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Commit | Line | Data |
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a33e0b2a | 1 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
6c510bee | 2 | #include "cache.h" |
b2141fc1 | 3 | #include "config.h" |
cbd53a21 | 4 | #include "object-store.h" |
35ebfd6a | 5 | #include "attr.h" |
3fed15f5 | 6 | #include "run-command.h" |
a2b665de | 7 | #include "quote.h" |
6424c2ad | 8 | #include "sigchain.h" |
edcc8581 | 9 | #include "pkt-line.h" |
99605d62 | 10 | #include "sub-process.h" |
107642fe | 11 | #include "utf8.h" |
35ebfd6a | 12 | |
6c510bee LT |
13 | /* |
14 | * convert.c - convert a file when checking it out and checking it in. | |
15 | * | |
16 | * This should use the pathname to decide on whether it wants to do some | |
17 | * more interesting conversions (automatic gzip/unzip, general format | |
18 | * conversions etc etc), but by default it just does automatic CRLF<->LF | |
942e7747 | 19 | * translation when the "text" attribute or "auto_crlf" option is set. |
6c510bee LT |
20 | */ |
21 | ||
a7630bd4 TB |
22 | /* Stat bits: When BIN is set, the txt bits are unset */ |
23 | #define CONVERT_STAT_BITS_TXT_LF 0x1 | |
24 | #define CONVERT_STAT_BITS_TXT_CRLF 0x2 | |
25 | #define CONVERT_STAT_BITS_BIN 0x4 | |
26 | ||
c61dcff9 | 27 | enum crlf_action { |
df747b81 TB |
28 | CRLF_UNDEFINED, |
29 | CRLF_BINARY, | |
fd6cce9e | 30 | CRLF_TEXT, |
df747b81 TB |
31 | CRLF_TEXT_INPUT, |
32 | CRLF_TEXT_CRLF, | |
33 | CRLF_AUTO, | |
34 | CRLF_AUTO_INPUT, | |
35 | CRLF_AUTO_CRLF | |
fd6cce9e | 36 | }; |
163b9591 | 37 | |
6c510bee | 38 | struct text_stat { |
28624193 | 39 | /* NUL, CR, LF and CRLF counts */ |
6e336a53 | 40 | unsigned nul, lonecr, lonelf, crlf; |
6c510bee LT |
41 | |
42 | /* These are just approximations! */ | |
43 | unsigned printable, nonprintable; | |
44 | }; | |
45 | ||
46 | static void gather_stats(const char *buf, unsigned long size, struct text_stat *stats) | |
47 | { | |
48 | unsigned long i; | |
49 | ||
50 | memset(stats, 0, sizeof(*stats)); | |
51 | ||
52 | for (i = 0; i < size; i++) { | |
53 | unsigned char c = buf[i]; | |
54 | if (c == '\r') { | |
6e336a53 | 55 | if (i+1 < size && buf[i+1] == '\n') { |
6c510bee | 56 | stats->crlf++; |
6e336a53 TB |
57 | i++; |
58 | } else | |
59 | stats->lonecr++; | |
6c510bee LT |
60 | continue; |
61 | } | |
62 | if (c == '\n') { | |
6e336a53 | 63 | stats->lonelf++; |
6c510bee LT |
64 | continue; |
65 | } | |
66 | if (c == 127) | |
67 | /* DEL */ | |
68 | stats->nonprintable++; | |
69 | else if (c < 32) { | |
70 | switch (c) { | |
71 | /* BS, HT, ESC and FF */ | |
72 | case '\b': case '\t': case '\033': case '\014': | |
73 | stats->printable++; | |
74 | break; | |
28624193 DP |
75 | case 0: |
76 | stats->nul++; | |
77 | /* fall through */ | |
6c510bee LT |
78 | default: |
79 | stats->nonprintable++; | |
80 | } | |
81 | } | |
82 | else | |
83 | stats->printable++; | |
84 | } | |
f9dd4bf4 DK |
85 | |
86 | /* If file ends with EOF then don't count this EOF as non-printable. */ | |
87 | if (size >= 1 && buf[size-1] == '\032') | |
88 | stats->nonprintable--; | |
6c510bee LT |
89 | } |
90 | ||
91 | /* | |
92 | * The same heuristics as diff.c::mmfile_is_binary() | |
a7630bd4 | 93 | * We treat files with bare CR as binary |
6c510bee | 94 | */ |
a7630bd4 | 95 | static int convert_is_binary(unsigned long size, const struct text_stat *stats) |
6c510bee | 96 | { |
6e336a53 | 97 | if (stats->lonecr) |
a7630bd4 | 98 | return 1; |
28624193 DP |
99 | if (stats->nul) |
100 | return 1; | |
6c510bee LT |
101 | if ((stats->printable >> 7) < stats->nonprintable) |
102 | return 1; | |
6c510bee LT |
103 | return 0; |
104 | } | |
105 | ||
a7630bd4 TB |
106 | static unsigned int gather_convert_stats(const char *data, unsigned long size) |
107 | { | |
108 | struct text_stat stats; | |
6e336a53 | 109 | int ret = 0; |
a7630bd4 TB |
110 | if (!data || !size) |
111 | return 0; | |
112 | gather_stats(data, size, &stats); | |
113 | if (convert_is_binary(size, &stats)) | |
6e336a53 TB |
114 | ret |= CONVERT_STAT_BITS_BIN; |
115 | if (stats.crlf) | |
116 | ret |= CONVERT_STAT_BITS_TXT_CRLF; | |
117 | if (stats.lonelf) | |
118 | ret |= CONVERT_STAT_BITS_TXT_LF; | |
119 | ||
120 | return ret; | |
a7630bd4 TB |
121 | } |
122 | ||
123 | static const char *gather_convert_stats_ascii(const char *data, unsigned long size) | |
124 | { | |
125 | unsigned int convert_stats = gather_convert_stats(data, size); | |
126 | ||
127 | if (convert_stats & CONVERT_STAT_BITS_BIN) | |
128 | return "-text"; | |
129 | switch (convert_stats) { | |
130 | case CONVERT_STAT_BITS_TXT_LF: | |
131 | return "lf"; | |
132 | case CONVERT_STAT_BITS_TXT_CRLF: | |
133 | return "crlf"; | |
134 | case CONVERT_STAT_BITS_TXT_LF | CONVERT_STAT_BITS_TXT_CRLF: | |
135 | return "mixed"; | |
136 | default: | |
137 | return "none"; | |
138 | } | |
139 | } | |
140 | ||
a7609c54 BW |
141 | const char *get_cached_convert_stats_ascii(const struct index_state *istate, |
142 | const char *path) | |
a7630bd4 TB |
143 | { |
144 | const char *ret; | |
145 | unsigned long sz; | |
a7609c54 | 146 | void *data = read_blob_data_from_index(istate, path, &sz); |
a7630bd4 TB |
147 | ret = gather_convert_stats_ascii(data, sz); |
148 | free(data); | |
149 | return ret; | |
150 | } | |
151 | ||
152 | const char *get_wt_convert_stats_ascii(const char *path) | |
153 | { | |
154 | const char *ret = ""; | |
155 | struct strbuf sb = STRBUF_INIT; | |
156 | if (strbuf_read_file(&sb, path, 0) >= 0) | |
157 | ret = gather_convert_stats_ascii(sb.buf, sb.len); | |
158 | strbuf_release(&sb); | |
159 | return ret; | |
160 | } | |
161 | ||
4b4024f5 TB |
162 | static int text_eol_is_crlf(void) |
163 | { | |
164 | if (auto_crlf == AUTO_CRLF_TRUE) | |
165 | return 1; | |
166 | else if (auto_crlf == AUTO_CRLF_INPUT) | |
167 | return 0; | |
168 | if (core_eol == EOL_CRLF) | |
169 | return 1; | |
170 | if (core_eol == EOL_UNSET && EOL_NATIVE == EOL_CRLF) | |
171 | return 1; | |
172 | return 0; | |
173 | } | |
174 | ||
c61dcff9 | 175 | static enum eol output_eol(enum crlf_action crlf_action) |
f217f0e8 | 176 | { |
c61dcff9 | 177 | switch (crlf_action) { |
942e7747 EB |
178 | case CRLF_BINARY: |
179 | return EOL_UNSET; | |
df747b81 | 180 | case CRLF_TEXT_CRLF: |
942e7747 | 181 | return EOL_CRLF; |
df747b81 | 182 | case CRLF_TEXT_INPUT: |
942e7747 | 183 | return EOL_LF; |
df747b81 TB |
184 | case CRLF_UNDEFINED: |
185 | case CRLF_AUTO_CRLF: | |
65237284 | 186 | return EOL_CRLF; |
df747b81 | 187 | case CRLF_AUTO_INPUT: |
65237284 | 188 | return EOL_LF; |
942e7747 EB |
189 | case CRLF_TEXT: |
190 | case CRLF_AUTO: | |
df747b81 | 191 | /* fall through */ |
4b4024f5 | 192 | return text_eol_is_crlf() ? EOL_CRLF : EOL_LF; |
942e7747 | 193 | } |
df747b81 | 194 | warning("Illegal crlf_action %d\n", (int)crlf_action); |
ec70f52f | 195 | return core_eol; |
942e7747 EB |
196 | } |
197 | ||
8462ff43 | 198 | static void check_global_conv_flags_eol(const char *path, enum crlf_action crlf_action, |
a0ad53c1 | 199 | struct text_stat *old_stats, struct text_stat *new_stats, |
8462ff43 | 200 | int conv_flags) |
21e5ad50 | 201 | { |
a0ad53c1 | 202 | if (old_stats->crlf && !new_stats->crlf ) { |
21e5ad50 | 203 | /* |
a0ad53c1 | 204 | * CRLFs would not be restored by checkout |
21e5ad50 | 205 | */ |
8462ff43 TB |
206 | if (conv_flags & CONV_EOL_RNDTRP_DIE) |
207 | die(_("CRLF would be replaced by LF in %s."), path); | |
208 | else if (conv_flags & CONV_EOL_RNDTRP_WARN) | |
87cb7845 VA |
209 | warning(_("CRLF will be replaced by LF in %s.\n" |
210 | "The file will have its original line" | |
211 | " endings in your working directory."), path); | |
a0ad53c1 | 212 | } else if (old_stats->lonelf && !new_stats->lonelf ) { |
21e5ad50 | 213 | /* |
a0ad53c1 | 214 | * CRLFs would be added by checkout |
21e5ad50 | 215 | */ |
8462ff43 TB |
216 | if (conv_flags & CONV_EOL_RNDTRP_DIE) |
217 | die(_("LF would be replaced by CRLF in %s"), path); | |
218 | else if (conv_flags & CONV_EOL_RNDTRP_WARN) | |
87cb7845 VA |
219 | warning(_("LF will be replaced by CRLF in %s.\n" |
220 | "The file will have its original line" | |
221 | " endings in your working directory."), path); | |
21e5ad50 SP |
222 | } |
223 | } | |
224 | ||
86ff70a0 | 225 | static int has_crlf_in_index(const struct index_state *istate, const char *path) |
c4805393 | 226 | { |
c4805393 | 227 | unsigned long sz; |
c4805393 | 228 | void *data; |
86ff70a0 TB |
229 | const char *crp; |
230 | int has_crlf = 0; | |
c4805393 | 231 | |
49a6d31f | 232 | data = read_blob_data_from_index(istate, path, &sz); |
4982fd78 | 233 | if (!data) |
c4805393 | 234 | return 0; |
86ff70a0 TB |
235 | |
236 | crp = memchr(data, '\r', sz); | |
237 | if (crp) { | |
238 | unsigned int ret_stats; | |
239 | ret_stats = gather_convert_stats(data, sz); | |
240 | if (!(ret_stats & CONVERT_STAT_BITS_BIN) && | |
241 | (ret_stats & CONVERT_STAT_BITS_TXT_CRLF)) | |
242 | has_crlf = 1; | |
243 | } | |
c4805393 | 244 | free(data); |
86ff70a0 | 245 | return has_crlf; |
