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#include <stdio.h>
11
12struct cgit_repolist cgit_repolist;
13struct cgit_context ctx;
14
15int chk_zero(int result, char *msg)
16{
17 if (result != 0)
18 die_errno("%s", msg);
19 return result;
20}
21
22int chk_positive(int result, char *msg)
23{
24 if (result <= 0)
25 die_errno("%s", msg);
26 return result;
27}
28
29int chk_non_negative(int result, char *msg)
30{
31 if (result < 0)
32 die_errno("%s", msg);
33 return result;
34}
35
36char *cgit_default_repo_desc = "[no description]";
37struct cgit_repo *cgit_add_repo(const char *url)
38{
39 struct cgit_repo *ret;
40
41 if (++cgit_repolist.count > cgit_repolist.length) {
42 if (cgit_repolist.length == 0)
43 cgit_repolist.length = 8;
44 else
45 cgit_repolist.length *= 2;
46 cgit_repolist.repos = xrealloc(cgit_repolist.repos,
47 cgit_repolist.length *
48 sizeof(struct cgit_repo));
49 }
50
51 ret = &cgit_repolist.repos[cgit_repolist.count-1];
52 memset(ret, 0, sizeof(struct cgit_repo));
53 ret->url = trim_end(url, '/');
54 ret->name = ret->url;
55 ret->path = NULL;
56 ret->desc = cgit_default_repo_desc;
57 ret->owner = NULL;
58 ret->section = ctx.cfg.section;
59 ret->snapshots = ctx.cfg.snapshots;
60 ret->enable_commit_graph = ctx.cfg.enable_commit_graph;
61 ret->enable_log_filecount = ctx.cfg.enable_log_filecount;
62 ret->enable_log_linecount = ctx.cfg.enable_log_linecount;
63 ret->enable_remote_branches = ctx.cfg.enable_remote_branches;
64 ret->enable_subject_links = ctx.cfg.enable_subject_links;
65 ret->max_stats = ctx.cfg.max_stats;
66 ret->branch_sort = ctx.cfg.branch_sort;
67 ret->commit_sort = ctx.cfg.commit_sort;
68 ret->module_link = ctx.cfg.module_link;
69 ret->readme = ctx.cfg.readme;
70 ret->mtime = -1;
71 ret->about_filter = ctx.cfg.about_filter;
72 ret->commit_filter = ctx.cfg.commit_filter;
73 ret->source_filter = ctx.cfg.source_filter;
74 ret->clone_url = ctx.cfg.clone_url;
75 ret->submodules.strdup_strings = 1;
76 return ret;
77}
78
79struct cgit_repo *cgit_get_repoinfo(const char *url)
80{
81 int i;
82 struct cgit_repo *repo;
83
84 for (i = 0; i < cgit_repolist.count; i++) {
85 repo = &cgit_repolist.repos[i];
86 if (!strcmp(repo->url, url))
87 return repo;
88 }
89 return NULL;
90}
91
92void *cgit_free_commitinfo(struct commitinfo *info)
93{
94 free(info->author);
95 free(info->author_email);
96 free(info->committer);
97 free(info->committer_email);
98 free(info->subject);
99 free(info->msg);
100 free(info->msg_encoding);
101 free(info);
102 return NULL;
103}
104
105char *trim_end(const char *str, char c)
106{
107 int len;
108
109 if (str == NULL)
110 return NULL;
111 len = strlen(str);
112 while (len > 0 && str[len - 1] == c)
113 len--;
114 if (len == 0)
115 return NULL;
116 return xstrndup(str, len);
117}
118
119char *ensure_end(const char *str, char c)
120{
121 size_t len = strlen(str);
122 char *result;
123
124 if (len && str[len - 1] == c)
125 return xstrndup(str, len);
126
127 result = xmalloc(len + 2);
128 memcpy(result, str, len);
129 result[len] = '/';
130 result[len + 1] = '\0';
131 return result;
132}
133
134void strbuf_ensure_end(struct strbuf *sb, char c)
135{
136 if (!sb->len || sb->buf[sb->len - 1] != c)
137 strbuf_addch(sb, c);
138}
139
140char *strlpart(char *txt, int maxlen)
141{
