cgit.c (view raw)
1/* cgit.c: cgi for the git scm
2 *
3 * Copyright (C) 2006 Lars Hjemli
4 * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
5 *
6 * Licensed under GNU General Public License v2
7 * (see COPYING for full license text)
8 */
9
10#include "cgit.h"
11#include "cache.h"
12#include "cmd.h"
13#include "configfile.h"
14#include "html.h"
15#include "ui-shared.h"
16#include "ui-stats.h"
17#include "scan-tree.h"
18
19const char *cgit_version = CGIT_VERSION;
20
21void add_mimetype(const char *name, const char *value)
22{
23 struct string_list_item *item;
24
25 item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
26 item->util = xstrdup(value);
27}
28
29struct cgit_filter *new_filter(const char *cmd, int extra_args)
30{
31 struct cgit_filter *f;
32
33 if (!cmd || !cmd[0])
34 return NULL;
35
36 f = xmalloc(sizeof(struct cgit_filter));
37 f->cmd = xstrdup(cmd);
38 f->argv = xmalloc((2 + extra_args) * sizeof(char *));
39 f->argv[0] = f->cmd;
40 f->argv[1] = NULL;
41 return f;
42}
43
44static void process_cached_repolist(const char *path);
45
46void repo_config(struct cgit_repo *repo, const char *name, const char *value)
47{
48 if (!strcmp(name, "name"))
49 repo->name = xstrdup(value);
50 else if (!strcmp(name, "clone-url"))
51 repo->clone_url = xstrdup(value);
52 else if (!strcmp(name, "desc"))
53 repo->desc = xstrdup(value);
54 else if (!strcmp(name, "owner"))
55 repo->owner = xstrdup(value);
56 else if (!strcmp(name, "defbranch"))
57 repo->defbranch = xstrdup(value);
58 else if (!strcmp(name, "snapshots"))
59 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
60 else if (!strcmp(name, "enable-log-filecount"))
61 repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
62 else if (!strcmp(name, "enable-log-linecount"))
63 repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
64 else if (!strcmp(name, "enable-remote-branches"))
65 repo->enable_remote_branches = atoi(value);
66 else if (!strcmp(name, "enable-subject-links"))
67 repo->enable_subject_links = atoi(value);
68 else if (!strcmp(name, "max-stats"))
69 repo->max_stats = cgit_find_stats_period(value, NULL);
70 else if (!strcmp(name, "module-link"))
71 repo->module_link= xstrdup(value);
72 else if (!strcmp(name, "section"))
73 repo->section = xstrdup(value);
74 else if (!strcmp(name, "readme") && value != NULL) {
75 repo->readme = xstrdup(value);
76 } else if (ctx.cfg.enable_filter_overrides) {
77 if (!strcmp(name, "about-filter"))
78 repo->about_filter = new_filter(value, 0);
79 else if (!strcmp(name, "commit-filter"))
80 repo->commit_filter = new_filter(value, 0);
81 else if (!strcmp(name, "source-filter"))
82 repo->source_filter = new_filter(value, 1);
83 }
84}
85
86void config_cb(const char *name, const char *value)
87{
88 if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
89 ctx.cfg.section = xstrdup(value);
90 else if (!strcmp(name, "repo.url"))
91 ctx.repo = cgit_add_repo(value);
92 else if (ctx.repo && !strcmp(name, "repo.path"))
93 ctx.repo->path = trim_end(value, '/');
94 else if (ctx.repo && !prefixcmp(name, "repo."))