c4805393 FAG |
246 | } |
247 | ||
a0ad53c1 TB |
248 | static int will_convert_lf_to_crlf(size_t len, struct text_stat *stats, |
249 | enum crlf_action crlf_action) | |
250 | { | |
251 | if (output_eol(crlf_action) != EOL_CRLF) | |
252 | return 0; | |
253 | /* No "naked" LF? Nothing to convert, regardless. */ | |
254 | if (!stats->lonelf) | |
255 | return 0; | |
256 | ||
257 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { | |
258 | /* If we have any CR or CRLF line endings, we do not touch it */ | |
259 | /* This is the new safer autocrlf-handling */ | |
260 | if (stats->lonecr || stats->crlf) | |
261 | return 0; | |
262 | ||
263 | if (convert_is_binary(len, stats)) | |
264 | return 0; | |
265 | } | |
266 | return 1; | |
267 | ||
268 | } | |
269 | ||
7a17918c LS |
270 | static int validate_encoding(const char *path, const char *enc, |
271 | const char *data, size_t len, int die_on_error) | |
272 | { | |
273 | /* We only check for UTF here as UTF?? can be an alias for UTF-?? */ | |
274 | if (istarts_with(enc, "UTF")) { | |
275 | /* | |
276 | * Check for detectable errors in UTF encodings | |
277 | */ | |
278 | if (has_prohibited_utf_bom(enc, data, len)) { | |
279 | const char *error_msg = _( | |
280 | "BOM is prohibited in '%s' if encoded as %s"); | |
281 | /* | |
282 | * This advice is shown for UTF-??BE and UTF-??LE encodings. | |
283 | * We cut off the last two characters of the encoding name | |
284 | * to generate the encoding name suitable for BOMs. | |
285 | */ | |
286 | const char *advise_msg = _( | |
287 | "The file '%s' contains a byte order " | |
288 | "mark (BOM). Please use UTF-%s as " | |
289 | "working-tree-encoding."); | |
290 | const char *stripped = NULL; | |
291 | char *upper = xstrdup_toupper(enc); | |
292 | upper[strlen(upper)-2] = '\0'; | |
293 | if (!skip_prefix(upper, "UTF-", &stripped)) | |
294 | skip_prefix(stripped, "UTF", &stripped); | |
295 | advise(advise_msg, path, stripped); | |
296 | free(upper); | |
297 | if (die_on_error) | |
298 | die(error_msg, path, enc); | |
299 | else { | |
300 | return error(error_msg, path, enc); | |
301 | } | |
302 | ||
303 | } else if (is_missing_required_utf_bom(enc, data, len)) { | |
304 | const char *error_msg = _( | |
305 | "BOM is required in '%s' if encoded as %s"); | |
306 | const char *advise_msg = _( | |
307 | "The file '%s' is missing a byte order " | |
308 | "mark (BOM). Please use UTF-%sBE or UTF-%sLE " | |
309 | "(depending on the byte order) as " | |
310 | "working-tree-encoding."); | |
311 | const char *stripped = NULL; | |
312 | char *upper = xstrdup_toupper(enc); | |
313 | if (!skip_prefix(upper, "UTF-", &stripped)) | |
314 | skip_prefix(stripped, "UTF", &stripped); | |
315 | advise(advise_msg, path, stripped, stripped); | |
316 | free(upper); | |
317 | if (die_on_error) | |
318 | die(error_msg, path, enc); | |
319 | else { | |
320 | return error(error_msg, path, enc); | |
321 | } | |
322 | } | |
323 | ||
324 | } | |
325 | return 0; | |
326 | } | |
327 | ||
541d059c LS |
328 | static void trace_encoding(const char *context, const char *path, |
329 | const char *encoding, const char *buf, size_t len) | |
330 | { | |
331 | static struct trace_key coe = TRACE_KEY_INIT(WORKING_TREE_ENCODING); | |
332 | struct strbuf trace = STRBUF_INIT; | |
333 | int i; | |
334 | ||
335 | strbuf_addf(&trace, "%s (%s, considered %s):\n", context, path, encoding); | |
336 | for (i = 0; i < len && buf; ++i) { | |
337 | strbuf_addf( | |
338 | &trace,"| \e[2m%2i:\e[0m %2x \e[2m%c\e[0m%c", | |
339 | i, | |
340 | (unsigned char) buf[i], | |
341 | (buf[i] > 32 && buf[i] < 127 ? buf[i] : ' '), | |
342 | ((i+1) % 8 && (i+1) < len ? ' ' : '\n') | |
343 | ); | |
344 | } | |
345 | strbuf_addchars(&trace, '\n', 1); | |
346 | ||
347 | trace_strbuf(&coe, &trace); | |
348 | strbuf_release(&trace); | |
349 | } | |
350 | ||
e92d6225 LS |
351 | static int check_roundtrip(const char *enc_name) |
352 | { | |
353 | /* | |
354 | * check_roundtrip_encoding contains a string of comma and/or | |
355 | * space separated encodings (eg. "UTF-16, ASCII, CP1125"). | |
356 | * Search for the given encoding in that string. | |
357 | */ | |
358 | const char *found = strcasestr(check_roundtrip_encoding, enc_name); | |
359 | const char *next; | |
360 | int len; | |
361 | if (!found) | |
362 | return 0; | |
363 | next = found + strlen(enc_name); | |
364 | len = strlen(check_roundtrip_encoding); | |
365 | return (found && ( | |
366 | /* | |
367 | * check that the found encoding is at the | |
368 | * beginning of check_roundtrip_encoding or | |
369 | * that it is prefixed with a space or comma | |
370 | */ | |
371 | found == check_roundtrip_encoding || ( | |
372 | (isspace(found[-1]) || found[-1] == ',') | |
373 | ) | |
374 | ) && ( | |
375 | /* | |
376 | * check that the found encoding is at the | |
377 | * end of check_roundtrip_encoding or | |
378 | * that it is suffixed with a space or comma | |
379 | */ | |
380 | next == check_roundtrip_encoding + len || ( | |
381 | next < check_roundtrip_encoding + len && | |
382 | (isspace(next[0]) || next[0] == ',') | |
383 | ) | |
384 | )); | |
385 | } | |
386 | ||
107642fe LS |
387 | static const char *default_encoding = "UTF-8"; |
388 | ||
389 | static int encode_to_git(const char *path, const char *src, size_t src_len, | |
390 | struct strbuf *buf, const char *enc, int conv_flags) | |
391 | { | |
392 | char *dst; | |
393 | int dst_len; | |
394 | int die_on_error = conv_flags & CONV_WRITE_OBJECT; | |
395 | ||
396 | /* | |
397 | * No encoding is specified or there is nothing to encode. | |
398 | * Tell the caller that the content was not modified. | |
399 | */ | |
400 | if (!enc || (src && !src_len)) | |
401 | return 0; | |
402 | ||
403 | /* | |
404 | * Looks like we got called from "would_convert_to_git()". | |
405 | * This means Git wants to know if it would encode (= modify!) | |
406 | * the content. Let's answer with "yes", since an encoding was | |
407 | * specified. | |
408 | */ | |
409 | if (!buf && !src) | |
410 | return 1; | |
411 | ||
7a17918c LS |
412 | if (validate_encoding(path, enc, src, src_len, die_on_error)) |
413 | return 0; | |
414 | ||
541d059c | 415 | trace_encoding("source", path, enc, src, src_len); |
107642fe LS |
416 | dst = reencode_string_len(src, src_len, default_encoding, enc, |
417 | &dst_len); | |
418 | if (!dst) { | |
419 | /* | |
420 | * We could add the blob "as-is" to Git. However, on checkout | |
421 | * we would try to reencode to the original encoding. This | |
422 | * would fail and we would leave the user with a messed-up | |
423 | * working tree. Let's try to avoid this by screaming loud. | |
424 | */ | |
425 | const char* msg = _("failed to encode '%s' from %s to %s"); | |
426 | if (die_on_error) | |
427 | die(msg, path, enc, default_encoding); | |
428 | else { | |
429 | error(msg, path, enc, default_encoding); | |
430 | return 0; | |
431 | } | |
432 | } | |
541d059c | 433 | trace_encoding("destination", path, default_encoding, dst, dst_len); |
107642fe | 434 | |
e92d6225 LS |
435 | /* |
436 | * UTF supports lossless conversion round tripping [1] and conversions | |
437 | * between UTF and other encodings are mostly round trip safe as | |
438 | * Unicode aims to be a superset of all other character encodings. | |
439 | * However, certain encodings (e.g. SHIFT-JIS) are known to have round | |
440 | * trip issues [2]. Check the round trip conversion for all encodings | |
441 | * listed in core.checkRoundtripEncoding. | |
442 | * | |
443 | * The round trip check is only performed if content is written to Git. | |
444 | * This ensures that no information is lost during conversion to/from | |
445 | * the internal UTF-8 representation. | |
446 | * | |
447 | * Please note, the code below is not tested because I was not able to | |
448 | * generate a faulty round trip without an iconv error. Iconv errors | |
449 | * are already caught above. | |
450 | * | |
451 | * [1] http://unicode.org/faq/utf_bom.html#gen2 | |
452 | * [2] https://support.microsoft.com/en-us/help/170559/prb-conversion-problem-between-shift-jis-and-unicode | |
453 | */ | |
454 | if (die_on_error && check_roundtrip(enc)) { | |
455 | char *re_src; | |
456 | int re_src_len; | |
457 | ||
458 | re_src = reencode_string_len(dst, dst_len, | |
459 | enc, default_encoding, | |
460 | &re_src_len); | |
461 | ||
462 | trace_printf("Checking roundtrip encoding for %s...\n", enc); | |
463 | trace_encoding("reencoded source", path, enc, | |
464 | re_src, re_src_len); | |
465 | ||
466 | if (!re_src || src_len != re_src_len || | |
467 | memcmp(src, re_src, src_len)) { | |
468 | const char* msg = _("encoding '%s' from %s to %s and " | |
469 | "back is not the same"); | |
470 | die(msg, path, enc, default_encoding); | |
471 | } | |
472 | ||
473 | free(re_src); | |
474 | } | |
475 | ||
107642fe LS |
476 | strbuf_attach(buf, dst, dst_len, dst_len + 1); |
477 | return 1; | |
478 | } | |
479 | ||
480 | static int encode_to_worktree(const char *path, const char *src, size_t src_len, | |
