]> gitweb.ps.run Git - ps-cgit/blob - cgit.c
ui-tree: allow per repository override for enable-blame
[ps-cgit] / cgit.c
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
20 const char *cgit_version = CGIT_VERSION;
21
22 static 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, name);
27         item->util = xstrdup(value);
28 }
29
30 static void process_cached_repolist(const char *path);
31
32 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
33 {
34         const char *path;
35         struct string_list_item *item;
36
37         if (!strcmp(name, "name"))
38                 repo->name = xstrdup(value);
39         else if (!strcmp(name, "clone-url"))
40                 repo->clone_url = xstrdup(value);
41         else if (!strcmp(name, "desc"))
42                 repo->desc = xstrdup(value);
43         else if (!strcmp(name, "owner"))
44                 repo->owner = xstrdup(value);
45         else if (!strcmp(name, "homepage"))
46                 repo->homepage = xstrdup(value);
47         else if (!strcmp(name, "defbranch"))
48                 repo->defbranch = xstrdup(value);
49         else if (!strcmp(name, "extra-head-content"))
50                 repo->extra_head_content = xstrdup(value);
51         else if (!strcmp(name, "snapshots"))
52                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
53         else if (!strcmp(name, "enable-blame"))
54                 repo->enable_blame = atoi(value);
55         else if (!strcmp(name, "enable-commit-graph"))
56                 repo->enable_commit_graph = atoi(value);
57         else if (!strcmp(name, "enable-log-filecount"))
58                 repo->enable_log_filecount = atoi(value);
59         else if (!strcmp(name, "enable-log-linecount"))
60                 repo->enable_log_linecount = atoi(value);
61         else if (!strcmp(name, "enable-remote-branches"))
62                 repo->enable_remote_branches = atoi(value);
63         else if (!strcmp(name, "enable-subject-links"))
64                 repo->enable_subject_links = atoi(value);
65         else if (!strcmp(name, "enable-html-serving"))
66                 repo->enable_html_serving = atoi(value);
67         else if (!strcmp(name, "branch-sort")) {
68                 if (!strcmp(value, "age"))
69                         repo->branch_sort = 1;
70                 if (!strcmp(value, "name"))
71                         repo->branch_sort = 0;
72         } else if (!strcmp(name, "commit-sort")) {
73                 if (!strcmp(value, "date"))
74                         repo->commit_sort = 1;
75                 if (!strcmp(value, "topo"))
76                         repo->commit_sort = 2;
77         } else if (!strcmp(name, "max-stats"))
78                 repo->max_stats = cgit_find_stats_period(value, NULL);
79         else if (!strcmp(name, "module-link"))
80                 repo->module_link= xstrdup(value);
81         else if (skip_prefix(name, "module-link.", &path)) {
82                 item = string_list_append(&repo->submodules, xstrdup(path));
83                 item->util = xstrdup(value);
84         } else if (!strcmp(name, "section"))
85                 repo->section = xstrdup(value);
86         else if (!strcmp(name, "snapshot-prefix"))
87                 repo->snapshot_prefix = xstrdup(value);
88         else if (!strcmp(name, "readme") && value != NULL) {
89                 if (repo->readme.items == ctx.cfg.readme.items)
90                         memset(&repo->readme, 0, sizeof(repo->readme));
91                 string_list_append(&repo->readme, xstrdup(value));
92         } else if (!strcmp(name, "logo") && value != NULL)
93                 repo->logo = xstrdup(value);
94         else if (!strcmp(name, "logo-link") && value != NULL)
95                 repo->logo_link = xstrdup(value);
96         else if (!strcmp(name, "hide"))
97                 repo->hide = atoi(value);
98         else if (!strcmp(name, "ignore"))
99                 repo->ignore = atoi(value);
100         else if (ctx.cfg.enable_filter_overrides) {
101                 if (!strcmp(name, "about-filter"))
102                         repo->about_filter = cgit_new_filter(value, ABOUT);
103                 else if (!strcmp(name, "commit-filter"))
104                         repo->commit_filter = cgit_new_filter(value, COMMIT);
105                 else if (!strcmp(name, "source-filter"))
106                         repo->source_filter = cgit_new_filter(value, SOURCE);
107                 else if (!strcmp(name, "email-filter"))
108                         repo->email_filter = cgit_new_filter(value, EMAIL);
109                 else if (!strcmp(name, "owner-filter"))
110                         repo->owner_filter = cgit_new_filter(value, OWNER);
111         }
112 }
113
114 static void config_cb(const char *name, const char *value)
115 {
116         const char *arg;
117
118         if (!strcmp(name, "section"))
119                 ctx.cfg.section = xstrdup(value);
120         else if (!strcmp(name, "repo.url"))
121                 ctx.repo = cgit_add_repo(value);
122         else if (ctx.repo && !strcmp(name, "repo.path"))
123                 ctx.repo->path = trim_end(value, '/');
124         else if (ctx.repo && skip_prefix(name, "repo.", &arg))
125                 repo_config(ctx.repo, arg, value);
126         else if (!strcmp(name, "readme"))
127                 string_list_append(&ctx.cfg.readme, xstrdup(value));
128         else if (!strcmp(name, "root-title"))
129                 ctx.cfg.root_title = xstrdup(value);
130         else if (!strcmp(name, "root-desc"))
131                 ctx.cfg.root_desc = xstrdup(value);
132         else if (!strcmp(name, "root-readme"))
133                 ctx.cfg.root_readme = xstrdup(value);
134         else if (!strcmp(name, "css"))
135                 ctx.cfg.css = xstrdup(value);
136         else if (!strcmp(name, "favicon"))
