about summary refs log tree commit diff stats
path: root/shared.c
blob: 42b2ddc25ea90328fd3f2b08eb73929012df3098 (plain)
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
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
/* shared.c: global vars + some callback functions
 *
 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
 *
 * Licensed under GNU General Public License v2
 *   (see COPYING for full license text)
 */

#include "cgit.h"

struct cgit_repolist cgit_repolist;
struct cgit_context ctx;

int chk_zero(int result, char *msg)
{
	if (result != 0)
		die_errno("%s", msg);
	return result;
}

int chk_positive(int result, char *msg)
{
	if (result <= 0)
		die_errno("%s", msg);
	return result;
}

int chk_non_negative(int result, char *msg)
{
	if (result < 0)
		die_errno("%s", msg);
	return result;
}

char *cgit_default_repo_desc = "[no description]";
struct cgit_repo *cgit_add_repo(const char *url)
{
	struct cgit_repo *ret;

	if (++cgit_repolist.count > cgit_repolist.length) {
		if (cgit_repolist.length == 0)
			cgit_repolist.length = 8;
		else
			cgit_repolist.length *= 2;
		cgit_repolist.repos = xrealloc(cgit_repolist.repos,
					       cgit_repolist.length *
					       sizeof(struct cgit_repo));
	}

	ret = &cgit_repolist.repos[cgit_repolist.count-1];
	memset(ret, 0, sizeof(struct cgit_repo));
	ret->url = trim_end(url, '/');
	ret->name = ret->url;
	ret->path = NULL;
	ret->desc = cgit_default_repo_desc;
	ret->owner = NULL;
	ret->section = ctx.cfg.section;
	ret->snapshots = ctx.cfg.snapshots;
	ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
	ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
	ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
	ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
	ret->enable_subject_links = ctx.cfg.enable_subject_links;
	ret->max_stats = ctx.cfg.max_stats;
	ret->branch_sort = ctx.cfg.branch_sort;
	ret->commit_sort = ctx.cfg.commit_sort;
	ret->module_link = ctx.cfg.module_link;
	ret->readme = ctx.cfg.readme;
	ret->mtime = -1;
	ret->about_filter = ctx.cfg.about_filter;
	ret->commit_filter = ctx.cfg.commit_filter;
	ret->source_filter = ctx.cfg.source_filter;
	ret->email_filter = ctx.cfg.email_filter;
	ret->owner_filter = ctx.cfg.owner_filter;
	ret->clone_url = ctx.cfg.clone_url;
	ret->submodules.strdup_strings = 1;
	ret->hide = ret->ignore = 0;
	return ret;
}

struct cgit_repo *cgit_get_repoinfo(const char *url)
{
	int i;
	struct cgit_repo *repo;

	for (i = 0; i < cgit_repolist.count; i++) {
		repo = &cgit_repolist.repos[i];
		if (repo->ignore)
			continue;
		if (!strcmp(repo->url, url))
			return repo;
	}
	return NULL;
}

void *cgit_free_commitinfo(struct commitinfo *info)
{
	free(info->author);
	free(info->author_email);
	free(info->committer);
	free(info->committer_email);
	free(info->subject);
	free(info->msg);
	free(info->msg_encoding);
	free(info);
	return NULL;
}

char *trim_end(const char *str, char c)
{
	int len;

	if (str == NULL)
		return NULL;
	len = strlen(str);
	while (len > 0 && str[len - 1] == c)
		len--;
	if (len == 0)
		return NULL;
	return xstrndup(str, len);
}

char *ensure_end(const char *str, char c)
{
	size_t len = strlen(str);
	char *result;

	if (len && str[len - 1] == c)
		return xstrndup(str, len);

	result = xmalloc(len + 2);
	memcpy(result, str, len);
	result[len] = '/';
	result[len + 1] = '\0';
	return result;
}

void strbuf_ensure_end(struct strbuf *sb, char c)
{
	if (!sb->len || sb->buf[sb->len - 1] != c)
		strbuf_addch(sb, c);
}