95 repo_config(ctx.repo, name + 5, value);
96 else if (!strcmp(name, "readme"))
97 ctx.cfg.readme = xstrdup(value);
98 else if (!strcmp(name, "root-title"))
99 ctx.cfg.root_title = xstrdup(value);
100 else if (!strcmp(name, "root-desc"))
101 ctx.cfg.root_desc = xstrdup(value);
102 else if (!strcmp(name, "root-readme"))
103 ctx.cfg.root_readme = xstrdup(value);
104 else if (!strcmp(name, "css"))
105 ctx.cfg.css = xstrdup(value);
106 else if (!strcmp(name, "favicon"))
107 ctx.cfg.favicon = xstrdup(value);
108 else if (!strcmp(name, "footer"))
109 ctx.cfg.footer = xstrdup(value);
110 else if (!strcmp(name, "head-include"))
111 ctx.cfg.head_include = xstrdup(value);
112 else if (!strcmp(name, "header"))
113 ctx.cfg.header = xstrdup(value);
114 else if (!strcmp(name, "logo"))
115 ctx.cfg.logo = xstrdup(value);
116 else if (!strcmp(name, "index-header"))
117 ctx.cfg.index_header = xstrdup(value);
118 else if (!strcmp(name, "index-info"))
119 ctx.cfg.index_info = xstrdup(value);
120 else if (!strcmp(name, "logo-link"))
121 ctx.cfg.logo_link = xstrdup(value);
122 else if (!strcmp(name, "module-link"))
123 ctx.cfg.module_link = xstrdup(value);
124 else if (!strcmp(name, "virtual-root")) {
125 ctx.cfg.virtual_root = trim_end(value, '/');
126 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
127 ctx.cfg.virtual_root = "";
128 } else if (!strcmp(name, "nocache"))
129 ctx.cfg.nocache = atoi(value);
130 else if (!strcmp(name, "noplainemail"))
131 ctx.cfg.noplainemail = atoi(value);
132 else if (!strcmp(name, "noheader"))
133 ctx.cfg.noheader = atoi(value);
134 else if (!strcmp(name, "snapshots"))
135 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
136 else if (!strcmp(name, "enable-filter-overrides"))
137 ctx.cfg.enable_filter_overrides = atoi(value);
138 else if (!strcmp(name, "enable-gitweb-owner"))
139 ctx.cfg.enable_gitweb_owner = atoi(value);
140 else if (!strcmp(name, "enable-index-links"))
141 ctx.cfg.enable_index_links = atoi(value);
142 else if (!strcmp(name, "enable-log-filecount"))
143 ctx.cfg.enable_log_filecount = atoi(value);
144 else if (!strcmp(name, "enable-log-linecount"))
145 ctx.cfg.enable_log_linecount = atoi(value);
146 else if (!strcmp(name, "enable-remote-branches"))
147 ctx.cfg.enable_remote_branches = atoi(value);
148 else if (!strcmp(name, "enable-subject-links"))
149 ctx.cfg.enable_subject_links = atoi(value);
150 else if (!strcmp(name, "enable-tree-linenumbers"))
151 ctx.cfg.enable_tree_linenumbers = atoi(value);
152 else if (!strcmp(name, "max-stats"))
153 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
154 else if (!strcmp(name, "cache-size"))
155 ctx.cfg.cache_size = atoi(value);
156 else if (!strcmp(name, "cache-root"))
157 ctx.cfg.cache_root = xstrdup(expand_macros(value));
158 else if (!strcmp(name, "cache-root-ttl"))
159 ctx.cfg.cache_root_ttl = atoi(value);
160 else if (!strcmp(name, "cache-repo-ttl"))
161 ctx.cfg.cache_repo_ttl = atoi(value);
162 else if (!strcmp(name, "cache-scanrc-ttl"))
163 ctx.cfg.cache_scanrc_ttl = atoi(value);
164 else if (!strcmp(name, "cache-static-ttl"))
165 ctx.cfg.cache_static_ttl = atoi(value);
166 else if (!strcmp(name, "cache-dynamic-ttl"))
167 ctx.cfg.cache_dynamic_ttl = atoi(value);
168 else if (!strcmp(name, "about-filter"))
169 ctx.cfg.about_filter = new_filter(value, 0);
170 else if (!strcmp(name, "commit-filter"))
171 ctx.cfg.commit_filter = new_filter(value, 0);
172 else if (!strcmp(name, "embedded"))
173 ctx.cfg.embedded = atoi(value);
174 else if (!strcmp(name, "max-atom-items"))
175 ctx.cfg.max_atom_items = atoi(value);
