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, "enable-html-serving"))
59 repo->enable_html_serving = atoi(value);
60 else if (!strcmp(name, "branch-sort")) {
61 if (!strcmp(value, "age"))
62 repo->branch_sort = 1;
63 if (!strcmp(value, "name"))
64 repo->branch_sort = 0;
65 } else if (!strcmp(name, "commit-sort")) {
66 if (!strcmp(value, "date"))
67 repo->commit_sort = 1;
68 if (!strcmp(value, "topo"))
69 repo->commit_sort = 2;
70 } else if (!strcmp(name, "max-stats"))
71 repo->max_stats = cgit_find_stats_period(value, NULL);
72 else if (!strcmp(name, "module-link"))
73 repo->module_link= xstrdup(value);
74 else if (starts_with(name, "module-link.")) {
75 item = string_list_append(&repo->submodules, xstrdup(name + 12));
76 item->util = xstrdup(value);
77 } else if (!strcmp(name, "section"))
78 repo->section = xstrdup(value);
79 else if (!strcmp(name, "readme") && value != NULL) {
80 if (repo->readme.items == ctx.cfg.readme.items)
81 memset(&repo->readme, 0, sizeof(repo->readme));
82 string_list_append(&repo->readme, xstrdup(value));
83 } else if (!strcmp(name, "logo") && value != NULL)
84 repo->logo = xstrdup(value);
85 else if (!strcmp(name, "logo-link") && value != NULL)
86 repo->logo_link = xstrdup(value);
87 else if (!strcmp(name, "hide"))
88 repo->hide = atoi(value);
89 else if (!strcmp(name, "ignore"))
90 repo->ignore = atoi(value);
91 else if (ctx.cfg.enable_filter_overrides) {
92 if (!strcmp(name, "about-filter"))
93 repo->about_filter = cgit_new_filter(value, ABOUT);
94 else if (!strcmp(name, "commit-filter"))
95 repo->commit_filter = cgit_new_filter(value, COMMIT);
96 else if (!strcmp(name, "source-filter"))
97 repo->source_filter = cgit_new_filter(value, SOURCE);
98 else if (!strcmp(name, "email-filter"))
99 repo->email_filter = cgit_new_filter(value, EMAIL);
100 else if (!strcmp(name, "owner-filter"))
101 repo->owner_filter = cgit_new_filter(value, OWNER);
102 }
103}
104
105static void config_cb(const char *name, const char *value)
106{
107 if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
108 ctx.cfg.section = xstrdup(value);
109 else if (!strcmp(name, "repo.url"))
110 ctx.repo = cgit_add_repo(value);
111 else if (ctx.repo && !strcmp(name, "repo.path"))
112 ctx.repo->path = trim_end(value, '/');
113 else if (ctx.repo && starts_with(name, "repo."))
114 repo_config(ctx.repo, name + 5, value);
115 else if (!strcmp(name, "readme"))
116 string_list_append(&ctx.cfg.readme, xstrdup(value));
117 else if (!strcmp(name, "root-title"))
118 ctx.cfg.root_title = xstrdup(value);
119 else if (!strcmp(name, "root-desc"))
120 ctx.cfg.root_desc = xstrdup(value);
121 else if (!strcmp(name, "root-readme"))
122 ctx.cfg.root_readme = xstrdup(value);
123 else if (!strcmp(name, "css"))
124 ctx.cfg.css = xstrdup(value);
125 else if (!strcmp(name, "favicon"))
126 ctx.cfg.favicon = xstrdup(value);
127 else if (!strcmp(name, "footer"))
128 ctx.cfg.footer = xstrdup(value);
129 else if (!strcmp(name, "head-include"))
130 ctx.cfg.head_include = xstrdup(value);
131 else if (!strcmp(name, "header"))
132 ctx.cfg.header = xstrdup(value);
133 else if (!strcmp(name, "logo"))
134 ctx.cfg.logo = xstrdup(value);
135 else if (!strcmp(name, "index-header"))
136 ctx.cfg.index_header = xstrdup(value);
137 else if (!strcmp(name, "index-info"))
138 ctx.cfg.index_info = xstrdup(value);
139 else if (!strcmp(name, "logo-link"))
140 ctx.cfg.logo_link = xstrdup(value);
141 else if (!strcmp(name, "module-link"))
142 ctx.cfg.module_link = xstrdup(value);
143 else if (!strcmp(name, "strict-export"))
144 ctx.cfg.strict_export = xstrdup(value);
145 else if (!strcmp(name, "virtual-root")) {
146 ctx.cfg.virtual_root = ensure_end(value, '/');
147 } else if (!strcmp(name, "nocache"))
148 ctx.cfg.nocache = atoi(value);
149 else if (!strcmp(name, "noplainemail"))
150 ctx.cfg.noplainemail = atoi(value);
151 else if (!strcmp(name, "noheader"))
152 ctx.cfg.noheader = atoi(value);
153 else if (!strcmp(name, "snapshots"))
154 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
155 else if (!strcmp(name, "enable-filter-overrides"))
156 ctx.cfg.enable_filter_overrides = atoi(value);
157 else if (!strcmp(name, "enable-follow-links"))
158 ctx.cfg.enable_follow_links = atoi(value);
159 else if (!strcmp(name, "enable-http-clone"))
