cgit.c (view raw)
1/* cgit.c: cgi for the git scm
2 *
3 * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
4 *
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
7 */
8
9#include "cgit.h"
10#include "cache.h"
11#include "cmd.h"
12#include "configfile.h"
13#include "html.h"
14#include "ui-shared.h"
15#include "ui-stats.h"
16#include "ui-blob.h"
17#include "ui-summary.h"
18#include "scan-tree.h"
19
20const char *cgit_version = CGIT_VERSION;
21
22static void add_mimetype(const char *name, const char *value)
23{
24 struct string_list_item *item;
25
26 item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
27 item->util = xstrdup(value);
28}
29
30static void process_cached_repolist(const char *path);
31
32static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
33{
34 struct string_list_item *item;
35
36 if (!strcmp(name, "name"))
37 repo->name = xstrdup(value);
38 else if (!strcmp(name, "clone-url"))
39 repo->clone_url = xstrdup(value);
40 else if (!strcmp(name, "desc"))
41 repo->desc = xstrdup(value);
42 else if (!strcmp(name, "owner"))
43 repo->owner = xstrdup(value);
44 else if (!strcmp(name, "defbranch"))
45 repo->defbranch = xstrdup(value);
46 else if (!strcmp(name, "snapshots"))
47 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
48 else if (!strcmp(name, "enable-commit-graph"))
49 repo->enable_commit_graph = atoi(value);
50 else if (!strcmp(name, "enable-log-filecount"))
51 repo->enable_log_filecount = atoi(value);
52 else if (!strcmp(name, "enable-log-linecount"))
53 repo->enable_log_linecount = atoi(value);
54 else if (!strcmp(name, "enable-remote-branches"))
55 repo->enable_remote_branches = atoi(value);
56 else if (!strcmp(name, "enable-subject-links"))
57 repo->enable_subject_links = atoi(value);
58 else if (!strcmp(name, "branch-sort")) {
59 if (!strcmp(value, "age"))
60 repo->branch_sort = 1;
61 if (!strcmp(value, "name"))
62 repo->branch_sort = 0;
63 } else if (!strcmp(name, "commit-sort")) {
64 if (!strcmp(value, "date"))
65 repo->commit_sort = 1;
66 if (!strcmp(value, "topo"))
67 repo->commit_sort = 2;
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 (starts_with(name, "module-link.")) {
73 item = string_list_append(&repo->submodules, xstrdup(name + 12));
74 item->util = xstrdup(value);
75 } else if (!strcmp(name, "section"))
76 repo->section = xstrdup(value);
77 else if (!strcmp(name, "readme") && value != NULL) {
78 if (repo->readme.items == ctx.cfg.readme.items)
79 memset(&repo->readme, 0, sizeof(repo->readme));
80 string_list_append(&repo->readme, xstrdup(value));
81 } else if (!strcmp(name, "logo") && value != NULL)
82 repo->logo = xstrdup(value);
83 else if (!strcmp(name, "logo-link") && value != NULL)
84 repo->logo_link = xstrdup(value);
85 else if (ctx.cfg.enable_filter_overrides) {
86 if (!strcmp(name, "about-filter"))
87 repo->about_filter = cgit_new_filter(value, ABOUT);
88 else if (!strcmp(name, "commit-filter"))
89 repo->commit_filter = cgit_new_filter(value, COMMIT);
90 else if (!strcmp(name, "source-filter"))
91 repo->source_filter = cgit_new_filter(value, SOURCE);
92 else if (!strcmp(name, "email-filter"))
93 repo->email_filter = cgit_new_filter(value, EMAIL);
94 }
95}
96
97static void config_cb(const char *name, const char *value)
98{
99 if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
100 ctx.cfg.section = xstrdup(value);
101 else if (!strcmp(name, "repo.url"))
102 ctx.repo = cgit_add_repo(value);
103 else if (ctx.repo && !strcmp(name, "repo.path"))
104 ctx.repo->path = trim_end(value, '/');
105 else if (ctx.repo && starts_with(name, "repo."))
