cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   4  * Copyright (C) 2010, 2012 Jason A. Donenfeld <Jason@zx2c4.com>
   5  *
   6  * Licensed under GNU General Public License v2
   7  *   (see COPYING for full license text)
   8  */
   9
  10 #include "cgit.h"
  11 #include "cache.h"
  12 #include "cmd.h"
  13 #include "configfile.h"
  14 #include "html.h"
  15 #include "ui-shared.h"
  16 #include "ui-stats.h"
  17 #include "scan-tree.h"
  18
  19 const char *cgit_version = CGIT_VERSION;
  20
  21 void add_mimetype(const char *name, const char *value)
  22 {
  23         struct string_list_item *item;
  24
  25         item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
  26         item->util = xstrdup(value);
  27 }
  28
  29 struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
  30 {
  31         struct cgit_filter *f;
  32         int args_size = 0;
  33         int extra_args;
  34
  35         if (!cmd || !cmd[0])
  36                 return NULL;
  37
  38         switch (filtertype) {
  39                 case SOURCE:
  40                         extra_args = 1;
  41                         break;
  42
  43                 case ABOUT:
  44                 case COMMIT:
  45                 default:
  46                         extra_args = 0;
  47                         break;
  48         }
  49
  50         f = xmalloc(sizeof(struct cgit_filter));
  51         f->cmd = xstrdup(cmd);
  52         args_size = (2 + extra_args) * sizeof(char *);
  53         f->argv = xmalloc(args_size);
  54         memset(f->argv, 0, args_size);
  55         f->argv[0] = f->cmd;
  56         return f;
  57 }
  58
  59 static void process_cached_repolist(const char *path);
  60
  61 void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  62 {
  63         struct string_list_item *item;
  64
  65         if (!strcmp(name, "name"))
  66                 repo->name = xstrdup(value);
  67         else if (!strcmp(name, "clone-url"))
  68                 repo->clone_url = xstrdup(value);
  69         else if (!strcmp(name, "desc"))
  70                 repo->desc = xstrdup(value);
  71         else if (!strcmp(name, "owner"))
  72                 repo->owner = xstrdup(value);
  73         else if (!strcmp(name, "defbranch"))
  74                 repo->defbranch = xstrdup(value);
  75         else if (!strcmp(name, "snapshots"))
  76                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  77         else if (!strcmp(name, "enable-commit-graph"))
  78                 repo->enable_commit_graph = atoi(value);
  79         else if (!strcmp(name, "enable-log-filecount"))
  80                 repo->enable_log_filecount = atoi(value);
  81         else if (!strcmp(name, "enable-log-linecount"))
  82                 repo->enable_log_linecount = atoi(value);
  83         else if (!strcmp(name, "enable-remote-branches"))
  84                 repo->enable_remote_branches = atoi(value);
  85         else if (!strcmp(name, "enable-subject-links"))
  86                 repo->enable_subject_links = atoi(value);
  87         else if (!strcmp(name, "max-stats"))
  88                 repo->max_stats = cgit_find_stats_period(value, NULL);
  89         else if (!strcmp(name, "module-link"))
  90                 repo->module_link= xstrdup(value);
  91         else if (!prefixcmp(name, "module-link.")) {
  92                 item = string_list_append(&repo->submodules, name + 12);
  93                 item->util = xstrdup(value);
  94         } else if (!strcmp(name, "section"))
  95                 repo->section = xstrdup(value);
  96         else if (!strcmp(name, "readme") && value != NULL)
  97                 repo->readme = xstrdup(value);
  98         else if (!strcmp(name, "logo") && value != NULL)
  99                 repo->logo = xstrdup(value);
 100         else if (!strcmp(name, "logo-link") && value != NULL)
 101                 repo->logo_link = xstrdup(value);
 102         else if (ctx.cfg.enable_filter_overrides) {
 103                 if (!strcmp(name, "about-filter"))
 104                         repo->about_filter = new_filter(value, ABOUT);
 105                 else if (!strcmp(name, "commit-filter"))
 106                         repo->commit_filter = new_filter(value, COMMIT);
 107                 else if (!strcmp(name, "source-filter"))
 108                         repo->source_filter = new_filter(value, SOURCE);
 109         }
 110 }
 111
 112 void config_cb(const char *name, const char *value)
 113 {
 114         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 115                 ctx.cfg.section = xstrdup(value);
 116         else if (!strcmp(name, "repo.url"))
 117                 ctx.repo = cgit_add_repo(value);
 118         else if (ctx.repo && !strcmp(name, "repo.path"))
 119                 ctx.repo->path = trim_end(value, '/');
 120         else if (ctx.repo && !prefixcmp(name, "repo."))