176 else if (!strcmp(name, "max-message-length"))
177 ctx.cfg.max_msg_len = atoi(value);
178 else if (!strcmp(name, "max-repodesc-length"))
179 ctx.cfg.max_repodesc_len = atoi(value);
180 else if (!strcmp(name, "max-blob-size"))
181 ctx.cfg.max_blob_size = atoi(value);
182 else if (!strcmp(name, "max-repo-count"))
183 ctx.cfg.max_repo_count = atoi(value);
184 else if (!strcmp(name, "max-commit-count"))
185 ctx.cfg.max_commit_count = atoi(value);
186 else if (!strcmp(name, "project-list"))
187 ctx.cfg.project_list = xstrdup(expand_macros(value));
188 else if (!strcmp(name, "scan-path"))
189 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
190 process_cached_repolist(expand_macros(value));
191 else if (ctx.cfg.project_list)
192 scan_projects(expand_macros(value),
193 ctx.cfg.project_list, repo_config);
194 else
195 scan_tree(expand_macros(value), repo_config);
196 else if (!strcmp(name, "source-filter"))
197 ctx.cfg.source_filter = new_filter(value, 1);
198 else if (!strcmp(name, "summary-log"))
199 ctx.cfg.summary_log = atoi(value);
200 else if (!strcmp(name, "summary-branches"))
201 ctx.cfg.summary_branches = atoi(value);
202 else if (!strcmp(name, "summary-tags"))
203 ctx.cfg.summary_tags = atoi(value);
204 else if (!strcmp(name, "side-by-side-diffs"))
205 ctx.cfg.ssdiff = atoi(value);
206 else if (!strcmp(name, "agefile"))
207 ctx.cfg.agefile = xstrdup(value);
208 else if (!strcmp(name, "renamelimit"))
209 ctx.cfg.renamelimit = atoi(value);
210 else if (!strcmp(name, "remove-suffix"))
211 ctx.cfg.remove_suffix = atoi(value);
212 else if (!strcmp(name, "robots"))
213 ctx.cfg.robots = xstrdup(value);
214 else if (!strcmp(name, "clone-prefix"))
215 ctx.cfg.clone_prefix = xstrdup(value);
216 else if (!strcmp(name, "local-time"))
217 ctx.cfg.local_time = atoi(value);
218 else if (!prefixcmp(name, "mimetype."))
219 add_mimetype(name + 9, value);
220 else if (!strcmp(name, "include"))
221 parse_configfile(expand_macros(value), config_cb);
222}
223
224static void querystring_cb(const char *name, const char *value)
225{
226 if (!value)
227 value = "";
228
229 if (!strcmp(name,"r")) {
230 ctx.qry.repo = xstrdup(value);
231 ctx.repo = cgit_get_repoinfo(value);
232 } else if (!strcmp(name, "p")) {
233 ctx.qry.page = xstrdup(value);
234 } else if (!strcmp(name, "url")) {
235 if (*value == '/')
236 value++;
237 ctx.qry.url = xstrdup(value);
238 cgit_parse_url(value);
239 } else if (!strcmp(name, "qt")) {
240 ctx.qry.grep = xstrdup(value);
241 } else if (!strcmp(name, "q")) {
242 ctx.qry.search = xstrdup(value);
243 } else if (!strcmp(name, "h")) {
244 ctx.qry.head = xstrdup(value);
245 ctx.qry.has_symref = 1;
246 } else if (!strcmp(name, "id")) {
247 ctx.qry.sha1 = xstrdup(value);
248 ctx.qry.has_sha1 = 1;
249 } else if (!strcmp(name, "id2")) {
250 ctx.qry.sha2 = xstrdup(value);
251 ctx.qry.has_sha1 = 1;
252 } else if (!strcmp(name, "ofs")) {
253 ctx.qry.ofs = atoi(value);
254 } else if (!strcmp(name, "path")) {
255 ctx.qry.path = trim_end(value, '/');
256 } else if (!strcmp(name, "name")) {
257 ctx.qry.name = xstrdup(value);
258 } else if (!strcmp(name, "mimetype")) {
259 ctx.qry.mimetype = xstrdup(value);
260 } else if (!strcmp(name, "s")){
261 ctx.qry.sort = xstrdup(value);
262 } else if (!strcmp(name, "showmsg")) {
263 ctx.qry.showmsg = atoi(value);
264 } else if (!strcmp(name, "period")) {
265 ctx.qry.period = xstrdup(value);
266 } else if (!strcmp(name, "ss")) {
267 ctx.qry.ssdiff = atoi(value);
268 } else if (!strcmp(name, "all")) {
269 ctx.qry.show_all = atoi(value);
270 } else if (!strcmp(name, "context")) {
271 ctx.qry.context = atoi(value);
