Document "git stash message..."
[git/git.git] / builtin-mailinfo.c
CommitLineData
2744b234
LT
1/*
2 * Another stupid program, this one parsing the headers of an
3 * email to figure out authorship and subject
4 */
f1f909e3 5#include "cache.h"
34488e3c 6#include "builtin.h"
b45974a6 7#include "utf8.h"
2744b234 8
34488e3c 9static FILE *cmitmsg, *patchfile, *fin, *fout;
2744b234 10
96f1e58f
DR
11static int keep_subject;
12static const char *metainfo_charset;
2744b234
LT
13static char line[1000];
14static char name[1000];
15static char email[1000];
2744b234 16
d4a9ce78
JH
17static enum {
18 TE_DONTCARE, TE_QP, TE_BASE64,
19} transfer_encoding;
87ab7992
DZ
20static enum {
21 TYPE_TEXT, TYPE_OTHER,
22} message_type;
d4a9ce78 23
87ab7992 24static char charset[256];
96f1e58f 25static int patch_lines;
87ab7992
DZ
26static char **p_hdr_data, **s_hdr_data;
27
28#define MAX_HDR_PARSED 10
29#define MAX_BOUNDARIES 5
d4a9ce78 30
2744b234
LT
31static char *sanity_check(char *name, char *email)
32{
33 int len = strlen(name);
34 if (len < 3 || len > 60)
35 return email;
36 if (strchr(name, '@') || strchr(name, '<') || strchr(name, '>'))
37 return email;
38 return name;
39}
40
e0e3ba20
JH
41static int bogus_from(char *line)
42{
43 /* John Doe <johndoe> */
44 char *bra, *ket, *dst, *cp;
45
46 /* This is fallback, so do not bother if we already have an
47 * e-mail address.
34488e3c 48 */
e0e3ba20
JH
49 if (*email)
50 return 0;
51
52 bra = strchr(line, '<');
53 if (!bra)
54 return 0;
55 ket = strchr(bra, '>');
56 if (!ket)
57 return 0;
58
59 for (dst = email, cp = bra+1; cp < ket; )
60 *dst++ = *cp++;
61 *dst = 0;
62 for (cp = line; isspace(*cp); cp++)
63 ;
64 for (bra--; isspace(*bra); bra--)
65 *bra = 0;
66 cp = sanity_check(cp, email);
67 strcpy(name, cp);
68 return 1;
69}
70
2dec02b1 71static int handle_from(char *in_line)
2744b234 72{
2dec02b1
EB
73 char line[1000];
74 char *at;
2744b234
LT
75 char *dst;
76
2dec02b1
EB
77 strcpy(line, in_line);
78 at = strchr(line, '@');
2744b234 79 if (!at)
e0e3ba20 80 return bogus_from(line);
2744b234
LT
81
82 /*
83 * If we already have one email, don't take any confusing lines
84 */
85 if (*email && strchr(at+1, '@'))
86 return 0;
87
d4a9ce78
JH
88 /* Pick up the string around '@', possibly delimited with <>
89 * pair; that is the email part. White them out while copying.
90 */
2744b234
LT
91 while (at > line) {
92 char c = at[-1];
d4a9ce78
JH
93 if (isspace(c))
94 break;
95 if (c == '<') {
96 at[-1] = ' ';
2744b234 97 break;
d4a9ce78 98 }
2744b234
LT
99 at--;
100 }
101 dst = email;
102 for (;;) {
103 unsigned char c = *at;
d4a9ce78
JH
104 if (!c || c == '>' || isspace(c)) {
105 if (c == '>')
106 *at = ' ';
2744b234 107 break;
d4a9ce78 108 }
2744b234
LT
109 *at++ = ' ';
110 *dst++ = c;
111 }
112 *dst++ = 0;
113
d4a9ce78
JH
114 /* The remainder is name. It could be "John Doe <john.doe@xz>"
115 * or "john.doe@xz (John Doe)", but we have whited out the
116 * email part, so trim from both ends, possibly removing
117 * the () pair at the end.