 121                 repo_config(ctx.repo, name + 5, value);
 122         else if (!strcmp(name, "readme"))
 123                 ctx.cfg.readme = xstrdup(value);
 124         else if (!strcmp(name, "root-title"))
 125                 ctx.cfg.root_title = xstrdup(value);
 126         else if (!strcmp(name, "root-desc"))
 127                 ctx.cfg.root_desc = xstrdup(value);
 128         else if (!strcmp(name, "root-readme"))
 129                 ctx.cfg.root_readme = xstrdup(value);
 130         else if (!strcmp(name, "css"))
 131                 ctx.cfg.css = xstrdup(value);
 132         else if (!strcmp(name, "favicon"))
 133                 ctx.cfg.favicon = xstrdup(value);
 134         else if (!strcmp(name, "footer"))
 135                 ctx.cfg.footer = xstrdup(value);
 136         else if (!strcmp(name, "head-include"))
 137                 ctx.cfg.head_include = xstrdup(value);
 138         else if (!strcmp(name, "header"))
 139                 ctx.cfg.header = xstrdup(value);
 140         else if (!strcmp(name, "logo"))
 141                 ctx.cfg.logo = xstrdup(value);
 142         else if (!strcmp(name, "index-header"))
 143                 ctx.cfg.index_header = xstrdup(value);
 144         else if (!strcmp(name, "index-info"))
 145                 ctx.cfg.index_info = 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 = trim_end(value, '/');
 154                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
 155                         ctx.cfg.virtual_root = "";
 156         } else if (!strcmp(name, "nocache"))
 157                 ctx.cfg.nocache = atoi(value);
 158         else if (!strcmp(name, "noplainemail"))
 159                 ctx.cfg.noplainemail = atoi(value);
 160         else if (!strcmp(name, "noheader"))
 161                 ctx.cfg.noheader = atoi(value);
 162         else if (!strcmp(name, "snapshots"))
 163                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 164         else if (!strcmp(name, "enable-filter-overrides"))
 165                 ctx.cfg.enable_filter_overrides = atoi(value);
 166         else if (!strcmp(name, "enable-http-clone"))
 167                 ctx.cfg.enable_http_clone = atoi(value);
 168         else if (!strcmp(name, "enable-index-links"))
 169                 ctx.cfg.enable_index_links = atoi(value);
 170         else if (!strcmp(name, "enable-commit-graph"))
 171                 ctx.cfg.enable_commit_graph = atoi(value);
 172         else if (!strcmp(name, "enable-log-filecount"))
 173                 ctx.cfg.enable_log_filecount = atoi(value);
 174         else if (!strcmp(name, "enable-log-linecount"))
 175                 ctx.cfg.enable_log_linecount = atoi(value);
 176         else if (!strcmp(name, "enable-remote-branches"))
 177                 ctx.cfg.enable_remote_branches = atoi(value);
 178         else if (!strcmp(name, "enable-subject-links"))
 179                 ctx.cfg.enable_subject_links = atoi(value);
 180         else if (!strcmp(name, "enable-tree-linenumbers"))
 181                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 182         else if (!strcmp(name, "enable-git-config"))
 183                 ctx.cfg.enable_git_config = atoi(value);
 184         else if (!strcmp(name, "max-stats"))
 185                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 186         else if (!strcmp(name, "cache-size"))
 187                 ctx.cfg.cache_size = atoi(value);
 188         else if (!strcmp(name, "cache-root"))
 189                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 190         else if (!strcmp(name, "cache-root-ttl"))
 191                 ctx.cfg.cache_root_ttl = atoi(value);
 192         else if (!strcmp(name, "cache-repo-ttl"))
 193                 ctx.cfg.cache_repo_ttl = atoi(value);
 194         else if (!strcmp(name, "cache-scanrc-ttl"))
 195                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 196         else if (!strcmp(name, "cache-static-ttl"))
