Merge branch 'ak/maint-for-each-ref-no-lookup' into maint
[git/dscho.git] / builtin-mailinfo.c
blob1eeeb4de6d0d54e3fd753b7f057351094e10a24e
1 /*
2 * Another stupid program, this one parsing the headers of an
3 * email to figure out authorship and subject
4 */
5 #include "cache.h"
6 #include "builtin.h"
7 #include "utf8.h"
8 #include "strbuf.h"
10 static FILE *cmitmsg, *patchfile, *fin, *fout;
12 static int keep_subject;
13 static const char *metainfo_charset;
14 static struct strbuf line = STRBUF_INIT;
15 static struct strbuf name = STRBUF_INIT;
16 static struct strbuf email = STRBUF_INIT;
18 static enum {
19 TE_DONTCARE, TE_QP, TE_BASE64,
20 } transfer_encoding;
21 static enum {
22 TYPE_TEXT, TYPE_OTHER,
23 } message_type;
25 static struct strbuf charset = STRBUF_INIT;
26 static int patch_lines;
27 static struct strbuf **p_hdr_data, **s_hdr_data;
29 #define MAX_HDR_PARSED 10
30 #define MAX_BOUNDARIES 5
32 static void cleanup_space(struct strbuf *sb);
35 static void get_sane_name(struct strbuf *out, struct strbuf *name, struct strbuf *email)
37 struct strbuf *src = name;
38 if (name->len < 3 || 60 < name->len || strchr(name->buf, '@') ||
39 strchr(name->buf, '<') || strchr(name->buf, '>'))
40 src = email;
41 else if (name == out)
42 return;
43 strbuf_reset(out);
44 strbuf_addbuf(out, src);
47 static void parse_bogus_from(const struct strbuf *line)
49 /* John Doe <johndoe> */
51 char *bra, *ket;
52 /* This is fallback, so do not bother if we already have an
53 * e-mail address.
55 if (email.len)
56 return;
58 bra = strchr(line->buf, '<');
59 if (!bra)
60 return;
61 ket = strchr(bra, '>');
62 if (!ket)
63 return;
65 strbuf_reset(&email);
66 strbuf_add(&email, bra + 1, ket - bra - 1);
68 strbuf_reset(&name);
69 strbuf_add(&name, line->buf, bra - line->buf);
70 strbuf_trim(&name);
71 get_sane_name(&name, &name, &email);
74 static void handle_from(const struct strbuf *from)
76 char *at;
77 size_t el;
78 struct strbuf f;
80 strbuf_init(&f, from->len);
81 strbuf_addbuf(&f, from);
83 at = strchr(f.buf, '@');
84 if (!at) {
85 parse_bogus_from(from);
86 return;
90 * If we already have one email, don't take any confusing lines
92 if (email.len && strchr(at + 1, '@')) {
93 strbuf_release(&f);
94 return;
97 /* Pick up the string around '@', possibly delimited with <>
98 * pair; that is the email part.
100 while (at > f.buf) {
101 char c = at[-1];
102 if (isspace(c))
103 break;
104 if (c == '<') {
105 at[-1] = ' ';
106 break;
108 at--;
110 el = strcspn(at, " \n\t\r\v\f>");
111 strbuf_reset(&email);
112 strbuf_add(&email, at, el);
113 strbuf_remove(&f, at - f.buf, el + (at[el] ? 1 : 0));
115 /* The remainder is name. It could be
117 * - "John Doe <john.doe@xz>" (a), or
118 * - "john.doe@xz (John Doe)" (b), or
119 * - "John (zzz) Doe <john.doe@xz> (Comment)" (c)
121 * but we have removed the email part, so
123 * - remove extra spaces which could stay after email (case 'c'), and
124 * - trim from both ends, possibly removing the () pair at the end
125 * (cases 'a' and 'b').