272 } else if (!strcmp(name, "ignorews")) {
273 ctx.qry.ignorews = atoi(value);
274 }
275}
276
277char *xstrdupn(const char *str)
278{
279 return (str ? xstrdup(str) : NULL);
280}
281
282static void prepare_context(struct cgit_context *ctx)
283{
284 memset(ctx, 0, sizeof(*ctx));
285 ctx->cfg.agefile = "info/web/last-modified";
286 ctx->cfg.nocache = 0;
287 ctx->cfg.cache_size = 0;
288 ctx->cfg.cache_dynamic_ttl = 5;
289 ctx->cfg.cache_max_create_time = 5;
290 ctx->cfg.cache_repo_ttl = 5;
291 ctx->cfg.cache_root = CGIT_CACHE_ROOT;
292 ctx->cfg.cache_root_ttl = 5;
293 ctx->cfg.cache_scanrc_ttl = 15;
294 ctx->cfg.cache_static_ttl = -1;
295 ctx->cfg.css = "/cgit.css";
296 ctx->cfg.logo = "/cgit.png";
297 ctx->cfg.local_time = 0;
298 ctx->cfg.enable_gitweb_owner = 1;
299 ctx->cfg.enable_tree_linenumbers = 1;
300 ctx->cfg.max_repo_count = 50;
301 ctx->cfg.max_commit_count = 50;
302 ctx->cfg.max_lock_attempts = 5;
303 ctx->cfg.max_msg_len = 80;
304 ctx->cfg.max_repodesc_len = 80;
305 ctx->cfg.max_blob_size = 0;
306 ctx->cfg.max_stats = 0;
307 ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
308 ctx->cfg.project_list = NULL;
309 ctx->cfg.renamelimit = -1;
310 ctx->cfg.remove_suffix = 0;
311 ctx->cfg.robots = "index, nofollow";
312 ctx->cfg.root_title = "Git repository browser";
313 ctx->cfg.root_desc = "a fast webinterface for the git dscm";
314 ctx->cfg.script_name = CGIT_SCRIPT_NAME;
315 ctx->cfg.section = "";
316 ctx->cfg.summary_branches = 10;
317 ctx->cfg.summary_log = 10;
318 ctx->cfg.summary_tags = 10;
319 ctx->cfg.max_atom_items = 10;
320 ctx->cfg.ssdiff = 0;
321 ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
322 ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
323 ctx->env.https = xstrdupn(getenv("HTTPS"));
324 ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
325 ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
326 ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
327 ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
328 ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
329 ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
330 ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
331 ctx->page.mimetype = "text/html";
332 ctx->page.charset = PAGE_ENCODING;
333 ctx->page.filename = NULL;
334 ctx->page.size = 0;
335 ctx->page.modified = time(NULL);
336 ctx->page.expires = ctx->page.modified;
337 ctx->page.etag = NULL;
338 memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
339 if (ctx->env.script_name)
340 ctx->cfg.script_name = ctx->env.script_name;
341 if (ctx->env.query_string)
342 ctx->qry.raw = ctx->env.query_string;
343 if (!ctx->env.cgit_config)
344 ctx->env.cgit_config = CGIT_CONFIG;
345}
346
347struct refmatch {
348 char *req_ref;
349 char *first_ref;
350 int match;
351};
352
353int find_current_ref(const char *refname, const unsigned char *sha1,
354 int flags, void *cb_data)
355{
356 struct refmatch *info;
357
358 info = (struct refmatch *)cb_data;
359 if (!strcmp(refname, info->req_ref))
360 info->match = 1;
361 if (!info->first_ref)
362 info->first_ref = xstrdup(refname);
363 return info->match;
364}
365
366char *find_default_branch(struct cgit_repo *repo)
367{
368 struct refmatch info;
369 char *ref;
370
371 info.req_ref = repo->defbranch;
372 info.first_ref = NULL;
373 info.match = 0;
374 for_each_branch_ref(find_current_ref, &info);
375 if (info.match)
376 ref = info.req_ref;
377 else
378 ref = info.first_ref;
379 if (ref)
380 ref = xstrdup(ref);
381 return ref;
382}
383
384static int prepare_repo_cmd(struct cgit_context *ctx)
385{
386 char *tmp;