118 */
2744b234
LT
119 at = line + strlen(line);
120 while (at > line) {
121 unsigned char c = *--at;
d4a9ce78
JH
122 if (!isspace(c)) {
123 at[(c == ')') ? 0 : 1] = 0;
2744b234 124 break;
d4a9ce78 125 }
2744b234
LT
126 }
127
128 at = line;
129 for (;;) {
130 unsigned char c = *at;
d4a9ce78
JH
131 if (!c || !isspace(c)) {
132 if (c == '(')
133 at++;
2744b234 134 break;
d4a9ce78 135 }
2744b234
LT
136 at++;
137 }
2744b234 138 at = sanity_check(at, email);
2744b234
LT
139 strcpy(name, at);
140 return 1;
141}
142
87ab7992 143static int handle_header(char *line, char *data, int ofs)
62c1f6b4 144{
87ab7992
DZ
145 if (!line || !data)
146 return 1;
147
148 strcpy(data, line+ofs);
62c1f6b4 149
d4a9ce78
JH
150 return 0;
151}
152
153/* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt
154 * to have enough heuristics to grok MIME encoded patches often found
155 * on our mailing lists. For example, we do not even treat header lines
156 * case insensitively.
157 */
158
159static int slurp_attr(const char *line, const char *name, char *attr)
160{
554fe20d 161 const char *ends, *ap = strcasestr(line, name);
d4a9ce78
JH
162 size_t sz;
163
164 if (!ap) {
165 *attr = 0;
166 return 0;
167 }
168 ap += strlen(name);
169 if (*ap == '"') {
170 ap++;
171 ends = "\"";
172 }
173 else
174 ends = "; \t";
175 sz = strcspn(ap, ends);
176 memcpy(attr, ap, sz);
177 attr[sz] = 0;
178 return 1;
179}
180
87ab7992
DZ
181struct content_type {
182 char *boundary;
183 int boundary_len;
184};
185
186static struct content_type content[MAX_BOUNDARIES];
187
188static struct content_type *content_top = content;
189
190static int handle_content_type(char *line)
d4a9ce78 191{
87ab7992
DZ
192 char boundary[256];
193
194 if (strcasestr(line, "text/") == NULL)
195 message_type = TYPE_OTHER;
196 if (slurp_attr(line, "boundary=", boundary + 2)) {
197 memcpy(boundary, "--", 2);
198 if (content_top++ >= &content[MAX_BOUNDARIES]) {
199 fprintf(stderr, "Too many boundaries to handle\n");
200 exit(1);
201 }
202 content_top->boundary_len = strlen(boundary);
203 content_top->boundary = xmalloc(content_top->boundary_len+1);
204 strcpy(content_top->boundary, boundary);
b893f091 205 }
87ab7992 206 if (slurp_attr(line, "charset=", charset)) {
d4a9ce78
JH
207 int i, c;
208 for (i = 0; (c = charset[i]) != 0; i++)
209 charset[i] = tolower(c);
210 }
211 return 0;
212}
213
d4a9ce78
JH
214static int handle_content_transfer_encoding(char *line)
215{
216 if (strcasestr(line, "base64"))
217 transfer_encoding = TE_BASE64;
218 else if (strcasestr(line, "quoted-printable"))
219 transfer_encoding = TE_QP;
220 else
221 transfer_encoding = TE_DONTCARE;
222 return 0;
2744b234
LT
223}
224
d4a9ce78
JH
225static int is_multipart_boundary(const char *line)
226{
87ab7992 227 return (!memcmp(line, content_top->boundary, content_top->boundary_len));
d4a9ce78
JH
228}
229
230static int eatspace(char *line)
2744b234 231{
d4a9ce78
JH
232 int len = strlen(line);
233 while (len > 0 && isspace(line[len-1]))
234 line[--len] = 0;
235 return len;
2744b234
LT
236}
237
d4a9ce78 238static char *cleanup_subject(char *subject)
2744b234 239{
6bff6a60
JH
240 if (keep_subject)
241 return subject;
2744b234
LT
242 for (;;) {
243 char *p;
244 int len, remove;
245 switch (*subject) {
246 case 'r': case 'R':
247 if (!memcmp("e:", subject+1, 2)) {
87ab7992 248 subject += 3;
2744b234
LT
249 continue;
250 }
251 break;
252 case ' ': case '\t': case ':':
253 subject++;
254 continue;
255
256 case '[':
