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