]> gitweb.ps.run Git - ps-cgit/blob - shared.c
Remove unused variable from cgit_diff_tree().
[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
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
114 char *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
130 char *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
145 void 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
157 struct 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
175 int 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
186 void 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
198 static 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  */
220 char *diffbuf = NULL;
221 int buflen = 0;
222
223 int 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
257 int 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
301 void 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 prefixlen;
307
308         diff_setup(&opt);
309         opt.output_format = DIFF_FORMAT_CALLBACK;
310         opt.detect_rename = 1;
311         opt.rename_limit = ctx.cfg.renamelimit;
312         DIFF_OPT_SET(&opt, RECURSIVE);
313         if (ignorews)
314                 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
315         opt.format_callback = cgit_diff_tree_cb;
316         opt.format_callback_data = fn;
317         if (prefix) {
318                 opt.nr_paths = 1;
319                 opt.paths = &prefix;
320                 prefixlen = strlen(prefix);
321                 opt.pathlens = &prefixlen;
322         }
323         diff_setup_done(&opt);
324
325         if (old_sha1 && !is_null_sha1(old_sha1))
326                 diff_tree_sha1(old_sha1, new_sha1, "", &opt);
327         else
328                 diff_root_tree_sha1(new_sha1, "", &opt);
329         diffcore_std(&opt);
330         diff_flush(&opt);
331 }
332
333 void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
334 {
335         unsigned char *old_sha1 = NULL;
336
337         if (commit->parents)
338                 old_sha1 = commit->parents->item->object.sha1;
339         cgit_diff_tree(old_sha1, commit->object.sha1, fn, prefix,
340                        ctx.qry.ignorews);
341 }
342
343 int cgit_parse_snapshots_mask(const char *str)
344 {
345         const struct cgit_snapshot_format *f;
346         static const char *delim = " \t,:/|;";
347         int tl, sl, rv = 0;
348
349         /* favor legacy setting */
350         if(atoi(str))
351                 return 1;
352         for(;;) {
353                 str += strspn(str,delim);
354                 tl = strcspn(str,delim);
355                 if (!tl)
356                         break;
357                 for (f = cgit_snapshot_formats; f->suffix; f++) {
358                         sl = strlen(f->suffix);
359                         if((tl == sl && !strncmp(f->suffix, str, tl)) ||
360                            (tl == sl-1 && !strncmp(f->suffix+1, str, tl-1))) {
361                                 rv |= f->bit;
362                                 break;
363                         }
364                 }
365                 str += tl;
366         }
367         return rv;
368 }
369
370 int cgit_open_filter(struct cgit_filter *filter)
371 {
372
373         filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
374                 "Unable to duplicate STDOUT");
375         chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
376         filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
377         if (filter->pid == 0) {
378                 close(filter->pipe_fh[1]);
379                 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
380                         "Unable to use pipe as STDIN");
381                 execvp(filter->cmd, filter->argv);
382                 die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
383                         strerror(errno), errno);
384         }
385         close(filter->pipe_fh[0]);
386         chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
387                 "Unable to use pipe as STDOUT");
388         close(filter->pipe_fh[1]);
389         return 0;
390 }
391
392 int cgit_close_filter(struct cgit_filter *filter)
393 {
394         chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
395                 "Unable to restore STDOUT");
396         close(filter->old_stdout);
397         if (filter->pid < 0)
398                 return 0;
399         waitpid(filter->pid, &filter->exitstatus, 0);
400         if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
401                 return 0;
402         die("Subprocess %s exited abnormally", filter->cmd);
403 }
404
405 /* Read the content of the specified file into a newly allocated buffer,
406  * zeroterminate the buffer and return 0 on success, errno otherwise.
407  */
408 int readfile(const char *path, char **buf, size_t *size)
409 {
410         int fd, e;
411         struct stat st;
412
413         fd = open(path, O_RDONLY);
414         if (fd == -1)
415                 return errno;
416         if (fstat(fd, &st)) {
417                 e = errno;
418                 close(fd);
419                 return e;
420         }
421         if (!S_ISREG(st.st_mode)) {
422                 close(fd);
423                 return EISDIR;
424         }
425         *buf = xmalloc(st.st_size + 1);
426         *size = read_in_full(fd, *buf, st.st_size);
427         e = errno;
428         (*buf)[*size] = '\0';
429         close(fd);
430         return (*size == st.st_size ? 0 : e);
431 }
432
433 int is_token_char(char c)
434 {
435         return isalnum(c) || c == '_';
436 }
437
438 /* Replace name with getenv(name), return pointer to zero-terminating char
439  */
440 char *expand_macro(char *name, int maxlength)
441 {
442         char *value;
443         int len;
444
445         len = 0;
446         value = getenv(name);
447         if (value) {
448                 len = strlen(value);
449                 if (len > maxlength)
450                         len = maxlength;
451                 strncpy(name, value, len);
452         }
453         return name + len;
454 }
455
456 #define EXPBUFSIZE (1024 * 8)
457
458 /* Replace all tokens prefixed by '$' in the specified text with the
459  * value of the named environment variable.
460  * NB: the return value is a static buffer, i.e. it must be strdup'd
461  * by the caller.
462  */
463 char *expand_macros(const char *txt)
464 {
465         static char result[EXPBUFSIZE];
466         char *p, *start;
467         int len;
468
469         p = result;
470         start = NULL;
471         while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
472                 *p = *txt;
473                 if (start) {
474                         if (!is_token_char(*txt)) {
475                                 if (p - start > 0) {
476                                         *p = '\0';
477                                         len = result + EXPBUFSIZE - start - 1;
478                                         p = expand_macro(start, len) - 1;
479                                 }
480                                 start = NULL;
481                                 txt--;
482                         }
483                         p++;
484                         txt++;
485                         continue;
486                 }
487                 if (*txt == '$') {
488                         start = p;
489                         txt++;
490                         continue;
491                 }
492                 p++;
493                 txt++;
494         }
495         *p = '\0';
496         if (start && p - start > 0) {
497                 len = result + EXPBUFSIZE - start - 1;
498                 p = expand_macro(start, len);
499                 *p = '\0';
500         }
501         return result;
502 }