387 unsigned char sha1[20];
388 int nongit = 0;
389
390 setenv("GIT_DIR", ctx->repo->path, 1);
391 setup_git_directory_gently(&nongit);
392 if (nongit) {
393 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
394 "config error");
395 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
396 ctx->repo = NULL;
397 cgit_print_http_headers(ctx);
398 cgit_print_docstart(ctx);
399 cgit_print_pageheader(ctx);
400 cgit_print_error(tmp);
401 cgit_print_docend();
402 return 1;
403 }
404 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
405
406 if (!ctx->qry.head) {
407 ctx->qry.nohead = 1;
408 ctx->qry.head = find_default_branch(ctx->repo);
409 ctx->repo->defbranch = ctx->qry.head;
410 }
411
412 if (!ctx->qry.head) {
413 cgit_print_http_headers(ctx);
414 cgit_print_docstart(ctx);
415 cgit_print_pageheader(ctx);
416 cgit_print_error("Repository seems to be empty");
417 cgit_print_docend();
418 return 1;
419 }
420
421 if (get_sha1(ctx->qry.head, sha1)) {
422 tmp = xstrdup(ctx->qry.head);
423 ctx->qry.head = ctx->repo->defbranch;
424 ctx->page.status = 404;
425 ctx->page.statusmsg = "not found";
426 cgit_print_http_headers(ctx);
427 cgit_print_docstart(ctx);
428 cgit_print_pageheader(ctx);
429 cgit_print_error(fmt("Invalid branch: %s", tmp));
430 cgit_print_docend();
431 return 1;
432 }
433 return 0;
434}
435
436static void process_request(void *cbdata)
437{
438 struct cgit_context *ctx = cbdata;
439 struct cgit_cmd *cmd;
440
441 cmd = cgit_get_cmd(ctx);
442 if (!cmd) {
443 ctx->page.title = "cgit error";
444 cgit_print_http_headers(ctx);
445 cgit_print_docstart(ctx);
446 cgit_print_pageheader(ctx);
447 cgit_print_error("Invalid request");
448 cgit_print_docend();
449 return;
450 }
451
452 /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
453 * in-project path limit to be made available at ctx->qry.vpath.
454 * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
455 */
456 ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
457
458 if (cmd->want_repo && !ctx->repo) {
459 cgit_print_http_headers(ctx);
460 cgit_print_docstart(ctx);
461 cgit_print_pageheader(ctx);
462 cgit_print_error(fmt("No repository selected"));
463 cgit_print_docend();
464 return;
465 }
466
467 if (ctx->repo && prepare_repo_cmd(ctx))
468 return;
469
470 if (cmd->want_layout) {
471 cgit_print_http_headers(ctx);
472 cgit_print_docstart(ctx);
473 cgit_print_pageheader(ctx);
474 }
475
476 cmd->fn(ctx);
477
478 if (cmd->want_layout)
479 cgit_print_docend();
480}
481
482int cmp_repos(const void *a, const void *b)
483{
484 const struct cgit_repo *ra = a, *rb = b;
485 return strcmp(ra->url, rb->url);
486}
487
488char *build_snapshot_setting(int bitmap)
489{
490 const struct cgit_snapshot_format *f;
491 char *result = xstrdup("");
492 char *tmp;
493 int len;
494
495 for (f = cgit_snapshot_formats; f->suffix; f++) {
496 if (f->bit & bitmap) {
497 tmp = result;
498 result = xstrdup(fmt("%s%s ", tmp, f->suffix));
499 free(tmp);
500 }
501 }
502 len = strlen(result);
503 if (len)
504 result[len - 1] = '\0';
505 return result;
506}
507
508char *get_first_line(char *txt)
509{
510 char *t = xstrdup(txt);
511 char *p = strchr(t, '\n');
512 if (p)
513 *p = '\0';
514 return t;
515}
516
517void print_repo(FILE *f, struct cgit_repo *repo)
518{
519 fprintf(f, "repo.url=%s\n", repo->url);
520 fprintf(f, "repo.name=%s\n", repo->name);
521 fprintf(f, "repo.path=%s\n", repo->path);
522 if (repo->owner)
523 fprintf(f, "repo.owner=%s\n", repo->owner);
524 if (repo->desc) {
525 char *tmp = get_first_line(repo->desc);
526 fprintf(f, "repo.desc=%s\n", tmp);
527 free(tmp);
528 }
