *in_tok, struct trailer_item *arg_tok)
250 if (arg_tok->conf.command) {
251 const char *arg;
252 if (arg_tok->value && arg_tok->value[0]) {
253 arg = arg_tok->value;
254 } else {
255 if (in_tok && in_tok->value)
256 arg = xstrdup(in_tok->value);
257 else
258 arg = xstrdup("");
260 arg_tok->value = apply_command(arg_tok->conf.command, arg);
261 free((char *)arg);
265 static void apply_arg_if_exists(struct trailer_item *in_tok,
266 struct trailer_item *arg_tok,
267 struct trailer_item *on_tok,
268 struct trailer_item **in_tok_first,
269 struct trailer_item **in_tok_last)
271 switch (arg_tok->conf.if_exists) {
272 case EXISTS_DO_NOTHING:
273 free_trailer_item(arg_tok);
274 break;
275 case EXISTS_REPLACE:
276 apply_item_command(in_tok, arg_tok);
277 add_arg_to_input_list(on_tok, arg_tok,
278 in_tok_first, in_tok_last);
279 remove_from_list(in_tok, in_tok_first, in_tok_last);
280 free_trailer_item(in_tok);
281 break;
282 case EXISTS_ADD:
283 apply_item_command(in_tok, arg_tok);
284 add_arg_to_input_list(on_tok, arg_tok,
285 in_tok_first, in_tok_last);
286 break;
287 case EXISTS_ADD_IF_DIFFERENT:
288 apply_item_command(in_tok, arg_tok);
289 if (check_if_different(in_tok, arg_tok, 1))
290 add_arg_to_input_list(on_tok, arg_tok,
291 in_tok_first, in_tok_last);
292 else
293 free_trailer_item(arg_tok);
294 break;
295 case EXISTS_ADD_IF_DIFFERENT_NEIGHBOR:
296 apply_item_command(in_tok, arg_tok);
297 if (check_if_different(on_tok, arg_tok, 0))
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;
306 static void apply_arg_if_missing(struct trailer_item **in_tok_first,
307 struct trailer_item **in_tok_last,
308 struct trailer_item *arg_tok)
310 struct trailer_item **in_tok;
311 enum action_where where;
313 switch (arg_tok->conf.if_missing) {
314 case MISSING_DO_NOTHING:
315 free_trailer_item(arg_tok);
316 break;
317 case MISSING_ADD:
318 where = arg_tok->conf.where;
319 in_tok = after_or_end(where) ? in_tok_last : in_tok_first;
320 apply_item_command(NULL, arg_tok);
321 if (*in_tok) {
322 add_arg_to_input_list(*in_tok, arg_tok,
323 in_tok_first, in_tok_last);
324 } else {
325 *in_tok_first = arg_tok;
326 *in_tok_last = arg_tok;
328 break;
332 static int find_same_and_apply_arg(struct trailer_item **in_tok_first,
333 struct trailer_item **in_tok_last,
334 struct trailer_item *arg_tok)
336 struct trailer_item *in_tok;
337 struct trailer_item *on_tok;
338 struct trailer_item *following_tok;
340 enum action_where where = arg_tok->conf.where;
341 int middle = (where == WHERE_AFTER) || (where == WHERE_BEFORE);
342 int backwards = after_or_end(where);
343 struct trailer_item *start_tok = backwards ? *in_tok_last : *in_tok_first;
345 for (in_tok = start_tok; in_tok; in_tok = following_tok) {
346 following_tok = backwards ? in_tok->previous : in_tok->next;
347 if (!same_token(in_tok, arg_tok))
348 continue;
349 on_tok = middle ? in_tok : start_tok;
350 apply_arg_if_exists(in_tok, arg_tok, on_tok,
351 in_tok_first, in_tok_last);
352 return 1;
354 return 0;
357 static void process_trailers_lists(struct trailer_item **in_tok_first,
358 struct trailer_item **in_tok_last,
359 struct trailer_item **arg_tok_first)
361 struct trailer_item *arg_tok;
362 struct trailer_item *next_arg;
364 if (!*arg_tok_first)
365 return;
367 for (arg_tok = *arg_tok_first; arg_tok; arg_tok = next_arg) {
368 int applied = 0;
370 next_arg = arg_tok->next;
371 remove_from_list(arg_tok, arg_tok_first, NULL);
373 applied = find_same_and_apply_arg(in_tok_first,
374 in_tok_last,
375 arg_tok);
377 if (!applied)
378 apply_arg_if_missing(in_tok_first,
379 in_tok_last,
380 arg_tok);
384 static int set_where(struct conf_info *item, const char *value)
386 if (!strcasecmp("after", value))
387 item->where = WHERE_AFTER;
388 else if (!strcasecmp("before", value))
389 item->where = WHERE_BEFORE;
390 else if (!strcasecmp("end", value))
391 item->where = WHERE_END;
392 else if (!strcasecmp("start", value))
393 item->where = WHERE_START;
394 else
395 return -1;
396 return 0;
399 static int set_if_exists(struct conf_info *item, const char *value)
401 if (!strcasecmp("addIfDifferent", value))
402 item->if_exists = EXISTS_ADD_IF_DIFFERENT;