char *strlpart(char *txt, int maxlen)
{
	char *result;

	if (!txt)
		return txt;

	if (strlen(txt) <= maxlen)
		return txt;
	result = xmalloc(maxlen + 1);
	memcpy(result, txt, maxlen - 3);
	result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
	result[maxlen] = '\0';
	return result;
}

char *strrpart(char *txt, int maxlen)
{
	char *result;

	if (!txt)
		return txt;

	if (strlen(txt) <= maxlen)
		return txt;
	result = xmalloc(maxlen + 1);
	memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
	result[0] = result[1] = result[2] = '.';
	return result;
}

void cgit_add_ref(struct reflist *list, struct refinfo *ref)
{
	size_t size;

	if (list->count >= list->alloc) {
		list->alloc += (list->alloc ? list->alloc : 4);
		size = list->alloc * sizeof(struct refinfo *);
		list->refs = xrealloc(list->refs, size);
	}
	list->refs[list->count++] = ref;
}

static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
{
	struct refinfo *ref;

	ref = xmalloc(sizeof (struct refinfo));
	ref->refname = xstrdup(refname);
	ref->object = parse_object(oid->hash);
	switch (ref->object->type) {
	case OBJ_TAG:
		ref->tag = cgit_parse_tag((struct tag *)ref->object);
		break;
	case OBJ_COMMIT:
		ref->commit = cgit_parse_commit((struct commit *)ref->object);
		break;
	}
	return ref;
}

static void cgit_free_taginfo(struct taginfo *tag)
{
	if (tag->tagger)
		free(tag->tagger);
	if (tag->tagger_email)
		free(tag->tagger_email);
	if (tag->msg)
		free(tag->msg);
	free(tag);
}

static void cgit_free_refinfo(struct refinfo *ref)
{
	if (ref->refname)
		free((char *)ref->refname);
	switch (ref->object->type) {
	case OBJ_TAG:
		cgit_free_taginfo(ref->tag);
		break;
	case OBJ_COMMIT:
		cgit_free_commitinfo(ref->commit);
		break;
	}
	free(ref);
}

void cgit_free_reflist_inner(struct reflist *list)
{
	int i;

	for (i = 0; i < list->count; i++) {
		cgit_free_refinfo(list->refs[i]);
	}
	free(list->refs);
}

int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
		  void *cb_data)
{
	struct reflist *list = (struct reflist *)cb_data;
	struct refinfo *info = cgit_mk_refinfo(refname, oid);

	if (info)
		cgit_add_ref(list, info);
	return 0;
}

void cgit_diff_tree_cb(struct diff_queue_struct *q,
		       struct diff_options *options, void *data)
{
	int i;

	for (i = 0; i < q->nr; i++) {
		if (q->queue[i]->status == 'U')
			continue;
		((filepair_fn)data)(q->queue[i]);
	}
}

static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
{
	enum object_type type;

	if (is_null_sha1(sha1)) {
		file->ptr = (char *)"";
		file->size = 0;
	} else {
		file->ptr = read_sha1_file(sha1, &type,
		                           (unsigned long *)&file->size);
	}
	return 1;
}

/*
 * Receive diff-buffers from xdiff and concatenate them as
 * needed across multiple callbacks.
 *
 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
 * ripped from git and modified to use globals instead of
 * a special callback-struct.
 */
static char *diffbuf = NULL;
static int buflen = 0;

static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
{
	int i;

	for (i = 0; i < nbuf; i++) {
		if (mb[i].ptr[mb[i].size-1] != '\n') {
			/* Incomplete line */
			diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
			memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
			buflen += mb[i].size;
			continue;
		}