257 p = strchr(subject, ']');
258 if (!p) {
259 subject++;
260 continue;
261 }
262 len = strlen(p);
263 remove = p - subject;
264 if (remove <= len *2) {
265 subject = p+1;
266 continue;
34488e3c 267 }
2744b234
LT
268 break;
269 }
ae448e38 270 eatspace(subject);
2744b234
LT
271 return subject;
272 }
34488e3c 273}
2744b234
LT
274
275static void cleanup_space(char *buf)
276{
277 unsigned char c;
278 while ((c = *buf) != 0) {
279 buf++;
280 if (isspace(c)) {
281 buf[-1] = ' ';
282 c = *buf;
283 while (isspace(c)) {
284 int len = strlen(buf);
285 memmove(buf, buf+1, len);
286 c = *buf;
287 }
288 }
289 }
290}
291
b75bf2c3 292static void decode_header(char *it);
87ab7992
DZ
293static char *header[MAX_HDR_PARSED] = {
294 "From","Subject","Date",
d4a9ce78
JH
295};
296
86747c13 297static int check_header(char *line, char **hdr_data, int overwrite)
d4a9ce78
JH
298{
299 int i;
300
87ab7992
DZ
301 /* search for the interesting parts */
302 for (i = 0; header[i]; i++) {
303 int len = strlen(header[i]);
86747c13 304 if ((!hdr_data[i] || overwrite) &&
87ab7992 305 !strncasecmp(line, header[i], len) &&
d4a9ce78 306 line[len] == ':' && isspace(line[len + 1])) {
33504530
EB
307 /* Unwrap inline B and Q encoding, and optionally
308 * normalize the meta information to utf8.
309 */
b75bf2c3 310 decode_header(line + len + 2);
87ab7992
DZ
311 hdr_data[i] = xmalloc(1000 * sizeof(char));
312 if (! handle_header(line, hdr_data[i], len + 2)) {
313 return 1;
314 }
d4a9ce78
JH
315 }
316 }
d4a9ce78 317
87ab7992
DZ
318 /* Content stuff */
319 if (!strncasecmp(line, "Content-Type", 12) &&
320 line[12] == ':' && isspace(line[12 + 1])) {
321 decode_header(line + 12 + 2);
322 if (! handle_content_type(line)) {
323 return 1;
324 }
325 }
326 if (!strncasecmp(line, "Content-Transfer-Encoding", 25) &&
327 line[25] == ':' && isspace(line[25 + 1])) {
328 decode_header(line + 25 + 2);
329 if (! handle_content_transfer_encoding(line)) {
330 return 1;
331 }
332 }
333
334 /* for inbody stuff */
335 if (!memcmp(">From", line, 5) && isspace(line[5]))
336 return 1;
337 if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) {
338 for (i = 0; header[i]; i++) {
339 if (!memcmp("Subject: ", header[i], 9)) {
340 if (! handle_header(line, hdr_data[i], 0)) {
341 return 1;
342 }
343 }
344 }
345 }
346
347 /* no match */
348 return 0;
d4a9ce78
JH
349}
350
ef29c117
JH
351static int is_rfc2822_header(char *line)
352{
353 /*
354 * The section that defines the loosest possible
355 * field name is "3.6.8 Optional fields".
356 *
357 * optional-field = field-name ":" unstructured CRLF
358 * field-name = 1*ftext
359 * ftext = %d33-57 / %59-126
360 */
361 int ch;
362 char *cp = line;
34fc5cef
LT
363
364 /* Count mbox From headers as headers */
365 if (!memcmp(line, "From ", 5) || !memcmp(line, ">From ", 6))
366 return 1;
367
ef29c117
JH
368 while ((ch = *cp++)) {
369 if (ch == ':')
370 return cp != line;
371 if ((33 <= ch && ch <= 57) ||
372 (59 <= ch && ch <= 126))
373 continue;
374 break;
375 }
376 return 0;
377}
378
34fc5cef
LT
379/*
380 * sz is size of 'line' buffer in bytes. Must be reasonably
381 * long enough to hold one physical real-world e-mail line.
382 */
d4a9ce78
JH
383static int read_one_header_line(char *line, int sz, FILE *in)
384{
34fc5cef
LT
385 int len;
386
387 /*
388 * We will read at most (sz-1) bytes and then potentially
389 * re-add NUL after it. Accessing line[sz] after this is safe
390 * and we can allow len to grow up to and including sz.