403 else if (!strcasecmp("addIfDifferentNeighbor", value))
404 item->if_exists = EXISTS_ADD_IF_DIFFERENT_NEIGHBOR;
405 else if (!strcasecmp("add", value))
406 item->if_exists = EXISTS_ADD;
407 else if (!strcasecmp("replace", value))
408 item->if_exists = EXISTS_REPLACE;
409 else if (!strcasecmp("doNothing", value))
410 item->if_exists = EXISTS_DO_NOTHING;
411 else
412 return -1;
413 return 0;
416 static int set_if_missing(struct conf_info *item, const char *value)
418 if (!strcasecmp("doNothing", value))
419 item->if_missing = MISSING_DO_NOTHING;
420 else if (!strcasecmp("add", value))
421 item->if_missing = MISSING_ADD;
422 else
423 return -1;
424 return 0;
427 static void duplicate_conf(struct conf_info *dst, struct conf_info *src)
429 *dst = *src;
430 if (src->name)
431 dst->name = xstrdup(src->name);
432 if (src->key)
433 dst->key = xstrdup(src->key);
434 if (src->command)
435 dst->command = xstrdup(src->command);
438 static struct trailer_item *get_conf_item(const char *name)
440 struct trailer_item *item;
441 struct trailer_item *previous;
443 /* Look up item with same name */
444 for (previous = NULL, item = first_conf_item;
445 item;
446 previous = item, item = item->next) {
447 if (!strcasecmp(item->conf.name, name))
448 return item;
451 /* Item does not already exists, create it */
452 item = xcalloc(sizeof(struct trailer_item), 1);
453 duplicate_conf(&item->conf, &default_conf_info);
454 item->conf.name = xstrdup(name);
456 if (!previous)
457 first_conf_item = item;
458 else {
459 previous->next = item;
460 item->previous = previous;
463 return item;
466 enum trailer_info_type { TRAILER_KEY, TRAILER_COMMAND, TRAILER_WHERE,
467 TRAILER_IF_EXISTS, TRAILER_IF_MISSING };
469 static struct {
470 const char *name;
471 enum trailer_info_type type;
472 } trailer_config_items[] = {
473 { "key", TRAILER_KEY },
474 { "command", TRAILER_COMMAND },
475 { "where", TRAILER_WHERE },
476 { "ifexists", TRAILER_IF_EXISTS },
477 { "ifmissing", TRAILER_IF_MISSING }
480 static int git_trailer_default_config(const char *conf_key, const char *value, void *cb)
482 const char *trailer_item, *variable_name;
484 if (!skip_prefix(conf_key, "trailer.", &trailer_item))
485 return 0;
487 variable_name = strrchr(trailer_item, '.');
488 if (!variable_name) {
489 if (!strcmp(trailer_item, "where")) {
490 if (set_where(&default_conf_info, value) < 0)
491 warning(_("unknown value '%s' for key '%s'"),
492 value, conf_key);
493 } else if (!strcmp(trailer_item, "ifexists")) {
494 if (set_if_exists(&default_conf_info, value) < 0)
495 warning(_("unknown value '%s' for key '%s'"),
496 value, conf_key);
497 } else if (!strcmp(trailer_item, "ifmissing")) {
498 if (set_if_missing(&default_conf_info, value) < 0)
499 warning(_("unknown value '%s' for key '%s'"),
500 value, conf_key);
501 } else if (!strcmp(trailer_item, "separators")) {
502 separators = xstrdup(value);
505 return 0;
508 static int git_trailer_config(const char *conf_key, const char *value, void *cb)
510 const char *trailer_item, *variable_name;
511 struct trailer_item *item;
512 struct conf_info *conf;
513 char *name = NULL;
514 enum trailer_info_type type;
515 int i;
517 if (!skip_prefix(conf_key, "trailer.", &trailer_item))
518 return 0;
520 variable_name = strrchr(trailer_item, '.');
521 if (!variable_name)
522 return 0;
524 variable_name++;
525 for (i = 0; i < ARRAY_SIZE(trailer_config_items); i++) {
526 if (strcmp(trailer_config_items[i].name, variable_name))
527 continue;
528 name = xstrndup(trailer_item, variable_name - trailer_item - 1);
529 type = trailer_config_items[i].type;
530 break;
533 if (!name)
534 return 0;
536 item = get_conf_item(name);
537 conf = &item->conf;
538 free(name);
540 switch (type) {
541 case TRAILER_KEY:
542 if (conf->key)
543 warning(_("more than one %s"), conf_key);
544 conf->key = xstrdup(value);
545 break;
546 case TRAILER_COMMAND:
547 if (conf->command)
548 warning(_("more than one %s"), conf_key);
549 conf->command = xstrdup(value);
550 break;
551 case TRAILER_WHERE:
552 if (set_where(conf, value))
553 warning(_("unknown value '%s' for key '%s'"), value, conf_key);
554 break;
555 case TRAILER_IF_EXISTS:
556 if (set_if_exists(conf, value))
