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Commit | Line | Data |
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1 | /* | |
2 | * Another stupid program, this one parsing the headers of an | |
3 | * email to figure out authorship and subject | |
4 | */ | |
5 | #define _GNU_SOURCE | |
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8 | #include <string.h> | |
9 | #include <ctype.h> | |
10 | #ifndef NO_ICONV | |
11 | #include <iconv.h> | |
12 | #endif | |
13 | #include "git-compat-util.h" | |
14 | #include "cache.h" | |
15 | #include "builtin.h" | |
16 | ||
17 | static FILE *cmitmsg, *patchfile, *fin, *fout; | |
18 | ||
19 | static int keep_subject; | |
20 | static const char *metainfo_charset; | |
21 | static char line[1000]; | |
22 | static char date[1000]; | |
23 | static char name[1000]; | |
24 | static char email[1000]; | |
25 | static char subject[1000]; | |
26 | ||
27 | static enum { | |
28 | TE_DONTCARE, TE_QP, TE_BASE64, | |
29 | } transfer_encoding; | |
30 | static char charset[256]; | |
31 | ||
32 | static char multipart_boundary[1000]; | |
33 | static int multipart_boundary_len; | |
34 | static int patch_lines; | |
35 | ||
36 | static char *sanity_check(char *name, char *email) | |
37 | { | |
38 | int len = strlen(name); | |
39 | if (len < 3 || len > 60) | |
40 | return email; | |
41 | if (strchr(name, '@') || strchr(name, '<') || strchr(name, '>')) | |
42 | return email; | |
43 | return name; | |
44 | } | |
45 | ||
46 | static int bogus_from(char *line) | |
47 | { | |
48 | /* John Doe <johndoe> */ | |
49 | char *bra, *ket, *dst, *cp; | |
50 | ||
51 | /* This is fallback, so do not bother if we already have an | |
52 | * e-mail address. | |
53 | */ | |
54 | if (*email) | |
55 | return 0; | |
56 | ||
57 | bra = strchr(line, '<'); | |
58 | if (!bra) | |
59 | return 0; | |
60 | ket = strchr(bra, '>'); | |
61 | if (!ket) | |
62 | return 0; | |
63 | ||
64 | for (dst = email, cp = bra+1; cp < ket; ) | |
65 | *dst++ = *cp++; | |
66 | *dst = 0; | |
67 | for (cp = line; isspace(*cp); cp++) | |
68 | ; | |
69 | for (bra--; isspace(*bra); bra--) | |
70 | *bra = 0; | |
71 | cp = sanity_check(cp, email); | |
72 | strcpy(name, cp); | |
73 | return 1; | |
74 | } | |
75 | ||
76 | static int handle_from(char *in_line) | |
77 | { | |
78 | char line[1000]; | |
79 | char *at; | |
80 | char *dst; | |
81 | ||
82 | strcpy(line, in_line); | |
83 | at = strchr(line, '@'); | |
84 | if (!at) | |
85 | return bogus_from(line); | |
86 | ||
87 | /* | |
88 | * If we already have one email, don't take any confusing lines | |
89 | */ | |
90 | if (*email && strchr(at+1, '@')) | |
91 | return 0; | |
92 | ||
93 | /* Pick up the string around '@', possibly delimited with <> | |
94 | * pair; that is the email part. White them out while copying. | |
95 | */ | |
96 | while (at > line) { | |
97 | char c = at[-1]; | |
98 | if (isspace(c)) | |
99 | break; | |
100 | if (c == '<') { | |
101 | at[-1] = ' '; | |
102 | break; | |
103 | } | |
104 | at--; | |
105 | } | |
106 | dst = email; | |
107 | for (;;) { | |
108 | unsigned char c = *at; | |
109 | if (!c || c == '>' || isspace(c)) { | |
110 | if (c == '>') | |
111 | *at = ' '; | |
112 | break; | |
113 | } | |
114 | *at++ = ' '; | |
115 | *dst++ = c; | |
116 | } | |
117 | *dst++ = 0; | |
118 | ||
119 | /* The remainder is name. It could be "John Doe <john.doe@xz>" | |
120 | * or "john.doe@xz (John Doe)", but we have whited out the | |
121 | * email part, so trim from both ends, possibly removing | |
122 | * the () pair at the end. | |
123 | */ | |
