1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
|
#include "common.h"
#include "repository.h"
#include "filebuf.h"
#include <ctype.h>
const char *git_attr__true = "[internal]__TRUE__";
const char *git_attr__false = "[internal]__FALSE__";
static int sort_by_hash_and_name(const void *a_raw, const void *b_raw);
static void git_attr_rule__clear(git_attr_rule *rule);
int git_attr_file__new(git_attr_file **attrs_ptr)
{
int error;
git_attr_file *attrs = NULL;
attrs = git__calloc(1, sizeof(git_attr_file));
if (attrs == NULL)
error = GIT_ENOMEM;
else
error = git_vector_init(&attrs->rules, 4, NULL);
if (error != GIT_SUCCESS) {
git__rethrow(error, "Could not allocate attribute storage");
git__free(attrs);
attrs = NULL;
}
*attrs_ptr = attrs;
return error;
}
int git_attr_file__set_path(
git_repository *repo, const char *path, git_attr_file *file)
{
if (file->path != NULL) {
git__free(file->path);
file->path = NULL;
}
if (repo == NULL)
file->path = git__strdup(path);
else {
const char *workdir = git_repository_workdir(repo);
if (workdir && git__prefixcmp(path, workdir) == 0)
file->path = git__strdup(path + strlen(workdir));
else
file->path = git__strdup(path);
}
return (file->path == NULL) ? GIT_ENOMEM : GIT_SUCCESS;
}
int git_attr_file__from_buffer(
git_repository *repo, const char *buffer, git_attr_file *attrs)
{
int error = GIT_SUCCESS;
const char *scan = NULL;
char *context = NULL;
git_attr_rule *rule = NULL;
assert(buffer && attrs);
scan = buffer;
if (attrs->path && git__suffixcmp(attrs->path, GIT_ATTR_FILE) == 0) {
context = git__strndup(attrs->path,
strlen(attrs->path) - strlen(GIT_ATTR_FILE));
if (!context) error = GIT_ENOMEM;
}
while (error == GIT_SUCCESS && *scan) {
/* allocate rule if needed */
if (!rule && !(rule = git__calloc(1, sizeof(git_attr_rule)))) {
error = GIT_ENOMEM;
break;
}
/* parse the next "pattern attr attr attr" line */
if (!(error = git_attr_fnmatch__parse(&rule->match, context, &scan)) &&
!(error = git_attr_assignment__parse(repo, &rule->assigns, &scan)))
{
if (rule->match.flags & GIT_ATTR_FNMATCH_MACRO)
/* should generate error/warning if this is coming from any
* file other than .gitattributes at repo root.
*/
error = git_attr_cache__insert_macro(repo, rule);
else
error = git_vector_insert(&attrs->rules, rule);
}
/* if the rule wasn't a pattern, on to the next */
if (error != GIT_SUCCESS) {
git_attr_rule__clear(rule); /* reset rule contents */
if (error == GIT_ENOTFOUND)
error = GIT_SUCCESS;
} else {
rule = NULL; /* vector now "owns" the rule */
}
}
git_attr_rule__free(rule);
git__free(context);
return error;
}
int git_attr_file__from_file(
git_repository *repo, const char *path, git_attr_file *file)
{
int error = GIT_SUCCESS;
git_fbuffer fbuf = GIT_FBUFFER_INIT;
assert(path && file);
if (file->path == NULL)
error = git_attr_file__set_path(repo, path, file);
if (error == GIT_SUCCESS &&
(error = git_futils_readbuffer(&fbuf, path)) == GIT_SUCCESS)
error = git_attr_file__from_buffer(repo, fbuf.data, file);
git_futils_freebuffer(&fbuf);
if (error != GIT_SUCCESS)
git__rethrow(error, "Could not open attribute file '%s'", path);
return error;
}
void git_attr_file__free(git_attr_file *file)
{
unsigned int i;
git_attr_rule *rule;
if (!file)
return;
git_vector_foreach(&file->rules, i, rule)
git_attr_rule__free(rule);
git_vector_free(&file->rules);
git__free(file->path);
file->path = NULL;
