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 return NULL;
109}
110
111char *trim_end(const char *str, char c)
112{
113 int len;
114
115 if (str == NULL)
116 return NULL;
117 len = strlen(str);
118 while (len > 0 && str[len - 1] == c)
119 len--;
120 if (len == 0)
121 return NULL;
122 return xstrndup(str, len);
123}
124
125char *ensure_end(const char *str, char c)
126{
127 size_t len = strlen(str);
128 char *result;
129
130 if (len && str[len - 1] == c)
131 return xstrndup(str, len);
132
133 result = xmalloc(len + 2);
134 memcpy(result, str, len);
135 result[len] = '/';
136 result[len + 1] = '\0';
137 return result;
138}
139
140void strbuf_ensure_end(struct strbuf *sb, char c)
141{
142 if (!sb->len || sb->buf[sb->len - 1] != c)
143 strbuf_addch(sb, c);
144}
145
146char *strlpart(char *txt, int maxlen)
147{
148 char *result;
149
150 if (!txt)
151 return txt;
152
153 if (strlen(txt) <= maxlen)
154 return txt;
155 result = xmalloc(maxlen + 1);
156 memcpy(result, txt, maxlen - 3);
157 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
158 result[maxlen] = '\0';
159 return result;
160}
161
162char *strrpart(char *txt, int maxlen)
163{
164 char *result;
165
166 if (!txt)
167 return txt;
168
169 if (strlen(txt) <= maxlen)
170 return txt;
171 result = xmalloc(maxlen + 1);
172 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
173 result[0] = result[1] = result[2] = '.';
174 return result;
175}
176
177void cgit_add_ref(struct reflist *list, struct refinfo *ref)
178{
179 size_t size;
180
181 if (list->count >= list->alloc) {
182 list->alloc += (list->alloc ? list->alloc : 4);
183 size = list->alloc * sizeof(struct refinfo *);
184 list->refs = xrealloc(list->refs, size);
185 }
186 list->refs[list->count++] = ref;
187}
188
189static struct refinfo *cgit_mk_refinfo(const char *refname, const struct object_id *oid)
190{
191 struct refinfo *ref;
192
193 ref = xmalloc(sizeof (struct refinfo));
194 ref->refname = xstrdup(refname);
195 ref->object = parse_object(oid->hash);
196 switch (ref->object->type) {
197 case OBJ_TAG:
198 ref->tag = cgit_parse_tag((struct tag *)ref->object);
199 break;
200 case OBJ_COMMIT:
201 ref->commit = cgit_parse_commit((struct commit *)ref->object);
202 break;
203 }
204 return ref;
205}
206
207static void cgit_free_taginfo(struct taginfo *tag)
208{
209 if (tag->tagger)
210 free(tag->tagger);
211 if (tag->tagger_email)
212 free(tag->tagger_email);
213 if (tag->msg)
214 free(tag->msg);
215 free(tag);
216}
217
218static void cgit_free_refinfo(struct refinfo *ref)
219{
220 if (ref->refname)
221 free((char *)ref->refname);
222 switch (ref->object->type) {
223 case OBJ_TAG:
224 cgit_free_taginfo(ref->tag);
225 break;
226 case OBJ_COMMIT:
227 cgit_free_commitinfo(ref->commit);
228 break;
229 }
230 free(ref);
231}
232
233void cgit_free_reflist_inner(struct reflist *list)
234{
235 int i;
236
237 for (i = 0; i < list->count; i++) {
238 cgit_free_refinfo(list->refs[i]);
239 }
240 free(list->refs);
241}
242
243int cgit_refs_cb(const char *refname, const struct object_id *oid, int flags,
244 void *cb_data)
245{
246 struct reflist *list = (struct reflist *)cb_data;
247 struct refinfo *info = cgit_mk_refinfo(refname, oid);
248
249 if (info)
250 cgit_add_ref(list, info);
251 return 0;
252}
253
254void cgit_diff_tree_cb(struct diff_queue_struct *q,
255 struct diff_options *options, void *data)
256{
257 int i;
258
259 for (i = 0; i < q->nr; i++) {
260 if (q->queue[i]->status == 'U')
261 continue;
262 ((filepair_fn)data)(q->queue[i]);
263 }
264}
265
266static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
267{
268 enum object_type type;
269
270 if (is_null_sha1(sha1)) {
271 file->ptr = (char *)"";
272 file->size = 0;
273 } else {
274 file->ptr = read_sha1_file(sha1, &type,
275 (unsigned long *)&file->size);
276 }
277 return 1;
278}
279
280/*
281 * Receive diff-buffers from xdiff and concatenate them as
282 * needed across multiple callbacks.
