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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" |
35ebfd6a | 5 | |
6c510bee LT |
6 | /* |
7 | * convert.c - convert a file when checking it out and checking it in. | |
8 | * | |
9 | * This should use the pathname to decide on whether it wants to do some | |
10 | * more interesting conversions (automatic gzip/unzip, general format | |
11 | * conversions etc etc), but by default it just does automatic CRLF<->LF | |
942e7747 | 12 | * translation when the "text" attribute or "auto_crlf" option is set. |
6c510bee LT |
13 | */ |
14 | ||
c61dcff9 | 15 | enum crlf_action { |
fd6cce9e EB |
16 | CRLF_GUESS = -1, |
17 | CRLF_BINARY = 0, | |
18 | CRLF_TEXT, | |
19 | CRLF_INPUT, | |
20 | CRLF_CRLF, | |
c9b6782a | 21 | CRLF_AUTO |
fd6cce9e | 22 | }; |
163b9591 | 23 | |
6c510bee | 24 | struct text_stat { |
28624193 DP |
25 | /* NUL, CR, LF and CRLF counts */ |
26 | unsigned nul, cr, lf, crlf; | |
6c510bee LT |
27 | |
28 | /* These are just approximations! */ | |
29 | unsigned printable, nonprintable; | |
30 | }; | |
31 | ||
32 | static void gather_stats(const char *buf, unsigned long size, struct text_stat *stats) | |
33 | { | |
34 | unsigned long i; | |
35 | ||
36 | memset(stats, 0, sizeof(*stats)); | |
37 | ||
38 | for (i = 0; i < size; i++) { | |
39 | unsigned char c = buf[i]; | |
40 | if (c == '\r') { | |
41 | stats->cr++; | |
42 | if (i+1 < size && buf[i+1] == '\n') | |
43 | stats->crlf++; | |
44 | continue; | |
45 | } | |
46 | if (c == '\n') { | |
47 | stats->lf++; | |
48 | continue; | |
49 | } | |
50 | if (c == 127) | |
51 | /* DEL */ | |
52 | stats->nonprintable++; | |
53 | else if (c < 32) { | |
54 | switch (c) { | |
55 | /* BS, HT, ESC and FF */ | |
56 | case '\b': case '\t': case '\033': case '\014': | |
57 | stats->printable++; | |
58 | break; | |
28624193 DP |
59 | case 0: |
60 | stats->nul++; | |
61 | /* fall through */ | |
6c510bee LT |
62 | default: |
63 | stats->nonprintable++; | |
64 | } | |
65 | } | |
66 | else | |
67 | stats->printable++; | |
68 | } | |
f9dd4bf4 DK |
69 | |
70 | /* If file ends with EOF then don't count this EOF as non-printable. */ | |
71 | if (size >= 1 && buf[size-1] == '\032') | |
72 | stats->nonprintable--; | |
6c510bee LT |
73 | } |
74 | ||
75 | /* | |
76 | * The same heuristics as diff.c::mmfile_is_binary() | |
77 | */ | |
78 | static int is_binary(unsigned long size, struct text_stat *stats) | |
79 | { | |
80 | ||
28624193 DP |
81 | if (stats->nul) |
82 | return 1; | |
6c510bee LT |
83 | if ((stats->printable >> 7) < stats->nonprintable) |
84 | return 1; | |
85 | /* | |
86 | * Other heuristics? Average line length might be relevant, | |
87 | * as might LF vs CR vs CRLF counts.. | |
88 | * | |
89 | * NOTE! It might be normal to have a low ratio of CRLF to LF | |
90 | * (somebody starts with a LF-only file and edits it with an editor | |
91 | * that adds CRLF only to lines that are added..). But do we | |
92 | * want to support CR-only? Probably not. | |
93 | */ | |
94 | return 0; | |
95 | } | |
96 | ||
c61dcff9 | 97 | static enum eol output_eol(enum crlf_action crlf_action) |
f217f0e8 | 98 | { |
c61dcff9 | 99 | switch (crlf_action) { |
942e7747 EB |
100 | case CRLF_BINARY: |
101 | return EOL_UNSET; | |
102 | case CRLF_CRLF: | |
103 | return EOL_CRLF; | |
104 | case CRLF_INPUT: | |
105 | return EOL_LF; | |
106 | case CRLF_GUESS: | |
107 | if (!auto_crlf) | |
108 | return EOL_UNSET; | |
109 | /* fall through */ | |
110 | case CRLF_TEXT: | |
111 | case CRLF_AUTO: | |
112 | if (auto_crlf == AUTO_CRLF_TRUE) | |
113 | return EOL_CRLF; | |
114 | else if (auto_crlf == AUTO_CRLF_INPUT) | |
115 | return EOL_LF; | |
