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