137                 ctx.cfg.favicon = xstrdup(value);
138         else if (!strcmp(name, "footer"))
139                 ctx.cfg.footer = xstrdup(value);
140         else if (!strcmp(name, "head-include"))
141                 ctx.cfg.head_include = xstrdup(value);
142         else if (!strcmp(name, "header"))
143                 ctx.cfg.header = xstrdup(value);
144         else if (!strcmp(name, "logo"))
145                 ctx.cfg.logo = xstrdup(value);
146         else if (!strcmp(name, "logo-link"))
147                 ctx.cfg.logo_link = xstrdup(value);
148         else if (!strcmp(name, "module-link"))
149                 ctx.cfg.module_link = xstrdup(value);
150         else if (!strcmp(name, "strict-export"))
151                 ctx.cfg.strict_export = xstrdup(value);
152         else if (!strcmp(name, "virtual-root"))
153                 ctx.cfg.virtual_root = ensure_end(value, '/');
154         else if (!strcmp(name, "noplainemail"))
155                 ctx.cfg.noplainemail = atoi(value);
156         else if (!strcmp(name, "noheader"))
157                 ctx.cfg.noheader = atoi(value);
158         else if (!strcmp(name, "snapshots"))
159                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
160         else if (!strcmp(name, "enable-filter-overrides"))
161                 ctx.cfg.enable_filter_overrides = atoi(value);
162         else if (!strcmp(name, "enable-follow-links"))
163                 ctx.cfg.enable_follow_links = atoi(value);
164         else if (!strcmp(name, "enable-http-clone"))
165                 ctx.cfg.enable_http_clone = atoi(value);
166         else if (!strcmp(name, "enable-index-links"))
167                 ctx.cfg.enable_index_links = atoi(value);
168         else if (!strcmp(name, "enable-index-owner"))
169                 ctx.cfg.enable_index_owner = atoi(value);
170         else if (!strcmp(name, "enable-blame"))
171                 ctx.cfg.enable_blame = atoi(value);
172         else if (!strcmp(name, "enable-commit-graph"))
173                 ctx.cfg.enable_commit_graph = atoi(value);
174         else if (!strcmp(name, "enable-log-filecount"))
175                 ctx.cfg.enable_log_filecount = atoi(value);
176         else if (!strcmp(name, "enable-log-linecount"))
177                 ctx.cfg.enable_log_linecount = atoi(value);
178         else if (!strcmp(name, "enable-remote-branches"))
179                 ctx.cfg.enable_remote_branches = atoi(value);
180         else if (!strcmp(name, "enable-subject-links"))
181                 ctx.cfg.enable_subject_links = atoi(value);
182         else if (!strcmp(name, "enable-html-serving"))
183                 ctx.cfg.enable_html_serving = atoi(value);
184         else if (!strcmp(name, "enable-tree-linenumbers"))
185                 ctx.cfg.enable_tree_linenumbers = atoi(value);
186         else if (!strcmp(name, "enable-git-config"))
187                 ctx.cfg.enable_git_config = atoi(value);
188         else if (!strcmp(name, "max-stats"))
189                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
190         else if (!strcmp(name, "cache-size"))
191                 ctx.cfg.cache_size = atoi(value);
192         else if (!strcmp(name, "cache-root"))
193                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
194         else if (!strcmp(name, "cache-root-ttl"))
195                 ctx.cfg.cache_root_ttl = atoi(value);
196         else if (!strcmp(name, "cache-repo-ttl"))
197                 ctx.cfg.cache_repo_ttl = atoi(value);
198         else if (!strcmp(name, "cache-scanrc-ttl"))
199                 ctx.cfg.cache_scanrc_ttl = atoi(value);
200         else if (!strcmp(name, "cache-static-ttl"))
201                 ctx.cfg.cache_static_ttl = atoi(value);
202         else if (!strcmp(name, "cache-dynamic-ttl"))
203                 ctx.cfg.cache_dynamic_ttl = atoi(value);
204         else if (!strcmp(name, "cache-about-ttl"))
205                 ctx.cfg.cache_about_ttl = atoi(value);
206         else if (!strcmp(name, "cache-snapshot-ttl"))
207                 ctx.cfg.cache_snapshot_ttl = atoi(value);
208         else if (!strcmp(name, "case-sensitive-sort"))
209                 ctx.cfg.case_sensitive_sort = atoi(value);
210         else if (!strcmp(name, "about-filter"))
211                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
212         else if (!strcmp(name, "commit-filter"))
213                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
214         else if (!strcmp(name, "email-filter"))
215                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
216         else if (!strcmp(name, "owner-filter"))
217                 ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
218         else if (!strcmp(name, "auth-filter"))
219                 ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
220         else if (!strcmp(name, "embedded"))
221                 ctx.cfg.embedded = atoi(value);
222         else if (!strcmp(name, "max-atom-items"))
223                 ctx.cfg.max_atom_items = atoi(value);
224         else if (!strcmp(name, "max-message-length"))
225                 ctx.cfg.max_msg_len = atoi(value);
226         else if (!strcmp(name, "max-repodesc-length"))
227                 ctx.cfg.max_repodesc_len = atoi(value);
228         else if (!strcmp(name, "max-blob-size"))
229                 ctx.cfg.max_blob_size = atoi(value);
230         else if (!strcmp(name, "max-repo-count"))
231                 ctx.cfg.max_repo_count = atoi(value);
232         else if (!strcmp(name, "max-commit-count"))
233                 ctx.cfg.max_commit_count = atoi(value);
234         else if (!strcmp(name, "project-list"))
235                 ctx.cfg.project_list = xstrdup(expand_macros(value));
236         else if (!strcmp(name, "scan-path"))
237                 if (ctx.cfg.cache_size)
238                         process_cached_repolist(expand_macros(value));
