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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" |
35ebfd6a | 7 | |
6c510bee LT |
8 | /* |
9 | * convert.c - convert a file when checking it out and checking it in. | |
10 | * | |
11 | * This should use the pathname to decide on whether it wants to do some | |
12 | * more interesting conversions (automatic gzip/unzip, general format | |
13 | * conversions etc etc), but by default it just does automatic CRLF<->LF | |
942e7747 | 14 | * translation when the "text" attribute or "auto_crlf" option is set. |
6c510bee LT |
15 | */ |
16 | ||
a7630bd4 TB |
17 | /* Stat bits: When BIN is set, the txt bits are unset */ |
18 | #define CONVERT_STAT_BITS_TXT_LF 0x1 | |
19 | #define CONVERT_STAT_BITS_TXT_CRLF 0x2 | |
20 | #define CONVERT_STAT_BITS_BIN 0x4 | |
21 | ||
c61dcff9 | 22 | enum crlf_action { |
df747b81 TB |
23 | CRLF_UNDEFINED, |
24 | CRLF_BINARY, | |
fd6cce9e | 25 | CRLF_TEXT, |
df747b81 TB |
26 | CRLF_TEXT_INPUT, |
27 | CRLF_TEXT_CRLF, | |
28 | CRLF_AUTO, | |
29 | CRLF_AUTO_INPUT, | |
30 | CRLF_AUTO_CRLF | |
fd6cce9e | 31 | }; |
163b9591 | 32 | |
6c510bee | 33 | struct text_stat { |
28624193 | 34 | /* NUL, CR, LF and CRLF counts */ |
6e336a53 | 35 | unsigned nul, lonecr, lonelf, crlf; |
6c510bee LT |
36 | |
37 | /* These are just approximations! */ | |
38 | unsigned printable, nonprintable; | |
39 | }; | |
40 | ||
41 | static void gather_stats(const char *buf, unsigned long size, struct text_stat *stats) | |
42 | { | |
43 | unsigned long i; | |
44 | ||
45 | memset(stats, 0, sizeof(*stats)); | |
46 | ||
47 | for (i = 0; i < size; i++) { | |
48 | unsigned char c = buf[i]; | |
49 | if (c == '\r') { | |
6e336a53 | 50 | if (i+1 < size && buf[i+1] == '\n') { |
6c510bee | 51 | stats->crlf++; |
6e336a53 TB |
52 | i++; |
53 | } else | |
54 | stats->lonecr++; | |
6c510bee LT |
55 | continue; |
56 | } | |
57 | if (c == '\n') { | |
6e336a53 | 58 | stats->lonelf++; |
6c510bee LT |
59 | continue; |
60 | } | |
61 | if (c == 127) | |
62 | /* DEL */ | |
63 | stats->nonprintable++; | |
64 | else if (c < 32) { | |
65 | switch (c) { | |
66 | /* BS, HT, ESC and FF */ | |
67 | case '\b': case '\t': case '\033': case '\014': | |
68 | stats->printable++; | |
69 | break; | |
28624193 DP |
70 | case 0: |
71 | stats->nul++; | |
72 | /* fall through */ | |
6c510bee LT |
73 | default: |
74 | stats->nonprintable++; | |
75 | } | |
76 | } | |
77 | else | |
78 | stats->printable++; | |
79 | } | |
f9dd4bf4 DK |
80 | |
81 | /* If file ends with EOF then don't count this EOF as non-printable. */ | |
82 | if (size >= 1 && buf[size-1] == '\032') | |
83 | stats->nonprintable--; | |
6c510bee LT |
84 | } |
85 | ||
86 | /* | |
87 | * The same heuristics as diff.c::mmfile_is_binary() | |
a7630bd4 | 88 | * We treat files with bare CR as binary |
6c510bee | 89 | */ |
a7630bd4 | 90 | static int convert_is_binary(unsigned long size, const struct text_stat *stats) |
6c510bee | 91 | { |
6e336a53 | 92 | if (stats->lonecr) |
a7630bd4 | 93 | return 1; |
28624193 DP |
94 | if (stats->nul) |
95 | return 1; | |
6c510bee LT |
96 | if ((stats->printable >> 7) < stats->nonprintable) |
97 | return 1; | |
6c510bee LT |
98 | return 0; |
99 | } | |
100 | ||
a7630bd4 TB |
101 | static unsigned int gather_convert_stats(const char *data, unsigned long size) |
102 | { | |
103 | struct text_stat stats; | |
6e336a53 | 104 | int ret = 0; |
a7630bd4 TB |
105 | if (!data || !size) |
106 | return 0; | |
107 | gather_stats(data, size, &stats); | |
108 | if (convert_is_binary(size, &stats)) | |
6e336a53 TB |
109 | ret |= CONVERT_STAT_BITS_BIN; |
110 | if (stats.crlf) | |
111 | ret |= CONVERT_STAT_BITS_TXT_CRLF; | |
112 | if (stats.lonelf) | |
113 | ret |= CONVERT_STAT_BITS_TXT_LF; | |
114 | ||
115 | return ret; | |
a7630bd4 TB |
116 | } |
117 | ||
118 | static const char *gather_convert_stats_ascii(const char *data, unsigned long size) | |
119 | { | |
120 | unsigned int convert_stats = gather_convert_stats(data, size); | |
121 | ||
122 | if (convert_stats & CONVERT_STAT_BITS_BIN) | |
123 | return "-text"; | |
124 | switch (convert_stats) { | |
125 | case CONVERT_STAT_BITS_TXT_LF: | |
126 | return "lf"; | |
127 | case CONVERT_STAT_BITS_TXT_CRLF: | |
128 | return "crlf"; | |
129 | case CONVERT_STAT_BITS_TXT_LF | CONVERT_STAT_BITS_TXT_CRLF: | |
130 | return "mixed"; | |
131 | default: | |
132 | return "none"; | |
133 | } | |
134 | } | |
135 | ||
136 | const char *get_cached_convert_stats_ascii(const char *path) | |
137 | { | |
138 | const char *ret; | |
139 | unsigned long sz; | |
140 | void *data = read_blob_data_from_cache(path, &sz); | |
141 | ret = gather_convert_stats_ascii(data, sz); | |
142 | free(data); | |
143 | return ret; | |
144 | } | |
145 | ||
146 | const char *get_wt_convert_stats_ascii(const char *path) | |
147 | { | |
148 | const char *ret = ""; | |
149 | struct strbuf sb = STRBUF_INIT; | |
150 | if (strbuf_read_file(&sb, path, 0) >= 0) | |
151 | ret = gather_convert_stats_ascii(sb.buf, sb.len); | |
152 | strbuf_release(&sb); | |
153 | return ret; | |
154 | } | |
155 | ||
4b4024f5 TB |
156 | static int text_eol_is_crlf(void) |
157 | { | |
158 | if (auto_crlf == AUTO_CRLF_TRUE) | |
159 | return 1; | |
160 | else if (auto_crlf == AUTO_CRLF_INPUT) | |
161 | return 0; | |
162 | if (core_eol == EOL_CRLF) | |
163 | return 1; | |
164 | if (core_eol == EOL_UNSET && EOL_NATIVE == EOL_CRLF) | |
165 | return 1; | |
166 | return 0; | |
167 | } | |
168 | ||
c61dcff9 | 169 | static enum eol output_eol(enum crlf_action crlf_action) |
f217f0e8 | 170 | { |
c61dcff9 | 171 | switch (crlf_action) { |
942e7747 EB |
172 | case CRLF_BINARY: |
173 | return EOL_UNSET; | |
df747b81 | 174 | case CRLF_TEXT_CRLF: |
942e7747 | 175 | return EOL_CRLF; |
df747b81 | 176 | case CRLF_TEXT_INPUT: |
942e7747 | 177 | return EOL_LF; |
df747b81 TB |
178 | case CRLF_UNDEFINED: |
179 | case CRLF_AUTO_CRLF: | |
65237284 | 180 | return EOL_CRLF; |
df747b81 | 181 | case CRLF_AUTO_INPUT: |
65237284 | 182 | return EOL_LF; |
942e7747 EB |
183 | case CRLF_TEXT: |
184 | case CRLF_AUTO: | |
df747b81 | 185 | /* fall through */ |
4b4024f5 | 186 | return text_eol_is_crlf() ? EOL_CRLF : EOL_LF; |
942e7747 | 187 | } |
df747b81 | 188 | warning("Illegal crlf_action %d\n", (int)crlf_action); |
ec70f52f | 189 | return core_eol; |
942e7747 EB |
190 | } |
191 | ||
c61dcff9 | 192 | static void check_safe_crlf(const char *path, enum crlf_action crlf_action, |
a0ad53c1 TB |
193 | struct text_stat *old_stats, struct text_stat *new_stats, |
194 | enum safe_crlf checksafe) | |
21e5ad50 | 195 | { |
a0ad53c1 | 196 | if (old_stats->crlf && !new_stats->crlf ) { |
21e5ad50 | 197 | /* |
a0ad53c1 | 198 | * CRLFs would not be restored by checkout |
21e5ad50 | 199 | */ |
a0ad53c1 | 200 | if (checksafe == SAFE_CRLF_WARN) |
87cb7845 VA |
201 | warning(_("CRLF will be replaced by LF in %s.\n" |
202 | "The file will have its original line" | |
203 | " endings in your working directory."), path); | |
a0ad53c1 | 204 | else /* i.e. SAFE_CRLF_FAIL */ |
87cb7845 | 205 | die(_("CRLF would be replaced by LF in %s."), path); |
a0ad53c1 | 206 | } else if (old_stats->lonelf && !new_stats->lonelf ) { |
21e5ad50 | 207 | /* |
a0ad53c1 | 208 | * CRLFs would be added by checkout |
21e5ad50 | 209 | */ |
a0ad53c1 | 210 | if (checksafe == SAFE_CRLF_WARN) |
87cb7845 VA |
211 | warning(_("LF will be replaced by CRLF in %s.\n" |
212 | "The file will have its original line" | |
213 | " endings in your working directory."), path); | |
a0ad53c1 | 214 | else /* i.e. SAFE_CRLF_FAIL */ |
87cb7845 | 215 | die(_("LF would be replaced by CRLF in %s"), path); |
21e5ad50 SP |
216 | } |
217 | } | |
218 | ||
c4805393 FAG |
