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_commit_graph = ctx.cfg.enable_commit_graph;
60 ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
61 ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
62 ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
63 ret->enable_subject_links = ctx.cfg.enable_subject_links;
64 ret->max_stats = ctx.cfg.max_stats;
65 ret->module_link = ctx.cfg.module_link;
66 ret->readme = ctx.cfg.readme;
67 ret->mtime = -1;
68 ret->about_filter = ctx.cfg.about_filter;
69 ret->commit_filter = ctx.cfg.commit_filter;
70 ret->source_filter = ctx.cfg.source_filter;
71 return ret;
72}
73
74struct cgit_repo *cgit_get_repoinfo(const char *url)
75{
76 int i;
77 struct cgit_repo *repo;
78
79 for (i=0; i<cgit_repolist.count; i++) {
80 repo = &cgit_repolist.repos[i];
81 if (!strcmp(repo->url, url))
82 return repo;
83 }
84 return NULL;
85}
86
87void *cgit_free_commitinfo(struct commitinfo *info)
88{
89 free(info->author);
90 free(info->author_email);
91 free(info->committer);
92 free(info->committer_email);
93 free(info->subject);
94 free(info->msg);
95 free(info->msg_encoding);
96 free(info);
97 return NULL;
98}
99
100char *trim_end(const char *str, char c)
101{
102 int len;
103 char *s, *t;
104
105 if (str == NULL)
106 return NULL;
107 t = (char *)str;
108 len = strlen(t);
109 while(len > 0 && t[len - 1] == c)
110 len--;
111
112 if (len == 0)
113 return NULL;
114
115 c = t[len];
116 t[len] = '\0';
117 s = xstrdup(t);
118 t[len] = c;
119 return s;
120}
121
122char *strlpart(char *txt, int maxlen)
123{
124 char *result;
125
126 if (!txt)
127 return txt;
128
129 if (strlen(txt) <= maxlen)
130 return txt;
131 result = xmalloc(maxlen + 1);
132 memcpy(result, txt, maxlen - 3);
133 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
134 result[maxlen] = '\0';
135 return result;
136}
137
138char *strrpart(char *txt, int maxlen)
139{
140 char *result;
141
142 if (!txt)
143 return txt;
144
145 if (strlen(txt) <= maxlen)
146 return txt;
147 result = xmalloc(maxlen + 1);
148 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
149 result[0] = result[1] = result[2] = '.';
150 return result;
151}
152
153void cgit_add_ref(struct reflist *list, struct refinfo *ref)
154{
155 size_t size;
156
157 if (list->count >= list->alloc) {
158 list->alloc += (list->alloc ? list->alloc : 4);
159 size = list->alloc * sizeof(struct refinfo *);
160 list->refs = xrealloc(list->refs, size);
161 }
162 list->refs[list->count++] = ref;
163}
164
165struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
166{
167 struct refinfo *ref;
168
169 ref = xmalloc(sizeof (struct refinfo));
170 ref->refname = xstrdup(refname);
171 ref->object = parse_object(sha1);
172 switch (ref->object->type) {
173 case OBJ_TAG:
174 ref->tag = cgit_parse_tag((struct tag *)ref->object);
175 break;
176 case OBJ_COMMIT:
177 ref->commit = cgit_parse_commit((struct commit *)ref->object);
178 break;
179 }
180 return ref;
181}
182
183int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
184 void *cb_data)
185{
186 struct reflist *list = (struct reflist *)cb_data;
187 struct refinfo *info = cgit_mk_refinfo(refname, sha1);
188
189 if (info)
190 cgit_add_ref(list, info);
191 return 0;
192}
193
194void cgit_diff_tree_cb(struct diff_queue_struct *q,
195 struct diff_options *options, void *data)
196{
197 int i;
198
199 for (i = 0; i < q->nr; i++) {
200 if (q->queue[i]->status == 'U')
201 continue;
202 ((filepair_fn)data)(q->queue[i]);
203 }
204}
205
206static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
207{
208 enum object_type type;
209
210 if (is_null_sha1(sha1)) {
211 file->ptr = (char *)"";
212 file->size = 0;
213 } else {
214 file->ptr = read_sha1_file(sha1, &type,
215 (unsigned long *)&file->size);
216 }
217 return 1;
218}
219
220/*
221 * Receive diff-buffers from xdiff and concatenate them as
222 * needed across multiple callbacks.
