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 int args_size = 0;
33
34 if (!cmd || !cmd[0])
35 return NULL;
36
37 f = xmalloc(sizeof(struct cgit_filter));
38 f->cmd = xstrdup(cmd);
39 args_size = (2 + extra_args) * sizeof(char *);
40 f->argv = xmalloc(args_size);
41 memset(f->argv, 0, args_size);
42 f->argv[0] = f->cmd;
43 return f;
44}
45
46static void process_cached_repolist(const char *path);
47
48void repo_config(struct cgit_repo *repo, const char *name, const char *value)
49{
50 if (!strcmp(name, "name"))
51 repo->name = xstrdup(value);
52 else if (!strcmp(name, "clone-url"))
53 repo->clone_url = xstrdup(value);
54 else if (!strcmp(name, "desc"))
55 repo->desc = xstrdup(value);
56 else if (!strcmp(name, "owner"))
57 repo->owner = xstrdup(value);
58 else if (!strcmp(name, "defbranch"))
59 repo->defbranch = xstrdup(value);
60 else if (!strcmp(name, "snapshots"))
61 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
62 else if (!strcmp(name, "enable-commit-graph"))
63 repo->enable_commit_graph = ctx.cfg.enable_commit_graph * atoi(value);
64 else if (!strcmp(name, "enable-log-filecount"))
65 repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
66 else if (!strcmp(name, "enable-log-linecount"))
67 repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
68 else if (!strcmp(name, "enable-remote-branches"))
69 repo->enable_remote_branches = atoi(value);
70 else if (!strcmp(name, "enable-subject-links"))
71 repo->enable_subject_links = atoi(value);
72 else if (!strcmp(name, "max-stats"))
73 repo->max_stats = cgit_find_stats_period(value, NULL);
74 else if (!strcmp(name, "module-link"))
75 repo->module_link= xstrdup(value);
76 else if (!strcmp(name, "section"))
77 repo->section = xstrdup(value);
78 else if (!strcmp(name, "readme") && value != NULL)
79 repo->readme = xstrdup(value);
80 else if (!strcmp(name, "logo") && value != NULL)
81 repo->logo = xstrdup(value);
82 else if (!strcmp(name, "logo-link") && value != NULL)
83 repo->logo_link = xstrdup(value);
84 else if (ctx.cfg.enable_filter_overrides) {
85 if (!strcmp(name, "about-filter"))
86 repo->about_filter = new_filter(value, 0);
87 else if (!strcmp(name, "commit-filter"))
88 repo->commit_filter = new_filter(value, 0);
89 else if (!strcmp(name, "source-filter"))
90 repo->source_filter = new_filter(value, 1);
91 }
92}
93
94void config_cb(const char *name, const char *value)
95{
96 if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
97 ctx.cfg.section = xstrdup(value);
98 else if (!strcmp(name, "repo.url"))
99 ctx.repo = cgit_add_repo(value);
100 else if (ctx.repo && !strcmp(name, "repo.path"))
101 ctx.repo->path = trim_end(value, '/');
102 else if (ctx.repo && !prefixcmp(name, "repo."))