ec70f52f | 116 | else if (core_eol == EOL_UNSET) |
942e7747 EB |
117 | return EOL_NATIVE; |
118 | } | |
ec70f52f | 119 | return core_eol; |
942e7747 EB |
120 | } |
121 | ||
c61dcff9 | 122 | static void check_safe_crlf(const char *path, enum crlf_action crlf_action, |
21e5ad50 SP |
123 | struct text_stat *stats, enum safe_crlf checksafe) |
124 | { | |
125 | if (!checksafe) | |
126 | return; | |
127 | ||
c61dcff9 | 128 | if (output_eol(crlf_action) == EOL_LF) { |
21e5ad50 SP |
129 | /* |
130 | * CRLFs would not be restored by checkout: | |
131 | * check if we'd remove CRLFs | |
132 | */ | |
133 | if (stats->crlf) { | |
134 | if (checksafe == SAFE_CRLF_WARN) | |
942e7747 | 135 | warning("CRLF will be replaced by LF in %s.\nThe file will have its original line endings in your working directory.", path); |
21e5ad50 SP |
136 | else /* i.e. SAFE_CRLF_FAIL */ |
137 | die("CRLF would be replaced by LF in %s.", path); | |
138 | } | |
c61dcff9 | 139 | } else if (output_eol(crlf_action) == EOL_CRLF) { |
21e5ad50 SP |
140 | /* |
141 | * CRLFs would be added by checkout: | |
142 | * check if we have "naked" LFs | |
143 | */ | |
144 | if (stats->lf != stats->crlf) { | |
145 | if (checksafe == SAFE_CRLF_WARN) | |
942e7747 | 146 | warning("LF will be replaced by CRLF in %s.\nThe file will have its original line endings in your working directory.", path); |
21e5ad50 SP |
147 | else /* i.e. SAFE_CRLF_FAIL */ |
148 | die("LF would be replaced by CRLF in %s", path); | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
c4805393 FAG |
153 | static int has_cr_in_index(const char *path) |
154 | { | |
155 | int pos, len; | |
156 | unsigned long sz; | |
157 | enum object_type type; | |
158 | void *data; | |
159 | int has_cr; | |
160 | struct index_state *istate = &the_index; | |
161 | ||
162 | len = strlen(path); | |
163 | pos = index_name_pos(istate, path, len); | |
164 | if (pos < 0) { | |
165 | /* | |
166 | * We might be in the middle of a merge, in which | |
167 | * case we would read stage #2 (ours). | |
168 | */ | |
169 | int i; | |
170 | for (i = -pos - 1; | |
171 | (pos < 0 && i < istate->cache_nr && | |
172 | !strcmp(istate->cache[i]->name, path)); | |
173 | i++) | |
174 | if (ce_stage(istate->cache[i]) == 2) | |
175 | pos = i; | |
176 | } | |
177 | if (pos < 0) | |
178 | return 0; | |
179 | data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz); | |
180 | if (!data || type != OBJ_BLOB) { | |
181 | free(data); | |
182 | return 0; | |
183 | } | |
184 | ||
185 | has_cr = memchr(data, '\r', sz) != NULL; | |
186 | free(data); | |
187 | return has_cr; | |
188 | } | |
189 | ||
5ecd293d | 190 | static int crlf_to_git(const char *path, const char *src, size_t len, |
c61dcff9 JH |
191 | struct strbuf *buf, |
192 | enum crlf_action crlf_action, enum safe_crlf checksafe) | |
6c510bee | 193 | { |
6c510bee | 194 | struct text_stat stats; |
5ecd293d | 195 | char *dst; |
6c510bee | 196 | |
c61dcff9 JH |
197 | if (crlf_action == CRLF_BINARY || |
198 | (crlf_action == CRLF_GUESS && auto_crlf == AUTO_CRLF_FALSE) || !len) | |
5ecd293d | 199 | return 0; |
6c510bee | 200 | |
5ecd293d | 201 | gather_stats(src, len, &stats); |
6c510bee | 202 | |
c61dcff9 | 203 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_GUESS) { |
201ac8ef JH |
204 | /* |
205 | * We're currently not going to even try to convert stuff | |
206 | * that has bare CR characters. Does anybody do that crazy | |
207 | * stuff? | |
208 | */ | |
209 | if (stats.cr != stats.crlf) | |
5ecd293d | 210 | return 0; |
201ac8ef JH |
211 | |
212 | /* | |
213 | * And add some heuristics for binary vs text, of course... | |
214 | */ | |
5ecd293d PH |
215 | if (is_binary(len, &stats)) |
216 | return 0; | |