127 cleanup_space(&f);
128 strbuf_trim(&f);
129 if (f.buf[0] == '(' && f.len && f.buf[f.len - 1] == ')') {
130 strbuf_remove(&f, 0, 1);
131 strbuf_setlen(&f, f.len - 1);
134 get_sane_name(&name, &f, &email);
135 strbuf_release(&f);
138 static void handle_header(struct strbuf **out, const struct strbuf *line)
140 if (!*out) {
141 *out = xmalloc(sizeof(struct strbuf));
142 strbuf_init(*out, line->len);
143 } else
144 strbuf_reset(*out);
146 strbuf_addbuf(*out, line);
149 /* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt
150 * to have enough heuristics to grok MIME encoded patches often found
151 * on our mailing lists. For example, we do not even treat header lines
152 * case insensitively.
155 static int slurp_attr(const char *line, const char *name, struct strbuf *attr)
157 const char *ends, *ap = strcasestr(line, name);
158 size_t sz;
160 if (!ap) {
161 strbuf_setlen(attr, 0);
162 return 0;
164 ap += strlen(name);
165 if (*ap == '"') {
166 ap++;
167 ends = "\"";
169 else
170 ends = "; \t";
171 sz = strcspn(ap, ends);
172 strbuf_add(attr, ap, sz);
173 return 1;
176 static struct strbuf *content[MAX_BOUNDARIES];
178 static struct strbuf **content_top = content;
180 static void handle_content_type(struct strbuf *line)
182 struct strbuf *boundary = xmalloc(sizeof(struct strbuf));
183 strbuf_init(boundary, line->len);
185 if (!strcasestr(line->buf, "text/"))
186 message_type = TYPE_OTHER;
187 if (slurp_attr(line->buf, "boundary=", boundary)) {
188 strbuf_insert(boundary, 0, "--", 2);
189 if (++content_top > &content[MAX_BOUNDARIES]) {
190 fprintf(stderr, "Too many boundaries to handle\n");
191 exit(1);
193 *content_top = boundary;
194 boundary = NULL;
196 if (slurp_attr(line->buf, "charset=", &charset))
197 strbuf_tolower(&charset);
199 if (boundary) {
200 strbuf_release(boundary);
201 free(boundary);
205 static void handle_content_transfer_encoding(const struct strbuf *line)
207 if (strcasestr(line->buf, "base64"))
208 transfer_encoding = TE_BASE64;
209 else if (strcasestr(line->buf, "quoted-printable"))
210 transfer_encoding = TE_QP;
211 else
212 transfer_encoding = TE_DONTCARE;
215 static int is_multipart_boundary(const struct strbuf *line)
217 return (((*content_top)->len <= line->len) &&
218 !memcmp(line->buf, (*content_top)->buf, (*content_top)->len));
221 static void cleanup_subject(struct strbuf *subject)
223 char *pos;
224 size_t remove;
225 while (subject->len) {
226 switch (*subject->buf) {
227 case 'r': case 'R':
228 if (subject->len <= 3)
229 break;
230 if (!memcmp(subject->buf + 1, "e:", 2)) {
231 strbuf_remove(subject, 0, 3);
232 continue;
234 break;
235 case ' ': case '\t': case ':':
236 strbuf_remove(subject, 0, 1);
237 continue;
238 case '[':
239 if ((pos = strchr(subject->buf, ']'))) {
240 remove = pos - subject->buf;
241 if (remove <= (subject->len - remove) * 2) {
242 strbuf_remove(subject, 0, remove + 1);
243 continue;
245 } else
246 strbuf_remove(subject, 0, 1);
247 break;
249 strbuf_trim(subject);
250 return;
254 static void cleanup_space(struct strbuf *sb)
256 size_t pos, cnt;
257 for (pos = 0; pos < sb->len; pos++) {
258 if (isspace(sb->buf[pos])) {
259 sb->buf[pos] = ' ';
260 for (cnt = 0; isspace(sb->buf[pos + cnt + 1]); cnt++);
261 strbuf_remove(sb, pos + 1, cnt);
266 static void decode_header(struct strbuf *line);
267 static const char *header[MAX_HDR_PARSED] = {
268 "From","Subject","Date",
271 static inline int cmp_header(const struct strbuf *line, const char *hdr)
273 int len = strlen(hdr);
274 return !strncasecmp(line->buf, hdr, len) && line->len > len &&
275 line->buf[len] == ':' && isspace(line->buf[len + 1]);
278 static int check_header(const struct strbuf *line,
279 struct strbuf *hdr_data[], int overwrite)
281 int i, ret = 0, len;
282 struct strbuf sb = STRBUF_INIT;
283 /* search for the interesting parts */
284 for (i = 0; header[i]; i++) {
285 int len = strlen(header[i]);
286 if ((!hdr_data[i] || overwrite) && cmp_header(line, header[i])) {
287 /* Unwrap inline B and Q encoding, and optionally
288 * normalize the meta information to utf8.