219 | static int has_cr_in_index(const char *path) |
220 | { | |
c4805393 | 221 | unsigned long sz; |
c4805393 FAG |
222 | void *data; |
223 | int has_cr; | |
c4805393 | 224 | |
4982fd78 LF |
225 | data = read_blob_data_from_cache(path, &sz); |
226 | if (!data) | |
c4805393 | 227 | return 0; |
c4805393 FAG |
228 | has_cr = memchr(data, '\r', sz) != NULL; |
229 | free(data); | |
230 | return has_cr; | |
231 | } | |
232 | ||
a0ad53c1 TB |
233 | static int will_convert_lf_to_crlf(size_t len, struct text_stat *stats, |
234 | enum crlf_action crlf_action) | |
235 | { | |
236 | if (output_eol(crlf_action) != EOL_CRLF) | |
237 | return 0; | |
238 | /* No "naked" LF? Nothing to convert, regardless. */ | |
239 | if (!stats->lonelf) | |
240 | return 0; | |
241 | ||
242 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { | |
243 | /* If we have any CR or CRLF line endings, we do not touch it */ | |
244 | /* This is the new safer autocrlf-handling */ | |
245 | if (stats->lonecr || stats->crlf) | |
246 | return 0; | |
247 | ||
248 | if (convert_is_binary(len, stats)) | |
249 | return 0; | |
250 | } | |
251 | return 1; | |
252 | ||
253 | } | |
254 | ||
5ecd293d | 255 | static int crlf_to_git(const char *path, const char *src, size_t len, |
c61dcff9 JH |
256 | struct strbuf *buf, |
257 | enum crlf_action crlf_action, enum safe_crlf checksafe) | |
6c510bee | 258 | { |
6c510bee | 259 | struct text_stat stats; |
5ecd293d | 260 | char *dst; |
a0ad53c1 | 261 | int convert_crlf_into_lf; |
6c510bee | 262 | |
c61dcff9 | 263 | if (crlf_action == CRLF_BINARY || |
4c3b57b9 | 264 | (src && !len)) |
5ecd293d | 265 | return 0; |
6c510bee | 266 | |
4c3b57b9 JK |
267 | /* |
268 | * If we are doing a dry-run and have no source buffer, there is | |
269 | * nothing to analyze; we must assume we would convert. | |
270 | */ | |
271 | if (!buf && !src) | |
272 | return 1; | |
273 | ||
5ecd293d | 274 | gather_stats(src, len, &stats); |
a0ad53c1 TB |
275 | /* Optimization: No CRLF? Nothing to convert, regardless. */ |
276 | convert_crlf_into_lf = !!stats.crlf; | |
6c510bee | 277 | |
df747b81 | 278 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { |
a7630bd4 | 279 | if (convert_is_binary(len, &stats)) |
5ecd293d | 280 | return 0; |
65237284 | 281 | /* |
1c25d2d8 TB |
282 | * If the file in the index has any CR in it, do not |
283 | * convert. This is the new safer autocrlf handling, | |
284 | * unless we want to renormalize in a merge or | |
285 | * cherry-pick. | |
65237284 | 286 | */ |
1c25d2d8 | 287 | if ((checksafe != SAFE_CRLF_RENORMALIZE) && has_cr_in_index(path)) |
a0ad53c1 | 288 | convert_crlf_into_lf = 0; |
201ac8ef | 289 | } |
1c25d2d8 TB |
290 | if ((checksafe == SAFE_CRLF_WARN || |
291 | (checksafe == SAFE_CRLF_FAIL)) && len) { | |
a0ad53c1 TB |
292 | struct text_stat new_stats; |
293 | memcpy(&new_stats, &stats, sizeof(new_stats)); | |
294 | /* simulate "git add" */ | |
295 | if (convert_crlf_into_lf) { | |
296 | new_stats.lonelf += new_stats.crlf; | |
297 | new_stats.crlf = 0; | |
298 | } | |
299 | /* simulate "git checkout" */ | |
300 | if (will_convert_lf_to_crlf(len, &new_stats, crlf_action)) { | |
301 | new_stats.crlf += new_stats.lonelf; | |
302 | new_stats.lonelf = 0; | |
303 | } | |
304 | check_safe_crlf(path, crlf_action, &stats, &new_stats, checksafe); | |
305 | } | |
306 | if (!convert_crlf_into_lf) | |
21e5ad50 SP |
307 | return 0; |
308 | ||
92ac3197 JK |
309 | /* |
310 | * At this point all of our source analysis is done, and we are sure we | |
311 | * would convert. If we are in dry-run mode, we can give an answer. | |
312 | */ | |
313 | if (!buf) | |
314 | return 1; | |
315 | ||
90d16ec0 PH |
316 | /* only grow if not in place */ |
317 | if (strbuf_avail(buf) + buf->len < len) | |
318 | strbuf_grow(buf, len - buf->len); | |
5ecd293d | 319 | dst = buf->buf; |
df747b81 | 320 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_AUTO_INPUT || crlf_action == CRLF_AUTO_CRLF) { |
163b9591 JH |
321 | /* |
322 | * If we guessed, we already know we rejected a file with | |
323 | * lone CR, and we can strip a CR without looking at what | |
324 | * follow it. | |
325 | */ | |
201ac8ef | 326 | do { |
ac78e548 | 327 | unsigned char c = *src++; |
201ac8ef | 328 | if (c != '\r') |
ac78e548 | 329 | *dst++ = c; |
5ecd293d | 330 | } while (--len); |
201ac8ef JH |
331 | } else { |
332 | do { | |
ac78e548 | 333 | unsigned char c = *src++; |
5ecd293d | 334 | if (! (c == '\r' && (1 < len && *src == '\n'))) |
ac78e548 | 335 | *dst++ = c; |
5ecd293d | 336 | } while (--len); |
201ac8ef | 337 | } |
5ecd293d PH |
338 | strbuf_setlen(buf, dst - buf->buf); |
339 | return 1; | |
6c510bee LT |
340 | } |
341 | ||
5ecd293d | 342 | static int crlf_to_worktree(const char *path, const char *src, size_t len, |
c61dcff9 | 343 | struct strbuf *buf, enum crlf_action crlf_action) |
6c510bee | 344 | { |
5ecd293d | 345 | char *to_free = NULL; |
6c510bee | 346 | struct text_stat stats; |
6c510bee | 347 | |
c61dcff9 | 348 | if (!len || output_eol(crlf_action) != EOL_CRLF) |
5ecd293d | 349 | return 0; |
6c510bee | 350 | |
5ecd293d | 351 | gather_stats(src, len, &stats); |
a0ad53c1 | 352 | if (!will_convert_lf_to_crlf(len, &stats, crlf_action)) |
5ecd293d | 353 | return 0; |
6c510bee | 354 | |
5ecd293d PH |
355 | /* are we "faking" in place editing ? */ |
356 | if (src == buf->buf) | |
b315c5c0 | 357 | to_free = strbuf_detach(buf, NULL); |
5ecd293d | 358 | |
6e336a53 | 359 | strbuf_grow(buf, len + stats.lonelf); |
5ecd293d PH |
360 | for (;;) { |
361 | const char *nl = memchr(src, '\n', len); | |
362 | if (!nl) | |
363 | break; | |
364 | if (nl > src && nl[-1] == '\r') { | |
365 | strbuf_add(buf, src, nl + 1 - src); | |
366 | } else { | |
367 | strbuf_add(buf, src, nl - src); | |
368 | strbuf_addstr(buf, "\r\n"); | |
369 | } | |
370 | len -= nl + 1 - src; | |
371 | src = nl + 1; | |
372 | } | |
373 | strbuf_add(buf, src, len); | |
374 | ||
375 | free(to_free); | |
376 | return 1; | |
6c510bee | 377 | } |
35ebfd6a | 378 | |
546bb582 JS |
379 | struct filter_params { |
380 | const char *src; | |
381 | unsigned long size; | |
9035d75a | 382 | int fd; |
546bb582 | 383 | const char *cmd; |
a2b665de | 384 | const char *path; |
546bb582 JS |
385 | }; |
386 | ||
9035d75a | 387 | static int filter_buffer_or_fd(int in, int out, void *data) |
aa4ed402 JH |
388 | { |
389 | /* | |
390 | * Spawn cmd and feed the buffer contents through its stdin. | |
391 | */ | |
d3180279 | 392 | struct child_process child_process = CHILD_PROCESS_INIT; |
546bb582 | 393 | struct filter_params *params = (struct filter_params *)data; |
aa4ed402 | 394 | int write_err, status; |
66dbfd55 GV |
395 | const char *argv[] = { NULL, NULL }; |
396 | ||
a2b665de PW |
397 | /* apply % substitution to cmd */ |
398 | struct strbuf cmd = STRBUF_INIT; | |
399 | struct strbuf path = STRBUF_INIT; | |
400 | struct strbuf_expand_dict_entry dict[] = { | |
401 | { "f", NULL, }, | |
402 | { NULL, NULL, }, | |
403 | }; | |
404 | ||
405 | /* quote the path to preserve spaces, etc. */ | |
406 | sq_quote_buf(&path, params->path); | |
407 | dict[0].value = path.buf; | |
408 | ||
409 | /* expand all %f with the quoted path */ | |
410 | strbuf_expand(&cmd, params->cmd, strbuf_expand_dict_cb, &dict); | |
411 | strbuf_release(&path); | |
412 | ||
413 | argv[0] = cmd.buf; | |
aa4ed402 | 414 | |
dc1bfdcd | 415 | child_process.argv = argv; |
ac0ba18d | 416 | child_process.use_shell = 1; |
dc1bfdcd | 417 | child_process.in = -1; |
ae6a5609 | 418 | child_process.out = out; |
aa4ed402 | 419 | |
dc1bfdcd | 420 | if (start_command(&child_process)) |
255f04d6 | 421 | return error("cannot fork to run external filter '%s'", params->cmd); |