 197                 ctx.cfg.cache_static_ttl = atoi(value);
 198         else if (!strcmp(name, "cache-dynamic-ttl"))
 199                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 200         else if (!strcmp(name, "case-sensitive-sort"))
 201                 ctx.cfg.case_sensitive_sort = atoi(value);
 202         else if (!strcmp(name, "about-filter"))
 203                 ctx.cfg.about_filter = new_filter(value, ABOUT);
 204         else if (!strcmp(name, "commit-filter"))
 205                 ctx.cfg.commit_filter = new_filter(value, COMMIT);
 206         else if (!strcmp(name, "embedded"))
 207                 ctx.cfg.embedded = atoi(value);
 208         else if (!strcmp(name, "max-atom-items"))
 209                 ctx.cfg.max_atom_items = atoi(value);
 210         else if (!strcmp(name, "max-message-length"))
 211                 ctx.cfg.max_msg_len = atoi(value);
 212         else if (!strcmp(name, "max-repodesc-length"))
 213                 ctx.cfg.max_repodesc_len = atoi(value);
 214         else if (!strcmp(name, "max-blob-size"))
 215                 ctx.cfg.max_blob_size = atoi(value);
 216         else if (!strcmp(name, "max-repo-count"))
 217                 ctx.cfg.max_repo_count = atoi(value);
 218         else if (!strcmp(name, "max-commit-count"))
 219                 ctx.cfg.max_commit_count = atoi(value);
 220         else if (!strcmp(name, "project-list"))
 221                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 222         else if (!strcmp(name, "scan-path"))
 223                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 224                         process_cached_repolist(expand_macros(value));
 225                 else if (ctx.cfg.project_list)
 226                         scan_projects(expand_macros(value),
 227                                       ctx.cfg.project_list, repo_config);
 228                 else
 229                         scan_tree(expand_macros(value), repo_config);
 230         else if (!strcmp(name, "scan-hidden-path"))
 231                 ctx.cfg.scan_hidden_path = atoi(value);
 232         else if (!strcmp(name, "section-from-path"))
 233                 ctx.cfg.section_from_path = atoi(value);
 234         else if (!strcmp(name, "repository-sort"))
 235                 ctx.cfg.repository_sort = xstrdup(value);
 236         else if (!strcmp(name, "section-sort"))
 237                 ctx.cfg.section_sort = atoi(value);
 238         else if (!strcmp(name, "source-filter"))
 239                 ctx.cfg.source_filter = new_filter(value, SOURCE);
 240         else if (!strcmp(name, "summary-log"))
 241                 ctx.cfg.summary_log = atoi(value);
 242         else if (!strcmp(name, "summary-branches"))
 243                 ctx.cfg.summary_branches = atoi(value);
 244         else if (!strcmp(name, "summary-tags"))
 245                 ctx.cfg.summary_tags = atoi(value);
 246         else if (!strcmp(name, "side-by-side-diffs"))
 247                 ctx.cfg.ssdiff = atoi(value);
 248         else if (!strcmp(name, "agefile"))
 249                 ctx.cfg.agefile = xstrdup(value);
 250         else if (!strcmp(name, "mimetype-file"))
 251                 ctx.cfg.mimetype_file = xstrdup(value);
 252         else if (!strcmp(name, "renamelimit"))
 253                 ctx.cfg.renamelimit = atoi(value);
 254         else if (!strcmp(name, "remove-suffix"))
 255                 ctx.cfg.remove_suffix = atoi(value);
 256         else if (!strcmp(name, "robots"))
 257                 ctx.cfg.robots = xstrdup(value);
 258         else if (!strcmp(name, "clone-prefix"))
 259                 ctx.cfg.clone_prefix = xstrdup(value);
 260         else if (!strcmp(name, "clone-url"))
 261                 ctx.cfg.clone_url = xstrdup(value);
 262         else if (!strcmp(name, "local-time"))
 263                 ctx.cfg.local_time = atoi(value);
 264         else if (!prefixcmp(name, "mimetype."))
