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 ctx.qry.has_ssdiff = 1;
285 } else if (!strcmp(name, "all")) {
286 ctx.qry.show_all = atoi(value);
287 } else if (!strcmp(name, "context")) {
288 ctx.qry.context = atoi(value);
289 } else if (!strcmp(name, "ignorews")) {
290 ctx.qry.ignorews = atoi(value);
291 }
292}
293
294char *xstrdupn(const char *str)
295{
296 return (str ? xstrdup(str) : NULL);
297}
298
299static void prepare_context(struct cgit_context *ctx)
300{
301 memset(ctx, 0, sizeof(*ctx));
302 ctx->cfg.agefile = "info/web/last-modified";
303 ctx->cfg.nocache = 0;
304 ctx->cfg.cache_size = 0;
305 ctx->cfg.cache_dynamic_ttl = 5;
306 ctx->cfg.cache_max_create_time = 5;
307 ctx->cfg.cache_repo_ttl = 5;
308 ctx->cfg.cache_root = CGIT_CACHE_ROOT;
309 ctx->cfg.cache_root_ttl = 5;
310 ctx->cfg.cache_scanrc_ttl = 15;
311 ctx->cfg.cache_static_ttl = -1;
312 ctx->cfg.css = "/cgit.css";
313 ctx->cfg.logo = "/cgit.png";
314 ctx->cfg.local_time = 0;
315 ctx->cfg.enable_gitweb_owner = 1;
316 ctx->cfg.enable_tree_linenumbers = 1;
317 ctx->cfg.max_repo_count = 50;
318 ctx->cfg.max_commit_count = 50;
319 ctx->cfg.max_lock_attempts = 5;
320 ctx->cfg.max_msg_len = 80;
321 ctx->cfg.max_repodesc_len = 80;
322 ctx->cfg.max_blob_size = 0;
323 ctx->cfg.max_stats = 0;
324 ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
325 ctx->cfg.project_list = NULL;
326 ctx->cfg.renamelimit = -1;
327 ctx->cfg.remove_suffix = 0;
328 ctx->cfg.robots = "index, nofollow";
329 ctx->cfg.root_title = "Git repository browser";
330 ctx->cfg.root_desc = "a fast webinterface for the git dscm";
331 ctx->cfg.scan_hidden_path = 0;
332 ctx->cfg.script_name = CGIT_SCRIPT_NAME;
333 ctx->cfg.section = "";
334 ctx->cfg.summary_branches = 10;
335 ctx->cfg.summary_log = 10;
336 ctx->cfg.summary_tags = 10;
337 ctx->cfg.max_atom_items = 10;
338 ctx->cfg.ssdiff = 0;
339 ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
340 ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
341 ctx->env.https = xstrdupn(getenv("HTTPS"));
342 ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
343 ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
344 ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
345 ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
346 ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
347 ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
348 ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
349 ctx->page.mimetype = "text/html";
350 ctx->page.charset = PAGE_ENCODING;
351 ctx->page.filename = NULL;
352 ctx->page.size = 0;
353 ctx->page.modified = time(NULL);
354 ctx->page.expires = ctx->page.modified;
355 ctx->page.etag = NULL;
356 memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
357 if (ctx->env.script_name)
358 ctx->cfg.script_name = ctx->env.script_name;
359 if (ctx->env.query_string)
360 ctx->qry.raw = ctx->env.query_string;
361 if (!ctx->env.cgit_config)
362 ctx->env.cgit_config = CGIT_CONFIG;
363}
364
365struct refmatch {
366 char *req_ref;
367 char *first_ref;
368 int match;
369};
370
371int find_current_ref(const char *refname, const unsigned char *sha1,
372 int flags, void *cb_data)
373{
374 struct refmatch *info;
375
376 info = (struct refmatch *)cb_data;
377 if (!strcmp(refname, info->req_ref))
378 info->match = 1;
379 if (!info->first_ref)
380 info->first_ref = xstrdup(refname);
381 return info->match;
382}
383
384char *find_default_branch(struct cgit_repo *repo)
385{
386 struct refmatch info;
387 char *ref;
388
389 info.req_ref = repo->defbranch;
390 info.first_ref = NULL;
391 info.match = 0;
392 for_each_branch_ref(find_current_ref, &info);
393 if (info.match)
394 ref = info.req_ref;
395 else
396 ref = info.first_ref;
397 if (ref)