481 | struct strbuf *buf, const char *enc) | |
482 | { | |
483 | char *dst; | |
484 | int dst_len; | |
485 | ||
486 | /* | |
487 | * No encoding is specified or there is nothing to encode. | |
488 | * Tell the caller that the content was not modified. | |
489 | */ | |
490 | if (!enc || (src && !src_len)) | |
491 | return 0; | |
492 | ||
493 | dst = reencode_string_len(src, src_len, enc, default_encoding, | |
494 | &dst_len); | |
495 | if (!dst) { | |
496 | error("failed to encode '%s' from %s to %s", | |
497 | path, default_encoding, enc); | |
498 | return 0; | |
499 | } | |
500 | ||
501 | strbuf_attach(buf, dst, dst_len, dst_len + 1); | |
502 | return 1; | |
503 | } | |
504 | ||
49a6d31f BW |
505 | static int crlf_to_git(const struct index_state *istate, |
506 | const char *path, const char *src, size_t len, | |
c61dcff9 | 507 | struct strbuf *buf, |
8462ff43 | 508 | enum crlf_action crlf_action, int conv_flags) |
6c510bee | 509 | { |
6c510bee | 510 | struct text_stat stats; |
5ecd293d | 511 | char *dst; |
a0ad53c1 | 512 | int convert_crlf_into_lf; |
6c510bee | 513 | |
c61dcff9 | 514 | if (crlf_action == CRLF_BINARY || |
4c3b57b9 | 515 | (src && !len)) |
5ecd293d | 516 | return 0; |
6c510bee | 517 | |
4c3b57b9 JK |
518 | /* |
519 | * If we are doing a dry-run and have no source buffer, there is | |
520 | * nothing to analyze; we must assume we would convert. | |
521 | */ | |
522 | if (!buf && !src) | |
523 | return 1; | |
524 | ||
5ecd293d | 525 | gather_stats(src, len, &stats); |
a0ad53c1 TB |
526 | /* Optimization: No CRLF? Nothing to convert, regardless. */ |
527 | convert_crlf_into_lf = !!stats.crlf; | |
6c510bee | 528 | |
df747b81 | 529 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { |
a7630bd4 | 530 | if (convert_is_binary(len, &stats)) |
5ecd293d | 531 | return 0; |
65237284 | 532 | /* |
1c25d2d8 TB |
533 | * If the file in the index has any CR in it, do not |
534 | * convert. This is the new safer autocrlf handling, | |
535 | * unless we want to renormalize in a merge or | |
536 | * cherry-pick. | |
65237284 | 537 | */ |
8462ff43 | 538 | if ((!(conv_flags & CONV_EOL_RENORMALIZE)) && |
86ff70a0 | 539 | has_crlf_in_index(istate, path)) |
a0ad53c1 | 540 | convert_crlf_into_lf = 0; |
201ac8ef | 541 | } |
8462ff43 TB |
542 | if (((conv_flags & CONV_EOL_RNDTRP_WARN) || |
543 | ((conv_flags & CONV_EOL_RNDTRP_DIE) && len))) { | |
a0ad53c1 TB |
544 | struct text_stat new_stats; |
545 | memcpy(&new_stats, &stats, sizeof(new_stats)); | |
546 | /* simulate "git add" */ | |
547 | if (convert_crlf_into_lf) { | |
548 | new_stats.lonelf += new_stats.crlf; | |
549 | new_stats.crlf = 0; | |
550 | } | |
551 | /* simulate "git checkout" */ | |
552 | if (will_convert_lf_to_crlf(len, &new_stats, crlf_action)) { | |
553 | new_stats.crlf += new_stats.lonelf; | |
554 | new_stats.lonelf = 0; | |
555 | } | |
8462ff43 | 556 | check_global_conv_flags_eol(path, crlf_action, &stats, &new_stats, conv_flags); |
a0ad53c1 TB |
557 | } |
558 | if (!convert_crlf_into_lf) | |
21e5ad50 SP |
559 | return 0; |
560 | ||
92ac3197 JK |
561 | /* |
562 | * At this point all of our source analysis is done, and we are sure we | |
563 | * would convert. If we are in dry-run mode, we can give an answer. | |
564 | */ | |
565 | if (!buf) | |
566 | return 1; | |
567 | ||
90d16ec0 PH |
568 | /* only grow if not in place */ |
569 | if (strbuf_avail(buf) + buf->len < len) | |
570 | strbuf_grow(buf, len - buf->len); | |
5ecd293d | 571 | dst = buf->buf; |
df747b81 | 572 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { |
163b9591 JH |
573 | /* |
574 | * If we guessed, we already know we rejected a file with | |
575 | * lone CR, and we can strip a CR without looking at what | |
576 | * follow it. | |
577 | */ | |
201ac8ef | 578 | do { |
ac78e548 | 579 | unsigned char c = *src++; |
201ac8ef | 580 | if (c != '\r') |
ac78e548 | 581 | *dst++ = c; |
5ecd293d | 582 | } while (--len); |
201ac8ef JH |
583 | } else { |
584 | do { | |
ac78e548 | 585 | unsigned char c = *src++; |
5ecd293d | 586 | if (! (c == '\r' && (1 < len && *src == '\n'))) |
ac78e548 | 587 | *dst++ = c; |
5ecd293d | 588 | } while (--len); |
201ac8ef | 589 | } |
5ecd293d PH |
590 | strbuf_setlen(buf, dst - buf->buf); |
591 | return 1; | |
6c510bee LT |
592 | } |
593 | ||
5ecd293d | 594 | static int crlf_to_worktree(const char *path, const char *src, size_t len, |
c61dcff9 | 595 | struct strbuf *buf, enum crlf_action crlf_action) |
6c510bee | 596 | { |
5ecd293d | 597 | char *to_free = NULL; |
6c510bee | 598 | struct text_stat stats; |
6c510bee | 599 | |
c61dcff9 | 600 | if (!len || output_eol(crlf_action) != EOL_CRLF) |
5ecd293d | 601 | return 0; |
6c510bee | 602 | |
5ecd293d | 603 | gather_stats(src, len, &stats); |
a0ad53c1 | 604 | if (!will_convert_lf_to_crlf(len, &stats, crlf_action)) |
5ecd293d | 605 | return 0; |
6c510bee | 606 | |
5ecd293d PH |
607 | /* are we "faking" in place editing ? */ |
608 | if (src == buf->buf) | |
b315c5c0 | 609 | to_free = strbuf_detach(buf, NULL); |
5ecd293d | 610 | |
6e336a53 | 611 | strbuf_grow(buf, len + stats.lonelf); |
5ecd293d PH |
612 | for (;;) { |
613 | const char *nl = memchr(src, '\n', len); | |
614 | if (!nl) | |
615 | break; | |
616 | if (nl > src && nl[-1] == '\r') { | |
617 | strbuf_add(buf, src, nl + 1 - src); | |
618 | } else { | |
619 | strbuf_add(buf, src, nl - src); | |
620 | strbuf_addstr(buf, "\r\n"); | |
621 | } | |
622 | len -= nl + 1 - src; | |
623 | src = nl + 1; | |
624 | } | |
625 | strbuf_add(buf, src, len); | |
626 | ||
627 | free(to_free); | |
628 | return 1; | |
6c510bee | 629 | } |
35ebfd6a | 630 | |
546bb582 JS |
631 | struct filter_params { |
632 | const char *src; | |
633 | unsigned long size; | |
9035d75a | 634 | int fd; |
546bb582 | 635 | const char *cmd; |
a2b665de | 636 | const char *path; |
546bb582 JS |
637 | }; |
638 | ||
9035d75a | 639 | static int filter_buffer_or_fd(int in, int out, void *data) |
aa4ed402 JH |
640 | { |
641 | /* | |
642 | * Spawn cmd and feed the buffer contents through its stdin. | |
643 | */ | |
d3180279 | 644 | struct child_process child_process = CHILD_PROCESS_INIT; |
546bb582 | 645 | struct filter_params *params = (struct filter_params *)data; |
aa4ed402 | 646 | int write_err, status; |
66dbfd55 GV |
647 | const char *argv[] = { NULL, NULL }; |
648 | ||
a2b665de PW |
649 | /* apply % substitution to cmd */ |
650 | struct strbuf cmd = STRBUF_INIT; | |
651 | struct strbuf path = STRBUF_INIT; | |
652 | struct strbuf_expand_dict_entry dict[] = { | |
653 | { "f", NULL, }, | |
654 | { NULL, NULL, }, | |
655 | }; | |
656 | ||
657 | /* quote the path to preserve spaces, etc. */ | |
658 | sq_quote_buf(&path, params->path); | |
659 | dict[0].value = path.buf; | |
660 | ||
661 | /* expand all %f with the quoted path */ | |
662 | strbuf_expand(&cmd, params->cmd, strbuf_expand_dict_cb, &dict); | |
663 | strbuf_release(&path); | |
664 | ||
665 | argv[0] = cmd.buf; | |
aa4ed402 | 666 | |
dc1bfdcd | 667 | child_process.argv = argv; |
ac0ba18d | 668 | child_process.use_shell = 1; |
dc1bfdcd | 669 | child_process.in = -1; |
ae6a5609 | 670 | child_process.out = out; |
aa4ed402 | 671 | |
f31f1d39 RS |
672 | if (start_command(&child_process)) { |
673 | strbuf_release(&cmd); | |
255f04d6 | 674 | return error("cannot fork to run external filter '%s'", params->cmd); |
f31f1d39 | 675 | } |
aa4ed402 | 676 | |
6424c2ad JB |
677 | sigchain_push(SIGPIPE, SIG_IGN); |
678 | ||
9035d75a | 679 | if (params->src) { |
0c4dd67a JH |
680 | write_err = (write_in_full(child_process.in, |
681 | params->src, params->size) < 0); | |
682 | if (errno == EPIPE) | |
683 | write_err = 0; | |
9035d75a SP |
684 | } else { |
685 | write_err = copy_fd(params->fd, child_process.in); | |
0c4dd67a JH |
686 | if (write_err == COPY_WRITE_ERROR && errno == EPIPE) |
687 | write_err = 0; | |
9035d75a SP |
688 | } |
689 | ||
dc1bfdcd | 690 | if (close(child_process.in)) |
aa4ed402 JH |
691 | write_err = 1; |
692 | if (write_err) | |
255f04d6 | 693 | error("cannot feed the input to external filter '%s'", params->cmd); |
aa4ed402 | 694 | |
6424c2ad JB |
695 | sigchain_pop(SIGPIPE); |
696 | ||
aa4ed402 JH |
697 | status = finish_command(&child_process); |
698 | if (status) | |
255f04d6 | 699 | error("external filter '%s' failed %d", params->cmd, status); |
a2b665de PW |
700 | |
701 | strbuf_release(&cmd); | |
aa4ed402 JH |
702 | return (write_err || status); |
703 | } | |
704 | ||
234fa07e | 705 | static int apply_single_file_filter(const char *path, const char *src, size_t len, int fd, |
5ecd293d | 706 | struct strbuf *dst, const char *cmd) |
aa4ed402 JH |
707 | { |
708 | /* | |
709 | * Create a pipeline to have the command filter the buffer's | |
710 | * contents. | |
711 | * | |
712 | * (child --> cmd) --> us | |
713 | */ | |
b84be553 | 714 | int err = 0; |
f285a2d7 | 715 | struct strbuf nbuf = STRBUF_INIT; |
546bb582 JS |
716 | struct async async; |
717 | struct filter_params params; | |
aa4ed402 | 718 | |
546bb582 | 719 | memset(&async, 0, sizeof(async)); |
9035d75a | 720 | async.proc = filter_buffer_or_fd; |