c4805393 | 217 | |
c61dcff9 | 218 | if (crlf_action == CRLF_GUESS) { |
fd6cce9e EB |
219 | /* |
220 | * If the file in the index has any CR in it, do not convert. | |
221 | * This is the new safer autocrlf handling. | |
222 | */ | |
223 | if (has_cr_in_index(path)) | |
224 | return 0; | |
225 | } | |
201ac8ef | 226 | } |
6c510bee | 227 | |
c61dcff9 | 228 | check_safe_crlf(path, crlf_action, &stats, checksafe); |
21e5ad50 SP |
229 | |
230 | /* Optimization: No CR? Nothing to convert, regardless. */ | |
231 | if (!stats.cr) | |
232 | return 0; | |
233 | ||
90d16ec0 PH |
234 | /* only grow if not in place */ |
235 | if (strbuf_avail(buf) + buf->len < len) | |
236 | strbuf_grow(buf, len - buf->len); | |
5ecd293d | 237 | dst = buf->buf; |
c61dcff9 | 238 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_GUESS) { |
163b9591 JH |
239 | /* |
240 | * If we guessed, we already know we rejected a file with | |
241 | * lone CR, and we can strip a CR without looking at what | |
242 | * follow it. | |
243 | */ | |
201ac8ef | 244 | do { |
ac78e548 | 245 | unsigned char c = *src++; |
201ac8ef | 246 | if (c != '\r') |
ac78e548 | 247 | *dst++ = c; |
5ecd293d | 248 | } while (--len); |
201ac8ef JH |
249 | } else { |
250 | do { | |
ac78e548 | 251 | unsigned char c = *src++; |
5ecd293d | 252 | if (! (c == '\r' && (1 < len && *src == '\n'))) |
ac78e548 | 253 | *dst++ = c; |
5ecd293d | 254 | } while (--len); |
201ac8ef | 255 | } |
5ecd293d PH |
256 | strbuf_setlen(buf, dst - buf->buf); |
257 | return 1; | |
6c510bee LT |
258 | } |
259 | ||
5ecd293d | 260 | static int crlf_to_worktree(const char *path, const char *src, size_t len, |
c61dcff9 | 261 | struct strbuf *buf, enum crlf_action crlf_action) |
6c510bee | 262 | { |
5ecd293d | 263 | char *to_free = NULL; |
6c510bee | 264 | struct text_stat stats; |
6c510bee | 265 | |
c61dcff9 | 266 | if (!len || output_eol(crlf_action) != EOL_CRLF) |
5ecd293d | 267 | return 0; |
6c510bee | 268 | |
5ecd293d | 269 | gather_stats(src, len, &stats); |
6c510bee LT |
270 | |
271 | /* No LF? Nothing to convert, regardless. */ | |
272 | if (!stats.lf) | |
5ecd293d | 273 | return 0; |
6c510bee LT |
274 | |
275 | /* Was it already in CRLF format? */ | |
276 | if (stats.lf == stats.crlf) | |
5ecd293d | 277 | return 0; |
6c510bee | 278 | |
c61dcff9 JH |
279 | if (crlf_action == CRLF_AUTO || crlf_action == CRLF_GUESS) { |
280 | if (crlf_action == CRLF_GUESS) { | |
fd6cce9e EB |
281 | /* If we have any CR or CRLF line endings, we do not touch it */ |
282 | /* This is the new safer autocrlf-handling */ | |
283 | if (stats.cr > 0 || stats.crlf > 0) | |
284 | return 0; | |
285 | } | |
c4805393 | 286 | |
201ac8ef JH |
287 | /* If we have any bare CR characters, we're not going to touch it */ |
288 | if (stats.cr != stats.crlf) | |
5ecd293d | 289 | return 0; |
6c510bee | 290 | |
5ecd293d PH |
291 | if (is_binary(len, &stats)) |
292 | return 0; | |
201ac8ef | 293 | } |
6c510bee | 294 | |
5ecd293d PH |
295 | /* are we "faking" in place editing ? */ |
296 | if (src == buf->buf) | |
b315c5c0 | 297 | to_free = strbuf_detach(buf, NULL); |
5ecd293d PH |
298 | |
299 | strbuf_grow(buf, len + stats.lf - stats.crlf); | |
300 | for (;;) { | |
301 | const char *nl = memchr(src, '\n', len); | |
302 | if (!nl) | |
303 | break; | |
304 | if (nl > src && nl[-1] == '\r') { | |
305 | strbuf_add(buf, src, nl + 1 - src); | |
306 | } else { | |
307 | strbuf_add(buf, src, nl - src); | |
308 | strbuf_addstr(buf, "\r\n"); | |
309 | } | |
310 | len -= nl + 1 - src; | |
311 | src = nl + 1; | |
312 | } | |
313 | strbuf_add(buf, src, len); | |
314 | ||
315 | free(to_free); | |
316 | return 1; | |
6c510bee | 317 | } |
35ebfd6a | 318 | |
546bb582 JS |