239                 else if (ctx.cfg.project_list)
240                         scan_projects(expand_macros(value),
241                                       ctx.cfg.project_list, repo_config);
242                 else
243                         scan_tree(expand_macros(value), repo_config);
244         else if (!strcmp(name, "scan-hidden-path"))
245                 ctx.cfg.scan_hidden_path = atoi(value);
246         else if (!strcmp(name, "section-from-path"))
247                 ctx.cfg.section_from_path = atoi(value);
248         else if (!strcmp(name, "repository-sort"))
249                 ctx.cfg.repository_sort = xstrdup(value);
250         else if (!strcmp(name, "section-sort"))
251                 ctx.cfg.section_sort = atoi(value);
252         else if (!strcmp(name, "source-filter"))
253                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
254         else if (!strcmp(name, "summary-log"))
255                 ctx.cfg.summary_log = atoi(value);
256         else if (!strcmp(name, "summary-branches"))
257                 ctx.cfg.summary_branches = atoi(value);
258         else if (!strcmp(name, "summary-tags"))
259                 ctx.cfg.summary_tags = atoi(value);
260         else if (!strcmp(name, "side-by-side-diffs"))
261                 ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
262         else if (!strcmp(name, "agefile"))
263                 ctx.cfg.agefile = xstrdup(value);
264         else if (!strcmp(name, "mimetype-file"))
265                 ctx.cfg.mimetype_file = xstrdup(value);
266         else if (!strcmp(name, "renamelimit"))
267                 ctx.cfg.renamelimit = atoi(value);
268         else if (!strcmp(name, "remove-suffix"))
269                 ctx.cfg.remove_suffix = atoi(value);
270         else if (!strcmp(name, "robots"))
271                 ctx.cfg.robots = xstrdup(value);
272         else if (!strcmp(name, "clone-prefix"))
273                 ctx.cfg.clone_prefix = xstrdup(value);
274         else if (!strcmp(name, "clone-url"))
275                 ctx.cfg.clone_url = xstrdup(value);
276         else if (!strcmp(name, "local-time"))
277                 ctx.cfg.local_time = atoi(value);
278         else if (!strcmp(name, "commit-sort")) {
279                 if (!strcmp(value, "date"))
280                         ctx.cfg.commit_sort = 1;
281                 if (!strcmp(value, "topo"))
282                         ctx.cfg.commit_sort = 2;
283         } else if (!strcmp(name, "branch-sort")) {
284                 if (!strcmp(value, "age"))
285                         ctx.cfg.branch_sort = 1;
286                 if (!strcmp(value, "name"))
287                         ctx.cfg.branch_sort = 0;
288         } else if (skip_prefix(name, "mimetype.", &arg))
289                 add_mimetype(arg, value);
290         else if (!strcmp(name, "include"))
291                 parse_configfile(expand_macros(value), config_cb);
292 }
293
294 static void querystring_cb(const char *name, const char *value)
295 {
296         if (!value)
297                 value = "";
298
299         if (!strcmp(name,"r")) {
300                 ctx.qry.repo = xstrdup(value);
301                 ctx.repo = cgit_get_repoinfo(value);
302         } else if (!strcmp(name, "p")) {
303                 ctx.qry.page = xstrdup(value);
304         } else if (!strcmp(name, "url")) {
305                 if (*value == '/')
306                         value++;
307                 ctx.qry.url = xstrdup(value);
308                 cgit_parse_url(value);
309         } else if (!strcmp(name, "qt")) {
310                 ctx.qry.grep = xstrdup(value);
311         } else if (!strcmp(name, "q")) {
312                 ctx.qry.search = xstrdup(value);
313         } else if (!strcmp(name, "h")) {
314                 ctx.qry.head = xstrdup(value);
315                 ctx.qry.has_symref = 1;
316         } else if (!strcmp(name, "id")) {
317                 ctx.qry.sha1 = xstrdup(value);
318                 ctx.qry.has_sha1 = 1;
319         } else if (!strcmp(name, "id2")) {
320                 ctx.qry.sha2 = xstrdup(value);
321                 ctx.qry.has_sha1 = 1;
322         } else if (!strcmp(name, "ofs")) {
323                 ctx.qry.ofs = atoi(value);
324         } else if (!strcmp(name, "path")) {
325                 ctx.qry.path = trim_end(value, '/');
326         } else if (!strcmp(name, "name")) {
327                 ctx.qry.name = xstrdup(value);
328         } else if (!strcmp(name, "s")) {
329                 ctx.qry.sort = xstrdup(value);
330         } else if (!strcmp(name, "showmsg")) {
331                 ctx.qry.showmsg = atoi(value);
332         } else if (!strcmp(name, "period")) {
333                 ctx.qry.period = xstrdup(value);
334         } else if (!strcmp(name, "dt")) {
335                 ctx.qry.difftype = atoi(value);
336                 ctx.qry.has_difftype = 1;
337         } else if (!strcmp(name, "ss")) {
338                 /* No longer generated, but there may be links out there. */
339                 ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
340                 ctx.qry.has_difftype = 1;
341         } else if (!strcmp(name, "all")) {
342                 ctx.qry.show_all = atoi(value);
343         } else if (!strcmp(name, "context")) {
344                 ctx.qry.context = atoi(value);
345         } else if (!strcmp(name, "ignorews")) {
346                 ctx.qry.ignorews = atoi(value);
347         } else if (!strcmp(name, "follow")) {
348                 ctx.qry.follow = atoi(value);
349         }
350 }
351
352 static void prepare_context(void)
353 {
354         memset(&ctx, 0, sizeof(ctx));
355         ctx.cfg.agefile = "info/web/last-modified";
356         ctx.cfg.cache_size = 0;
357         ctx.cfg.cache_max_create_time = 5;
358         ctx.cfg.cache_root = CGIT_CACHE_ROOT;
359         ctx.cfg.cache_about_ttl = 15;
360         ctx.cfg.cache_snapshot_ttl = 5;