223 *
224 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
225 * ripped from git and modified to use globals instead of
226 * a special callback-struct.
227 */
228char *diffbuf = NULL;
229int buflen = 0;
230
231int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
232{
233 int i;
234
235 for (i = 0; i < nbuf; i++) {
236 if (mb[i].ptr[mb[i].size-1] != '\n') {
237 /* Incomplete line */
238 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
239 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
240 buflen += mb[i].size;
241 continue;
242 }
243
244 /* we have a complete line */
245 if (!diffbuf) {
246 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
247 continue;
248 }
249 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
250 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
251 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
252 free(diffbuf);
253 diffbuf = NULL;
254 buflen = 0;
255 }
256 if (diffbuf) {
257 ((linediff_fn)priv)(diffbuf, buflen);
258 free(diffbuf);
259 diffbuf = NULL;
260 buflen = 0;
261 }
262 return 0;
263}
264
265int cgit_diff_files(const unsigned char *old_sha1,
266 const unsigned char *new_sha1, unsigned long *old_size,
267 unsigned long *new_size, int *binary, int context,
268 int ignorews, linediff_fn fn)
269{
270 mmfile_t file1, file2;
271 xpparam_t diff_params;
272 xdemitconf_t emit_params;
273 xdemitcb_t emit_cb;
274
275 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
276 return 1;
277
278 *old_size = file1.size;
279 *new_size = file2.size;
280
281 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
282 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
283 *binary = 1;
284 if (file1.size)
285 free(file1.ptr);
286 if (file2.size)
287 free(file2.ptr);
288 return 0;
289 }
290
291 memset(&diff_params, 0, sizeof(diff_params));
292 memset(&emit_params, 0, sizeof(emit_params));
293 memset(&emit_cb, 0, sizeof(emit_cb));
294 diff_params.flags = XDF_NEED_MINIMAL;
295 if (ignorews)
296 diff_params.flags |= XDF_IGNORE_WHITESPACE;
297 emit_params.ctxlen = context > 0 ? context : 3;
298 emit_params.flags = XDL_EMIT_FUNCNAMES;
299 emit_cb.outf = filediff_cb;
300 emit_cb.priv = fn;
301 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
302 if (file1.size)
303 free(file1.ptr);
304 if (file2.size)
305 free(file2.ptr);
306 return 0;
307}
308
309void cgit_diff_tree(const unsigned char *old_sha1,
310 const unsigned char *new_sha1,
311 filepair_fn fn, const char *prefix, int ignorews)
312{
313 struct diff_options opt;
314 int ret;
315 int prefixlen;
316
317 diff_setup(&opt);
318 opt.output_format = DIFF_FORMAT_CALLBACK;
319 opt.detect_rename = 1;
320 opt.rename_limit = ctx.cfg.renamelimit;
321 DIFF_OPT_SET(&opt, RECURSIVE);
322 if (ignorews)
323 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
324 opt.format_callback = cgit_diff_tree_cb;
325 opt.format_callback_data = fn;
326 if (prefix) {
327 opt.nr_paths = 1;
328 opt.paths = &prefix;
329 prefixlen = strlen(prefix);
330 opt.pathlens = &prefixlen;
331 }
332 diff_setup_done(&opt);
333
334 if (old_sha1 && !is_null_sha1(old_sha1))
335 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
336 else
337 ret = diff_root_tree_sha1(new_sha1, "", &opt);
338 diffcore_std(&opt);
339 diff_flush(&opt);
340}
341
342void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
343{
344 unsigned char *old_sha1 = NULL;
345
346 if (commit->parents)
347 old_sha1 = commit->parents->item->object.sha1;
348 cgit_diff_tree(old_sha1, commit->object.sha1, fn, prefix,
349 ctx.qry.ignorews);
350}
351
352int cgit_parse_snapshots_mask(const char *str)
353{
354 const struct cgit_snapshot_format *f;
355 static const char *delim = " \t,:/|;";
356 int tl, sl, rv = 0;
357