546bb582 | 721 | async.data = ¶ms; |
ae6a5609 | 722 | async.out = -1; |
546bb582 JS |
723 | params.src = src; |
724 | params.size = len; | |
9035d75a | 725 | params.fd = fd; |
546bb582 | 726 | params.cmd = cmd; |
a2b665de | 727 | params.path = path; |
aa4ed402 JH |
728 | |
729 | fflush(NULL); | |
546bb582 JS |
730 | if (start_async(&async)) |
731 | return 0; /* error was already reported */ | |
aa4ed402 | 732 | |
546bb582 | 733 | if (strbuf_read(&nbuf, async.out, len) < 0) { |
b84be553 | 734 | err = error("read from external filter '%s' failed", cmd); |
aa4ed402 | 735 | } |
546bb582 | 736 | if (close(async.out)) { |
b84be553 | 737 | err = error("read from external filter '%s' failed", cmd); |
aa4ed402 | 738 | } |
546bb582 | 739 | if (finish_async(&async)) { |
b84be553 | 740 | err = error("external filter '%s' failed", cmd); |
aa4ed402 JH |
741 | } |
742 | ||
b84be553 | 743 | if (!err) { |
90d16ec0 | 744 | strbuf_swap(dst, &nbuf); |
5ecd293d | 745 | } |
90d16ec0 | 746 | strbuf_release(&nbuf); |
b84be553 | 747 | return !err; |
aa4ed402 JH |
748 | } |
749 | ||
234fa07e LS |
750 | #define CAP_CLEAN (1u<<0) |
751 | #define CAP_SMUDGE (1u<<1) | |
2841e8f8 | 752 | #define CAP_DELAY (1u<<2) |
234fa07e | 753 | |
1b0b46ee BP |
754 | struct cmd2process { |
755 | struct subprocess_entry subprocess; /* must be the first member! */ | |
756 | unsigned int supported_capabilities; | |
757 | }; | |
758 | ||
f514d7d1 BP |
759 | static int subprocess_map_initialized; |
760 | static struct hashmap subprocess_map; | |
edcc8581 | 761 | |
7ddb9b2c | 762 | static int start_multi_file_filter_fn(struct subprocess_entry *subprocess) |
edcc8581 | 763 | { |
fa64a2fd JT |
764 | static int versions[] = {2, 0}; |
765 | static struct subprocess_capability capabilities[] = { | |
1514c8ed LS |
766 | { "clean", CAP_CLEAN }, |
767 | { "smudge", CAP_SMUDGE }, | |
2841e8f8 | 768 | { "delay", CAP_DELAY }, |
fa64a2fd | 769 | { NULL, 0 } |
1514c8ed | 770 | }; |
fa64a2fd JT |
771 | struct cmd2process *entry = (struct cmd2process *)subprocess; |
772 | return subprocess_handshake(subprocess, "git-filter", versions, NULL, | |
773 | capabilities, | |
774 | &entry->supported_capabilities); | |
a810ea99 BP |
775 | } |
776 | ||
9364fc29 LS |
777 | static void handle_filter_error(const struct strbuf *filter_status, |
778 | struct cmd2process *entry, | |
779 | const unsigned int wanted_capability) { | |
780 | if (!strcmp(filter_status->buf, "error")) | |
781 | ; /* The filter signaled a problem with the file. */ | |
782 | else if (!strcmp(filter_status->buf, "abort") && wanted_capability) { | |
783 | /* | |
784 | * The filter signaled a permanent problem. Don't try to filter | |
785 | * files with the same command for the lifetime of the current | |
786 | * Git process. | |
787 | */ | |
788 | entry->supported_capabilities &= ~wanted_capability; | |
789 | } else { | |
790 | /* | |
791 | * Something went wrong with the protocol filter. | |
792 | * Force shutdown and restart if another blob requires filtering. | |
793 | */ | |
794 | error("external filter '%s' failed", entry->subprocess.cmd); | |
795 | subprocess_stop(&subprocess_map, &entry->subprocess); | |
796 | free(entry); | |
797 | } | |
798 | } | |
799 | ||
edcc8581 LS |
800 | static int apply_multi_file_filter(const char *path, const char *src, size_t len, |
801 | int fd, struct strbuf *dst, const char *cmd, | |
2841e8f8 LS |
802 | const unsigned int wanted_capability, |
803 | struct delayed_checkout *dco) | |
edcc8581 LS |
804 | { |
805 | int err; | |
2841e8f8 | 806 | int can_delay = 0; |
edcc8581 LS |
807 | struct cmd2process *entry; |
808 | struct child_process *process; | |
809 | struct strbuf nbuf = STRBUF_INIT; | |
810 | struct strbuf filter_status = STRBUF_INIT; | |
811 | const char *filter_type; | |
812 | ||
f514d7d1 BP |
813 | if (!subprocess_map_initialized) { |
814 | subprocess_map_initialized = 1; | |
9ab42958 | 815 | hashmap_init(&subprocess_map, cmd2process_cmp, NULL, 0); |
edcc8581 LS |
816 | entry = NULL; |
817 | } else { | |
f514d7d1 | 818 | entry = (struct cmd2process *)subprocess_find_entry(&subprocess_map, cmd); |
edcc8581 LS |
819 | } |
820 | ||
821 | fflush(NULL); | |
822 | ||
823 | if (!entry) { | |
7ddb9b2c BP |
824 | entry = xmalloc(sizeof(*entry)); |
825 | entry->supported_capabilities = 0; | |
826 | ||
f514d7d1 | 827 | if (subprocess_start(&subprocess_map, &entry->subprocess, cmd, start_multi_file_filter_fn)) { |
7ddb9b2c | 828 | free(entry); |
edcc8581 | 829 | return 0; |
7ddb9b2c | 830 | } |
edcc8581 | 831 | } |
1b0b46ee | 832 | process = &entry->subprocess.process; |
edcc8581 | 833 | |
42b0a86c | 834 | if (!(entry->supported_capabilities & wanted_capability)) |
edcc8581 LS |
835 | return 0; |
836 | ||
42b0a86c | 837 | if (wanted_capability & CAP_CLEAN) |
edcc8581 | 838 | filter_type = "clean"; |
42b0a86c | 839 | else if (wanted_capability & CAP_SMUDGE) |
edcc8581 LS |
840 | filter_type = "smudge"; |
841 | else | |
842 | die("unexpected filter type"); | |
843 | ||
844 | sigchain_push(SIGPIPE, SIG_IGN); | |
845 | ||
846 | assert(strlen(filter_type) < LARGE_PACKET_DATA_MAX - strlen("command=\n")); | |
847 | err = packet_write_fmt_gently(process->in, "command=%s\n", filter_type); | |
848 | if (err) | |
849 | goto done; | |
850 | ||
851 | err = strlen(path) > LARGE_PACKET_DATA_MAX - strlen("pathname=\n"); | |
852 | if (err) { | |
853 | error("path name too long for external filter"); | |
854 | goto done; | |
855 | } | |
856 | ||
857 | err = packet_write_fmt_gently(process->in, "pathname=%s\n", path); | |
858 | if (err) | |
859 | goto done; | |
860 | ||
2841e8f8 LS |
861 | if ((entry->supported_capabilities & CAP_DELAY) && |
862 | dco && dco->state == CE_CAN_DELAY) { | |
863 | can_delay = 1; | |
864 | err = packet_write_fmt_gently(process->in, "can-delay=1\n"); | |
865 | if (err) | |
866 | goto done; | |
867 | } | |
868 | ||
edcc8581 LS |
869 | err = packet_flush_gently(process->in); |
870 | if (err) | |
871 | goto done; | |
872 | ||
873 | if (fd >= 0) | |
874 | err = write_packetized_from_fd(fd, process->in); | |
875 | else | |
876 | err = write_packetized_from_buf(src, len, process->in); | |
877 | if (err) | |
878 | goto done; | |
879 | ||
4f2a2e9f BP |
880 | err = subprocess_read_status(process->out, &filter_status); |
881 | if (err) | |
882 | goto done; | |
883 | ||
2841e8f8 LS |
884 | if (can_delay && !strcmp(filter_status.buf, "delayed")) { |
885 | string_list_insert(&dco->filters, cmd); | |
886 | string_list_insert(&dco->paths, path); | |
887 | } else { | |
888 | /* The filter got the blob and wants to send us a response. */ | |
889 | err = strcmp(filter_status.buf, "success"); | |
890 | if (err) | |
891 | goto done; | |
892 | ||
893 | err = read_packetized_to_strbuf(process->out, &nbuf) < 0; | |
894 | if (err) | |
895 | goto done; | |
896 | ||
897 | err = subprocess_read_status(process->out, &filter_status); | |
898 | if (err) | |
899 | goto done; | |
900 | ||
901 | err = strcmp(filter_status.buf, "success"); | |
902 | } | |
903 | ||
904 | done: | |
905 | sigchain_pop(SIGPIPE); | |
906 | ||
907 | if (err) | |
908 | handle_filter_error(&filter_status, entry, wanted_capability); | |
909 | else | |
910 | strbuf_swap(dst, &nbuf); | |
911 | strbuf_release(&nbuf); | |
912 | return !err; | |
913 | } | |
914 | ||
915 | ||
916 | int async_query_available_blobs(const char *cmd, struct string_list *available_paths) | |
917 | { | |
918 | int err; | |
919 | char *line; | |
920 | struct cmd2process *entry; | |
921 | struct child_process *process; | |
922 | struct strbuf filter_status = STRBUF_INIT; | |
923 | ||
924 | assert(subprocess_map_initialized); | |
925 | entry = (struct cmd2process *)subprocess_find_entry(&subprocess_map, cmd); | |
926 | if (!entry) { | |
927 | error("external filter '%s' is not available anymore although " | |
928 | "not all paths have been filtered", cmd); | |
929 | return 0; | |
930 | } | |
931 | process = &entry->subprocess.process; | |
932 | sigchain_push(SIGPIPE, SIG_IGN); | |
933 | ||
934 | err = packet_write_fmt_gently( | |
935 | process->in, "command=list_available_blobs\n"); | |
edcc8581 LS |
936 | if (err) |
937 | goto done; | |
938 | ||
2841e8f8 | 939 | err = packet_flush_gently(process->in); |
edcc8581 LS |
940 | if (err) |
941 | goto done; | |
942 | ||
2841e8f8 LS |
943 | while ((line = packet_read_line(process->out, NULL))) { |
944 | const char *path; | |
945 | if (skip_prefix(line, "pathname=", &path)) | |
946 | string_list_insert(available_paths, xstrdup(path)); | |
947 | else | |
948 | ; /* ignore unknown keys */ | |
949 | } | |
950 | ||
4f2a2e9f BP |
951 | err = subprocess_read_status(process->out, &filter_status); |
952 | if (err) | |
953 | goto done; | |
954 | ||
edcc8581 LS |
955 | err = strcmp(filter_status.buf, "success"); |
956 | ||
957 | done: | |
958 | sigchain_pop(SIGPIPE); | |
959 | ||
9364fc29 | 960 | if (err) |
2841e8f8 | 961 | handle_filter_error(&filter_status, entry, 0); |
edcc8581 | 962 | return !err; |
aa4ed402 JH |
963 | } |
964 | ||