529 if (repo->readme)
530 fprintf(f, "repo.readme=%s\n", repo->readme);
531 if (repo->defbranch)
532 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
533 if (repo->module_link)
534 fprintf(f, "repo.module-link=%s\n", repo->module_link);
535 if (repo->section)
536 fprintf(f, "repo.section=%s\n", repo->section);
537 if (repo->clone_url)
538 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
539 fprintf(f, "repo.enable-log-filecount=%d\n",
540 repo->enable_log_filecount);
541 fprintf(f, "repo.enable-log-linecount=%d\n",
542 repo->enable_log_linecount);
543 if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
544 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
545 if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
546 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
547 if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
548 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
549 if (repo->snapshots != ctx.cfg.snapshots) {
550 char *tmp = build_snapshot_setting(repo->snapshots);
551 fprintf(f, "repo.snapshots=%s\n", tmp);
552 free(tmp);
553 }
554 if (repo->max_stats != ctx.cfg.max_stats)
555 fprintf(f, "repo.max-stats=%s\n",
556 cgit_find_stats_periodname(repo->max_stats));
557 fprintf(f, "\n");
558}
559
560void print_repolist(FILE *f, struct cgit_repolist *list, int start)
561{
562 int i;
563
564 for(i = start; i < list->count; i++)
565 print_repo(f, &list->repos[i]);
566}
567
568/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
569 * and return 0 on success.
570 */
571static int generate_cached_repolist(const char *path, const char *cached_rc)
572{
573 char *locked_rc;
574 int idx;
575 FILE *f;
576
577 locked_rc = xstrdup(fmt("%s.lock", cached_rc));
578 f = fopen(locked_rc, "wx");
579 if (!f) {
580 /* Inform about the error unless the lockfile already existed,
581 * since that only means we've got concurrent requests.
582 */
583 if (errno != EEXIST)
584 fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
585 locked_rc, strerror(errno), errno);
586 return errno;
587 }
588 idx = cgit_repolist.count;
589 if (ctx.cfg.project_list)
590 scan_projects(path, ctx.cfg.project_list, repo_config);
591 else
592 scan_tree(path, repo_config);
593 print_repolist(f, &cgit_repolist, idx);
594 if (rename(locked_rc, cached_rc))
595 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
596 locked_rc, cached_rc, strerror(errno), errno);
597 fclose(f);
598 return 0;
599}
600
601static void process_cached_repolist(const char *path)
602{
603 struct stat st;
604 char *cached_rc;
605 time_t age;
606 unsigned long hash;
607
608 hash = hash_str(path);
609 if (ctx.cfg.project_list)
610 hash += hash_str(ctx.cfg.project_list);
611 cached_rc = xstrdup(fmt("%s/rc-%8x", ctx.cfg.cache_root, hash));
612
613 if (stat(cached_rc, &st)) {
614 /* Nothing is cached, we need to scan without forking. And
615 * if we fail to generate a cached repolist, we need to
616 * invoke scan_tree manually.
617 */
618 if (generate_cached_repolist(path, cached_rc)) {
619 if (ctx.cfg.project_list)
620 scan_projects(path, ctx.cfg.project_list,
621 repo_config);
622 else
623 scan_tree(path, repo_config);
624 }
625 return;
626 }
627
628 parse_configfile(cached_rc, config_cb);
629
630 /* If the cached configfile hasn't expired, lets exit now */
631 age = time(NULL) - st.st_mtime;
632 if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
633 return;
634
635 /* The cached repolist has been parsed, but it was old. So lets
636 * rescan the specified path and generate a new cached repolist
637 * in a child-process to avoid latency for the current request.