142 char *result;
143
144 if (!txt)
145 return txt;
146
147 if (strlen(txt) <= maxlen)
148 return txt;
149 result = xmalloc(maxlen + 1);
150 memcpy(result, txt, maxlen - 3);
151 result[maxlen-1] = result[maxlen-2] = result[maxlen-3] = '.';
152 result[maxlen] = '\0';
153 return result;
154}
155
156char *strrpart(char *txt, int maxlen)
157{
158 char *result;
159
160 if (!txt)
161 return txt;
162
163 if (strlen(txt) <= maxlen)
164 return txt;
165 result = xmalloc(maxlen + 1);
166 memcpy(result + 3, txt + strlen(txt) - maxlen + 4, maxlen - 3);
167 result[0] = result[1] = result[2] = '.';
168 return result;
169}
170
171void cgit_add_ref(struct reflist *list, struct refinfo *ref)
172{
173 size_t size;
174
175 if (list->count >= list->alloc) {
176 list->alloc += (list->alloc ? list->alloc : 4);
177 size = list->alloc * sizeof(struct refinfo *);
178 list->refs = xrealloc(list->refs, size);
179 }
180 list->refs[list->count++] = ref;
181}
182
183static struct refinfo *cgit_mk_refinfo(const char *refname, const unsigned char *sha1)
184{
185 struct refinfo *ref;
186
187 ref = xmalloc(sizeof (struct refinfo));
188 ref->refname = xstrdup(refname);
189 ref->object = parse_object(sha1);
190 switch (ref->object->type) {
191 case OBJ_TAG:
192 ref->tag = cgit_parse_tag((struct tag *)ref->object);
193 break;
194 case OBJ_COMMIT:
195 ref->commit = cgit_parse_commit((struct commit *)ref->object);
196 break;
197 }
198 return ref;
199}
200
201static void cgit_free_taginfo(struct taginfo *tag)
202{
203 if (tag->tagger)
204 free(tag->tagger);
205 if (tag->tagger_email)
206 free(tag->tagger_email);
207 if (tag->msg)
208 free(tag->msg);
209 free(tag);
210}
211
212static void cgit_free_refinfo(struct refinfo *ref)
213{
214 if (ref->refname)
215 free((char *)ref->refname);
216 switch (ref->object->type) {
217 case OBJ_TAG:
218 cgit_free_taginfo(ref->tag);
219 break;
220 case OBJ_COMMIT:
221 cgit_free_commitinfo(ref->commit);
222 break;
223 }
224 free(ref);
225}
226
227void cgit_free_reflist_inner(struct reflist *list)
228{
229 int i;
230
231 for (i = 0; i < list->count; i++) {
232 cgit_free_refinfo(list->refs[i]);
233 }
234 free(list->refs);
235}
236
237int cgit_refs_cb(const char *refname, const unsigned char *sha1, int flags,
238 void *cb_data)
239{
240 struct reflist *list = (struct reflist *)cb_data;
241 struct refinfo *info = cgit_mk_refinfo(refname, sha1);
242
243 if (info)
244 cgit_add_ref(list, info);
245 return 0;
246}
247
248static void cgit_diff_tree_cb(struct diff_queue_struct *q,
249 struct diff_options *options, void *data)
250{
251 int i;
252
253 for (i = 0; i < q->nr; i++) {
254 if (q->queue[i]->status == 'U')
255 continue;
256 ((filepair_fn)data)(q->queue[i]);
257 }
258}
259
260static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
261{
262 enum object_type type;
263
264 if (is_null_sha1(sha1)) {
265 file->ptr = (char *)"";
266 file->size = 0;
267 } else {
268 file->ptr = read_sha1_file(sha1, &type,
269 (unsigned long *)&file->size);
270 }
271 return 1;
272}
273
274/*
275 * Receive diff-buffers from xdiff and concatenate them as
276 * needed across multiple callbacks.
277 *
278 * This is basically a copy of xdiff-interface.c/xdiff_outf(),
279 * ripped from git and modified to use globals instead of
280 * a special callback-struct.