 265                 add_mimetype(name + 9, value);
 266         else if (!strcmp(name, "include"))
 267                 parse_configfile(expand_macros(value), config_cb);
 268 }
 269
 270 static void querystring_cb(const char *name, const char *value)
 271 {
 272         if (!value)
 273                 value = "";
 274
 275         if (!strcmp(name,"r")) {
 276                 ctx.qry.repo = xstrdup(value);
 277                 ctx.repo = cgit_get_repoinfo(value);
 278         } else if (!strcmp(name, "p")) {
 279                 ctx.qry.page = xstrdup(value);
 280         } else if (!strcmp(name, "url")) {
 281                 if (*value == '/')
 282                         value++;
 283                 ctx.qry.url = xstrdup(value);
 284                 cgit_parse_url(value);
 285         } else if (!strcmp(name, "qt")) {
 286                 ctx.qry.grep = xstrdup(value);
 287         } else if (!strcmp(name, "q")) {
 288                 ctx.qry.search = xstrdup(value);
 289         } else if (!strcmp(name, "h")) {
 290                 ctx.qry.head = xstrdup(value);
 291                 ctx.qry.has_symref = 1;
 292         } else if (!strcmp(name, "id")) {
 293                 ctx.qry.sha1 = xstrdup(value);
 294                 ctx.qry.has_sha1 = 1;
 295         } else if (!strcmp(name, "id2")) {
 296                 ctx.qry.sha2 = xstrdup(value);
 297                 ctx.qry.has_sha1 = 1;
 298         } else if (!strcmp(name, "ofs")) {
 299                 ctx.qry.ofs = atoi(value);
 300         } else if (!strcmp(name, "path")) {
 301                 ctx.qry.path = trim_end(value, '/');
 302         } else if (!strcmp(name, "name")) {
 303                 ctx.qry.name = xstrdup(value);
 304         } else if (!strcmp(name, "mimetype")) {
 305                 ctx.qry.mimetype = xstrdup(value);
 306         } else if (!strcmp(name, "s")){
 307                 ctx.qry.sort = xstrdup(value);
 308         } else if (!strcmp(name, "showmsg")) {
 309                 ctx.qry.showmsg = atoi(value);
 310         } else if (!strcmp(name, "period")) {
 311                 ctx.qry.period = xstrdup(value);
 312         } else if (!strcmp(name, "ss")) {
 313                 ctx.qry.ssdiff = atoi(value);
 314                 ctx.qry.has_ssdiff = 1;
 315         } else if (!strcmp(name, "all")) {
 316                 ctx.qry.show_all = atoi(value);
 317         } else if (!strcmp(name, "context")) {
 318                 ctx.qry.context = atoi(value);
 319         } else if (!strcmp(name, "ignorews")) {
 320                 ctx.qry.ignorews = atoi(value);
 321         }
 322 }
 323
 324 char *xstrdupn(const char *str)
 325 {
 326         return (str ? xstrdup(str) : NULL);
 327 }
 328
 329 static void prepare_context(struct cgit_context *ctx)
 330 {
 331         memset(ctx, 0, sizeof(*ctx));
 332         ctx->cfg.agefile = "info/web/last-modified";
 333         ctx->cfg.nocache = 0;
 334         ctx->cfg.cache_size = 0;
 335         ctx->cfg.cache_dynamic_ttl = 5;
 336         ctx->cfg.cache_max_create_time = 5;
 337         ctx->cfg.cache_repo_ttl = 5;
 338         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 339         ctx->cfg.cache_root_ttl = 5;
 340         ctx->cfg.cache_scanrc_ttl = 15;
 341         ctx->cfg.cache_static_ttl = -1;
 342         ctx->cfg.case_sensitive_sort = 1;
 343         ctx->cfg.css = "/cgit.css";
 344         ctx->cfg.logo = "/cgit.png";
 345         ctx->cfg.local_time = 0;
 346         ctx->cfg.enable_http_clone = 1;
 347         ctx->cfg.enable_tree_linenumbers = 1;
 348         ctx->cfg.enable_git_config = 0;
 349         ctx->cfg.max_repo_count = 50;
 350         ctx->cfg.max_commit_count = 50;
 351         ctx->cfg.max_lock_attempts = 5;
 352         ctx->cfg.max_msg_len = 80;
 353         ctx->cfg.max_repodesc_len = 80;
 354         ctx->cfg.max_blob_size = 0;
 355         ctx->cfg.max_stats = 0;
 356         ctx->cfg.project_list = NULL;
 357         ctx->cfg.renamelimit = -1;
 358         ctx->cfg.remove_suffix = 0;
 359         ctx->cfg.robots = "index, nofollow";
 360         ctx->cfg.root_title = "Git repository browser";
 361         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 362         ctx->cfg.scan_hidden_path = 0;
 363         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 364         ctx->cfg.section = "";
 365         ctx->cfg.repository_sort = "name";
 366         ctx->cfg.section_sort = 1;
 367         ctx->cfg.summary_branches = 10;
 368         ctx->cfg.summary_log = 10;
 369         ctx->cfg.summary_tags = 10;
 370         ctx->cfg.max_atom_items = 10;
 371         ctx->cfg.ssdiff = 0;
 372         ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
 373         ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
 374         ctx->env.https = xstrdupn(getenv("HTTPS"));
 375         ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
