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Commit | Line | Data |
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6c510bee | 1 | #include "cache.h" |
35ebfd6a | 2 | #include "attr.h" |
3fed15f5 | 3 | #include "run-command.h" |
a2b665de | 4 | #include "quote.h" |
6424c2ad | 5 | #include "sigchain.h" |
edcc8581 | 6 | #include "pkt-line.h" |
99605d62 | 7 | #include "sub-process.h" |
35ebfd6a | 8 | |
6c510bee LT |
9 | /* |
10 | * convert.c - convert a file when checking it out and checking it in. | |
11 | * | |
12 | * This should use the pathname to decide on whether it wants to do some | |
13 | * more interesting conversions (automatic gzip/unzip, general format | |
14 | * conversions etc etc), but by default it just does automatic CRLF<->LF | |
942e7747 | 15 | * translation when the "text" attribute or "auto_crlf" option is set. |
6c510bee LT |
16 | */ |
17 | ||
a7630bd4 TB |
18 | /* Stat bits: When BIN is set, the txt bits are unset */ |
19 | #define CONVERT_STAT_BITS_TXT_LF 0x1 | |
20 | #define CONVERT_STAT_BITS_TXT_CRLF 0x2 | |
21 | #define CONVERT_STAT_BITS_BIN 0x4 | |
22 | ||
c61dcff9 | 23 | enum crlf_action { |
df747b81 TB |
24 | CRLF_UNDEFINED, |
25 | CRLF_BINARY, | |
fd6cce9e | 26 | CRLF_TEXT, |
df747b81 TB |
27 | CRLF_TEXT_INPUT, |
28 | CRLF_TEXT_CRLF, | |
29 | CRLF_AUTO, | |
30 | CRLF_AUTO_INPUT, | |
31 | CRLF_AUTO_CRLF | |
fd6cce9e | 32 | }; |
163b9591 | 33 | |
6c510bee | 34 | struct text_stat { |
28624193 | 35 | /* NUL, CR, LF and CRLF counts */ |
6e336a53 | 36 | unsigned nul, lonecr, lonelf, crlf; |
6c510bee LT |
37 | |
38 | /* These are just approximations! */ | |
39 | unsigned printable, nonprintable; | |
40 | }; | |
41 | ||
42 | static void gather_stats(const char *buf, unsigned long size, struct text_stat *stats) | |
43 | { | |
44 | unsigned long i; | |
45 | ||
46 | memset(stats, 0, sizeof(*stats)); | |
47 | ||
48 | for (i = 0; i < size; i++) { | |
49 | unsigned char c = buf[i]; | |
50 | if (c == '\r') { | |
6e336a53 | 51 | if (i+1 < size && buf[i+1] == '\n') { |
6c510bee | 52 | stats->crlf++; |
6e336a53 TB |
53 | i++; |
54 | } else | |
55 | stats->lonecr++; | |
6c510bee LT |
56 | continue; |
57 | } | |
58 | if (c == '\n') { | |
6e336a53 | 59 | stats->lonelf++; |
6c510bee LT |
60 | continue; |
61 | } | |
62 | if (c == 127) | |
63 | /* DEL */ | |
64 | stats->nonprintable++; | |
65 | else if (c < 32) { | |
66 | switch (c) { | |
67 | /* BS, HT, ESC and FF */ | |
68 | case '\b': case '\t': case '\033': case '\014': | |
69 | stats->printable++; | |
70 | break; | |
28624193 DP |
71 | case 0: |
72 | stats->nul++; | |
73 | /* fall through */ | |
6c510bee LT |
74 | default: |
75 | stats->nonprintable++; | |
76 | } | |
77 | } | |
78 | else | |
79 | stats->printable++; | |
80 | } | |
f9dd4bf4 DK |
81 | |
82 | /* If file ends with EOF then don't count this EOF as non-printable. */ | |
83 | if (size >= 1 && buf[size-1] == '\032') | |
84 | stats->nonprintable--; | |
6c510bee LT |
85 | } |
86 | ||
87 | /* | |
88 | * The same heuristics as diff.c::mmfile_is_binary() | |
a7630bd4 | 89 | * We treat files with bare CR as binary |
6c510bee | 90 | */ |
a7630bd4 | 91 | static int convert_is_binary(unsigned long size, const struct text_stat *stats) |
6c510bee | 92 | { |
6e336a53 | 93 | if (stats->lonecr) |
a7630bd4 | 94 | return 1; |
28624193 DP |
95 | if (stats->nul) |
96 | return 1; | |
6c510bee LT |
97 | if ((stats->printable >> 7) < stats->nonprintable) |
98 | return 1; | |
6c510bee LT |
99 | return 0; |
100 | } | |
101 | ||
a7630bd4 TB |
102 | static unsigned int gather_convert_stats(const char *data, unsigned long size) |
103 | { | |
104 | struct text_stat stats; | |
6e336a53 | 105 | int ret = 0; |
a7630bd4 TB |
106 | if (!data || !size) |
107 | return 0; | |
108 | gather_stats(data, size, &stats); | |
109 | if (convert_is_binary(size, &stats)) | |
6e336a53 TB |
110 | ret |= CONVERT_STAT_BITS_BIN; |
111 | if (stats.crlf) | |
112 | ret |= CONVERT_STAT_BITS_TXT_CRLF; | |
113 | if (stats.lonelf) | |
114 | ret |= CONVERT_STAT_BITS_TXT_LF; | |
115 | ||
116 | return ret; | |
a7630bd4 TB |
117 | } |
118 | ||
119 | static const char *gather_convert_stats_ascii(const char *data, unsigned long size) | |
120 | { | |
121 | unsigned int convert_stats = gather_convert_stats(data, size); | |
122 | ||
123 | if (convert_stats & CONVERT_STAT_BITS_BIN) | |
124 | return "-text"; | |
125 | switch (convert_stats) { | |
126 | case CONVERT_STAT_BITS_TXT_LF: | |
127 | return "lf"; | |
128 | case CONVERT_STAT_BITS_TXT_CRLF: | |
129 | return "crlf"; | |
130 | case CONVERT_STAT_BITS_TXT_LF | CONVERT_STAT_BITS_TXT_CRLF: | |
131 | return "mixed"; | |
132 | default: | |
133 | return "none"; | |
134 | } | |
135 | } | |
136 | ||
137 | const char *get_cached_convert_stats_ascii(const char *path) | |
138 | { | |
139 | const char *ret; | |
140 | unsigned long sz; | |
141 | void *data = read_blob_data_from_cache(path, &sz); | |
142 | ret = gather_convert_stats_ascii(data, sz); | |
143 | free(data); | |
144 | return ret; | |
145 | } | |
146 | ||
147 | const char *get_wt_convert_stats_ascii(const char *path) | |
148 | { | |
149 | const char *ret = ""; | |
150 | struct strbuf sb = STRBUF_INIT; | |
151 | if (strbuf_read_file(&sb, path, 0) >= 0) | |
152 | ret = gather_convert_stats_ascii(sb.buf, sb.len); | |
153 | strbuf_release(&sb); | |
154 | return ret; | |
155 | } | |
156 | ||
4b4024f5 TB |
157 | static int text_eol_is_crlf(void) |
158 | { | |
159 | if (auto_crlf == AUTO_CRLF_TRUE) | |
160 | return 1; | |
161 | else if (auto_crlf == AUTO_CRLF_INPUT) | |
162 | return 0; | |
163 | if (core_eol == EOL_CRLF) | |
164 | return 1; | |
165 | if (core_eol == EOL_UNSET && EOL_NATIVE == EOL_CRLF) | |
166 | return 1; | |
167 | return 0; | |
168 | } | |
169 | ||
c61dcff9 | 170 | static enum eol output_eol(enum crlf_action crlf_action) |
f217f0e8 | 171 | { |
c61dcff9 | 172 | switch (crlf_action) { |
942e7747 EB |
173 | case CRLF_BINARY: |
174 | return EOL_UNSET; | |
df747b81 | 175 | case CRLF_TEXT_CRLF: |
942e7747 | 176 | return EOL_CRLF; |
df747b81 | 177 | case CRLF_TEXT_INPUT: |
942e7747 | 178 | return EOL_LF; |
df747b81 TB |
179 | case CRLF_UNDEFINED: |
180 | case CRLF_AUTO_CRLF: | |
65237284 | 181 | return EOL_CRLF; |
df747b81 | 182 | case CRLF_AUTO_INPUT: |
65237284 | 183 | return EOL_LF; |
942e7747 EB |
184 | case CRLF_TEXT: |
185 | case CRLF_AUTO: | |
df747b81 | 186 | /* fall through */ |
4b4024f5 | 187 | return text_eol_is_crlf() ? EOL_CRLF : EOL_LF; |
942e7747 | 188 | } |
df747b81 | 189 | warning("Illegal crlf_action %d\n", (int)crlf_action); |
ec70f52f | 190 | return core_eol; |
942e7747 EB |
191 | } |
192 | ||
c61dcff9 | 193 | static void check_safe_crlf(const char *path, enum crlf_action crlf_action, |
a0ad53c1 TB |
194 | struct text_stat *old_stats, struct text_stat *new_stats, |
195 | enum safe_crlf checksafe) | |
21e5ad50 | 196 | { |
a0ad53c1 | 197 | if (old_stats->crlf && !new_stats->crlf ) { |
21e5ad50 | 198 | /* |
a0ad53c1 | 199 | * CRLFs would not be restored by checkout |
21e5ad50 | 200 | */ |
a0ad53c1 | 201 | if (checksafe == SAFE_CRLF_WARN) |
87cb7845 VA |
202 | warning(_("CRLF will be replaced by LF in %s.\n" |
203 | "The file will have its original line" | |
204 | " endings in your working directory."), path); | |
a0ad53c1 | 205 | else /* i.e. SAFE_CRLF_FAIL */ |