160 ctx.cfg.enable_http_clone = atoi(value);
161 else if (!strcmp(name, "enable-index-links"))
162 ctx.cfg.enable_index_links = atoi(value);
163 else if (!strcmp(name, "enable-index-owner"))
164 ctx.cfg.enable_index_owner = atoi(value);
165 else if (!strcmp(name, "enable-commit-graph"))
166 ctx.cfg.enable_commit_graph = atoi(value);
167 else if (!strcmp(name, "enable-log-filecount"))
168 ctx.cfg.enable_log_filecount = atoi(value);
169 else if (!strcmp(name, "enable-log-linecount"))
170 ctx.cfg.enable_log_linecount = atoi(value);
171 else if (!strcmp(name, "enable-remote-branches"))
172 ctx.cfg.enable_remote_branches = atoi(value);
173 else if (!strcmp(name, "enable-subject-links"))
174 ctx.cfg.enable_subject_links = atoi(value);
175 else if (!strcmp(name, "enable-html-serving"))
176 ctx.cfg.enable_html_serving = atoi(value);
177 else if (!strcmp(name, "enable-tree-linenumbers"))
178 ctx.cfg.enable_tree_linenumbers = atoi(value);
179 else if (!strcmp(name, "enable-git-config"))
180 ctx.cfg.enable_git_config = atoi(value);
181 else if (!strcmp(name, "max-stats"))
182 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
183 else if (!strcmp(name, "cache-size"))
184 ctx.cfg.cache_size = atoi(value);
185 else if (!strcmp(name, "cache-root"))
186 ctx.cfg.cache_root = xstrdup(expand_macros(value));
187 else if (!strcmp(name, "cache-root-ttl"))
188 ctx.cfg.cache_root_ttl = atoi(value);
189 else if (!strcmp(name, "cache-repo-ttl"))
190 ctx.cfg.cache_repo_ttl = atoi(value);
191 else if (!strcmp(name, "cache-scanrc-ttl"))
192 ctx.cfg.cache_scanrc_ttl = atoi(value);
193 else if (!strcmp(name, "cache-static-ttl"))
194 ctx.cfg.cache_static_ttl = atoi(value);
195 else if (!strcmp(name, "cache-dynamic-ttl"))
196 ctx.cfg.cache_dynamic_ttl = atoi(value);
197 else if (!strcmp(name, "cache-about-ttl"))
198 ctx.cfg.cache_about_ttl = atoi(value);
199 else if (!strcmp(name, "cache-snapshot-ttl"))
200 ctx.cfg.cache_snapshot_ttl = atoi(value);
201 else if (!strcmp(name, "case-sensitive-sort"))
202 ctx.cfg.case_sensitive_sort = atoi(value);
203 else if (!strcmp(name, "about-filter"))
204 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
205 else if (!strcmp(name, "commit-filter"))
206 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
207 else if (!strcmp(name, "email-filter"))
208 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
209 else if (!strcmp(name, "owner-filter"))
210 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
211 else if (!strcmp(name, "auth-filter"))
212 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
213 else if (!strcmp(name, "embedded"))
214 ctx.cfg.embedded = atoi(value);
215 else if (!strcmp(name, "max-atom-items"))
216 ctx.cfg.max_atom_items = atoi(value);
217 else if (!strcmp(name, "max-message-length"))
218 ctx.cfg.max_msg_len = atoi(value);
219 else if (!strcmp(name, "max-repodesc-length"))
220 ctx.cfg.max_repodesc_len = atoi(value);
221 else if (!strcmp(name, "max-blob-size"))
222 ctx.cfg.max_blob_size = atoi(value);
223 else if (!strcmp(name, "max-repo-count"))
224 ctx.cfg.max_repo_count = atoi(value);
225 else if (!strcmp(name, "max-commit-count"))
226 ctx.cfg.max_commit_count = atoi(value);
227 else if (!strcmp(name, "project-list"))
228 ctx.cfg.project_list = xstrdup(expand_macros(value));
229 else if (!strcmp(name, "scan-path"))
230 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
231 process_cached_repolist(expand_macros(value));
232 else if (ctx.cfg.project_list)
233 scan_projects(expand_macros(value),
234 ctx.cfg.project_list, repo_config);
235 else
236 scan_tree(expand_macros(value), repo_config);
237 else if (!strcmp(name, "scan-hidden-path"))
238 ctx.cfg.scan_hidden_path = atoi(value);
239 else if (!strcmp(name, "section-from-path"))
240 ctx.cfg.section_from_path = atoi(value);
241 else if (!strcmp(name, "repository-sort"))
242 ctx.cfg.repository_sort = xstrdup(value);
243 else if (!strcmp(name, "section-sort"))
244 ctx.cfg.section_sort = atoi(value);
245 else if (!strcmp(name, "source-filter"))
246 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
247 else if (!strcmp(name, "summary-log"))
248 ctx.cfg.summary_log = atoi(value);
249 else if (!strcmp(name, "summary-branches"))
250 ctx.cfg.summary_branches = atoi(value);