361         ctx.cfg.cache_repo_ttl = 5;
362         ctx.cfg.cache_root_ttl = 5;
363         ctx.cfg.cache_scanrc_ttl = 15;
364         ctx.cfg.cache_dynamic_ttl = 5;
365         ctx.cfg.cache_static_ttl = -1;
366         ctx.cfg.case_sensitive_sort = 1;
367         ctx.cfg.branch_sort = 0;
368         ctx.cfg.commit_sort = 0;
369         ctx.cfg.css = "/cgit.css";
370         ctx.cfg.logo = "/cgit.png";
371         ctx.cfg.favicon = "/favicon.ico";
372         ctx.cfg.local_time = 0;
373         ctx.cfg.enable_http_clone = 1;
374         ctx.cfg.enable_index_owner = 1;
375         ctx.cfg.enable_tree_linenumbers = 1;
376         ctx.cfg.enable_git_config = 0;
377         ctx.cfg.max_repo_count = 50;
378         ctx.cfg.max_commit_count = 50;
379         ctx.cfg.max_lock_attempts = 5;
380         ctx.cfg.max_msg_len = 80;
381         ctx.cfg.max_repodesc_len = 80;
382         ctx.cfg.max_blob_size = 0;
383         ctx.cfg.max_stats = 0;
384         ctx.cfg.project_list = NULL;
385         ctx.cfg.renamelimit = -1;
386         ctx.cfg.remove_suffix = 0;
387         ctx.cfg.robots = "index, nofollow";
388         ctx.cfg.root_title = "Git repository browser";
389         ctx.cfg.root_desc = "a fast webinterface for the git dscm";
390         ctx.cfg.scan_hidden_path = 0;
391         ctx.cfg.script_name = CGIT_SCRIPT_NAME;
392         ctx.cfg.section = "";
393         ctx.cfg.repository_sort = "name";
394         ctx.cfg.section_sort = 1;
395         ctx.cfg.summary_branches = 10;
396         ctx.cfg.summary_log = 10;
397         ctx.cfg.summary_tags = 10;
398         ctx.cfg.max_atom_items = 10;
399         ctx.cfg.difftype = DIFF_UNIFIED;
400         ctx.env.cgit_config = getenv("CGIT_CONFIG");
401         ctx.env.http_host = getenv("HTTP_HOST");
402         ctx.env.https = getenv("HTTPS");
403         ctx.env.no_http = getenv("NO_HTTP");
404         ctx.env.path_info = getenv("PATH_INFO");
405         ctx.env.query_string = getenv("QUERY_STRING");
406         ctx.env.request_method = getenv("REQUEST_METHOD");
407         ctx.env.script_name = getenv("SCRIPT_NAME");
408         ctx.env.server_name = getenv("SERVER_NAME");
409         ctx.env.server_port = getenv("SERVER_PORT");
410         ctx.env.http_cookie = getenv("HTTP_COOKIE");
411         ctx.env.http_referer = getenv("HTTP_REFERER");
412         ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
413         ctx.env.authenticated = 0;
414         ctx.page.mimetype = "text/html";
415         ctx.page.charset = PAGE_ENCODING;
416         ctx.page.filename = NULL;
417         ctx.page.size = 0;
418         ctx.page.modified = time(NULL);
419         ctx.page.expires = ctx.page.modified;
420         ctx.page.etag = NULL;
421         string_list_init(&ctx.cfg.mimetypes, 1);
422         if (ctx.env.script_name)
423                 ctx.cfg.script_name = xstrdup(ctx.env.script_name);
424         if (ctx.env.query_string)
425                 ctx.qry.raw = xstrdup(ctx.env.query_string);
426         if (!ctx.env.cgit_config)
427                 ctx.env.cgit_config = CGIT_CONFIG;
428 }
429
430 struct refmatch {
431         char *req_ref;
432         char *first_ref;
433         int match;
434 };
435
436 static int find_current_ref(const char *refname, const struct object_id *oid,
437                             int flags, void *cb_data)
438 {
439         struct refmatch *info;
440
441         info = (struct refmatch *)cb_data;
442         if (!strcmp(refname, info->req_ref))
443                 info->match = 1;
444         if (!info->first_ref)
445                 info->first_ref = xstrdup(refname);
446         return info->match;
447 }
448
449 static void free_refmatch_inner(struct refmatch *info)
450 {
451         if (info->first_ref)
452                 free(info->first_ref);
453 }
454
455 static char *find_default_branch(struct cgit_repo *repo)
456 {
457         struct refmatch info;
458         char *ref;
459
460         info.req_ref = repo->defbranch;
461         info.first_ref = NULL;
462         info.match = 0;
463         for_each_branch_ref(find_current_ref, &info);
464         if (info.match)
465                 ref = info.req_ref;
466         else
467                 ref = info.first_ref;
468         if (ref)
469                 ref = xstrdup(ref);
470         free_refmatch_inner(&info);
471
472         return ref;
473 }
474
475 static char *guess_defbranch(void)
476 {
477         const char *ref, *refname;
478         struct object_id oid;
479
480         ref = resolve_ref_unsafe("HEAD", 0, &oid, NULL);
481         if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
482                 return "master";
483         return xstrdup(refname);
484 }
485
486 /* The caller must free filename and ref after calling this. */
487 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
488 {
489         const char *colon;
490
491         *filename = NULL;
492         *ref = NULL;
493
494         if (!readme || !readme[0])
495                 return;
496
497         /* Check if the readme is tracked in the git repo. */
498         colon = strchr(readme, ':');
499         if (colon && strlen(colon) > 1) {
500                 /* If it starts with a colon, we want to use
501                  * the default branch */
502                 if (colon == readme && repo->defbranch)
503                         *ref = xstrdup(repo->defbranch);
504                 else
505                         *ref = xstrndup(readme, colon - readme);
506                 readme = colon + 1;
507         }
508
509         /* Prepend repo path to relative readme path unless tracked. */
510         if (!(*ref) && readme[0] != '/')
511                 *filename = fmtalloc("%s/%s", repo->path, readme);
512         else
513                 *filename = xstrdup(readme);
514 }
515 static void choose_readme(struct cgit_repo *repo)
516 {
517         int found;
518         char *filename, *ref;