124 | at = line + strlen(line); | |
125 | while (at > line) { | |
126 | unsigned char c = *--at; | |
127 | if (!isspace(c)) { | |
128 | at[(c == ')') ? 0 : 1] = 0; | |
129 | break; | |
130 | } | |
131 | } | |
132 | ||
133 | at = line; | |
134 | for (;;) { | |
135 | unsigned char c = *at; | |
136 | if (!c || !isspace(c)) { | |
137 | if (c == '(') | |
138 | at++; | |
139 | break; | |
140 | } | |
141 | at++; | |
142 | } | |
143 | at = sanity_check(at, email); | |
144 | strcpy(name, at); | |
145 | return 1; | |
146 | } | |
147 | ||
148 | static int handle_date(char *line) | |
149 | { | |
150 | strcpy(date, line); | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int handle_subject(char *line) | |
155 | { | |
156 | strcpy(subject, line); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | /* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt | |
161 | * to have enough heuristics to grok MIME encoded patches often found | |
162 | * on our mailing lists. For example, we do not even treat header lines | |
163 | * case insensitively. | |
164 | */ | |
165 | ||
166 | static int slurp_attr(const char *line, const char *name, char *attr) | |
167 | { | |
168 | const char *ends, *ap = strcasestr(line, name); | |
169 | size_t sz; | |
170 | ||
171 | if (!ap) { | |
172 | *attr = 0; | |
173 | return 0; | |
174 | } | |
175 | ap += strlen(name); | |
176 | if (*ap == '"') { | |
177 | ap++; | |
178 | ends = "\""; | |
179 | } | |
180 | else | |
181 | ends = "; \t"; | |
182 | sz = strcspn(ap, ends); | |
183 | memcpy(attr, ap, sz); | |
184 | attr[sz] = 0; | |
185 | return 1; | |
186 | } | |
187 | ||
188 | static int handle_subcontent_type(char *line) | |
189 | { | |
190 | /* We do not want to mess with boundary. Note that we do not | |
191 | * handle nested multipart. | |
192 | */ | |
193 | if (strcasestr(line, "boundary=")) { | |
194 | fprintf(stderr, "Not handling nested multipart message.\n"); | |
195 | exit(1); | |
196 | } | |
197 | slurp_attr(line, "charset=", charset); | |
198 | if (*charset) { | |
199 | int i, c; | |
200 | for (i = 0; (c = charset[i]) != 0; i++) | |
201 | charset[i] = tolower(c); | |
202 | } | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static int handle_content_type(char *line) | |
207 | { | |
208 | *multipart_boundary = 0; | |
209 | if (slurp_attr(line, "boundary=", multipart_boundary + 2)) { | |
210 | memcpy(multipart_boundary, "--", 2); | |
211 | multipart_boundary_len = strlen(multipart_boundary); | |
212 | } | |
213 | slurp_attr(line, "charset=", charset); | |
214 | return 0; | |
215 | } | |
216 | ||
217 | static int handle_content_transfer_encoding(char *line) | |
218 | { | |
219 | if (strcasestr(line, "base64")) | |
220 | transfer_encoding = TE_BASE64; | |
221 | else if (strcasestr(line, "quoted-printable")) | |
222 | transfer_encoding = TE_QP; | |
223 | else | |
224 | transfer_encoding = TE_DONTCARE; | |
225 | return 0; | |
226 | } | |
227 | ||
228 | static int is_multipart_boundary(const char *line) | |
229 | { | |
230 | return (!memcmp(line, multipart_boundary, multipart_boundary_len)); | |
231 | } | |
232 | ||
233 | static int eatspace(char *line) | |
234 | { | |
235 | int len = strlen(line); | |
236 | while (len > 0 && isspace(line[len-1])) | |
237 | line[--len] = 0; | |
238 | return len; | |
239 | } | |
240 | ||
241 | #define SEEN_FROM 01 | |
242 | #define SEEN_DATE 02 | |
243 | #define SEEN_SUBJECT 04 | |
244 | #define SEEN_BOGUS_UNIX_FROM 010 | |
245 | #define SEEN_PREFIX 020 | |
246 | ||
247 | /* First lines of body can have From:, Date:, and Subject: or empty */ | |