251 else if (!strcmp(name, "summary-tags"))
252 ctx.cfg.summary_tags = atoi(value);
253 else if (!strcmp(name, "side-by-side-diffs"))
254 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
255 else if (!strcmp(name, "agefile"))
256 ctx.cfg.agefile = xstrdup(value);
257 else if (!strcmp(name, "mimetype-file"))
258 ctx.cfg.mimetype_file = xstrdup(value);
259 else if (!strcmp(name, "renamelimit"))
260 ctx.cfg.renamelimit = atoi(value);
261 else if (!strcmp(name, "remove-suffix"))
262 ctx.cfg.remove_suffix = atoi(value);
263 else if (!strcmp(name, "robots"))
264 ctx.cfg.robots = xstrdup(value);
265 else if (!strcmp(name, "clone-prefix"))
266 ctx.cfg.clone_prefix = xstrdup(value);
267 else if (!strcmp(name, "clone-url"))
268 ctx.cfg.clone_url = xstrdup(value);
269 else if (!strcmp(name, "local-time"))
270 ctx.cfg.local_time = atoi(value);
271 else if (!strcmp(name, "commit-sort")) {
272 if (!strcmp(value, "date"))
273 ctx.cfg.commit_sort = 1;
274 if (!strcmp(value, "topo"))
275 ctx.cfg.commit_sort = 2;
276 } else if (!strcmp(name, "branch-sort")) {
277 if (!strcmp(value, "age"))
278 ctx.cfg.branch_sort = 1;
279 if (!strcmp(value, "name"))
280 ctx.cfg.branch_sort = 0;
281 } else if (starts_with(name, "mimetype."))
282 add_mimetype(name + 9, value);
283 else if (!strcmp(name, "include"))
284 parse_configfile(expand_macros(value), config_cb);
285}
286
287static void querystring_cb(const char *name, const char *value)
288{
289 if (!value)
290 value = "";
291
292 if (!strcmp(name,"r")) {
293 ctx.qry.repo = xstrdup(value);
294 ctx.repo = cgit_get_repoinfo(value);
295 } else if (!strcmp(name, "p")) {
296 ctx.qry.page = xstrdup(value);
297 } else if (!strcmp(name, "url")) {
298 if (*value == '/')
299 value++;
300 ctx.qry.url = xstrdup(value);
301 cgit_parse_url(value);
302 } else if (!strcmp(name, "qt")) {
303 ctx.qry.grep = xstrdup(value);
304 } else if (!strcmp(name, "q")) {
305 ctx.qry.search = xstrdup(value);
306 } else if (!strcmp(name, "h")) {
307 ctx.qry.head = xstrdup(value);
308 ctx.qry.has_symref = 1;
309 } else if (!strcmp(name, "id")) {
310 ctx.qry.sha1 = xstrdup(value);
311 ctx.qry.has_sha1 = 1;
312 } else if (!strcmp(name, "id2")) {
313 ctx.qry.sha2 = xstrdup(value);
314 ctx.qry.has_sha1 = 1;
315 } else if (!strcmp(name, "ofs")) {
316 ctx.qry.ofs = atoi(value);
317 } else if (!strcmp(name, "path")) {
318 ctx.qry.path = trim_end(value, '/');
319 } else if (!strcmp(name, "name")) {
320 ctx.qry.name = xstrdup(value);
321 } else if (!strcmp(name, "s")) {
322 ctx.qry.sort = xstrdup(value);
323 } else if (!strcmp(name, "showmsg")) {
324 ctx.qry.showmsg = atoi(value);
325 } else if (!strcmp(name, "period")) {
326 ctx.qry.period = xstrdup(value);
327 } else if (!strcmp(name, "dt")) {
328 ctx.qry.difftype = atoi(value);
329 ctx.qry.has_difftype = 1;
330 } else if (!strcmp(name, "ss")) {
331 /* No longer generated, but there may be links out there. */
332 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
333 ctx.qry.has_difftype = 1;
334 } else if (!strcmp(name, "all")) {
335 ctx.qry.show_all = atoi(value);
336 } else if (!strcmp(name, "context")) {
337 ctx.qry.context = atoi(value);
338 } else if (!strcmp(name, "ignorews")) {
339 ctx.qry.ignorews = atoi(value);
340 } else if (!strcmp(name, "follow")) {
341 ctx.qry.follow = atoi(value);
342 }
343}
344
345static void prepare_context(void)
346{
347 memset(&ctx, 0, sizeof(ctx));
348 ctx.cfg.agefile = "info/web/last-modified";
349 ctx.cfg.nocache = 0;
350 ctx.cfg.cache_size = 0;
351 ctx.cfg.cache_max_create_time = 5;
352 ctx.cfg.cache_root = CGIT_CACHE_ROOT;
353 ctx.cfg.cache_about_ttl = 15;
354 ctx.cfg.cache_snapshot_ttl = 5;
355 ctx.cfg.cache_repo_ttl = 5;
356 ctx.cfg.cache_root_ttl = 5;
357 ctx.cfg.cache_scanrc_ttl = 15;
358 ctx.cfg.cache_dynamic_ttl = 5;
359 ctx.cfg.cache_static_ttl = -1;
360 ctx.cfg.case_sensitive_sort = 1;
361 ctx.cfg.branch_sort = 0;
362 ctx.cfg.commit_sort = 0;
363 ctx.cfg.css = "/cgit.css";
364 ctx.cfg.logo = "/cgit.png";
365 ctx.cfg.favicon = "/favicon.ico";
366 ctx.cfg.local_time = 0;
367 ctx.cfg.enable_http_clone = 1;
368 ctx.cfg.enable_index_owner = 1;
369 ctx.cfg.enable_tree_linenumbers = 1;
370 ctx.cfg.enable_git_config = 0;
371 ctx.cfg.max_repo_count = 50;
372 ctx.cfg.max_commit_count = 50;