519         struct string_list_item *entry;
520
521         if (!repo->readme.nr)
522                 return;
523
524         found = 0;
525         for_each_string_list_item(entry, &repo->readme) {
526                 parse_readme(entry->string, &filename, &ref, repo);
527                 if (!filename) {
528                         free(filename);
529                         free(ref);
530                         continue;
531                 }
532                 if (ref) {
533                         if (cgit_ref_path_exists(filename, ref, 1)) {
534                                 found = 1;
535                                 break;
536                         }
537                 }
538                 else if (!access(filename, R_OK)) {
539                         found = 1;
540                         break;
541                 }
542                 free(filename);
543                 free(ref);
544         }
545         repo->readme.strdup_strings = 1;
546         string_list_clear(&repo->readme, 0);
547         repo->readme.strdup_strings = 0;
548         if (found)
549                 string_list_append(&repo->readme, filename)->util = ref;
550 }
551
552 static void print_no_repo_clone_urls(const char *url)
553 {
554         html("<tr><td><a rel='vcs-git' href='");
555         html_url_path(url);
556         html("' title='");
557         html_attr(ctx.repo->name);
558         html(" Git repository'>");
559         html_txt(url);
560         html("</a></td></tr>\n");
561 }
562
563 static void prepare_repo_env(int *nongit)
564 {
565         /* The path to the git repository. */
566         setenv("GIT_DIR", ctx.repo->path, 1);
567
568         /* Do not look in /etc/ for gitconfig and gitattributes. */
569         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
570         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
571         unsetenv("HOME");
572         unsetenv("XDG_CONFIG_HOME");
573
574         /* Setup the git directory and initialize the notes system. Both of these
575          * load local configuration from the git repository, so we do them both while
576          * the HOME variables are unset. */
577         setup_git_directory_gently(nongit);
578         init_display_notes(NULL);
579 }
580 static int prepare_repo_cmd(int nongit)
581 {
582         struct object_id oid;
583         int rc;
584
585         if (nongit) {
586                 const char *name = ctx.repo->name;
587                 rc = errno;
588                 ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
589                                                 "config error");
590                 ctx.repo = NULL;
591                 cgit_print_http_headers();
592                 cgit_print_docstart();
593                 cgit_print_pageheader();
594                 cgit_print_error("Failed to open %s: %s", name,
595                                  rc ? strerror(rc) : "Not a valid git repository");
596                 cgit_print_docend();
597                 return 1;
598         }
599         ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
600
601         if (!ctx.repo->defbranch)
602                 ctx.repo->defbranch = guess_defbranch();
603
604         if (!ctx.qry.head) {
605                 ctx.qry.nohead = 1;
606                 ctx.qry.head = find_default_branch(ctx.repo);
607         }
608
609         if (!ctx.qry.head) {
610                 cgit_print_http_headers();
611                 cgit_print_docstart();
612                 cgit_print_pageheader();
613                 cgit_print_error("Repository seems to be empty");
614                 if (!strcmp(ctx.qry.page, "summary")) {
615                         html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
616                         cgit_prepare_repo_env(ctx.repo);
617                         cgit_add_clone_urls(print_no_repo_clone_urls);
618                         html("</table>\n");
619                 }
620                 cgit_print_docend();
621                 return 1;
622         }
623
624         if (get_oid(ctx.qry.head, &oid)) {
625                 char *old_head = ctx.qry.head;
626                 ctx.qry.head = xstrdup(ctx.repo->defbranch);
627                 cgit_print_error_page(404, "Not found",
628                                 "Invalid branch: %s", old_head);
629                 free(old_head);
630                 return 1;
631         }
632         string_list_sort(&ctx.repo->submodules);
633         cgit_prepare_repo_env(ctx.repo);
634         choose_readme(ctx.repo);
635         return 0;
636 }
637
638 static inline void open_auth_filter(const char *function)
639 {
640         cgit_open_filter(ctx.cfg.auth_filter, function,
641                 ctx.env.http_cookie ? ctx.env.http_cookie : "",
642                 ctx.env.request_method ? ctx.env.request_method : "",
643                 ctx.env.query_string ? ctx.env.query_string : "",
644                 ctx.env.http_referer ? ctx.env.http_referer : "",
645                 ctx.env.path_info ? ctx.env.path_info : "",
646                 ctx.env.http_host ? ctx.env.http_host : "",
647                 ctx.env.https ? ctx.env.https : "",
648                 ctx.qry.repo ? ctx.qry.repo : "",
649                 ctx.qry.page ? ctx.qry.page : "",
650                 cgit_currentfullurl(),
651                 cgit_loginurl());
652 }
653
654 /* We intentionally keep this rather small, instead of looping and
655  * feeding it to the filter a couple bytes at a time. This way, the
656  * filter itself does not need to handle any denial of service or
657  * buffer bloat issues. If this winds up being too small, people
658  * will complain on the mailing list, and we'll increase it as needed. */
659 #define MAX_AUTHENTICATION_POST_BYTES 4096
660 /* The filter is expected to spit out "Status: " and all headers. */
661 static inline void authenticate_post(void)