391 */
392 sz--;
393
394 /* Get the first part of the line. */
395 if (!fgets(line, sz, in))
396 return 0;
397
398 /*
399 * Is it an empty line or not a valid rfc2822 header?
400 * If so, stop here, and return false ("not a header")
401 */
402 len = eatspace(line);
403 if (!len || !is_rfc2822_header(line)) {
404 /* Re-add the newline */
405 line[len] = '\n';
406 line[len + 1] = '\0';
407 return 0;
408 }
409
410 /*
411 * Now we need to eat all the continuation lines..
412 * Yuck, 2822 header "folding"
413 */
414 for (;;) {
415 int peek, addlen;
416 static char continuation[1000];
417
f30b2028
EB
418 peek = fgetc(in); ungetc(peek, in);
419 if (peek != ' ' && peek != '\t')
420 break;
34fc5cef
LT
421 if (!fgets(continuation, sizeof(continuation), in))
422 break;
423 addlen = eatspace(continuation);
424 if (len < sz - 1) {
425 if (addlen >= sz - len)
426 addlen = sz - len - 1;
427 memcpy(line + len, continuation, addlen);
428 len += addlen;
429 }
d4a9ce78 430 }
34fc5cef
LT
431 line[len] = 0;
432
433 return 1;
d4a9ce78
JH
434}
435
75731930 436static int decode_q_segment(char *in, char *ot, char *ep, int rfc2047)
d4a9ce78
JH
437{
438 int c;
439 while ((c = *in++) != 0 && (in <= ep)) {
440 if (c == '=') {
441 int d = *in++;
442 if (d == '\n' || !d)
443 break; /* drop trailing newline */
444 *ot++ = ((hexval(d) << 4) | hexval(*in++));
75731930 445 continue;
d4a9ce78 446 }
75731930
JH
447 if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */
448 c = 0x20;
449 *ot++ = c;
d4a9ce78
JH
450 }
451 *ot = 0;
452 return 0;
453}
454
455static int decode_b_segment(char *in, char *ot, char *ep)
456{
457 /* Decode in..ep, possibly in-place to ot */
458 int c, pos = 0, acc = 0;
459
460 while ((c = *in++) != 0 && (in <= ep)) {
461 if (c == '+')
462 c = 62;
463 else if (c == '/')
464 c = 63;
465 else if ('A' <= c && c <= 'Z')
466 c -= 'A';
467 else if ('a' <= c && c <= 'z')
468 c -= 'a' - 26;
469 else if ('0' <= c && c <= '9')
470 c -= '0' - 52;
471 else if (c == '=') {
472 /* padding is almost like (c == 0), except we do
473 * not output NUL resulting only from it;
474 * for now we just trust the data.
475 */
476 c = 0;
477 }
478 else
479 continue; /* garbage */
480 switch (pos++) {
481 case 0:
482 acc = (c << 2);
483 break;
484 case 1:
485 *ot++ = (acc | (c >> 4));
486 acc = (c & 15) << 4;
487 break;
488 case 2:
489 *ot++ = (acc | (c >> 2));
490 acc = (c & 3) << 6;
491 break;
492 case 3:
493 *ot++ = (acc | c);
494 acc = pos = 0;
495 break;
496 }
497 }
498 *ot = 0;
499 return 0;
500}
501
3a55602e 502static void convert_to_utf8(char *line, const char *charset)
d4a9ce78 503{
3a55602e
SP
504 static const char latin_one[] = "latin1";
505 const char *input_charset = *charset ? charset : latin_one;
b45974a6
JH
506 char *out = reencode_string(line, metainfo_charset, input_charset);
507
bb1091a4
JH
508 if (!out)
509 die("cannot convert from %s to %s\n",
510 input_charset, metainfo_charset);
b45974a6
JH
511 strcpy(line, out);
512 free(out);
d4a9ce78
JH
513}
514
b75bf2c3 515static int decode_header_bq(char *it)
d4a9ce78
JH
516{
517 char *in, *out, *ep, *cp, *sp;
518 char outbuf[1000];
b75bf2c3 519 int rfc2047 = 0;
d4a9ce78
JH
520
521 in = it;
522 out = outbuf;
523 while ((ep = strstr(in, "=?")) != NULL) {
524 int sz, encoding;
525 char charset_q[256], piecebuf[256];
b75bf2c3
JH
526 rfc2047 = 1;
527
d4a9ce78
JH
528 if (in != ep) {
529 sz = ep - in;
530 memcpy(out, in, sz);
531 out += sz;
532 in += sz;
533 }
534 /* E.g.
