shared.c (view raw)
1/* shared.c: global vars + some callback functions
2 *
3 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
4 *
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
7 */
8
9#include "cgit.h"
10
11struct cgit_repolist cgit_repolist;
12struct cgit_context ctx;
13
14int chk_zero(int result, char *msg)
15{
16 if (result != 0)
17 die_errno("%s", msg);
18 return result;
19}
20
21int chk_positive(int result, char *msg)
22{
23 if (result <= 0)
24 die_errno("%s", msg);
25 return result;
26}
27
28int chk_non_negative(int result, char *msg)
29{
30 if (result < 0)
31 die_errno("%s", msg);
32 return result;
33}
34
35char *cgit_default_repo_desc = "[no description]";
36struct cgit_repo *cgit_add_repo(const char *url)
37{
38 struct cgit_repo *ret;
39
40 if (++cgit_repolist.count > cgit_repolist.length) {
41 if (cgit_repolist.length == 0)
42 cgit_repolist.length = 8;
43 else
44 cgit_repolist.length *= 2;
45 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
46 cgit_repolist.length *
47 sizeof(struct cgit_repo));
48 }
49
50 ret = &cgit_repolist.repos[cgit_repolist.count-1];
51 memset(ret, 0, sizeof(struct cgit_repo));
52 ret->url = trim_end(url, '/');
53 ret->name = ret->url;
54 ret->path = NULL;
55 ret->desc = cgit_default_repo_desc;
56 ret->owner = NULL;
57 ret->section = ctx.cfg.section;
58 ret->snapshots = ctx.cfg.snapshots;
59 ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
60 ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
61 ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
62 ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
63 ret->enable_subject_links = ctx.cfg.enable_subject_links;
64 ret->max_stats = ctx.cfg.max_stats;
65 ret->branch_sort = ctx.cfg.branch_sort;
66 ret->commit_sort = ctx.cfg.commit_sort;
67 ret->module_link = ctx.cfg.module_link;
68 ret->readme = ctx.cfg.readme;
69 ret->mtime = -1;
70 ret->about_filter = ctx.cfg.about_filter;
71 ret->commit_filter = ctx.cfg.commit_filter;
72 ret->source_filter = ctx.cfg.source_filter;
73 ret->email_filter = ctx.cfg.email_filter;
74 ret->owner_filter = ctx.cfg.owner_filter;
75 ret->clone_url = ctx.cfg.clone_url;
76 ret->submodules.strdup_strings = 1;
77 ret->hide = ret->ignore = 0;
78 return ret;
79}
80
81struct cgit_repo *cgit_get_repoinfo(const char *url)
82{
83 int i;
84 struct cgit_repo *repo;
85
86 for (i = 0; i < cgit_repolist.count; i++) {
87 repo = &cgit_repolist.repos[i];
88 if (repo->ignore)
89 continue;
90 if (!strcmp(repo->url, url))
91 return repo;
92 }
93 return NULL;
94}
95
96void *cgit_free_commitinfo(struct commitinfo *info)
97{
98 free(info->author);
99 free(info->author_email);
100 free(info->committer);
101 free(info->committer_email);
102 free(info->subject);
103 free(info->msg);
104 free(info->msg_encoding);
105 free(info);
106 return NULL;
107}
108
109char *trim_end(const char *str, char c)
110{
111 int len;
112
113 if (str == NULL)
114 return NULL;
115 len = strlen(str);
116 while (len > 0 && str[len - 1] == c)
117 len--;
118 if (len == 0)
119 return NULL;
120 return xstrndup(str, len);
121}
122
123char *ensure_end(const char *str, char c)
124{
125 size_t len = strlen(str);
126 char *result;
127
128 if (len && str[len - 1] == c)
129 return xstrndup(str, len);
130
131 result = xmalloc(len + 2);
132 memcpy(result, str, len);
133 result[len] = '/';
134 result[len + 1] = '\0';
135 return result;
136}
137