87cb7845 | 206 | die(_("CRLF would be replaced by LF in %s."), path); |
a0ad53c1 | 207 | } else if (old_stats->lonelf && !new_stats->lonelf ) { |
21e5ad50 | 208 | /* |
a0ad53c1 | 209 | * CRLFs would be added by checkout |
21e5ad50 | 210 | */ |
a0ad53c1 | 211 | if (checksafe == SAFE_CRLF_WARN) |
87cb7845 VA |
212 | warning(_("LF will be replaced by CRLF in %s.\n" |
213 | "The file will have its original line" | |
214 | " endings in your working directory."), path); | |
a0ad53c1 | 215 | else /* i.e. SAFE_CRLF_FAIL */ |
87cb7845 | 216 | die(_("LF would be replaced by CRLF in %s"), path); |
21e5ad50 SP |
217 | } |
218 | } | |
219 | ||
c4805393 FAG |
220 | static int has_cr_in_index(const char *path) |
221 | { | |
c4805393 | 222 | unsigned long sz; |
c4805393 FAG |
223 | void *data; |
224 | int has_cr; | |
c4805393 | 225 | |
4982fd78 LF |
226 | data = read_blob_data_from_cache(path, &sz); |
227 | if (!data) | |
c4805393 | 228 | return 0; |
c4805393 FAG |
229 | has_cr = memchr(data, '\r', sz) != NULL; |
230 | free(data); | |
231 | return has_cr; | |
232 | } | |
233 | ||
a0ad53c1 TB |
234 | static int will_convert_lf_to_crlf(size_t len, struct text_stat *stats, |
235 | enum crlf_action crlf_action) | |
236 | { | |
237 | if (output_eol(crlf_action) != EOL_CRLF) | |
238 | return 0; | |
239 | /* No "naked" LF? Nothing to convert, regardless. */ | |
240 | if (!stats->lonelf) | |
241 | return 0; | |
242 | ||
243 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { | |
244 | /* If we have any CR or CRLF line endings, we do not touch it */ | |
245 | /* This is the new safer autocrlf-handling */ | |
246 | if (stats->lonecr || stats->crlf) | |
247 | return 0; | |
248 | ||
249 | if (convert_is_binary(len, stats)) | |
250 | return 0; | |
251 | } | |
252 | return 1; | |
253 | ||
254 | } | |
255 | ||
5ecd293d | 256 | static int crlf_to_git(const char *path, const char *src, size_t len, |
c61dcff9 JH |
257 | struct strbuf *buf, |
258 | enum crlf_action crlf_action, enum safe_crlf checksafe) | |
6c510bee | 259 | { |
6c510bee | 260 | struct text_stat stats; |
5ecd293d | 261 | char *dst; |
a0ad53c1 | 262 | int convert_crlf_into_lf; |
6c510bee | 263 | |
c61dcff9 | 264 | if (crlf_action == CRLF_BINARY || |
4c3b57b9 | 265 | (src && !len)) |
5ecd293d | 266 | return 0; |
6c510bee | 267 | |
4c3b57b9 JK |
268 | /* |
269 | * If we are doing a dry-run and have no source buffer, there is | |
270 | * nothing to analyze; we must assume we would convert. | |
271 | */ | |
272 | if (!buf && !src) | |
273 | return 1; | |
274 | ||
5ecd293d | 275 | gather_stats(src, len, &stats); |
a0ad53c1 TB |
276 | /* Optimization: No CRLF? Nothing to convert, regardless. */ |
277 | convert_crlf_into_lf = !!stats.crlf; | |
6c510bee | 278 | |
df747b81 | 279 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { |
a7630bd4 | 280 | if (convert_is_binary(len, &stats)) |
5ecd293d | 281 | return 0; |
65237284 | 282 | /* |
1c25d2d8 TB |
283 | * If the file in the index has any CR in it, do not |
284 | * convert. This is the new safer autocrlf handling, | |
285 | * unless we want to renormalize in a merge or | |
286 | * cherry-pick. | |
65237284 | 287 | */ |
1c25d2d8 | 288 | if ((checksafe != SAFE_CRLF_RENORMALIZE) && has_cr_in_index(path)) |
a0ad53c1 | 289 | convert_crlf_into_lf = 0; |
201ac8ef | 290 | } |
1c25d2d8 TB |
291 | if ((checksafe == SAFE_CRLF_WARN || |
292 | (checksafe == SAFE_CRLF_FAIL)) && len) { | |
a0ad53c1 TB |
293 | struct text_stat new_stats; |
294 | memcpy(&new_stats, &stats, sizeof(new_stats)); | |
295 | /* simulate "git add" */ | |
296 | if (convert_crlf_into_lf) { | |
297 | new_stats.lonelf += new_stats.crlf; | |
298 | new_stats.crlf = 0; | |
299 | } | |
300 | /* simulate "git checkout" */ | |
301 | if (will_convert_lf_to_crlf(len, &new_stats, crlf_action)) { | |
302 | new_stats.crlf += new_stats.lonelf; | |
303 | new_stats.lonelf = 0; | |
304 | } | |
305 | check_safe_crlf(path, crlf_action, &stats, &new_stats, checksafe); | |
306 | } | |
307 | if (!convert_crlf_into_lf) | |
21e5ad50 SP |
308 | return 0; |
309 | ||
92ac3197 JK |
310 | /* |
311 | * At this point all of our source analysis is done, and we are sure we | |
312 | * would convert. If we are in dry-run mode, we can give an answer. | |
313 | */ | |
314 | if (!buf) | |
315 | return 1; | |
316 | ||
90d16ec0 PH |
317 | /* only grow if not in place */ |
318 | if (strbuf_avail(buf) + buf->len < len) | |
319 | strbuf_grow(buf, len - buf->len); | |
5ecd293d | 320 | dst = buf->buf; |
df747b81 | 321 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { |
163b9591 JH |
322 | /* |
323 | * If we guessed, we already know we rejected a file with | |
324 | * lone CR, and we can strip a CR without looking at what | |
325 | * follow it. | |
326 | */ | |
201ac8ef | 327 | do { |
ac78e548 | 328 | unsigned char c = *src++; |
201ac8ef | 329 | if (c != '\r') |
ac78e548 | 330 | *dst++ = c; |
5ecd293d | 331 | } while (--len); |
201ac8ef JH |
332 | } else { |
333 | do { | |
ac78e548 | 334 | unsigned char c = *src++; |
5ecd293d | 335 | if (! (c == '\r' && (1 < len && *src == '\n'))) |
ac78e548 | 336 | *dst++ = c; |
5ecd293d | 337 | } while (--len); |
201ac8ef | 338 | } |
5ecd293d PH |
339 | strbuf_setlen(buf, dst - buf->buf); |
340 | return 1; | |
6c510bee LT |
341 | } |
342 | ||
5ecd293d | 343 | static int crlf_to_worktree(const char *path, const char *src, size_t len, |
c61dcff9 | 344 | struct strbuf *buf, enum crlf_action crlf_action) |
6c510bee | 345 | { |
5ecd293d | 346 | char *to_free = NULL; |
6c510bee | 347 | struct text_stat stats; |
6c510bee | 348 | |
c61dcff9 | 349 | if (!len || output_eol(crlf_action) != EOL_CRLF) |
5ecd293d | 350 | return 0; |
6c510bee | 351 | |
5ecd293d | 352 | gather_stats(src, len, &stats); |
a0ad53c1 | 353 | if (!will_convert_lf_to_crlf(len, &stats, crlf_action)) |
5ecd293d | 354 | return 0; |
6c510bee | 355 | |
5ecd293d PH |
356 | /* are we "faking" in place editing ? */ |
357 | if (src == buf->buf) | |
b315c5c0 | 358 | to_free = strbuf_detach(buf, NULL); |
5ecd293d | 359 | |
6e336a53 | 360 | strbuf_grow(buf, len + stats.lonelf); |
5ecd293d PH |
361 | for (;;) { |
362 | const char *nl = memchr(src, '\n', len); | |
363 | if (!nl) | |
364 | break; | |
365 | if (nl > src && nl[-1] == '\r') { | |
366 | strbuf_add(buf, src, nl + 1 - src); | |
367 | } else { | |
368 | strbuf_add(buf, src, nl - src); | |
369 | strbuf_addstr(buf, "\r\n"); | |
370 | } | |
371 | len -= nl + 1 - src; | |
372 | src = nl + 1; | |
373 | } | |
374 | strbuf_add(buf, src, len); | |
375 | ||
376 | free(to_free); | |
377 | return 1; | |
6c510bee | 378 | } |
35ebfd6a | 379 | |
546bb582 JS |
380 | struct filter_params { |
381 | const char *src; | |
382 | unsigned long size; | |
9035d75a | 383 | int fd; |
546bb582 | 384 | const char *cmd; |
a2b665de | 385 | const char *path; |
546bb582 JS |
386 | }; |
387 | ||
9035d75a | 388 | static int filter_buffer_or_fd(int in, int out, void *data) |
aa4ed402 JH |
389 | { |
390 | /* | |
391 | * Spawn cmd and feed the buffer contents through its stdin. | |
392 | */ | |
d3180279 | 393 | struct child_process child_process = CHILD_PROCESS_INIT; |
546bb582 | 394 | struct filter_params *params = (struct filter_params *)data; |
aa4ed402 | 395 | int write_err, status; |
66dbfd55 GV |
396 | const char *argv[] = { NULL, NULL }; |
397 | ||
a2b665de PW |