535 * ep : "=?iso-2022-jp?B?GyR...?= foo"
536 * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz"
537 */
538 ep += 2;
539 cp = strchr(ep, '?');
540 if (!cp)
b75bf2c3 541 return rfc2047; /* no munging */
d4a9ce78
JH
542 for (sp = ep; sp < cp; sp++)
543 charset_q[sp - ep] = tolower(*sp);
544 charset_q[cp - ep] = 0;
545 encoding = cp[1];
546 if (!encoding || cp[2] != '?')
b75bf2c3 547 return rfc2047; /* no munging */
d4a9ce78
JH
548 ep = strstr(cp + 3, "?=");
549 if (!ep)
b75bf2c3 550 return rfc2047; /* no munging */
d4a9ce78
JH
551 switch (tolower(encoding)) {
552 default:
b75bf2c3 553 return rfc2047; /* no munging */
d4a9ce78
JH
554 case 'b':
555 sz = decode_b_segment(cp + 3, piecebuf, ep);
556 break;
557 case 'q':
75731930 558 sz = decode_q_segment(cp + 3, piecebuf, ep, 1);
d4a9ce78
JH
559 break;
560 }
561 if (sz < 0)
b75bf2c3 562 return rfc2047;
650e4be5 563 if (metainfo_charset)
d4a9ce78
JH
564 convert_to_utf8(piecebuf, charset_q);
565 strcpy(out, piecebuf);
566 out += strlen(out);
567 in = ep + 2;
568 }
569 strcpy(out, in);
570 strcpy(it, outbuf);
b75bf2c3
JH
571 return rfc2047;
572}
573
574static void decode_header(char *it)
575{
576
577 if (decode_header_bq(it))
578 return;
579 /* otherwise "it" is a straight copy of the input.
580 * This can be binary guck but there is no charset specified.
581 */
582 if (metainfo_charset)
583 convert_to_utf8(it, "");
d4a9ce78
JH
584}
585
586static void decode_transfer_encoding(char *line)
587{
588 char *ep;
589
590 switch (transfer_encoding) {
591 case TE_QP:
592 ep = line + strlen(line);
75731930 593 decode_q_segment(line, line, ep, 0);
d4a9ce78
JH
594 break;
595 case TE_BASE64:
596 ep = line + strlen(line);
597 decode_b_segment(line, line, ep);
598 break;
599 case TE_DONTCARE:
600 break;
601 }
602}
603
87ab7992
DZ
604static int handle_filter(char *line);
605
606static int find_boundary(void)
2744b234 607{
87ab7992
DZ
608 while(fgets(line, sizeof(line), fin) != NULL) {
609 if (is_multipart_boundary(line))
610 return 1;
611 }
612 return 0;
613}
614
615static int handle_boundary(void)
616{
86747c13 617 char newline[]="\n";
87ab7992
DZ
618again:
619 if (!memcmp(line+content_top->boundary_len, "--", 2)) {
620 /* we hit an end boundary */
621 /* pop the current boundary off the stack */
622 free(content_top->boundary);
623
624 /* technically won't happen as is_multipart_boundary()
625 will fail first. But just in case..