662 {
663         char buffer[MAX_AUTHENTICATION_POST_BYTES];
664         ssize_t len;
665
666         open_auth_filter("authenticate-post");
667         len = ctx.env.content_length;
668         if (len > MAX_AUTHENTICATION_POST_BYTES)
669                 len = MAX_AUTHENTICATION_POST_BYTES;
670         if ((len = read(STDIN_FILENO, buffer, len)) < 0)
671                 die_errno("Could not read POST from stdin");
672         if (write(STDOUT_FILENO, buffer, len) < 0)
673                 die_errno("Could not write POST to stdout");
674         cgit_close_filter(ctx.cfg.auth_filter);
675         exit(0);
676 }
677
678 static inline void authenticate_cookie(void)
679 {
680         /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
681         if (!ctx.cfg.auth_filter) {
682                 ctx.env.authenticated = 1;
683                 return;
684         }
685
686         /* If we're having something POST'd to /login, we're authenticating POST,
687          * instead of the cookie, so call authenticate_post and bail out early.
688          * This pattern here should match /?p=login with POST. */
689         if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
690             !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
691                 authenticate_post();
692                 return;
693         }
694
695         /* If we've made it this far, we're authenticating the cookie for real, so do that. */
696         open_auth_filter("authenticate-cookie");
697         ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
698 }
699
700 static void process_request(void)
701 {
702         struct cgit_cmd *cmd;
703         int nongit = 0;
704
705         /* If we're not yet authenticated, no matter what page we're on,
706          * display the authentication body from the auth_filter. This should
707          * never be cached. */
708         if (!ctx.env.authenticated) {
709                 ctx.page.title = "Authentication Required";
710                 cgit_print_http_headers();
711                 cgit_print_docstart();
712                 cgit_print_pageheader();
713                 open_auth_filter("body");
714                 cgit_close_filter(ctx.cfg.auth_filter);
715                 cgit_print_docend();
716                 return;
717         }
718
719         if (ctx.repo)
720                 prepare_repo_env(&nongit);
721
722         cmd = cgit_get_cmd();
723         if (!cmd) {
724                 ctx.page.title = "cgit error";
725                 cgit_print_error_page(404, "Not found", "Invalid request");
726                 return;
727         }
728
729         if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
730                 ctx.page.title = "cgit error";
731                 cgit_print_error_page(404, "Not found", "Invalid request");
732                 return;
733         }
734
735         if (cmd->want_repo && !ctx.repo) {
736                 cgit_print_error_page(400, "Bad request",
737                                 "No repository selected");
738                 return;
739         }
740
741         /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
742          * in-project path limit to be made available at ctx.qry.vpath.
743          * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
744          */
745         ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
746
747         if (ctx.repo && prepare_repo_cmd(nongit))
748                 return;
749
750         cmd->fn();
751 }
752
753 static int cmp_repos(const void *a, const void *b)
754 {
755         const struct cgit_repo *ra = a, *rb = b;
756         return strcmp(ra->url, rb->url);
757 }
758
759 static char *build_snapshot_setting(int bitmap)
760 {
761         const struct cgit_snapshot_format *f;
762         struct strbuf result = STRBUF_INIT;
763
764         for (f = cgit_snapshot_formats; f->suffix; f++) {
765                 if (cgit_snapshot_format_bit(f) & bitmap) {
766                         if (result.len)
767                                 strbuf_addch(&result, ' ');
768                         strbuf_addstr(&result, f->suffix);
769                 }
770         }
771         return strbuf_detach(&result, NULL);
772 }
773
774 static char *get_first_line(char *txt)
775 {
776         char *t = xstrdup(txt);
777         char *p = strchr(t, '\n');
778         if (p)
779                 *p = '\0';
780         return t;
781 }
782
783 static void print_repo(FILE *f, struct cgit_repo *repo)
784 {
785         struct string_list_item *item;
786         fprintf(f, "repo.url=%s\n", repo->url);
787         fprintf(f, "repo.name=%s\n", repo->name);
788         fprintf(f, "repo.path=%s\n", repo->path);
789         if (repo->owner)
790                 fprintf(f, "repo.owner=%s\n", repo->owner);
791         if (repo->desc) {
792                 char *tmp = get_first_line(repo->desc);
793                 fprintf(f, "repo.desc=%s\n", tmp);
794                 free(tmp);
795         }
796         for_each_string_list_item(item, &repo->readme) {
797                 if (item->util)
798                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
799                 else
800                         fprintf(f, "repo.readme=%s\n", item->string);
801         }
802         if (repo->defbranch)
803                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
804         if (repo->extra_head_content)
805                 fprintf(f, "repo.extra-head-content=%s\n", repo->extra_head_content);
806         if (repo->module_link)
807                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
808         if (repo->section)
809                 fprintf(f, "repo.section=%s\n", repo->section);
810         if (repo->homepage)
811                 fprintf(f, "repo.homepage=%s\n", repo->homepage);
812         if (repo->clone_url)
813                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