319 | struct filter_params { |
320 | const char *src; | |
321 | unsigned long size; | |
322 | const char *cmd; | |
a2b665de | 323 | const char *path; |
546bb582 JS |
324 | }; |
325 | ||
ae6a5609 | 326 | static int filter_buffer(int in, int out, void *data) |
aa4ed402 JH |
327 | { |
328 | /* | |
329 | * Spawn cmd and feed the buffer contents through its stdin. | |
330 | */ | |
331 | struct child_process child_process; | |
546bb582 | 332 | struct filter_params *params = (struct filter_params *)data; |
aa4ed402 | 333 | int write_err, status; |
66dbfd55 GV |
334 | const char *argv[] = { NULL, NULL }; |
335 | ||
a2b665de PW |
336 | /* apply % substitution to cmd */ |
337 | struct strbuf cmd = STRBUF_INIT; | |
338 | struct strbuf path = STRBUF_INIT; | |
339 | struct strbuf_expand_dict_entry dict[] = { | |
340 | { "f", NULL, }, | |
341 | { NULL, NULL, }, | |
342 | }; | |
343 | ||
344 | /* quote the path to preserve spaces, etc. */ | |
345 | sq_quote_buf(&path, params->path); | |
346 | dict[0].value = path.buf; | |
347 | ||
348 | /* expand all %f with the quoted path */ | |
349 | strbuf_expand(&cmd, params->cmd, strbuf_expand_dict_cb, &dict); | |
350 | strbuf_release(&path); | |
351 | ||
352 | argv[0] = cmd.buf; | |
aa4ed402 JH |
353 | |
354 | memset(&child_process, 0, sizeof(child_process)); | |
dc1bfdcd | 355 | child_process.argv = argv; |
ac0ba18d | 356 | child_process.use_shell = 1; |
dc1bfdcd | 357 | child_process.in = -1; |
ae6a5609 | 358 | child_process.out = out; |
aa4ed402 | 359 | |
dc1bfdcd | 360 | if (start_command(&child_process)) |
546bb582 | 361 | return error("cannot fork to run external filter %s", params->cmd); |
aa4ed402 | 362 | |
546bb582 | 363 | write_err = (write_in_full(child_process.in, params->src, params->size) < 0); |
dc1bfdcd | 364 | if (close(child_process.in)) |
aa4ed402 JH |
365 | write_err = 1; |
366 | if (write_err) | |
546bb582 | 367 | error("cannot feed the input to external filter %s", params->cmd); |
aa4ed402 JH |
368 | |
369 | status = finish_command(&child_process); | |
370 | if (status) | |
5709e036 | 371 | error("external filter %s failed %d", params->cmd, status); |
a2b665de PW |
372 | |
373 | strbuf_release(&cmd); | |
aa4ed402 JH |
374 | return (write_err || status); |
375 | } | |
376 | ||
5ecd293d PH |
377 | static int apply_filter(const char *path, const char *src, size_t len, |
378 | struct strbuf *dst, const char *cmd) | |
aa4ed402 JH |
379 | { |
380 | /* | |
381 | * Create a pipeline to have the command filter the buffer's | |
382 | * contents. | |
383 | * | |
384 | * (child --> cmd) --> us | |
385 | */ | |
546bb582 | 386 | int ret = 1; |
f285a2d7 | 387 | struct strbuf nbuf = STRBUF_INIT; |
546bb582 JS |
388 | struct async async; |
389 | struct filter_params params; | |
aa4ed402 JH |
390 | |
391 | if (!cmd) | |
5ecd293d | 392 | return 0; |
aa4ed402 | 393 | |
546bb582 JS |
394 | memset(&async, 0, sizeof(async)); |
395 | async.proc = filter_buffer; | |
396 | async.data = ¶ms; | |
ae6a5609 | 397 | async.out = -1; |
546bb582 JS |
398 | params.src = src; |
399 | params.size = len; | |
400 | params.cmd = cmd; | |
a2b665de | 401 | params.path = path; |
aa4ed402 JH |
402 | |
403 | fflush(NULL); | |
546bb582 JS |
404 | if (start_async(&async)) |
405 | return 0; /* error was already reported */ | |
aa4ed402 | 406 | |
546bb582 | 407 | if (strbuf_read(&nbuf, async.out, len) < 0) { |
5ecd293d PH |
408 | error("read from external filter %s failed", cmd); |
409 | ret = 0; | |
aa4ed402 | 410 | } |
546bb582 | 411 | if (close(async.out)) { |
90d16ec0 | 412 | error("read from external filter %s failed", cmd); |
5ecd293d | 413 | ret = 0; |
aa4ed402 | 414 | } |
546bb582 JS |