373 ctx.cfg.max_lock_attempts = 5;
374 ctx.cfg.max_msg_len = 80;
375 ctx.cfg.max_repodesc_len = 80;
376 ctx.cfg.max_blob_size = 0;
377 ctx.cfg.max_stats = 0;
378 ctx.cfg.project_list = NULL;
379 ctx.cfg.renamelimit = -1;
380 ctx.cfg.remove_suffix = 0;
381 ctx.cfg.robots = "index, nofollow";
382 ctx.cfg.root_title = "Git repository browser";
383 ctx.cfg.root_desc = "a fast webinterface for the git dscm";
384 ctx.cfg.scan_hidden_path = 0;
385 ctx.cfg.script_name = CGIT_SCRIPT_NAME;
386 ctx.cfg.section = "";
387 ctx.cfg.repository_sort = "name";
388 ctx.cfg.section_sort = 1;
389 ctx.cfg.summary_branches = 10;
390 ctx.cfg.summary_log = 10;
391 ctx.cfg.summary_tags = 10;
392 ctx.cfg.max_atom_items = 10;
393 ctx.cfg.difftype = DIFF_UNIFIED;
394 ctx.env.cgit_config = getenv("CGIT_CONFIG");
395 ctx.env.http_host = getenv("HTTP_HOST");
396 ctx.env.https = getenv("HTTPS");
397 ctx.env.no_http = getenv("NO_HTTP");
398 ctx.env.path_info = getenv("PATH_INFO");
399 ctx.env.query_string = getenv("QUERY_STRING");
400 ctx.env.request_method = getenv("REQUEST_METHOD");
401 ctx.env.script_name = getenv("SCRIPT_NAME");
402 ctx.env.server_name = getenv("SERVER_NAME");
403 ctx.env.server_port = getenv("SERVER_PORT");
404 ctx.env.http_cookie = getenv("HTTP_COOKIE");
405 ctx.env.http_referer = getenv("HTTP_REFERER");
406 ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
407 ctx.env.authenticated = 0;
408 ctx.page.mimetype = "text/html";
409 ctx.page.charset = PAGE_ENCODING;
410 ctx.page.filename = NULL;
411 ctx.page.size = 0;
412 ctx.page.modified = time(NULL);
413 ctx.page.expires = ctx.page.modified;
414 ctx.page.etag = NULL;
415 memset(&ctx.cfg.mimetypes, 0, sizeof(struct string_list));
416 if (ctx.env.script_name)
417 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
418 if (ctx.env.query_string)
419 ctx.qry.raw = xstrdup(ctx.env.query_string);
420 if (!ctx.env.cgit_config)
421 ctx.env.cgit_config = CGIT_CONFIG;
422}
423
424struct refmatch {
425 char *req_ref;
426 char *first_ref;
427 int match;
428};
429
430static int find_current_ref(const char *refname, const struct object_id *oid,
431 int flags, void *cb_data)
432{
433 struct refmatch *info;
434
435 info = (struct refmatch *)cb_data;
436 if (!strcmp(refname, info->req_ref))
437 info->match = 1;
438 if (!info->first_ref)
439 info->first_ref = xstrdup(refname);
440 return info->match;
441}
442
443static void free_refmatch_inner(struct refmatch *info)
444{
445 if (info->first_ref)
446 free(info->first_ref);
447}
448
449static char *find_default_branch(struct cgit_repo *repo)
450{
451 struct refmatch info;
452 char *ref;
453
454 info.req_ref = repo->defbranch;
455 info.first_ref = NULL;
456 info.match = 0;
457 for_each_branch_ref(find_current_ref, &info);
458 if (info.match)
459 ref = info.req_ref;
460 else
461 ref = info.first_ref;
462 if (ref)
463 ref = xstrdup(ref);
464 free_refmatch_inner(&info);
465
466 return ref;
467}
468
469static char *guess_defbranch(void)
470{
471 const char *ref;
472 unsigned char sha1[20];
473
474 ref = resolve_ref_unsafe("HEAD", 0, sha1, NULL);
475 if (!ref || !starts_with(ref, "refs/heads/"))
476 return "master";
477 return xstrdup(ref + 11);
478}
479/* The caller must free filename and ref after calling this. */
480static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
481{
482 const char *colon;
483
484 *filename = NULL;
485 *ref = NULL;
486
487 if (!readme || !readme[0])
488 return;
489
490 /* Check if the readme is tracked in the git repo. */
491 colon = strchr(readme, ':');
492 if (colon && strlen(colon) > 1) {
493 /* If it starts with a colon, we want to use
494 * the default branch */
495 if (colon == readme && repo->defbranch)
496 *ref = xstrdup(repo->defbranch);
497 else
498 *ref = xstrndup(readme, colon - readme);
499 readme = colon + 1;
500 }
501
502 /* Prepend repo path to relative readme path unless tracked. */
503 if (!(*ref) && readme[0] != '/')
504 *filename = fmtalloc("%s/%s", repo->path, readme);
505 else
506 *filename = xstrdup(readme);
507}
508static void choose_readme(struct cgit_repo *repo)
509{
510 int found;
511 char *filename, *ref;
512 struct string_list_item *entry;
513
514 if (!repo->readme.nr)
515 return;
516
517 found = 0;
518 for_each_string_list_item(entry, &repo->readme) {