106 repo_config(ctx.repo, name + 5, value);
107 else if (!strcmp(name, "readme") && value != NULL)
108 string_list_append(&ctx.cfg.readme, xstrdup(value));
109 else if (!strcmp(name, "root-title"))
110 ctx.cfg.root_title = xstrdup(value);
111 else if (!strcmp(name, "root-desc"))
112 ctx.cfg.root_desc = xstrdup(value);
113 else if (!strcmp(name, "root-readme"))
114 ctx.cfg.root_readme = xstrdup(value);
115 else if (!strcmp(name, "css"))
116 ctx.cfg.css = xstrdup(value);
117 else if (!strcmp(name, "favicon"))
118 ctx.cfg.favicon = xstrdup(value);
119 else if (!strcmp(name, "footer"))
120 ctx.cfg.footer = xstrdup(value);
121 else if (!strcmp(name, "head-include"))
122 ctx.cfg.head_include = xstrdup(value);
123 else if (!strcmp(name, "header"))
124 ctx.cfg.header = xstrdup(value);
125 else if (!strcmp(name, "logo"))
126 ctx.cfg.logo = xstrdup(value);
127 else if (!strcmp(name, "index-header"))
128 ctx.cfg.index_header = xstrdup(value);
129 else if (!strcmp(name, "index-info"))
130 ctx.cfg.index_info = xstrdup(value);
131 else if (!strcmp(name, "logo-link"))
132 ctx.cfg.logo_link = xstrdup(value);
133 else if (!strcmp(name, "module-link"))
134 ctx.cfg.module_link = xstrdup(value);
135 else if (!strcmp(name, "strict-export"))
136 ctx.cfg.strict_export = xstrdup(value);
137 else if (!strcmp(name, "virtual-root")) {
138 ctx.cfg.virtual_root = ensure_end(value, '/');
139 } else if (!strcmp(name, "nocache"))
140 ctx.cfg.nocache = atoi(value);
141 else if (!strcmp(name, "noplainemail"))
142 ctx.cfg.noplainemail = atoi(value);
143 else if (!strcmp(name, "noheader"))
144 ctx.cfg.noheader = atoi(value);
145 else if (!strcmp(name, "snapshots"))
146 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
147 else if (!strcmp(name, "enable-filter-overrides"))
148 ctx.cfg.enable_filter_overrides = atoi(value);
149 else if (!strcmp(name, "enable-http-clone"))
150 ctx.cfg.enable_http_clone = atoi(value);
151 else if (!strcmp(name, "enable-index-links"))
152 ctx.cfg.enable_index_links = atoi(value);
153 else if (!strcmp(name, "enable-index-owner"))
154 ctx.cfg.enable_index_owner = atoi(value);
155 else if (!strcmp(name, "enable-commit-graph"))
156 ctx.cfg.enable_commit_graph = atoi(value);
157 else if (!strcmp(name, "enable-log-filecount"))
158 ctx.cfg.enable_log_filecount = atoi(value);
159 else if (!strcmp(name, "enable-log-linecount"))
160 ctx.cfg.enable_log_linecount = atoi(value);
161 else if (!strcmp(name, "enable-remote-branches"))
162 ctx.cfg.enable_remote_branches = atoi(value);
163 else if (!strcmp(name, "enable-subject-links"))
164 ctx.cfg.enable_subject_links = atoi(value);
165 else if (!strcmp(name, "enable-tree-linenumbers"))
166 ctx.cfg.enable_tree_linenumbers = atoi(value);
167 else if (!strcmp(name, "enable-git-config"))
168 ctx.cfg.enable_git_config = atoi(value);
169 else if (!strcmp(name, "max-stats"))
170 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
171 else if (!strcmp(name, "cache-size"))
172 ctx.cfg.cache_size = atoi(value);
173 else if (!strcmp(name, "cache-root"))
174 ctx.cfg.cache_root = xstrdup(expand_macros(value));
175 else if (!strcmp(name, "cache-root-ttl"))
176 ctx.cfg.cache_root_ttl = atoi(value);
177 else if (!strcmp(name, "cache-repo-ttl"))
178 ctx.cfg.cache_repo_ttl = atoi(value);
179 else if (!strcmp(name, "cache-scanrc-ttl"))
180 ctx.cfg.cache_scanrc_ttl = atoi(value);
181 else if (!strcmp(name, "cache-static-ttl"))
182 ctx.cfg.cache_static_ttl = atoi(value);
183 else if (!strcmp(name, "cache-dynamic-ttl"))
184 ctx.cfg.cache_dynamic_ttl = atoi(value);
185 else if (!strcmp(name, "cache-about-ttl"))
186 ctx.cfg.cache_about_ttl = atoi(value);
187 else if (!strcmp(name, "cache-snapshot-ttl"))
188 ctx.cfg.cache_snapshot_ttl = atoi(value);
189 else if (!strcmp(name, "case-sensitive-sort"))
190 ctx.cfg.case_sensitive_sort = atoi(value);
191 else if (!strcmp(name, "about-filter"))
192 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
193 else if (!strcmp(name, "commit-filter"))
194 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
195 else if (!strcmp(name, "email-filter"))
196 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
197 else if (!strcmp(name, "auth-filter"))
198 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
199 else if (!strcmp(name, "embedded"))
200 ctx.cfg.embedded = atoi(value);
201 else if (!strcmp(name, "max-atom-items"))
202 ctx.cfg.max_atom_items = atoi(value);
203 else if (!strcmp(name, "max-message-length"))
204 ctx.cfg.max_msg_len = atoi(value);