aa4ed402 | 422 | |
6424c2ad JB |
423 | sigchain_push(SIGPIPE, SIG_IGN); |
424 | ||
9035d75a | 425 | if (params->src) { |
0c4dd67a JH |
426 | write_err = (write_in_full(child_process.in, |
427 | params->src, params->size) < 0); | |
428 | if (errno == EPIPE) | |
429 | write_err = 0; | |
9035d75a SP |
430 | } else { |
431 | write_err = copy_fd(params->fd, child_process.in); | |
0c4dd67a JH |
432 | if (write_err == COPY_WRITE_ERROR && errno == EPIPE) |
433 | write_err = 0; | |
9035d75a SP |
434 | } |
435 | ||
dc1bfdcd | 436 | if (close(child_process.in)) |
aa4ed402 JH |
437 | write_err = 1; |
438 | if (write_err) | |
255f04d6 | 439 | error("cannot feed the input to external filter '%s'", params->cmd); |
aa4ed402 | 440 | |
6424c2ad JB |
441 | sigchain_pop(SIGPIPE); |
442 | ||
aa4ed402 JH |
443 | status = finish_command(&child_process); |
444 | if (status) | |
255f04d6 | 445 | error("external filter '%s' failed %d", params->cmd, status); |
a2b665de PW |
446 | |
447 | strbuf_release(&cmd); | |
aa4ed402 JH |
448 | return (write_err || status); |
449 | } | |
450 | ||
234fa07e | 451 | static int apply_single_file_filter(const char *path, const char *src, size_t len, int fd, |
5ecd293d | 452 | struct strbuf *dst, const char *cmd) |
aa4ed402 JH |
453 | { |
454 | /* | |
455 | * Create a pipeline to have the command filter the buffer's | |
456 | * contents. | |
457 | * | |
458 | * (child --> cmd) --> us | |
459 | */ | |
b84be553 | 460 | int err = 0; |
f285a2d7 | 461 | struct strbuf nbuf = STRBUF_INIT; |
546bb582 JS |
462 | struct async async; |
463 | struct filter_params params; | |
aa4ed402 | 464 | |
546bb582 | 465 | memset(&async, 0, sizeof(async)); |
9035d75a | 466 | async.proc = filter_buffer_or_fd; |
546bb582 | 467 | async.data = ¶ms; |
ae6a5609 | 468 | async.out = -1; |
546bb582 JS |
469 | params.src = src; |
470 | params.size = len; | |
9035d75a | 471 | params.fd = fd; |
546bb582 | 472 | params.cmd = cmd; |
a2b665de | 473 | params.path = path; |
aa4ed402 JH |
474 | |
475 | fflush(NULL); | |
546bb582 JS |
476 | if (start_async(&async)) |
477 | return 0; /* error was already reported */ | |
aa4ed402 | 478 | |
546bb582 | 479 | if (strbuf_read(&nbuf, async.out, len) < 0) { |
b84be553 | 480 | err = error("read from external filter '%s' failed", cmd); |
aa4ed402 | 481 | } |
546bb582 | 482 | if (close(async.out)) { |
b84be553 | 483 | err = error("read from external filter '%s' failed", cmd); |
aa4ed402 | 484 | } |
546bb582 | 485 | if (finish_async(&async)) { |
b84be553 | 486 | err = error("external filter '%s' failed", cmd); |
aa4ed402 JH |
487 | } |
488 | ||
b84be553 | 489 | if (!err) { |
90d16ec0 | 490 | strbuf_swap(dst, &nbuf); |
5ecd293d | 491 | } |
90d16ec0 | 492 | strbuf_release(&nbuf); |
b84be553 | 493 | return !err; |
aa4ed402 JH |
494 | } |
495 | ||
234fa07e LS |
496 | #define CAP_CLEAN (1u<<0) |
497 | #define CAP_SMUDGE (1u<<1) | |
498 | ||
edcc8581 LS |
499 | struct cmd2process { |
500 | struct hashmap_entry ent; /* must be the first member! */ | |
501 | unsigned int supported_capabilities; | |
502 | const char *cmd; | |
503 | struct child_process process; | |
504 | }; | |
505 | ||
506 | static int cmd_process_map_initialized; | |
507 | static struct hashmap cmd_process_map; | |
508 | ||
509 | static int cmd2process_cmp(const struct cmd2process *e1, | |
510 | const struct cmd2process *e2, | |
511 | const void *unused) | |
512 | { | |
513 | return strcmp(e1->cmd, e2->cmd); | |
514 | } | |
515 | ||
516 | static struct cmd2process *find_multi_file_filter_entry(struct hashmap *hashmap, const char *cmd) | |
517 | { | |
518 | struct cmd2process key; | |
519 | hashmap_entry_init(&key, strhash(cmd)); | |
520 | key.cmd = cmd; | |
521 | return hashmap_get(hashmap, &key, NULL); | |
522 | } | |
523 | ||
524 | static int packet_write_list(int fd, const char *line, ...) | |
525 | { | |
526 | va_list args; | |
527 | int err; | |
528 | va_start(args, line); | |
529 | for (;;) { | |
530 | if (!line) | |
531 | break; | |
532 | if (strlen(line) > LARGE_PACKET_DATA_MAX) | |
533 | return -1; | |
534 | err = packet_write_fmt_gently(fd, "%s\n", line); | |
535 | if (err) | |
536 | return err; | |
537 | line = va_arg(args, const char*); | |
538 | } | |
539 | va_end(args); | |
540 | return packet_flush_gently(fd); | |
541 | } | |
542 | ||
543 | static void read_multi_file_filter_status(int fd, struct strbuf *status) | |
544 | { | |
545 | struct strbuf **pair; | |
546 | char *line; | |
547 | for (;;) { | |
548 | line = packet_read_line(fd, NULL); | |
549 | if (!line) | |
550 | break; | |
551 | pair = strbuf_split_str(line, '=', 2); | |
552 | if (pair[0] && pair[0]->len && pair[1]) { | |
553 | /* the last "status=<foo>" line wins */ | |
554 | if (!strcmp(pair[0]->buf, "status=")) { | |
555 | strbuf_reset(status); | |
556 | strbuf_addbuf(status, pair[1]); | |
557 | } | |
558 | } | |
559 | strbuf_list_free(pair); | |
560 | } | |
561 | } | |
562 | ||
563 | static void kill_multi_file_filter(struct hashmap *hashmap, struct cmd2process *entry) | |
564 | { | |
565 | if (!entry) | |
566 | return; | |
567 | ||
568 | entry->process.clean_on_exit = 0; | |
569 | kill(entry->process.pid, SIGTERM); | |
570 | finish_command(&entry->process); | |
571 | ||
572 | hashmap_remove(hashmap, entry, NULL); | |
573 | free(entry); | |
574 | } | |
575 | ||
576 | static void stop_multi_file_filter(struct child_process *process) | |
577 | { | |
578 | sigchain_push(SIGPIPE, SIG_IGN); | |
579 | /* Closing the pipe signals the filter to initiate a shutdown. */ | |
580 | close(process->in); | |
581 | close(process->out); | |
582 | sigchain_pop(SIGPIPE); | |
583 | /* Finish command will wait until the shutdown is complete. */ | |
584 | finish_command(process); | |
585 | } | |
586 | ||
587 | static struct cmd2process *start_multi_file_filter(struct hashmap *hashmap, const char *cmd) | |
588 | { | |
589 | int err; | |
590 | struct cmd2process *entry; | |
591 | struct child_process *process; | |
592 | const char *argv[] = { cmd, NULL }; | |
593 | struct string_list cap_list = STRING_LIST_INIT_NODUP; | |
594 | char *cap_buf; | |
595 | const char *cap_name; | |
596 | ||
597 | entry = xmalloc(sizeof(*entry)); | |
598 | entry->cmd = cmd; | |
599 | entry->supported_capabilities = 0; | |
600 | process = &entry->process; | |
601 | ||
602 | child_process_init(process); | |
603 | process->argv = argv; | |
604 | process->use_shell = 1; | |
605 | process->in = -1; | |
606 | process->out = -1; | |
607 | process->clean_on_exit = 1; | |
608 | process->clean_on_exit_handler = stop_multi_file_filter; | |
609 | ||
610 | if (start_command(process)) { | |
611 | error("cannot fork to run external filter '%s'", cmd); | |
612 | return NULL; | |
613 | } | |
614 | ||
615 | hashmap_entry_init(entry, strhash(cmd)); | |
616 | ||
617 | sigchain_push(SIGPIPE, SIG_IGN); | |
618 | ||
619 | err = packet_write_list(process->in, "git-filter-client", "version=2", NULL); | |
620 | if (err) | |
621 | goto done; | |
622 | ||
623 | err = strcmp(packet_read_line(process->out, NULL), "git-filter-server"); | |
624 | if (err) { | |
625 | error("external filter '%s' does not support filter protocol version 2", cmd); | |
626 | goto done; | |
627 | } | |
628 | err = strcmp(packet_read_line(process->out, NULL), "version=2"); | |
629 | if (err) | |
630 | goto done; | |
631 | err = packet_read_line(process->out, NULL) != NULL; | |
632 | if (err) | |
633 | goto done; | |
634 | ||
635 | err = packet_write_list(process->in, "capability=clean", "capability=smudge", NULL); | |
636 | ||
637 | for (;;) { | |
638 | cap_buf = packet_read_line(process->out, NULL); | |
639 | if (!cap_buf) | |
640 | break; | |