626 */
627 if (content_top-- < content) {
628 fprintf(stderr, "Detected mismatched boundaries, "
629 "can't recover\n");
630 exit(1);
631 }
86747c13 632 handle_filter(newline);
87ab7992
DZ
633
634 /* skip to the next boundary */
635 if (!find_boundary())
636 return 0;
637 goto again;
638 }
639
640 /* set some defaults */
641 transfer_encoding = TE_DONTCARE;
642 charset[0] = 0;
643 message_type = TYPE_TEXT;
d4a9ce78 644
87ab7992
DZ
645 /* slurp in this section's info */
646 while (read_one_header_line(line, sizeof(line), fin))
86747c13 647 check_header(line, p_hdr_data, 0);
2744b234 648
87ab7992
DZ
649 /* eat the blank line after section info */
650 return (fgets(line, sizeof(line), fin) != NULL);
d4a9ce78
JH
651}
652
f0658cf2
DZ
653static inline int patchbreak(const char *line)
654{
655 /* Beginning of a "diff -" header? */
656 if (!memcmp("diff -", line, 6))
657 return 1;
658
659 /* CVS "Index: " line? */
660 if (!memcmp("Index: ", line, 7))
661 return 1;
662
663 /*
664 * "--- <filename>" starts patches without headers
665 * "---<sp>*" is a manual separator
666 */
667 if (!memcmp("---", line, 3)) {
668 line += 3;
669 /* space followed by a filename? */
670 if (line[0] == ' ' && !isspace(line[1]))
671 return 1;
672 /* Just whitespace? */
673 for (;;) {
674 unsigned char c = *line++;
675 if (c == '\n')
676 return 1;
677 if (!isspace(c))
678 break;
679 }
680 return 0;
681 }
682 return 0;
683}
684
685
87ab7992 686static int handle_commit_msg(char *line)
d4a9ce78 687{
87ab7992
DZ
688 static int still_looking = 1;
689
d4a9ce78
JH
690 if (!cmitmsg)
691 return 0;
2744b234 692
87ab7992
DZ
693 if (still_looking) {
694 char *cp = line;
695 if (isspace(*line)) {
696 for (cp = line + 1; *cp; cp++) {
697 if (!isspace(*cp))
698 break;
699 }
700 if (!*cp)
701 return 0;
702 }
86747c13 703 if ((still_looking = check_header(cp, s_hdr_data, 0)) != 0)
87ab7992
DZ
704 return 0;
705 }
8b4525fb 706
86747c13
DZ
707 /* normalize the log message to UTF-8. */
708 if (metainfo_charset)
709 convert_to_utf8(line, charset);
710
f0658cf2 711 if (patchbreak(line)) {
87ab7992
DZ
712 fclose(cmitmsg);
713 cmitmsg = NULL;
714 return 1;
715 }
8b4525fb 716
87ab7992 717 fputs(line, cmitmsg);
d4a9ce78 718 return 0;
2744b234
LT
719}
720
87ab7992 721static int handle_patch(char *line)
2744b234 722{
87ab7992
DZ
723 fputs(line, patchfile);
724 patch_lines++;
725 return 0;
2744b234
LT
726}
727
87ab7992 728static int handle_filter(char *line)
2744b234 729{
87ab7992 730 static int filter = 0;
2744b234 731
87ab7992
DZ
732 /* filter tells us which part we left off on
733 * a non-zero return indicates we hit a filter point
734 */
735 switch (filter) {
736 case 0:
737 if (!handle_commit_msg(line))
d4a9ce78 738 break;
87ab7992
DZ
739 filter++;
740 case 1:
741 if (!handle_patch(line))
742 break;
743 filter++;
744 default:
745 return 1;
2744b234 746 }
87ab7992 747
d4a9ce78 748 return 0;
2744b234
LT
749}
750
87ab7992 751static void handle_body(void)
1d8fa411 752{
87ab7992
DZ
753 int rc = 0;
754 static char newline[2000];
755 static char *np = newline;
d4a9ce78
JH
756
757 /* Skip up to the first boundary */
87ab7992
DZ
758 if (content_top->boundary) {
759 if (!find_boundary())
760 return;
761 }
762
763 do {
764 /* process any boundary lines */
765 if (content_top->boundary && is_multipart_boundary(line)) {
766 /* flush any leftover */
767 if ((transfer_encoding == TE_BASE64) &&
768 (np != newline)) {
769 handle_filter(newline);
770 }
771 if (!handle_boundary())
772 return;
773 }
774
86747c13 775 /* Unwrap transfer encoding */
87ab7992 776 decode_transfer_encoding(line);
87ab7992
DZ
777
778 switch (transfer_encoding) {
779 case TE_BASE64:
780 {
781 char *op = line;
782
783 /* binary data most likely doesn't have newlines */