398 ref = xstrdup(ref);
399 return ref;
400}
401
402static int prepare_repo_cmd(struct cgit_context *ctx)
403{
404 char *tmp;
405 unsigned char sha1[20];
406 int nongit = 0;
407 int rc;
408
409 setenv("GIT_DIR", ctx->repo->path, 1);
410 setup_git_directory_gently(&nongit);
411 if (nongit) {
412 rc = errno;
413 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
414 "config error");
415 tmp = fmt("Failed to open %s: %s",
416 ctx->repo->name,
417 rc ? strerror(rc) : "Not a valid git repository");
418 ctx->repo = NULL;
419 cgit_print_http_headers(ctx);
420 cgit_print_docstart(ctx);
421 cgit_print_pageheader(ctx);
422 cgit_print_error(tmp);
423 cgit_print_docend();
424 return 1;
425 }
426 ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
427
428 if (!ctx->qry.head) {
429 ctx->qry.nohead = 1;
430 ctx->qry.head = find_default_branch(ctx->repo);
431 ctx->repo->defbranch = ctx->qry.head;
432 }
433
434 if (!ctx->qry.head) {
435 cgit_print_http_headers(ctx);
436 cgit_print_docstart(ctx);
437 cgit_print_pageheader(ctx);
438 cgit_print_error("Repository seems to be empty");
439 cgit_print_docend();
440 return 1;
441 }
442
443 if (get_sha1(ctx->qry.head, sha1)) {
444 tmp = xstrdup(ctx->qry.head);
445 ctx->qry.head = ctx->repo->defbranch;
446 ctx->page.status = 404;
447 ctx->page.statusmsg = "not found";
448 cgit_print_http_headers(ctx);
449 cgit_print_docstart(ctx);
450 cgit_print_pageheader(ctx);
451 cgit_print_error(fmt("Invalid branch: %s", tmp));
452 cgit_print_docend();
453 return 1;
454 }
455 return 0;
456}
457
458static void process_request(void *cbdata)
459{
460 struct cgit_context *ctx = cbdata;
461 struct cgit_cmd *cmd;
462
463 cmd = cgit_get_cmd(ctx);
464 if (!cmd) {
465 ctx->page.title = "cgit error";
466 cgit_print_http_headers(ctx);
467 cgit_print_docstart(ctx);
468 cgit_print_pageheader(ctx);
469 cgit_print_error("Invalid request");
470 cgit_print_docend();
471 return;
472 }
473
474 /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
475 * in-project path limit to be made available at ctx->qry.vpath.
476 * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
477 */
478 ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
479
480 if (cmd->want_repo && !ctx->repo) {
481 cgit_print_http_headers(ctx);
482 cgit_print_docstart(ctx);
483 cgit_print_pageheader(ctx);
484 cgit_print_error(fmt("No repository selected"));
485 cgit_print_docend();
486 return;
487 }
488
489 if (ctx->repo && prepare_repo_cmd(ctx))
490 return;
491
492 if (cmd->want_layout) {
493 cgit_print_http_headers(ctx);
494 cgit_print_docstart(ctx);
495 cgit_print_pageheader(ctx);
496 }
497
498 cmd->fn(ctx);
499
500 if (cmd->want_layout)
501 cgit_print_docend();
502}
503
504int cmp_repos(const void *a, const void *b)
505{
506 const struct cgit_repo *ra = a, *rb = b;
507 return strcmp(ra->url, rb->url);
508}
509
510char *build_snapshot_setting(int bitmap)
511{
512 const struct cgit_snapshot_format *f;
513 char *result = xstrdup("");
514 char *tmp;
515 int len;
516
517 for (f = cgit_snapshot_formats; f->suffix; f++) {
518 if (f->bit & bitmap) {
519 tmp = result;
520 result = xstrdup(fmt("%s%s ", tmp, f->suffix));
521 free(tmp);
522 }
523 }
524 len = strlen(result);
525 if (len)
526 result[len - 1] = '\0';
527 return result;
528}
529
530char *get_first_line(char *txt)
531{
532 char *t = xstrdup(txt);
533 char *p = strchr(t, '\n');
534 if (p)
535 *p = '\0';
536 return t;
537}
538
539void print_repo(FILE *f, struct cgit_repo *repo)
540{
541 fprintf(f, "repo.url=%s\n", repo->url);
542 fprintf(f, "repo.name=%s\n", repo->name);
543 fprintf(f, "repo.path=%s\n", repo->path);
544 if (repo->owner)
545 fprintf(f, "repo.owner=%s\n", repo->owner);
546 if (repo->desc) {
547 char *tmp = get_first_line(repo->desc);