519 parse_readme(entry->string, &filename, &ref, repo);
520 if (!filename) {
521 free(filename);
522 free(ref);
523 continue;
524 }
525 if (ref) {
526 if (cgit_ref_path_exists(filename, ref, 1)) {
527 found = 1;
528 break;
529 }
530 }
531 else if (!access(filename, R_OK)) {
532 found = 1;
533 break;
534 }
535 free(filename);
536 free(ref);
537 }
538 repo->readme.strdup_strings = 1;
539 string_list_clear(&repo->readme, 0);
540 repo->readme.strdup_strings = 0;
541 if (found)
542 string_list_append(&repo->readme, filename)->util = ref;
543}
544
545static void print_no_repo_clone_urls(const char *url)
546{
547 html("<tr><td><a rel='vcs-git' href='");
548 html_url_path(url);
549 html("' title='");
550 html_attr(ctx.repo->name);
551 html(" Git repository'>");
552 html_txt(url);
553 html("</a></td></tr>\n");
554}
555
556static int prepare_repo_cmd(void)
557{
558 unsigned char sha1[20];
559 int nongit = 0;
560 int rc;
561
562 /* The path to the git repository. */
563 setenv("GIT_DIR", ctx.repo->path, 1);
564
565 /* Do not look in /etc/ for gitconfig and gitattributes. */
566 setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
567 setenv("GIT_ATTR_NOSYSTEM", "1", 1);
568 unsetenv("HOME");
569 unsetenv("XDG_CONFIG_HOME");
570
571 /* Setup the git directory and initialize the notes system. Both of these
572 * load local configuration from the git repository, so we do them both while
573 * the HOME variables are unset. */
574 setup_git_directory_gently(&nongit);
575 init_display_notes(NULL);
576
577 if (nongit) {
578 const char *name = ctx.repo->name;
579 rc = errno;
580 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
581 "config error");
582 ctx.repo = NULL;
583 cgit_print_http_headers();
584 cgit_print_docstart();
585 cgit_print_pageheader();
586 cgit_print_error("Failed to open %s: %s", name,
587 rc ? strerror(rc) : "Not a valid git repository");
588 cgit_print_docend();
589 return 1;
590 }
591 ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
592
593 if (!ctx.repo->defbranch)
594 ctx.repo->defbranch = guess_defbranch();
595
596 if (!ctx.qry.head) {
597 ctx.qry.nohead = 1;
598 ctx.qry.head = find_default_branch(ctx.repo);
599 }
600
601 if (!ctx.qry.head) {
602 cgit_print_http_headers();
603 cgit_print_docstart();
604 cgit_print_pageheader();
605 cgit_print_error("Repository seems to be empty");
606 if (!strcmp(ctx.qry.page, "summary")) {
607 html("<table class='list'><tr class='nohover'><td> </td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
608 cgit_prepare_repo_env(ctx.repo);
609 cgit_add_clone_urls(print_no_repo_clone_urls);
610 html("</table>\n");
611 }
612 cgit_print_docend();
613 return 1;
614 }
615
616 if (get_sha1(ctx.qry.head, sha1)) {
617 char *tmp = xstrdup(ctx.qry.head);
618 ctx.qry.head = ctx.repo->defbranch;
619 cgit_print_error_page(404, "Not found",
620 "Invalid branch: %s", tmp);
621 free(tmp);
622 return 1;
623 }
624 string_list_sort(&ctx.repo->submodules);
625 cgit_prepare_repo_env(ctx.repo);
626 choose_readme(ctx.repo);
627 return 0;
628}
629
630static inline void open_auth_filter(const char *function)
631{
632 cgit_open_filter(ctx.cfg.auth_filter, function,
633 ctx.env.http_cookie ? ctx.env.http_cookie : "",
634 ctx.env.request_method ? ctx.env.request_method : "",
635 ctx.env.query_string ? ctx.env.query_string : "",
636 ctx.env.http_referer ? ctx.env.http_referer : "",
637 ctx.env.path_info ? ctx.env.path_info : "",
638 ctx.env.http_host ? ctx.env.http_host : "",
639 ctx.env.https ? ctx.env.https : "",
640 ctx.qry.repo ? ctx.qry.repo : "",
641 ctx.qry.page ? ctx.qry.page : "",
642 ctx.qry.url ? ctx.qry.url : "",
643 cgit_loginurl());
644}
645
646/* We intentionally keep this rather small, instead of looping and
647 * feeding it to the filter a couple bytes at a time. This way, the
648 * filter itself does not need to handle any denial of service or
649 * buffer bloat issues. If this winds up being too small, people
650 * will complain on the mailing list, and we'll increase it as needed. */
651#define MAX_AUTHENTICATION_POST_BYTES 4096
652/* The filter is expected to spit out "Status: " and all headers. */
653static inline void authenticate_post(void)
654{
655 char buffer[MAX_AUTHENTICATION_POST_BYTES];
656 unsigned int len;
657
658 open_auth_filter("authenticate-post");