		/* we have a complete line */
		if (!diffbuf) {
			((linediff_fn)priv)(mb[i].ptr, mb[i].size);
			continue;
		}
		diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
		memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
		((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
		free(diffbuf);
		diffbuf = NULL;
		buflen = 0;
	}
	if (diffbuf) {
		((linediff_fn)priv)(diffbuf, buflen);
		free(diffbuf);
		diffbuf = NULL;
		buflen = 0;
	}
	return 0;
}

int cgit_diff_files(const unsigned char *old_sha1,
		    const unsigned char *new_sha1, unsigned long *old_size,
		    unsigned long *new_size, int *binary, int context,
		    int ignorews, linediff_fn fn)
{
	mmfile_t file1, file2;
	xpparam_t diff_params;
	xdemitconf_t emit_params;
	xdemitcb_t emit_cb;

	if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
		return 1;

	*old_size = file1.size;
	*new_size = file2.size;

	if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
	    (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
		*binary = 1;
		if (file1.size)
			free(file1.ptr);
		if (file2.size)
			free(file2.ptr);
		return 0;
	}

	memset(&diff_params, 0, sizeof(diff_params));
	memset(&emit_params, 0, sizeof(emit_params));
	memset(&emit_cb, 0, sizeof(emit_cb));
	diff_params.flags = XDF_NEED_MINIMAL;
	if (ignorews)
		diff_params.flags |= XDF_IGNORE_WHITESPACE;
	emit_params.ctxlen = context > 0 ? context : 3;
	emit_params.flags = XDL_EMIT_FUNCNAMES;
	emit_cb.outf = filediff_cb;
	emit_cb.priv = fn;
	xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
	if (file1.size)
		free(file1.ptr);
	if (file2.size)
		free(file2.ptr);
	return 0;
}

void cgit_diff_tree(const unsigned char *old_sha1,
		    const unsigned char *new_sha1,
		    filepair_fn fn, const char *prefix, int ignorews)
{
	struct diff_options opt;
	struct pathspec_item item;

	memset(&item, 0, sizeof(item));
	diff_setup(&opt);
	opt.output_format = DIFF_FORMAT_CALLBACK;
	opt.detect_rename = 1;
	opt.rename_limit = ctx.cfg.renamelimit;
	DIFF_OPT_SET(&opt, RECURSIVE);
	if (ignorews)
		DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
	opt.format_callback = cgit_diff_tree_cb;
	opt.format_callback_data = fn;
	if (prefix) {
		item.match = prefix;
		item.len = strlen(prefix);
		opt.pathspec.nr = 1;
		opt.pathspec.items = &item;
	}
	diff_setup_done(&opt);

	if (old_sha1 && !is_null_sha1(old_sha1))
		diff_tree_sha1(old_sha1, new_sha1, "", &opt);
	else
		diff_root_tree_sha1(new_sha1, "", &opt);
	diffcore_std(&opt);
	diff_flush(&opt);
}

void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
{
	unsigned char *old_sha1 = NULL;

	if (commit->parents)
		old_sha1 = commit->parents->item->object.oid.hash;
	cgit_diff_tree(old_sha1, commit->object.oid.hash, fn, prefix,
		       ctx.qry.ignorews);
}

int cgit_parse_snapshots_mask(const char *str)
{
	struct string_list tokens = STRING_LIST_INIT_DUP;
	struct string_list_item *item;
	const struct cgit_snapshot_format *f;
	int rv = 0;

	/* favor legacy setting */
	if (atoi(str))
		return 1;

	string_list_split(&tokens, str, ' ', -1);
	string_list_remove_empty_items(&tokens, 0);

	for_each_string_list_item(item, &tokens) {
		for (f = cgit_snapshot_formats; f->suffix; f++) {
			if (!strcmp(item->string, f->suffix) ||
			    !strcmp(item->string, f->suffix + 1)) {
				rv |= f->bit;
				break;
			}
		}
	}

	string_list_clear(&tokens, 0);
	return rv;
}

typedef struct {
	char * name;
	char * value;
} cgit_env_var;

