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