548 fprintf(f, "repo.desc=%s\n", tmp);
549 free(tmp);
550 }
551 if (repo->readme)
552 fprintf(f, "repo.readme=%s\n", repo->readme);
553 if (repo->defbranch)
554 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
555 if (repo->module_link)
556 fprintf(f, "repo.module-link=%s\n", repo->module_link);
557 if (repo->section)
558 fprintf(f, "repo.section=%s\n", repo->section);
559 if (repo->clone_url)
560 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
561 fprintf(f, "repo.enable-commit-graph=%d\n",
562 repo->enable_commit_graph);
563 fprintf(f, "repo.enable-log-filecount=%d\n",
564 repo->enable_log_filecount);
565 fprintf(f, "repo.enable-log-linecount=%d\n",
566 repo->enable_log_linecount);
567 if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
568 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
569 if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
570 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
571 if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
572 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
573 if (repo->snapshots != ctx.cfg.snapshots) {
574 char *tmp = build_snapshot_setting(repo->snapshots);
575 fprintf(f, "repo.snapshots=%s\n", tmp);
576 free(tmp);
577 }
578 if (repo->max_stats != ctx.cfg.max_stats)
579 fprintf(f, "repo.max-stats=%s\n",
580 cgit_find_stats_periodname(repo->max_stats));
581 fprintf(f, "\n");
582}
583
584void print_repolist(FILE *f, struct cgit_repolist *list, int start)
585{
586 int i;
587
588 for(i = start; i < list->count; i++)
589 print_repo(f, &list->repos[i]);
590}
591
592/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
593 * and return 0 on success.
594 */
595static int generate_cached_repolist(const char *path, const char *cached_rc)
596{
597 char *locked_rc;
598 int idx;
599 FILE *f;
600
601 locked_rc = xstrdup(fmt("%s.lock", cached_rc));
602 f = fopen(locked_rc, "wx");
603 if (!f) {
604 /* Inform about the error unless the lockfile already existed,
605 * since that only means we've got concurrent requests.
606 */
607 if (errno != EEXIST)
608 fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
609 locked_rc, strerror(errno), errno);
610 return errno;
611 }
612 idx = cgit_repolist.count;
613 if (ctx.cfg.project_list)
614 scan_projects(path, ctx.cfg.project_list, repo_config);
615 else
616 scan_tree(path, repo_config);
617 print_repolist(f, &cgit_repolist, idx);
618 if (rename(locked_rc, cached_rc))
619 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
620 locked_rc, cached_rc, strerror(errno), errno);
621 fclose(f);
622 return 0;
623}
624
625static void process_cached_repolist(const char *path)
626{
627 struct stat st;
628 char *cached_rc;
629 time_t age;
630 unsigned long hash;
631
632 hash = hash_str(path);
633 if (ctx.cfg.project_list)
634 hash += hash_str(ctx.cfg.project_list);
635 cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
636
637 if (stat(cached_rc, &st)) {
638 /* Nothing is cached, we need to scan without forking. And
639 * if we fail to generate a cached repolist, we need to
640 * invoke scan_tree manually.
641 */
642 if (generate_cached_repolist(path, cached_rc)) {
643 if (ctx.cfg.project_list)
644 scan_projects(path, ctx.cfg.project_list,
645 repo_config);
646 else
647 scan_tree(path, repo_config);
648 }
649 return;
650 }
651
652 parse_configfile(cached_rc, config_cb);
653
654 /* If the cached configfile hasn't expired, lets exit now */
655 age = time(NULL) - st.st_mtime;
656 if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
657 return;
658
659 /* The cached repolist has been parsed, but it was old. So lets
660 * rescan the specified path and generate a new cached repolist
661 * in a child-process to avoid latency for the current request.