814         fprintf(f, "repo.enable-blame=%d\n",
815                 repo->enable_blame);
816         fprintf(f, "repo.enable-commit-graph=%d\n",
817                 repo->enable_commit_graph);
818         fprintf(f, "repo.enable-log-filecount=%d\n",
819                 repo->enable_log_filecount);
820         fprintf(f, "repo.enable-log-linecount=%d\n",
821                 repo->enable_log_linecount);
822         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
823                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
824         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
825                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
826         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
827                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
828         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
829                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
830         if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
831                 cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
832         if (repo->snapshots != ctx.cfg.snapshots) {
833                 char *tmp = build_snapshot_setting(repo->snapshots);
834                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
835                 free(tmp);
836         }
837         if (repo->snapshot_prefix)
838                 fprintf(f, "repo.snapshot-prefix=%s\n", repo->snapshot_prefix);
839         if (repo->max_stats != ctx.cfg.max_stats)
840                 fprintf(f, "repo.max-stats=%s\n",
841                         cgit_find_stats_periodname(repo->max_stats));
842         if (repo->logo)
843                 fprintf(f, "repo.logo=%s\n", repo->logo);
844         if (repo->logo_link)
845                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
846         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
847         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
848         fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
849         if (repo->branch_sort == 1)
850                 fprintf(f, "repo.branch-sort=age\n");
851         if (repo->commit_sort) {
852                 if (repo->commit_sort == 1)
853                         fprintf(f, "repo.commit-sort=date\n");
854                 else if (repo->commit_sort == 2)
855                         fprintf(f, "repo.commit-sort=topo\n");
856         }
857         fprintf(f, "repo.hide=%d\n", repo->hide);
858         fprintf(f, "repo.ignore=%d\n", repo->ignore);
859         fprintf(f, "\n");
860 }
861
862 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
863 {
864         int i;
865
866         for (i = start; i < list->count; i++)
867                 print_repo(f, &list->repos[i]);
868 }
869
870 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
871  * and return 0 on success.
872  */
873 static int generate_cached_repolist(const char *path, const char *cached_rc)
874 {
875         struct strbuf locked_rc = STRBUF_INIT;
876         int result = 0;
877         int idx;
878         FILE *f;
879
880         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
881         f = fopen(locked_rc.buf, "wx");
882         if (!f) {
883                 /* Inform about the error unless the lockfile already existed,
884                  * since that only means we've got concurrent requests.
885                  */
886                 result = errno;
887                 if (result != EEXIST)
888                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
889                                 locked_rc.buf, strerror(result), result);
890                 goto out;
891         }
892         idx = cgit_repolist.count;
893         if (ctx.cfg.project_list)
894                 scan_projects(path, ctx.cfg.project_list, repo_config);
895         else
896                 scan_tree(path, repo_config);
897         print_repolist(f, &cgit_repolist, idx);
898         if (rename(locked_rc.buf, cached_rc))
899                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
900                         locked_rc.buf, cached_rc, strerror(errno), errno);
901         fclose(f);
902 out:
903         strbuf_release(&locked_rc);
904         return result;
905 }
906
907 static void process_cached_repolist(const char *path)
908 {
909         struct stat st;
910         struct strbuf cached_rc = STRBUF_INIT;
911         time_t age;
912         unsigned long hash;
913
914         hash = hash_str(path);
915         if (ctx.cfg.project_list)
916                 hash += hash_str(ctx.cfg.project_list);
917         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
918
919         if (stat(cached_rc.buf, &st)) {
920                 /* Nothing is cached, we need to scan without forking. And
921                  * if we fail to generate a cached repolist, we need to
922                  * invoke scan_tree manually.
923                  */
924                 if (generate_cached_repolist(path, cached_rc.buf)) {
925                         if (ctx.cfg.project_list)
926                                 scan_projects(path, ctx.cfg.project_list,
927                                               repo_config);
928                         else
929                                 scan_tree(path, repo_config);
930                 }
931                 goto out;
932         }
933
934         parse_configfile(cached_rc.buf, config_cb);
935
936         /* If the cached configfile hasn't expired, lets exit now */
937         age = time(NULL) - st.st_mtime;
938         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
939                 goto out;
940
941         /* The cached repolist has been parsed, but it was old. So lets
942          * rescan the specified path and generate a new cached repolist
943          * in a child-process to avoid latency for the current request.