415 | if (finish_async(&async)) { |
416 | error("external filter %s failed", cmd); | |
5ecd293d | 417 | ret = 0; |
aa4ed402 JH |
418 | } |
419 | ||
5ecd293d | 420 | if (ret) { |
90d16ec0 | 421 | strbuf_swap(dst, &nbuf); |
5ecd293d | 422 | } |
90d16ec0 | 423 | strbuf_release(&nbuf); |
5ecd293d | 424 | return ret; |
aa4ed402 JH |
425 | } |
426 | ||
427 | static struct convert_driver { | |
428 | const char *name; | |
429 | struct convert_driver *next; | |
cd8be6c9 BH |
430 | const char *smudge; |
431 | const char *clean; | |
aa4ed402 JH |
432 | } *user_convert, **user_convert_tail; |
433 | ||
ef90d6d4 | 434 | static int read_convert_config(const char *var, const char *value, void *cb) |
aa4ed402 JH |
435 | { |
436 | const char *ep, *name; | |
437 | int namelen; | |
438 | struct convert_driver *drv; | |
439 | ||
440 | /* | |
441 | * External conversion drivers are configured using | |
442 | * "filter.<name>.variable". | |
443 | */ | |
444 | if (prefixcmp(var, "filter.") || (ep = strrchr(var, '.')) == var + 6) | |
445 | return 0; | |
446 | name = var + 7; | |
447 | namelen = ep - name; | |
448 | for (drv = user_convert; drv; drv = drv->next) | |
449 | if (!strncmp(drv->name, name, namelen) && !drv->name[namelen]) | |
450 | break; | |
451 | if (!drv) { | |
aa4ed402 | 452 | drv = xcalloc(1, sizeof(struct convert_driver)); |
182af834 | 453 | drv->name = xmemdupz(name, namelen); |
aa4ed402 JH |
454 | *user_convert_tail = drv; |
455 | user_convert_tail = &(drv->next); | |
456 | } | |
457 | ||
458 | ep++; | |
459 | ||
460 | /* | |
461 | * filter.<name>.smudge and filter.<name>.clean specifies | |
462 | * the command line: | |
463 | * | |
464 | * command-line | |
465 | * | |
466 | * The command-line will not be interpolated in any way. | |
467 | */ | |
468 | ||
cd8be6c9 BH |
469 | if (!strcmp("smudge", ep)) |
470 | return git_config_string(&drv->smudge, var, value); | |
471 | ||
472 | if (!strcmp("clean", ep)) | |
473 | return git_config_string(&drv->clean, var, value); | |
aa4ed402 | 474 | |
aa4ed402 JH |
475 | return 0; |
476 | } | |
477 | ||
6073ee85 | 478 | static void setup_convert_check(struct git_attr_check *check) |
35ebfd6a | 479 | { |
5ec3e670 | 480 | static struct git_attr *attr_text; |
35ebfd6a | 481 | static struct git_attr *attr_crlf; |
fd6cce9e | 482 | static struct git_attr *attr_eol; |
3fed15f5 | 483 | static struct git_attr *attr_ident; |
aa4ed402 | 484 | static struct git_attr *attr_filter; |
35ebfd6a | 485 | |
5ec3e670 EB |
486 | if (!attr_text) { |
487 | attr_text = git_attr("text"); | |
7fb0eaa2 | 488 | attr_crlf = git_attr("crlf"); |
fd6cce9e | 489 | attr_eol = git_attr("eol"); |
7fb0eaa2 JH |
490 | attr_ident = git_attr("ident"); |
491 | attr_filter = git_attr("filter"); | |
aa4ed402 | 492 | user_convert_tail = &user_convert; |
ef90d6d4 | 493 | git_config(read_convert_config, NULL); |
3fed15f5 JH |
494 | } |
495 | check[0].attr = attr_crlf; | |
496 | check[1].attr = attr_ident; | |
aa4ed402 | 497 | check[2].attr = attr_filter; |
fd6cce9e | 498 | check[3].attr = attr_eol; |
5ec3e670 | 499 | check[4].attr = attr_text; |
3fed15f5 JH |
500 | } |
501 | ||
502 | static int count_ident(const char *cp, unsigned long size) | |
503 | { | |
504 | /* | |
af9b54bb | 505 | * "$Id: 0000000000000000000000000000000000000000 $" <=> "$Id$" |
3fed15f5 JH |
506 | */ |
507 | int cnt = 0; | |
508 | char ch; | |
509 | ||
510 | while (size) { | |
511 | ch = *cp++; | |
512 | size--; | |
513 | if (ch != '$') | |
514 | continue; | |
af9b54bb | 515 | if (size < 3) |
3fed15f5 | 516 | break; |
af9b54bb | 517 | if (memcmp("Id", cp, 2)) |
3fed15f5 | 518 | continue; |
af9b54bb AP |
519 | ch = cp[2]; |
520 | cp += 3; | |
521 | size -= 3; | |