283 *
284 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
285 * ripped from git and modified to use globals instead of
286 * a special callback-struct.
287 */
288static char *diffbuf = NULL;
289static int buflen = 0;
290
291static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
292{
293 int i;
294
295 for (i = 0; i < nbuf; i++) {
296 if (mb[i].ptr[mb[i].size-1] != '\n') {
297 /* Incomplete line */
298 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
299 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
300 buflen += mb[i].size;
301 continue;
302 }
303
304 /* we have a complete line */
305 if (!diffbuf) {
306 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
307 continue;
308 }
309 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
310 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
311 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
312 free(diffbuf);
313 diffbuf = NULL;
314 buflen = 0;
315 }
316 if (diffbuf) {
317 ((linediff_fn)priv)(diffbuf, buflen);
318 free(diffbuf);
319 diffbuf = NULL;
320 buflen = 0;
321 }
322 return 0;
323}
324
325int cgit_diff_files(const unsigned char *old_sha1,
326 const unsigned char *new_sha1, unsigned long *old_size,
327 unsigned long *new_size, int *binary, int context,
328 int ignorews, linediff_fn fn)
329{
330 mmfile_t file1, file2;
331 xpparam_t diff_params;
332 xdemitconf_t emit_params;
333 xdemitcb_t emit_cb;
334
335 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
336 return 1;
337
338 *old_size = file1.size;
339 *new_size = file2.size;
340
341 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
342 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
343 *binary = 1;
344 if (file1.size)
345 free(file1.ptr);
346 if (file2.size)
347 free(file2.ptr);
348 return 0;
349 }
350
351 memset(&diff_params, 0, sizeof(diff_params));
352 memset(&emit_params, 0, sizeof(emit_params));
353 memset(&emit_cb, 0, sizeof(emit_cb));
354 diff_params.flags = XDF_NEED_MINIMAL;
355 if (ignorews)
356 diff_params.flags |= XDF_IGNORE_WHITESPACE;
357 emit_params.ctxlen = context > 0 ? context : 3;
358 emit_params.flags = XDL_EMIT_FUNCNAMES;
359 emit_cb.outf = filediff_cb;
360 emit_cb.priv = fn;
361 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
362 if (file1.size)
363 free(file1.ptr);
364 if (file2.size)
365 free(file2.ptr);
366 return 0;
367}
368
369void cgit_diff_tree(const unsigned char *old_sha1,
370 const unsigned char *new_sha1,
371 filepair_fn fn, const char *prefix, int ignorews)
372{
373 struct diff_options opt;
374 struct pathspec_item item;
375
376 memset(&item, 0, sizeof(item));
377 diff_setup(&opt);
378 opt.output_format = DIFF_FORMAT_CALLBACK;
379 opt.detect_rename = 1;
380 opt.rename_limit = ctx.cfg.renamelimit;
381 DIFF_OPT_SET(&opt, RECURSIVE);
382 if (ignorews)
383 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
384 opt.format_callback = cgit_diff_tree_cb;
385 opt.format_callback_data = fn;
386 if (prefix) {
387 item.match = prefix;
388 item.len = strlen(prefix);
389 opt.pathspec.nr = 1;
390 opt.pathspec.items = &item;
391 }
392 diff_setup_done(&opt);
393
394 if (old_sha1 && !is_null_sha1(old_sha1))
395 diff_tree_sha1(old_sha1, new_sha1, "", &opt);
396 else
397 diff_root_tree_sha1(new_sha1, "", &opt);
398 diffcore_std(&opt);
399 diff_flush(&opt);
400}
401
402void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
403{
404 unsigned char *old_sha1 = NULL;
405
406 if (commit->parents)
407 old_sha1 = commit->parents->item->object.oid.hash;
408 cgit_diff_tree(old_sha1, commit->object.oid.hash, fn, prefix,
409 ctx.qry.ignorews);
410}
411
412int cgit_parse_snapshots_mask(const char *str)
413{
414 struct string_list tokens = STRING_LIST_INIT_DUP;
415 struct string_list_item *item;
416 const struct cgit_snapshot_format *f;
417 int rv = 0;
418
419 /* favor legacy setting */
420 if (atoi(str))
421 return 1;
422
423 string_list_split(&tokens, str, ' ', -1);
424 string_list_remove_empty_items(&tokens, 0);
425
426 for_each_string_list_item(item, &tokens) {
427 for (f = cgit_snapshot_formats; f->suffix; f++) {
428 if (!strcmp(item->string, f->suffix) ||
429 !strcmp(item->string, f->suffix + 1)) {
430 rv |= f->bit;
431 break;
432 }
433 }
434 }
435
436 string_list_clear(&tokens, 0);
437 return rv;
438}
439
440typedef struct {
441 char * name;
442 char * value;
443} cgit_env_var;
444
445void cgit_prepare_repo_env(struct cgit_repo * repo)
446{
447 cgit_env_var env_vars[] = {
448 { .name = "CGIT_REPO_URL", .value = repo->url },
449 { .name = "CGIT_REPO_NAME", .value = repo->name },
450 { .name = "CGIT_REPO_PATH", .value = repo->path },
451 { .name = "CGIT_REPO_OWNER", .value = repo->owner },
452 { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
453 { .name = "CGIT_REPO_SECTION", .value = repo->section },
454 { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
455 };
456 int env_var_count = ARRAY_SIZE(env_vars);
457 cgit_env_var *p, *q;
458 static char *warn = "cgit warning: failed to set env: %s=%s\n";
459
460 p = env_vars;
461 q = p + env_var_count;
462 for (; p < q; p++)
463 if (p->value && setenv(p->name, p->value, 1))
464 fprintf(stderr, warn, p->name, p->value);
465}
466
467/* Read the content of the specified file into a newly allocated buffer,
468 * zeroterminate the buffer and return 0 on success, errno otherwise.
