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