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->commit_filter = ctx.cfg.commit_filter;
66 ret->source_filter = ctx.cfg.source_filter;
67 return ret;
68}
69
70struct cgit_repo *cgit_get_repoinfo(const char *url)
71{
72 int i;
73 struct cgit_repo *repo;
74
75 for (i=0; i<cgit_repolist.count; i++) {
76 repo = &cgit_repolist.repos[i];
77 if (!strcmp(repo->url, url))
78 return repo;
79 }
80 return NULL;
81}
82
83void *cgit_free_commitinfo(struct commitinfo *info)
84{
85 free(info->author);
86 free(info->author_email);
87 free(info->committer);
88 free(info->committer_email);
89 free(info->subject);
90 free(info->msg);
91 free(info->msg_encoding);
92 free(info);
93 return NULL;
94}
95
96char *trim_end(const char *str, char c)
97{
98 int len;
99 char *s, *t;
100
101 if (str == NULL)
102 return NULL;
103 t = (char *)str;
104 len = strlen(t);
105 while(len > 0 && t[len - 1] == c)
106 len--;
107
108 if (len == 0)
109 return NULL;
110
111 c = t[len];
112 t[len] = '\0';
113 s = xstrdup(t);
114 t[len] = c;
115 return s;
116}
117
118char *strlpart(char *txt, int maxlen)
119{
120 char *result;
121
122 if (!txt)
123 return txt;
124
125 if (strlen(txt) <= maxlen)
126 return txt;
127 result = xmalloc(maxlen + 1);
128 memcpy(result, txt, maxlen - 3);
129 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
130 result[maxlen] = '\0';
131 return result;
132}
133
134char *strrpart(char *txt, int maxlen)
135{
136 char *result;
137
138 if (!txt)
139 return txt;
140
141 if (strlen(txt) <= maxlen)
142 return txt;
143 result = xmalloc(maxlen + 1);
144 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
145 result[0] = result[1] = result[2] = '.';
146 return result;
147}
148
149void cgit_add_ref(struct reflist *list, struct refinfo *ref)
150{
151 size_t size;
152
153 if (list->count >= list->alloc) {
154 list->alloc += (list->alloc ? list->alloc : 4);
155 size = list->alloc * sizeof(struct refinfo *);
156 list->refs = xrealloc(list->refs, size);
157 }
158 list->refs[list->count++] = ref;
159}
160
161struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
162{
163 struct refinfo *ref;
164
165 ref = xmalloc(sizeof (struct refinfo));
166 ref->refname = xstrdup(refname);
167 ref->object = parse_object(sha1);
168 switch (ref->object->type) {
169 case OBJ_TAG:
170 ref->tag = cgit_parse_tag((struct tag *)ref->object);
171 break;
172 case OBJ_COMMIT:
173 ref->commit = cgit_parse_commit((struct commit *)ref->object);
174 break;
175 }
176 return ref;
177}
178
179int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
180 void *cb_data)
181{
182 struct reflist *list = (struct reflist *)cb_data;
183 struct refinfo *info = cgit_mk_refinfo(refname, sha1);
184
185 if (info)
186 cgit_add_ref(list, info);
187 return 0;
188}
189
190void cgit_diff_tree_cb(struct diff_queue_struct *q,
191 struct diff_options *options, void *data)
192{
193 int i;
194
195 for (i = 0; i < q->nr; i++) {
196 if (q->queue[i]->status == 'U')
197 continue;
198 ((filepair_fn)data)(q->queue[i]);
199 }
200}
201
202static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
203{
204 enum object_type type;
205
206 if (is_null_sha1(sha1)) {
207 file->ptr = (char *)"";
208 file->size = 0;
209 } else {
210 file->ptr = read_sha1_file(sha1, &type,
211 (unsigned long *)&file->size);
212 }
213 return 1;
214}
215
216/*
217 * Receive diff-buffers from xdiff and concatenate them as
218 * needed across multiple callbacks.
219 *
220 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
221 * ripped from git and modified to use globals instead of
222 * a special callback-struct.