3fed15f5 | 522 | if (ch == '$') |
af9b54bb | 523 | cnt++; /* $Id$ */ |
3fed15f5 JH |
524 | if (ch != ':') |
525 | continue; | |
526 | ||
527 | /* | |
af9b54bb | 528 | * "$Id: ... "; scan up to the closing dollar sign and discard. |
3fed15f5 JH |
529 | */ |
530 | while (size) { | |
531 | ch = *cp++; | |
532 | size--; | |
533 | if (ch == '$') { | |
534 | cnt++; | |
535 | break; | |
536 | } | |
a9f3049f HG |
537 | if (ch == '\n') |
538 | break; | |
3fed15f5 JH |
539 | } |
540 | } | |
541 | return cnt; | |
542 | } | |
543 | ||
5ecd293d PH |
544 | static int ident_to_git(const char *path, const char *src, size_t len, |
545 | struct strbuf *buf, int ident) | |
3fed15f5 | 546 | { |
5ecd293d | 547 | char *dst, *dollar; |
3fed15f5 | 548 | |
5ecd293d PH |
549 | if (!ident || !count_ident(src, len)) |
550 | return 0; | |
551 | ||
90d16ec0 PH |
552 | /* only grow if not in place */ |
553 | if (strbuf_avail(buf) + buf->len < len) | |
554 | strbuf_grow(buf, len - buf->len); | |
5ecd293d PH |
555 | dst = buf->buf; |
556 | for (;;) { | |
557 | dollar = memchr(src, '$', len); | |
558 | if (!dollar) | |
559 | break; | |
560 | memcpy(dst, src, dollar + 1 - src); | |
561 | dst += dollar + 1 - src; | |
562 | len -= dollar + 1 - src; | |
563 | src = dollar + 1; | |
564 | ||
565 | if (len > 3 && !memcmp(src, "Id:", 3)) { | |
566 | dollar = memchr(src + 3, '$', len - 3); | |
567 | if (!dollar) | |
568 | break; | |
a9f3049f HG |
569 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
570 | /* Line break before the next dollar. */ | |
571 | continue; | |
572 | } | |
573 | ||
af9b54bb AP |
574 | memcpy(dst, "Id$", 3); |
575 | dst += 3; | |
5ecd293d PH |
576 | len -= dollar + 1 - src; |
577 | src = dollar + 1; | |
3fed15f5 JH |
578 | } |
579 | } | |
5ecd293d PH |
580 | memcpy(dst, src, len); |
581 | strbuf_setlen(buf, dst + len - buf->buf); | |
582 | return 1; | |
3fed15f5 JH |
583 | } |
584 | ||
5ecd293d PH |
585 | static int ident_to_worktree(const char *path, const char *src, size_t len, |
586 | struct strbuf *buf, int ident) | |
3fed15f5 | 587 | { |
3fed15f5 | 588 | unsigned char sha1[20]; |
07814d90 | 589 | char *to_free = NULL, *dollar, *spc; |
5ecd293d | 590 | int cnt; |
3fed15f5 JH |
591 | |
592 | if (!ident) | |
5ecd293d | 593 | return 0; |
3fed15f5 | 594 | |
5ecd293d | 595 | cnt = count_ident(src, len); |
3fed15f5 | 596 | if (!cnt) |
5ecd293d | 597 | return 0; |
3fed15f5 | 598 | |
5ecd293d PH |
599 | /* are we "faking" in place editing ? */ |
600 | if (src == buf->buf) | |
b315c5c0 | 601 | to_free = strbuf_detach(buf, NULL); |
5ecd293d | 602 | hash_sha1_file(src, len, "blob", sha1); |
3fed15f5 | 603 | |
5ecd293d PH |
604 | strbuf_grow(buf, len + cnt * 43); |
605 | for (;;) { | |
606 | /* step 1: run to the next '$' */ | |
607 | dollar = memchr(src, '$', len); | |
608 | if (!dollar) | |
609 | break; | |
610 | strbuf_add(buf, src, dollar + 1 - src); | |
611 | len -= dollar + 1 - src; | |
612 | src = dollar + 1; | |
c23290d5 | 613 | |
5ecd293d PH |
614 | /* step 2: does it looks like a bit like Id:xxx$ or Id$ ? */ |
615 | if (len < 3 || memcmp("Id", src, 2)) | |
3fed15f5 JH |
616 | continue; |
617 | ||
5ecd293d PH |
618 | /* step 3: skip over Id$ or Id:xxxxx$ */ |
619 | if (src[2] == '$') { | |
620 | src += 3; | |
621 | len -= 3; | |
622 | } else if (src[2] == ':') { | |
623 | /* | |
624 | * It's possible that an expanded Id has crept its way into the | |
07814d90 HG |
625 | * repository, we cope with that by stripping the expansion out. |
626 | * This is probably not a good idea, since it will cause changes | |
627 | * on checkout, which won't go away by stash, but let's keep it | |
628 | * for git-style ids. | |
5ecd293d PH |
629 | */ |