965 | static struct convert_driver { | |
966 | const char *name; | |
967 | struct convert_driver *next; | |
cd8be6c9 BH |
968 | const char *smudge; |
969 | const char *clean; | |
edcc8581 | 970 | const char *process; |
36daaaca | 971 | int required; |
aa4ed402 JH |
972 | } *user_convert, **user_convert_tail; |
973 | ||
234fa07e LS |
974 | static int apply_filter(const char *path, const char *src, size_t len, |
975 | int fd, struct strbuf *dst, struct convert_driver *drv, | |
2841e8f8 LS |
976 | const unsigned int wanted_capability, |
977 | struct delayed_checkout *dco) | |
234fa07e LS |
978 | { |
979 | const char *cmd = NULL; | |
980 | ||
981 | if (!drv) | |
982 | return 0; | |
983 | ||
984 | if (!dst) | |
985 | return 1; | |
986 | ||
42b0a86c | 987 | if ((wanted_capability & CAP_CLEAN) && !drv->process && drv->clean) |
234fa07e | 988 | cmd = drv->clean; |
42b0a86c | 989 | else if ((wanted_capability & CAP_SMUDGE) && !drv->process && drv->smudge) |
234fa07e LS |
990 | cmd = drv->smudge; |
991 | ||
992 | if (cmd && *cmd) | |
993 | return apply_single_file_filter(path, src, len, fd, dst, cmd); | |
edcc8581 | 994 | else if (drv->process && *drv->process) |
2841e8f8 LS |
995 | return apply_multi_file_filter(path, src, len, fd, dst, |
996 | drv->process, wanted_capability, dco); | |
234fa07e LS |
997 | |
998 | return 0; | |
999 | } | |
1000 | ||
ef90d6d4 | 1001 | static int read_convert_config(const char *var, const char *value, void *cb) |
aa4ed402 | 1002 | { |
d731f0ad | 1003 | const char *key, *name; |
aa4ed402 JH |
1004 | int namelen; |
1005 | struct convert_driver *drv; | |
1006 | ||
1007 | /* | |
1008 | * External conversion drivers are configured using | |
1009 | * "filter.<name>.variable". | |
1010 | */ | |
d731f0ad | 1011 | if (parse_config_key(var, "filter", &name, &namelen, &key) < 0 || !name) |
aa4ed402 | 1012 | return 0; |
aa4ed402 JH |
1013 | for (drv = user_convert; drv; drv = drv->next) |
1014 | if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) | |
1015 | break; | |
1016 | if (!drv) { | |
aa4ed402 | 1017 | drv = xcalloc(1, sizeof(struct convert_driver)); |
182af834 | 1018 | drv->name = xmemdupz(name, namelen); |
aa4ed402 JH |
1019 | *user_convert_tail = drv; |
1020 | user_convert_tail = &(drv->next); | |
1021 | } | |
1022 | ||
aa4ed402 JH |
1023 | /* |
1024 | * filter.<name>.smudge and filter.<name>.clean specifies | |
1025 | * the command line: | |
1026 | * | |
1027 | * command-line | |
1028 | * | |
1029 | * The command-line will not be interpolated in any way. | |
1030 | */ | |
1031 | ||
d731f0ad | 1032 | if (!strcmp("smudge", key)) |
cd8be6c9 BH |
1033 | return git_config_string(&drv->smudge, var, value); |
1034 | ||
d731f0ad | 1035 | if (!strcmp("clean", key)) |
cd8be6c9 | 1036 | return git_config_string(&drv->clean, var, value); |
aa4ed402 | 1037 | |
edcc8581 LS |
1038 | if (!strcmp("process", key)) |
1039 | return git_config_string(&drv->process, var, value); | |
1040 | ||
d731f0ad | 1041 | if (!strcmp("required", key)) { |
36daaaca JB |
1042 | drv->required = git_config_bool(var, value); |
1043 | return 0; | |
1044 | } | |
1045 | ||
aa4ed402 JH |
1046 | return 0; |
1047 | } | |
1048 | ||
3fed15f5 JH |
1049 | static int count_ident(const char *cp, unsigned long size) |
1050 | { | |
1051 | /* | |
af9b54bb | 1052 | * "$Id: 0000000000000000000000000000000000000000 $" <=> "$Id$" |
3fed15f5 JH |
1053 | */ |
1054 | int cnt = 0; | |
1055 | char ch; | |
1056 | ||
1057 | while (size) { | |
1058 | ch = *cp++; | |
1059 | size--; | |
1060 | if (ch != '$') | |
1061 | continue; | |
af9b54bb | 1062 | if (size < 3) |
3fed15f5 | 1063 | break; |
af9b54bb | 1064 | if (memcmp("Id", cp, 2)) |
3fed15f5 | 1065 | continue; |
af9b54bb AP |
1066 | ch = cp[2]; |
1067 | cp += 3; | |
1068 | size -= 3; | |
3fed15f5 | 1069 | if (ch == '$') |
af9b54bb | 1070 | cnt++; /* $Id$ */ |
3fed15f5 JH |
1071 | if (ch != ':') |
1072 | continue; | |
1073 | ||
1074 | /* | |
af9b54bb | 1075 | * "$Id: ... "; scan up to the closing dollar sign and discard. |
3fed15f5 JH |
1076 | */ |
1077 | while (size) { | |
1078 | ch = *cp++; | |
1079 | size--; | |
1080 | if (ch == '$') { | |
1081 | cnt++; | |
1082 | break; | |
1083 | } | |
a9f3049f HG |
1084 | if (ch == '\n') |
1085 | break; | |
3fed15f5 JH |
1086 | } |
1087 | } | |
1088 | return cnt; | |
1089 | } | |
1090 | ||
5ecd293d PH |
1091 | static int ident_to_git(const char *path, const char *src, size_t len, |
1092 | struct strbuf *buf, int ident) | |
3fed15f5 | 1093 | { |
5ecd293d | 1094 | char *dst, *dollar; |
3fed15f5 | 1095 | |
4c3b57b9 | 1096 | if (!ident || (src && !count_ident(src, len))) |
5ecd293d PH |
1097 | return 0; |
1098 | ||
92ac3197 JK |
1099 | if (!buf) |
1100 | return 1; | |
1101 | ||
90d16ec0 PH |
1102 | /* only grow if not in place */ |
1103 | if (strbuf_avail(buf) + buf->len < len) | |
1104 | strbuf_grow(buf, len - buf->len); | |
5ecd293d PH |
1105 | dst = buf->buf; |
1106 | for (;;) { | |
1107 | dollar = memchr(src, '$', len); | |
1108 | if (!dollar) | |
1109 | break; | |
77321184 | 1110 | memmove(dst, src, dollar + 1 - src); |
5ecd293d PH |
1111 | dst += dollar + 1 - src; |
1112 | len -= dollar + 1 - src; | |
1113 | src = dollar + 1; | |
1114 | ||
1115 | if (len > 3 && !memcmp(src, "Id:", 3)) { | |
1116 | dollar = memchr(src + 3, '$', len - 3); | |
1117 | if (!dollar) | |
1118 | break; | |
a9f3049f HG |
1119 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
1120 | /* Line break before the next dollar. */ | |
1121 | continue; | |
1122 | } | |
1123 | ||
af9b54bb AP |
1124 | memcpy(dst, "Id$", 3); |
1125 | dst += 3; | |
5ecd293d PH |
1126 | len -= dollar + 1 - src; |
1127 | src = dollar + 1; | |
3fed15f5 JH |
1128 | } |
1129 | } | |
77321184 | 1130 | memmove(dst, src, len); |
5ecd293d PH |
1131 | strbuf_setlen(buf, dst + len - buf->buf); |
1132 | return 1; | |
3fed15f5 JH |
1133 | } |
1134 | ||
5ecd293d PH |
1135 | static int ident_to_worktree(const char *path, const char *src, size_t len, |
1136 | struct strbuf *buf, int ident) | |
3fed15f5 | 1137 | { |
f070facc | 1138 | struct object_id oid; |
07814d90 | 1139 | char *to_free = NULL, *dollar, *spc; |
5ecd293d | 1140 | int cnt; |
3fed15f5 JH |
1141 | |
1142 | if (!ident) | |
5ecd293d | 1143 | return 0; |
3fed15f5 | 1144 | |
5ecd293d | 1145 | cnt = count_ident(src, len); |
3fed15f5 | 1146 | if (!cnt) |
5ecd293d | 1147 | return 0; |
3fed15f5 | 1148 | |
5ecd293d PH |
1149 | /* are we "faking" in place editing ? */ |
1150 | if (src == buf->buf) | |
b315c5c0 | 1151 | to_free = strbuf_detach(buf, NULL); |
f070facc | 1152 | hash_object_file(src, len, "blob", &oid); |
3fed15f5 | 1153 | |
1a750441 | 1154 | strbuf_grow(buf, len + cnt * (the_hash_algo->hexsz + 3)); |
5ecd293d PH |
1155 | for (;;) { |
1156 | /* step 1: run to the next '$' */ | |
1157 | dollar = memchr(src, '$', len); | |
1158 | if (!dollar) | |
1159 | break; | |
1160 | strbuf_add(buf, src, dollar + 1 - src); | |
1161 | len -= dollar + 1 - src; | |
1162 | src = dollar + 1; | |
c23290d5 | 1163 | |
5ecd293d PH |
1164 | /* step 2: does it looks like a bit like Id:xxx$ or Id$ ? */ |
1165 | if (len < 3 || memcmp("Id", src, 2)) | |
3fed15f5 JH |
1166 | continue; |
1167 | ||
5ecd293d PH |
1168 | /* step 3: skip over Id$ or Id:xxxxx$ */ |
1169 | if (src[2] == '$') { | |
1170 | src += 3; | |
1171 | len -= 3; | |
1172 | } else if (src[2] == ':') { | |
1173 | /* | |
1174 | * It's possible that an expanded Id has crept its way into the | |
07814d90 HG |
1175 | * repository, we cope with that by stripping the expansion out. |
1176 | * This is probably not a good idea, since it will cause changes | |
1177 | * on checkout, which won't go away by stash, but let's keep it | |
1178 | * for git-style ids. | |
5ecd293d PH |
1179 | */ |
1180 | dollar = memchr(src + 3, '$', len - 3); | |
1181 | if (!dollar) { | |
1182 | /* incomplete keyword, no more '$', so just quit the loop */ | |
1183 | break; | |
1184 | } | |
c23290d5 | 1185 | |
a9f3049f HG |
1186 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
1187 | /* Line break before the next dollar. */ | |
1188 | continue; | |
1189 | } | |
1190 | ||
07814d90 HG |
1191 | spc = memchr(src + 4, ' ', dollar - src - 4); |
1192 | if (spc && spc < dollar-1) { | |
1193 | /* There are spaces in unexpected places. | |
1194 | * This is probably an id from some other | |
1195 | * versioning system. Keep it for now. | |
1196 | */ | |
1197 | continue; | |
1198 | } | |
1199 | ||
5ecd293d PH |
1200 | len -= dollar + 1 - src; |
1201 | src = dollar + 1; | |
1202 | } else { | |
1203 | /* it wasn't a "Id$" or "Id:xxxx$" */ | |
1204 | continue; | |
1205 | } | |
c23290d5 | 1206 | |
5ecd293d PH |
1207 | /* step 4: substitute */ |
1208 | strbuf_addstr(buf, "Id: "); | |
f070facc | 1209 | strbuf_addstr(buf, oid_to_hex(&oid)); |
5ecd293d | 1210 | strbuf_addstr(buf, " $"); |
3fed15f5 | 1211 | } |
5ecd293d | 1212 | strbuf_add(buf, src, len); |
3fed15f5 | 1213 | |
5ecd293d PH |
1214 | free(to_free); |
1215 | return 1; | |
35ebfd6a JH |
1216 | } |
1217 | ||
107642fe LS |
1218 | static const char *git_path_check_encoding(struct attr_check_item *check) |