138void strbuf_ensure_end(struct strbuf *sb, char c)
139{
140 if (!sb->len || sb->buf[sb->len - 1] != c)
141 strbuf_addch(sb, c);
142}
143
144char *strlpart(char *txt, int maxlen)
145{
146 char *result;
147
148 if (!txt)
149 return txt;
150
151 if (strlen(txt) <= maxlen)
152 return txt;
153 result = xmalloc(maxlen + 1);
154 memcpy(result, txt, maxlen - 3);
155 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
156 result[maxlen] = '\0';
157 return result;
158}
159
160char *strrpart(char *txt, int maxlen)
161{
162 char *result;
163
164 if (!txt)
165 return txt;
166
167 if (strlen(txt) <= maxlen)
168 return txt;
169 result = xmalloc(maxlen + 1);
170 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
171 result[0] = result[1] = result[2] = '.';
172 return result;
173}
174
175void cgit_add_ref(struct reflist *list, struct refinfo *ref)
176{
177 size_t size;
178
179 if (list->count >= list->alloc) {
180 list->alloc += (list->alloc ? list->alloc : 4);
181 size = list->alloc * sizeof(struct refinfo *);
182 list->refs = xrealloc(list->refs, size);
183 }
184 list->refs[list->count++] = ref;
185}
186
187static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
188{
189 struct refinfo *ref;
190
191 ref = xmalloc(sizeof (struct refinfo));
192 ref->refname = xstrdup(refname);
193 ref->object = parse_object(oid->hash);
194 switch (ref->object->type) {
195 case OBJ_TAG:
196 ref->tag = cgit_parse_tag((struct tag *)ref->object);
197 break;
198 case OBJ_COMMIT:
199 ref->commit = cgit_parse_commit((struct commit *)ref->object);
200 break;
201 }
202 return ref;
203}
204
205static void cgit_free_taginfo(struct taginfo *tag)
206{
207 if (tag->tagger)
208 free(tag->tagger);
209 if (tag->tagger_email)
210 free(tag->tagger_email);
211 if (tag->msg)
212 free(tag->msg);
213 free(tag);
214}
215
216static void cgit_free_refinfo(struct refinfo *ref)
217{
218 if (ref->refname)
219 free((char *)ref->refname);
220 switch (ref->object->type) {
221 case OBJ_TAG:
222 cgit_free_taginfo(ref->tag);
223 break;
224 case OBJ_COMMIT:
225 cgit_free_commitinfo(ref->commit);
226 break;
227 }
228 free(ref);
229}
230
231void cgit_free_reflist_inner(struct reflist *list)
232{
233 int i;
234
235 for (i = 0; i < list->count; i++) {
236 cgit_free_refinfo(list->refs[i]);
237 }
238 free(list->refs);
239}
240
241int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
242 void *cb_data)
243{
244 struct reflist *list = (struct reflist *)cb_data;
245 struct refinfo *info = cgit_mk_refinfo(refname, oid);
246
247 if (info)
248 cgit_add_ref(list, info);
249 return 0;
250}
251
252void cgit_diff_tree_cb(struct diff_queue_struct *q,
253 struct diff_options *options, void *data)
254{
255 int i;
256
257 for (i = 0; i < q->nr; i++) {
258 if (q->queue[i]->status == 'U')
259 continue;
260 ((filepair_fn)data)(q->queue[i]);
261 }
262}
263
264static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
265{
266 enum object_type type;
267
268 if (is_null_sha1(sha1)) {
269 file->ptr = (char *)"";
270 file->size = 0;
271 } else {
272 file->ptr = read_sha1_file(sha1, &type,
273 (unsigned long *)&file->size);
274 }
275 return 1;
276}
277
278/*
279 * Receive diff-buffers from xdiff and concatenate them as
280 * needed across multiple callbacks.
281 *
282 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
283 * ripped from git and modified to use globals instead of
284 * a special callback-struct.