248 | static void handle_inbody_header(int *seen, char *line) | |
249 | { | |
250 | if (*seen & SEEN_PREFIX) | |
251 | return; | |
252 | if (isspace(*line)) { | |
253 | char *cp; | |
254 | for (cp = line + 1; *cp; cp++) { | |
255 | if (!isspace(*cp)) | |
256 | break; | |
257 | } | |
258 | if (!*cp) | |
259 | return; | |
260 | } | |
261 | if (!memcmp(">From", line, 5) && isspace(line[5])) { | |
262 | if (!(*seen & SEEN_BOGUS_UNIX_FROM)) { | |
263 | *seen |= SEEN_BOGUS_UNIX_FROM; | |
264 | return; | |
265 | } | |
266 | } | |
267 | if (!memcmp("From:", line, 5) && isspace(line[5])) { | |
268 | if (!(*seen & SEEN_FROM) && handle_from(line+6)) { | |
269 | *seen |= SEEN_FROM; | |
270 | return; | |
271 | } | |
272 | } | |
273 | if (!memcmp("Date:", line, 5) && isspace(line[5])) { | |
274 | if (!(*seen & SEEN_DATE)) { | |
275 | handle_date(line+6); | |
276 | *seen |= SEEN_DATE; | |
277 | return; | |
278 | } | |
279 | } | |
280 | if (!memcmp("Subject:", line, 8) && isspace(line[8])) { | |
281 | if (!(*seen & SEEN_SUBJECT)) { | |
282 | handle_subject(line+9); | |
283 | *seen |= SEEN_SUBJECT; | |
284 | return; | |
285 | } | |
286 | } | |
287 | if (!memcmp("[PATCH]", line, 7) && isspace(line[7])) { | |
288 | if (!(*seen & SEEN_SUBJECT)) { | |
289 | handle_subject(line); | |
290 | *seen |= SEEN_SUBJECT; | |
291 | return; | |
292 | } | |
293 | } | |
294 | *seen |= SEEN_PREFIX; | |
295 | } | |
296 | ||
297 | static char *cleanup_subject(char *subject) | |
298 | { | |
299 | if (keep_subject) | |
300 | return subject; | |
301 | for (;;) { | |
302 | char *p; | |
303 | int len, remove; | |
304 | switch (*subject) { | |
305 | case 'r': case 'R': | |
306 | if (!memcmp("e:", subject+1, 2)) { | |
307 | subject +=3; | |
308 | continue; | |
309 | } | |
310 | break; | |
311 | case ' ': case '\t': case ':': | |
312 | subject++; | |
313 | continue; | |
314 | ||
315 | case '[': | |
316 | p = strchr(subject, ']'); | |
317 | if (!p) { | |
318 | subject++; | |
319 | continue; | |
320 | } | |
321 | len = strlen(p); | |
322 | remove = p - subject; | |
323 | if (remove <= len *2) { | |
324 | subject = p+1; | |
325 | continue; | |
326 | } | |
327 | break; | |
328 | } | |
329 | eatspace(subject); | |
330 | return subject; | |
331 | } | |
332 | } | |
333 | ||
334 | static void cleanup_space(char *buf) | |
335 | { | |
336 | unsigned char c; | |
337 | while ((c = *buf) != 0) { | |
338 | buf++; | |
339 | if (isspace(c)) { | |
340 | buf[-1] = ' '; | |
341 | c = *buf; | |
342 | while (isspace(c)) { | |
343 | int len = strlen(buf); | |
344 | memmove(buf, buf+1, len); | |
345 | c = *buf; | |
346 | } | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | static void decode_header(char *it); | |
352 | typedef int (*header_fn_t)(char *); | |
353 | struct header_def { | |
354 | const char *name; | |
355 | header_fn_t func; | |
356 | int namelen; | |
357 | }; | |
358 | ||
359 | static void check_header(char *line, struct header_def *header) | |
360 | { | |
361 | int i; | |
362 | ||
363 | if (header[0].namelen <= 0) { | |
364 | for (i = 0; header[i].name; i++) | |
365 | header[i].namelen = strlen(header[i].name); | |
366 | } | |
367 | for (i = 0; header[i].name; i++) { | |
368 | int len = header[i].namelen; | |
369 | if (!strncasecmp(line, header[i].name, len) && | |
370 | line[len] == ':' && isspace(line[len + 1])) { | |
371 | /* Unwrap inline B and Q encoding, and optionally | |
372 | * normalize the meta information to utf8. | |
373 | */ | |
374 | decode_header(line + len + 2); | |
375 | header[i].func(line + len + 2); | |