358 /* favor legacy setting */
359 if(atoi(str))
360 return 1;
361 for(;;) {
362 str += strspn(str,delim);
363 tl = strcspn(str,delim);
364 if (!tl)
365 break;
366 for (f = cgit_snapshot_formats; f->suffix; f++) {
367 sl = strlen(f->suffix);
368 if((tl == sl && !strncmp(f->suffix, str, tl)) ||
369 (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
370 rv |= f->bit;
371 break;
372 }
373 }
374 str += tl;
375 }
376 return rv;
377}
378
379int cgit_open_filter(struct cgit_filter *filter)
380{
381
382 filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
383 "Unable to duplicate STDOUT");
384 chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
385 filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
386 if (filter->pid == 0) {
387 close(filter->pipe_fh[1]);
388 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
389 "Unable to use pipe as STDIN");
390 execvp(filter->cmd, filter->argv);
391 die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
392 strerror(errno), errno);
393 }
394 close(filter->pipe_fh[0]);
395 chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
396 "Unable to use pipe as STDOUT");
397 close(filter->pipe_fh[1]);
398 return 0;
399}
400
401int cgit_close_filter(struct cgit_filter *filter)
402{
403 chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
404 "Unable to restore STDOUT");
405 close(filter->old_stdout);
406 if (filter->pid < 0)
407 return 0;
408 waitpid(filter->pid, &filter->exitstatus, 0);
409 if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
410 return 0;
411 die("Subprocess %s exited abnormally", filter->cmd);
412}
413
414/* Read the content of the specified file into a newly allocated buffer,
415 * zeroterminate the buffer and return 0 on success, errno otherwise.
416 */
417int readfile(const char *path, char **buf, size_t *size)
418{
419 int fd, e;
420 struct stat st;
421
422 fd = open(path, O_RDONLY);
423 if (fd == -1)
424 return errno;
425 if (fstat(fd, &st)) {
426 e = errno;
427 close(fd);
428 return e;
429 }
430 if (!S_ISREG(st.st_mode)) {
431 close(fd);
432 return EISDIR;
433 }
434 *buf = xmalloc(st.st_size + 1);
435 *size = read_in_full(fd, *buf, st.st_size);
436 e = errno;
437 (*buf)[*size] = '\0';
438 close(fd);
439 return (*size == st.st_size ? 0 : e);
440}
441
442int is_token_char(char c)
443{
444 return isalnum(c) || c == '_';
445}
446
447/* Replace name with getenv(name), return pointer to zero-terminating char
448 */
449char *expand_macro(char *name, int maxlength)
450{
451 char *value;
452 int len;
453
454 len = 0;
455 value = getenv(name);
456 if (value) {
457 len = strlen(value);
458 if (len > maxlength)
459 len = maxlength;
460 strncpy(name, value, len);
461 }
462 return name + len;
463}
464
465#define EXPBUFSIZE (1024 * 8)
466
467/* Replace all tokens prefixed by '$' in the specified text with the
468 * value of the named environment variable.
469 * NB: the return value is a static buffer, i.e. it must be strdup'd
470 * by the caller.
471 */
472char *expand_macros(const char *txt)
473{
474 static char result[EXPBUFSIZE];
475 char *p, *start;
476 int len;
477
478 p = result;
479 start = NULL;
480 while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
481 *p = *txt;
482 if (start) {
483 if (!is_token_char(*txt)) {
484 if (p - start > 0) {
485 *p = '\0';
486 len = result + EXPBUFSIZE - start - 1;
487 p = expand_macro(start, len) - 1;
488 }
489 start = NULL;
490 txt--;
491 }
492 p++;
493 txt++;
494 continue;
495 }
496 if (*txt == '$') {
497 start = p;
498 txt++;
499 continue;
500 }
501 p++;
502 txt++;
503 }
504 *p = '\0';
505 if (start && p - start > 0) {
506 len = result + EXPBUFSIZE - start - 1;
507 p = expand_macro(start, len);
508 *p = '\0';
509 }
510 return result;
511}