285 */
286static char *diffbuf = NULL;
287static int buflen = 0;
288
289static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
290{
291 int i;
292
293 for (i = 0; i < nbuf; i++) {
294 if (mb[i].ptr[mb[i].size-1] != '\n') {
295 /* Incomplete line */
296 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
297 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
298 buflen += mb[i].size;
299 continue;
300 }
301
302 /* we have a complete line */
303 if (!diffbuf) {
304 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
305 continue;
306 }
307 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
308 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
309 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
310 free(diffbuf);
311 diffbuf = NULL;
312 buflen = 0;
313 }
314 if (diffbuf) {
315 ((linediff_fn)priv)(diffbuf, buflen);
316 free(diffbuf);
317 diffbuf = NULL;
318 buflen = 0;
319 }
320 return 0;
321}
322
323int cgit_diff_files(const unsigned char *old_sha1,
324 const unsigned char *new_sha1, unsigned long *old_size,
325 unsigned long *new_size, int *binary, int context,
326 int ignorews, linediff_fn fn)
327{
328 mmfile_t file1, file2;
329 xpparam_t diff_params;
330 xdemitconf_t emit_params;
331 xdemitcb_t emit_cb;
332
333 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
334 return 1;
335
336 *old_size = file1.size;
337 *new_size = file2.size;
338
339 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
340 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
341 *binary = 1;
342 if (file1.size)
343 free(file1.ptr);
344 if (file2.size)
345 free(file2.ptr);
346 return 0;
347 }
348
349 memset(&diff_params, 0, sizeof(diff_params));
350 memset(&emit_params, 0, sizeof(emit_params));
351 memset(&emit_cb, 0, sizeof(emit_cb));
352 diff_params.flags = XDF_NEED_MINIMAL;
353 if (ignorews)
354 diff_params.flags |= XDF_IGNORE_WHITESPACE;
355 emit_params.ctxlen = context > 0 ? context : 3;
356 emit_params.flags = XDL_EMIT_FUNCNAMES;
357 emit_cb.outf = filediff_cb;
358 emit_cb.priv = fn;
359 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
360 if (file1.size)
361 free(file1.ptr);
362 if (file2.size)
363 free(file2.ptr);
364 return 0;
365}
366
367void cgit_diff_tree(const unsigned char *old_sha1,
368 const unsigned char *new_sha1,
369 filepair_fn fn, const char *prefix, int ignorews)
370{
371 struct diff_options opt;
372 struct pathspec_item item;
373
374 memset(&item, 0, sizeof(item));
375 diff_setup(&opt);
376 opt.output_format = DIFF_FORMAT_CALLBACK;
377 opt.detect_rename = 1;
378 opt.rename_limit = ctx.cfg.renamelimit;
379 DIFF_OPT_SET(&opt, RECURSIVE);
380 if (ignorews)
381 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
382 opt.format_callback = cgit_diff_tree_cb;
383 opt.format_callback_data = fn;
384 if (prefix) {
385 item.match = prefix;
386 item.len = strlen(prefix);
387 opt.pathspec.nr = 1;
388 opt.pathspec.items = &item;
389 }
390 diff_setup_done(&opt);
391
392 if (old_sha1 && !is_null_sha1(old_sha1))
393 diff_tree_sha1(old_sha1, new_sha1, "", &opt);
394 else
395 diff_root_tree_sha1(new_sha1, "", &opt);
396 diffcore_std(&opt);
397 diff_flush(&opt);
398}
399
400void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
401{
402 unsigned char *old_sha1 = NULL;
403
404 if (commit->parents)
405 old_sha1 = commit->parents->item->object.oid.hash;
406 cgit_diff_tree(old_sha1, commit->object.oid.hash, fn, prefix,
407 ctx.qry.ignorews);
408}
409
410int cgit_parse_snapshots_mask(const char *str)
411{
412 struct string_list tokens = STRING_LIST_INIT_DUP;
413 struct string_list_item *item;
414 const struct cgit_snapshot_format *f;
415 int rv = 0;
416
417 /* favor legacy setting */
418 if (atoi(str))
419 return 1;
420
421 string_list_split(&tokens, str, ' ', -1);
422 string_list_remove_empty_items(&tokens, 0);
423
424 for_each_string_list_item(item, &tokens) {
425 for (f = cgit_snapshot_formats; f->suffix; f++) {
426 if (!strcmp(item->string, f->suffix) ||
427 !strcmp(item->string, f->suffix + 1)) {
428 rv |= f->bit;
429 break;
430 }
431 }
432 }
433
434 string_list_clear(&tokens, 0);
435 return rv;
436}
437
438typedef struct {
439 char * name;
440 char * value;
441} cgit_env_var;
442
443void cgit_prepare_repo_env(struct cgit_repo * repo)
444{
445 cgit_env_var env_vars[] = {
446 { .name = "CGIT_REPO_URL", .value = repo->url },
447 { .name = "CGIT_REPO_NAME", .value = repo->name },
448 { .name = "CGIT_REPO_PATH", .value = repo->path },
449 { .name = "CGIT_REPO_OWNER", .value = repo->owner },
450 { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
451 { .name = "CGIT_REPO_SECTION", .value = repo->section },
452 { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
453 };
454 int env_var_count = ARRAY_SIZE(env_vars);
455 cgit_env_var *p, *q;
456 static char *warn = "cgit warning: failed to set env: %s=%s\n";
457
458 p = env_vars;
459 q = p + env_var_count;
460 for (; p < q; p++)
461 if (p->value && setenv(p->name, p->value, 1))
462 fprintf(stderr, warn, p->name, p->value);
463}
464
465/* Read the content of the specified file into a newly allocated buffer,
466 * zeroterminate the buffer and return 0 on success, errno otherwise.