205 else if (!strcmp(name, "max-repodesc-length"))
206 ctx.cfg.max_repodesc_len = atoi(value);
207 else if (!strcmp(name, "max-blob-size"))
208 ctx.cfg.max_blob_size = atoi(value);
209 else if (!strcmp(name, "max-repo-count"))
210 ctx.cfg.max_repo_count = atoi(value);
211 else if (!strcmp(name, "max-commit-count"))
212 ctx.cfg.max_commit_count = atoi(value);
213 else if (!strcmp(name, "project-list"))
214 ctx.cfg.project_list = xstrdup(expand_macros(value));
215 else if (!strcmp(name, "scan-path"))
216 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
217 process_cached_repolist(expand_macros(value));
218 else if (ctx.cfg.project_list)
219 scan_projects(expand_macros(value),
220 ctx.cfg.project_list, repo_config);
221 else
222 scan_tree(expand_macros(value), repo_config);
223 else if (!strcmp(name, "scan-hidden-path"))
224 ctx.cfg.scan_hidden_path = atoi(value);
225 else if (!strcmp(name, "section-from-path"))
226 ctx.cfg.section_from_path = atoi(value);
227 else if (!strcmp(name, "repository-sort"))
228 ctx.cfg.repository_sort = xstrdup(value);
229 else if (!strcmp(name, "section-sort"))
230 ctx.cfg.section_sort = atoi(value);
231 else if (!strcmp(name, "source-filter"))
232 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
233 else if (!strcmp(name, "summary-log"))
234 ctx.cfg.summary_log = atoi(value);
235 else if (!strcmp(name, "summary-branches"))
236 ctx.cfg.summary_branches = atoi(value);
237 else if (!strcmp(name, "summary-tags"))
238 ctx.cfg.summary_tags = atoi(value);
239 else if (!strcmp(name, "side-by-side-diffs"))
240 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
241 else if (!strcmp(name, "agefile"))
242 ctx.cfg.agefile = xstrdup(value);
243 else if (!strcmp(name, "mimetype-file"))
244 ctx.cfg.mimetype_file = xstrdup(value);
245 else if (!strcmp(name, "renamelimit"))
246 ctx.cfg.renamelimit = atoi(value);
247 else if (!strcmp(name, "remove-suffix"))
248 ctx.cfg.remove_suffix = atoi(value);
249 else if (!strcmp(name, "robots"))
250 ctx.cfg.robots = xstrdup(value);
251 else if (!strcmp(name, "clone-prefix"))
252 ctx.cfg.clone_prefix = xstrdup(value);
253 else if (!strcmp(name, "clone-url"))
254 ctx.cfg.clone_url = xstrdup(value);
255 else if (!strcmp(name, "local-time"))
256 ctx.cfg.local_time = atoi(value);
257 else if (!strcmp(name, "commit-sort")) {
258 if (!strcmp(value, "date"))
259 ctx.cfg.commit_sort = 1;
260 if (!strcmp(value, "topo"))
261 ctx.cfg.commit_sort = 2;
262 } else if (!strcmp(name, "branch-sort")) {
263 if (!strcmp(value, "age"))
264 ctx.cfg.branch_sort = 1;
265 if (!strcmp(value, "name"))
266 ctx.cfg.branch_sort = 0;
267 } else if (starts_with(name, "mimetype."))
268 add_mimetype(name + 9, value);
269 else if (!strcmp(name, "include"))
270 parse_configfile(expand_macros(value), config_cb);
271}
272
273static void querystring_cb(const char *name, const char *value)
274{
275 if (!value)
276 value = "";
277
278 if (!strcmp(name,"r")) {
279 ctx.qry.repo = xstrdup(value);
280 ctx.repo = cgit_get_repoinfo(value);
281 } else if (!strcmp(name, "p")) {
282 ctx.qry.page = xstrdup(value);
283 } else if (!strcmp(name, "url")) {
284 if (*value == '/')
285 value++;
286 ctx.qry.url = xstrdup(value);
287 cgit_parse_url(value);
288 } else if (!strcmp(name, "qt")) {
289 ctx.qry.grep = xstrdup(value);
290 } else if (!strcmp(name, "q")) {
291 ctx.qry.search = xstrdup(value);
292 } else if (!strcmp(name, "h")) {
293 ctx.qry.head = xstrdup(value);
294 ctx.qry.has_symref = 1;
295 } else if (!strcmp(name, "id")) {
296 ctx.qry.sha1 = xstrdup(value);
297 ctx.qry.has_sha1 = 1;
298 } else if (!strcmp(name, "id2")) {
299 ctx.qry.sha2 = xstrdup(value);
300 ctx.qry.has_sha1 = 1;
301 } else if (!strcmp(name, "ofs")) {
302 ctx.qry.ofs = atoi(value);
303 } else if (!strcmp(name, "path")) {
304 ctx.qry.path = trim_end(value, '/');
305 } else if (!strcmp(name, "name")) {
306 ctx.qry.name = xstrdup(value);
307 } else if (!strcmp(name, "mimetype")) {
308 ctx.qry.mimetype = xstrdup(value);
309 } else if (!strcmp(name, "s")) {
310 ctx.qry.sort = xstrdup(value);
311 } else if (!strcmp(name, "showmsg")) {
312 ctx.qry.showmsg = atoi(value);
313 } else if (!strcmp(name, "period")) {
314 ctx.qry.period = xstrdup(value);
315 } else if (!strcmp(name, "dt")) {
316 ctx.qry.difftype = atoi(value);
317 ctx.qry.has_difftype = 1;
318 } else if (!strcmp(name, "ss")) {
319 /* No longer generated, but there may be links out there. */
320 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