641 | string_list_split_in_place(&cap_list, cap_buf, '=', 1); | |
642 | ||
643 | if (cap_list.nr != 2 || strcmp(cap_list.items[0].string, "capability")) | |
644 | continue; | |
645 | ||
646 | cap_name = cap_list.items[1].string; | |
647 | if (!strcmp(cap_name, "clean")) { | |
648 | entry->supported_capabilities |= CAP_CLEAN; | |
649 | } else if (!strcmp(cap_name, "smudge")) { | |
650 | entry->supported_capabilities |= CAP_SMUDGE; | |
651 | } else { | |
652 | warning( | |
653 | "external filter '%s' requested unsupported filter capability '%s'", | |
654 | cmd, cap_name | |
655 | ); | |
656 | } | |
657 | ||
658 | string_list_clear(&cap_list, 0); | |
659 | } | |
660 | ||
661 | done: | |
662 | sigchain_pop(SIGPIPE); | |
663 | ||
664 | if (err || errno == EPIPE) { | |
665 | error("initialization for external filter '%s' failed", cmd); | |
666 | kill_multi_file_filter(hashmap, entry); | |
667 | return NULL; | |
668 | } | |
669 | ||
670 | hashmap_add(hashmap, entry); | |
671 | return entry; | |
672 | } | |
673 | ||
674 | static int apply_multi_file_filter(const char *path, const char *src, size_t len, | |
675 | int fd, struct strbuf *dst, const char *cmd, | |
676 | const unsigned int wanted_capability) | |
677 | { | |
678 | int err; | |
679 | struct cmd2process *entry; | |
680 | struct child_process *process; | |
681 | struct strbuf nbuf = STRBUF_INIT; | |
682 | struct strbuf filter_status = STRBUF_INIT; | |
683 | const char *filter_type; | |
684 | ||
685 | if (!cmd_process_map_initialized) { | |
686 | cmd_process_map_initialized = 1; | |
687 | hashmap_init(&cmd_process_map, (hashmap_cmp_fn) cmd2process_cmp, 0); | |
688 | entry = NULL; | |
689 | } else { | |
690 | entry = find_multi_file_filter_entry(&cmd_process_map, cmd); | |
691 | } | |
692 | ||
693 | fflush(NULL); | |
694 | ||
695 | if (!entry) { | |
696 | entry = start_multi_file_filter(&cmd_process_map, cmd); | |
697 | if (!entry) | |
698 | return 0; | |
699 | } | |
700 | process = &entry->process; | |
701 | ||
702 | if (!(wanted_capability & entry->supported_capabilities)) | |
703 | return 0; | |
704 | ||
705 | if (CAP_CLEAN & wanted_capability) | |
706 | filter_type = "clean"; | |
707 | else if (CAP_SMUDGE & wanted_capability) | |
708 | filter_type = "smudge"; | |
709 | else | |
710 | die("unexpected filter type"); | |
711 | ||
712 | sigchain_push(SIGPIPE, SIG_IGN); | |
713 | ||
714 | assert(strlen(filter_type) < LARGE_PACKET_DATA_MAX - strlen("command=\n")); | |
715 | err = packet_write_fmt_gently(process->in, "command=%s\n", filter_type); | |
716 | if (err) | |
717 | goto done; | |
718 | ||
719 | err = strlen(path) > LARGE_PACKET_DATA_MAX - strlen("pathname=\n"); | |
720 | if (err) { | |
721 | error("path name too long for external filter"); | |
722 | goto done; | |
723 | } | |
724 | ||
725 | err = packet_write_fmt_gently(process->in, "pathname=%s\n", path); | |
726 | if (err) | |
727 | goto done; | |
728 | ||
729 | err = packet_flush_gently(process->in); | |
730 | if (err) | |
731 | goto done; | |
732 | ||
733 | if (fd >= 0) | |
734 | err = write_packetized_from_fd(fd, process->in); | |
735 | else | |
736 | err = write_packetized_from_buf(src, len, process->in); | |
737 | if (err) | |
738 | goto done; | |
739 | ||
740 | read_multi_file_filter_status(process->out, &filter_status); | |
741 | err = strcmp(filter_status.buf, "success"); | |
742 | if (err) | |
743 | goto done; | |
744 | ||
745 | err = read_packetized_to_strbuf(process->out, &nbuf) < 0; | |
746 | if (err) | |
747 | goto done; | |
748 | ||
749 | read_multi_file_filter_status(process->out, &filter_status); | |
750 | err = strcmp(filter_status.buf, "success"); | |
751 | ||
752 | done: | |
753 | sigchain_pop(SIGPIPE); | |
754 | ||
755 | if (err || errno == EPIPE) { | |
756 | if (!strcmp(filter_status.buf, "error")) { | |
757 | /* The filter signaled a problem with the file. */ | |
758 | } else if (!strcmp(filter_status.buf, "abort")) { | |
759 | /* | |
760 | * The filter signaled a permanent problem. Don't try to filter | |
761 | * files with the same command for the lifetime of the current | |
762 | * Git process. | |
763 | */ | |
764 | entry->supported_capabilities &= ~wanted_capability; | |
765 | } else { | |
766 | /* | |
767 | * Something went wrong with the protocol filter. | |
768 | * Force shutdown and restart if another blob requires filtering. | |
769 | */ | |
770 | error("external filter '%s' failed", cmd); | |
771 | kill_multi_file_filter(&cmd_process_map, entry); | |
772 | } | |
773 | } else { | |
774 | strbuf_swap(dst, &nbuf); | |
775 | } | |
776 | strbuf_release(&nbuf); | |
777 | return !err; | |
aa4ed402 JH |
778 | } |
779 | ||
780 | static struct convert_driver { | |
781 | const char *name; | |
782 | struct convert_driver *next; | |
cd8be6c9 BH |
783 | const char *smudge; |
784 | const char *clean; | |
edcc8581 | 785 | const char *process; |
36daaaca | 786 | int required; |
aa4ed402 JH |
787 | } *user_convert, **user_convert_tail; |
788 | ||
234fa07e LS |
789 | static int apply_filter(const char *path, const char *src, size_t len, |
790 | int fd, struct strbuf *dst, struct convert_driver *drv, | |
791 | const unsigned int wanted_capability) | |
792 | { | |
793 | const char *cmd = NULL; | |
794 | ||
795 | if (!drv) | |
796 | return 0; | |
797 | ||
798 | if (!dst) | |
799 | return 1; | |
800 | ||
edcc8581 | 801 | if ((CAP_CLEAN & wanted_capability) && !drv->process && drv->clean) |
234fa07e | 802 | cmd = drv->clean; |
edcc8581 | 803 | else if ((CAP_SMUDGE & wanted_capability) && !drv->process && drv->smudge) |
234fa07e LS |
804 | cmd = drv->smudge; |
805 | ||
806 | if (cmd && *cmd) | |
807 | return apply_single_file_filter(path, src, len, fd, dst, cmd); | |
edcc8581 LS |
808 | else if (drv->process && *drv->process) |
809 | return apply_multi_file_filter(path, src, len, fd, dst, drv->process, wanted_capability); | |
234fa07e LS |
810 | |
811 | return 0; | |
812 | } | |
813 | ||
ef90d6d4 | 814 | static int read_convert_config(const char *var, const char *value, void *cb) |
aa4ed402 | 815 | { |
d731f0ad | 816 | const char *key, *name; |
aa4ed402 JH |
817 | int namelen; |
818 | struct convert_driver *drv; | |
819 | ||
820 | /* | |
821 | * External conversion drivers are configured using | |
822 | * "filter.<name>.variable". | |
823 | */ | |
d731f0ad | 824 | if (parse_config_key(var, "filter", &name, &namelen, &key) < 0 || !name) |
aa4ed402 | 825 | return 0; |
aa4ed402 JH |
826 | for (drv = user_convert; drv; drv = drv->next) |
827 | if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) | |
828 | break; | |
829 | if (!drv) { | |
aa4ed402 | 830 | drv = xcalloc(1, sizeof(struct convert_driver)); |
182af834 | 831 | drv->name = xmemdupz(name, namelen); |
aa4ed402 JH |
832 | *user_convert_tail = drv; |
833 | user_convert_tail = &(drv->next); | |
834 | } | |
835 | ||
aa4ed402 JH |
836 | /* |
837 | * filter.<name>.smudge and filter.<name>.clean specifies | |
838 | * the command line: | |
839 | * | |
840 | * command-line | |
841 | * | |
842 | * The command-line will not be interpolated in any way. | |
843 | */ | |
844 | ||
d731f0ad | 845 | if (!strcmp("smudge", key)) |
cd8be6c9 BH |
846 | return git_config_string(&drv->smudge, var, value); |
847 | ||
d731f0ad | 848 | if (!strcmp("clean", key)) |
cd8be6c9 | 849 | return git_config_string(&drv->clean, var, value); |
aa4ed402 | 850 | |
edcc8581 LS |
851 | if (!strcmp("process", key)) |
852 | return git_config_string(&drv->process, var, value); | |
853 | ||
d731f0ad | 854 | if (!strcmp("required", key)) { |
36daaaca JB |
855 | drv->required = git_config_bool(var, value); |
856 | return 0; | |
857 | } | |
858 | ||
aa4ed402 JH |
859 | return 0; |
860 | } | |