557 warning(_("unknown value '%s' for key '%s'"), value, conf_key);
558 break;
559 case TRAILER_IF_MISSING:
560 if (set_if_missing(conf, value))
561 warning(_("unknown value '%s' for key '%s'"), value, conf_key);
562 break;
563 default:
564 die("internal bug in trailer.c");
566 return 0;
569 static int parse_trailer(struct strbuf *tok, struct strbuf *val, const char *trailer)
571 size_t len;
572 struct strbuf seps = STRBUF_INIT;
573 strbuf_addstr(&seps, separators);
574 strbuf_addch(&seps, '=');
575 len = strcspn(trailer, seps.buf);
576 strbuf_release(&seps);
577 if (len == 0) {
578 int l = strlen(trailer);
579 while (l > 0 && isspace(trailer[l - 1]))
580 l--;
581 return error(_("empty trailer token in trailer '%.*s'"), l, trailer);
583 if (len < strlen(trailer)) {
584 strbuf_add(tok, trailer, len);
585 strbuf_trim(tok);
586 strbuf_addstr(val, trailer + len + 1);
587 strbuf_trim(val);
588 } else {
589 strbuf_addstr(tok, trailer);
590 strbuf_trim(tok);
592 return 0;
595 static const char *token_from_item(struct trailer_item *item, char *tok)
597 if (item->conf.key)
598 return item->conf.key;
599 if (tok)
600 return tok;
601 return item->conf.name;
604 static struct trailer_item *new_trailer_item(struct trailer_item *conf_item,
605 char *tok, char *val)
607 struct trailer_item *new = xcalloc(sizeof(*new), 1);
608 new->value = val ? val : xstrdup("");
610 if (conf_item) {
611 duplicate_conf(&new->conf, &conf_item->conf);
612 new->token = xstrdup(token_from_item(conf_item, tok));
613 free(tok);
614 } else {
615 duplicate_conf(&new->conf, &default_conf_info);
616 new->token = tok;
619 return new;
622 static int token_matches_item(const char *tok, struct trailer_item *item, int tok_len)
624 if (!strncasecmp(tok, item->conf.name, tok_len))
625 return 1;
626 return item->conf.key ? !strncasecmp(tok, item->conf.key, tok_len) : 0;
629 static struct trailer_item *create_trailer_item(const char *string)
631 struct strbuf tok = STRBUF_INIT;
632 struct strbuf val = STRBUF_INIT;
633 struct trailer_item *item;
634 int tok_len;
636 if (parse_trailer(&tok, &val, string))
637 return NULL;
639 tok_len = token_len_without_separator(tok.buf, tok.len);
641 /* Lookup if the token matches something in the config */
642 for (item = first_conf_item; item; item = item->next) {
643 if (token_matches_item(tok.buf, item, tok_len))
644 return new_trailer_item(item,
645 strbuf_detach(&tok, NULL),
646 strbuf_detach(&val, NULL));
649 return new_trailer_item(NULL,
650 strbuf_detach(&tok, NULL),
651 strbuf_detach(&val, NULL));
654 static void add_trailer_item(struct trailer_item **first,
655 struct trailer_item **last,
656 struct trailer_item *new)
658 if (!new)
659 return;
660 if (!*last) {
661 *first = new;
662 *last = new;
663 } else {
664 (*last)->next = new;
665 new->previous = *last;
666 *last = new;
670 static struct trailer_item *process_command_line_args(struct string_list *trailers)
672 struct trailer_item *arg_tok_first = NULL;
673 struct trailer_item *arg_tok_last = NULL;
674 struct string_list_item *tr;
675 struct trailer_item *item;
677 /* Add a trailer item for each configured trailer with a command */
678 for (item = first_conf_item; item; item = item->next) {
679 if (item->conf.command) {
680 struct trailer_item *new = new_trailer_item(item, NULL, NULL);
681 add_trailer_item(&arg_tok_first, &arg_tok_last, new);
685 /* Add a trailer item for each trailer on the command line */
686 for_each_string_list_item(tr, trailers) {
687 struct trailer_item *new = create_trailer_item(tr->string);
688 add_trailer_item(&arg_tok_first, &arg_tok_last, new);
691 return arg_tok_first;
694 static struct strbuf **read_input_file(const char *file)
696 struct strbuf **lines;
697 struct strbuf sb = STRBUF_INIT;
699 if (file) {
700 if (strbuf_read_file(&sb, file, 0) < 0)
701 die_errno(_("could not read input file '%s'"), file);
702 } else {
703 if (strbuf_read(&sb, fileno(stdin), 0) < 0)
704 die_errno(_("could not read from stdin"));
707 lines = strbuf_split(&sb, '\n');
709 strbuf_release(&sb);
711 return lines;
715 * Return the (0 based) index of the start of the patch or the line
716 * count if there is no patch in the message.