659 len = ctx.env.content_length;
660 if (len > MAX_AUTHENTICATION_POST_BYTES)
661 len = MAX_AUTHENTICATION_POST_BYTES;
662 if (read(STDIN_FILENO, buffer, len) < 0)
663 die_errno("Could not read POST from stdin");
664 if (write(STDOUT_FILENO, buffer, len) < 0)
665 die_errno("Could not write POST to stdout");
666 cgit_close_filter(ctx.cfg.auth_filter);
667 exit(0);
668}
669
670static inline void authenticate_cookie(void)
671{
672 /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
673 if (!ctx.cfg.auth_filter) {
674 ctx.env.authenticated = 1;
675 return;
676 }
677
678 /* If we're having something POST'd to /login, we're authenticating POST,
679 * instead of the cookie, so call authenticate_post and bail out early.
680 * This pattern here should match /?p=login with POST. */
681 if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
682 !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
683 authenticate_post();
684 return;
685 }
686
687 /* If we've made it this far, we're authenticating the cookie for real, so do that. */
688 open_auth_filter("authenticate-cookie");
689 ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
690}
691
692static void process_request(void)
693{
694 struct cgit_cmd *cmd;
695
696 /* If we're not yet authenticated, no matter what page we're on,
697 * display the authentication body from the auth_filter. This should
698 * never be cached. */
699 if (!ctx.env.authenticated) {
700 ctx.page.title = "Authentication Required";
701 cgit_print_http_headers();
702 cgit_print_docstart();
703 cgit_print_pageheader();
704 open_auth_filter("body");
705 cgit_close_filter(ctx.cfg.auth_filter);
706 cgit_print_docend();
707 return;
708 }
709
710 cmd = cgit_get_cmd();
711 if (!cmd) {
712 ctx.page.title = "cgit error";
713 cgit_print_error_page(404, "Not found", "Invalid request");
714 return;
715 }
716
717 if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
718 ctx.page.title = "cgit error";
719 cgit_print_error_page(404, "Not found", "Invalid request");
720 return;
721 }
722
723 /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
724 * in-project path limit to be made available at ctx.qry.vpath.
725 * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
726 */
727 ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
728
729 if (cmd->want_repo && !ctx.repo) {
730 cgit_print_error_page(400, "Bad request",
731 "No repository selected");
732 return;
733 }
734
735 if (ctx.repo && prepare_repo_cmd())
736 return;
737
738 cmd->fn();
739}
740
741static int cmp_repos(const void *a, const void *b)
742{
743 const struct cgit_repo *ra = a, *rb = b;
744 return strcmp(ra->url, rb->url);
745}
746
747static char *build_snapshot_setting(int bitmap)
748{
749 const struct cgit_snapshot_format *f;
750 struct strbuf result = STRBUF_INIT;
751
752 for (f = cgit_snapshot_formats; f->suffix; f++) {
753 if (f->bit & bitmap) {
754 if (result.len)
755 strbuf_addch(&result, ' ');
756 strbuf_addstr(&result, f->suffix);
757 }
758 }
759 return strbuf_detach(&result, NULL);
760}
761
762static char *get_first_line(char *txt)
763{
764 char *t = xstrdup(txt);
765 char *p = strchr(t, '\n');
766 if (p)
767 *p = '\0';
768 return t;
769}
770
771static void print_repo(FILE *f, struct cgit_repo *repo)
772{
773 struct string_list_item *item;
774 fprintf(f, "repo.url=%s\n", repo->url);
775 fprintf(f, "repo.name=%s\n", repo->name);
776 fprintf(f, "repo.path=%s\n", repo->path);
777 if (repo->owner)
778 fprintf(f, "repo.owner=%s\n", repo->owner);
779 if (repo->desc) {
780 char *tmp = get_first_line(repo->desc);
781 fprintf(f, "repo.desc=%s\n", tmp);
782 free(tmp);
783 }
784 for_each_string_list_item(item, &repo->readme) {
785 if (item->util)
786 fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
787 else
788 fprintf(f, "repo.readme=%s\n", item->string);
789 }
790 if (repo->defbranch)
791 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
792 if (repo->module_link)
793 fprintf(f, "repo.module-link=%s\n", repo->module_link);
794 if (repo->section)
795 fprintf(f, "repo.section=%s\n", repo->section);
796 if (repo->clone_url)
797 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
798 fprintf(f, "repo.enable-commit-graph=%d\n",
799 repo->enable_commit_graph);