861 | ||
3fed15f5 JH |
862 | static int count_ident(const char *cp, unsigned long size) |
863 | { | |
864 | /* | |
af9b54bb | 865 | * "$Id: 0000000000000000000000000000000000000000 $" <=> "$Id$" |
3fed15f5 JH |
866 | */ |
867 | int cnt = 0; | |
868 | char ch; | |
869 | ||
870 | while (size) { | |
871 | ch = *cp++; | |
872 | size--; | |
873 | if (ch != '$') | |
874 | continue; | |
af9b54bb | 875 | if (size < 3) |
3fed15f5 | 876 | break; |
af9b54bb | 877 | if (memcmp("Id", cp, 2)) |
3fed15f5 | 878 | continue; |
af9b54bb AP |
879 | ch = cp[2]; |
880 | cp += 3; | |
881 | size -= 3; | |
3fed15f5 | 882 | if (ch == '$') |
af9b54bb | 883 | cnt++; /* $Id$ */ |
3fed15f5 JH |
884 | if (ch != ':') |
885 | continue; | |
886 | ||
887 | /* | |
af9b54bb | 888 | * "$Id: ... "; scan up to the closing dollar sign and discard. |
3fed15f5 JH |
889 | */ |
890 | while (size) { | |
891 | ch = *cp++; | |
892 | size--; | |
893 | if (ch == '$') { | |
894 | cnt++; | |
895 | break; | |
896 | } | |
a9f3049f HG |
897 | if (ch == '\n') |
898 | break; | |
3fed15f5 JH |
899 | } |
900 | } | |
901 | return cnt; | |
902 | } | |
903 | ||
5ecd293d PH |
904 | static int ident_to_git(const char *path, const char *src, size_t len, |
905 | struct strbuf *buf, int ident) | |
3fed15f5 | 906 | { |
5ecd293d | 907 | char *dst, *dollar; |
3fed15f5 | 908 | |
4c3b57b9 | 909 | if (!ident || (src && !count_ident(src, len))) |
5ecd293d PH |
910 | return 0; |
911 | ||
92ac3197 JK |
912 | if (!buf) |
913 | return 1; | |
914 | ||
90d16ec0 PH |
915 | /* only grow if not in place */ |
916 | if (strbuf_avail(buf) + buf->len < len) | |
917 | strbuf_grow(buf, len - buf->len); | |
5ecd293d PH |
918 | dst = buf->buf; |
919 | for (;;) { | |
920 | dollar = memchr(src, '$', len); | |
921 | if (!dollar) | |
922 | break; | |
77321184 | 923 | memmove(dst, src, dollar + 1 - src); |
5ecd293d PH |
924 | dst += dollar + 1 - src; |
925 | len -= dollar + 1 - src; | |
926 | src = dollar + 1; | |
927 | ||
928 | if (len > 3 && !memcmp(src, "Id:", 3)) { | |
929 | dollar = memchr(src + 3, '$', len - 3); | |
930 | if (!dollar) | |
931 | break; | |
a9f3049f HG |
932 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
933 | /* Line break before the next dollar. */ | |
934 | continue; | |
935 | } | |
936 | ||
af9b54bb AP |
937 | memcpy(dst, "Id$", 3); |
938 | dst += 3; | |
5ecd293d PH |
939 | len -= dollar + 1 - src; |
940 | src = dollar + 1; | |
3fed15f5 JH |
941 | } |
942 | } | |
77321184 | 943 | memmove(dst, src, len); |
5ecd293d PH |
944 | strbuf_setlen(buf, dst + len - buf->buf); |
945 | return 1; | |
3fed15f5 JH |
946 | } |
947 | ||
5ecd293d PH |
948 | static int ident_to_worktree(const char *path, const char *src, size_t len, |
949 | struct strbuf *buf, int ident) | |
3fed15f5 | 950 | { |
3fed15f5 | 951 | unsigned char sha1[20]; |
07814d90 | 952 | char *to_free = NULL, *dollar, *spc; |
5ecd293d | 953 | int cnt; |
3fed15f5 JH |
954 | |
955 | if (!ident) | |
5ecd293d | 956 | return 0; |
3fed15f5 | 957 | |
5ecd293d | 958 | cnt = count_ident(src, len); |
3fed15f5 | 959 | if (!cnt) |
5ecd293d | 960 | return 0; |
3fed15f5 | 961 | |
5ecd293d PH |
962 | /* are we "faking" in place editing ? */ |
963 | if (src == buf->buf) | |
b315c5c0 | 964 | to_free = strbuf_detach(buf, NULL); |
5ecd293d | 965 | hash_sha1_file(src, len, "blob", sha1); |
3fed15f5 | 966 | |
5ecd293d PH |
967 | strbuf_grow(buf, len + cnt * 43); |
968 | for (;;) { | |
969 | /* step 1: run to the next '$' */ | |
970 | dollar = memchr(src, '$', len); | |
971 | if (!dollar) | |
972 | break; | |
973 | strbuf_add(buf, src, dollar + 1 - src); | |
974 | len -= dollar + 1 - src; | |
975 | src = dollar + 1; | |
c23290d5 | 976 | |
5ecd293d PH |
977 | /* step 2: does it looks like a bit like Id:xxx$ or Id$ ? */ |
978 | if (len < 3 || memcmp("Id", src, 2)) | |
3fed15f5 JH |
979 | continue; |
980 | ||
5ecd293d PH |
981 | /* step 3: skip over Id$ or Id:xxxxx$ */ |
982 | if (src[2] == '$') { | |
983 | src += 3; | |
984 | len -= 3; | |
985 | } else if (src[2] == ':') { | |
986 | /* | |
987 | * It's possible that an expanded Id has crept its way into the | |
07814d90 HG |
988 | * repository, we cope with that by stripping the expansion out. |
989 | * This is probably not a good idea, since it will cause changes | |
990 | * on checkout, which won't go away by stash, but let's keep it | |
991 | * for git-style ids. | |
5ecd293d PH |
992 | */ |
993 | dollar = memchr(src + 3, '$', len - 3); | |
994 | if (!dollar) { | |
995 | /* incomplete keyword, no more '$', so just quit the loop */ | |
996 | break; | |
997 | } | |
c23290d5 | 998 | |
a9f3049f HG |
999 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
1000 | /* Line break before the next dollar. */ | |
1001 | continue; | |
1002 | } | |
1003 | ||
07814d90 HG |
1004 | spc = memchr(src + 4, ' ', dollar - src - 4); |
1005 | if (spc && spc < dollar-1) { | |
1006 | /* There are spaces in unexpected places. | |
1007 | * This is probably an id from some other | |
1008 | * versioning system. Keep it for now. | |
1009 | */ | |
1010 | continue; | |
1011 | } | |
1012 | ||
5ecd293d PH |
1013 | len -= dollar + 1 - src; |
1014 | src = dollar + 1; | |
1015 | } else { | |
1016 | /* it wasn't a "Id$" or "Id:xxxx$" */ | |
1017 | continue; | |
1018 | } | |
c23290d5 | 1019 | |
5ecd293d PH |
1020 | /* step 4: substitute */ |
1021 | strbuf_addstr(buf, "Id: "); | |
1022 | strbuf_add(buf, sha1_to_hex(sha1), 40); | |
1023 | strbuf_addstr(buf, " $"); | |
3fed15f5 | 1024 | } |
5ecd293d | 1025 | strbuf_add(buf, src, len); |
3fed15f5 | 1026 | |
5ecd293d PH |
1027 | free(to_free); |
1028 | return 1; | |
35ebfd6a JH |
1029 | } |
1030 | ||
92cce135 | 1031 | static enum crlf_action git_path_check_crlf(struct git_attr_check *check) |
35ebfd6a | 1032 | { |
6073ee85 JH |
1033 | const char *value = check->value; |
1034 | ||
1035 | if (ATTR_TRUE(value)) | |
1036 | return CRLF_TEXT; | |
1037 | else if (ATTR_FALSE(value)) | |
1038 | return CRLF_BINARY; | |
1039 | else if (ATTR_UNSET(value)) | |
1040 | ; | |
1041 | else if (!strcmp(value, "input")) | |
df747b81 | 1042 | return CRLF_TEXT_INPUT; |
fd6cce9e EB |
1043 | else if (!strcmp(value, "auto")) |
1044 | return CRLF_AUTO; | |
df747b81 | 1045 | return CRLF_UNDEFINED; |
35ebfd6a JH |
1046 | } |
1047 | ||
92cce135 | 1048 | static enum eol git_path_check_eol(struct git_attr_check *check) |
fd6cce9e EB |
1049 | { |
1050 | const char *value = check->value; | |
1051 | ||
1052 | if (ATTR_UNSET(value)) | |
1053 | ; | |
1054 | else if (!strcmp(value, "lf")) | |
1055 | return EOL_LF; | |
1056 | else if (!strcmp(value, "crlf")) | |
1057 | return EOL_CRLF; | |
1058 | return EOL_UNSET; | |
1059 | } | |
1060 | ||
92cce135 | 1061 | static struct convert_driver *git_path_check_convert(struct git_attr_check *check) |
aa4ed402 JH |
1062 | { |
1063 | const char *value = check->value; | |
1064 | struct convert_driver *drv; | |
1065 | ||
1066 | if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) | |
1067 | return NULL; | |
1068 | for (drv = user_convert; drv; drv = drv->next) | |
1069 | if (!strcmp(value, drv->name)) | |
1070 | return drv; | |
1071 | return NULL; | |
1072 | } | |
1073 | ||
92cce135 | 1074 | static int git_path_check_ident(struct git_attr_check *check) |
3fed15f5 JH |
1075 | { |
1076 | const char *value = check->value; | |
1077 | ||
1078 | return !!ATTR_TRUE(value); | |
1079 | } | |
1080 | ||
3bfba20d JH |
1081 | struct conv_attrs { |
1082 | struct convert_driver *drv; | |
bb211b4d TB |
1083 | enum crlf_action attr_action; /* What attr says */ |
1084 | enum crlf_action crlf_action; /* When no attr is set, use core.autocrlf */ | |
3bfba20d JH |
1085 | int ident; |
1086 | }; | |
1087 | ||