718 static int find_patch_start(struct strbuf **lines, int count)
720 int i;
722 /* Get the start of the patch part if any */
723 for (i = 0; i < count; i++) {
724 if (starts_with(lines[i]->buf, "---"))
725 return i;
728 return count;
732 * Return the (0 based) index of the first trailer line or count if
733 * there are no trailers. Trailers are searched only in the lines from
734 * index (count - 1) down to index 0.
736 static int find_trailer_start(struct strbuf **lines, int count)
738 int start, only_spaces = 1;
741 * Get the start of the trailers by looking starting from the end
742 * for a line with only spaces before lines with one separator.
744 for (start = count - 1; start >= 0; start--) {
745 if (lines[start]->buf[0] == comment_line_char)
746 continue;
747 if (contains_only_spaces(lines[start]->buf)) {
748 if (only_spaces)
749 continue;
750 return start + 1;
752 if (strcspn(lines[start]->buf, separators) < lines[start]->len) {
753 if (only_spaces)
754 only_spaces = 0;
755 continue;
757 return count;
760 return only_spaces ? count : 0;
763 /* Get the index of the end of the trailers */
764 static int find_trailer_end(struct strbuf **lines, int patch_start)
766 struct strbuf sb = STRBUF_INIT;
767 int i, ignore_bytes;
769 for (i = 0; i < patch_start; i++)
770 strbuf_addbuf(&sb, lines[i]);
771 ignore_bytes = ignore_non_trailer(&sb);
772 strbuf_release(&sb);
773 for (i = patch_start - 1; i >= 0 && ignore_bytes > 0; i--)
774 ignore_bytes -= lines[i]->len;
776 return i + 1;
779 static int has_blank_line_before(struct strbuf **lines, int start)
781 for (;start >= 0; start--) {
782 if (lines[start]->buf[0] == comment_line_char)
783 continue;
784 return contains_only_spaces(lines[start]->buf);
786 return 0;
789 static void print_lines(struct strbuf **lines, int start, int end)
791 int i;
792 for (i = start; lines[i] && i < end; i++)
793 printf("%s", lines[i]->buf);
796 static int process_input_file(struct strbuf **lines,
797 struct trailer_item **in_tok_first,
798 struct trailer_item **in_tok_last)
800 int count = 0;
801 int patch_start, trailer_start, trailer_end, i;
803 /* Get the line count */
804 while (lines[count])
805 count++;
807 patch_start = find_patch_start(lines, count);
808 trailer_end = find_trailer_end(lines, patch_start);
809 trailer_start = find_trailer_start(lines, trailer_end);
811 /* Print lines before the trailers as is */
812 print_lines(lines, 0, trailer_start);
814 if (!has_blank_line_before(lines, trailer_start - 1))
815 printf("\n");
817 /* Parse trailer lines */
818 for (i = trailer_start; i < trailer_end; i++) {
819 if (lines[i]->buf[0] != comment_line_char) {
820 struct trailer_item *new = create_trailer_item(lines[i]->buf);
821 add_trailer_item(in_tok_first, in_tok_last, new);
825 return trailer_end;
828 static void free_all(struct trailer_item **first)
830 while (*first) {
831 struct trailer_item *item = remove_first(first);
832 free_trailer_item(item);
836 void process_trailers(const char *file, int trim_empty, struct string_list *trailers)
838 struct trailer_item *in_tok_first = NULL;
839 struct trailer_item *in_tok_last = NULL;
840 struct trailer_item *arg_tok_first;
841 struct strbuf **lines;
842 int trailer_end;
844 /* Default config must be setup first */
845 git_config(git_trailer_default_config, NULL);
846 git_config(git_trailer_config, NULL);
848 lines = read_input_file(file);
850 /* Print the lines before the trailers */
851 trailer_end = process_input_file(lines, &in_tok_first, &in_tok_last);
853 arg_tok_first = process_command_line_args(trailers);
855 process_trailers_lists(&in_tok_first, &in_tok_last, &arg_tok_first);
857 print_all(in_tok_first, trim_empty);
859 free_all(&in_tok_first);
861 /* Print the lines after the trailers as is */
862 print_lines(lines, trailer_end, INT_MAX);
864 strbuf_list_free(lines);