git__free(file);
}
unsigned long git_attr_file__name_hash(const char *name)
{
unsigned long h = 5381;
int c;
assert(name);
while ((c = (int)*name++) != 0)
h = ((h << 5) + h) + c;
return h;
}
int git_attr_file__lookup_one(
git_attr_file *file,
const git_attr_path *path,
const char *attr,
const char **value)
{
unsigned int i;
git_attr_name name;
git_attr_rule *rule;
*value = NULL;
name.name = attr;
name.name_hash = git_attr_file__name_hash(attr);
git_attr_file__foreach_matching_rule(file, path, i, rule) {
int pos = git_vector_bsearch(&rule->assigns, &name);
git_clearerror(); /* okay if search failed */
if (pos >= 0) {
*value = ((git_attr_assignment *)
git_vector_get(&rule->assigns, pos))->value;
break;
}
}
return GIT_SUCCESS;
}
int git_attr_fnmatch__match(
git_attr_fnmatch *match,
const git_attr_path *path)
{
int matched = FNM_NOMATCH;
if (match->flags & GIT_ATTR_FNMATCH_DIRECTORY && !path->is_dir)
return matched;
if (match->flags & GIT_ATTR_FNMATCH_FULLPATH)
matched = p_fnmatch(match->pattern, path->path, FNM_PATHNAME);
else if (path->is_dir)
matched = p_fnmatch(match->pattern, path->basename, FNM_LEADING_DIR);
else
matched = p_fnmatch(match->pattern, path->basename, 0);
return matched;
}
int git_attr_rule__match(
git_attr_rule *rule,
const git_attr_path *path)
{
int matched = git_attr_fnmatch__match(&rule->match, path);
if (rule->match.flags & GIT_ATTR_FNMATCH_NEGATIVE)
matched = (matched == GIT_SUCCESS) ? FNM_NOMATCH : GIT_SUCCESS;
return matched;
}
git_attr_assignment *git_attr_rule__lookup_assignment(
git_attr_rule *rule, const char *name)
{
int pos;
git_attr_name key;
key.name = name;
key.name_hash = git_attr_file__name_hash(name);
pos = git_vector_bsearch(&rule->assigns, &key);
git_clearerror(); /* okay if search failed */
return (pos >= 0) ? git_vector_get(&rule->assigns, pos) : NULL;
}
int git_attr_path__init(
git_attr_path *info, const char *path, const char *base)
{
assert(info && path);
info->path = path;
info->basename = strrchr(path, '/');
if (info->basename)
info->basename++;
if (!info->basename || !*info->basename)
info->basename = path;
if (base != NULL && git_path_root(path) < 0) {
git_buf full_path = GIT_BUF_INIT;
int error = git_buf_joinpath(&full_path, base, path);
if (error == GIT_SUCCESS)
info->is_dir = (git_path_isdir(full_path.ptr) == GIT_SUCCESS);
git_buf_free(&full_path);
return error;
}
info->is_dir = (git_path_isdir(path) == GIT_SUCCESS);
return GIT_SUCCESS;
}
/*
* From gitattributes(5):
*
* Patterns have the following format:
*
* - A blank line matches no files, so it can serve as a separator for
* readability.
*
* - A line starting with # serves as a comment.
*
* - An optional prefix ! which negates the pattern; any matching file
* excluded by a previous pattern will become included again. If a negated
* pattern matches, this will override lower precedence patterns sources.
*
* - If the pattern ends with a slash, it is removed for the purpose of the
* following description, but it would only find a match with a directory. In
* other words, foo/ will match a directory foo and paths underneath it, but
* will not match a regular file or a symbolic link foo (this is consistent
* with the way how pathspec works in general in git).
*
* - If the pattern does not contain a slash /, git treats it as a shell glob
* pattern and checks for a match against the pathname without leading
* directories.