638 */
639 if (fork())
640 return;
641
642 exit(generate_cached_repolist(path, cached_rc));
643}
644
645static void cgit_parse_args(int argc, const char **argv)
646{
647 int i;
648 int scan = 0;
649
650 for (i = 1; i < argc; i++) {
651 if (!strncmp(argv[i], "--cache=", 8)) {
652 ctx.cfg.cache_root = xstrdup(argv[i]+8);
653 }
654 if (!strcmp(argv[i], "--nocache")) {
655 ctx.cfg.nocache = 1;
656 }
657 if (!strcmp(argv[i], "--nohttp")) {
658 ctx.env.no_http = "1";
659 }
660 if (!strncmp(argv[i], "--query=", 8)) {
661 ctx.qry.raw = xstrdup(argv[i]+8);
662 }
663 if (!strncmp(argv[i], "--repo=", 7)) {
664 ctx.qry.repo = xstrdup(argv[i]+7);
665 }
666 if (!strncmp(argv[i], "--page=", 7)) {
667 ctx.qry.page = xstrdup(argv[i]+7);
668 }
669 if (!strncmp(argv[i], "--head=", 7)) {
670 ctx.qry.head = xstrdup(argv[i]+7);
671 ctx.qry.has_symref = 1;
672 }
673 if (!strncmp(argv[i], "--sha1=", 7)) {
674 ctx.qry.sha1 = xstrdup(argv[i]+7);
675 ctx.qry.has_sha1 = 1;
676 }
677 if (!strncmp(argv[i], "--ofs=", 6)) {
678 ctx.qry.ofs = atoi(argv[i]+6);
679 }
680 if (!strncmp(argv[i], "--scan-tree=", 12) ||
681 !strncmp(argv[i], "--scan-path=", 12)) {
682 /* HACK: the global snapshot bitmask defines the
683 * set of allowed snapshot formats, but the config
684 * file hasn't been parsed yet so the mask is
685 * currently 0. By setting all bits high before
686 * scanning we make sure that any in-repo cgitrc
687 * snapshot setting is respected by scan_tree().
688 * BTW: we assume that there'll never be more than
689 * 255 different snapshot formats supported by cgit...
690 */
691 ctx.cfg.snapshots = 0xFF;
692 scan++;
693 scan_tree(argv[i] + 12, repo_config);
694 }
695 }
696 if (scan) {
697 qsort(cgit_repolist.repos, cgit_repolist.count,
698 sizeof(struct cgit_repo), cmp_repos);
699 print_repolist(stdout, &cgit_repolist, 0);
700 exit(0);
701 }
702}
703
704static int calc_ttl()
705{
706 if (!ctx.repo)
707 return ctx.cfg.cache_root_ttl;
708
709 if (!ctx.qry.page)
710 return ctx.cfg.cache_repo_ttl;
711
712 if (ctx.qry.has_symref)
713 return ctx.cfg.cache_dynamic_ttl;
714
715 if (ctx.qry.has_sha1)
716 return ctx.cfg.cache_static_ttl;
717
718 return ctx.cfg.cache_repo_ttl;
719}
720
721int main(int argc, const char **argv)
722{
723 const char *path;
724 char *qry;
725 int err, ttl;
726
727 prepare_context(&ctx);
728 cgit_repolist.length = 0;
729 cgit_repolist.count = 0;
730 cgit_repolist.repos = NULL;
731
732 cgit_parse_args(argc, argv);
733 parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
734 ctx.repo = NULL;
735 http_parse_querystring(ctx.qry.raw, querystring_cb);
736
737 /* If virtual-root isn't specified in cgitrc, lets pretend
738 * that virtual-root equals SCRIPT_NAME.
739 */
740 if (!ctx.cfg.virtual_root)
741 ctx.cfg.virtual_root = ctx.cfg.script_name;
742
743 /* If no url parameter is specified on the querystring, lets
744 * use PATH_INFO as url. This allows cgit to work with virtual
745 * urls without the need for rewriterules in the webserver (as
746 * long as PATH_INFO is included in the cache lookup key).
747 */
748 path = ctx.env.path_info;
749 if (!ctx.qry.url && path) {
750 if (path[0] == '/')
751 path++;
752 ctx.qry.url = xstrdup(path);
753 if (ctx.qry.raw) {
754 qry = ctx.qry.raw;
755 ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
756 free(qry);
757 } else
758 ctx.qry.raw = xstrdup(ctx.qry.url);
759 cgit_parse_url(ctx.qry.url);
760 }
761
762 ttl = calc_ttl();
763 ctx.page.expires += ttl*60;
764 if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
765 ctx.cfg.nocache = 1;
766 if (ctx.cfg.nocache)
767 ctx.cfg.cache_size = 0;
768 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
769 ctx.qry.raw, ttl, process_request, &ctx);
770 if (err)
771 cgit_print_error(fmt("Error processing page: %s (%d)",
772 strerror(err), err));
773 return err;
774}