376 | break; | |
377 | } | |
378 | } | |
379 | } | |
380 | ||
381 | static void check_subheader_line(char *line) | |
382 | { | |
383 | static struct header_def header[] = { | |
384 | { "Content-Type", handle_subcontent_type }, | |
385 | { "Content-Transfer-Encoding", | |
386 | handle_content_transfer_encoding }, | |
387 | { NULL }, | |
388 | }; | |
389 | check_header(line, header); | |
390 | } | |
391 | static void check_header_line(char *line) | |
392 | { | |
393 | static struct header_def header[] = { | |
394 | { "From", handle_from }, | |
395 | { "Date", handle_date }, | |
396 | { "Subject", handle_subject }, | |
397 | { "Content-Type", handle_content_type }, | |
398 | { "Content-Transfer-Encoding", | |
399 | handle_content_transfer_encoding }, | |
400 | { NULL }, | |
401 | }; | |
402 | check_header(line, header); | |
403 | } | |
404 | ||
405 | static int is_rfc2822_header(char *line) | |
406 | { | |
407 | /* | |
408 | * The section that defines the loosest possible | |
409 | * field name is "3.6.8 Optional fields". | |
410 | * | |
411 | * optional-field = field-name ":" unstructured CRLF | |
412 | * field-name = 1*ftext | |
413 | * ftext = %d33-57 / %59-126 | |
414 | */ | |
415 | int ch; | |
416 | char *cp = line; | |
417 | while ((ch = *cp++)) { | |
418 | if (ch == ':') | |
419 | return cp != line; | |
420 | if ((33 <= ch && ch <= 57) || | |
421 | (59 <= ch && ch <= 126)) | |
422 | continue; | |
423 | break; | |
424 | } | |
425 | return 0; | |
426 | } | |
427 | ||
428 | static int read_one_header_line(char *line, int sz, FILE *in) | |
429 | { | |
430 | int ofs = 0; | |
431 | while (ofs < sz) { | |
432 | int peek, len; | |
433 | if (fgets(line + ofs, sz - ofs, in) == NULL) | |
434 | break; | |
435 | len = eatspace(line + ofs); | |
436 | if ((len == 0) || !is_rfc2822_header(line)) { | |
437 | /* Re-add the newline */ | |
438 | line[ofs + len] = '\n'; | |
439 | line[ofs + len + 1] = '\0'; | |
440 | break; | |
441 | } | |
442 | ofs += len; | |
443 | /* Yuck, 2822 header "folding" */ | |
444 | peek = fgetc(in); ungetc(peek, in); | |
445 | if (peek != ' ' && peek != '\t') | |
446 | break; | |
447 | } | |
448 | /* Count mbox From headers as headers */ | |
449 | if (!ofs && (!memcmp(line, "From ", 5) || !memcmp(line, ">From ", 6))) | |
450 | ofs = 1; | |
451 | return ofs; | |
452 | } | |
453 | ||
454 | static int decode_q_segment(char *in, char *ot, char *ep, int rfc2047) | |
455 | { | |
456 | int c; | |
457 | while ((c = *in++) != 0 && (in <= ep)) { | |
458 | if (c == '=') { | |
459 | int d = *in++; | |
460 | if (d == '\n' || !d) | |
461 | break; /* drop trailing newline */ | |
462 | *ot++ = ((hexval(d) << 4) | hexval(*in++)); | |
463 | continue; | |
464 | } | |
465 | if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */ | |
466 | c = 0x20; | |
467 | *ot++ = c; | |
468 | } | |
469 | *ot = 0; | |
470 | return 0; | |
471 | } | |
472 | ||
473 | static int decode_b_segment(char *in, char *ot, char *ep) | |
474 | { | |
475 | /* Decode in..ep, possibly in-place to ot */ | |
476 | int c, pos = 0, acc = 0; | |
477 | ||
478 | while ((c = *in++) != 0 && (in <= ep)) { | |
479 | if (c == '+') | |
480 | c = 62; | |
481 | else if (c == '/') | |
482 | c = 63; | |
483 | else if ('A' <= c && c <= 'Z') | |
484 | c -= 'A'; | |
485 | else if ('a' <= c && c <= 'z') | |
486 | c -= 'a' - 26; | |
487 | else if ('0' <= c && c <= '9') | |
488 | c -= '0' - 52; | |
489 | else if (c == '=') { | |
490 | /* padding is almost like (c == 0), except we do | |
491 | * not output NUL resulting only from it; | |
