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