321 ctx.qry.has_difftype = 1;
322 } else if (!strcmp(name, "all")) {
323 ctx.qry.show_all = atoi(value);
324 } else if (!strcmp(name, "context")) {
325 ctx.qry.context = atoi(value);
326 } else if (!strcmp(name, "ignorews")) {
327 ctx.qry.ignorews = atoi(value);
328 }
329}
330
331static void prepare_context(void)
332{
333 memset(&ctx, 0, sizeof(ctx));
334 ctx.cfg.agefile = "info/web/last-modified";
335 ctx.cfg.nocache = 0;
336 ctx.cfg.cache_size = 0;
337 ctx.cfg.cache_max_create_time = 5;
338 ctx.cfg.cache_root = CGIT_CACHE_ROOT;
339 ctx.cfg.cache_about_ttl = 15;
340 ctx.cfg.cache_snapshot_ttl = 5;
341 ctx.cfg.cache_repo_ttl = 5;
342 ctx.cfg.cache_root_ttl = 5;
343 ctx.cfg.cache_scanrc_ttl = 15;
344 ctx.cfg.cache_dynamic_ttl = 5;
345 ctx.cfg.cache_static_ttl = -1;
346 ctx.cfg.case_sensitive_sort = 1;
347 ctx.cfg.branch_sort = 0;
348 ctx.cfg.commit_sort = 0;
349 ctx.cfg.css = "/cgit.css";
350 ctx.cfg.logo = "/cgit.png";
351 ctx.cfg.favicon = "/favicon.ico";
352 ctx.cfg.local_time = 0;
353 ctx.cfg.enable_http_clone = 1;
354 ctx.cfg.enable_index_owner = 1;
355 ctx.cfg.enable_tree_linenumbers = 1;
356 ctx.cfg.enable_git_config = 0;
357 ctx.cfg.max_repo_count = 50;
358 ctx.cfg.max_commit_count = 50;
359 ctx.cfg.max_lock_attempts = 5;
360 ctx.cfg.max_msg_len = 80;
361 ctx.cfg.max_repodesc_len = 80;
362 ctx.cfg.max_blob_size = 0;
363 ctx.cfg.max_stats = 0;
364 ctx.cfg.project_list = NULL;
365 ctx.cfg.renamelimit = -1;
366 ctx.cfg.remove_suffix = 0;
367 ctx.cfg.robots = "index, nofollow";
368 ctx.cfg.root_title = "Git repository browser";
369 ctx.cfg.root_desc = "a fast webinterface for the git dscm";
370 ctx.cfg.scan_hidden_path = 0;
371 ctx.cfg.script_name = CGIT_SCRIPT_NAME;
372 ctx.cfg.section = "";
373 ctx.cfg.repository_sort = "name";
374 ctx.cfg.section_sort = 1;
375 ctx.cfg.summary_branches = 10;
376 ctx.cfg.summary_log = 10;
377 ctx.cfg.summary_tags = 10;
378 ctx.cfg.max_atom_items = 10;
379 ctx.cfg.difftype = DIFF_UNIFIED;
380 ctx.env.cgit_config = getenv("CGIT_CONFIG");
381 ctx.env.http_host = getenv("HTTP_HOST");
382 ctx.env.https = getenv("HTTPS");
383 ctx.env.no_http = getenv("NO_HTTP");
384 ctx.env.path_info = getenv("PATH_INFO");
385 ctx.env.query_string = getenv("QUERY_STRING");
386 ctx.env.request_method = getenv("REQUEST_METHOD");
387 ctx.env.script_name = getenv("SCRIPT_NAME");
388 ctx.env.server_name = getenv("SERVER_NAME");
389 ctx.env.server_port = getenv("SERVER_PORT");
390 ctx.env.http_cookie = getenv("HTTP_COOKIE");
391 ctx.env.http_referer = getenv("HTTP_REFERER");
392 ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
393 ctx.env.authenticated = 0;
394 ctx.page.mimetype = "text/html";
395 ctx.page.charset = PAGE_ENCODING;
396 ctx.page.filename = NULL;
397 ctx.page.size = 0;
398 ctx.page.modified = time(NULL);
399 ctx.page.expires = ctx.page.modified;
400 ctx.page.etag = NULL;
401 memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
402 if (ctx.env.script_name)
403 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
404 if (ctx.env.query_string)
405 ctx.qry.raw = xstrdup(ctx.env.query_string);
406 if (!ctx.env.cgit_config)
407 ctx.env.cgit_config = CGIT_CONFIG;
408}
409
410struct refmatch {
411 char *req_ref;
412 char *first_ref;
413 int match;
414};
415
416static int find_current_ref(const char *refname, const unsigned char *sha1,
417 int flags, void *cb_data)
418{
419 struct refmatch *info;
420
421 info = (struct refmatch *)cb_data;
422 if (!strcmp(refname, info->req_ref))
423 info->match = 1;
424 if (!info->first_ref)
425 info->first_ref = xstrdup(refname);
426 return info->match;
427}
428
429static void free_refmatch_inner(struct refmatch *info)
430{
431 if (info->first_ref)
432 free(info->first_ref);
433}
434
435static char *find_default_branch(struct cgit_repo *repo)
436{
437 struct refmatch info;
438 char *ref;
439
440 info.req_ref = repo->defbranch;
441 info.first_ref = NULL;
442 info.match = 0;
443 for_each_branch_ref(find_current_ref, &info);
444 if (info.match)
445 ref = info.req_ref;
446 else
447 ref = info.first_ref;
448 if (ref)
449 ref = xstrdup(ref);
450 free_refmatch_inner(&info);
451
452 return ref;
453}
454
455static char *guess_defbranch(void)
456{
457 const char *ref;
458 unsigned char sha1[20];
459
460 ref = resolve_ref_unsafe("HEAD", 0, sha1, NULL);
461 if (!ref || !starts_with(ref, "refs/heads/"))
462 return "master";
463 return xstrdup(ref + 11);
464}
465/* The caller must free filename and ref after calling this. */
466static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