281 */
282char *diffbuf = NULL;
283int buflen = 0;
284
285static int filediff_cb(void *priv, mmbuffer_t *mb, int nbuf)
286{
287 int i;
288
289 for (i = 0; i < nbuf; i++) {
290 if (mb[i].ptr[mb[i].size-1] != '\n') {
291 /* Incomplete line */
292 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
293 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
294 buflen += mb[i].size;
295 continue;
296 }
297
298 /* we have a complete line */
299 if (!diffbuf) {
300 ((linediff_fn)priv)(mb[i].ptr, mb[i].size);
301 continue;
302 }
303 diffbuf = xrealloc(diffbuf, buflen + mb[i].size);
304 memcpy(diffbuf + buflen, mb[i].ptr, mb[i].size);
305 ((linediff_fn)priv)(diffbuf, buflen + mb[i].size);
306 free(diffbuf);
307 diffbuf = NULL;
308 buflen = 0;
309 }
310 if (diffbuf) {
311 ((linediff_fn)priv)(diffbuf, buflen);
312 free(diffbuf);
313 diffbuf = NULL;
314 buflen = 0;
315 }
316 return 0;
317}
318
319int cgit_diff_files(const unsigned char *old_sha1,
320 const unsigned char *new_sha1, unsigned long *old_size,
321 unsigned long *new_size, int *binary, int context,
322 int ignorews, linediff_fn fn)
323{
324 mmfile_t file1, file2;
325 xpparam_t diff_params;
326 xdemitconf_t emit_params;
327 xdemitcb_t emit_cb;
328
329 if (!load_mmfile(&file1, old_sha1) || !load_mmfile(&file2, new_sha1))
330 return 1;
331
332 *old_size = file1.size;
333 *new_size = file2.size;
334
335 if ((file1.ptr && buffer_is_binary(file1.ptr, file1.size)) ||
336 (file2.ptr && buffer_is_binary(file2.ptr, file2.size))) {
337 *binary = 1;
338 if (file1.size)
339 free(file1.ptr);
340 if (file2.size)
341 free(file2.ptr);
342 return 0;
343 }
344
345 memset(&diff_params, 0, sizeof(diff_params));
346 memset(&emit_params, 0, sizeof(emit_params));
347 memset(&emit_cb, 0, sizeof(emit_cb));
348 diff_params.flags = XDF_NEED_MINIMAL;
349 if (ignorews)
350 diff_params.flags |= XDF_IGNORE_WHITESPACE;
351 emit_params.ctxlen = context > 0 ? context : 3;
352 emit_params.flags = XDL_EMIT_FUNCNAMES;
353 emit_cb.outf = filediff_cb;
354 emit_cb.priv = fn;
355 xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
356 if (file1.size)
357 free(file1.ptr);
358 if (file2.size)
359 free(file2.ptr);
360 return 0;
361}
362
363void cgit_diff_tree(const unsigned char *old_sha1,
364 const unsigned char *new_sha1,
365 filepair_fn fn, const char *prefix, int ignorews)
366{
367 struct diff_options opt;
368 struct pathspec_item item;
369
370 diff_setup(&opt);
371 opt.output_format = DIFF_FORMAT_CALLBACK;
372 opt.detect_rename = 1;
373 opt.rename_limit = ctx.cfg.renamelimit;
374 DIFF_OPT_SET(&opt, RECURSIVE);
375 if (ignorews)
376 DIFF_XDL_SET(&opt, IGNORE_WHITESPACE);
377 opt.format_callback = cgit_diff_tree_cb;
378 opt.format_callback_data = fn;
379 if (prefix) {
380 item.match = prefix;
381 item.len = strlen(prefix);
382 opt.pathspec.nr = 1;
383 opt.pathspec.items = &item;
384 }
385 diff_setup_done(&opt);
386
387 if (old_sha1 && !is_null_sha1(old_sha1))
388 diff_tree_sha1(old_sha1, new_sha1, "", &opt);
389 else
390 diff_root_tree_sha1(new_sha1, "", &opt);
391 diffcore_std(&opt);
392 diff_flush(&opt);
393}
394
395void cgit_diff_commit(struct commit *commit, filepair_fn fn, const char *prefix)
396{
397 unsigned char *old_sha1 = NULL;
398
399 if (commit->parents)
400 old_sha1 = commit->parents->item->object.sha1;
401 cgit_diff_tree(old_sha1, commit->object.sha1, fn, prefix,
402 ctx.qry.ignorews);
403}
404
405int cgit_parse_snapshots_mask(const char *str)
406{
407 const struct cgit_snapshot_format *f;
408 static const char *delim = " \t,:/|;";
409 int tl, sl, rv = 0;
410
411 /* favor legacy setting */
412 if (atoi(str))
413 return 1;
414 for (;;) {
415 str += strspn(str, delim);
416 tl = strcspn(str, delim);
417 if (!tl)
418 break;
419 for (f = cgit_snapshot_formats; f->suffix; f++) {
420 sl = strlen(f->suffix);
421 if ((tl == sl && !strncmp(f->suffix, str, tl)) ||
422 (tl == sl - 1 && !strncmp(f->suffix + 1, str, tl - 1))) {
423 rv |= f->bit;
424 break;
425 }
426 }
427 str += tl;
428 }
429 return rv;
430}
431
432typedef struct {
433 char * name;
434 char * value;
435} cgit_env_var;
436