784 if (message_type != TYPE_TEXT) {
785 rc = handle_filter(line);
786 break;
787 }
788
789 /* this is a decoded line that may contain
790 * multiple new lines. Pass only one chunk
791 * at a time to handle_filter()
792 */
793
794 do {
795 while (*op != '\n' && *op != 0)
796 *np++ = *op++;
797 *np = *op;
798 if (*np != 0) {
799 /* should be sitting on a new line */
800 *(++np) = 0;
801 op++;
802 rc = handle_filter(newline);
803 np = newline;
804 }
805 } while (*op != 0);
806 /* the partial chunk is saved in newline and
807 * will be appended by the next iteration of fgets
808 */
d4a9ce78 809 break;
1d8fa411 810 }
87ab7992
DZ
811 default:
812 rc = handle_filter(line);
d4a9ce78 813 }
87ab7992
DZ
814 if (rc)
815 /* nothing left to filter */
816 break;
817 } while (fgets(line, sizeof(line), fin));
818
819 return;
1d8fa411
JH
820}
821
87ab7992 822static void handle_info(void)
2744b234 823{
87ab7992
DZ
824 char *sub;
825 char *hdr;
826 int i;
827
828 for (i = 0; header[i]; i++) {
829
830 /* only print inbody headers if we output a patch file */
831 if (patch_lines && s_hdr_data[i])
832 hdr = s_hdr_data[i];
833 else if (p_hdr_data[i])
834 hdr = p_hdr_data[i];
835 else
836 continue;
837
838 if (!memcmp(header[i], "Subject", 7)) {
839 sub = cleanup_subject(hdr);
840 cleanup_space(sub);
841 fprintf(fout, "Subject: %s\n", sub);
842 } else if (!memcmp(header[i], "From", 4)) {
843 handle_from(hdr);
844 fprintf(fout, "Author: %s\n", name);
845 fprintf(fout, "Email: %s\n", email);
846 } else {
847 cleanup_space(hdr);
848 fprintf(fout, "%s: %s\n", header[i], hdr);
849 }
d4a9ce78 850 }
87ab7992 851 fprintf(fout, "\n");
2744b234
LT
852}
853
fcd056a6
JH
854static int mailinfo(FILE *in, FILE *out, int ks, const char *encoding,
855 const char *msg, const char *patch)
34488e3c
LS
856{
857 keep_subject = ks;
858 metainfo_charset = encoding;
859 fin = in;
860 fout = out;
861
862 cmitmsg = fopen(msg, "w");
863 if (!cmitmsg) {
864 perror(msg);
865 return -1;
866 }
867 patchfile = fopen(patch, "w");
868 if (!patchfile) {
869 perror(patch);
870 fclose(cmitmsg);
871 return -1;
872 }
87ab7992
DZ
873
874 p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(char *));
875 s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(char *));
876
877 /* process the email header */
878 while (read_one_header_line(line, sizeof(line), fin))
86747c13 879 check_header(line, p_hdr_data, 1);
87ab7992
DZ
880
881 handle_body();
882 handle_info();
34488e3c
LS
883
884 return 0;
885}
886
6bff6a60 887static const char mailinfo_usage[] =
9f63892b 888 "git-mailinfo [-k] [-u | --encoding=<encoding>] msg patch <mail >info";
d4a9ce78 889
a633fca0 890int cmd_mailinfo(int argc, const char **argv, const char *prefix)
2744b234 891{
bb1091a4
JH
892 const char *def_charset;
893
f1f909e3
JH
894 /* NEEDSWORK: might want to do the optional .git/ directory
895 * discovery
896 */
897 git_config(git_default_config);
898
bb1091a4
JH
899 def_charset = (git_commit_encoding ? git_commit_encoding : "utf-8");
900 metainfo_charset = def_charset;
901
6bff6a60
JH
902 while (1 < argc && argv[1][0] == '-') {
903 if (!strcmp(argv[1], "-k"))
904 keep_subject = 1;
d4a9ce78 905 else if (!strcmp(argv[1], "-u"))
bb1091a4
JH
906 metainfo_charset = def_charset;
907 else if (!strcmp(argv[1], "-n"))
908 metainfo_charset = NULL;
cc44c765 909 else if (!prefixcmp(argv[1], "--encoding="))
9f63892b 910 metainfo_charset = argv[1] + 11;
d4a9ce78 911 else
f1f909e3 912 usage(mailinfo_usage);
6bff6a60
JH
913 argc--; argv++;
914 }
915
a196d8d4 916 if (argc != 3)
f1f909e3 917 usage(mailinfo_usage);
34488e3c
LS
918
919 return !!mailinfo(stdin, stdout, keep_subject, metainfo_charset, argv[1], argv[2]);
2744b234 920}