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;
13int cgit_cmd;
14
15int chk_zero(int result, char *msg)
16{
17 if (result != 0)
18 die("%s: %s", msg, strerror(errno));
19 return result;
20}
21
22int chk_positive(int result, char *msg)
23{
24 if (result <= 0)
25 die("%s: %s", msg, strerror(errno));
26 return result;
27}
28
29int chk_non_negative(int result, char *msg)
30{
31 if (result < 0)
32 die("%s: %s",msg, strerror(errno));
33 return result;
34}
35
36struct cgit_repo *cgit_add_repo(const char *url)
37{
38 struct cgit_repo *ret;
39
40 if (++cgit_repolist.count > cgit_repolist.length) {
41 if (cgit_repolist.length == 0)
42 cgit_repolist.length = 8;
43 else
44 cgit_repolist.length *= 2;
45 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
46 cgit_repolist.length *
47 sizeof(struct cgit_repo));
48 }
49
50 ret = &cgit_repolist.repos[cgit_repolist.count-1];
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->group = ctx.cfg.repo_group;
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->max_stats = ctx.cfg.max_stats;
62 ret->module_link = ctx.cfg.module_link;
63 ret->readme = NULL;
64 ret->mtime = -1;
65 ret->about_filter = ctx.cfg.about_filter;
66 ret->commit_filter = ctx.cfg.commit_filter;
67 ret->source_filter = ctx.cfg.source_filter;
68 return ret;
69}
70
71struct cgit_repo *cgit_get_repoinfo(const char *url)
72{
73 int i;
74 struct cgit_repo *repo;
75
76 for (i=0; i<cgit_repolist.count; i++) {
77 repo = &cgit_repolist.repos[i];
78 if (!strcmp(repo->url, url))
79 return repo;
80 }
81 return NULL;
82}
83
84void *cgit_free_commitinfo(struct commitinfo *info)
85{
86 free(info->author);
87 free(info->author_email);
88 free(info->committer);
89 free(info->committer_email);
90 free(info->subject);
91 free(info->msg);
92 free(info->msg_encoding);
93 free(info);
94 return NULL;
95}
96
97char *trim_end(const char *str, char c)
98{
99 int len;
100 char *s, *t;
101
102 if (str == NULL)
103 return NULL;
104 t = (char *)str;
105 len = strlen(t);
106 while(len > 0 && t[len - 1] == c)
107 len--;
108
109 if (len == 0)
110 return NULL;
111
112 c = t[len];
113 t[len] = '\0';
114 s = xstrdup(t);
115 t[len] = c;
116 return s;
117}
118
119char *strlpart(char *txt, int maxlen)
120{
121 char *result;
122
123 if (!txt)
124 return txt;
125
126 if (strlen(txt) <= maxlen)
127 return txt;
128 result = xmalloc(maxlen + 1);
129 memcpy(result, txt, maxlen - 3);
130 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
131 result[maxlen] = '\0';
132 return result;
133}
134
135char *strrpart(char *txt, int maxlen)
136{
137 char *result;
138
139 if (!txt)
140 return txt;
141
142 if (strlen(txt) <= maxlen)
143 return txt;
144 result = xmalloc(maxlen + 1);
145 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
146 result[0] = result[1] = result[2] = '.';
147 return result;
148}
149
150void cgit_add_ref(struct reflist *list, struct refinfo *ref)
151{
152 size_t size;
153
154 if (list->count >= list->alloc) {
155 list->alloc += (list->alloc ? list->alloc : 4);
156 size = list->alloc * sizeof(struct refinfo *);
157 list->refs = xrealloc(list->refs, size);
158 }
159 list->refs[list->count++] = ref;
160}
161
162struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
163{
164 struct refinfo *ref;
165
166 ref = xmalloc(sizeof (struct refinfo));
167 ref->refname = xstrdup(refname);
168 ref->object = parse_object(sha1);
169 switch (ref->object->type) {
170 case OBJ_TAG:
171 ref->tag = cgit_parse_tag((struct tag *)ref->object);
172 break;
173 case OBJ_COMMIT:
174 ref->commit = cgit_parse_commit((struct commit *)ref->object);
175 break;
176 }
177 return ref;
178}
179
180int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
181 void *cb_data)
182{
183 struct reflist *list = (struct reflist *)cb_data;
184 struct refinfo *info = cgit_mk_refinfo(refname, sha1);
185
186 if (info)
187 cgit_add_ref(list, info);
188 return 0;
189}
190
191void cgit_diff_tree_cb(struct diff_queue_struct *q,
192 struct diff_options *options, void *data)
193{
194 int i;
195
196 for (i = 0; i < q->nr; i++) {
197 if (q->queue[i]->status == 'U')
198 continue;
199 ((filepair_fn)data)(q->queue[i]);
200 }
201}
202
203static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
204{
205 enum object_type type;
206
207 if (is_null_sha1(sha1)) {
208 file->ptr = (char *)"";
209 file->size = 0;
210 } else {
211 file->ptr = read_sha1_file(sha1, &type,
212 (unsigned long *)&file->size);
213 }
214 return 1;
215}
216
217/*
218 * Receive diff-buffers from xdiff and concatenate them as
219 * needed across multiple callbacks.
220 *
221 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
222 * ripped from git and modified to use globals instead of
223 * a special callback-struct.