467{
468 const char *colon;
469
470 *filename = NULL;
471 *ref = NULL;
472
473 if (!readme || !readme[0])
474 return;
475
476 /* Check if the readme is tracked in the git repo. */
477 colon = strchr(readme, ':');
478 if (colon && strlen(colon) > 1) {
479 /* If it starts with a colon, we want to use
480 * the default branch */
481 if (colon == readme && repo->defbranch)
482 *ref = xstrdup(repo->defbranch);
483 else
484 *ref = xstrndup(readme, colon - readme);
485 readme = colon + 1;
486 }
487
488 /* Prepend repo path to relative readme path unless tracked. */
489 if (!(*ref) && readme[0] != '/')
490 *filename = fmtalloc("%s/%s", repo->path, readme);
491 else
492 *filename = xstrdup(readme);
493}
494static void choose_readme(struct cgit_repo *repo)
495{
496 int found;
497 char *filename, *ref;
498 struct string_list_item *entry;
499
500 if (!repo->readme.nr)
501 return;
502
503 found = 0;
504 for_each_string_list_item(entry, &repo->readme) {
505 parse_readme(entry->string, &filename, &ref, repo);
506 if (!filename) {
507 free(filename);
508 free(ref);
509 continue;
510 }
511 if (ref) {
512 if (cgit_ref_path_exists(filename, ref, 1)) {
513 found = 1;
514 break;
515 }
516 }
517 else if (!access(filename, R_OK)) {
518 found = 1;
519 break;
520 }
521 free(filename);
522 free(ref);
523 }
524 repo->readme.strdup_strings = 1;
525 string_list_clear(&repo->readme, 0);
526 repo->readme.strdup_strings = 0;
527 if (found)
528 string_list_append(&repo->readme, filename)->util = ref;
529}
530
531static int prepare_repo_cmd(void)
532{
533 unsigned char sha1[20];
534 int nongit = 0;
535 int rc;
536
537 /* The path to the git repository. */
538 setenv("GIT_DIR", ctx.repo->path, 1);
539
540 /* Do not look in /etc/ for gitconfig and gitattributes. */
541 setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
542 setenv("GIT_ATTR_NOSYSTEM", "1", 1);
543 unsetenv("HOME");
544 unsetenv("XDG_CONFIG_HOME");
545
546 /* Setup the git directory and initialize the notes system. Both of these
547 * load local configuration from the git repository, so we do them both while
548 * the HOME variables are unset. */
549 setup_git_directory_gently(&nongit);
550 init_display_notes(NULL);
551
552 if (nongit) {
553 const char *name = ctx.repo->name;
554 rc = errno;
555 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
556 "config error");
557 ctx.repo = NULL;
558 cgit_print_http_headers();
559 cgit_print_docstart();
560 cgit_print_pageheader();
561 cgit_print_error("Failed to open %s: %s", name,
562 rc ? strerror(rc) : "Not a valid git repository");
563 cgit_print_docend();
564 return 1;
565 }
566 ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
567
568 if (!ctx.repo->defbranch)
569 ctx.repo->defbranch = guess_defbranch();
570
571 if (!ctx.qry.head) {
572 ctx.qry.nohead = 1;
573 ctx.qry.head = find_default_branch(ctx.repo);
574 }
575
576 if (!ctx.qry.head) {
577 cgit_print_http_headers();
578 cgit_print_docstart();
579 cgit_print_pageheader();
580 cgit_print_error("Repository seems to be empty");
581 cgit_print_docend();
582 return 1;
583 }
584
585 if (get_sha1(ctx.qry.head, sha1)) {
586 char *tmp = xstrdup(ctx.qry.head);
587 ctx.qry.head = ctx.repo->defbranch;
588 ctx.page.status = 404;
589 ctx.page.statusmsg = "Not found";
590 cgit_print_http_headers();
591 cgit_print_docstart();
592 cgit_print_pageheader();
593 cgit_print_error("Invalid branch: %s", tmp);
594 cgit_print_docend();
595 free(tmp);
596 return 1;
597 }
598 sort_string_list(&ctx.repo->submodules);
599 cgit_prepare_repo_env(ctx.repo);
600 choose_readme(ctx.repo);
601 return 0;
602}
603
604static inline void open_auth_filter(const char *function)
605{
606 cgit_open_filter(ctx.cfg.auth_filter, function,
607 ctx.env.http_cookie ? ctx.env.http_cookie : "",
608 ctx.env.request_method ? ctx.env.request_method : "",
609 ctx.env.query_string ? ctx.env.query_string : "",
610 ctx.env.http_referer ? ctx.env.http_referer : "",
611 ctx.env.path_info ? ctx.env.path_info : "",
612 ctx.env.http_host ? ctx.env.http_host : "",
613 ctx.env.https ? ctx.env.https : "",
614 ctx.qry.repo ? ctx.qry.repo : "",
615 ctx.qry.page ? ctx.qry.page : "",
616 ctx.qry.url ? ctx.qry.url : "",
617 cgit_loginurl());
618}
619
620/* We intentionally keep this rather small, instead of looping and
621 * feeding it to the filter a couple bytes at a time. This way, the
622 * filter itself does not need to handle any denial of service or
623 * buffer bloat issues. If this winds up being too small, people