469 */
470int readfile(const char *path, char **buf, size_t *size)
471{
472 int fd, e;
473 struct stat st;
474
475 fd = open(path, O_RDONLY);
476 if (fd == -1)
477 return errno;
478 if (fstat(fd, &st)) {
479 e = errno;
480 close(fd);
481 return e;
482 }
483 if (!S_ISREG(st.st_mode)) {
484 close(fd);
485 return EISDIR;
486 }
487 *buf = xmalloc(st.st_size + 1);
488 *size = read_in_full(fd, *buf, st.st_size);
489 e = errno;
490 (*buf)[*size] = '\0';
491 close(fd);
492 return (*size == st.st_size ? 0 : e);
493}
494
495static int is_token_char(char c)
496{
497 return isalnum(c) || c == '_';
498}
499
500/* Replace name with getenv(name), return pointer to zero-terminating char
501 */
502static char *expand_macro(char *name, int maxlength)
503{
504 char *value;
505 int len;
506
507 len = 0;
508 value = getenv(name);
509 if (value) {
510 len = strlen(value);
511 if (len > maxlength)
512 len = maxlength;
513 strncpy(name, value, len);
514 }
515 return name + len;
516}
517
518#define EXPBUFSIZE (1024 * 8)
519
520/* Replace all tokens prefixed by '$' in the specified text with the
521 * value of the named environment variable.
522 * NB: the return value is a static buffer, i.e. it must be strdup'd
523 * by the caller.
524 */
525char *expand_macros(const char *txt)
526{
527 static char result[EXPBUFSIZE];
528 char *p, *start;
529 int len;
530
531 p = result;
532 start = NULL;
533 while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
534 *p = *txt;
535 if (start) {
536 if (!is_token_char(*txt)) {
537 if (p - start > 0) {
538 *p = '\0';
539 len = result + EXPBUFSIZE - start - 1;
540 p = expand_macro(start, len) - 1;
541 }
542 start = NULL;
543 txt--;
544 }
545 p++;
546 txt++;
547 continue;
548 }
549 if (*txt == '$') {
550 start = p;
551 txt++;
552 continue;
553 }
554 p++;
555 txt++;
556 }
557 *p = '\0';
558 if (start && p - start > 0) {
559 len = result + EXPBUFSIZE - start - 1;
560 p = expand_macro(start, len);
561 *p = '\0';
562 }
563 return result;
564}
565
566char *get_mimetype_for_filename(const char *filename)
567{
568 char *ext, *mimetype, *token, line[1024], *saveptr;
569 FILE *file;
570 struct string_list_item *mime;
571
572 if (!filename)
573 return NULL;
574
575 ext = strrchr(filename, '.');
576 if (!ext)
577 return NULL;
578 ++ext;
579 if (!ext[0])
580 return NULL;
581 mime = string_list_lookup(&ctx.cfg.mimetypes, ext);
582 if (mime)
583 return xstrdup(mime->util);
584
585 if (!ctx.cfg.mimetype_file)
586 return NULL;
587 file = fopen(ctx.cfg.mimetype_file, "r");
588 if (!file)
589 return NULL;
590 while (fgets(line, sizeof(line), file)) {
591 if (!line[0] || line[0] == '#')
592 continue;
593 mimetype = strtok_r(line, " \t\r\n", &saveptr);
594 while ((token = strtok_r(NULL, " \t\r\n", &saveptr))) {
595 if (!strcasecmp(ext, token)) {
596 fclose(file);
597 return xstrdup(mimetype);
598 }
599 }
600 }
601 fclose(file);
602 return NULL;
603}