398 | /* apply % substitution to cmd */ |
399 | struct strbuf cmd = STRBUF_INIT; | |
400 | struct strbuf path = STRBUF_INIT; | |
401 | struct strbuf_expand_dict_entry dict[] = { | |
402 | { "f", NULL, }, | |
403 | { NULL, NULL, }, | |
404 | }; | |
405 | ||
406 | /* quote the path to preserve spaces, etc. */ | |
407 | sq_quote_buf(&path, params->path); | |
408 | dict[0].value = path.buf; | |
409 | ||
410 | /* expand all %f with the quoted path */ | |
411 | strbuf_expand(&cmd, params->cmd, strbuf_expand_dict_cb, &dict); | |
412 | strbuf_release(&path); | |
413 | ||
414 | argv[0] = cmd.buf; | |
aa4ed402 | 415 | |
dc1bfdcd | 416 | child_process.argv = argv; |
ac0ba18d | 417 | child_process.use_shell = 1; |
dc1bfdcd | 418 | child_process.in = -1; |
ae6a5609 | 419 | child_process.out = out; |
aa4ed402 | 420 | |
dc1bfdcd | 421 | if (start_command(&child_process)) |
255f04d6 | 422 | return error("cannot fork to run external filter '%s'", params->cmd); |
aa4ed402 | 423 | |
6424c2ad JB |
424 | sigchain_push(SIGPIPE, SIG_IGN); |
425 | ||
9035d75a | 426 | if (params->src) { |
0c4dd67a JH |
427 | write_err = (write_in_full(child_process.in, |
428 | params->src, params->size) < 0); | |
429 | if (errno == EPIPE) | |
430 | write_err = 0; | |
9035d75a SP |
431 | } else { |
432 | write_err = copy_fd(params->fd, child_process.in); | |
0c4dd67a JH |
433 | if (write_err == COPY_WRITE_ERROR && errno == EPIPE) |
434 | write_err = 0; | |
9035d75a SP |
435 | } |
436 | ||
dc1bfdcd | 437 | if (close(child_process.in)) |
aa4ed402 JH |
438 | write_err = 1; |
439 | if (write_err) | |
255f04d6 | 440 | error("cannot feed the input to external filter '%s'", params->cmd); |
aa4ed402 | 441 | |
6424c2ad JB |
442 | sigchain_pop(SIGPIPE); |
443 | ||
aa4ed402 JH |
444 | status = finish_command(&child_process); |
445 | if (status) | |
255f04d6 | 446 | error("external filter '%s' failed %d", params->cmd, status); |
a2b665de PW |
447 | |
448 | strbuf_release(&cmd); | |
aa4ed402 JH |
449 | return (write_err || status); |
450 | } | |
451 | ||
234fa07e | 452 | static int apply_single_file_filter(const char *path, const char *src, size_t len, int fd, |
5ecd293d | 453 | struct strbuf *dst, const char *cmd) |
aa4ed402 JH |
454 | { |
455 | /* | |
456 | * Create a pipeline to have the command filter the buffer's | |
457 | * contents. | |
458 | * | |
459 | * (child --> cmd) --> us | |
460 | */ | |
b84be553 | 461 | int err = 0; |
f285a2d7 | 462 | struct strbuf nbuf = STRBUF_INIT; |
546bb582 JS |
463 | struct async async; |
464 | struct filter_params params; | |
aa4ed402 | 465 | |
546bb582 | 466 | memset(&async, 0, sizeof(async)); |
9035d75a | 467 | async.proc = filter_buffer_or_fd; |
546bb582 | 468 | async.data = ¶ms; |
ae6a5609 | 469 | async.out = -1; |
546bb582 JS |
470 | params.src = src; |
471 | params.size = len; | |
9035d75a | 472 | params.fd = fd; |
546bb582 | 473 | params.cmd = cmd; |
a2b665de | 474 | params.path = path; |
aa4ed402 JH |
475 | |
476 | fflush(NULL); | |
546bb582 JS |
477 | if (start_async(&async)) |
478 | return 0; /* error was already reported */ | |
aa4ed402 | 479 | |
546bb582 | 480 | if (strbuf_read(&nbuf, async.out, len) < 0) { |
b84be553 | 481 | err = error("read from external filter '%s' failed", cmd); |
aa4ed402 | 482 | } |
546bb582 | 483 | if (close(async.out)) { |
b84be553 | 484 | err = error("read from external filter '%s' failed", cmd); |
aa4ed402 | 485 | } |
546bb582 | 486 | if (finish_async(&async)) { |
b84be553 | 487 | err = error("external filter '%s' failed", cmd); |
aa4ed402 JH |
488 | } |
489 | ||
b84be553 | 490 | if (!err) { |
90d16ec0 | 491 | strbuf_swap(dst, &nbuf); |
5ecd293d | 492 | } |
90d16ec0 | 493 | strbuf_release(&nbuf); |
b84be553 | 494 | return !err; |
aa4ed402 JH |
495 | } |
496 | ||
234fa07e LS |
497 | #define CAP_CLEAN (1u<<0) |
498 | #define CAP_SMUDGE (1u<<1) | |
499 | ||
1b0b46ee BP |
500 | struct cmd2process { |
501 | struct subprocess_entry subprocess; /* must be the first member! */ | |
502 | unsigned int supported_capabilities; | |
503 | }; | |
504 | ||
f514d7d1 BP |
505 | static int subprocess_map_initialized; |
506 | static struct hashmap subprocess_map; | |
edcc8581 | 507 | |
7ddb9b2c | 508 | static int start_multi_file_filter_fn(struct subprocess_entry *subprocess) |
edcc8581 LS |
509 | { |
510 | int err; | |
7ddb9b2c | 511 | struct cmd2process *entry = (struct cmd2process *)subprocess; |
edcc8581 LS |
512 | struct string_list cap_list = STRING_LIST_INIT_NODUP; |
513 | char *cap_buf; | |
514 | const char *cap_name; | |
7ddb9b2c BP |
515 | struct child_process *process = &subprocess->process; |
516 | const char *cmd = subprocess->cmd; | |
edcc8581 LS |
517 | |
518 | sigchain_push(SIGPIPE, SIG_IGN); | |
519 | ||
c0c70f7a | 520 | err = packet_writel(process->in, "git-filter-client", "version=2", NULL); |
edcc8581 LS |
521 | if (err) |
522 | goto done; | |
523 | ||
524 | err = strcmp(packet_read_line(process->out, NULL), "git-filter-server"); | |
525 | if (err) { | |
526 | error("external filter '%s' does not support filter protocol version 2", cmd); | |
527 | goto done; | |
528 | } | |
529 | err = strcmp(packet_read_line(process->out, NULL), "version=2"); | |
530 | if (err) | |
531 | goto done; | |
532 | err = packet_read_line(process->out, NULL) != NULL; | |
533 | if (err) | |
534 | goto done; | |
535 | ||
c0c70f7a | 536 | err = packet_writel(process->in, "capability=clean", "capability=smudge", NULL); |
edcc8581 LS |
537 | |
538 | for (;;) { | |
539 | cap_buf = packet_read_line(process->out, NULL); | |
540 | if (!cap_buf) | |
541 | break; | |
542 | string_list_split_in_place(&cap_list, cap_buf, '=', 1); | |
543 | ||
544 | if (cap_list.nr != 2 || strcmp(cap_list.items[0].string, "capability")) | |
545 | continue; | |
546 | ||
547 | cap_name = cap_list.items[1].string; | |
548 | if (!strcmp(cap_name, "clean")) { | |
549 | entry->supported_capabilities |= CAP_CLEAN; | |
550 | } else if (!strcmp(cap_name, "smudge")) { | |
551 | entry->supported_capabilities |= CAP_SMUDGE; | |
552 | } else { | |
553 | warning( | |
554 | "external filter '%s' requested unsupported filter capability '%s'", | |
555 | cmd, cap_name | |
556 | ); | |
557 | } | |
558 | ||
559 | string_list_clear(&cap_list, 0); | |
560 | } | |
561 | ||
562 | done: | |
563 | sigchain_pop(SIGPIPE); | |
564 | ||
a810ea99 BP |
565 | return err; |
566 | } | |
567 | ||
edcc8581 LS |
568 | static int apply_multi_file_filter(const char *path, const char *src, size_t len, |
569 | int fd, struct strbuf *dst, const char *cmd, | |
570 | const unsigned int wanted_capability) | |
571 | { | |
572 | int err; | |
573 | struct cmd2process *entry; | |
574 | struct child_process *process; | |
575 | struct strbuf nbuf = STRBUF_INIT; | |
576 | struct strbuf filter_status = STRBUF_INIT; | |
577 | const char *filter_type; | |
578 | ||
f514d7d1 BP |
579 | if (!subprocess_map_initialized) { |
580 | subprocess_map_initialized = 1; | |
581 | hashmap_init(&subprocess_map, (hashmap_cmp_fn) cmd2process_cmp, 0); | |
edcc8581 LS |
582 | entry = NULL; |
583 | } else { | |
f514d7d1 | 584 | entry = (struct cmd2process *)subprocess_find_entry(&subprocess_map, cmd); |
edcc8581 LS |
585 | } |
586 | ||
587 | fflush(NULL); | |
588 | ||
589 | if (!entry) { | |
7ddb9b2c BP |
590 | entry = xmalloc(sizeof(*entry)); |
591 | entry->supported_capabilities = 0; | |