224 */
225char *diffbuf = NULL;
226int buflen = 0;
227
228int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
229{
230 int i;
231
232 for (i = 0; i < nbuf; i++) {
233 if (mb[i].ptr[mb[i].size-1] != '\n') {
234 /* Incomplete line */
235 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
236 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
237 buflen += mb[i].size;
238 continue;
239 }
240
241 /* we have a complete line */
242 if (!diffbuf) {
243 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
244 continue;
245 }
246 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
247 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
248 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
249 free(diffbuf);
250 diffbuf = NULL;
251 buflen = 0;
252 }
253 if (diffbuf) {
254 ((linediff_fn)priv)(diffbuf, buflen);
255 free(diffbuf);
256 diffbuf = NULL;
257 buflen = 0;
258 }
259 return 0;
260}
261
262int cgit_diff_files(const unsigned char *old_sha1,
263 const unsigned char *new_sha1, unsigned long *old_size,
264 unsigned long *new_size, int *binary, linediff_fn fn)
265{
266 mmfile_t file1, file2;
267 xpparam_t diff_params;
268 xdemitconf_t emit_params;
269 xdemitcb_t emit_cb;
270
271 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
272 return 1;
273
274 *old_size = file1.size;
275 *new_size = file2.size;
276
277 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
278 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
279 *binary = 1;
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 emit_params.ctxlen = 3;
288 emit_params.flags = XDL_EMIT_FUNCNAMES;
289 emit_cb.outf = filediff_cb;
290 emit_cb.priv = fn;
291 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
292 return 0;
293}
294
295void cgit_diff_tree(const unsigned char *old_sha1,
296 const unsigned char *new_sha1,
297 filepair_fn fn, const char *prefix)
298{
299 struct diff_options opt;
300 int ret;
301 int prefixlen;
302
303 diff_setup(&opt);
304 opt.output_format = DIFF_FORMAT_CALLBACK;
305 opt.detect_rename = 1;
306 opt.rename_limit = ctx.cfg.renamelimit;
307 DIFF_OPT_SET(&opt, RECURSIVE);
308 opt.format_callback = cgit_diff_tree_cb;
309 opt.format_callback_data = fn;
310 if (prefix) {
311 opt.nr_paths = 1;
312 opt.paths = &prefix;
313 prefixlen = strlen(prefix);
314 opt.pathlens = &prefixlen;
315 }
316 diff_setup_done(&opt);
317
318 if (old_sha1 && !is_null_sha1(old_sha1))
319 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
320 else
321 ret = diff_root_tree_sha1(new_sha1, "", &opt);
322 diffcore_std(&opt);
323 diff_flush(&opt);
324}
325
326void cgit_diff_commit(struct commit *commit, filepair_fn fn)
327{
328 unsigned char *old_sha1 = NULL;
329
330 if (commit->parents)
331 old_sha1 = commit->parents->item->object.sha1;
332 cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
333}
334
335int cgit_parse_snapshots_mask(const char *str)
336{
337 const struct cgit_snapshot_format *f;
338 static const char *delim = " \t,:/|;";
339 int tl, sl, rv = 0;
340
341 /* favor legacy setting */
342 if(atoi(str))
343 return 1;
344 for(;;) {
345 str += strspn(str,delim);
346 tl = strcspn(str,delim);
347 if (!tl)
348 break;
349 for (f = cgit_snapshot_formats; f->suffix; f++) {
350 sl = strlen(f->suffix);
351 if((tl == sl && !strncmp(f->suffix, str, tl)) ||
352 (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
353 rv |= f->bit;
354 break;
355 }
356 }
357 str += tl;
358 }
359 return rv;
360}
361
362int cgit_open_filter(struct cgit_filter *filter)
363{
364
365 filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
366 "Unable to duplicate STDOUT");
367 chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
368 filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
369 if (filter->pid == 0) {
370 close(filter->pipe_fh[1]);
371 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
372 "Unable to use pipe as STDIN");
373 execvp(filter->cmd, filter->argv);
374 die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
375 strerror(errno), errno);
376 }
377 close(filter->pipe_fh[0]);
378 chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
379 "Unable to use pipe as STDOUT");
380 close(filter->pipe_fh[1]);
381 return 0;
382}
383
384int cgit_close_filter(struct cgit_filter *filter)
385{
386 chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
387 "Unable to restore STDOUT");
388 close(filter->old_stdout);
389 if (filter->pid < 0)
390 return 0;
391 waitpid(filter->pid, &filter->exitstatus, 0);
392 if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
393 return 0;
394 die("Subprocess %s exited abnormally", filter->cmd);
395}
396
397/* Read the content of the specified file into a newly allocated buffer,
398 * zeroterminate the buffer and return 0 on success, errno otherwise.
399 */
400int readfile(const char *path, char **buf, size_t *size)
401{
402 int fd;
403 struct stat st;
404
405 fd = open(path, O_RDONLY);
406 if (fd == -1)
407 return errno;
408 if (fstat(fd, &st))
409 return errno;
410 if (!S_ISREG(st.st_mode))
411 return EISDIR;
412 *buf = xmalloc(st.st_size + 1);
413 *size = read_in_full(fd, *buf, st.st_size);
414 (*buf)[*size] = '\0';
415 return (*size == st.st_size ? 0 : errno);
416}