800 fprintf(f, "repo.enable-log-filecount=%d\n",
801 repo->enable_log_filecount);
802 fprintf(f, "repo.enable-log-linecount=%d\n",
803 repo->enable_log_linecount);
804 if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
805 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
806 if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
807 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
808 if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
809 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
810 if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
811 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
812 if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
813 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
814 if (repo->snapshots != ctx.cfg.snapshots) {
815 char *tmp = build_snapshot_setting(repo->snapshots);
816 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
817 free(tmp);
818 }
819 if (repo->max_stats != ctx.cfg.max_stats)
820 fprintf(f, "repo.max-stats=%s\n",
821 cgit_find_stats_periodname(repo->max_stats));
822 if (repo->logo)
823 fprintf(f, "repo.logo=%s\n", repo->logo);
824 if (repo->logo_link)
825 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
826 fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
827 fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
828 fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
829 if (repo->branch_sort == 1)
830 fprintf(f, "repo.branch-sort=age\n");
831 if (repo->commit_sort) {
832 if (repo->commit_sort == 1)
833 fprintf(f, "repo.commit-sort=date\n");
834 else if (repo->commit_sort == 2)
835 fprintf(f, "repo.commit-sort=topo\n");
836 }
837 fprintf(f, "repo.hide=%d\n", repo->hide);
838 fprintf(f, "repo.ignore=%d\n", repo->ignore);
839 fprintf(f, "\n");
840}
841
842static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
843{
844 int i;
845
846 for (i = start; i < list->count; i++)
847 print_repo(f, &list->repos[i]);
848}
849
850/* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
851 * and return 0 on success.
852 */
853static int generate_cached_repolist(const char *path, const char *cached_rc)
854{
855 struct strbuf locked_rc = STRBUF_INIT;
856 int result = 0;
857 int idx;
858 FILE *f;
859
860 strbuf_addf(&locked_rc, "%s.lock", cached_rc);
861 f = fopen(locked_rc.buf, "wx");
862 if (!f) {
863 /* Inform about the error unless the lockfile already existed,
864 * since that only means we've got concurrent requests.
865 */
866 result = errno;
867 if (result != EEXIST)
868 fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
869 locked_rc.buf, strerror(result), result);
870 goto out;
871 }
872 idx = cgit_repolist.count;
873 if (ctx.cfg.project_list)
874 scan_projects(path, ctx.cfg.project_list, repo_config);
875 else
876 scan_tree(path, repo_config);
877 print_repolist(f, &cgit_repolist, idx);
878 if (rename(locked_rc.buf, cached_rc))
879 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
880 locked_rc.buf, cached_rc, strerror(errno), errno);
881 fclose(f);
882out:
883 strbuf_release(&locked_rc);
884 return result;
885}
886
887static void process_cached_repolist(const char *path)
888{
889 struct stat st;
890 struct strbuf cached_rc = STRBUF_INIT;
891 time_t age;
892 unsigned long hash;
893
894 hash = hash_str(path);
895 if (ctx.cfg.project_list)
896 hash += hash_str(ctx.cfg.project_list);
897 strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
898
899 if (stat(cached_rc.buf, &st)) {
900 /* Nothing is cached, we need to scan without forking. And
901 * if we fail to generate a cached repolist, we need to
902 * invoke scan_tree manually.
903 */
904 if (generate_cached_repolist(path, cached_rc.buf)) {
905 if (ctx.cfg.project_list)
906 scan_projects(path, ctx.cfg.project_list,
907 repo_config);
908 else
909 scan_tree(path, repo_config);
910 }
911 goto out;
912 }
913
914 parse_configfile(cached_rc.buf, config_cb);
915
916 /* If the cached configfile hasn't expired, lets exit now */
917 age = time(NULL) - st.st_mtime;
918 if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
919 goto out;
920
921 /* The cached repolist has been parsed, but it was old. So lets
922 * rescan the specified path and generate a new cached repolist
923 * in a child-process to avoid latency for the current request.