492 | * for now we just trust the data. | |
493 | */ | |
494 | c = 0; | |
495 | } | |
496 | else | |
497 | continue; /* garbage */ | |
498 | switch (pos++) { | |
499 | case 0: | |
500 | acc = (c << 2); | |
501 | break; | |
502 | case 1: | |
503 | *ot++ = (acc | (c >> 4)); | |
504 | acc = (c & 15) << 4; | |
505 | break; | |
506 | case 2: | |
507 | *ot++ = (acc | (c >> 2)); | |
508 | acc = (c & 3) << 6; | |
509 | break; | |
510 | case 3: | |
511 | *ot++ = (acc | c); | |
512 | acc = pos = 0; | |
513 | break; | |
514 | } | |
515 | } | |
516 | *ot = 0; | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static void convert_to_utf8(char *line, char *charset) | |
521 | { | |
522 | #ifndef NO_ICONV | |
523 | char *in, *out; | |
524 | size_t insize, outsize, nrc; | |
525 | char outbuf[4096]; /* cheat */ | |
526 | static char latin_one[] = "latin1"; | |
527 | char *input_charset = *charset ? charset : latin_one; | |
528 | iconv_t conv = iconv_open(metainfo_charset, input_charset); | |
529 | ||
530 | if (conv == (iconv_t) -1) { | |
531 | static int warned_latin1_once = 0; | |
532 | if (input_charset != latin_one) { | |
533 | fprintf(stderr, "cannot convert from %s to %s\n", | |
534 | input_charset, metainfo_charset); | |
535 | *charset = 0; | |
536 | } | |
537 | else if (!warned_latin1_once) { | |
538 | warned_latin1_once = 1; | |
539 | fprintf(stderr, "tried to convert from %s to %s, " | |
540 | "but your iconv does not work with it.\n", | |
541 | input_charset, metainfo_charset); | |
542 | } | |
543 | return; | |
544 | } | |
545 | in = line; | |
546 | insize = strlen(in); | |
547 | out = outbuf; | |
548 | outsize = sizeof(outbuf); | |
549 | nrc = iconv(conv, &in, &insize, &out, &outsize); | |
550 | iconv_close(conv); | |
551 | if (nrc == (size_t) -1) | |
552 | return; | |
553 | *out = 0; | |
554 | strcpy(line, outbuf); | |
555 | #endif | |
556 | } | |
557 | ||
558 | static int decode_header_bq(char *it) | |
559 | { | |
560 | char *in, *out, *ep, *cp, *sp; | |
561 | char outbuf[1000]; | |
562 | int rfc2047 = 0; | |
563 | ||
564 | in = it; | |
565 | out = outbuf; | |
566 | while ((ep = strstr(in, "=?")) != NULL) { | |
567 | int sz, encoding; | |
568 | char charset_q[256], piecebuf[256]; | |
569 | rfc2047 = 1; | |
570 | ||
571 | if (in != ep) { | |
572 | sz = ep - in; | |
573 | memcpy(out, in, sz); | |
574 | out += sz; | |
575 | in += sz; | |
576 | } | |
577 | /* E.g. | |
578 | * ep : "=?iso-2022-jp?B?GyR...?= foo" | |
579 | * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz" | |
580 | */ | |
581 | ep += 2; | |
582 | cp = strchr(ep, '?'); | |
583 | if (!cp) | |
584 | return rfc2047; /* no munging */ | |
585 | for (sp = ep; sp < cp; sp++) | |
586 | charset_q[sp - ep] = tolower(*sp); | |
587 | charset_q[cp - ep] = 0; | |
588 | encoding = cp[1]; | |
589 | if (!encoding || cp[2] != '?') | |
590 | return rfc2047; /* no munging */ | |
591 | ep = strstr(cp + 3, "?="); | |
592 | if (!ep) | |
593 | return rfc2047; /* no munging */ | |
594 | switch (tolower(encoding)) { | |
595 | default: | |
596 | return rfc2047; /* no munging */ | |
597 | case 'b': | |
598 | sz = decode_b_segment(cp + 3, piecebuf, ep); | |
599 | break; | |
600 | case 'q': | |
601 | sz = decode_q_segment(cp + 3, piecebuf, ep, 1); | |
602 | break; | |
603 | } | |
604 | if (sz < 0) | |
605 | return rfc2047; | |
606 | if (metainfo_charset) | |
607 | convert_to_utf8(piecebuf, charset_q); | |
608 | strcpy(out, piecebuf); | |
609 | out += strlen(out); | |
610 | in = ep + 2; | |
611 | } | |
612 | strcpy(out, in); | |
613 | strcpy(it, outbuf); | |