290 strbuf_add(&sb, line->buf + len + 2, line->len - len - 2);
291 decode_header(&sb);
292 handle_header(&hdr_data[i], &sb);
293 ret = 1;
294 goto check_header_out;
298 /* Content stuff */
299 if (cmp_header(line, "Content-Type")) {
300 len = strlen("Content-Type: ");
301 strbuf_add(&sb, line->buf + len, line->len - len);
302 decode_header(&sb);
303 strbuf_insert(&sb, 0, "Content-Type: ", len);
304 handle_content_type(&sb);
305 ret = 1;
306 goto check_header_out;
308 if (cmp_header(line, "Content-Transfer-Encoding")) {
309 len = strlen("Content-Transfer-Encoding: ");
310 strbuf_add(&sb, line->buf + len, line->len - len);
311 decode_header(&sb);
312 handle_content_transfer_encoding(&sb);
313 ret = 1;
314 goto check_header_out;
317 /* for inbody stuff */
318 if (!prefixcmp(line->buf, ">From") && isspace(line->buf[5])) {
319 ret = 1; /* Should this return 0? */
320 goto check_header_out;
322 if (!prefixcmp(line->buf, "[PATCH]") && isspace(line->buf[7])) {
323 for (i = 0; header[i]; i++) {
324 if (!memcmp("Subject", header[i], 7)) {
325 handle_header(&hdr_data[i], line);
326 ret = 1;
327 goto check_header_out;
332 check_header_out:
333 strbuf_release(&sb);
334 return ret;
337 static int is_rfc2822_header(const struct strbuf *line)
340 * The section that defines the loosest possible
341 * field name is "3.6.8 Optional fields".
343 * optional-field = field-name ":" unstructured CRLF
344 * field-name = 1*ftext
345 * ftext = %d33-57 / %59-126
347 int ch;
348 char *cp = line->buf;
350 /* Count mbox From headers as headers */
351 if (!prefixcmp(cp, "From ") || !prefixcmp(cp, ">From "))
352 return 1;
354 while ((ch = *cp++)) {
355 if (ch == ':')
356 return 1;
357 if ((33 <= ch && ch <= 57) ||
358 (59 <= ch && ch <= 126))
359 continue;
360 break;
362 return 0;
365 static int read_one_header_line(struct strbuf *line, FILE *in)
367 /* Get the first part of the line. */
368 if (strbuf_getline(line, in, '\n'))
369 return 0;
372 * Is it an empty line or not a valid rfc2822 header?
373 * If so, stop here, and return false ("not a header")
375 strbuf_rtrim(line);
376 if (!line->len || !is_rfc2822_header(line)) {
377 /* Re-add the newline */
378 strbuf_addch(line, '\n');
379 return 0;
383 * Now we need to eat all the continuation lines..