103 repo_config(ctx.repo, name + 5, value);
104 else if (!strcmp(name, "readme"))
105 ctx.cfg.readme = xstrdup(value);
106 else if (!strcmp(name, "root-title"))
107 ctx.cfg.root_title = xstrdup(value);
108 else if (!strcmp(name, "root-desc"))
109 ctx.cfg.root_desc = xstrdup(value);
110 else if (!strcmp(name, "root-readme"))
111 ctx.cfg.root_readme = xstrdup(value);
112 else if (!strcmp(name, "css"))
113 ctx.cfg.css = xstrdup(value);
114 else if (!strcmp(name, "favicon"))
115 ctx.cfg.favicon = xstrdup(value);
116 else if (!strcmp(name, "footer"))
117 ctx.cfg.footer = xstrdup(value);
118 else if (!strcmp(name, "head-include"))
119 ctx.cfg.head_include = xstrdup(value);
120 else if (!strcmp(name, "header"))
121 ctx.cfg.header = xstrdup(value);
122 else if (!strcmp(name, "logo"))
123 ctx.cfg.logo = xstrdup(value);
124 else if (!strcmp(name, "index-header"))
125 ctx.cfg.index_header = xstrdup(value);
126 else if (!strcmp(name, "index-info"))
127 ctx.cfg.index_info = xstrdup(value);
128 else if (!strcmp(name, "logo-link"))
129 ctx.cfg.logo_link = xstrdup(value);
130 else if (!strcmp(name, "module-link"))
131 ctx.cfg.module_link = xstrdup(value);
132 else if (!strcmp(name, "strict-export"))
133 ctx.cfg.strict_export = xstrdup(value);
134 else if (!strcmp(name, "virtual-root")) {
135 ctx.cfg.virtual_root = trim_end(value, '/');
136 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
137 ctx.cfg.virtual_root = "";
138 } else if (!strcmp(name, "nocache"))
139 ctx.cfg.nocache = atoi(value);
140 else if (!strcmp(name, "noplainemail"))
141 ctx.cfg.noplainemail = atoi(value);
142 else if (!strcmp(name, "noheader"))
143 ctx.cfg.noheader = atoi(value);
144 else if (!strcmp(name, "snapshots"))
145 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
146 else if (!strcmp(name, "enable-filter-overrides"))
147 ctx.cfg.enable_filter_overrides = atoi(value);
148 else if (!strcmp(name, "enable-gitweb-owner"))
149 ctx.cfg.enable_gitweb_owner = atoi(value);
150 else if (!strcmp(name, "enable-index-links"))
151 ctx.cfg.enable_index_links = atoi(value);
152 else if (!strcmp(name, "enable-commit-graph"))
153 ctx.cfg.enable_commit_graph = atoi(value);
154 else if (!strcmp(name, "enable-log-filecount"))
155 ctx.cfg.enable_log_filecount = atoi(value);
156 else if (!strcmp(name, "enable-log-linecount"))
157 ctx.cfg.enable_log_linecount = atoi(value);
158 else if (!strcmp(name, "enable-remote-branches"))
159 ctx.cfg.enable_remote_branches = atoi(value);
160 else if (!strcmp(name, "enable-subject-links"))
161 ctx.cfg.enable_subject_links = atoi(value);
162 else if (!strcmp(name, "enable-tree-linenumbers"))
163 ctx.cfg.enable_tree_linenumbers = atoi(value);
164 else if (!strcmp(name, "max-stats"))
165 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
166 else if (!strcmp(name, "cache-size"))
167 ctx.cfg.cache_size = atoi(value);
168 else if (!strcmp(name, "cache-root"))
169 ctx.cfg.cache_root = xstrdup(expand_macros(value));
170 else if (!strcmp(name, "cache-root-ttl"))
171 ctx.cfg.cache_root_ttl = atoi(value);
172 else if (!strcmp(name, "cache-repo-ttl"))
173 ctx.cfg.cache_repo_ttl = atoi(value);
174 else if (!strcmp(name, "cache-scanrc-ttl"))
175 ctx.cfg.cache_scanrc_ttl = atoi(value);
176 else if (!strcmp(name, "cache-static-ttl"))
177 ctx.cfg.cache_static_ttl = atoi(value);
178 else if (!strcmp(name, "cache-dynamic-ttl"))
179 ctx.cfg.cache_dynamic_ttl = atoi(value);
180 else if (!strcmp(name, "about-filter"))
181 ctx.cfg.about_filter = new_filter(value, 0);
182 else if (!strcmp(name, "commit-filter"))
183 ctx.cfg.commit_filter = new_filter(value, 0);
184 else if (!strcmp(name, "embedded"))
185 ctx.cfg.embedded = atoi(value);