1219 | { | |
1220 | const char *value = check->value; | |
1221 | ||
1222 | if (ATTR_UNSET(value) || !strlen(value)) | |
1223 | return NULL; | |
1224 | ||
1225 | if (ATTR_TRUE(value) || ATTR_FALSE(value)) { | |
1226 | die(_("true/false are no valid working-tree-encodings")); | |
1227 | } | |
1228 | ||
1229 | /* Don't encode to the default encoding */ | |
1230 | if (same_encoding(value, default_encoding)) | |
1231 | return NULL; | |
1232 | ||
1233 | return value; | |
1234 | } | |
1235 | ||
7bd18054 | 1236 | static enum crlf_action git_path_check_crlf(struct attr_check_item *check) |
35ebfd6a | 1237 | { |
6073ee85 JH |
1238 | const char *value = check->value; |
1239 | ||
1240 | if (ATTR_TRUE(value)) | |
1241 | return CRLF_TEXT; | |
1242 | else if (ATTR_FALSE(value)) | |
1243 | return CRLF_BINARY; | |
1244 | else if (ATTR_UNSET(value)) | |
1245 | ; | |
1246 | else if (!strcmp(value, "input")) | |
df747b81 | 1247 | return CRLF_TEXT_INPUT; |
fd6cce9e EB |
1248 | else if (!strcmp(value, "auto")) |
1249 | return CRLF_AUTO; | |
df747b81 | 1250 | return CRLF_UNDEFINED; |
35ebfd6a JH |
1251 | } |
1252 | ||
7bd18054 | 1253 | static enum eol git_path_check_eol(struct attr_check_item *check) |
fd6cce9e EB |
1254 | { |
1255 | const char *value = check->value; | |
1256 | ||
1257 | if (ATTR_UNSET(value)) | |
1258 | ; | |
1259 | else if (!strcmp(value, "lf")) | |
1260 | return EOL_LF; | |
1261 | else if (!strcmp(value, "crlf")) | |
1262 | return EOL_CRLF; | |
1263 | return EOL_UNSET; | |
1264 | } | |
1265 | ||
7bd18054 | 1266 | static struct convert_driver *git_path_check_convert(struct attr_check_item *check) |
aa4ed402 JH |
1267 | { |
1268 | const char *value = check->value; | |
1269 | struct convert_driver *drv; | |
1270 | ||
1271 | if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) | |
1272 | return NULL; | |
1273 | for (drv = user_convert; drv; drv = drv->next) | |
1274 | if (!strcmp(value, drv->name)) | |
1275 | return drv; | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
7bd18054 | 1279 | static int git_path_check_ident(struct attr_check_item *check) |
3fed15f5 JH |
1280 | { |
1281 | const char *value = check->value; | |
1282 | ||
1283 | return !!ATTR_TRUE(value); | |
1284 | } | |
1285 | ||
3bfba20d JH |
1286 | struct conv_attrs { |
1287 | struct convert_driver *drv; | |
bb211b4d TB |
1288 | enum crlf_action attr_action; /* What attr says */ |
1289 | enum crlf_action crlf_action; /* When no attr is set, use core.autocrlf */ | |
3bfba20d | 1290 | int ident; |
107642fe | 1291 | const char *working_tree_encoding; /* Supported encoding or default encoding if NULL */ |
3bfba20d JH |
1292 | }; |
1293 | ||
3bfba20d | 1294 | static void convert_attrs(struct conv_attrs *ca, const char *path) |
83295964 | 1295 | { |
2aef63d3 | 1296 | static struct attr_check *check; |
83295964 | 1297 | |
2aef63d3 JH |
1298 | if (!check) { |
1299 | check = attr_check_initl("crlf", "ident", "filter", | |
107642fe LS |
1300 | "eol", "text", "working-tree-encoding", |
1301 | NULL); | |
83295964 JH |
1302 | user_convert_tail = &user_convert; |
1303 | git_config(read_convert_config, NULL); | |
1304 | } | |
3bfba20d | 1305 | |
2aef63d3 JH |
1306 | if (!git_check_attr(path, check)) { |
1307 | struct attr_check_item *ccheck = check->items; | |
bb211b4d | 1308 | ca->crlf_action = git_path_check_crlf(ccheck + 4); |
df747b81 | 1309 | if (ca->crlf_action == CRLF_UNDEFINED) |
92cce135 TB |
1310 | ca->crlf_action = git_path_check_crlf(ccheck + 0); |
1311 | ca->ident = git_path_check_ident(ccheck + 1); | |
1312 | ca->drv = git_path_check_convert(ccheck + 2); | |
817a0c79 TB |
1313 | if (ca->crlf_action != CRLF_BINARY) { |
1314 | enum eol eol_attr = git_path_check_eol(ccheck + 3); | |
65237284 TB |
1315 | if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_LF) |
1316 | ca->crlf_action = CRLF_AUTO_INPUT; | |
1317 | else if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_CRLF) | |
1318 | ca->crlf_action = CRLF_AUTO_CRLF; | |
1319 | else if (eol_attr == EOL_LF) | |
817a0c79 TB |
1320 | ca->crlf_action = CRLF_TEXT_INPUT; |
1321 | else if (eol_attr == EOL_CRLF) | |
1322 | ca->crlf_action = CRLF_TEXT_CRLF; | |
1323 | } | |
107642fe | 1324 | ca->working_tree_encoding = git_path_check_encoding(ccheck + 5); |
3bfba20d JH |
1325 | } else { |
1326 | ca->drv = NULL; | |
df747b81 | 1327 | ca->crlf_action = CRLF_UNDEFINED; |
3bfba20d JH |
1328 | ca->ident = 0; |
1329 | } | |
5c94c93d MÅ |
1330 | |
1331 | /* Save attr and make a decision for action */ | |
1332 | ca->attr_action = ca->crlf_action; | |
df747b81 TB |
1333 | if (ca->crlf_action == CRLF_TEXT) |
1334 | ca->crlf_action = text_eol_is_crlf() ? CRLF_TEXT_CRLF : CRLF_TEXT_INPUT; | |
1335 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_FALSE) | |
1336 | ca->crlf_action = CRLF_BINARY; | |
1337 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_TRUE) | |
1338 | ca->crlf_action = CRLF_AUTO_CRLF; | |
1339 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_INPUT) | |
1340 | ca->crlf_action = CRLF_AUTO_INPUT; | |
83295964 JH |
1341 | } |
1342 | ||
9035d75a SP |
1343 | int would_convert_to_git_filter_fd(const char *path) |
1344 | { | |
1345 | struct conv_attrs ca; | |
1346 | ||
1347 | convert_attrs(&ca, path); | |
1348 | if (!ca.drv) | |
1349 | return 0; | |
1350 | ||
1351 | /* | |
1352 | * Apply a filter to an fd only if the filter is required to succeed. | |
1353 | * We must die if the filter fails, because the original data before | |
1354 | * filtering is not available. | |
1355 | */ | |
1356 | if (!ca.drv->required) | |
1357 | return 0; | |
1358 | ||
2841e8f8 | 1359 | return apply_filter(path, NULL, 0, -1, NULL, ca.drv, CAP_CLEAN, NULL); |
9035d75a SP |
1360 | } |
1361 | ||
a7630bd4 TB |
1362 | const char *get_convert_attr_ascii(const char *path) |
1363 | { | |
1364 | struct conv_attrs ca; | |
a7630bd4 TB |
1365 | |
1366 | convert_attrs(&ca, path); | |
bb211b4d | 1367 | switch (ca.attr_action) { |
df747b81 | 1368 | case CRLF_UNDEFINED: |
a7630bd4 TB |
1369 | return ""; |
1370 | case CRLF_BINARY: | |
1371 | return "-text"; | |
1372 | case CRLF_TEXT: | |
1373 | return "text"; | |
df747b81 | 1374 | case CRLF_TEXT_INPUT: |
a7630bd4 | 1375 | return "text eol=lf"; |
df747b81 TB |
1376 | case CRLF_TEXT_CRLF: |
1377 | return "text eol=crlf"; | |
a7630bd4 TB |
1378 | case CRLF_AUTO: |
1379 | return "text=auto"; | |
df747b81 | 1380 | case CRLF_AUTO_CRLF: |
65237284 | 1381 | return "text=auto eol=crlf"; |
df747b81 | 1382 | case CRLF_AUTO_INPUT: |
65237284 | 1383 | return "text=auto eol=lf"; |
a7630bd4 TB |
1384 | } |
1385 | return ""; | |
1386 | } | |
1387 | ||
82b474e0 BW |
1388 | int convert_to_git(const struct index_state *istate, |
1389 | const char *path, const char *src, size_t len, | |
8462ff43 | 1390 | struct strbuf *dst, int conv_flags) |
35ebfd6a | 1391 | { |
3bfba20d | 1392 | int ret = 0; |
3bfba20d | 1393 | struct conv_attrs ca; |
6073ee85 | 1394 | |
3bfba20d | 1395 | convert_attrs(&ca, path); |
3fed15f5 | 1396 | |
2841e8f8 | 1397 | ret |= apply_filter(path, src, len, -1, dst, ca.drv, CAP_CLEAN, NULL); |
234fa07e | 1398 | if (!ret && ca.drv && ca.drv->required) |
36daaaca JB |
1399 | die("%s: clean filter '%s' failed", path, ca.drv->name); |
1400 | ||
92ac3197 | 1401 | if (ret && dst) { |
5ecd293d PH |
1402 | src = dst->buf; |
1403 | len = dst->len; | |
aa4ed402 | 1404 | } |
107642fe LS |
1405 | |
1406 | ret |= encode_to_git(path, src, len, dst, ca.working_tree_encoding, conv_flags); | |
1407 | if (ret && dst) { | |
1408 | src = dst->buf; | |
1409 | len = dst->len; | |
1410 | } | |
1411 | ||
8462ff43 TB |
1412 | if (!(conv_flags & CONV_EOL_KEEP_CRLF)) { |
1413 | ret |= crlf_to_git(istate, path, src, len, dst, ca.crlf_action, conv_flags); | |
2fea9de6 TB |
1414 | if (ret && dst) { |
1415 | src = dst->buf; | |
1416 | len = dst->len; | |
1417 | } | |
6073ee85 | 1418 | } |
3bfba20d | 1419 | return ret | ident_to_git(path, src, len, dst, ca.ident); |
35ebfd6a JH |
1420 | } |
1421 | ||
d6c41c20 BW |
1422 | void convert_to_git_filter_fd(const struct index_state *istate, |
1423 | const char *path, int fd, struct strbuf *dst, | |
8462ff43 | 1424 | int conv_flags) |
9035d75a SP |
1425 | { |
1426 | struct conv_attrs ca; | |
1427 | convert_attrs(&ca, path); | |
1428 | ||
1429 | assert(ca.drv); | |
edcc8581 | 1430 | assert(ca.drv->clean || ca.drv->process); |
9035d75a | 1431 | |
2841e8f8 | 1432 | if (!apply_filter(path, NULL, 0, fd, dst, ca.drv, CAP_CLEAN, NULL)) |
9035d75a SP |
1433 | die("%s: clean filter '%s' failed", path, ca.drv->name); |
1434 | ||
107642fe | 1435 | encode_to_git(path, dst->buf, dst->len, dst, ca.working_tree_encoding, conv_flags); |
8462ff43 | 1436 | crlf_to_git(istate, path, dst->buf, dst->len, dst, ca.crlf_action, conv_flags); |
9035d75a SP |
1437 | ident_to_git(path, dst->buf, dst->len, dst, ca.ident); |
1438 | } | |
1439 | ||
43dd2332 EB |
1440 | static int convert_to_working_tree_internal(const char *path, const char *src, |
1441 | size_t len, struct strbuf *dst, | |