83295964 JH |
1088 | static const char *conv_attr_name[] = { |
1089 | "crlf", "ident", "filter", "eol", "text", | |
1090 | }; | |
1091 | #define NUM_CONV_ATTRS ARRAY_SIZE(conv_attr_name) | |
1092 | ||
3bfba20d | 1093 | static void convert_attrs(struct conv_attrs *ca, const char *path) |
83295964 JH |
1094 | { |
1095 | int i; | |
1096 | static struct git_attr_check ccheck[NUM_CONV_ATTRS]; | |
1097 | ||
1098 | if (!ccheck[0].attr) { | |
1099 | for (i = 0; i < NUM_CONV_ATTRS; i++) | |
1100 | ccheck[i].attr = git_attr(conv_attr_name[i]); | |
1101 | user_convert_tail = &user_convert; | |
1102 | git_config(read_convert_config, NULL); | |
1103 | } | |
3bfba20d | 1104 | |
d932f4eb | 1105 | if (!git_check_attr(path, NUM_CONV_ATTRS, ccheck)) { |
bb211b4d | 1106 | ca->crlf_action = git_path_check_crlf(ccheck + 4); |
df747b81 | 1107 | if (ca->crlf_action == CRLF_UNDEFINED) |
92cce135 | 1108 | ca->crlf_action = git_path_check_crlf(ccheck + 0); |
bb211b4d | 1109 | ca->attr_action = ca->crlf_action; |
92cce135 TB |
1110 | ca->ident = git_path_check_ident(ccheck + 1); |
1111 | ca->drv = git_path_check_convert(ccheck + 2); | |
817a0c79 TB |
1112 | if (ca->crlf_action != CRLF_BINARY) { |
1113 | enum eol eol_attr = git_path_check_eol(ccheck + 3); | |
65237284 TB |
1114 | if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_LF) |
1115 | ca->crlf_action = CRLF_AUTO_INPUT; | |
1116 | else if (ca->crlf_action == CRLF_AUTO && eol_attr == EOL_CRLF) | |
1117 | ca->crlf_action = CRLF_AUTO_CRLF; | |
1118 | else if (eol_attr == EOL_LF) | |
817a0c79 TB |
1119 | ca->crlf_action = CRLF_TEXT_INPUT; |
1120 | else if (eol_attr == EOL_CRLF) | |
1121 | ca->crlf_action = CRLF_TEXT_CRLF; | |
1122 | } | |
1123 | ca->attr_action = ca->crlf_action; | |
3bfba20d JH |
1124 | } else { |
1125 | ca->drv = NULL; | |
df747b81 | 1126 | ca->crlf_action = CRLF_UNDEFINED; |
3bfba20d JH |
1127 | ca->ident = 0; |
1128 | } | |
df747b81 TB |
1129 | if (ca->crlf_action == CRLF_TEXT) |
1130 | ca->crlf_action = text_eol_is_crlf() ? CRLF_TEXT_CRLF : CRLF_TEXT_INPUT; | |
1131 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_FALSE) | |
1132 | ca->crlf_action = CRLF_BINARY; | |
1133 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_TRUE) | |
1134 | ca->crlf_action = CRLF_AUTO_CRLF; | |
1135 | if (ca->crlf_action == CRLF_UNDEFINED && auto_crlf == AUTO_CRLF_INPUT) | |
1136 | ca->crlf_action = CRLF_AUTO_INPUT; | |
83295964 JH |
1137 | } |
1138 | ||
9035d75a SP |
1139 | int would_convert_to_git_filter_fd(const char *path) |
1140 | { | |
1141 | struct conv_attrs ca; | |
1142 | ||
1143 | convert_attrs(&ca, path); | |
1144 | if (!ca.drv) | |
1145 | return 0; | |
1146 | ||
1147 | /* | |
1148 | * Apply a filter to an fd only if the filter is required to succeed. | |
1149 | * We must die if the filter fails, because the original data before | |
1150 | * filtering is not available. | |
1151 | */ | |
1152 | if (!ca.drv->required) | |
1153 | return 0; | |
1154 | ||
234fa07e | 1155 | return apply_filter(path, NULL, 0, -1, NULL, ca.drv, CAP_CLEAN); |
9035d75a SP |
1156 | } |
1157 | ||
a7630bd4 TB |
1158 | const char *get_convert_attr_ascii(const char *path) |
1159 | { | |
1160 | struct conv_attrs ca; | |
a7630bd4 TB |
1161 | |
1162 | convert_attrs(&ca, path); | |
bb211b4d | 1163 | switch (ca.attr_action) { |
df747b81 | 1164 | case CRLF_UNDEFINED: |
a7630bd4 TB |
1165 | return ""; |
1166 | case CRLF_BINARY: | |
1167 | return "-text"; | |
1168 | case CRLF_TEXT: | |
1169 | return "text"; | |
df747b81 | 1170 | case CRLF_TEXT_INPUT: |
a7630bd4 | 1171 | return "text eol=lf"; |
df747b81 TB |
1172 | case CRLF_TEXT_CRLF: |
1173 | return "text eol=crlf"; | |
a7630bd4 TB |
1174 | case CRLF_AUTO: |
1175 | return "text=auto"; | |
df747b81 | 1176 | case CRLF_AUTO_CRLF: |
65237284 | 1177 | return "text=auto eol=crlf"; |
df747b81 | 1178 | case CRLF_AUTO_INPUT: |
65237284 | 1179 | return "text=auto eol=lf"; |
a7630bd4 TB |
1180 | } |
1181 | return ""; | |
1182 | } | |
1183 | ||
21e5ad50 SP |
1184 | int convert_to_git(const char *path, const char *src, size_t len, |
1185 | struct strbuf *dst, enum safe_crlf checksafe) | |
35ebfd6a | 1186 | { |
3bfba20d | 1187 | int ret = 0; |
3bfba20d | 1188 | struct conv_attrs ca; |
6073ee85 | 1189 | |
3bfba20d | 1190 | convert_attrs(&ca, path); |
3fed15f5 | 1191 | |
234fa07e LS |
1192 | ret |= apply_filter(path, src, len, -1, dst, ca.drv, CAP_CLEAN); |
1193 | if (!ret && ca.drv && ca.drv->required) | |
36daaaca JB |
1194 | die("%s: clean filter '%s' failed", path, ca.drv->name); |
1195 | ||
92ac3197 | 1196 | if (ret && dst) { |
5ecd293d PH |
1197 | src = dst->buf; |
1198 | len = dst->len; | |
aa4ed402 | 1199 | } |
3bfba20d | 1200 | ret |= crlf_to_git(path, src, len, dst, ca.crlf_action, checksafe); |
92ac3197 | 1201 | if (ret && dst) { |
5ecd293d PH |
1202 | src = dst->buf; |
1203 | len = dst->len; | |
6073ee85 | 1204 | } |
3bfba20d | 1205 | return ret | ident_to_git(path, src, len, dst, ca.ident); |
35ebfd6a JH |
1206 | } |
1207 | ||
9035d75a SP |
1208 | void convert_to_git_filter_fd(const char *path, int fd, struct strbuf *dst, |
1209 | enum safe_crlf checksafe) | |
1210 | { | |
1211 | struct conv_attrs ca; | |
1212 | convert_attrs(&ca, path); | |
1213 | ||
1214 | assert(ca.drv); | |
edcc8581 | 1215 | assert(ca.drv->clean || ca.drv->process); |
9035d75a | 1216 | |
234fa07e | 1217 | if (!apply_filter(path, NULL, 0, fd, dst, ca.drv, CAP_CLEAN)) |
9035d75a SP |
1218 | die("%s: clean filter '%s' failed", path, ca.drv->name); |
1219 | ||
9035d75a SP |
1220 | crlf_to_git(path, dst->buf, dst->len, dst, ca.crlf_action, checksafe); |
1221 | ident_to_git(path, dst->buf, dst->len, dst, ca.ident); | |
1222 | } | |
1223 | ||
43dd2332 EB |
1224 | static int convert_to_working_tree_internal(const char *path, const char *src, |
1225 | size_t len, struct strbuf *dst, | |
1226 | int normalizing) | |
35ebfd6a | 1227 | { |
36daaaca | 1228 | int ret = 0, ret_filter = 0; |
3bfba20d | 1229 | struct conv_attrs ca; |
6073ee85 | 1230 | |
3bfba20d | 1231 | convert_attrs(&ca, path); |
3fed15f5 | 1232 | |
3bfba20d | 1233 | ret |= ident_to_worktree(path, src, len, dst, ca.ident); |
5ecd293d PH |
1234 | if (ret) { |
1235 | src = dst->buf; | |
1236 | len = dst->len; | |
3fed15f5 | 1237 | } |
43dd2332 EB |
1238 | /* |
1239 | * CRLF conversion can be skipped if normalizing, unless there | |
edcc8581 LS |
1240 | * is a smudge or process filter (even if the process filter doesn't |
1241 | * support smudge). The filters might expect CRLFs. | |
43dd2332 | 1242 | */ |
edcc8581 | 1243 | if ((ca.drv && (ca.drv->smudge || ca.drv->process)) || !normalizing) { |
3bfba20d | 1244 | ret |= crlf_to_worktree(path, src, len, dst, ca.crlf_action); |
43dd2332 EB |
1245 | if (ret) { |
1246 | src = dst->buf; | |
1247 | len = dst->len; | |
1248 | } | |
aa4ed402 | 1249 | } |
36daaaca | 1250 | |
234fa07e LS |
1251 | ret_filter = apply_filter(path, src, len, -1, dst, ca.drv, CAP_SMUDGE); |
1252 | if (!ret_filter && ca.drv && ca.drv->required) | |
36daaaca JB |
1253 | die("%s: smudge filter %s failed", path, ca.drv->name); |
1254 | ||
1255 | return ret | ret_filter; | |
35ebfd6a | 1256 | } |
f217f0e8 | 1257 | |
43dd2332 EB |
1258 | int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst) |
1259 | { | |
1260 | return convert_to_working_tree_internal(path, src, len, dst, 0); | |
1261 | } | |
1262 | ||
f217f0e8 EB |
1263 | int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst) |
1264 | { | |
43dd2332 | 1265 | int ret = convert_to_working_tree_internal(path, src, len, dst, 1); |
f217f0e8 EB |
1266 | if (ret) { |
1267 | src = dst->buf; | |
1268 | len = dst->len; | |
1269 | } | |