void cgit_prepare_repo_env(struct cgit_repo * repo)
{
	cgit_env_var env_vars[] = {
		{ .name = "CGIT_REPO_URL", .value = repo->url },
		{ .name = "CGIT_REPO_NAME", .value = repo->name },
		{ .name = "CGIT_REPO_PATH", .value = repo->path },
		{ .name = "CGIT_REPO_OWNER", .value = repo->owner },
		{ .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
		{ .name = "CGIT_REPO_SECTION", .value = repo->section },
		{ .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
	};
	int env_var_count = ARRAY_SIZE(env_vars);
	cgit_env_var *p, *q;
	static char *warn = "cgit warning: failed to set env: %s=%s\n";

	p = env_vars;
	q = p + env_var_count;
	for (; p < q; p++)
		if (p->value && setenv(p->name, p->value, 1))
			fprintf(stderr, warn, p->name, p->value);
}

/* Read the content of the specified file into a newly allocated buffer,
 * zeroterminate the buffer and return 0 on success, errno otherwise.
 */
int readfile(const char *path, char **buf, size_t *size)
{
	int fd, e;
	struct stat st;

	fd = open(path, O_RDONLY);
	if (fd == -1)
		return errno;
	if (fstat(fd, &st)) {
		e = errno;
		close(fd);
		return e;
	}
	if (!S_ISREG(st.st_mode)) {
		close(fd);
		return EISDIR;
	}
	*buf = xmalloc(st.st_size + 1);
	*size = read_in_full(fd, *buf, st.st_size);
	e = errno;
	(*buf)[*size] = '\0';
	close(fd);
	return (*size == st.st_size ? 0 : e);
}

static int is_token_char(char c)
{
	return isalnum(c) || c == '_';
}

/* Replace name with getenv(name), return pointer to zero-terminating char
 */
static char *expand_macro(char *name, int maxlength)
{
	char *value;
	int len;

	len = 0;
	value = getenv(name);
	if (value) {
		len = strlen(value);
		if (len > maxlength)
			len = maxlength;
		strncpy(name, value, len);
	}
	return name + len;
}

#define EXPBUFSIZE (1024 * 8)

/* Replace all tokens prefixed by '$' in the specified text with the
 * value of the named environment variable.
 * NB: the return value is a static buffer, i.e. it must be strdup'd
 * by the caller.
 */
char *expand_macros(const char *txt)
{
	static char result[EXPBUFSIZE];
	char *p, *start;
	int len;

	p = result;
	start = NULL;
	while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
		*p = *txt;
		if (start) {
			if (!is_token_char(*txt)) {
				if (p - start > 0) {
					*p = '\0';
					len = result + EXPBUFSIZE - start - 1;
					p = expand_macro(start, len) - 1;
				}
				start = NULL;
				txt--;
			}
			p++;
			txt++;
			continue;
		}
		if (*txt == '$') {
			start = p;
			txt++;
			continue;
		}
		p++;
		txt++;
	}
	*p = '\0';
	if (start && p - start > 0) {
		len = result + EXPBUFSIZE - start - 1;
		p = expand_macro(start, len);
		*p = '\0';
	}
	return result;
}

char *get_mimetype_for_filename(const char *filename)
{
	char *ext, *mimetype, *token, line[1024], *saveptr;
	FILE *file;
	struct string_list_item *mime;

	if (!filename)
		return NULL;

	ext = strrchr(filename, '.');
	if (!ext)
		return NULL;
	++ext;
	if (!ext[0])
		return NULL;
	mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
	if (mime)
		return xstrdup(mime->util);

	if (!ctx.cfg.mimetype_file)
		return NULL;
	file = fopen(ctx.cfg.mimetype_file, "r");
	if (!file)
		return NULL;
	while (fgets(line, sizeof(line), file)) {
		if (!line[0] || line[0] == '#')
			continue;
		mimetype = strtok_r(line, " \t\r\n", &saveptr);
		while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
			if (!strcasecmp(ext, token)) {
				fclose(file);
				return xstrdup(mimetype);
			}
		}
	}
	fclose(file);
	return NULL;
}