shared.c (view raw)
1/* shared.c: global vars + some callback functions
2 *
3 * Copyright (C) 2006 Lars Hjemli
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("%s: %s", msg, strerror(errno));
18 return result;
19}
20
21int chk_positive(int result, char *msg)
22{
23 if (result <= 0)
24 die("%s: %s", msg, strerror(errno));
25 return result;
26}
27
28int chk_non_negative(int result, char *msg)
29{
30 if (result < 0)
31 die("%s: %s",msg, strerror(errno));
32 return result;
33}
34
35struct cgit_repo *cgit_add_repo(const char *url)
36{
37 struct cgit_repo *ret;
38
39 if (++cgit_repolist.count > cgit_repolist.length) {
40 if (cgit_repolist.length == 0)
41 cgit_repolist.length = 8;
42 else
43 cgit_repolist.length *= 2;
44 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
45 cgit_repolist.length *
46 sizeof(struct cgit_repo));
47 }
48
49 ret = &cgit_repolist.repos[cgit_repolist.count-1];
50 memset(ret, 0, sizeof(struct cgit_repo));
51 ret->url = trim_end(url, '/');
52 ret->name = ret->url;
53 ret->path = NULL;
54 ret->desc = "[no description]";
55 ret->owner = NULL;
56 ret->section = ctx.cfg.section;
57 ret->defbranch = "master";
58 ret->snapshots = ctx.cfg.snapshots;
59 ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
60 ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
61 ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
62 ret->enable_subject_links = ctx.cfg.enable_subject_links;
63 ret->max_stats = ctx.cfg.max_stats;
64 ret->module_link = ctx.cfg.module_link;
65 ret->readme = ctx.cfg.readme;
66 ret->mtime = -1;
67 ret->about_filter = ctx.cfg.about_filter;
68 ret->commit_filter = ctx.cfg.commit_filter;
69 ret->source_filter = ctx.cfg.source_filter;
70 return ret;
71}
72
73struct cgit_repo *cgit_get_repoinfo(const char *url)
74{
75 int i;
76 struct cgit_repo *repo;
77
78 for (i=0; i<cgit_repolist.count; i++) {
79 repo = &cgit_repolist.repos[i];
80 if (!strcmp(repo->url, url))
81 return repo;
82 }
83 return NULL;
84}
85
86void *cgit_free_commitinfo(struct commitinfo *info)
87{
88 free(info->author);
89 free(info->author_email);
90 free(info->committer);
91 free(info->committer_email);
92 free(info->subject);
93 free(info->msg);
94 free(info->msg_encoding);
95 free(info);
96 return NULL;
97}
98
99char *trim_end(const char *str, char c)
100{
101 int len;
102 char *s, *t;
103
104 if (str == NULL)
105 return NULL;
106 t = (char *)str;
107 len = strlen(t);
108 while(len > 0 && t[len - 1] == c)
109 len--;
110
111 if (len == 0)
112 return NULL;
113
114 c = t[len];
115 t[len] = '\0';
116 s = xstrdup(t);
117 t[len] = c;
118 return s;
119}
120
121char *strlpart(char *txt, int maxlen)
122{
123 char *result;
124
125 if (!txt)
126 return txt;
127
128 if (strlen(txt) <= maxlen)
129 return txt;
130 result = xmalloc(maxlen + 1);
131 memcpy(result, txt, maxlen - 3);
132 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
133 result[maxlen] = '\0';
134 return result;
135}
136
137char *strrpart(char *txt, int maxlen)
138{
139 char *result;
140
141 if (!txt)
142 return txt;
143
144 if (strlen(txt) <= maxlen)
145 return txt;
146 result = xmalloc(maxlen + 1);
147 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
148 result[0] = result[1] = result[2] = '.';
149 return result;
150}
151
152void cgit_add_ref(struct reflist *list, struct refinfo *ref)
153{
154 size_t size;
155
156 if (list->count >= list->alloc) {
157 list->alloc += (list->alloc ? list->alloc : 4);
158 size = list->alloc * sizeof(struct refinfo *);
159 list->refs = xrealloc(list->refs, size);
160 }
161 list->refs[list->count++] = ref;
162}
163
164struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
165{
166 struct refinfo *ref;
167
168 ref = xmalloc(sizeof (struct refinfo));
169 ref->refname = xstrdup(refname);
170 ref->object = parse_object(sha1);
171 switch (ref->object->type) {
172 case OBJ_TAG:
173 ref->tag = cgit_parse_tag((struct tag *)ref->object);
174 break;
175 case OBJ_COMMIT:
176 ref->commit = cgit_parse_commit((struct commit *)ref->object);
177 break;
178 }
179 return ref;
180}
181
182int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
183 void *cb_data)
184{
185 struct reflist *list = (struct reflist *)cb_data;
186 struct refinfo *info = cgit_mk_refinfo(refname, sha1);
187
188 if (info)
189 cgit_add_ref(list, info);
190 return 0;
191}
192
193void cgit_diff_tree_cb(struct diff_queue_struct *q,
194 struct diff_options *options, void *data)
195{
196 int i;
197
198 for (i = 0; i < q->nr; i++) {
199 if (q->queue[i]->status == 'U')
200 continue;
201 ((filepair_fn)data)(q->queue[i]);
202 }
203}
204
205static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
206{
207 enum object_type type;
208
209 if (is_null_sha1(sha1)) {
210 file->ptr = (char *)"";
211 file->size = 0;
212 } else {
213 file->ptr = read_sha1_file(sha1, &type,
214 (unsigned long *)&file->size);
215 }
216 return 1;
217}
218
219/*
220 * Receive diff-buffers from xdiff and concatenate them as
221 * needed across multiple callbacks.