624 * will complain on the mailing list, and we'll increase it as needed. */
625#define MAX_AUTHENTICATION_POST_BYTES 4096
626/* The filter is expected to spit out "Status: " and all headers. */
627static inline void authenticate_post(void)
628{
629 char buffer[MAX_AUTHENTICATION_POST_BYTES];
630 int len;
631
632 open_auth_filter("authenticate-post");
633 len = ctx.env.content_length;
634 if (len > MAX_AUTHENTICATION_POST_BYTES)
635 len = MAX_AUTHENTICATION_POST_BYTES;
636 if (read(STDIN_FILENO, buffer, len) < 0)
637 die_errno("Could not read POST from stdin");
638 if (write(STDOUT_FILENO, buffer, len) < 0)
639 die_errno("Could not write POST to stdout");
640 cgit_close_filter(ctx.cfg.auth_filter);
641 exit(0);
642}
643
644static inline void authenticate_cookie(void)
645{
646 /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
647 if (!ctx.cfg.auth_filter) {
648 ctx.env.authenticated = 1;
649 return;
650 }
651
652 /* If we're having something POST'd to /login, we're authenticating POST,
653 * instead of the cookie, so call authenticate_post and bail out early.
654 * This pattern here should match /?p=login with POST. */
655 if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
656 !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
657 authenticate_post();
658 return;
659 }
660
661 /* If we've made it this far, we're authenticating the cookie for real, so do that. */
662 open_auth_filter("authenticate-cookie");
663 ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
664}
665
666static void process_request(void)
667{
668 struct cgit_cmd *cmd;
669
670 /* If we're not yet authenticated, no matter what page we're on,
671 * display the authentication body from the auth_filter. This should
672 * never be cached. */
673 if (!ctx.env.authenticated) {
674 ctx.page.title = "Authentication Required";
675 cgit_print_http_headers();
676 cgit_print_docstart();
677 cgit_print_pageheader();
678 open_auth_filter("body");
679 cgit_close_filter(ctx.cfg.auth_filter);
680 cgit_print_docend();
681 return;
682 }
683
684 cmd = cgit_get_cmd();
685 if (!cmd) {
686 ctx.page.title = "cgit error";
687 ctx.page.status = 404;
688 ctx.page.statusmsg = "Not found";
689 cgit_print_http_headers();
690 cgit_print_docstart();
691 cgit_print_pageheader();
692 cgit_print_error("Invalid request");
693 cgit_print_docend();
694 return;
695 }
696
697 if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
698 html_status(404, "Not found", 0);
699 return;
700 }
701
702 /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
703 * in-project path limit to be made available at ctx.qry.vpath.
704 * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
705 */
706 ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
707
708 if (cmd->want_repo && !ctx.repo) {
709 cgit_print_http_headers();
710 cgit_print_docstart();
711 cgit_print_pageheader();
712 cgit_print_error("No repository selected");
713 cgit_print_docend();
714 return;
715 }
716
717 if (ctx.repo && prepare_repo_cmd())
718 return;
719
720 if (cmd->want_layout) {
721 cgit_print_http_headers();
722 cgit_print_docstart();
723 cgit_print_pageheader();
724 }
725
726 cmd->fn();
727
728 if (cmd->want_layout)
729 cgit_print_docend();
730}
731
732static int cmp_repos(const void *a, const void *b)
733{
734 const struct cgit_repo *ra = a, *rb = b;
735 return strcmp(ra->url, rb->url);
736}
737
738static char *build_snapshot_setting(int bitmap)
739{
740 const struct cgit_snapshot_format *f;
741 struct strbuf result = STRBUF_INIT;
742
743 for (f = cgit_snapshot_formats; f->suffix; f++) {
744 if (f->bit & bitmap) {
745 if (result.len)
746 strbuf_addch(&result, ' ');
747 strbuf_addstr(&result, f->suffix);
748 }
749 }
750 return strbuf_detach(&result, NULL);
751}
752
753static char *get_first_line(char *txt)
754{
755 char *t = xstrdup(txt);
756 char *p = strchr(t, '\n');
757 if (p)
758 *p = '\0';
759 return t;
760}
761
762static void print_repo(FILE *f, struct cgit_repo *repo)
763{
764 struct string_list_item *item;
765 fprintf(f, "repo.url=%s\n", repo->url);
766 fprintf(f, "repo.name=%s\n", repo->name);
767 fprintf(f, "repo.path=%s\n", repo->path);
768 if (repo->owner)
769 fprintf(f, "repo.owner=%s\n", repo->owner);
770 if (repo->desc) {
771 char *tmp = get_first_line(repo->desc);
772 fprintf(f, "repo.desc=%s\n", tmp);
773 free(tmp);
774 }
775 for_each_string_list_item(item, &repo->readme) {
776 if (item->util)
777 fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