592 | ||
f514d7d1 | 593 | if (subprocess_start(&subprocess_map, &entry->subprocess, cmd, start_multi_file_filter_fn)) { |
7ddb9b2c | 594 | free(entry); |
edcc8581 | 595 | return 0; |
7ddb9b2c | 596 | } |
edcc8581 | 597 | } |
1b0b46ee | 598 | process = &entry->subprocess.process; |
edcc8581 LS |
599 | |
600 | if (!(wanted_capability & entry->supported_capabilities)) | |
601 | return 0; | |
602 | ||
603 | if (CAP_CLEAN & wanted_capability) | |
604 | filter_type = "clean"; | |
605 | else if (CAP_SMUDGE & wanted_capability) | |
606 | filter_type = "smudge"; | |
607 | else | |
608 | die("unexpected filter type"); | |
609 | ||
610 | sigchain_push(SIGPIPE, SIG_IGN); | |
611 | ||
612 | assert(strlen(filter_type) < LARGE_PACKET_DATA_MAX - strlen("command=\n")); | |
613 | err = packet_write_fmt_gently(process->in, "command=%s\n", filter_type); | |
614 | if (err) | |
615 | goto done; | |
616 | ||
617 | err = strlen(path) > LARGE_PACKET_DATA_MAX - strlen("pathname=\n"); | |
618 | if (err) { | |
619 | error("path name too long for external filter"); | |
620 | goto done; | |
621 | } | |
622 | ||
623 | err = packet_write_fmt_gently(process->in, "pathname=%s\n", path); | |
624 | if (err) | |
625 | goto done; | |
626 | ||
627 | err = packet_flush_gently(process->in); | |
628 | if (err) | |
629 | goto done; | |
630 | ||
631 | if (fd >= 0) | |
632 | err = write_packetized_from_fd(fd, process->in); | |
633 | else | |
634 | err = write_packetized_from_buf(src, len, process->in); | |
635 | if (err) | |
636 | goto done; | |
637 | ||
4f2a2e9f BP |
638 | err = subprocess_read_status(process->out, &filter_status); |
639 | if (err) | |
640 | goto done; | |
641 | ||
edcc8581 LS |
642 | err = strcmp(filter_status.buf, "success"); |
643 | if (err) | |
644 | goto done; | |
645 | ||
646 | err = read_packetized_to_strbuf(process->out, &nbuf) < 0; | |
647 | if (err) | |
648 | goto done; | |
649 | ||
4f2a2e9f BP |
650 | err = subprocess_read_status(process->out, &filter_status); |
651 | if (err) | |
652 | goto done; | |
653 | ||
edcc8581 LS |
654 | err = strcmp(filter_status.buf, "success"); |
655 | ||
656 | done: | |
657 | sigchain_pop(SIGPIPE); | |
658 | ||
070e5f72 | 659 | if (err) { |
edcc8581 LS |
660 | if (!strcmp(filter_status.buf, "error")) { |
661 | /* The filter signaled a problem with the file. */ | |
662 | } else if (!strcmp(filter_status.buf, "abort")) { | |
663 | /* | |
664 | * The filter signaled a permanent problem. Don't try to filter | |
665 | * files with the same command for the lifetime of the current | |
666 | * Git process. | |
667 | */ | |
668 | entry->supported_capabilities &= ~wanted_capability; | |
669 | } else { | |
670 | /* | |
671 | * Something went wrong with the protocol filter. | |
672 | * Force shutdown and restart if another blob requires filtering. | |
673 | */ | |
674 | error("external filter '%s' failed", cmd); | |
f514d7d1 | 675 | subprocess_stop(&subprocess_map, &entry->subprocess); |
7ddb9b2c | 676 | free(entry); |
edcc8581 LS |
677 | } |
678 | } else { | |
679 | strbuf_swap(dst, &nbuf); | |
680 | } | |
681 | strbuf_release(&nbuf); | |
682 | return !err; | |
aa4ed402 JH |
683 | } |
684 | ||
685 | static struct convert_driver { | |
686 | const char *name; | |
687 | struct convert_driver *next; | |
cd8be6c9 BH |
688 | const char *smudge; |
689 | const char *clean; | |
edcc8581 | 690 | const char *process; |
36daaaca | 691 | int required; |
aa4ed402 JH |
692 | } *user_convert, **user_convert_tail; |
693 | ||
234fa07e LS |
694 | static int apply_filter(const char *path, const char *src, size_t len, |
695 | int fd, struct strbuf *dst, struct convert_driver *drv, | |
696 | const unsigned int wanted_capability) | |
697 | { | |
698 | const char *cmd = NULL; | |
699 | ||
700 | if (!drv) | |
701 | return 0; | |
702 | ||
703 | if (!dst) | |
704 | return 1; | |
705 | ||
edcc8581 | 706 | if ((CAP_CLEAN & wanted_capability) && !drv->process && drv->clean) |
234fa07e | 707 | cmd = drv->clean; |
edcc8581 | 708 | else if ((CAP_SMUDGE & wanted_capability) && !drv->process && drv->smudge) |
234fa07e LS |
709 | cmd = drv->smudge; |
710 | ||
711 | if (cmd && *cmd) | |
712 | return apply_single_file_filter(path, src, len, fd, dst, cmd); | |
edcc8581 LS |
713 | else if (drv->process && *drv->process) |
714 | return apply_multi_file_filter(path, src, len, fd, dst, drv->process, wanted_capability); | |
234fa07e LS |
715 | |
716 | return 0; | |
717 | } | |
718 | ||
ef90d6d4 | 719 | static int read_convert_config(const char *var, const char *value, void *cb) |
aa4ed402 | 720 | { |
d731f0ad | 721 | const char *key, *name; |
aa4ed402 JH |
722 | int namelen; |
723 | struct convert_driver *drv; | |
724 | ||
725 | /* | |
726 | * External conversion drivers are configured using | |
727 | * "filter.<name>.variable". | |
728 | */ | |
d731f0ad | 729 | if (parse_config_key(var, "filter", &name, &namelen, &key) < 0 || !name) |
aa4ed402 | 730 | return 0; |
aa4ed402 JH |
731 | for (drv = user_convert; drv; drv = drv->next) |
732 | if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) | |
733 | break; | |
734 | if (!drv) { | |
aa4ed402 | 735 | drv = xcalloc(1, sizeof(struct convert_driver)); |
182af834 | 736 | drv->name = xmemdupz(name, namelen); |
aa4ed402 JH |
737 | *user_convert_tail = drv; |
738 | user_convert_tail = &(drv->next); | |
739 | } | |
740 | ||
aa4ed402 JH |
741 | /* |
742 | * filter.<name>.smudge and filter.<name>.clean specifies | |
743 | * the command line: | |
744 | * | |
745 | * command-line | |
746 | * | |
747 | * The command-line will not be interpolated in any way. | |
748 | */ | |
749 | ||
d731f0ad | 750 | if (!strcmp("smudge", key)) |
cd8be6c9 BH |
751 | return git_config_string(&drv->smudge, var, value); |
752 | ||
d731f0ad | 753 | if (!strcmp("clean", key)) |
cd8be6c9 | 754 | return git_config_string(&drv->clean, var, value); |
aa4ed402 | 755 | |
edcc8581 LS |
756 | if (!strcmp("process", key)) |
757 | return git_config_string(&drv->process, var, value); | |
758 | ||
d731f0ad | 759 | if (!strcmp("required", key)) { |
36daaaca JB |
760 | drv->required = git_config_bool(var, value); |
761 | return 0; | |
762 | } | |
763 | ||
aa4ed402 JH |
764 | return 0; |
765 | } | |
766 | ||
3fed15f5 JH |
767 | static int count_ident(const char *cp, unsigned long size) |
768 | { | |
769 | /* | |
af9b54bb | 770 | * "$Id: 0000000000000000000000000000000000000000 $" <=> "$Id$" |
3fed15f5 JH |
771 | */ |
772 | int cnt = 0; | |
773 | char ch; | |
774 | ||
775 | while (size) { | |
776 | ch = *cp++; | |
777 | size--; | |
778 | if (ch != '$') | |
779 | continue; | |
af9b54bb | 780 | if (size < 3) |
3fed15f5 | 781 | break; |
af9b54bb | 782 | if (memcmp("Id", cp, 2)) |
3fed15f5 | 783 | continue; |
af9b54bb AP |
784 | ch = cp[2]; |
785 | cp += 3; | |
786 | size -= 3; | |
3fed15f5 | 787 | if (ch == '$') |
af9b54bb | 788 | cnt++; /* $Id$ */ |
3fed15f5 JH |
789 | if (ch != ':') |
790 | continue; | |
791 | ||
792 | /* | |
af9b54bb | 793 | * "$Id: ... "; scan up to the closing dollar sign and discard. |
3fed15f5 JH |
794 | */ |
795 | while (size) { | |
796 | ch = *cp++; | |
797 | size--; | |
798 | if (ch == '$') { | |
799 | cnt++; | |
800 | break; | |
801 | } | |
a9f3049f HG |
802 | if (ch == '\n') |
803 | break; | |
3fed15f5 JH |
804 | } |
805 | } | |
806 | return cnt; | |
807 | } | |
808 | ||