614 | return rfc2047; | |
615 | } | |
616 | ||
617 | static void decode_header(char *it) | |
618 | { | |
619 | ||
620 | if (decode_header_bq(it)) | |
621 | return; | |
622 | /* otherwise "it" is a straight copy of the input. | |
623 | * This can be binary guck but there is no charset specified. | |
624 | */ | |
625 | if (metainfo_charset) | |
626 | convert_to_utf8(it, ""); | |
627 | } | |
628 | ||
629 | static void decode_transfer_encoding(char *line) | |
630 | { | |
631 | char *ep; | |
632 | ||
633 | switch (transfer_encoding) { | |
634 | case TE_QP: | |
635 | ep = line + strlen(line); | |
636 | decode_q_segment(line, line, ep, 0); | |
637 | break; | |
638 | case TE_BASE64: | |
639 | ep = line + strlen(line); | |
640 | decode_b_segment(line, line, ep); | |
641 | break; | |
642 | case TE_DONTCARE: | |
643 | break; | |
644 | } | |
645 | } | |
646 | ||
647 | static void handle_info(void) | |
648 | { | |
649 | char *sub; | |
650 | ||
651 | sub = cleanup_subject(subject); | |
652 | cleanup_space(name); | |
653 | cleanup_space(date); | |
654 | cleanup_space(email); | |
655 | cleanup_space(sub); | |
656 | ||
657 | fprintf(fout, "Author: %s\nEmail: %s\nSubject: %s\nDate: %s\n\n", | |
658 | name, email, sub, date); | |
659 | } | |
660 | ||
661 | /* We are inside message body and have read line[] already. | |
662 | * Spit out the commit log. | |
663 | */ | |
664 | static int handle_commit_msg(int *seen) | |
665 | { | |
666 | if (!cmitmsg) | |
667 | return 0; | |
668 | do { | |
669 | if (!memcmp("diff -", line, 6) || | |
670 | !memcmp("---", line, 3) || | |
671 | !memcmp("Index: ", line, 7)) | |
672 | break; | |
673 | if ((multipart_boundary[0] && is_multipart_boundary(line))) { | |
674 | /* We come here when the first part had only | |
675 | * the commit message without any patch. We | |
676 | * pretend we have not seen this line yet, and | |
677 | * go back to the loop. | |
678 | */ | |
679 | return 1; | |
680 | } | |
681 | ||
682 | /* Unwrap transfer encoding and optionally | |
683 | * normalize the log message to UTF-8. | |
684 | */ | |
685 | decode_transfer_encoding(line); | |
686 | if (metainfo_charset) | |
687 | convert_to_utf8(line, charset); | |
688 | ||
689 | handle_inbody_header(seen, line); | |
690 | if (!(*seen & SEEN_PREFIX)) | |
691 | continue; | |
692 | ||
693 | fputs(line, cmitmsg); | |
694 | } while (fgets(line, sizeof(line), fin) != NULL); | |
695 | fclose(cmitmsg); | |
696 | cmitmsg = NULL; | |
697 | return 0; | |
698 | } | |
699 | ||
700 | /* We have done the commit message and have the first | |
701 | * line of the patch in line[]. | |
702 | */ | |
703 | static void handle_patch(void) | |
704 | { | |
705 | do { | |
706 | if (multipart_boundary[0] && is_multipart_boundary(line)) | |
707 | break; | |
708 | /* Only unwrap transfer encoding but otherwise do not | |
709 | * do anything. We do *NOT* want UTF-8 conversion | |
710 | * here; we are dealing with the user payload. | |
711 | */ | |
712 | decode_transfer_encoding(line); | |
713 | fputs(line, patchfile); | |
714 | patch_lines++; | |
715 | } while (fgets(line, sizeof(line), fin) != NULL); | |
716 | } | |
717 | ||
718 | /* multipart boundary and transfer encoding are set up for us, and we | |
719 | * are at the end of the sub header. do equivalent of handle_body up | |
720 | * to the next boundary without closing patchfile --- we will expect | |
721 | * that the first part to contain commit message and a patch, and | |
722 | * handle other parts as pure patches. | |
723 | */ | |
724 | static int handle_multipart_one_part(int *seen) | |