384 * Yuck, 2822 header "folding"
386 for (;;) {
387 int peek;
388 struct strbuf continuation = STRBUF_INIT;
390 peek = fgetc(in); ungetc(peek, in);
391 if (peek != ' ' && peek != '\t')
392 break;
393 if (strbuf_getline(&continuation, in, '\n'))
394 break;
395 continuation.buf[0] = '\n';
396 strbuf_rtrim(&continuation);
397 strbuf_addbuf(line, &continuation);
400 return 1;
403 static struct strbuf *decode_q_segment(const struct strbuf *q_seg, int rfc2047)
405 const char *in = q_seg->buf;
406 int c;
407 struct strbuf *out = xmalloc(sizeof(struct strbuf));
408 strbuf_init(out, q_seg->len);
410 while ((c = *in++) != 0) {
411 if (c == '=') {
412 int d = *in++;
413 if (d == '\n' || !d)
414 break; /* drop trailing newline */
415 strbuf_addch(out, (hexval(d) << 4) | hexval(*in++));
416 continue;
418 if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */
419 c = 0x20;
420 strbuf_addch(out, c);
422 return out;
425 static struct strbuf *decode_b_segment(const struct strbuf *b_seg)
427 /* Decode in..ep, possibly in-place to ot */
428 int c, pos = 0, acc = 0;
429 const char *in = b_seg->buf;
430 struct strbuf *out = xmalloc(sizeof(struct strbuf));
431 strbuf_init(out, b_seg->len);
433 while ((c = *in++) != 0) {
434 if (c == '+')
435 c = 62;
436 else if (c == '/')
437 c = 63;
438 else if ('A' <= c && c <= 'Z')
439 c -= 'A';
440 else if ('a' <= c && c <= 'z')
441 c -= 'a' - 26;
442 else if ('0' <= c && c <= '9')
443 c -= '0' - 52;
444 else
445 continue; /* garbage */
446 switch (pos++) {
447 case 0:
448 acc = (c << 2);
449 break;
450 case 1:
451 strbuf_addch(out, (acc | (c >> 4)));
452 acc = (c & 15) << 4;
453 break;
454 case 2:
455 strbuf_addch(out, (acc | (c >> 2)));
456 acc = (c & 3) << 6;
457 break;
458 case 3:
459 strbuf_addch(out, (acc | c));
460 acc = pos = 0;
461 break;
464 return out;
468 * When there is no known charset, guess.
470 * Right now we assume that if the target is UTF-8 (the default),
471 * and it already looks like UTF-8 (which includes US-ASCII as its
472 * subset, of course) then that is what it is and there is nothing
473 * to do.
475 * Otherwise, we default to assuming it is Latin1 for historical
476 * reasons.
478 static const char *guess_charset(const struct strbuf *line, const char *target_charset)
480 if (is_encoding_utf8(target_charset)) {
481 if (is_utf8(line->buf))
482 return NULL;
484 return "latin1";
487 static void convert_to_utf8(struct strbuf *line, const char *charset)
489 char *out;
491 if (!charset || !*charset) {
492 charset = guess_charset(line, metainfo_charset);
493 if (!charset)
494 return;
497 if (!strcmp(metainfo_charset, charset))
498 return;
499 out = reencode_string(line->buf, metainfo_charset, charset);
500 if (!out)
501 die("cannot convert from %s to %s",
502 charset, metainfo_charset);
503 strbuf_attach(line, out, strlen(out), strlen(out));
506 static int decode_header_bq(struct strbuf *it)
508 char *in, *ep, *cp;
509 struct strbuf outbuf = STRBUF_INIT, *dec;
510 struct strbuf charset_q = STRBUF_INIT, piecebuf = STRBUF_INIT;
511 int rfc2047 = 0;
513 in = it->buf;
514 while (in - it->buf <= it->len && (ep = strstr(in, "=?")) != NULL) {
515 int encoding;
516 strbuf_reset(&charset_q);
517 strbuf_reset(&piecebuf);
518 rfc2047 = 1;
520 if (in != ep) {
522 * We are about to process an encoded-word
523 * that begins at ep, but there is something
524 * before the encoded word.