5ecd293d PH |
809 | static int ident_to_git(const char *path, const char *src, size_t len, |
810 | struct strbuf *buf, int ident) | |
3fed15f5 | 811 | { |
5ecd293d | 812 | char *dst, *dollar; |
3fed15f5 | 813 | |
4c3b57b9 | 814 | if (!ident || (src && !count_ident(src, len))) |
5ecd293d PH |
815 | return 0; |
816 | ||
92ac3197 JK |
817 | if (!buf) |
818 | return 1; | |
819 | ||
90d16ec0 PH |
820 | /* only grow if not in place */ |
821 | if (strbuf_avail(buf) + buf->len < len) | |
822 | strbuf_grow(buf, len - buf->len); | |
5ecd293d PH |
823 | dst = buf->buf; |
824 | for (;;) { | |
825 | dollar = memchr(src, '$', len); | |
826 | if (!dollar) | |
827 | break; | |
77321184 | 828 | memmove(dst, src, dollar + 1 - src); |
5ecd293d PH |
829 | dst += dollar + 1 - src; |
830 | len -= dollar + 1 - src; | |
831 | src = dollar + 1; | |
832 | ||
833 | if (len > 3 && !memcmp(src, "Id:", 3)) { | |
834 | dollar = memchr(src + 3, '$', len - 3); | |
835 | if (!dollar) | |
836 | break; | |
a9f3049f HG |
837 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
838 | /* Line break before the next dollar. */ | |
839 | continue; | |
840 | } | |
841 | ||
af9b54bb AP |
842 | memcpy(dst, "Id$", 3); |
843 | dst += 3; | |
5ecd293d PH |
844 | len -= dollar + 1 - src; |
845 | src = dollar + 1; | |
3fed15f5 JH |
846 | } |
847 | } | |
77321184 | 848 | memmove(dst, src, len); |
5ecd293d PH |
849 | strbuf_setlen(buf, dst + len - buf->buf); |
850 | return 1; | |
3fed15f5 JH |
851 | } |
852 | ||
5ecd293d PH |
853 | static int ident_to_worktree(const char *path, const char *src, size_t len, |
854 | struct strbuf *buf, int ident) | |
3fed15f5 | 855 | { |
3fed15f5 | 856 | unsigned char sha1[20]; |
07814d90 | 857 | char *to_free = NULL, *dollar, *spc; |
5ecd293d | 858 | int cnt; |
3fed15f5 JH |
859 | |
860 | if (!ident) | |
5ecd293d | 861 | return 0; |
3fed15f5 | 862 | |
5ecd293d | 863 | cnt = count_ident(src, len); |
3fed15f5 | 864 | if (!cnt) |
5ecd293d | 865 | return 0; |
3fed15f5 | 866 | |
5ecd293d PH |
867 | /* are we "faking" in place editing ? */ |
868 | if (src == buf->buf) | |
b315c5c0 | 869 | to_free = strbuf_detach(buf, NULL); |
5ecd293d | 870 | hash_sha1_file(src, len, "blob", sha1); |
3fed15f5 | 871 | |
5ecd293d PH |
872 | strbuf_grow(buf, len + cnt * 43); |
873 | for (;;) { | |
874 | /* step 1: run to the next '$' */ | |
875 | dollar = memchr(src, '$', len); | |
876 | if (!dollar) | |
877 | break; | |
878 | strbuf_add(buf, src, dollar + 1 - src); | |
879 | len -= dollar + 1 - src; | |
880 | src = dollar + 1; | |
c23290d5 | 881 | |
5ecd293d PH |
882 | /* step 2: does it looks like a bit like Id:xxx$ or Id$ ? */ |
883 | if (len < 3 || memcmp("Id", src, 2)) | |
3fed15f5 JH |
884 | continue; |
885 | ||
5ecd293d PH |
886 | /* step 3: skip over Id$ or Id:xxxxx$ */ |
887 | if (src[2] == '$') { | |
888 | src += 3; | |
889 | len -= 3; | |
890 | } else if (src[2] == ':') { | |
891 | /* | |
892 | * It's possible that an expanded Id has crept its way into the | |
07814d90 HG |
893 | * repository, we cope with that by stripping the expansion out. |
894 | * This is probably not a good idea, since it will cause changes | |
895 | * on checkout, which won't go away by stash, but let's keep it | |
896 | * for git-style ids. | |
5ecd293d PH |
897 | */ |
898 | dollar = memchr(src + 3, '$', len - 3); | |
899 | if (!dollar) { | |
900 | /* incomplete keyword, no more '$', so just quit the loop */ | |
901 | break; | |
902 | } | |
c23290d5 | 903 | |
a9f3049f HG |
904 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
905 | /* Line break before the next dollar. */ | |
906 | continue; | |
907 | } | |
908 | ||
07814d90 HG |
909 | spc = memchr(src + 4, ' ', dollar - src - 4); |
910 | if (spc && spc < dollar-1) { | |
911 | /* There are spaces in unexpected places. | |
912 | * This is probably an id from some other | |
913 | * versioning system. Keep it for now. | |
914 | */ | |
915 | continue; | |
916 | } | |
917 | ||
5ecd293d PH |
918 | len -= dollar + 1 - src; |
919 | src = dollar + 1; | |
920 | } else { | |
921 | /* it wasn't a "Id$" or "Id:xxxx$" */ | |
922 | continue; | |
923 | } | |
c23290d5 | 924 | |
5ecd293d PH |
925 | /* step 4: substitute */ |
926 | strbuf_addstr(buf, "Id: "); | |
927 | strbuf_add(buf, sha1_to_hex(sha1), 40); | |
928 | strbuf_addstr(buf, " $"); | |
3fed15f5 | 929 | } |
5ecd293d | 930 | strbuf_add(buf, src, len); |
3fed15f5 | 931 | |
5ecd293d PH |
932 | free(to_free); |
933 | return 1; | |
35ebfd6a JH |
934 | } |
935 | ||
7bd18054 | 936 | static enum crlf_action git_path_check_crlf(struct attr_check_item *check) |
35ebfd6a | 937 | { |
6073ee85 JH |
938 | const char *value = check->value; |
939 | ||
940 | if (ATTR_TRUE(value)) | |
941 | return CRLF_TEXT; | |
942 | else if (ATTR_FALSE(value)) | |
943 | return CRLF_BINARY; | |
944 | else if (ATTR_UNSET(value)) | |
945 | ; | |
946 | else if (!strcmp(value, "input")) | |
df747b81 | 947 | return CRLF_TEXT_INPUT; |
fd6cce9e EB |
948 | else if (!strcmp(value, "auto")) |
949 | return CRLF_AUTO; | |
df747b81 | 950 | return CRLF_UNDEFINED; |
35ebfd6a JH |
951 | } |
952 | ||
7bd18054 | 953 | static enum eol git_path_check_eol(struct attr_check_item *check) |
fd6cce9e EB |
954 | { |
955 | const char *value = check->value; | |
956 | ||
957 | if (ATTR_UNSET(value)) | |
958 | ; | |
959 | else if (!strcmp(value, "lf")) | |
960 | return EOL_LF; | |
961 | else if (!strcmp(value, "crlf")) | |
962 | return EOL_CRLF; | |
963 | return EOL_UNSET; | |
964 | } | |
965 | ||
7bd18054 | 966 | static struct convert_driver *git_path_check_convert(struct attr_check_item *check) |
aa4ed402 JH |
967 | { |
968 | const char *value = check->value; | |
969 | struct convert_driver *drv; | |
970 | ||
971 | if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) | |
972 | return NULL; | |
973 | for (drv = user_convert; drv; drv = drv->next) | |
974 | if (!strcmp(value, drv->name)) | |
975 | return drv; | |
976 | return NULL; | |
977 | } | |
978 | ||
7bd18054 | 979 | static int git_path_check_ident(struct attr_check_item *check) |
3fed15f5 JH |
980 | { |
981 | const char *value = check->value; | |
982 | ||
983 | return !!ATTR_TRUE(value); | |
984 | } | |
985 | ||
3bfba20d JH |
986 | struct conv_attrs { |
987 | struct convert_driver *drv; | |
bb211b4d TB |
988 | enum crlf_action attr_action; /* What attr says */ |
989 | enum crlf_action crlf_action; /* When no attr is set, use core.autocrlf */ | |
3bfba20d JH |
990 | int ident; |
991 | }; | |
992 | ||
3bfba20d | 993 | static void convert_attrs(struct conv_attrs *ca, const char *path) |
83295964 | 994 | { |
2aef63d3 | 995 | static struct attr_check *check; |
83295964 | 996 | |
2aef63d3 JH |
997 | if (!check) { |
998 | check = attr_check_initl("crlf", "ident", "filter", | |
999 | "eol", "text", NULL); | |
83295964 JH |
1000 | user_convert_tail = &user_convert; |
1001 | git_config(read_convert_config, NULL); | |
1002 | } | |
3bfba20d | 1003 | |
2aef63d3 JH |
1004 | if (!git_check_attr(path, check)) { |
1005 | struct attr_check_item *ccheck = check->items; | |
bb211b4d | 1006 | ca->crlf_action = git_path_check_crlf(ccheck + 4); |
df747b81 | 1007 | if (ca->crlf_action == CRLF_UNDEFINED) |
92cce135 | 1008 | ca->crlf_action = git_path_check_crlf(ccheck + 0); |
bb211b4d | 1009 | ca->attr_action = ca->crlf_action; |
92cce135 TB |