630 | dollar = memchr(src + 3, '$', len - 3); | |
631 | if (!dollar) { | |
632 | /* incomplete keyword, no more '$', so just quit the loop */ | |
633 | break; | |
634 | } | |
c23290d5 | 635 | |
a9f3049f HG |
636 | if (memchr(src + 3, '\n', dollar - src - 3)) { |
637 | /* Line break before the next dollar. */ | |
638 | continue; | |
639 | } | |
640 | ||
07814d90 HG |
641 | spc = memchr(src + 4, ' ', dollar - src - 4); |
642 | if (spc && spc < dollar-1) { | |
643 | /* There are spaces in unexpected places. | |
644 | * This is probably an id from some other | |
645 | * versioning system. Keep it for now. | |
646 | */ | |
647 | continue; | |
648 | } | |
649 | ||
5ecd293d PH |
650 | len -= dollar + 1 - src; |
651 | src = dollar + 1; | |
652 | } else { | |
653 | /* it wasn't a "Id$" or "Id:xxxx$" */ | |
654 | continue; | |
655 | } | |
c23290d5 | 656 | |
5ecd293d PH |
657 | /* step 4: substitute */ |
658 | strbuf_addstr(buf, "Id: "); | |
659 | strbuf_add(buf, sha1_to_hex(sha1), 40); | |
660 | strbuf_addstr(buf, " $"); | |
3fed15f5 | 661 | } |
5ecd293d | 662 | strbuf_add(buf, src, len); |
3fed15f5 | 663 | |
5ecd293d PH |
664 | free(to_free); |
665 | return 1; | |
35ebfd6a JH |
666 | } |
667 | ||
6073ee85 | 668 | static int git_path_check_crlf(const char *path, struct git_attr_check *check) |
35ebfd6a | 669 | { |
6073ee85 JH |
670 | const char *value = check->value; |
671 | ||
672 | if (ATTR_TRUE(value)) | |
673 | return CRLF_TEXT; | |
674 | else if (ATTR_FALSE(value)) | |
675 | return CRLF_BINARY; | |
676 | else if (ATTR_UNSET(value)) | |
677 | ; | |
678 | else if (!strcmp(value, "input")) | |
679 | return CRLF_INPUT; | |
fd6cce9e EB |
680 | else if (!strcmp(value, "auto")) |
681 | return CRLF_AUTO; | |
163b9591 | 682 | return CRLF_GUESS; |
35ebfd6a JH |
683 | } |
684 | ||
fd6cce9e EB |
685 | static int git_path_check_eol(const char *path, struct git_attr_check *check) |
686 | { | |
687 | const char *value = check->value; | |
688 | ||
689 | if (ATTR_UNSET(value)) | |
690 | ; | |
691 | else if (!strcmp(value, "lf")) | |
692 | return EOL_LF; | |
693 | else if (!strcmp(value, "crlf")) | |
694 | return EOL_CRLF; | |
695 | return EOL_UNSET; | |
696 | } | |
697 | ||
aa4ed402 JH |
698 | static struct convert_driver *git_path_check_convert(const char *path, |
699 | struct git_attr_check *check) | |
700 | { | |
701 | const char *value = check->value; | |
702 | struct convert_driver *drv; | |
703 | ||
704 | if (ATTR_TRUE(value) || ATTR_FALSE(value) || ATTR_UNSET(value)) | |
705 | return NULL; | |
706 | for (drv = user_convert; drv; drv = drv->next) | |
707 | if (!strcmp(value, drv->name)) | |
708 | return drv; | |
709 | return NULL; | |
710 | } | |
711 | ||
3fed15f5 JH |
712 | static int git_path_check_ident(const char *path, struct git_attr_check *check) |
713 | { | |
714 | const char *value = check->value; | |
715 | ||
716 | return !!ATTR_TRUE(value); | |
717 | } | |
718 | ||
c61dcff9 | 719 | static enum crlf_action input_crlf_action(enum crlf_action text_attr, enum eol eol_attr) |
f217f0e8 | 720 | { |
5ec3e670 | 721 | if (text_attr == CRLF_BINARY) |
fd6cce9e EB |
722 | return CRLF_BINARY; |
723 | if (eol_attr == EOL_LF) | |
724 | return CRLF_INPUT; | |
725 | if (eol_attr == EOL_CRLF) | |
726 | return CRLF_CRLF; | |
5ec3e670 | 727 | return text_attr; |
fd6cce9e EB |
728 | } |
729 | ||
21e5ad50 SP |
730 | int convert_to_git(const char *path, const char *src, size_t len, |
731 | struct strbuf *dst, enum safe_crlf checksafe) | |
35ebfd6a | 732 | { |
5ec3e670 | 733 | struct git_attr_check check[5]; |
c61dcff9 | 734 | enum crlf_action crlf_action = CRLF_GUESS; |
942e7747 | 735 | enum eol eol_attr = EOL_UNSET; |
5ecd293d | 736 | int ident = 0, ret = 0; |