186 else if (!strcmp(name, "max-atom-items"))
187 ctx.cfg.max_atom_items = atoi(value);
188 else if (!strcmp(name, "max-message-length"))
189 ctx.cfg.max_msg_len = atoi(value);
190 else if (!strcmp(name, "max-repodesc-length"))
191 ctx.cfg.max_repodesc_len = atoi(value);
192 else if (!strcmp(name, "max-blob-size"))
193 ctx.cfg.max_blob_size = atoi(value);
194 else if (!strcmp(name, "max-repo-count"))
195 ctx.cfg.max_repo_count = atoi(value);
196 else if (!strcmp(name, "max-commit-count"))
197 ctx.cfg.max_commit_count = atoi(value);
198 else if (!strcmp(name, "project-list"))
199 ctx.cfg.project_list = xstrdup(expand_macros(value));
200 else if (!strcmp(name, "scan-path"))
201 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
202 process_cached_repolist(expand_macros(value));
203 else if (ctx.cfg.project_list)
204 scan_projects(expand_macros(value),
205 ctx.cfg.project_list, repo_config);
206 else
207 scan_tree(expand_macros(value), repo_config);
208 else if (!strcmp(name, "scan-hidden-path"))
209 ctx.cfg.scan_hidden_path = atoi(value);
210 else if (!strcmp(name, "section-from-path"))
211 ctx.cfg.section_from_path = atoi(value);
212 else if (!strcmp(name, "source-filter"))
213 ctx.cfg.source_filter = new_filter(value, 1);
214 else if (!strcmp(name, "summary-log"))
215 ctx.cfg.summary_log = atoi(value);
216 else if (!strcmp(name, "summary-branches"))
217 ctx.cfg.summary_branches = atoi(value);
218 else if (!strcmp(name, "summary-tags"))
219 ctx.cfg.summary_tags = atoi(value);
220 else if (!strcmp(name, "side-by-side-diffs"))
221 ctx.cfg.ssdiff = atoi(value);
222 else if (!strcmp(name, "agefile"))
223 ctx.cfg.agefile = xstrdup(value);
224 else if (!strcmp(name, "renamelimit"))
225 ctx.cfg.renamelimit = atoi(value);
226 else if (!strcmp(name, "remove-suffix"))
227 ctx.cfg.remove_suffix = atoi(value);
228 else if (!strcmp(name, "robots"))
229 ctx.cfg.robots = xstrdup(value);
230 else if (!strcmp(name, "clone-prefix"))
231 ctx.cfg.clone_prefix = xstrdup(value);
232 else if (!strcmp(name, "local-time"))
233 ctx.cfg.local_time = atoi(value);
234 else if (!prefixcmp(name, "mimetype."))
235 add_mimetype(name + 9, value);
236 else if (!strcmp(name, "include"))
237 parse_configfile(expand_macros(value), config_cb);
238}
239
240static void querystring_cb(const char *name, const char *value)
241{
242 if (!value)
243 value = "";
244
245 if (!strcmp(name,"r")) {
246 ctx.qry.repo = xstrdup(value);
247 ctx.repo = cgit_get_repoinfo(value);
248 } else if (!strcmp(name, "p")) {
249 ctx.qry.page = xstrdup(value);
250 } else if (!strcmp(name, "url")) {
251 if (*value == '/')
252 value++;
253 ctx.qry.url = xstrdup(value);
254 cgit_parse_url(value);
255 } else if (!strcmp(name, "qt")) {
256 ctx.qry.grep = xstrdup(value);
257 } else if (!strcmp(name, "q")) {
258 ctx.qry.search = xstrdup(value);
259 } else if (!strcmp(name, "h")) {
260 ctx.qry.head = xstrdup(value);
261 ctx.qry.has_symref = 1;
262 } else if (!strcmp(name, "id")) {
263 ctx.qry.sha1 = xstrdup(value);
264 ctx.qry.has_sha1 = 1;
265 } else if (!strcmp(name, "id2")) {
266 ctx.qry.sha2 = xstrdup(value);
267 ctx.qry.has_sha1 = 1;
268 } else if (!strcmp(name, "ofs")) {
269 ctx.qry.ofs = atoi(value);
270 } else if (!strcmp(name, "path")) {
271 ctx.qry.path = trim_end(value, '/');
272 } else if (!strcmp(name, "name")) {
273 ctx.qry.name = xstrdup(value);
274 } else if (!strcmp(name, "mimetype")) {
275 ctx.qry.mimetype = xstrdup(value);
276 } else if (!strcmp(name, "s")){
277 ctx.qry.sort = xstrdup(value);
278 } else if (!strcmp(name, "showmsg")) {
279 ctx.qry.showmsg = atoi(value);
280 } else if (!strcmp(name, "period")) {
281 ctx.qry.period = xstrdup(value);
282 } else if (!strcmp(name, "ss")) {