1010 | ca->ident = git_path_check_ident(ccheck + 1); |
1011 | ca->drv = git_path_check_convert(ccheck + 2); | |
817a0c79 TB |
1012 | if (ca->crlf_action != CRLF_BINARY) { |
1013 | enum eol eol_attr = git_path_check_eol(ccheck + 3); | |
65237284 TB |
1014 | if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_LF) |
1015 | ca->crlf_action = CRLF_AUTO_INPUT; | |
1016 | else if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_CRLF) | |
1017 | ca->crlf_action = CRLF_AUTO_CRLF; | |
1018 | else if (eol_attr == EOL_LF) | |
817a0c79 TB |
1019 | ca->crlf_action = CRLF_TEXT_INPUT; |
1020 | else if (eol_attr == EOL_CRLF) | |
1021 | ca->crlf_action = CRLF_TEXT_CRLF; | |
1022 | } | |
1023 | ca->attr_action = ca->crlf_action; | |
3bfba20d JH |
1024 | } else { |
1025 | ca->drv = NULL; | |
df747b81 | 1026 | ca->crlf_action = CRLF_UNDEFINED; |
3bfba20d JH |
1027 | ca->ident = 0; |
1028 | } | |
df747b81 TB |
1029 | if (ca->crlf_action == CRLF_TEXT) |
1030 | ca->crlf_action = text_eol_is_crlf() ? CRLF_TEXT_CRLF : CRLF_TEXT_INPUT; | |
1031 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_FALSE) | |
1032 | ca->crlf_action = CRLF_BINARY; | |
1033 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_TRUE) | |
1034 | ca->crlf_action = CRLF_AUTO_CRLF; | |
1035 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_INPUT) | |
1036 | ca->crlf_action = CRLF_AUTO_INPUT; | |
83295964 JH |
1037 | } |
1038 | ||
9035d75a SP |
1039 | int would_convert_to_git_filter_fd(const char *path) |
1040 | { | |
1041 | struct conv_attrs ca; | |
1042 | ||
1043 | convert_attrs(&ca, path); | |
1044 | if (!ca.drv) | |
1045 | return 0; | |
1046 | ||
1047 | /* | |
1048 | * Apply a filter to an fd only if the filter is required to succeed. | |
1049 | * We must die if the filter fails, because the original data before | |
1050 | * filtering is not available. | |
1051 | */ | |
1052 | if (!ca.drv->required) | |
1053 | return 0; | |
1054 | ||
234fa07e | 1055 | return apply_filter(path, NULL, 0, -1, NULL, ca.drv, CAP_CLEAN); |
9035d75a SP |
1056 | } |
1057 | ||
a7630bd4 TB |
1058 | const char *get_convert_attr_ascii(const char *path) |
1059 | { | |
1060 | struct conv_attrs ca; | |
a7630bd4 TB |
1061 | |
1062 | convert_attrs(&ca, path); | |
bb211b4d | 1063 | switch (ca.attr_action) { |
df747b81 | 1064 | case CRLF_UNDEFINED: |
a7630bd4 TB |
1065 | return ""; |
1066 | case CRLF_BINARY: | |
1067 | return "-text"; | |
1068 | case CRLF_TEXT: | |
1069 | return "text"; | |
df747b81 | 1070 | case CRLF_TEXT_INPUT: |
a7630bd4 | 1071 | return "text eol=lf"; |
df747b81 TB |
1072 | case CRLF_TEXT_CRLF: |
1073 | return "text eol=crlf"; | |
a7630bd4 TB |
1074 | case CRLF_AUTO: |
1075 | return "text=auto"; | |
df747b81 | 1076 | case CRLF_AUTO_CRLF: |
65237284 | 1077 | return "text=auto eol=crlf"; |
df747b81 | 1078 | case CRLF_AUTO_INPUT: |
65237284 | 1079 | return "text=auto eol=lf"; |
a7630bd4 TB |
1080 | } |
1081 | return ""; | |
1082 | } | |
1083 | ||
21e5ad50 SP |
1084 | int convert_to_git(const char *path, const char *src, size_t len, |
1085 | struct strbuf *dst, enum safe_crlf checksafe) | |
35ebfd6a | 1086 | { |
3bfba20d | 1087 | int ret = 0; |
3bfba20d | 1088 | struct conv_attrs ca; |
6073ee85 | 1089 | |
3bfba20d | 1090 | convert_attrs(&ca, path); |
3fed15f5 | 1091 | |
234fa07e LS |
1092 | ret |= apply_filter(path, src, len, -1, dst, ca.drv, CAP_CLEAN); |
1093 | if (!ret && ca.drv && ca.drv->required) | |
36daaaca JB |
1094 | die("%s: clean filter '%s' failed", path, ca.drv->name); |
1095 | ||
92ac3197 | 1096 | if (ret && dst) { |
5ecd293d PH |
1097 | src = dst->buf; |
1098 | len = dst->len; | |
aa4ed402 | 1099 | } |
3bfba20d | 1100 | ret |= crlf_to_git(path, src, len, dst, ca.crlf_action, checksafe); |
92ac3197 | 1101 | if (ret && dst) { |
5ecd293d PH |
1102 | src = dst->buf; |
1103 | len = dst->len; | |
6073ee85 | 1104 | } |
3bfba20d | 1105 | return ret | ident_to_git(path, src, len, dst, ca.ident); |
35ebfd6a JH |
1106 | } |
1107 | ||
9035d75a SP |
1108 | void convert_to_git_filter_fd(const char *path, int fd, struct strbuf *dst, |
1109 | enum safe_crlf checksafe) | |
1110 | { | |
1111 | struct conv_attrs ca; | |
1112 | convert_attrs(&ca, path); | |
1113 | ||
1114 | assert(ca.drv); | |
edcc8581 | 1115 | assert(ca.drv->clean || ca.drv->process); |
9035d75a | 1116 | |
234fa07e | 1117 | if (!apply_filter(path, NULL, 0, fd, dst, ca.drv, CAP_CLEAN)) |
9035d75a SP |
1118 | die("%s: clean filter '%s' failed", path, ca.drv->name); |
1119 | ||
9035d75a SP |
1120 | crlf_to_git(path, dst->buf, dst->len, dst, ca.crlf_action, checksafe); |
1121 | ident_to_git(path, dst->buf, dst->len, dst, ca.ident); | |
1122 | } | |
1123 | ||
43dd2332 EB |
1124 | static int convert_to_working_tree_internal(const char *path, const char *src, |
1125 | size_t len, struct strbuf *dst, | |
1126 | int normalizing) | |
35ebfd6a | 1127 | { |
36daaaca | 1128 | int ret = 0, ret_filter = 0; |
3bfba20d | 1129 | struct conv_attrs ca; |
6073ee85 | 1130 | |
3bfba20d | 1131 | convert_attrs(&ca, path); |
3fed15f5 | 1132 | |
3bfba20d | 1133 | ret |= ident_to_worktree(path, src, len, dst, ca.ident); |
5ecd293d PH |
1134 | if (ret) { |
1135 | src = dst->buf; | |
1136 | len = dst->len; | |
3fed15f5 | 1137 | } |
43dd2332 EB |
1138 | /* |
1139 | * CRLF conversion can be skipped if normalizing, unless there | |
edcc8581 LS |
1140 | * is a smudge or process filter (even if the process filter doesn't |
1141 | * support smudge). The filters might expect CRLFs. | |
43dd2332 | 1142 | */ |
edcc8581 | 1143 | if ((ca.drv && (ca.drv->smudge || ca.drv->process)) || !normalizing) { |
3bfba20d | 1144 | ret |= crlf_to_worktree(path, src, len, dst, ca.crlf_action); |
43dd2332 EB |
1145 | if (ret) { |
1146 | src = dst->buf; | |
1147 | len = dst->len; | |
1148 | } | |
aa4ed402 | 1149 | } |
36daaaca | 1150 | |
234fa07e LS |
1151 | ret_filter = apply_filter(path, src, len, -1, dst, ca.drv, CAP_SMUDGE); |
1152 | if (!ret_filter && ca.drv && ca.drv->required) | |
36daaaca JB |
1153 | die("%s: smudge filter %s failed", path, ca.drv->name); |
1154 | ||
1155 | return ret | ret_filter; | |
35ebfd6a | 1156 | } |
f217f0e8 | 1157 | |
43dd2332 EB |
1158 | int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst) |
1159 | { | |
1160 | return convert_to_working_tree_internal(path, src, len, dst, 0); | |
1161 | } | |
1162 | ||
f217f0e8 EB |
1163 | int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst) |
1164 | { | |
43dd2332 | 1165 | int ret = convert_to_working_tree_internal(path, src, len, dst, 1); |
f217f0e8 EB |
1166 | if (ret) { |
1167 | src = dst->buf; | |
1168 | len = dst->len; | |
1169 | } | |
65237284 | 1170 | return ret | convert_to_git(path, src, len, dst, SAFE_CRLF_RENORMALIZE); |
f217f0e8 | 1171 | } |
dd8e9121 | 1172 | |
b6691092 JH |
1173 | /***************************************************************** |
1174 | * | |
749f763d | 1175 | * Streaming conversion support |
b6691092 JH |
1176 | * |
1177 | *****************************************************************/ | |
1178 | ||
1179 | typedef int (*filter_fn)(struct stream_filter *, | |
1180 | const char *input, size_t *isize_p, | |
1181 | char *output, size_t *osize_p); | |
1182 | typedef void (*free_fn)(struct stream_filter *); | |
1183 | ||
1184 | struct stream_filter_vtbl { | |
1185 | filter_fn filter; | |
1186 | free_fn free; | |
1187 | }; | |