725 | { | |
726 | int n = 0; | |
727 | ||
728 | while (fgets(line, sizeof(line), fin) != NULL) { | |
729 | again: | |
730 | n++; | |
731 | if (is_multipart_boundary(line)) | |
732 | break; | |
733 | if (handle_commit_msg(seen)) | |
734 | goto again; | |
735 | handle_patch(); | |
736 | break; | |
737 | } | |
738 | if (n == 0) | |
739 | return -1; | |
740 | return 0; | |
741 | } | |
742 | ||
743 | static void handle_multipart_body(void) | |
744 | { | |
745 | int seen = 0; | |
746 | int part_num = 0; | |
747 | ||
748 | /* Skip up to the first boundary */ | |
749 | while (fgets(line, sizeof(line), fin) != NULL) | |
750 | if (is_multipart_boundary(line)) { | |
751 | part_num = 1; | |
752 | break; | |
753 | } | |
754 | if (!part_num) | |
755 | return; | |
756 | /* We are on boundary line. Start slurping the subhead. */ | |
757 | while (1) { | |
758 | int hdr = read_one_header_line(line, sizeof(line), fin); | |
759 | if (!hdr) { | |
760 | if (handle_multipart_one_part(&seen) < 0) | |
761 | return; | |
762 | /* Reset per part headers */ | |
763 | transfer_encoding = TE_DONTCARE; | |
764 | charset[0] = 0; | |
765 | } | |
766 | else | |
767 | check_subheader_line(line); | |
768 | } | |
769 | fclose(patchfile); | |
770 | if (!patch_lines) { | |
771 | fprintf(stderr, "No patch found\n"); | |
772 | exit(1); | |
773 | } | |
774 | } | |
775 | ||
776 | /* Non multipart message */ | |
777 | static void handle_body(void) | |
778 | { | |
779 | int seen = 0; | |
780 | ||
781 | handle_commit_msg(&seen); | |
782 | handle_patch(); | |
783 | fclose(patchfile); | |
784 | if (!patch_lines) { | |
785 | fprintf(stderr, "No patch found\n"); | |
786 | exit(1); | |
787 | } | |
788 | } | |
789 | ||
790 | int mailinfo(FILE *in, FILE *out, int ks, const char *encoding, | |
791 | const char *msg, const char *patch) | |
792 | { | |
793 | keep_subject = ks; | |
794 | metainfo_charset = encoding; | |
795 | fin = in; | |
796 | fout = out; | |
797 | ||
798 | cmitmsg = fopen(msg, "w"); | |
799 | if (!cmitmsg) { | |
800 | perror(msg); | |
801 | return -1; | |
802 | } | |
803 | patchfile = fopen(patch, "w"); | |
804 | if (!patchfile) { | |
805 | perror(patch); | |
806 | fclose(cmitmsg); | |
807 | return -1; | |
808 | } | |
809 | while (1) { | |
810 | int hdr = read_one_header_line(line, sizeof(line), fin); | |
811 | if (!hdr) { | |
812 | if (multipart_boundary[0]) | |
813 | handle_multipart_body(); | |
814 | else | |
815 | handle_body(); | |
816 | handle_info(); | |
817 | break; | |
818 | } | |
819 | check_header_line(line); | |
820 | } | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static const char mailinfo_usage[] = | |
826 | "git-mailinfo [-k] [-u | --encoding=<encoding>] msg patch <mail >info"; | |
827 | ||
828 | int cmd_mailinfo(int argc, const char **argv, const char *prefix) | |
829 | { | |
830 | /* NEEDSWORK: might want to do the optional .git/ directory | |
831 | * discovery | |
832 | */ | |
833 | git_config(git_default_config); | |
834 | ||
835 | while (1 < argc && argv[1][0] == '-') { | |
836 | if (!strcmp(argv[1], "-k")) | |
837 | keep_subject = 1; | |
838 | else if (!strcmp(argv[1], "-u")) | |
839 | metainfo_charset = git_commit_encoding; | |
840 | else if (!strncmp(argv[1], "--encoding=", 11)) | |
841 | metainfo_charset = argv[1] + 11; | |
842 | else | |
843 | usage(mailinfo_usage); | |
844 | argc--; argv++; | |
845 | } | |
846 | ||
847 | if (argc != 3) | |
848 | usage(mailinfo_usage); | |
849 | ||
850 | return !!mailinfo(stdin, stdout, keep_subject, metainfo_charset, argv[1], argv[2]); | |
851 | } |