222 *
223 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
224 * ripped from git and modified to use globals instead of
225 * a special callback-struct.
226 */
227char *diffbuf = NULL;
228int buflen = 0;
229
230int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
231{
232 int i;
233
234 for (i = 0; i < nbuf; i++) {
235 if (mb[i].ptr[mb[i].size-1] != '\n') {
236 /* Incomplete line */
237 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
238 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
239 buflen += mb[i].size;
240 continue;
241 }
242
243 /* we have a complete line */
244 if (!diffbuf) {
245 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
246 continue;
247 }
248 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
249 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
250 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
251 free(diffbuf);
252 diffbuf = NULL;
253 buflen = 0;
254 }
255 if (diffbuf) {
256 ((linediff_fn)priv)(diffbuf, buflen);
257 free(diffbuf);
258 diffbuf = NULL;
259 buflen = 0;
260 }
261 return 0;
262}
263
264int cgit_diff_files(const unsigned char *old_sha1,
265 const unsigned char *new_sha1, unsigned long *old_size,
266 unsigned long *new_size, int *binary, int context,
267 int ignorews, linediff_fn fn)
268{
269 mmfile_t file1, file2;
270 xpparam_t diff_params;
271 xdemitconf_t emit_params;
272 xdemitcb_t emit_cb;
273
274 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
275 return 1;
276
277 *old_size = file1.size;
278 *new_size = file2.size;
279
280 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
281 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
282 *binary = 1;
283 if (file1.size)
284 free(file1.ptr);
285 if (file2.size)
286 free(file2.ptr);
287 return 0;
288 }
289
290 memset(&diff_params, 0, sizeof(diff_params));
291 memset(&emit_params, 0, sizeof(emit_params));
292 memset(&emit_cb, 0, sizeof(emit_cb));
293 diff_params.flags = XDF_NEED_MINIMAL;
294 if (ignorews)
295 diff_params.flags |= XDF_IGNORE_WHITESPACE;
296 emit_params.ctxlen = context > 0 ? context : 3;
297 emit_params.flags = XDL_EMIT_FUNCNAMES;
298 emit_cb.outf = filediff_cb;
299 emit_cb.priv = fn;
300 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
301 if (file1.size)
302 free(file1.ptr);
303 if (file2.size)
304 free(file2.ptr);
305 return 0;
306}
307
308void cgit_diff_tree(const unsigned char *old_sha1,
309 const unsigned char *new_sha1,
310 filepair_fn fn, const char *prefix, int ignorews)
311{
312 struct diff_options opt;
313 int ret;
314 int prefixlen;
315
316 diff_setup(&opt);
317 opt.output_format = DIFF_FORMAT_CALLBACK;
318 opt.detect_rename = 1;
319 opt.rename_limit = ctx.cfg.renamelimit;
320 DIFF_OPT_SET(&opt, RECURSIVE);
321 if (ignorews)
322 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
323 opt.format_callback = cgit_diff_tree_cb;
324 opt.format_callback_data = fn;
325 if (prefix) {
326 opt.nr_paths = 1;
327 opt.paths = &prefix;
328 prefixlen = strlen(prefix);
329 opt.pathlens = &prefixlen;
330 }
331 diff_setup_done(&opt);
332
333 if (old_sha1 && !is_null_sha1(old_sha1))
334 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
335 else
336 ret = diff_root_tree_sha1(new_sha1, "", &opt);
337 diffcore_std(&opt);
338 diff_flush(&opt);
339}
340
341void cgit_diff_commit(struct commit *commit, filepair_fn fn)
342{
343 unsigned char *old_sha1 = NULL;
344
345 if (commit->parents)
346 old_sha1 = commit->parents->item->object.sha1;
347 cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL,
348 ctx.qry.ignorews);
349}
350
351int cgit_parse_snapshots_mask(const char *str)
352{
353 const struct cgit_snapshot_format *f;
354 static const char *delim = " \t,:/|;";
355 int tl, sl, rv = 0;
356