283 ctx.qry.ssdiff = atoi(value);
284 } else if (!strcmp(name, "all")) {
285 ctx.qry.show_all = atoi(value);
286 } else if (!strcmp(name, "context")) {
287 ctx.qry.context = atoi(value);
288 } else if (!strcmp(name, "ignorews")) {
289 ctx.qry.ignorews = atoi(value);
290 }
291}
292
293char *xstrdupn(const char *str)
294{
295 return (str ? xstrdup(str) : NULL);
296}
297
298static void prepare_context(struct cgit_context *ctx)
299{
300 memset(ctx, 0, sizeof(*ctx));
301 ctx->cfg.agefile = "info/web/last-modified";
302 ctx->cfg.nocache = 0;
303 ctx->cfg.cache_size = 0;
304 ctx->cfg.cache_dynamic_ttl = 5;
305 ctx->cfg.cache_max_create_time = 5;
306 ctx->cfg.cache_repo_ttl = 5;
307 ctx->cfg.cache_root = CGIT_CACHE_ROOT;
308 ctx->cfg.cache_root_ttl = 5;
309 ctx->cfg.cache_scanrc_ttl = 15;
310 ctx->cfg.cache_static_ttl = -1;
311 ctx->cfg.css = "/cgit.css";
312 ctx->cfg.logo = "/cgit.png";
313 ctx->cfg.local_time = 0;
314 ctx->cfg.enable_gitweb_owner = 1;
315 ctx->cfg.enable_tree_linenumbers = 1;
316 ctx->cfg.max_repo_count = 50;
317 ctx->cfg.max_commit_count = 50;
318 ctx->cfg.max_lock_attempts = 5;
319 ctx->cfg.max_msg_len = 80;
320 ctx->cfg.max_repodesc_len = 80;
321 ctx->cfg.max_blob_size = 0;
322 ctx->cfg.max_stats = 0;
323 ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
324 ctx->cfg.project_list = NULL;
325 ctx->cfg.renamelimit = -1;
326 ctx->cfg.remove_suffix = 0;
327 ctx->cfg.robots = "index, nofollow";
328 ctx->cfg.root_title = "Git repository browser";
329 ctx->cfg.root_desc = "a fast webinterface for the git dscm";
330 ctx->cfg.scan_hidden_path = 0;
331 ctx->cfg.script_name = CGIT_SCRIPT_NAME;
332 ctx->cfg.section = "";
333 ctx->cfg.summary_branches = 10;
334 ctx->cfg.summary_log = 10;
335 ctx->cfg.summary_tags = 10;
336 ctx->cfg.max_atom_items = 10;
337 ctx->cfg.ssdiff = 0;
338 ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
339 ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
340 ctx->env.https = xstrdupn(getenv("HTTPS"));
341 ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
342 ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
343 ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
344 ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
345 ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
346 ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
347 ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
348 ctx->page.mimetype = "text/html";
349 ctx->page.charset = PAGE_ENCODING;
350 ctx->page.filename = NULL;
351 ctx->page.size = 0;
352 ctx->page.modified = time(NULL);
353 ctx->page.expires = ctx->page.modified;
354 ctx->page.etag = NULL;
355 memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
356 if (ctx->env.script_name)
357 ctx->cfg.script_name = ctx->env.script_name;
358 if (ctx->env.query_string)
359 ctx->qry.raw = ctx->env.query_string;
360 if (!ctx->env.cgit_config)
361 ctx->env.cgit_config = CGIT_CONFIG;
362}
363
364struct refmatch {
365 char *req_ref;
366 char *first_ref;
367 int match;
368};
369
370int find_current_ref(const char *refname, const unsigned char *sha1,
371 int flags, void *cb_data)
372{
373 struct refmatch *info;
374
375 info = (struct refmatch *)cb_data;
376 if (!strcmp(refname, info->req_ref))
377 info->match = 1;
378 if (!info->first_ref)
379 info->first_ref = xstrdup(refname);
380 return info->match;
381}
382
383char *find_default_branch(struct cgit_repo *repo)
384{
385 struct refmatch info;
386 char *ref;
387
388 info.req_ref = repo->defbranch;
389 info.first_ref = NULL;
390 info.match = 0;
391 for_each_branch_ref(find_current_ref, &info);
392 if (info.match)
393 ref = info.req_ref;
394 else
395 ref = info.first_ref;
396 if (ref)