924 */
925 if (fork())
926 goto out;
927
928 exit(generate_cached_repolist(path, cached_rc.buf));
929out:
930 strbuf_release(&cached_rc);
931}
932
933static void cgit_parse_args(int argc, const char **argv)
934{
935 int i;
936 int scan = 0;
937
938 for (i = 1; i < argc; i++) {
939 if (!strcmp(argv[i], "--version")) {
940 printf("CGit %s | http://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
941#ifdef NO_LUA
942 printf("[-] ");
943#else
944 printf("[+] ");
945#endif
946 printf("Lua scripting\n");
947#ifndef HAVE_LINUX_SENDFILE
948 printf("[-] ");
949#else
950 printf("[+] ");
951#endif
952 printf("Linux sendfile() usage\n");
953
954 exit(0);
955 }
956 if (starts_with(argv[i], "--cache=")) {
957 ctx.cfg.cache_root = xstrdup(argv[i] + 8);
958 } else if (!strcmp(argv[i], "--nocache")) {
959 ctx.cfg.nocache = 1;
960 } else if (!strcmp(argv[i], "--nohttp")) {
961 ctx.env.no_http = "1";
962 } else if (starts_with(argv[i], "--query=")) {
963 ctx.qry.raw = xstrdup(argv[i] + 8);
964 } else if (starts_with(argv[i], "--repo=")) {
965 ctx.qry.repo = xstrdup(argv[i] + 7);
966 } else if (starts_with(argv[i], "--page=")) {
967 ctx.qry.page = xstrdup(argv[i] + 7);
968 } else if (starts_with(argv[i], "--head=")) {
969 ctx.qry.head = xstrdup(argv[i] + 7);
970 ctx.qry.has_symref = 1;
971 } else if (starts_with(argv[i], "--sha1=")) {
972 ctx.qry.sha1 = xstrdup(argv[i] + 7);
973 ctx.qry.has_sha1 = 1;
974 } else if (starts_with(argv[i], "--ofs=")) {
975 ctx.qry.ofs = atoi(argv[i] + 6);
976 } else if (starts_with(argv[i], "--scan-tree=") ||
977 starts_with(argv[i], "--scan-path=")) {
978 /*
979 * HACK: The global snapshot bit mask defines the set
980 * of allowed snapshot formats, but the config file
981 * hasn't been parsed yet so the mask is currently 0.
982 * By setting all bits high before scanning we make
983 * sure that any in-repo cgitrc snapshot setting is
984 * respected by scan_tree().
985 *
986 * NOTE: We assume that there aren't more than 8
987 * different snapshot formats supported by cgit...
988 */
989 ctx.cfg.snapshots = 0xFF;
990 scan++;
991 scan_tree(argv[i] + 12, repo_config);
992 }
993 }
994 if (scan) {
995 qsort(cgit_repolist.repos, cgit_repolist.count,
996 sizeof(struct cgit_repo), cmp_repos);
997 print_repolist(stdout, &cgit_repolist, 0);
998 exit(0);
999 }
1000}
1001
1002static int calc_ttl(void)
1003{
1004 if (!ctx.repo)
1005 return ctx.cfg.cache_root_ttl;
1006
1007 if (!ctx.qry.page)
1008 return ctx.cfg.cache_repo_ttl;
1009
1010 if (!strcmp(ctx.qry.page, "about"))
1011 return ctx.cfg.cache_about_ttl;
1012
1013 if (!strcmp(ctx.qry.page, "snapshot"))
1014 return ctx.cfg.cache_snapshot_ttl;
1015
1016 if (ctx.qry.has_sha1)
1017 return ctx.cfg.cache_static_ttl;
1018
1019 if (ctx.qry.has_symref)
1020 return ctx.cfg.cache_dynamic_ttl;
1021
1022 return ctx.cfg.cache_repo_ttl;
1023}
1024
1025int main(int argc, const char **argv)
1026{
1027 const char *path;
1028 int err, ttl;
1029
1030 cgit_init_filters();
1031 atexit(cgit_cleanup_filters);
1032
1033 prepare_context();
1034 cgit_repolist.length = 0;
1035 cgit_repolist.count = 0;
1036 cgit_repolist.repos = NULL;
1037
1038 cgit_parse_args(argc, argv);
1039 parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1040 ctx.repo = NULL;
1041 http_parse_querystring(ctx.qry.raw, querystring_cb);
1042
1043 /* If virtual-root isn't specified in cgitrc, lets pretend
1044 * that virtual-root equals SCRIPT_NAME, minus any possibly
1045 * trailing slashes.
1046 */
1047 if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1048 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1049
1050 /* If no url parameter is specified on the querystring, lets
1051 * use PATH_INFO as url. This allows cgit to work with virtual
1052 * urls without the need for rewriterules in the webserver (as
1053 * long as PATH_INFO is included in the cache lookup key).
1054 */
1055 path = ctx.env.path_info;
1056 if (!ctx.qry.url && path) {
1057 if (path[0] == '/')
1058 path++;
1059 ctx.qry.url = xstrdup(path);
1060 if (ctx.qry.raw) {
1061 char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1062 free(ctx.qry.raw);
1063 ctx.qry.raw = newqry;
1064 } else
1065 ctx.qry.raw = xstrdup(ctx.qry.url);
1066 cgit_parse_url(ctx.qry.url);
1067 }
1068
1069 /* Before we go any further, we set ctx.env.authenticated by checking to see
1070 * if the supplied cookie is valid. All cookies are valid if there is no
1071 * auth_filter. If there is an auth_filter, the filter decides. */
1072 authenticate_cookie();
1073
1074 ttl = calc_ttl();
1075 if (ttl < 0)
1076 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1077 else
1078 ctx.page.expires += ttl * 60;
1079 if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1080 ctx.cfg.nocache = 1;
1081 if (ctx.cfg.nocache)
1082 ctx.cfg.cache_size = 0;
1083 err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1084 ctx.qry.raw, ttl, process_request);
1085 cgit_cleanup_filters();
1086 if (err)
1087 cgit_print_error("Error processing page: %s (%d)",
1088 strerror(err), err);
1089 return err;
1090}