778 else
779 fprintf(f, "repo.readme=%s\n", item->string);
780 }
781 if (repo->defbranch)
782 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
783 if (repo->module_link)
784 fprintf(f, "repo.module-link=%s\n", repo->module_link);
785 if (repo->section)
786 fprintf(f, "repo.section=%s\n", repo->section);
787 if (repo->clone_url)
788 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
789 fprintf(f, "repo.enable-commit-graph=%d\n",
790 repo->enable_commit_graph);
791 fprintf(f, "repo.enable-log-filecount=%d\n",
792 repo->enable_log_filecount);
793 fprintf(f, "repo.enable-log-linecount=%d\n",
794 repo->enable_log_linecount);
795 if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
796 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
797 if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
798 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
799 if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
800 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
801 if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
802 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
803 if (repo->snapshots != ctx.cfg.snapshots) {
804 char *tmp = build_snapshot_setting(repo->snapshots);
805 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
806 free(tmp);
807 }
808 if (repo->max_stats != ctx.cfg.max_stats)
809 fprintf(f, "repo.max-stats=%s\n",
810 cgit_find_stats_periodname(repo->max_stats));
811 if (repo->logo)
812 fprintf(f, "repo.logo=%s\n", repo->logo);
813 if (repo->logo_link)
814 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
815 fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
816 fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
817 if (repo->branch_sort == 1)
818 fprintf(f, "repo.branch-sort=age\n");
819 if (repo->commit_sort) {
820 if (repo->commit_sort == 1)
821 fprintf(f, "repo.commit-sort=date\n");
822 else if (repo->commit_sort == 2)
823 fprintf(f, "repo.commit-sort=topo\n");
824 }
825 fprintf(f, "\n");
826}
827
828static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
829{
830 int i;
831
832 for (i = start; i < list->count; i++)
833 print_repo(f, &list->repos[i]);
834}
835
836/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
837 * and return 0 on success.
838 */
839static int generate_cached_repolist(const char *path, const char *cached_rc)
840{
841 struct strbuf locked_rc = STRBUF_INIT;
842 int result = 0;
843 int idx;
844 FILE *f;
845
846 strbuf_addf(&locked_rc, "%s.lock", cached_rc);
847 f = fopen(locked_rc.buf, "wx");
848 if (!f) {
849 /* Inform about the error unless the lockfile already existed,
850 * since that only means we've got concurrent requests.
851 */
852 result = errno;
853 if (result != EEXIST)
854 fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
855 locked_rc.buf, strerror(result), result);
856 goto out;
857 }
858 idx = cgit_repolist.count;
859 if (ctx.cfg.project_list)
860 scan_projects(path, ctx.cfg.project_list, repo_config);
861 else
862 scan_tree(path, repo_config);
863 print_repolist(f, &cgit_repolist, idx);
864 if (rename(locked_rc.buf, cached_rc))
865 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
866 locked_rc.buf, cached_rc, strerror(errno), errno);
867 fclose(f);
868out:
869 strbuf_release(&locked_rc);
870 return result;
871}
872
873static void process_cached_repolist(const char *path)
874{
875 struct stat st;
876 struct strbuf cached_rc = STRBUF_INIT;
877 time_t age;
878 unsigned long hash;
879
880 hash = hash_str(path);
881 if (ctx.cfg.project_list)
882 hash += hash_str(ctx.cfg.project_list);
883 strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
884
885 if (stat(cached_rc.buf, &st)) {
886 /* Nothing is cached, we need to scan without forking. And
887 * if we fail to generate a cached repolist, we need to
888 * invoke scan_tree manually.
889 */
890 if (generate_cached_repolist(path, cached_rc.buf)) {
891 if (ctx.cfg.project_list)
892 scan_projects(path, ctx.cfg.project_list,
893 repo_config);
894 else
895 scan_tree(path, repo_config);
896 }
897 goto out;
898 }
899
900 parse_configfile(cached_rc.buf, config_cb);
901
902 /* If the cached configfile hasn't expired, lets exit now */
903 age = time(NULL) - st.st_mtime;
904 if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
905 goto out;
906
907 /* The cached repolist has been parsed, but it was old. So lets
908 * rescan the specified path and generate a new cached repolist
909 * in a child-process to avoid latency for the current request.