357 /* favor legacy setting */
358 if(atoi(str))
359 return 1;
360 for(;;) {
361 str += strspn(str,delim);
362 tl = strcspn(str,delim);
363 if (!tl)
364 break;
365 for (f = cgit_snapshot_formats; f->suffix; f++) {
366 sl = strlen(f->suffix);
367 if((tl == sl && !strncmp(f->suffix, str, tl)) ||
368 (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
369 rv |= f->bit;
370 break;
371 }
372 }
373 str += tl;
374 }
375 return rv;
376}
377
378int cgit_open_filter(struct cgit_filter *filter)
379{
380
381 filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
382 "Unable to duplicate STDOUT");
383 chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
384 filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
385 if (filter->pid == 0) {
386 close(filter->pipe_fh[1]);
387 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
388 "Unable to use pipe as STDIN");
389 execvp(filter->cmd, filter->argv);
390 die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
391 strerror(errno), errno);
392 }
393 close(filter->pipe_fh[0]);
394 chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
395 "Unable to use pipe as STDOUT");
396 close(filter->pipe_fh[1]);
397 return 0;
398}
399
400int cgit_close_filter(struct cgit_filter *filter)
401{
402 chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
403 "Unable to restore STDOUT");
404 close(filter->old_stdout);
405 if (filter->pid < 0)
406 return 0;
407 waitpid(filter->pid, &filter->exitstatus, 0);
408 if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
409 return 0;
410 die("Subprocess %s exited abnormally", filter->cmd);
411}
412
413/* Read the content of the specified file into a newly allocated buffer,
414 * zeroterminate the buffer and return 0 on success, errno otherwise.
415 */
416int readfile(const char *path, char **buf, size_t *size)
417{
418 int fd, e;
419 struct stat st;
420
421 fd = open(path, O_RDONLY);
422 if (fd == -1)
423 return errno;
424 if (fstat(fd, &st)) {
425 e = errno;
426 close(fd);
427 return e;
428 }
429 if (!S_ISREG(st.st_mode)) {
430 close(fd);
431 return EISDIR;
432 }
433 *buf = xmalloc(st.st_size + 1);
434 *size = read_in_full(fd, *buf, st.st_size);
435 e = errno;
436 (*buf)[*size] = '\0';
437 close(fd);
438 return (*size == st.st_size ? 0 : e);
439}
440
441int is_token_char(char c)
442{
443 return isalnum(c) || c == '_';
444}
445
446/* Replace name with getenv(name), return pointer to zero-terminating char
447 */
448char *expand_macro(char *name, int maxlength)
449{
450 char *value;
451 int len;
452
453 len = 0;
454 value = getenv(name);
455 if (value) {
456 len = strlen(value);
457 if (len > maxlength)
458 len = maxlength;
459 strncpy(name, value, len);
460 }
461 return name + len;
462}
463
464#define EXPBUFSIZE (1024 * 8)
465
466/* Replace all tokens prefixed by '$' in the specified text with the
467 * value of the named environment variable.
468 * NB: the return value is a static buffer, i.e. it must be strdup'd
469 * by the caller.
470 */
471char *expand_macros(const char *txt)
472{
473 static char result[EXPBUFSIZE];
474 char *p, *start;
475 int len;
476
477 p = result;
478 start = NULL;
479 while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
480 *p = *txt;
481 if (start) {
482 if (!is_token_char(*txt)) {
483 if (p - start > 0) {
484 *p = '\0';
485 len = result + EXPBUFSIZE - start - 1;
486 p = expand_macro(start, len) - 1;
487 }
488 start = NULL;
489 txt--;
490 }
491 p++;
492 txt++;
493 continue;
494 }
495 if (*txt == '$') {
496 start = p;
497 txt++;
498 continue;
499 }
500 p++;
501 txt++;
502 }
503 *p = '\0';
504 if (start && p - start > 0) {
505 len = result + EXPBUFSIZE - start - 1;
506 p = expand_macro(start, len);
507 *p = '\0';
508 }
509 return result;
510}