223 */
224char *diffbuf = NULL;
225int buflen = 0;
226
227int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
228{
229 int i;
230
231 for (i = 0; i < nbuf; i++) {
232 if (mb[i].ptr[mb[i].size-1] != '\n') {
233 /* Incomplete line */
234 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
235 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
236 buflen += mb[i].size;
237 continue;
238 }
239
240 /* we have a complete line */
241 if (!diffbuf) {
242 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
243 continue;
244 }
245 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
246 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
247 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
248 free(diffbuf);
249 diffbuf = NULL;
250 buflen = 0;
251 }
252 if (diffbuf) {
253 ((linediff_fn)priv)(diffbuf, buflen);
254 free(diffbuf);
255 diffbuf = NULL;
256 buflen = 0;
257 }
258 return 0;
259}
260
261int cgit_diff_files(const unsigned char *old_sha1,
262 const unsigned char *new_sha1, unsigned long *old_size,
263 unsigned long *new_size, int *binary, linediff_fn fn)
264{
265 mmfile_t file1, file2;
266 xpparam_t diff_params;
267 xdemitconf_t emit_params;
268 xdemitcb_t emit_cb;
269
270 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
271 return 1;
272
273 *old_size = file1.size;
274 *new_size = file2.size;
275
276 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
277 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
278 *binary = 1;
279 return 0;
280 }
281
282 memset(&diff_params, 0, sizeof(diff_params));
283 memset(&emit_params, 0, sizeof(emit_params));
284 memset(&emit_cb, 0, sizeof(emit_cb));
285 diff_params.flags = XDF_NEED_MINIMAL;
286 emit_params.ctxlen = 3;
287 emit_params.flags = XDL_EMIT_FUNCNAMES;
288 emit_cb.outf = filediff_cb;
289 emit_cb.priv = fn;
290 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
291 return 0;
292}
293
294void cgit_diff_tree(const unsigned char *old_sha1,
295 const unsigned char *new_sha1,
296 filepair_fn fn, const char *prefix)
297{
298 struct diff_options opt;
299 int ret;
300 int prefixlen;
301
302 diff_setup(&opt);
303 opt.output_format = DIFF_FORMAT_CALLBACK;
304 opt.detect_rename = 1;
305 opt.rename_limit = ctx.cfg.renamelimit;
306 DIFF_OPT_SET(&opt, RECURSIVE);
307 opt.format_callback = cgit_diff_tree_cb;
308 opt.format_callback_data = fn;
309 if (prefix) {
310 opt.nr_paths = 1;
311 opt.paths = &prefix;
312 prefixlen = strlen(prefix);
313 opt.pathlens = &prefixlen;
314 }
315 diff_setup_done(&opt);
316
317 if (old_sha1 && !is_null_sha1(old_sha1))
318 ret = diff_tree_sha1(old_sha1, new_sha1, "", &opt);
319 else
320 ret = diff_root_tree_sha1(new_sha1, "", &opt);
321 diffcore_std(&opt);
322 diff_flush(&opt);
323}
324
325void cgit_diff_commit(struct commit *commit, filepair_fn fn)
326{
327 unsigned char *old_sha1 = NULL;
328
329 if (commit->parents)
330 old_sha1 = commit->parents->item->object.sha1;
331 cgit_diff_tree(old_sha1, commit->object.sha1, fn, NULL);
332}
333
334int cgit_parse_snapshots_mask(const char *str)
335{
336 const struct cgit_snapshot_format *f;
337 static const char *delim = " \t,:/|;";
338 int tl, sl, rv = 0;
339
340 /* favor legacy setting */
341 if(atoi(str))
342 return 1;
343 for(;;) {
344 str += strspn(str,delim);
345 tl = strcspn(str,delim);
346 if (!tl)
347 break;
348 for (f = cgit_snapshot_formats; f->suffix; f++) {
349 sl = strlen(f->suffix);
350 if((tl == sl && !strncmp(f->suffix, str, tl)) ||
351 (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
352 rv |= f->bit;
353 break;
354 }
355 }
356 str += tl;
357 }
358 return rv;
359}
360
361int cgit_open_filter(struct cgit_filter *filter)
362{
363
364 filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
365 "Unable to duplicate STDOUT");
366 chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
367 filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
368 if (filter->pid == 0) {
369 close(filter->pipe_fh[1]);
370 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
371 "Unable to use pipe as STDIN");
372 execvp(filter->cmd, filter->argv);
373 die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
374 strerror(errno), errno);
375 }
376 close(filter->pipe_fh[0]);
377 chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
378 "Unable to use pipe as STDOUT");
379 close(filter->pipe_fh[1]);
380 return 0;
381}
382
383int cgit_close_filter(struct cgit_filter *filter)
384{
385 chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
386 "Unable to restore STDOUT");
387 close(filter->old_stdout);
388 if (filter->pid < 0)
389 return 0;
390 waitpid(filter->pid, &filter->exitstatus, 0);
391 if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
392 return 0;
393 die("Subprocess %s exited abnormally", filter->cmd);
394}