65237284 | 1270 | return ret | convert_to_git(path, src, len, dst, SAFE_CRLF_RENORMALIZE); |
f217f0e8 | 1271 | } |
dd8e9121 | 1272 | |
b6691092 JH |
1273 | /***************************************************************** |
1274 | * | |
749f763d | 1275 | * Streaming conversion support |
b6691092 JH |
1276 | * |
1277 | *****************************************************************/ | |
1278 | ||
1279 | typedef int (*filter_fn)(struct stream_filter *, | |
1280 | const char *input, size_t *isize_p, | |
1281 | char *output, size_t *osize_p); | |
1282 | typedef void (*free_fn)(struct stream_filter *); | |
1283 | ||
1284 | struct stream_filter_vtbl { | |
1285 | filter_fn filter; | |
1286 | free_fn free; | |
1287 | }; | |
1288 | ||
1289 | struct stream_filter { | |
1290 | struct stream_filter_vtbl *vtbl; | |
1291 | }; | |
1292 | ||
1293 | static int null_filter_fn(struct stream_filter *filter, | |
1294 | const char *input, size_t *isize_p, | |
1295 | char *output, size_t *osize_p) | |
1296 | { | |
4ae66704 JH |
1297 | size_t count; |
1298 | ||
1299 | if (!input) | |
1300 | return 0; /* we do not keep any states */ | |
1301 | count = *isize_p; | |
b6691092 JH |
1302 | if (*osize_p < count) |
1303 | count = *osize_p; | |
1304 | if (count) { | |
1305 | memmove(output, input, count); | |
1306 | *isize_p -= count; | |
1307 | *osize_p -= count; | |
1308 | } | |
1309 | return 0; | |
1310 | } | |
1311 | ||
1312 | static void null_free_fn(struct stream_filter *filter) | |
1313 | { | |
1314 | ; /* nothing -- null instances are shared */ | |
1315 | } | |
1316 | ||
1317 | static struct stream_filter_vtbl null_vtbl = { | |
1318 | null_filter_fn, | |
1319 | null_free_fn, | |
1320 | }; | |
1321 | ||
1322 | static struct stream_filter null_filter_singleton = { | |
1323 | &null_vtbl, | |
1324 | }; | |
1325 | ||
1326 | int is_null_stream_filter(struct stream_filter *filter) | |
1327 | { | |
1328 | return filter == &null_filter_singleton; | |
1329 | } | |
1330 | ||
b84c7839 JH |
1331 | |
1332 | /* | |
1333 | * LF-to-CRLF filter | |
1334 | */ | |
284e3d28 CMN |
1335 | |
1336 | struct lf_to_crlf_filter { | |
1337 | struct stream_filter filter; | |
8496f568 JH |
1338 | unsigned has_held:1; |
1339 | char held; | |
284e3d28 CMN |
1340 | }; |
1341 | ||
e322ee38 JH |
1342 | static int lf_to_crlf_filter_fn(struct stream_filter *filter, |
1343 | const char *input, size_t *isize_p, | |
1344 | char *output, size_t *osize_p) | |
1345 | { | |
284e3d28 CMN |
1346 | size_t count, o = 0; |
1347 | struct lf_to_crlf_filter *lf_to_crlf = (struct lf_to_crlf_filter *)filter; | |
1348 | ||
8496f568 JH |
1349 | /* |
1350 | * We may be holding onto the CR to see if it is followed by a | |
1351 | * LF, in which case we would need to go to the main loop. | |
1352 | * Otherwise, just emit it to the output stream. | |
1353 | */ | |
1354 | if (lf_to_crlf->has_held && (lf_to_crlf->held != '\r' || !input)) { | |
1355 | output[o++] = lf_to_crlf->held; | |
1356 | lf_to_crlf->has_held = 0; | |
284e3d28 | 1357 | } |
e322ee38 | 1358 | |
87afe9a5 JH |
1359 | /* We are told to drain */ |
1360 | if (!input) { | |
1361 | *osize_p -= o; | |
1362 | return 0; | |
1363 | } | |
e322ee38 | 1364 | |
e322ee38 | 1365 | count = *isize_p; |
8496f568 | 1366 | if (count || lf_to_crlf->has_held) { |
284e3d28 | 1367 | size_t i; |
8496f568 JH |
1368 | int was_cr = 0; |
1369 | ||
1370 | if (lf_to_crlf->has_held) { | |
1371 | was_cr = 1; | |
1372 | lf_to_crlf->has_held = 0; | |
1373 | } | |
1374 | ||
284e3d28 | 1375 | for (i = 0; o < *osize_p && i < count; i++) { |
e322ee38 | 1376 | char ch = input[i]; |
8496f568 | 1377 | |
e322ee38 | 1378 | if (ch == '\n') { |
284e3d28 | 1379 | output[o++] = '\r'; |
8496f568 JH |
1380 | } else if (was_cr) { |
1381 | /* | |
1382 | * Previous round saw CR and it is not followed | |
1383 | * by a LF; emit the CR before processing the | |
1384 | * current character. | |
1385 | */ | |
1386 | output[o++] = '\r'; | |
e322ee38 | 1387 | } |
8496f568 JH |
1388 | |
1389 | /* | |
1390 | * We may have consumed the last output slot, | |
1391 | * in which case we need to break out of this | |
1392 | * loop; hold the current character before | |
1393 | * returning. | |
1394 | */ | |
1395 | if (*osize_p <= o) { | |
1396 | lf_to_crlf->has_held = 1; | |
1397 | lf_to_crlf->held = ch; | |
1398 | continue; /* break but increment i */ | |
1399 | } | |
1400 | ||
1401 | if (ch == '\r') { | |
1402 | was_cr = 1; | |
1403 | continue; | |
1404 | } | |
1405 | ||
1406 | was_cr = 0; | |
e322ee38 JH |
1407 | output[o++] = ch; |
1408 | } | |
1409 | ||
1410 | *osize_p -= o; | |
1411 | *isize_p -= i; | |
8496f568 JH |
1412 | |
1413 | if (!lf_to_crlf->has_held && was_cr) { | |
1414 | lf_to_crlf->has_held = 1; | |
1415 | lf_to_crlf->held = '\r'; | |
1416 | } | |
e322ee38 JH |
1417 | } |
1418 | return 0; | |
1419 | } | |
1420 | ||
284e3d28 CMN |
1421 | static void lf_to_crlf_free_fn(struct stream_filter *filter) |
1422 | { | |
1423 | free(filter); | |
1424 | } | |
1425 | ||
e322ee38 JH |
1426 | static struct stream_filter_vtbl lf_to_crlf_vtbl = { |
1427 | lf_to_crlf_filter_fn, | |
284e3d28 | 1428 | lf_to_crlf_free_fn, |
e322ee38 JH |
1429 | }; |
1430 | ||
284e3d28 CMN |
1431 | static struct stream_filter *lf_to_crlf_filter(void) |
1432 | { | |
87afe9a5 | 1433 | struct lf_to_crlf_filter *lf_to_crlf = xcalloc(1, sizeof(*lf_to_crlf)); |
e322ee38 | 1434 | |
284e3d28 | 1435 | lf_to_crlf->filter.vtbl = &lf_to_crlf_vtbl; |
284e3d28 CMN |
1436 | return (struct stream_filter *)lf_to_crlf; |
1437 | } | |
b84c7839 | 1438 | |
a265a7f9 JH |
1439 | /* |
1440 | * Cascade filter | |
1441 | */ | |
1442 | #define FILTER_BUFFER 1024 | |
1443 | struct cascade_filter { | |
1444 | struct stream_filter filter; | |
1445 | struct stream_filter *one; | |
1446 | struct stream_filter *two; | |
1447 | char buf[FILTER_BUFFER]; | |
1448 | int end, ptr; | |
1449 | }; | |
1450 | ||
1451 | static int cascade_filter_fn(struct stream_filter *filter, | |
1452 | const char *input, size_t *isize_p, | |
1453 | char *output, size_t *osize_p) | |
1454 | { | |
1455 | struct cascade_filter *cas = (struct cascade_filter *) filter; | |
1456 | size_t filled = 0; | |
1457 | size_t sz = *osize_p; | |
1458 | size_t to_feed, remaining; | |
1459 | ||
1460 | /* | |
1461 | * input -- (one) --> buf -- (two) --> output | |
1462 | */ | |
1463 | while (filled < sz) { | |
1464 | remaining = sz - filled; | |
1465 | ||
1466 | /* do we already have something to feed two with? */ | |
1467 | if (cas->ptr < cas->end) { | |
1468 | to_feed = cas->end - cas->ptr; | |
1469 | if (stream_filter(cas->two, | |
1470 | cas->buf + cas->ptr, &to_feed, | |
1471 | output + filled, &remaining)) | |
1472 | return -1; | |
1473 | cas->ptr += (cas->end - cas->ptr) - to_feed; | |
1474 | filled = sz - remaining; | |
1475 | continue; | |
1476 | } | |
1477 | ||
1478 | /* feed one from upstream and have it emit into our buffer */ | |
1479 | to_feed = input ? *isize_p : 0; | |
1480 | if (input && !to_feed) | |
1481 | break; | |
1482 | remaining = sizeof(cas->buf); | |
1483 | if (stream_filter(cas->one, | |
1484 | input, &to_feed, | |
1485 | cas->buf, &remaining)) | |
1486 | return -1; | |
1487 | cas->end = sizeof(cas->buf) - remaining; | |
1488 | cas->ptr = 0; | |
1489 | if (input) { | |
1490 | size_t fed = *isize_p - to_feed; | |
1491 | *isize_p -= fed; | |
1492 | input += fed; | |
1493 | } | |
1494 | ||
1495 | /* do we know that we drained one completely? */ | |
1496 | if (input || cas->end) | |
1497 | continue; | |
1498 | ||
1499 | /* tell two to drain; we have nothing more to give it */ | |
1500 | to_feed = 0; | |
1501 | remaining = sz - filled; | |
1502 | if (stream_filter(cas->two, | |