397 ref = xstrdup(ref);
398 return ref;
399}
400
401static int prepare_repo_cmd(struct cgit_context *ctx)
402{
403 char *tmp;
404 unsigned char sha1[20];
405 int nongit = 0;
406
407 setenv("GIT_DIR", ctx->repo->path, 1);
408 setup_git_directory_gently(&nongit);
409 if (nongit) {
410 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
411 "config error");
412 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
413 ctx->repo = NULL;
414 cgit_print_http_headers(ctx);
415 cgit_print_docstart(ctx);
416 cgit_print_pageheader(ctx);
417 cgit_print_error(tmp);
418 cgit_print_docend();
419 return 1;
420 }
421 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
422
423 if (!ctx->qry.head) {
424 ctx->qry.nohead = 1;
425 ctx->qry.head = find_default_branch(ctx->repo);
426 ctx->repo->defbranch = ctx->qry.head;
427 }
428
429 if (!ctx->qry.head) {
430 cgit_print_http_headers(ctx);
431 cgit_print_docstart(ctx);
432 cgit_print_pageheader(ctx);
433 cgit_print_error("Repository seems to be empty");
434 cgit_print_docend();
435 return 1;
436 }
437
438 if (get_sha1(ctx->qry.head, sha1)) {
439 tmp = xstrdup(ctx->qry.head);
440 ctx->qry.head = ctx->repo->defbranch;
441 ctx->page.status = 404;
442 ctx->page.statusmsg = "not found";
443 cgit_print_http_headers(ctx);
444 cgit_print_docstart(ctx);
445 cgit_print_pageheader(ctx);
446 cgit_print_error(fmt("Invalid branch: %s", tmp));
447 cgit_print_docend();
448 return 1;
449 }
450 return 0;
451}
452
453static void process_request(void *cbdata)
454{
455 struct cgit_context *ctx = cbdata;
456 struct cgit_cmd *cmd;
457
458 cmd = cgit_get_cmd(ctx);
459 if (!cmd) {
460 ctx->page.title = "cgit error";
461 cgit_print_http_headers(ctx);
462 cgit_print_docstart(ctx);
463 cgit_print_pageheader(ctx);
464 cgit_print_error("Invalid request");
465 cgit_print_docend();
466 return;
467 }
468
469 /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
470 * in-project path limit to be made available at ctx->qry.vpath.
471 * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
472 */
473 ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
474
475 if (cmd->want_repo && !ctx->repo) {
476 cgit_print_http_headers(ctx);
477 cgit_print_docstart(ctx);
478 cgit_print_pageheader(ctx);
479 cgit_print_error(fmt("No repository selected"));
480 cgit_print_docend();
481 return;
482 }
483
484 if (ctx->repo && prepare_repo_cmd(ctx))
485 return;
486
487 if (cmd->want_layout) {
488 cgit_print_http_headers(ctx);
489 cgit_print_docstart(ctx);
490 cgit_print_pageheader(ctx);
491 }
492
493 cmd->fn(ctx);
494
495 if (cmd->want_layout)
496 cgit_print_docend();
497}
498
499int cmp_repos(const void *a, const void *b)
500{
501 const struct cgit_repo *ra = a, *rb = b;
502 return strcmp(ra->url, rb->url);
503}
504
505char *build_snapshot_setting(int bitmap)
506{
507 const struct cgit_snapshot_format *f;
508 char *result = xstrdup("");
509 char *tmp;
510 int len;
511
512 for (f = cgit_snapshot_formats; f->suffix; f++) {
513 if (f->bit & bitmap) {
514 tmp = result;
515 result = xstrdup(fmt("%s%s ", tmp, f->suffix));
516 free(tmp);
517 }
518 }
519 len = strlen(result);
520 if (len)
521 result[len - 1] = '\0';
522 return result;
523}
524
525char *get_first_line(char *txt)
526{
527 char *t = xstrdup(txt);
528 char *p = strchr(t, '\n');
529 if (p)
530 *p = '\0';
531 return t;
532}
533
534void print_repo(FILE *f, struct cgit_repo *repo)
535{
536 fprintf(f, "repo.url=%s\n", repo->url);
537 fprintf(f, "repo.name=%s\n", repo->name);
538 fprintf(f, "repo.path=%s\n", repo->path);
539 if (repo->owner)
540 fprintf(f, "repo.owner=%s\n", repo->owner);
541 if (repo->desc) {
542 char *tmp = get_first_line(repo->desc);
543 fprintf(f, "repo.desc=%s\n", tmp);