1188 | ||
1189 | struct stream_filter { | |
1190 | struct stream_filter_vtbl *vtbl; | |
1191 | }; | |
1192 | ||
1193 | static int null_filter_fn(struct stream_filter *filter, | |
1194 | const char *input, size_t *isize_p, | |
1195 | char *output, size_t *osize_p) | |
1196 | { | |
4ae66704 JH |
1197 | size_t count; |
1198 | ||
1199 | if (!input) | |
1200 | return 0; /* we do not keep any states */ | |
1201 | count = *isize_p; | |
b6691092 JH |
1202 | if (*osize_p < count) |
1203 | count = *osize_p; | |
1204 | if (count) { | |
1205 | memmove(output, input, count); | |
1206 | *isize_p -= count; | |
1207 | *osize_p -= count; | |
1208 | } | |
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | static void null_free_fn(struct stream_filter *filter) | |
1213 | { | |
1214 | ; /* nothing -- null instances are shared */ | |
1215 | } | |
1216 | ||
1217 | static struct stream_filter_vtbl null_vtbl = { | |
1218 | null_filter_fn, | |
1219 | null_free_fn, | |
1220 | }; | |
1221 | ||
1222 | static struct stream_filter null_filter_singleton = { | |
1223 | &null_vtbl, | |
1224 | }; | |
1225 | ||
1226 | int is_null_stream_filter(struct stream_filter *filter) | |
1227 | { | |
1228 | return filter == &null_filter_singleton; | |
1229 | } | |
1230 | ||
b84c7839 JH |
1231 | |
1232 | /* | |
1233 | * LF-to-CRLF filter | |
1234 | */ | |
284e3d28 CMN |
1235 | |
1236 | struct lf_to_crlf_filter { | |
1237 | struct stream_filter filter; | |
8496f568 JH |
1238 | unsigned has_held:1; |
1239 | char held; | |
284e3d28 CMN |
1240 | }; |
1241 | ||
e322ee38 JH |
1242 | static int lf_to_crlf_filter_fn(struct stream_filter *filter, |
1243 | const char *input, size_t *isize_p, | |
1244 | char *output, size_t *osize_p) | |
1245 | { | |
284e3d28 CMN |
1246 | size_t count, o = 0; |
1247 | struct lf_to_crlf_filter *lf_to_crlf = (struct lf_to_crlf_filter *)filter; | |
1248 | ||
8496f568 JH |
1249 | /* |
1250 | * We may be holding onto the CR to see if it is followed by a | |
1251 | * LF, in which case we would need to go to the main loop. | |
1252 | * Otherwise, just emit it to the output stream. | |
1253 | */ | |
1254 | if (lf_to_crlf->has_held && (lf_to_crlf->held != '\r' || !input)) { | |
1255 | output[o++] = lf_to_crlf->held; | |
1256 | lf_to_crlf->has_held = 0; | |
284e3d28 | 1257 | } |
e322ee38 | 1258 | |
87afe9a5 JH |
1259 | /* We are told to drain */ |
1260 | if (!input) { | |
1261 | *osize_p -= o; | |
1262 | return 0; | |
1263 | } | |
e322ee38 | 1264 | |
e322ee38 | 1265 | count = *isize_p; |
8496f568 | 1266 | if (count || lf_to_crlf->has_held) { |
284e3d28 | 1267 | size_t i; |
8496f568 JH |
1268 | int was_cr = 0; |
1269 | ||
1270 | if (lf_to_crlf->has_held) { | |
1271 | was_cr = 1; | |
1272 | lf_to_crlf->has_held = 0; | |
1273 | } | |
1274 | ||
284e3d28 | 1275 | for (i = 0; o < *osize_p && i < count; i++) { |
e322ee38 | 1276 | char ch = input[i]; |
8496f568 | 1277 | |
e322ee38 | 1278 | if (ch == '\n') { |
284e3d28 | 1279 | output[o++] = '\r'; |
8496f568 JH |
1280 | } else if (was_cr) { |
1281 | /* | |
1282 | * Previous round saw CR and it is not followed | |
1283 | * by a LF; emit the CR before processing the | |
1284 | * current character. | |
1285 | */ | |
1286 | output[o++] = '\r'; | |
e322ee38 | 1287 | } |
8496f568 JH |
1288 | |
1289 | /* | |
1290 | * We may have consumed the last output slot, | |
1291 | * in which case we need to break out of this | |
1292 | * loop; hold the current character before | |
1293 | * returning. | |
1294 | */ | |
1295 | if (*osize_p <= o) { | |
1296 | lf_to_crlf->has_held = 1; | |
1297 | lf_to_crlf->held = ch; | |
1298 | continue; /* break but increment i */ | |
1299 | } | |
1300 | ||
1301 | if (ch == '\r') { | |
1302 | was_cr = 1; | |
1303 | continue; | |
1304 | } | |
1305 | ||
1306 | was_cr = 0; | |
e322ee38 JH |
1307 | output[o++] = ch; |
1308 | } | |
1309 | ||
1310 | *osize_p -= o; | |
1311 | *isize_p -= i; | |
8496f568 JH |
1312 | |
1313 | if (!lf_to_crlf->has_held && was_cr) { | |
1314 | lf_to_crlf->has_held = 1; | |
1315 | lf_to_crlf->held = '\r'; | |
1316 | } | |
e322ee38 JH |
1317 | } |
1318 | return 0; | |
1319 | } | |
1320 | ||
284e3d28 CMN |
1321 | static void lf_to_crlf_free_fn(struct stream_filter *filter) |
1322 | { | |
1323 | free(filter); | |
1324 | } | |
1325 | ||
e322ee38 JH |
1326 | static struct stream_filter_vtbl lf_to_crlf_vtbl = { |
1327 | lf_to_crlf_filter_fn, | |
284e3d28 | 1328 | lf_to_crlf_free_fn, |
e322ee38 JH |
1329 | }; |
1330 | ||
284e3d28 CMN |
1331 | static struct stream_filter *lf_to_crlf_filter(void) |
1332 | { | |
87afe9a5 | 1333 | struct lf_to_crlf_filter *lf_to_crlf = xcalloc(1, sizeof(*lf_to_crlf)); |
e322ee38 | 1334 | |
284e3d28 | 1335 | lf_to_crlf->filter.vtbl = &lf_to_crlf_vtbl; |
284e3d28 CMN |
1336 | return (struct stream_filter *)lf_to_crlf; |
1337 | } | |
b84c7839 | 1338 | |
a265a7f9 JH |
1339 | /* |
1340 | * Cascade filter | |
1341 | */ | |
1342 | #define FILTER_BUFFER 1024 | |
1343 | struct cascade_filter { | |
1344 | struct stream_filter filter; | |
1345 | struct stream_filter *one; | |
1346 | struct stream_filter *two; | |
1347 | char buf[FILTER_BUFFER]; | |
1348 | int end, ptr; | |
1349 | }; | |
1350 | ||
1351 | static int cascade_filter_fn(struct stream_filter *filter, | |
1352 | const char *input, size_t *isize_p, | |
1353 | char *output, size_t *osize_p) | |
1354 | { | |
1355 | struct cascade_filter *cas = (struct cascade_filter *) filter; | |
1356 | size_t filled = 0; | |
1357 | size_t sz = *osize_p; | |
1358 | size_t to_feed, remaining; | |
1359 | ||
1360 | /* | |
1361 | * input -- (one) --> buf -- (two) --> output | |
1362 | */ | |
1363 | while (filled < sz) { | |
1364 | remaining = sz - filled; | |
1365 | ||
1366 | /* do we already have something to feed two with? */ | |
1367 | if (cas->ptr < cas->end) { | |
1368 | to_feed = cas->end - cas->ptr; | |
1369 | if (stream_filter(cas->two, | |
1370 | cas->buf + cas->ptr, &to_feed, | |
1371 | output + filled, &remaining)) | |
1372 | return -1; | |
1373 | cas->ptr += (cas->end - cas->ptr) - to_feed; | |
1374 | filled = sz - remaining; | |
1375 | continue; | |
1376 | } | |
1377 | ||
1378 | /* feed one from upstream and have it emit into our buffer */ | |
1379 | to_feed = input ? *isize_p : 0; | |
1380 | if (input && !to_feed) | |
1381 | break; | |
1382 | remaining = sizeof(cas->buf); | |
1383 | if (stream_filter(cas->one, | |
1384 | input, &to_feed, | |
1385 | cas->buf, &remaining)) | |
1386 | return -1; | |
1387 | cas->end = sizeof(cas->buf) - remaining; | |
1388 | cas->ptr = 0; | |
1389 | if (input) { | |
1390 | size_t fed = *isize_p - to_feed; | |
1391 | *isize_p -= fed; | |
1392 | input += fed; | |
1393 | } | |
1394 | ||
1395 | /* do we know that we drained one completely? */ | |
1396 | if (input || cas->end) | |
1397 | continue; | |
1398 | ||
1399 | /* tell two to drain; we have nothing more to give it */ | |
1400 | to_feed = 0; | |
1401 | remaining = sz - filled; | |
1402 | if (stream_filter(cas->two, | |
1403 | NULL, &to_feed, | |
1404 | output + filled, &remaining)) | |
1405 | return -1; | |
1406 | if (remaining == (sz - filled)) | |
1407 | break; /* completely drained two */ | |
1408 | filled = sz - remaining; | |
1409 | } | |
1410 | *osize_p -= filled; | |
1411 | return 0; | |
1412 | } | |
1413 | ||
1414 | static void cascade_free_fn(struct stream_filter *filter) | |