526 char *scan;
527 for (scan = in; scan < ep; scan++)
528 if (!isspace(*scan))
529 break;
531 if (scan != ep || in == it->buf) {
533 * We should not lose that "something",
534 * unless we have just processed an
535 * encoded-word, and there is only LWS
536 * before the one we are about to process.
538 strbuf_add(&outbuf, in, ep - in);
541 /* E.g.
542 * ep : "=?iso-2022-jp?B?GyR...?= foo"
543 * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz"
545 ep += 2;
547 if (ep - it->buf >= it->len || !(cp = strchr(ep, '?')))
548 goto decode_header_bq_out;
550 if (cp + 3 - it->buf > it->len)
551 goto decode_header_bq_out;
552 strbuf_add(&charset_q, ep, cp - ep);
553 strbuf_tolower(&charset_q);
555 encoding = cp[1];
556 if (!encoding || cp[2] != '?')
557 goto decode_header_bq_out;
558 ep = strstr(cp + 3, "?=");
559 if (!ep)
560 goto decode_header_bq_out;
561 strbuf_add(&piecebuf, cp + 3, ep - cp - 3);
562 switch (tolower(encoding)) {
563 default:
564 goto decode_header_bq_out;
565 case 'b':
566 dec = decode_b_segment(&piecebuf);
567 break;
568 case 'q':
569 dec = decode_q_segment(&piecebuf, 1);
570 break;
572 if (metainfo_charset)
573 convert_to_utf8(dec, charset_q.buf);
575 strbuf_addbuf(&outbuf, dec);
576 strbuf_release(dec);
577 free(dec);
578 in = ep + 2;
580 strbuf_addstr(&outbuf, in);
581 strbuf_reset(it);
582 strbuf_addbuf(it, &outbuf);
583 decode_header_bq_out:
584 strbuf_release(&outbuf);
585 strbuf_release(&charset_q);
586 strbuf_release(&piecebuf);
587 return rfc2047;
590 static void decode_header(struct strbuf *it)
592 if (decode_header_bq(it))
593 return;
594 /* otherwise "it" is a straight copy of the input.
595 * This can be binary guck but there is no charset specified.
597 if (metainfo_charset)
598 convert_to_utf8(it, "");
601 static void decode_transfer_encoding(struct strbuf *line)
603 struct strbuf *ret;
605 switch (transfer_encoding) {
606 case TE_QP:
607 ret = decode_q_segment(line, 0);
608 break;
609 case TE_BASE64:
610 ret = decode_b_segment(line);
611 break;
612 case TE_DONTCARE:
613 default:
614 return;
616 strbuf_reset(line);
617 strbuf_addbuf(line, ret);
618 strbuf_release(ret);
619 free(ret);
622 static void handle_filter(struct strbuf *line);
624 static int find_boundary(void)
626 while (!strbuf_getline(&line, fin, '\n')) {
627 if (*content_top && is_multipart_boundary(&line))
628 return 1;
630 return 0;
633 static int handle_boundary(void)
635 struct strbuf newline = STRBUF_INIT;
637 strbuf_addch(&newline, '\n');
638 again:
639 if (line.len >= (*content_top)->len + 2 &&
640 !memcmp(line.buf + (*content_top)->len, "--", 2)) {
641 /* we hit an end boundary */
642 /* pop the current boundary off the stack */
643 strbuf_release(*content_top);
644 free(*content_top);
645 *content_top = NULL;
647 /* technically won't happen as is_multipart_boundary()
648 will fail first. But just in case..