1503 | NULL, &to_feed, | |
1504 | output + filled, &remaining)) | |
1505 | return -1; | |
1506 | if (remaining == (sz - filled)) | |
1507 | break; /* completely drained two */ | |
1508 | filled = sz - remaining; | |
1509 | } | |
1510 | *osize_p -= filled; | |
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | static void cascade_free_fn(struct stream_filter *filter) | |
1515 | { | |
1516 | struct cascade_filter *cas = (struct cascade_filter *)filter; | |
1517 | free_stream_filter(cas->one); | |
1518 | free_stream_filter(cas->two); | |
1519 | free(filter); | |
1520 | } | |
1521 | ||
1522 | static struct stream_filter_vtbl cascade_vtbl = { | |
1523 | cascade_filter_fn, | |
1524 | cascade_free_fn, | |
1525 | }; | |
1526 | ||
1527 | static struct stream_filter *cascade_filter(struct stream_filter *one, | |
1528 | struct stream_filter *two) | |
1529 | { | |
1530 | struct cascade_filter *cascade; | |
1531 | ||
1532 | if (!one || is_null_stream_filter(one)) | |
1533 | return two; | |
1534 | if (!two || is_null_stream_filter(two)) | |
1535 | return one; | |
1536 | ||
1537 | cascade = xmalloc(sizeof(*cascade)); | |
1538 | cascade->one = one; | |
1539 | cascade->two = two; | |
1540 | cascade->end = cascade->ptr = 0; | |
1541 | cascade->filter.vtbl = &cascade_vtbl; | |
1542 | return (struct stream_filter *)cascade; | |
1543 | } | |
1544 | ||
b84c7839 JH |
1545 | /* |
1546 | * ident filter | |
1547 | */ | |
1548 | #define IDENT_DRAINING (-1) | |
1549 | #define IDENT_SKIPPING (-2) | |
1550 | struct ident_filter { | |
1551 | struct stream_filter filter; | |
1552 | struct strbuf left; | |
1553 | int state; | |
1554 | char ident[45]; /* ": x40 $" */ | |
1555 | }; | |
1556 | ||
1557 | static int is_foreign_ident(const char *str) | |
1558 | { | |
1559 | int i; | |
1560 | ||
ae021d87 | 1561 | if (!skip_prefix(str, "$Id: ", &str)) |
b84c7839 | 1562 | return 0; |
ae021d87 | 1563 | for (i = 0; str[i]; i++) { |
b84c7839 JH |
1564 | if (isspace(str[i]) && str[i+1] != '$') |
1565 | return 1; | |
1566 | } | |
1567 | return 0; | |
1568 | } | |
1569 | ||
1570 | static void ident_drain(struct ident_filter *ident, char **output_p, size_t *osize_p) | |
1571 | { | |
1572 | size_t to_drain = ident->left.len; | |
1573 | ||
1574 | if (*osize_p < to_drain) | |
1575 | to_drain = *osize_p; | |
1576 | if (to_drain) { | |
1577 | memcpy(*output_p, ident->left.buf, to_drain); | |
1578 | strbuf_remove(&ident->left, 0, to_drain); | |
1579 | *output_p += to_drain; | |
1580 | *osize_p -= to_drain; | |
1581 | } | |
1582 | if (!ident->left.len) | |
1583 | ident->state = 0; | |
1584 | } | |
1585 | ||
1586 | static int ident_filter_fn(struct stream_filter *filter, | |
1587 | const char *input, size_t *isize_p, | |
1588 | char *output, size_t *osize_p) | |
1589 | { | |
1590 | struct ident_filter *ident = (struct ident_filter *)filter; | |
1591 | static const char head[] = "$Id"; | |
1592 | ||
1593 | if (!input) { | |
1594 | /* drain upon eof */ | |
1595 | switch (ident->state) { | |
1596 | default: | |
1597 | strbuf_add(&ident->left, head, ident->state); | |
1598 | case IDENT_SKIPPING: | |
1599 | /* fallthru */ | |
1600 | case IDENT_DRAINING: | |
1601 | ident_drain(ident, &output, osize_p); | |
1602 | } | |
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | while (*isize_p || (ident->state == IDENT_DRAINING)) { | |
1607 | int ch; | |
1608 | ||
1609 | if (ident->state == IDENT_DRAINING) { | |
1610 | ident_drain(ident, &output, osize_p); | |
1611 | if (!*osize_p) | |
1612 | break; | |
1613 | continue; | |
1614 | } | |
1615 | ||
1616 | ch = *(input++); | |
1617 | (*isize_p)--; | |
1618 | ||
1619 | if (ident->state == IDENT_SKIPPING) { | |
1620 | /* | |
1621 | * Skipping until '$' or LF, but keeping them | |
1622 | * in case it is a foreign ident. | |
1623 | */ | |
1624 | strbuf_addch(&ident->left, ch); | |
1625 | if (ch != '\n' && ch != '$') | |
1626 | continue; | |
1627 | if (ch == '$' && !is_foreign_ident(ident->left.buf)) { | |
1628 | strbuf_setlen(&ident->left, sizeof(head) - 1); | |
1629 | strbuf_addstr(&ident->left, ident->ident); | |
1630 | } | |
1631 | ident->state = IDENT_DRAINING; | |
1632 | continue; | |
1633 | } | |
1634 | ||
1635 | if (ident->state < sizeof(head) && | |
1636 | head[ident->state] == ch) { | |
1637 | ident->state++; | |
1638 | continue; | |
1639 | } | |
1640 | ||
1641 | if (ident->state) | |
1642 | strbuf_add(&ident->left, head, ident->state); | |
1643 | if (ident->state == sizeof(head) - 1) { | |
1644 | if (ch != ':' && ch != '$') { | |
1645 | strbuf_addch(&ident->left, ch); | |
1646 | ident->state = 0; | |
1647 | continue; | |
1648 | } | |
1649 | ||
1650 | if (ch == ':') { | |
1651 | strbuf_addch(&ident->left, ch); | |
1652 | ident->state = IDENT_SKIPPING; | |
1653 | } else { | |
1654 | strbuf_addstr(&ident->left, ident->ident); | |
1655 | ident->state = IDENT_DRAINING; | |
1656 | } | |
1657 | continue; | |
1658 | } | |
1659 | ||
1660 | strbuf_addch(&ident->left, ch); | |
1661 | ident->state = IDENT_DRAINING; | |
1662 | } | |
1663 | return 0; | |
1664 | } | |
1665 | ||
1666 | static void ident_free_fn(struct stream_filter *filter) | |
1667 | { | |
1668 | struct ident_filter *ident = (struct ident_filter *)filter; | |
1669 | strbuf_release(&ident->left); | |
1670 | free(filter); | |
1671 | } | |
1672 | ||
1673 | static struct stream_filter_vtbl ident_vtbl = { | |
1674 | ident_filter_fn, | |
1675 | ident_free_fn, | |
1676 | }; | |
1677 | ||
1678 | static struct stream_filter *ident_filter(const unsigned char *sha1) | |
1679 | { | |
1680 | struct ident_filter *ident = xmalloc(sizeof(*ident)); | |
1681 | ||
5096d490 JK |
1682 | xsnprintf(ident->ident, sizeof(ident->ident), |
1683 | ": %s $", sha1_to_hex(sha1)); | |
b84c7839 JH |
1684 | strbuf_init(&ident->left, 0); |
1685 | ident->filter.vtbl = &ident_vtbl; | |
1686 | ident->state = 0; | |
1687 | return (struct stream_filter *)ident; | |
1688 | } | |
1689 | ||
dd8e9121 | 1690 | /* |
b6691092 JH |
1691 | * Return an appropriately constructed filter for the path, or NULL if |
1692 | * the contents cannot be filtered without reading the whole thing | |
1693 | * in-core. | |
1694 | * | |
1695 | * Note that you would be crazy to set CRLF, smuge/clean or ident to a | |
1696 | * large binary blob you would want us not to slurp into the memory! | |
dd8e9121 | 1697 | */ |
b6691092 | 1698 | struct stream_filter *get_stream_filter(const char *path, const unsigned char *sha1) |
dd8e9121 JH |
1699 | { |
1700 | struct conv_attrs ca; | |
b84c7839 | 1701 | struct stream_filter *filter = NULL; |
dd8e9121 JH |
1702 | |
1703 | convert_attrs(&ca, path); | |
edcc8581 | 1704 | if (ca.drv && (ca.drv->process || ca.drv->smudge || ca.drv->clean)) |
caa47adc TB |
1705 | return NULL; |
1706 | ||
1707 | if (ca.crlf_action == CRLF_AUTO || ca.crlf_action == CRLF_AUTO_CRLF) | |
1708 | return NULL; | |
b84c7839 JH |
1709 | |
1710 | if (ca.ident) | |
1711 | filter = ident_filter(sha1); | |
dd8e9121 | 1712 | |
caa47adc | 1713 | if (output_eol(ca.crlf_action) == EOL_CRLF) |
284e3d28 | 1714 | filter = cascade_filter(filter, lf_to_crlf_filter()); |
caa47adc TB |
1715 | else |
1716 | filter = cascade_filter(filter, &null_filter_singleton); | |
e322ee38 | 1717 | |
b84c7839 | 1718 | return filter; |
b6691092 JH |
1719 | } |
1720 | ||
1721 | void free_stream_filter(struct stream_filter *filter) | |
1722 | { | |
1723 | filter->vtbl->free(filter); | |
1724 | } | |
1725 | ||
1726 | int stream_filter(struct stream_filter *filter, | |
1727 | const char *input, size_t *isize_p, | |
1728 | char *output, size_t *osize_p) | |
1729 | { | |
1730 | return filter->vtbl->filter(filter, input, isize_p, output, osize_p); | |
dd8e9121 | 1731 | } |