467 */
468int readfile(const char *path, char **buf, size_t *size)
469{
470 int fd, e;
471 struct stat st;
472
473 fd = open(path, O_RDONLY);
474 if (fd == -1)
475 return errno;
476 if (fstat(fd, &st)) {
477 e = errno;
478 close(fd);
479 return e;
480 }
481 if (!S_ISREG(st.st_mode)) {
482 close(fd);
483 return EISDIR;
484 }
485 *buf = xmalloc(st.st_size + 1);
486 *size = read_in_full(fd, *buf, st.st_size);
487 e = errno;
488 (*buf)[*size] = '\0';
489 close(fd);
490 return (*size == st.st_size ? 0 : e);
491}
492
493static int is_token_char(char c)
494{
495 return isalnum(c) || c == '_';
496}
497
498/* Replace name with getenv(name), return pointer to zero-terminating char
499 */
500static char *expand_macro(char *name, int maxlength)
501{
502 char *value;
503 int len;
504
505 len = 0;
506 value = getenv(name);
507 if (value) {
508 len = strlen(value);
509 if (len > maxlength)
510 len = maxlength;
511 strncpy(name, value, len);
512 }
513 return name + len;
514}
515
516#define EXPBUFSIZE (1024 * 8)
517
518/* Replace all tokens prefixed by '$' in the specified text with the
519 * value of the named environment variable.
520 * NB: the return value is a static buffer, i.e. it must be strdup'd
521 * by the caller.
522 */
523char *expand_macros(const char *txt)
524{
525 static char result[EXPBUFSIZE];
526 char *p, *start;
527 int len;
528
529 p = result;
530 start = NULL;
531 while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
532 *p = *txt;
533 if (start) {
534 if (!is_token_char(*txt)) {
535 if (p - start > 0) {
536 *p = '\0';
537 len = result + EXPBUFSIZE - start - 1;
538 p = expand_macro(start, len) - 1;
539 }
540 start = NULL;
541 txt--;
542 }
543 p++;
544 txt++;
545 continue;
546 }
547 if (*txt == '$') {
548 start = p;
549 txt++;
550 continue;
551 }
552 p++;
553 txt++;
554 }
555 *p = '\0';
556 if (start && p - start > 0) {
557 len = result + EXPBUFSIZE - start - 1;
558 p = expand_macro(start, len);
559 *p = '\0';
560 }
561 return result;
562}
563
564char *get_mimetype_for_filename(const char *filename)
565{
566 char *ext, *mimetype, *token, line[1024], *saveptr;
567 FILE *file;
568 struct string_list_item *mime;
569
570 if (!filename)
571 return NULL;
572
573 ext = strrchr(filename, '.');
574 if (!ext)
575 return NULL;
576 ++ext;
577 if (!ext[0])
578 return NULL;
579 mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
580 if (mime)
581 return xstrdup(mime->util);
582
583 if (!ctx.cfg.mimetype_file)
584 return NULL;
585 file = fopen(ctx.cfg.mimetype_file, "r");
586 if (!file)
587 return NULL;
588 while (fgets(line, sizeof(line), file)) {
589 if (!line[0] || line[0] == '#')
590 continue;
591 mimetype = strtok_r(line, " \t\r\n", &saveptr);
592 while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
593 if (!strcasecmp(ext, token)) {
594 fclose(file);
595 return xstrdup(mimetype);
596 }
597 }
598 }
599 fclose(file);
600 return NULL;
601}