544 free(tmp);
545 }
546 if (repo->readme)
547 fprintf(f, "repo.readme=%s\n", repo->readme);
548 if (repo->defbranch)
549 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
550 if (repo->module_link)
551 fprintf(f, "repo.module-link=%s\n", repo->module_link);
552 if (repo->section)
553 fprintf(f, "repo.section=%s\n", repo->section);
554 if (repo->clone_url)
555 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
556 fprintf(f, "repo.enable-commit-graph=%d\n",
557 repo->enable_commit_graph);
558 fprintf(f, "repo.enable-log-filecount=%d\n",
559 repo->enable_log_filecount);
560 fprintf(f, "repo.enable-log-linecount=%d\n",
561 repo->enable_log_linecount);
562 if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
563 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
564 if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
565 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
566 if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
567 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
568 if (repo->snapshots != ctx.cfg.snapshots) {
569 char *tmp = build_snapshot_setting(repo->snapshots);
570 fprintf(f, "repo.snapshots=%s\n", tmp);
571 free(tmp);
572 }
573 if (repo->max_stats != ctx.cfg.max_stats)
574 fprintf(f, "repo.max-stats=%s\n",
575 cgit_find_stats_periodname(repo->max_stats));
576 fprintf(f, "\n");
577}
578
579void print_repolist(FILE *f, struct cgit_repolist *list, int start)
580{
581 int i;
582
583 for(i = start; i < list->count; i++)
584 print_repo(f, &list->repos[i]);
585}
586
587/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
588 * and return 0 on success.
589 */
590static int generate_cached_repolist(const char *path, const char *cached_rc)
591{
592 char *locked_rc;
593 int idx;
594 FILE *f;
595
596 locked_rc = xstrdup(fmt("%s.lock", cached_rc));
597 f = fopen(locked_rc, "wx");
598 if (!f) {
599 /* Inform about the error unless the lockfile already existed,
600 * since that only means we've got concurrent requests.
601 */
602 if (errno != EEXIST)
603 fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
604 locked_rc, strerror(errno), errno);
605 return errno;
606 }
607 idx = cgit_repolist.count;
608 if (ctx.cfg.project_list)
609 scan_projects(path, ctx.cfg.project_list, repo_config);
610 else
611 scan_tree(path, repo_config);
612 print_repolist(f, &cgit_repolist, idx);
613 if (rename(locked_rc, cached_rc))
614 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
615 locked_rc, cached_rc, strerror(errno), errno);
616 fclose(f);
617 return 0;
618}
619
620static void process_cached_repolist(const char *path)
621{
622 struct stat st;
623 char *cached_rc;
624 time_t age;
625 unsigned long hash;
626
627 hash = hash_str(path);
628 if (ctx.cfg.project_list)
629 hash += hash_str(ctx.cfg.project_list);
630 cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
631
632 if (stat(cached_rc, &st)) {
633 /* Nothing is cached, we need to scan without forking. And
634 * if we fail to generate a cached repolist, we need to
635 * invoke scan_tree manually.
636 */
637 if (generate_cached_repolist(path, cached_rc)) {
638 if (ctx.cfg.project_list)
639 scan_projects(path, ctx.cfg.project_list,
640 repo_config);
641 else
642 scan_tree(path, repo_config);
643 }
644 return;
645 }
646
647 parse_configfile(cached_rc, config_cb);
648
649 /* If the cached configfile hasn't expired, lets exit now */
650 age = time(NULL) - st.st_mtime;
651 if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
652 return;
653
654 /* The cached repolist has been parsed, but it was old. So lets
655 * rescan the specified path and generate a new cached repolist
656 * in a child-process to avoid latency for the current request.