2841e8f8 | 1442 | int normalizing, struct delayed_checkout *dco) |
35ebfd6a | 1443 | { |
36daaaca | 1444 | int ret = 0, ret_filter = 0; |
3bfba20d | 1445 | struct conv_attrs ca; |
6073ee85 | 1446 | |
3bfba20d | 1447 | convert_attrs(&ca, path); |
3fed15f5 | 1448 | |
3bfba20d | 1449 | ret |= ident_to_worktree(path, src, len, dst, ca.ident); |
5ecd293d PH |
1450 | if (ret) { |
1451 | src = dst->buf; | |
1452 | len = dst->len; | |
3fed15f5 | 1453 | } |
43dd2332 EB |
1454 | /* |
1455 | * CRLF conversion can be skipped if normalizing, unless there | |
edcc8581 LS |
1456 | * is a smudge or process filter (even if the process filter doesn't |
1457 | * support smudge). The filters might expect CRLFs. | |
43dd2332 | 1458 | */ |
edcc8581 | 1459 | if ((ca.drv && (ca.drv->smudge || ca.drv->process)) || !normalizing) { |
3bfba20d | 1460 | ret |= crlf_to_worktree(path, src, len, dst, ca.crlf_action); |
43dd2332 EB |
1461 | if (ret) { |
1462 | src = dst->buf; | |
1463 | len = dst->len; | |
1464 | } | |
aa4ed402 | 1465 | } |
36daaaca | 1466 | |
107642fe LS |
1467 | ret |= encode_to_worktree(path, src, len, dst, ca.working_tree_encoding); |
1468 | if (ret) { | |
1469 | src = dst->buf; | |
1470 | len = dst->len; | |
1471 | } | |
1472 | ||
2841e8f8 LS |
1473 | ret_filter = apply_filter( |
1474 | path, src, len, -1, dst, ca.drv, CAP_SMUDGE, dco); | |
234fa07e | 1475 | if (!ret_filter && ca.drv && ca.drv->required) |
36daaaca JB |
1476 | die("%s: smudge filter %s failed", path, ca.drv->name); |
1477 | ||
1478 | return ret | ret_filter; | |
35ebfd6a | 1479 | } |
f217f0e8 | 1480 | |
2841e8f8 LS |
1481 | int async_convert_to_working_tree(const char *path, const char *src, |
1482 | size_t len, struct strbuf *dst, | |
1483 | void *dco) | |
1484 | { | |
1485 | return convert_to_working_tree_internal(path, src, len, dst, 0, dco); | |
1486 | } | |
1487 | ||
43dd2332 EB |
1488 | int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst) |
1489 | { | |
2841e8f8 | 1490 | return convert_to_working_tree_internal(path, src, len, dst, 0, NULL); |
43dd2332 EB |
1491 | } |
1492 | ||
a33e0b2a BW |
1493 | int renormalize_buffer(const struct index_state *istate, const char *path, |
1494 | const char *src, size_t len, struct strbuf *dst) | |
f217f0e8 | 1495 | { |
2841e8f8 | 1496 | int ret = convert_to_working_tree_internal(path, src, len, dst, 1, NULL); |
f217f0e8 EB |
1497 | if (ret) { |
1498 | src = dst->buf; | |
1499 | len = dst->len; | |
1500 | } | |
8462ff43 | 1501 | return ret | convert_to_git(istate, path, src, len, dst, CONV_EOL_RENORMALIZE); |
f217f0e8 | 1502 | } |
dd8e9121 | 1503 | |
b6691092 JH |
1504 | /***************************************************************** |
1505 | * | |
749f763d | 1506 | * Streaming conversion support |
b6691092 JH |
1507 | * |
1508 | *****************************************************************/ | |
1509 | ||
1510 | typedef int (*filter_fn)(struct stream_filter *, | |
1511 | const char *input, size_t *isize_p, | |
1512 | char *output, size_t *osize_p); | |
1513 | typedef void (*free_fn)(struct stream_filter *); | |
1514 | ||
1515 | struct stream_filter_vtbl { | |
1516 | filter_fn filter; | |
1517 | free_fn free; | |
1518 | }; | |
1519 | ||
1520 | struct stream_filter { | |
1521 | struct stream_filter_vtbl *vtbl; | |
1522 | }; | |
1523 | ||
1524 | static int null_filter_fn(struct stream_filter *filter, | |
1525 | const char *input, size_t *isize_p, | |
1526 | char *output, size_t *osize_p) | |
1527 | { | |
4ae66704 JH |
1528 | size_t count; |
1529 | ||
1530 | if (!input) | |
1531 | return 0; /* we do not keep any states */ | |
1532 | count = *isize_p; | |
b6691092 JH |
1533 | if (*osize_p < count) |
1534 | count = *osize_p; | |
1535 | if (count) { | |
1536 | memmove(output, input, count); | |
1537 | *isize_p -= count; | |
1538 | *osize_p -= count; | |
1539 | } | |
1540 | return 0; | |
1541 | } | |
1542 | ||
1543 | static void null_free_fn(struct stream_filter *filter) | |
1544 | { | |
1545 | ; /* nothing -- null instances are shared */ | |
1546 | } | |
1547 | ||
1548 | static struct stream_filter_vtbl null_vtbl = { | |
1549 | null_filter_fn, | |
1550 | null_free_fn, | |
1551 | }; | |
1552 | ||
1553 | static struct stream_filter null_filter_singleton = { | |
1554 | &null_vtbl, | |
1555 | }; | |
1556 | ||
1557 | int is_null_stream_filter(struct stream_filter *filter) | |
1558 | { | |
1559 | return filter == &null_filter_singleton; | |
1560 | } | |
1561 | ||
b84c7839 JH |
1562 | |
1563 | /* | |
1564 | * LF-to-CRLF filter | |
1565 | */ | |
284e3d28 CMN |
1566 | |
1567 | struct lf_to_crlf_filter { | |
1568 | struct stream_filter filter; | |
8496f568 JH |
1569 | unsigned has_held:1; |
1570 | char held; | |
284e3d28 CMN |
1571 | }; |
1572 | ||
e322ee38 JH |
1573 | static int lf_to_crlf_filter_fn(struct stream_filter *filter, |
1574 | const char *input, size_t *isize_p, | |
1575 | char *output, size_t *osize_p) | |
1576 | { | |
284e3d28 CMN |
1577 | size_t count, o = 0; |
1578 | struct lf_to_crlf_filter *lf_to_crlf = (struct lf_to_crlf_filter *)filter; | |
1579 | ||
8496f568 JH |
1580 | /* |
1581 | * We may be holding onto the CR to see if it is followed by a | |
1582 | * LF, in which case we would need to go to the main loop. | |
1583 | * Otherwise, just emit it to the output stream. | |
1584 | */ | |
1585 | if (lf_to_crlf->has_held && (lf_to_crlf->held != '\r' || !input)) { | |
1586 | output[o++] = lf_to_crlf->held; | |
1587 | lf_to_crlf->has_held = 0; | |
284e3d28 | 1588 | } |
e322ee38 | 1589 | |
87afe9a5 JH |
1590 | /* We are told to drain */ |
1591 | if (!input) { | |
1592 | *osize_p -= o; | |
1593 | return 0; | |
1594 | } | |
e322ee38 | 1595 | |
e322ee38 | 1596 | count = *isize_p; |
8496f568 | 1597 | if (count || lf_to_crlf->has_held) { |
284e3d28 | 1598 | size_t i; |
8496f568 JH |
1599 | int was_cr = 0; |
1600 | ||
1601 | if (lf_to_crlf->has_held) { | |
1602 | was_cr = 1; | |
1603 | lf_to_crlf->has_held = 0; | |
1604 | } | |
1605 | ||
284e3d28 | 1606 | for (i = 0; o < *osize_p && i < count; i++) { |
e322ee38 | 1607 | char ch = input[i]; |
8496f568 | 1608 | |
e322ee38 | 1609 | if (ch == '\n') { |
284e3d28 | 1610 | output[o++] = '\r'; |
8496f568 JH |
1611 | } else if (was_cr) { |
1612 | /* | |
1613 | * Previous round saw CR and it is not followed | |
1614 | * by a LF; emit the CR before processing the | |
1615 | * current character. | |
1616 | */ | |
1617 | output[o++] = '\r'; | |
e322ee38 | 1618 | } |
8496f568 JH |
1619 | |
1620 | /* | |
1621 | * We may have consumed the last output slot, | |
1622 | * in which case we need to break out of this | |
1623 | * loop; hold the current character before | |
1624 | * returning. | |
1625 | */ | |
1626 | if (*osize_p <= o) { | |
1627 | lf_to_crlf->has_held = 1; | |
1628 | lf_to_crlf->held = ch; | |
1629 | continue; /* break but increment i */ | |
1630 | } | |
1631 | ||
1632 | if (ch == '\r') { | |
1633 | was_cr = 1; | |
1634 | continue; | |
1635 | } | |
1636 | ||
1637 | was_cr = 0; | |
e322ee38 JH |
1638 | output[o++] = ch; |
1639 | } | |
1640 | ||
1641 | *osize_p -= o; | |
1642 | *isize_p -= i; | |
8496f568 JH |
1643 | |
1644 | if (!lf_to_crlf->has_held && was_cr) { | |
1645 | lf_to_crlf->has_held = 1; | |
1646 | lf_to_crlf->held = '\r'; | |
1647 | } | |
e322ee38 JH |
1648 | } |
1649 | return 0; | |
1650 | } | |
1651 | ||
284e3d28 CMN |
1652 | static void lf_to_crlf_free_fn(struct stream_filter *filter) |
1653 | { | |
1654 | free(filter); | |
1655 | } | |
1656 | ||
e322ee38 JH |
1657 | static struct stream_filter_vtbl lf_to_crlf_vtbl = { |
1658 | lf_to_crlf_filter_fn, | |
284e3d28 | 1659 | lf_to_crlf_free_fn, |
e322ee38 JH |
1660 | }; |
1661 | ||
284e3d28 CMN |
1662 | static struct stream_filter *lf_to_crlf_filter(void) |
1663 | { | |
87afe9a5 | 1664 | struct lf_to_crlf_filter *lf_to_crlf = xcalloc(1, sizeof(*lf_to_crlf)); |
e322ee38 | 1665 | |
284e3d28 | 1666 | lf_to_crlf->filter.vtbl = &lf_to_crlf_vtbl; |
284e3d28 CMN |
1667 | return (struct stream_filter *)lf_to_crlf; |
1668 | } | |
b84c7839 | 1669 | |
a265a7f9 JH |
1670 | /* |
1671 | * Cascade filter | |
1672 | */ | |
1673 | #define FILTER_BUFFER 1024 | |
1674 | struct cascade_filter { | |
1675 | struct stream_filter filter; | |
1676 | struct stream_filter *one; | |
1677 | struct stream_filter *two; | |
1678 | char buf[FILTER_BUFFER]; | |
1679 | int end, ptr; | |
1680 | }; | |
1681 | ||
1682 | static int cascade_filter_fn(struct stream_filter *filter, | |
1683 | const char *input, size_t *isize_p, | |
1684 | char *output, size_t *osize_p) | |
1685 | { | |
1686 | struct cascade_filter *cas = (struct cascade_filter *) filter; | |
1687 | size_t filled = 0; | |
1688 | size_t sz = *osize_p; | |
1689 | size_t to_feed, remaining; | |
1690 | ||
1691 | /* | |
1692 | * input -- (one) --> buf -- (two) --> output | |
1693 | */ | |
1694 | while (filled < sz) { | |
1695 | remaining = sz - filled; | |
1696 | ||
1697 | /* do we already have something to feed two with? */ | |
1698 | if (cas->ptr < cas->end) { | |
1699 | to_feed = cas->end - cas->ptr; | |