650 if (--content_top < content) {
651 fprintf(stderr, "Detected mismatched boundaries, "
652 "can't recover\n");
653 exit(1);
655 handle_filter(&newline);
656 strbuf_release(&newline);
658 /* skip to the next boundary */
659 if (!find_boundary())
660 return 0;
661 goto again;
664 /* set some defaults */
665 transfer_encoding = TE_DONTCARE;
666 strbuf_reset(&charset);
667 message_type = TYPE_TEXT;
669 /* slurp in this section's info */
670 while (read_one_header_line(&line, fin))
671 check_header(&line, p_hdr_data, 0);
673 strbuf_release(&newline);
674 /* replenish line */
675 if (strbuf_getline(&line, fin, '\n'))
676 return 0;
677 strbuf_addch(&line, '\n');
678 return 1;
681 static inline int patchbreak(const struct strbuf *line)
683 size_t i;
685 /* Beginning of a "diff -" header? */
686 if (!prefixcmp(line->buf, "diff -"))
687 return 1;
689 /* CVS "Index: " line? */
690 if (!prefixcmp(line->buf, "Index: "))
691 return 1;
694 * "--- <filename>" starts patches without headers
695 * "---<sp>*" is a manual separator
697 if (line->len < 4)
698 return 0;
700 if (!prefixcmp(line->buf, "---")) {
701 /* space followed by a filename? */
702 if (line->buf[3] == ' ' && !isspace(line->buf[4]))
703 return 1;
704 /* Just whitespace? */
705 for (i = 3; i < line->len; i++) {
706 unsigned char c = line->buf[i];
707 if (c == '\n')
708 return 1;
709 if (!isspace(c))
710 break;
712 return 0;
714 return 0;
717 static int handle_commit_msg(struct strbuf *line)
719 static int still_looking = 1;
721 if (!cmitmsg)
722 return 0;
724 if (still_looking) {
725 strbuf_ltrim(line);
726 if (!line->len)
727 return 0;
728 if ((still_looking = check_header(line, s_hdr_data, 0)) != 0)
729 return 0;
732 /* normalize the log message to UTF-8. */
733 if (metainfo_charset)
734 convert_to_utf8(line, charset.buf);
736 if (patchbreak(line)) {
737 fclose(cmitmsg);
738 cmitmsg = NULL;
739 return 1;
742 fputs(line->buf, cmitmsg);
743 return 0;
746 static void handle_patch(const struct strbuf *line)
748 fwrite(line->buf, 1, line->len, patchfile);
749 patch_lines++;
752 static void handle_filter(struct strbuf *line)
754 static int filter = 0;
756 /* filter tells us which part we left off on */
757 switch (filter) {
758 case 0:
759 if (!handle_commit_msg(line))
760 break;
761 filter++;
762 case 1:
763 handle_patch(line);
764 break;
768 static void handle_body(void)
770 int len = 0;
771 struct strbuf prev = STRBUF_INIT;
773 /* Skip up to the first boundary */
774 if (*content_top) {
775 if (!find_boundary())
776 goto handle_body_out;
779 do {
780 strbuf_setlen(&line, line.len + len);
782 /* process any boundary lines */
783 if (*content_top && is_multipart_boundary(&line)) {
784 /* flush any leftover */
785 if (prev.len) {
786 handle_filter(&prev);
787 strbuf_reset(&prev);
789 if (!handle_boundary())
790 goto handle_body_out;
793 /* Unwrap transfer encoding */
794 decode_transfer_encoding(&line);
796 switch (transfer_encoding) {
797 case TE_BASE64:
798 case TE_QP:
800 struct strbuf **lines, **it, *sb;
802 /* Prepend any previous partial lines */
803 strbuf_insert(&line, 0, prev.buf, prev.len);
804 strbuf_reset(&prev);
806 /* binary data most likely doesn't have newlines */
807 if (message_type != TYPE_TEXT) {
808 handle_filter(&line);
809 break;
812 * This is a decoded line that may contain
813 * multiple new lines. Pass only one chunk
814 * at a time to handle_filter()
816 lines = strbuf_split(&line, '\n');
817 for (it = lines; (sb = *it); it++) {
818 if (*(it + 1) == NULL) /* The last line */
819 if (sb->buf[sb->len - 1] != '\n') {
820 /* Partial line, save it for later. */
821 strbuf_addbuf(&prev, sb);
822 break;
824 handle_filter(sb);
827 * The partial chunk is saved in "prev" and will be
828 * appended by the next iteration of read_line_with_nul().