662 */
663 if (fork())
664 return;
665
666 exit(generate_cached_repolist(path, cached_rc));
667}
668
669static void cgit_parse_args(int argc, const char **argv)
670{
671 int i;
672 int scan = 0;
673
674 for (i = 1; i < argc; i++) {
675 if (!strncmp(argv[i], "--cache=", 8)) {
676 ctx.cfg.cache_root = xstrdup(argv[i]+8);
677 }
678 if (!strcmp(argv[i], "--nocache")) {
679 ctx.cfg.nocache = 1;
680 }
681 if (!strcmp(argv[i], "--nohttp")) {
682 ctx.env.no_http = "1";
683 }
684 if (!strncmp(argv[i], "--query=", 8)) {
685 ctx.qry.raw = xstrdup(argv[i]+8);
686 }
687 if (!strncmp(argv[i], "--repo=", 7)) {
688 ctx.qry.repo = xstrdup(argv[i]+7);
689 }
690 if (!strncmp(argv[i], "--page=", 7)) {
691 ctx.qry.page = xstrdup(argv[i]+7);
692 }
693 if (!strncmp(argv[i], "--head=", 7)) {
694 ctx.qry.head = xstrdup(argv[i]+7);
695 ctx.qry.has_symref = 1;
696 }
697 if (!strncmp(argv[i], "--sha1=", 7)) {
698 ctx.qry.sha1 = xstrdup(argv[i]+7);
699 ctx.qry.has_sha1 = 1;
700 }
701 if (!strncmp(argv[i], "--ofs=", 6)) {
702 ctx.qry.ofs = atoi(argv[i]+6);
703 }
704 if (!strncmp(argv[i], "--scan-tree=", 12) ||
705 !strncmp(argv[i], "--scan-path=", 12)) {
706 /* HACK: the global snapshot bitmask defines the
707 * set of allowed snapshot formats, but the config
708 * file hasn't been parsed yet so the mask is
709 * currently 0. By setting all bits high before
710 * scanning we make sure that any in-repo cgitrc
711 * snapshot setting is respected by scan_tree().
712 * BTW: we assume that there'll never be more than
713 * 255 different snapshot formats supported by cgit...
714 */
715 ctx.cfg.snapshots = 0xFF;
716 scan++;
717 scan_tree(argv[i] + 12, repo_config);
718 }
719 }
720 if (scan) {
721 qsort(cgit_repolist.repos, cgit_repolist.count,
722 sizeof(struct cgit_repo), cmp_repos);
723 print_repolist(stdout, &cgit_repolist, 0);
724 exit(0);
725 }
726}
727
728static int calc_ttl()
729{
730 if (!ctx.repo)
731 return ctx.cfg.cache_root_ttl;
732
733 if (!ctx.qry.page)
734 return ctx.cfg.cache_repo_ttl;
735
736 if (ctx.qry.has_symref)
737 return ctx.cfg.cache_dynamic_ttl;
738
739 if (ctx.qry.has_sha1)
740 return ctx.cfg.cache_static_ttl;
741
742 return ctx.cfg.cache_repo_ttl;
743}
744
745int main(int argc, const char **argv)
746{
747 const char *path;
748 char *qry;
749 int err, ttl;
750
751 prepare_context(&ctx);
752 cgit_repolist.length = 0;
753 cgit_repolist.count = 0;
754 cgit_repolist.repos = NULL;
755
756 cgit_parse_args(argc, argv);
757 parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
758 ctx.repo = NULL;
759 http_parse_querystring(ctx.qry.raw, querystring_cb);
760
761 /* If virtual-root isn't specified in cgitrc, lets pretend
762 * that virtual-root equals SCRIPT_NAME, minus any possibly
763 * trailing slashes.
764 */
765 if (!ctx.cfg.virtual_root && ctx.cfg.script_name) {
766 ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
767 if (!ctx.cfg.virtual_root)
768 ctx.cfg.virtual_root = "";
769 }
770
771 /* If no url parameter is specified on the querystring, lets
772 * use PATH_INFO as url. This allows cgit to work with virtual
773 * urls without the need for rewriterules in the webserver (as
774 * long as PATH_INFO is included in the cache lookup key).
775 */
776 path = ctx.env.path_info;
777 if (!ctx.qry.url && path) {
778 if (path[0] == '/')
779 path++;
780 ctx.qry.url = xstrdup(path);
781 if (ctx.qry.raw) {
782 qry = ctx.qry.raw;
783 ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
784 free(qry);
785 } else
786 ctx.qry.raw = xstrdup(ctx.qry.url);
787 cgit_parse_url(ctx.qry.url);
788 }
789
790 ttl = calc_ttl();
791 ctx.page.expires += ttl*60;
792 if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
793 ctx.cfg.nocache = 1;
794 if (ctx.cfg.nocache)
795 ctx.cfg.cache_size = 0;
796 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
797 ctx.qry.raw, ttl, process_request, &ctx);
798 if (err)
799 cgit_print_error(fmt("Error processing page: %s (%d)",
800 strerror(err), err));
801 return err;
802}