cd8be6c9 | 737 | const char *filter = NULL; |
6073ee85 JH |
738 | |
739 | setup_convert_check(check); | |
3fed15f5 | 740 | if (!git_checkattr(path, ARRAY_SIZE(check), check)) { |
aa4ed402 | 741 | struct convert_driver *drv; |
c61dcff9 JH |
742 | crlf_action = git_path_check_crlf(path, check + 4); |
743 | if (crlf_action == CRLF_GUESS) | |
744 | crlf_action = git_path_check_crlf(path, check + 0); | |
3fed15f5 | 745 | ident = git_path_check_ident(path, check + 1); |
aa4ed402 | 746 | drv = git_path_check_convert(path, check + 2); |
942e7747 | 747 | eol_attr = git_path_check_eol(path, check + 3); |
aa4ed402 JH |
748 | if (drv && drv->clean) |
749 | filter = drv->clean; | |
3fed15f5 JH |
750 | } |
751 | ||
5ecd293d PH |
752 | ret |= apply_filter(path, src, len, dst, filter); |
753 | if (ret) { | |
754 | src = dst->buf; | |
755 | len = dst->len; | |
aa4ed402 | 756 | } |
c61dcff9 JH |
757 | crlf_action = input_crlf_action(crlf_action, eol_attr); |
758 | ret |= crlf_to_git(path, src, len, dst, crlf_action, checksafe); | |
5ecd293d PH |
759 | if (ret) { |
760 | src = dst->buf; | |
761 | len = dst->len; | |
6073ee85 | 762 | } |
5ecd293d | 763 | return ret | ident_to_git(path, src, len, dst, ident); |
35ebfd6a JH |
764 | } |
765 | ||
43dd2332 EB |
766 | static int convert_to_working_tree_internal(const char *path, const char *src, |
767 | size_t len, struct strbuf *dst, | |
768 | int normalizing) | |
35ebfd6a | 769 | { |
5ec3e670 | 770 | struct git_attr_check check[5]; |
c61dcff9 | 771 | enum crlf_action crlf_action = CRLF_GUESS; |
942e7747 | 772 | enum eol eol_attr = EOL_UNSET; |
5ecd293d | 773 | int ident = 0, ret = 0; |
cd8be6c9 | 774 | const char *filter = NULL; |
6073ee85 JH |
775 | |
776 | setup_convert_check(check); | |
3fed15f5 | 777 | if (!git_checkattr(path, ARRAY_SIZE(check), check)) { |
aa4ed402 | 778 | struct convert_driver *drv; |
c61dcff9 JH |
779 | crlf_action = git_path_check_crlf(path, check + 4); |
780 | if (crlf_action == CRLF_GUESS) | |
781 | crlf_action = git_path_check_crlf(path, check + 0); | |
3fed15f5 | 782 | ident = git_path_check_ident(path, check + 1); |
aa4ed402 | 783 | drv = git_path_check_convert(path, check + 2); |
942e7747 | 784 | eol_attr = git_path_check_eol(path, check + 3); |
aa4ed402 JH |
785 | if (drv && drv->smudge) |
786 | filter = drv->smudge; | |
6073ee85 | 787 | } |
3fed15f5 | 788 | |
5ecd293d PH |
789 | ret |= ident_to_worktree(path, src, len, dst, ident); |
790 | if (ret) { | |
791 | src = dst->buf; | |
792 | len = dst->len; | |
3fed15f5 | 793 | } |
43dd2332 EB |
794 | /* |
795 | * CRLF conversion can be skipped if normalizing, unless there | |
796 | * is a smudge filter. The filter might expect CRLFs. | |
797 | */ | |
798 | if (filter || !normalizing) { | |
c61dcff9 JH |
799 | crlf_action = input_crlf_action(crlf_action, eol_attr); |
800 | ret |= crlf_to_worktree(path, src, len, dst, crlf_action); | |
43dd2332 EB |
801 | if (ret) { |
802 | src = dst->buf; | |
803 | len = dst->len; | |
804 | } | |
aa4ed402 | 805 | } |
5ecd293d | 806 | return ret | apply_filter(path, src, len, dst, filter); |
35ebfd6a | 807 | } |
f217f0e8 | 808 | |
43dd2332 EB |
809 | int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst) |
810 | { | |
811 | return convert_to_working_tree_internal(path, src, len, dst, 0); | |
812 | } | |
813 | ||
f217f0e8 EB |
814 | int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst) |
815 | { | |
43dd2332 | 816 | int ret = convert_to_working_tree_internal(path, src, len, dst, 1); |
f217f0e8 EB |
817 | if (ret) { |
818 | src = dst->buf; | |
819 | len = dst->len; | |
820 | } | |
821 | return ret | convert_to_git(path, src, len, dst, 0); | |
822 | } |