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