]> gitweb.ps.run Git - ps-cgit/blob - shared.c
cgit_open_filter: also take the repo as a parameter
[ps-cgit] / shared.c
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
11 struct cgit_repolist cgit_repolist;
12 struct cgit_context ctx;
13
14 int chk_zero(int result, char *msg)
15 {
16         if (result != 0)
17                 die("%s: %s", msg, strerror(errno));
18         return result;
19 }
20
21 int chk_positive(int result, char *msg)
22 {
23         if (result <= 0)
24                 die("%s: %s", msg, strerror(errno));
25         return result;
26 }
27
28 int chk_non_negative(int result, char *msg)
29 {
30         if (result < 0)
31                 die("%s: %s",msg, strerror(errno));
32         return result;
33 }
34
35 struct 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
74 struct 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
87 void *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
100 char *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
122 char *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
138 char *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
153 void 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
165 struct 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
183 int 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
194 void 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
206 static 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  */
228 char *diffbuf = NULL;
229 int buflen = 0;
230
231 int 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
265 int 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
309 void 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
342 void 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
352 int 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
379 int cgit_open_filter(struct cgit_filter *filter, struct cgit_repo * repo)
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
401 int 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  */
417 int 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
442 int 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  */
449 char *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 '$' in the specified text with the
468  * value of the named environment variable.
469  * NB: the return value is a static buffer, i.e. it must be strdup'd
470  * by the caller.
471  */
472 char *expand_macros(const char *txt)
473 {
474         static char result[EXPBUFSIZE];
475         char *p, *start;
476         int len;
477
478         p = result;
479         start = NULL;
480         while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
481                 *p = *txt;
482                 if (start) {
483                         if (!is_token_char(*txt)) {
484                                 if (p - start > 0) {
485                                         *p = '\0';
486                                         len = result + EXPBUFSIZE - start - 1;
487                                         p = expand_macro(start, len) - 1;
488                                 }
489                                 start = NULL;
490                                 txt--;
491                         }
492                         p++;
493                         txt++;
494                         continue;
495                 }
496                 if (*txt == '$') {
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 }