437void cgit_prepare_repo_env(struct cgit_repo * repo)
438{
439 cgit_env_var env_vars[] = {
440 { .name = "CGIT_REPO_URL", .value = repo->url },
441 { .name = "CGIT_REPO_NAME", .value = repo->name },
442 { .name = "CGIT_REPO_PATH", .value = repo->path },
443 { .name = "CGIT_REPO_OWNER", .value = repo->owner },
444 { .name = "CGIT_REPO_DEFBRANCH", .value = repo->defbranch },
445 { .name = "CGIT_REPO_SECTION", .value = repo->section },
446 { .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
447 };
448 int env_var_count = ARRAY_SIZE(env_vars);
449 cgit_env_var *p, *q;
450 static char *warn = "cgit warning: failed to set env: %s=%s\n";
451
452 p = env_vars;
453 q = p + env_var_count;
454 for (; p < q; p++)
455 if (p->value && setenv(p->name, p->value, 1))
456 fprintf(stderr, warn, p->name, p->value);
457}
458
459int cgit_open_filter(struct cgit_filter *filter)
460{
461
462 filter->old_stdout = chk_positive(dup(STDOUT_FILENO),
463 "Unable to duplicate STDOUT");
464 chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
465 filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
466 if (filter->pid == 0) {
467 close(filter->pipe_fh[1]);
468 chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
469 "Unable to use pipe as STDIN");
470 execvp(filter->cmd, filter->argv);
471 die_errno("Unable to exec subprocess %s", filter->cmd);
472 }
473 close(filter->pipe_fh[0]);
474 chk_non_negative(dup2(filter->pipe_fh[1], STDOUT_FILENO),
475 "Unable to use pipe as STDOUT");
476 close(filter->pipe_fh[1]);
477 return 0;
478}
479
480int cgit_close_filter(struct cgit_filter *filter)
481{
482 chk_non_negative(dup2(filter->old_stdout, STDOUT_FILENO),
483 "Unable to restore STDOUT");
484 close(filter->old_stdout);
485 if (filter->pid < 0)
486 return 0;
487 waitpid(filter->pid, &filter->exitstatus, 0);
488 if (WIFEXITED(filter->exitstatus) && !WEXITSTATUS(filter->exitstatus))
489 return 0;
490 die("Subprocess %s exited abnormally", filter->cmd);
491}
492
493/* Read the content of the specified file into a newly allocated buffer,
494 * zeroterminate the buffer and return 0 on success, errno otherwise.
495 */
496int readfile(const char *path, char **buf, size_t *size)
497{
498 int fd, e;
499 struct stat st;
500
501 fd = open(path, O_RDONLY);
502 if (fd == -1)
503 return errno;
504 if (fstat(fd, &st)) {
505 e = errno;
506 close(fd);
507 return e;
508 }
509 if (!S_ISREG(st.st_mode)) {
510 close(fd);
511 return EISDIR;
512 }
513 *buf = xmalloc(st.st_size + 1);
514 *size = read_in_full(fd, *buf, st.st_size);
515 e = errno;
516 (*buf)[*size] = '\0';
517 close(fd);
518 return (*size == st.st_size ? 0 : e);
519}
520
521static int is_token_char(char c)
522{
523 return isalnum(c) || c == '_';
524}
525
526/* Replace name with getenv(name), return pointer to zero-terminating char
527 */
528static char *expand_macro(char *name, int maxlength)
529{
530 char *value;
531 int len;
532
533 len = 0;
534 value = getenv(name);
535 if (value) {
536 len = strlen(value);
537 if (len > maxlength)
538 len = maxlength;
539 strncpy(name, value, len);
540 }
541 return name + len;
542}
543
544#define EXPBUFSIZE (1024 * 8)
545
546/* Replace all tokens prefixed by '$' in the specified text with the
547 * value of the named environment variable.
548 * NB: the return value is a static buffer, i.e. it must be strdup'd
549 * by the caller.
550 */
551char *expand_macros(const char *txt)
552{
553 static char result[EXPBUFSIZE];
554 char *p, *start;
555 int len;
556
557 p = result;
558 start = NULL;
559 while (p < result + EXPBUFSIZE - 1 && txt && *txt) {
560 *p = *txt;
561 if (start) {
562 if (!is_token_char(*txt)) {
563 if (p - start > 0) {
564 *p = '\0';
565 len = result + EXPBUFSIZE - start - 1;
566 p = expand_macro(start, len) - 1;
567 }
568 start = NULL;
569 txt--;
570 }
571 p++;
572 txt++;
573 continue;
574 }
575 if (*txt == '$') {
576 start = p;
577 txt++;
578 continue;
579 }
580 p++;
581 txt++;
582 }
583 *p = '\0';
584 if (start && p - start > 0) {
585 len = result + EXPBUFSIZE - start - 1;
586 p = expand_macro(start, len);
587 *p = '\0';
588 }
589 return result;
590}