944          */
945         if (fork())
946                 goto out;
947
948         exit(generate_cached_repolist(path, cached_rc.buf));
949 out:
950         strbuf_release(&cached_rc);
951 }
952
953 static void cgit_parse_args(int argc, const char **argv)
954 {
955         int i;
956         const char *arg;
957         int scan = 0;
958
959         for (i = 1; i < argc; i++) {
960                 if (!strcmp(argv[i], "--version")) {
961                         printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
962 #ifdef NO_LUA
963                         printf("[-] ");
964 #else
965                         printf("[+] ");
966 #endif
967                         printf("Lua scripting\n");
968 #ifndef HAVE_LINUX_SENDFILE
969                         printf("[-] ");
970 #else
971                         printf("[+] ");
972 #endif
973                         printf("Linux sendfile() usage\n");
974
975                         exit(0);
976                 }
977                 if (skip_prefix(argv[i], "--cache=", &arg)) {
978                         ctx.cfg.cache_root = xstrdup(arg);
979                 } else if (!strcmp(argv[i], "--nohttp")) {
980                         ctx.env.no_http = "1";
981                 } else if (skip_prefix(argv[i], "--query=", &arg)) {
982                         ctx.qry.raw = xstrdup(arg);
983                 } else if (skip_prefix(argv[i], "--repo=", &arg)) {
984                         ctx.qry.repo = xstrdup(arg);
985                 } else if (skip_prefix(argv[i], "--page=", &arg)) {
986                         ctx.qry.page = xstrdup(arg);
987                 } else if (skip_prefix(argv[i], "--head=", &arg)) {
988                         ctx.qry.head = xstrdup(arg);
989                         ctx.qry.has_symref = 1;
990                 } else if (skip_prefix(argv[i], "--sha1=", &arg)) {
991                         ctx.qry.sha1 = xstrdup(arg);
992                         ctx.qry.has_sha1 = 1;
993                 } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
994                         ctx.qry.ofs = atoi(arg);
995                 } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
996                            skip_prefix(argv[i], "--scan-path=", &arg)) {
997                         /*
998                          * HACK: The global snapshot bit mask defines the set
999                          * of allowed snapshot formats, but the config file
1000                          * hasn't been parsed yet so the mask is currently 0.
1001                          * By setting all bits high before scanning we make
1002                          * sure that any in-repo cgitrc snapshot setting is
1003                          * respected by scan_tree().
1004                          *
1005                          * NOTE: We assume that there aren't more than 8
1006                          * different snapshot formats supported by cgit...
1007                          */
1008                         ctx.cfg.snapshots = 0xFF;
1009                         scan++;
1010                         scan_tree(arg, repo_config);
1011                 }
1012         }
1013         if (scan) {
1014                 qsort(cgit_repolist.repos, cgit_repolist.count,
1015                         sizeof(struct cgit_repo), cmp_repos);
1016                 print_repolist(stdout, &cgit_repolist, 0);
1017                 exit(0);
1018         }
1019 }
1020
1021 static int calc_ttl(void)
1022 {
1023         if (!ctx.repo)
1024                 return ctx.cfg.cache_root_ttl;
1025
1026         if (!ctx.qry.page)
1027                 return ctx.cfg.cache_repo_ttl;
1028
1029         if (!strcmp(ctx.qry.page, "about"))
1030                 return ctx.cfg.cache_about_ttl;
1031
1032         if (!strcmp(ctx.qry.page, "snapshot"))
1033                 return ctx.cfg.cache_snapshot_ttl;
1034
1035         if (ctx.qry.has_sha1)
1036                 return ctx.cfg.cache_static_ttl;
1037
1038         if (ctx.qry.has_symref)
1039                 return ctx.cfg.cache_dynamic_ttl;
1040
1041         return ctx.cfg.cache_repo_ttl;
1042 }
1043
1044 int cmd_main(int argc, const char **argv)
1045 {
1046         const char *path;
1047         int err, ttl;
1048
1049         cgit_init_filters();
1050         atexit(cgit_cleanup_filters);
1051
1052         prepare_context();
1053         cgit_repolist.length = 0;
1054         cgit_repolist.count = 0;
1055         cgit_repolist.repos = NULL;
1056
1057         cgit_parse_args(argc, argv);
1058         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
1059         ctx.repo = NULL;
1060         http_parse_querystring(ctx.qry.raw, querystring_cb);
1061
1062         /* If virtual-root isn't specified in cgitrc, lets pretend
1063          * that virtual-root equals SCRIPT_NAME, minus any possibly
1064          * trailing slashes.
1065          */
1066         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
1067                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
1068
1069         /* If no url parameter is specified on the querystring, lets
1070          * use PATH_INFO as url. This allows cgit to work with virtual
1071          * urls without the need for rewriterules in the webserver (as
1072          * long as PATH_INFO is included in the cache lookup key).
1073          */
1074         path = ctx.env.path_info;
1075         if (!ctx.qry.url && path) {
1076                 if (path[0] == '/')
1077                         path++;
1078                 ctx.qry.url = xstrdup(path);
1079                 if (ctx.qry.raw) {
1080                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
1081                         free(ctx.qry.raw);
1082                         ctx.qry.raw = newqry;
1083                 } else
1084                         ctx.qry.raw = xstrdup(ctx.qry.url);
1085                 cgit_parse_url(ctx.qry.url);
1086         }
1087
1088         /* Before we go any further, we set ctx.env.authenticated by checking to see
1089          * if the supplied cookie is valid. All cookies are valid if there is no
1090          * auth_filter. If there is an auth_filter, the filter decides. */
1091         authenticate_cookie();
1092
1093         ttl = calc_ttl();
1094         if (ttl < 0)
1095                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
1096         else
1097                 ctx.page.expires += ttl * 60;
1098         if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
1099                 ctx.cfg.cache_size = 0;
1100         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
1101                             ctx.qry.raw, ttl, process_request);
1102         cgit_cleanup_filters();
1103         if (err)
1104                 cgit_print_error("Error processing page: %s (%d)",
1105                                  strerror(err), err);
1106         return err;
1107 }