*
* - Otherwise, git treats the pattern as a shell glob suitable for consumption
* by fnmatch(3) with the FNM_PATHNAME flag: wildcards in the pattern will
* not match a / in the pathname. For example, "Documentation/\*.html" matches
* "Documentation/git.html" but not "Documentation/ppc/ppc.html". A leading
* slash matches the beginning of the pathname; for example, "/\*.c" matches
* "cat-file.c" but not "mozilla-sha1/sha1.c".
*/
/*
* This will return GIT_SUCCESS if the spec was filled out,
* GIT_ENOTFOUND if the fnmatch does not require matching, or
* another error code there was an actual problem.
*/
int git_attr_fnmatch__parse(
git_attr_fnmatch *spec,
const char *source,
const char **base)
{
const char *pattern, *scan;
int slash_count;
assert(spec && base && *base);
pattern = *base;
while (isspace(*pattern)) pattern++;
if (!*pattern || *pattern == '#') {
*base = git__next_line(pattern);
return GIT_ENOTFOUND;
}
spec->flags = 0;
if (*pattern == '[') {
if (strncmp(pattern, "[attr]", 6) == 0) {
spec->flags = spec->flags | GIT_ATTR_FNMATCH_MACRO;
pattern += 6;
}
/* else a character range like [a-e]* which is accepted */
}
if (*pattern == '!') {
spec->flags = spec->flags | GIT_ATTR_FNMATCH_NEGATIVE;
pattern++;
}
slash_count = 0;
for (scan = pattern; *scan != '\0'; ++scan) {
/* scan until (non-escaped) white space */
if (isspace(*scan) && *(scan - 1) != '\\')
break;
if (*scan == '/') {
spec->flags = spec->flags | GIT_ATTR_FNMATCH_FULLPATH;
slash_count++;
}
}
*base = scan;
spec->length = scan - pattern;
if (pattern[spec->length - 1] == '/') {
spec->length--;
spec->flags = spec->flags | GIT_ATTR_FNMATCH_DIRECTORY;
if (--slash_count <= 0)
spec->flags = spec->flags & ~GIT_ATTR_FNMATCH_FULLPATH;
}
if ((spec->flags & GIT_ATTR_FNMATCH_FULLPATH) != 0 &&
source != NULL && git_path_root(pattern) < 0)
{
size_t sourcelen = strlen(source);
/* given an unrooted fullpath match from a file inside a repo,
* prefix the pattern with the relative directory of the source file
*/
spec->pattern = git__malloc(sourcelen + spec->length + 1);
if (spec->pattern) {
memcpy(spec->pattern, source, sourcelen);
memcpy(spec->pattern + sourcelen, pattern, spec->length);
spec->length += sourcelen;
spec->pattern[spec->length] = '\0';
}
} else {
spec->pattern = git__strndup(pattern, spec->length);
}
if (!spec->pattern) {
*base = git__next_line(pattern);
return GIT_ENOMEM;
} else {
/* strip '\' that might have be used for internal whitespace */
char *to = spec->pattern;
for (scan = spec->pattern; *scan; to++, scan++) {
if (*scan == '\\')
scan++; /* skip '\' but include next char */
if (to != scan)
*to = *scan;
}
if (to != scan) {
*to = '\0';
spec->length = (to - spec->pattern);
}
}
return GIT_SUCCESS;
}
static int sort_by_hash_and_name(const void *a_raw, const void *b_raw)
{
const git_attr_name *a = a_raw;
const git_attr_name *b = b_raw;
if (b->name_hash < a->name_hash)
return 1;
else if (b->name_hash > a->name_hash)
return -1;
else
return strcmp(b->name, a->name);
}
static void git_attr_assignment__free(git_attr_assignment *assign)
{
git__free(assign->name);
assign->name = NULL;
if (assign->is_allocated) {
git__free((void *)assign->value);
assign->value = NULL;
}
git__free(assign);
}
static int merge_assignments(void **old_raw, void *new_raw)
{
git_attr_assignment **old = (git_attr_assignment **)old_raw;
git_attr_assignment *new = (git_attr_assignment *)new_raw;