1700 | if (stream_filter(cas->two, | |
1701 | cas->buf + cas->ptr, &to_feed, | |
1702 | output + filled, &remaining)) | |
1703 | return -1; | |
1704 | cas->ptr += (cas->end - cas->ptr) - to_feed; | |
1705 | filled = sz - remaining; | |
1706 | continue; | |
1707 | } | |
1708 | ||
1709 | /* feed one from upstream and have it emit into our buffer */ | |
1710 | to_feed = input ? *isize_p : 0; | |
1711 | if (input && !to_feed) | |
1712 | break; | |
1713 | remaining = sizeof(cas->buf); | |
1714 | if (stream_filter(cas->one, | |
1715 | input, &to_feed, | |
1716 | cas->buf, &remaining)) | |
1717 | return -1; | |
1718 | cas->end = sizeof(cas->buf) - remaining; | |
1719 | cas->ptr = 0; | |
1720 | if (input) { | |
1721 | size_t fed = *isize_p - to_feed; | |
1722 | *isize_p -= fed; | |
1723 | input += fed; | |
1724 | } | |
1725 | ||
1726 | /* do we know that we drained one completely? */ | |
1727 | if (input || cas->end) | |
1728 | continue; | |
1729 | ||
1730 | /* tell two to drain; we have nothing more to give it */ | |
1731 | to_feed = 0; | |
1732 | remaining = sz - filled; | |
1733 | if (stream_filter(cas->two, | |
1734 | NULL, &to_feed, | |
1735 | output + filled, &remaining)) | |
1736 | return -1; | |
1737 | if (remaining == (sz - filled)) | |
1738 | break; /* completely drained two */ | |
1739 | filled = sz - remaining; | |
1740 | } | |
1741 | *osize_p -= filled; | |
1742 | return 0; | |
1743 | } | |
1744 | ||
1745 | static void cascade_free_fn(struct stream_filter *filter) | |
1746 | { | |
1747 | struct cascade_filter *cas = (struct cascade_filter *)filter; | |
1748 | free_stream_filter(cas->one); | |
1749 | free_stream_filter(cas->two); | |
1750 | free(filter); | |
1751 | } | |
1752 | ||
1753 | static struct stream_filter_vtbl cascade_vtbl = { | |
1754 | cascade_filter_fn, | |
1755 | cascade_free_fn, | |
1756 | }; | |
1757 | ||
1758 | static struct stream_filter *cascade_filter(struct stream_filter *one, | |
1759 | struct stream_filter *two) | |
1760 | { | |
1761 | struct cascade_filter *cascade; | |
1762 | ||
1763 | if (!one || is_null_stream_filter(one)) | |
1764 | return two; | |
1765 | if (!two || is_null_stream_filter(two)) | |
1766 | return one; | |
1767 | ||
1768 | cascade = xmalloc(sizeof(*cascade)); | |
1769 | cascade->one = one; | |
1770 | cascade->two = two; | |
1771 | cascade->end = cascade->ptr = 0; | |
1772 | cascade->filter.vtbl = &cascade_vtbl; | |
1773 | return (struct stream_filter *)cascade; | |
1774 | } | |
1775 | ||
b84c7839 JH |
1776 | /* |
1777 | * ident filter | |
1778 | */ | |
1779 | #define IDENT_DRAINING (-1) | |
1780 | #define IDENT_SKIPPING (-2) | |
1781 | struct ident_filter { | |
1782 | struct stream_filter filter; | |
1783 | struct strbuf left; | |
1784 | int state; | |
1a750441 | 1785 | char ident[GIT_MAX_HEXSZ + 5]; /* ": x40 $" */ |
b84c7839 JH |
1786 | }; |
1787 | ||
1788 | static int is_foreign_ident(const char *str) | |
1789 | { | |
1790 | int i; | |
1791 | ||
ae021d87 | 1792 | if (!skip_prefix(str, "$Id: ", &str)) |
b84c7839 | 1793 | return 0; |
ae021d87 | 1794 | for (i = 0; str[i]; i++) { |
b84c7839 JH |
1795 | if (isspace(str[i]) && str[i+1] != '$') |
1796 | return 1; | |
1797 | } | |
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | static void ident_drain(struct ident_filter *ident, char **output_p, size_t *osize_p) | |
1802 | { | |
1803 | size_t to_drain = ident->left.len; | |
1804 | ||
1805 | if (*osize_p < to_drain) | |
1806 | to_drain = *osize_p; | |
1807 | if (to_drain) { | |
1808 | memcpy(*output_p, ident->left.buf, to_drain); | |
1809 | strbuf_remove(&ident->left, 0, to_drain); | |
1810 | *output_p += to_drain; | |
1811 | *osize_p -= to_drain; | |
1812 | } | |
1813 | if (!ident->left.len) | |
1814 | ident->state = 0; | |
1815 | } | |
1816 | ||
1817 | static int ident_filter_fn(struct stream_filter *filter, | |
1818 | const char *input, size_t *isize_p, | |
1819 | char *output, size_t *osize_p) | |
1820 | { | |
1821 | struct ident_filter *ident = (struct ident_filter *)filter; | |
1822 | static const char head[] = "$Id"; | |
1823 | ||
1824 | if (!input) { | |
1825 | /* drain upon eof */ | |
1826 | switch (ident->state) { | |
1827 | default: | |
1828 | strbuf_add(&ident->left, head, ident->state); | |
1cf01a34 | 1829 | /* fallthrough */ |
b84c7839 | 1830 | case IDENT_SKIPPING: |
1cf01a34 | 1831 | /* fallthrough */ |
b84c7839 JH |
1832 | case IDENT_DRAINING: |
1833 | ident_drain(ident, &output, osize_p); | |
1834 | } | |
1835 | return 0; | |
1836 | } | |
1837 | ||
1838 | while (*isize_p || (ident->state == IDENT_DRAINING)) { | |
1839 | int ch; | |
1840 | ||
1841 | if (ident->state == IDENT_DRAINING) { | |
1842 | ident_drain(ident, &output, osize_p); | |
1843 | if (!*osize_p) | |
1844 | break; | |
1845 | continue; | |
1846 | } | |
1847 | ||
1848 | ch = *(input++); | |
1849 | (*isize_p)--; | |
1850 | ||
1851 | if (ident->state == IDENT_SKIPPING) { | |
1852 | /* | |
1853 | * Skipping until '$' or LF, but keeping them | |
1854 | * in case it is a foreign ident. | |
1855 | */ | |
1856 | strbuf_addch(&ident->left, ch); | |
1857 | if (ch != '\n' && ch != '$') | |
1858 | continue; | |
1859 | if (ch == '$' && !is_foreign_ident(ident->left.buf)) { | |
1860 | strbuf_setlen(&ident->left, sizeof(head) - 1); | |
1861 | strbuf_addstr(&ident->left, ident->ident); | |
1862 | } | |
1863 | ident->state = IDENT_DRAINING; | |
1864 | continue; | |
1865 | } | |
1866 | ||
1867 | if (ident->state < sizeof(head) && | |
1868 | head[ident->state] == ch) { | |
1869 | ident->state++; | |
1870 | continue; | |
1871 | } | |
1872 | ||
1873 | if (ident->state) | |
1874 | strbuf_add(&ident->left, head, ident->state); | |
1875 | if (ident->state == sizeof(head) - 1) { | |
1876 | if (ch != ':' && ch != '$') { | |
1877 | strbuf_addch(&ident->left, ch); | |
1878 | ident->state = 0; | |
1879 | continue; | |
1880 | } | |
1881 | ||
1882 | if (ch == ':') { | |
1883 | strbuf_addch(&ident->left, ch); | |
1884 | ident->state = IDENT_SKIPPING; | |
1885 | } else { | |
1886 | strbuf_addstr(&ident->left, ident->ident); | |
1887 | ident->state = IDENT_DRAINING; | |
1888 | } | |
1889 | continue; | |
1890 | } | |
1891 | ||
1892 | strbuf_addch(&ident->left, ch); | |
1893 | ident->state = IDENT_DRAINING; | |
1894 | } | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | static void ident_free_fn(struct stream_filter *filter) | |
1899 | { | |
1900 | struct ident_filter *ident = (struct ident_filter *)filter; | |
1901 | strbuf_release(&ident->left); | |
1902 | free(filter); | |
1903 | } | |
1904 | ||
1905 | static struct stream_filter_vtbl ident_vtbl = { | |
1906 | ident_filter_fn, | |
1907 | ident_free_fn, | |
1908 | }; | |
1909 | ||
1a750441 | 1910 | static struct stream_filter *ident_filter(const struct object_id *oid) |
b84c7839 JH |
1911 | { |
1912 | struct ident_filter *ident = xmalloc(sizeof(*ident)); | |
1913 | ||
5096d490 | 1914 | xsnprintf(ident->ident, sizeof(ident->ident), |
1a750441 | 1915 | ": %s $", oid_to_hex(oid)); |
b84c7839 JH |
1916 | strbuf_init(&ident->left, 0); |
1917 | ident->filter.vtbl = &ident_vtbl; | |
1918 | ident->state = 0; | |
1919 | return (struct stream_filter *)ident; | |
1920 | } | |
1921 | ||
dd8e9121 | 1922 | /* |
b6691092 JH |
1923 | * Return an appropriately constructed filter for the path, or NULL if |
1924 | * the contents cannot be filtered without reading the whole thing | |
1925 | * in-core. | |
1926 | * | |
1927 | * Note that you would be crazy to set CRLF, smuge/clean or ident to a | |
1928 | * large binary blob you would want us not to slurp into the memory! | |
dd8e9121 | 1929 | */ |
1a750441 | 1930 | struct stream_filter *get_stream_filter(const char *path, const struct object_id *oid) |
dd8e9121 JH |
1931 | { |
1932 | struct conv_attrs ca; | |
b84c7839 | 1933 | struct stream_filter *filter = NULL; |
dd8e9121 JH |
1934 | |
1935 | convert_attrs(&ca, path); | |
edcc8581 | 1936 | if (ca.drv && (ca.drv->process || ca.drv->smudge || ca.drv->clean)) |
caa47adc TB |
1937 | return NULL; |
1938 | ||
107642fe LS |
1939 | if (ca.working_tree_encoding) |
1940 | return NULL; | |
1941 | ||
caa47adc TB |
1942 | if (ca.crlf_action == CRLF_AUTO || ca.crlf_action == CRLF_AUTO_CRLF) |
1943 | return NULL; | |
b84c7839 JH |
1944 | |
1945 | if (ca.ident) | |
1a750441 | 1946 | filter = ident_filter(oid); |
dd8e9121 | 1947 | |
caa47adc | 1948 | if (output_eol(ca.crlf_action) == EOL_CRLF) |
284e3d28 | 1949 | filter = cascade_filter(filter, lf_to_crlf_filter()); |
caa47adc TB |
1950 | else |
1951 | filter = cascade_filter(filter, &null_filter_singleton); | |
e322ee38 | 1952 | |
b84c7839 | 1953 | return filter; |
b6691092 JH |
1954 | } |
1955 | ||
1956 | void free_stream_filter(struct stream_filter *filter) | |
1957 | { | |
1958 | filter->vtbl->free(filter); | |
1959 | } | |
1960 | ||
1961 | int stream_filter(struct stream_filter *filter, | |
1962 | const char *input, size_t *isize_p, | |
1963 | char *output, size_t *osize_p) | |
1964 | { | |
1965 | return filter->vtbl->filter(filter, input, isize_p, output, osize_p); | |
dd8e9121 | 1966 | } |