657 */
658 if (fork())
659 return;
660
661 exit(generate_cached_repolist(path, cached_rc));
662}
663
664static void cgit_parse_args(int argc, const char **argv)
665{
666 int i;
667 int scan = 0;
668
669 for (i = 1; i < argc; i++) {
670 if (!strncmp(argv[i], "--cache=", 8)) {
671 ctx.cfg.cache_root = xstrdup(argv[i]+8);
672 }
673 if (!strcmp(argv[i], "--nocache")) {
674 ctx.cfg.nocache = 1;
675 }
676 if (!strcmp(argv[i], "--nohttp")) {
677 ctx.env.no_http = "1";
678 }
679 if (!strncmp(argv[i], "--query=", 8)) {
680 ctx.qry.raw = xstrdup(argv[i]+8);
681 }
682 if (!strncmp(argv[i], "--repo=", 7)) {
683 ctx.qry.repo = xstrdup(argv[i]+7);
684 }
685 if (!strncmp(argv[i], "--page=", 7)) {
686 ctx.qry.page = xstrdup(argv[i]+7);
687 }
688 if (!strncmp(argv[i], "--head=", 7)) {
689 ctx.qry.head = xstrdup(argv[i]+7);
690 ctx.qry.has_symref = 1;
691 }
692 if (!strncmp(argv[i], "--sha1=", 7)) {
693 ctx.qry.sha1 = xstrdup(argv[i]+7);
694 ctx.qry.has_sha1 = 1;
695 }
696 if (!strncmp(argv[i], "--ofs=", 6)) {
697 ctx.qry.ofs = atoi(argv[i]+6);
698 }
699 if (!strncmp(argv[i], "--scan-tree=", 12) ||
700 !strncmp(argv[i], "--scan-path=", 12)) {
701 /* HACK: the global snapshot bitmask defines the
702 * set of allowed snapshot formats, but the config
703 * file hasn't been parsed yet so the mask is
704 * currently 0. By setting all bits high before
705 * scanning we make sure that any in-repo cgitrc
706 * snapshot setting is respected by scan_tree().
707 * BTW: we assume that there'll never be more than
708 * 255 different snapshot formats supported by cgit...
709 */
710 ctx.cfg.snapshots = 0xFF;
711 scan++;
712 scan_tree(argv[i] + 12, repo_config);
713 }
714 }
715 if (scan) {
716 qsort(cgit_repolist.repos, cgit_repolist.count,
717 sizeof(struct cgit_repo), cmp_repos);
718 print_repolist(stdout, &cgit_repolist, 0);
719 exit(0);
720 }
721}
722
723static int calc_ttl()
724{
725 if (!ctx.repo)
726 return ctx.cfg.cache_root_ttl;
727
728 if (!ctx.qry.page)
729 return ctx.cfg.cache_repo_ttl;
730
731 if (ctx.qry.has_symref)
732 return ctx.cfg.cache_dynamic_ttl;
733
734 if (ctx.qry.has_sha1)
735 return ctx.cfg.cache_static_ttl;
736
737 return ctx.cfg.cache_repo_ttl;
738}
739
740int main(int argc, const char **argv)
741{
742 const char *path;
743 char *qry;
744 int err, ttl;
745
746 prepare_context(&ctx);
747 cgit_repolist.length = 0;
748 cgit_repolist.count = 0;
749 cgit_repolist.repos = NULL;
750
751 cgit_parse_args(argc, argv);
752 parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
753 ctx.repo = NULL;
754 http_parse_querystring(ctx.qry.raw, querystring_cb);
755
756 /* If virtual-root isn't specified in cgitrc, lets pretend
757 * that virtual-root equals SCRIPT_NAME, minus any possibly
758 * trailing slashes.
759 */
760 if (!ctx.cfg.virtual_root)
761 ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
762
763 /* If no url parameter is specified on the querystring, lets
764 * use PATH_INFO as url. This allows cgit to work with virtual
765 * urls without the need for rewriterules in the webserver (as
766 * long as PATH_INFO is included in the cache lookup key).
767 */
768 path = ctx.env.path_info;
769 if (!ctx.qry.url && path) {
770 if (path[0] == '/')
771 path++;
772 ctx.qry.url = xstrdup(path);
773 if (ctx.qry.raw) {
774 qry = ctx.qry.raw;
775 ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
776 free(qry);
777 } else
778 ctx.qry.raw = xstrdup(ctx.qry.url);
779 cgit_parse_url(ctx.qry.url);
780 }
781
782 ttl = calc_ttl();
783 ctx.page.expires += ttl*60;
784 if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
785 ctx.cfg.nocache = 1;
786 if (ctx.cfg.nocache)
787 ctx.cfg.cache_size = 0;
788 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
789 ctx.qry.raw, ttl, process_request, &ctx);
790 if (err)
791 cgit_print_error(fmt("Error processing page: %s (%d)",
792 strerror(err), err));
793 return err;
794}