1415 | { | |
1416 | struct cascade_filter *cas = (struct cascade_filter *)filter; | |
1417 | free_stream_filter(cas->one); | |
1418 | free_stream_filter(cas->two); | |
1419 | free(filter); | |
1420 | } | |
1421 | ||
1422 | static struct stream_filter_vtbl cascade_vtbl = { | |
1423 | cascade_filter_fn, | |
1424 | cascade_free_fn, | |
1425 | }; | |
1426 | ||
1427 | static struct stream_filter *cascade_filter(struct stream_filter *one, | |
1428 | struct stream_filter *two) | |
1429 | { | |
1430 | struct cascade_filter *cascade; | |
1431 | ||
1432 | if (!one || is_null_stream_filter(one)) | |
1433 | return two; | |
1434 | if (!two || is_null_stream_filter(two)) | |
1435 | return one; | |
1436 | ||
1437 | cascade = xmalloc(sizeof(*cascade)); | |
1438 | cascade->one = one; | |
1439 | cascade->two = two; | |
1440 | cascade->end = cascade->ptr = 0; | |
1441 | cascade->filter.vtbl = &cascade_vtbl; | |
1442 | return (struct stream_filter *)cascade; | |
1443 | } | |
1444 | ||
b84c7839 JH |
1445 | /* |
1446 | * ident filter | |
1447 | */ | |
1448 | #define IDENT_DRAINING (-1) | |
1449 | #define IDENT_SKIPPING (-2) | |
1450 | struct ident_filter { | |
1451 | struct stream_filter filter; | |
1452 | struct strbuf left; | |
1453 | int state; | |
1454 | char ident[45]; /* ": x40 $" */ | |
1455 | }; | |
1456 | ||
1457 | static int is_foreign_ident(const char *str) | |
1458 | { | |
1459 | int i; | |
1460 | ||
ae021d87 | 1461 | if (!skip_prefix(str, "$Id: ", &str)) |
b84c7839 | 1462 | return 0; |
ae021d87 | 1463 | for (i = 0; str[i]; i++) { |
b84c7839 JH |
1464 | if (isspace(str[i]) && str[i+1] != '$') |
1465 | return 1; | |
1466 | } | |
1467 | return 0; | |
1468 | } | |
1469 | ||
1470 | static void ident_drain(struct ident_filter *ident, char **output_p, size_t *osize_p) | |
1471 | { | |
1472 | size_t to_drain = ident->left.len; | |
1473 | ||
1474 | if (*osize_p < to_drain) | |
1475 | to_drain = *osize_p; | |
1476 | if (to_drain) { | |
1477 | memcpy(*output_p, ident->left.buf, to_drain); | |
1478 | strbuf_remove(&ident->left, 0, to_drain); | |
1479 | *output_p += to_drain; | |
1480 | *osize_p -= to_drain; | |
1481 | } | |
1482 | if (!ident->left.len) | |
1483 | ident->state = 0; | |
1484 | } | |
1485 | ||
1486 | static int ident_filter_fn(struct stream_filter *filter, | |
1487 | const char *input, size_t *isize_p, | |
1488 | char *output, size_t *osize_p) | |
1489 | { | |
1490 | struct ident_filter *ident = (struct ident_filter *)filter; | |
1491 | static const char head[] = "$Id"; | |
1492 | ||
1493 | if (!input) { | |
1494 | /* drain upon eof */ | |
1495 | switch (ident->state) { | |
1496 | default: | |
1497 | strbuf_add(&ident->left, head, ident->state); | |
1498 | case IDENT_SKIPPING: | |
1499 | /* fallthru */ | |
1500 | case IDENT_DRAINING: | |
1501 | ident_drain(ident, &output, osize_p); | |
1502 | } | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | while (*isize_p || (ident->state == IDENT_DRAINING)) { | |
1507 | int ch; | |
1508 | ||
1509 | if (ident->state == IDENT_DRAINING) { | |
1510 | ident_drain(ident, &output, osize_p); | |
1511 | if (!*osize_p) | |
1512 | break; | |
1513 | continue; | |
1514 | } | |
1515 | ||
1516 | ch = *(input++); | |
1517 | (*isize_p)--; | |
1518 | ||
1519 | if (ident->state == IDENT_SKIPPING) { | |
1520 | /* | |
1521 | * Skipping until '$' or LF, but keeping them | |
1522 | * in case it is a foreign ident. | |
1523 | */ | |
1524 | strbuf_addch(&ident->left, ch); | |
1525 | if (ch != '\n' && ch != '$') | |
1526 | continue; | |
1527 | if (ch == '$' && !is_foreign_ident(ident->left.buf)) { | |
1528 | strbuf_setlen(&ident->left, sizeof(head) - 1); | |
1529 | strbuf_addstr(&ident->left, ident->ident); | |
1530 | } | |
1531 | ident->state = IDENT_DRAINING; | |
1532 | continue; | |
1533 | } | |
1534 | ||
1535 | if (ident->state < sizeof(head) && | |
1536 | head[ident->state] == ch) { | |
1537 | ident->state++; | |
1538 | continue; | |
1539 | } | |
1540 | ||
1541 | if (ident->state) | |
1542 | strbuf_add(&ident->left, head, ident->state); | |
1543 | if (ident->state == sizeof(head) - 1) { | |
1544 | if (ch != ':' && ch != '$') { | |
1545 | strbuf_addch(&ident->left, ch); | |
1546 | ident->state = 0; | |
1547 | continue; | |
1548 | } | |
1549 | ||
1550 | if (ch == ':') { | |
1551 | strbuf_addch(&ident->left, ch); | |
1552 | ident->state = IDENT_SKIPPING; | |
1553 | } else { | |
1554 | strbuf_addstr(&ident->left, ident->ident); | |
1555 | ident->state = IDENT_DRAINING; | |
1556 | } | |
1557 | continue; | |
1558 | } | |
1559 | ||
1560 | strbuf_addch(&ident->left, ch); | |
1561 | ident->state = IDENT_DRAINING; | |
1562 | } | |
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | static void ident_free_fn(struct stream_filter *filter) | |
1567 | { | |
1568 | struct ident_filter *ident = (struct ident_filter *)filter; | |
1569 | strbuf_release(&ident->left); | |
1570 | free(filter); | |
1571 | } | |
1572 | ||
1573 | static struct stream_filter_vtbl ident_vtbl = { | |
1574 | ident_filter_fn, | |
1575 | ident_free_fn, | |
1576 | }; | |
1577 | ||
1578 | static struct stream_filter *ident_filter(const unsigned char *sha1) | |
1579 | { | |
1580 | struct ident_filter *ident = xmalloc(sizeof(*ident)); | |
1581 | ||
5096d490 JK |
1582 | xsnprintf(ident->ident, sizeof(ident->ident), |
1583 | ": %s $", sha1_to_hex(sha1)); | |
b84c7839 JH |
1584 | strbuf_init(&ident->left, 0); |
1585 | ident->filter.vtbl = &ident_vtbl; | |
1586 | ident->state = 0; | |
1587 | return (struct stream_filter *)ident; | |
1588 | } | |
1589 | ||
dd8e9121 | 1590 | /* |
b6691092 JH |
1591 | * Return an appropriately constructed filter for the path, or NULL if |
1592 | * the contents cannot be filtered without reading the whole thing | |
1593 | * in-core. | |
1594 | * | |
1595 | * Note that you would be crazy to set CRLF, smuge/clean or ident to a | |
1596 | * large binary blob you would want us not to slurp into the memory! | |
dd8e9121 | 1597 | */ |
b6691092 | 1598 | struct stream_filter *get_stream_filter(const char *path, const unsigned char *sha1) |
dd8e9121 JH |
1599 | { |
1600 | struct conv_attrs ca; | |
b84c7839 | 1601 | struct stream_filter *filter = NULL; |
dd8e9121 JH |
1602 | |
1603 | convert_attrs(&ca, path); | |
edcc8581 | 1604 | if (ca.drv && (ca.drv->process || ca.drv->smudge || ca.drv->clean)) |
caa47adc TB |
1605 | return NULL; |
1606 | ||
1607 | if (ca.crlf_action == CRLF_AUTO || ca.crlf_action == CRLF_AUTO_CRLF) | |
1608 | return NULL; | |
b84c7839 JH |
1609 | |
1610 | if (ca.ident) | |
1611 | filter = ident_filter(sha1); | |
dd8e9121 | 1612 | |
caa47adc | 1613 | if (output_eol(ca.crlf_action) == EOL_CRLF) |
284e3d28 | 1614 | filter = cascade_filter(filter, lf_to_crlf_filter()); |
caa47adc TB |
1615 | else |
1616 | filter = cascade_filter(filter, &null_filter_singleton); | |
e322ee38 | 1617 | |
b84c7839 | 1618 | return filter; |
b6691092 JH |
1619 | } |
1620 | ||
1621 | void free_stream_filter(struct stream_filter *filter) | |
1622 | { | |
1623 | filter->vtbl->free(filter); | |
1624 | } | |
1625 | ||
1626 | int stream_filter(struct stream_filter *filter, | |
1627 | const char *input, size_t *isize_p, | |
1628 | char *output, size_t *osize_p) | |
1629 | { | |
1630 | return filter->vtbl->filter(filter, input, isize_p, output, osize_p); | |
dd8e9121 | 1631 | } |