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