GIT_REFCOUNT_DEC(*old, git_attr_assignment__free);
*old = new;
return GIT_EEXISTS;
}
int git_attr_assignment__parse(
git_repository *repo,
git_vector *assigns,
const char **base)
{
int error = GIT_SUCCESS;
const char *scan = *base;
git_attr_assignment *assign = NULL;
assert(assigns && !assigns->length);
assigns->_cmp = sort_by_hash_and_name;
while (*scan && *scan != '\n' && error == GIT_SUCCESS) {
const char *name_start, *value_start;
/* skip leading blanks */
while (isspace(*scan) && *scan != '\n') scan++;
/* allocate assign if needed */
if (!assign) {
assign = git__calloc(1, sizeof(git_attr_assignment));
if (!assign) {
error = GIT_ENOMEM;
break;
}
GIT_REFCOUNT_INC(assign);
}
assign->name_hash = 5381;
assign->value = GIT_ATTR_TRUE;
assign->is_allocated = 0;
/* look for magic name prefixes */
if (*scan == '-') {
assign->value = GIT_ATTR_FALSE;
scan++;
} else if (*scan == '!') {
assign->value = NULL; /* explicit unspecified state */
scan++;
} else if (*scan == '#') /* comment rest of line */
break;
/* find the name */
name_start = scan;
while (*scan && !isspace(*scan) && *scan != '=') {
assign->name_hash =
((assign->name_hash << 5) + assign->name_hash) + *scan;
scan++;
}
if (scan == name_start) {
/* must have found lone prefix (" - ") or leading = ("=foo")
* or end of buffer -- advance until whitespace and continue
*/
while (*scan && !isspace(*scan)) scan++;
continue;
}
/* allocate permanent storage for name */
assign->name = git__strndup(name_start, scan - name_start);
if (!assign->name) {
error = GIT_ENOMEM;
break;
}
/* if there is an equals sign, find the value */
if (*scan == '=') {
for (value_start = ++scan; *scan && !isspace(*scan); ++scan);
/* if we found a value, allocate permanent storage for it */
if (scan > value_start) {
assign->value = git__strndup(value_start, scan - value_start);
if (!assign->value) {
error = GIT_ENOMEM;
break;
} else {
assign->is_allocated = 1;
}
}
}
/* expand macros (if given a repo with a macro cache) */
if (repo != NULL && assign->value == GIT_ATTR_TRUE) {
git_attr_rule *macro =
git_hashtable_lookup(repo->attrcache.macros, assign->name);
if (macro != NULL) {
unsigned int i;
git_attr_assignment *massign;
git_vector_foreach(¯o->assigns, i, massign) {
GIT_REFCOUNT_INC(massign);
error = git_vector_insert_sorted(
assigns, massign, &merge_assignments);
if (error == GIT_EEXISTS)
error = GIT_SUCCESS;
else if (error != GIT_SUCCESS)
break;
}
}
}
/* insert allocated assign into vector */
error = git_vector_insert_sorted(assigns, assign, &merge_assignments);
if (error == GIT_EEXISTS)
error = GIT_SUCCESS;
else if (error < GIT_SUCCESS)
break;
/* clear assign since it is now "owned" by the vector */
assign = NULL;
}
if (!assigns->length)
error = git__throw(GIT_ENOTFOUND, "No attribute assignments found for rule");
if (assign != NULL)
git_attr_assignment__free(assign);
*base = git__next_line(scan);
return error;
}
static void git_attr_rule__clear(git_attr_rule *rule)
{
unsigned int i;
git_attr_assignment *assign;
if (!rule)
return;
if (!(rule->match.flags & GIT_ATTR_FNMATCH_IGNORE)) {
git_vector_foreach(&rule->assigns, i, assign)
GIT_REFCOUNT_DEC(assign, git_attr_assignment__free);
git_vector_free(&rule->assigns);
}
git__free(rule->match.pattern);
rule->match.pattern = NULL;
rule->match.length = 0;
}
void git_attr_rule__free(git_attr_rule *rule)
{
git_attr_rule__clear(rule);
git__free(rule);
}
|