830 strbuf_list_free(lines);
831 break;
833 default:
834 handle_filter(&line);
837 strbuf_reset(&line);
838 if (strbuf_avail(&line) < 100)
839 strbuf_grow(&line, 100);
840 } while ((len = read_line_with_nul(line.buf, strbuf_avail(&line), fin)));
842 handle_body_out:
843 strbuf_release(&prev);
846 static void output_header_lines(FILE *fout, const char *hdr, const struct strbuf *data)
848 const char *sp = data->buf;
849 while (1) {
850 char *ep = strchr(sp, '\n');
851 int len;
852 if (!ep)
853 len = strlen(sp);
854 else
855 len = ep - sp;
856 fprintf(fout, "%s: %.*s\n", hdr, len, sp);
857 if (!ep)
858 break;
859 sp = ep + 1;
863 static void handle_info(void)
865 struct strbuf *hdr;
866 int i;
868 for (i = 0; header[i]; i++) {
869 /* only print inbody headers if we output a patch file */
870 if (patch_lines && s_hdr_data[i])
871 hdr = s_hdr_data[i];
872 else if (p_hdr_data[i])
873 hdr = p_hdr_data[i];
874 else
875 continue;
877 if (!memcmp(header[i], "Subject", 7)) {
878 if (!keep_subject) {
879 cleanup_subject(hdr);
880 cleanup_space(hdr);
882 output_header_lines(fout, "Subject", hdr);
883 } else if (!memcmp(header[i], "From", 4)) {
884 cleanup_space(hdr);
885 handle_from(hdr);
886 fprintf(fout, "Author: %s\n", name.buf);
887 fprintf(fout, "Email: %s\n", email.buf);
888 } else {
889 cleanup_space(hdr);
890 fprintf(fout, "%s: %s\n", header[i], hdr->buf);
893 fprintf(fout, "\n");
896 static int mailinfo(FILE *in, FILE *out, int ks, const char *encoding,
897 const char *msg, const char *patch)
899 int peek;
900 keep_subject = ks;
901 metainfo_charset = encoding;
902 fin = in;
903 fout = out;
905 cmitmsg = fopen(msg, "w");
906 if (!cmitmsg) {
907 perror(msg);
908 return -1;
910 patchfile = fopen(patch, "w");
911 if (!patchfile) {
912 perror(patch);
913 fclose(cmitmsg);
914 return -1;
917 p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*p_hdr_data));
918 s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*s_hdr_data));
920 do {
921 peek = fgetc(in);
922 } while (isspace(peek));
923 ungetc(peek, in);
925 /* process the email header */
926 while (read_one_header_line(&line, fin))
927 check_header(&line, p_hdr_data, 1);
929 handle_body();
930 handle_info();
932 return 0;
935 static const char mailinfo_usage[] =
936 "git mailinfo [-k] [-u | --encoding=<encoding> | -n] msg patch <mail >info";
938 int cmd_mailinfo(int argc, const char **argv, const char *prefix)
940 const char *def_charset;
942 /* NEEDSWORK: might want to do the optional .git/ directory
943 * discovery
945 git_config(git_default_config, NULL);
947 def_charset = (git_commit_encoding ? git_commit_encoding : "utf-8");
948 metainfo_charset = def_charset;
950 while (1 < argc && argv[1][0] == '-') {
951 if (!strcmp(argv[1], "-k"))
952 keep_subject = 1;
953 else if (!strcmp(argv[1], "-u"))
954 metainfo_charset = def_charset;
955 else if (!strcmp(argv[1], "-n"))
956 metainfo_charset = NULL;
957 else if (!prefixcmp(argv[1], "--encoding="))
958 metainfo_charset = argv[1] + 11;
959 else
960 usage(mailinfo_usage);
961 argc--; argv++;
964 if (argc != 3)
965 usage(mailinfo_usage);
967 return !!mailinfo(stdin, stdout, keep_subject, metainfo_charset, argv[1], argv[2]);