910 */
911 if (fork())
912 goto out;
913
914 exit(generate_cached_repolist(path, cached_rc.buf));
915out:
916 strbuf_release(&cached_rc);
917}
918
919static void cgit_parse_args(int argc, const char **argv)
920{
921 int i;
922 int scan = 0;
923
924 for (i = 1; i < argc; i++) {
925 if (!strcmp(argv[i], "--version")) {
926 printf("CGit %s | http://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
927#ifdef NO_LUA
928 printf("[-] ");
929#else
930 printf("[+] ");
931#endif
932 printf("Lua scripting\n");
933#ifndef HAVE_LINUX_SENDFILE
934 printf("[-] ");
935#else
936 printf("[+] ");
937#endif
938 printf("Linux sendfile() usage\n");
939
940 exit(0);
941 }
942 if (starts_with(argv[i], "--cache=")) {
943 ctx.cfg.cache_root = xstrdup(argv[i] + 8);
944 } else if (!strcmp(argv[i], "--nocache")) {
945 ctx.cfg.nocache = 1;
946 } else if (!strcmp(argv[i], "--nohttp")) {
947 ctx.env.no_http = "1";
948 } else if (starts_with(argv[i], "--query=")) {
949 ctx.qry.raw = xstrdup(argv[i] + 8);
950 } else if (starts_with(argv[i], "--repo=")) {
951 ctx.qry.repo = xstrdup(argv[i] + 7);
952 } else if (starts_with(argv[i], "--page=")) {
953 ctx.qry.page = xstrdup(argv[i] + 7);
954 } else if (starts_with(argv[i], "--head=")) {
955 ctx.qry.head = xstrdup(argv[i] + 7);
956 ctx.qry.has_symref = 1;
957 } else if (starts_with(argv[i], "--sha1=")) {
958 ctx.qry.sha1 = xstrdup(argv[i] + 7);
959 ctx.qry.has_sha1 = 1;
960 } else if (starts_with(argv[i], "--ofs=")) {
961 ctx.qry.ofs = atoi(argv[i] + 6);
962 } else if (starts_with(argv[i], "--scan-tree=") ||
963 starts_with(argv[i], "--scan-path=")) {
964 /*
965 * HACK: The global snapshot bit mask defines the set
966 * of allowed snapshot formats, but the config file
967 * hasn't been parsed yet so the mask is currently 0.
968 * By setting all bits high before scanning we make
969 * sure that any in-repo cgitrc snapshot setting is
970 * respected by scan_tree().
971 *
972 * NOTE: We assume that there aren't more than 8
973 * different snapshot formats supported by cgit...
974 */
975 ctx.cfg.snapshots = 0xFF;
976 scan++;
977 scan_tree(argv[i] + 12, repo_config);
978 }
979 }
980 if (scan) {
981 qsort(cgit_repolist.repos, cgit_repolist.count,
982 sizeof(struct cgit_repo), cmp_repos);
983 print_repolist(stdout, &cgit_repolist, 0);
984 exit(0);
985 }
986}
987
988static int calc_ttl()
989{
990 if (!ctx.repo)
991 return ctx.cfg.cache_root_ttl;
992
993 if (!ctx.qry.page)
994 return ctx.cfg.cache_repo_ttl;
995
996 if (!strcmp(ctx.qry.page, "about"))
997 return ctx.cfg.cache_about_ttl;
998
999 if (!strcmp(ctx.qry.page, "snapshot"))
1000 return ctx.cfg.cache_snapshot_ttl;
1001
1002 if (ctx.qry.has_sha1)
1003 return ctx.cfg.cache_static_ttl;
1004
1005 if (ctx.qry.has_symref)
1006 return ctx.cfg.cache_dynamic_ttl;
1007
1008 return ctx.cfg.cache_repo_ttl;
1009}
1010
1011int main(int argc, const char **argv)
1012{
1013 const char *path;
1014 int err, ttl;
1015
1016 cgit_init_filters();
1017 atexit(cgit_cleanup_filters);
1018
1019 prepare_context();
1020 cgit_repolist.length = 0;
1021 cgit_repolist.count = 0;
1022 cgit_repolist.repos = NULL;
1023
1024 cgit_parse_args(argc, argv);
1025 parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1026 ctx.repo = NULL;
1027 http_parse_querystring(ctx.qry.raw, querystring_cb);
1028
1029 /* If virtual-root isn't specified in cgitrc, lets pretend
1030 * that virtual-root equals SCRIPT_NAME, minus any possibly
1031 * trailing slashes.
1032 */
1033 if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1034 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1035
1036 /* If no url parameter is specified on the querystring, lets
1037 * use PATH_INFO as url. This allows cgit to work with virtual
1038 * urls without the need for rewriterules in the webserver (as
1039 * long as PATH_INFO is included in the cache lookup key).
1040 */
1041 path = ctx.env.path_info;
1042 if (!ctx.qry.url && path) {
1043 if (path[0] == '/')
1044 path++;
1045 ctx.qry.url = xstrdup(path);
1046 if (ctx.qry.raw) {
1047 char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1048 free(ctx.qry.raw);
1049 ctx.qry.raw = newqry;
1050 } else
1051 ctx.qry.raw = xstrdup(ctx.qry.url);
1052 cgit_parse_url(ctx.qry.url);
1053 }
1054
1055 /* Before we go any further, we set ctx.env.authenticated by checking to see
1056 * if the supplied cookie is valid. All cookies are valid if there is no
1057 * auth_filter. If there is an auth_filter, the filter decides. */
1058 authenticate_cookie();
1059
1060 ttl = calc_ttl();
1061 if (ttl < 0)
1062 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1063 else
1064 ctx.page.expires += ttl * 60;
1065 if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1066 ctx.cfg.nocache = 1;
1067 if (ctx.cfg.nocache)
1068 ctx.cfg.cache_size = 0;
1069 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1070 ctx.qry.raw, ttl, process_request);
1071 cgit_cleanup_filters();
1072 if (err)
1073 cgit_print_error("Error processing page: %s (%d)",
1074 strerror(err), err);
1075 return err;
1076}