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