 376         ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
 377         ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
 378         ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
 379         ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
 380         ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
 381         ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
 382         ctx->page.mimetype = "text/html";
 383         ctx->page.charset = PAGE_ENCODING;
 384         ctx->page.filename = NULL;
 385         ctx->page.size = 0;
 386         ctx->page.modified = time(NULL);
 387         ctx->page.expires = ctx->page.modified;
 388         ctx->page.etag = NULL;
 389         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 390         if (ctx->env.script_name)
 391                 ctx->cfg.script_name = ctx->env.script_name;
 392         if (ctx->env.query_string)
 393                 ctx->qry.raw = ctx->env.query_string;
 394         if (!ctx->env.cgit_config)
 395                 ctx->env.cgit_config = CGIT_CONFIG;
 396 }
 397
 398 struct refmatch {
 399         char *req_ref;
 400         char *first_ref;
 401         int match;
 402 };
 403
 404 int find_current_ref(const char *refname, const unsigned char *sha1,
 405                      int flags, void *cb_data)
 406 {
 407         struct refmatch *info;
 408
 409         info = (struct refmatch *)cb_data;
 410         if (!strcmp(refname, info->req_ref))
 411                 info->match = 1;
 412         if (!info->first_ref)
 413                 info->first_ref = xstrdup(refname);
 414         return info->match;
 415 }
 416
 417 char *find_default_branch(struct cgit_repo *repo)
 418 {
 419         struct refmatch info;
 420         char *ref;
 421
 422         info.req_ref = repo->defbranch;
 423         info.first_ref = NULL;
 424         info.match = 0;
 425         for_each_branch_ref(find_current_ref, &info);
 426         if (info.match)
 427                 ref = info.req_ref;
 428         else
 429                 ref = info.first_ref;
 430         if (ref)
 431                 ref = xstrdup(ref);
 432         return ref;
 433 }
 434
 435 static char *guess_defbranch(const char *repo_path)
 436 {
 437         const char *ref;
 438         unsigned char sha1[20];
 439
 440         ref = resolve_ref("HEAD", sha1, 0, NULL);
 441         if (!ref || prefixcmp(ref, "refs/heads/"))
 442                 return "master";
 443         return xstrdup(ref + 11);
 444 }
 445
 446 static int prepare_repo_cmd(struct cgit_context *ctx)
 447 {
 448         char *tmp;
 449         unsigned char sha1[20];
 450         int nongit = 0;
 451         int rc;
 452
 453         setenv("GIT_DIR", ctx->repo->path, 1);
 454         setup_git_directory_gently(&nongit);
 455         if (nongit) {
 456                 rc = errno;
 457                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 458                                       "config error");
 459                 tmp = fmt("Failed to open %s: %s",
 460                           ctx->repo->name,
 461                           rc ? strerror(rc) : "Not a valid git repository");
 462                 ctx->repo = NULL;
 463                 cgit_print_http_headers(ctx);
 464                 cgit_print_docstart(ctx);
 465                 cgit_print_pageheader(ctx);
 466                 cgit_print_error(tmp);
 467                 cgit_print_docend();
 468                 return 1;
 469         }
 470         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 471
 472         if (!ctx->repo->defbranch)
 473                 ctx->repo->defbranch = guess_defbranch(ctx->repo->path);
 474
 475         if (!ctx->qry.head) {
 476                 ctx->qry.nohead = 1;
 477                 ctx->qry.head = find_default_branch(ctx->repo);
 478         }
 479
 480         if (!ctx->qry.head) {
 481                 cgit_print_http_headers(ctx);
 482                 cgit_print_docstart(ctx);
 483                 cgit_print_pageheader(ctx);
 484                 cgit_print_error("Repository seems to be empty");
 485                 cgit_print_docend();
 486                 return 1;
 487         }
 488
 489         if (get_sha1(ctx->qry.head, sha1)) {
 490                 tmp = xstrdup(ctx->qry.head);
 491                 ctx->qry.head = ctx->repo->defbranch;
 492                 ctx->page.status = 404;
 493                 ctx->page.statusmsg = "Not found";
 494                 cgit_print_http_headers(ctx);
 495                 cgit_print_docstart(ctx);
 496                 cgit_print_pageheader(ctx);
 497                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 498                 cgit_print_docend();
 499                 return 1;
 500         }
 501         sort_string_list(&ctx->repo->submodules);
 502         cgit_prepare_repo_env(ctx->repo);
 503         return 0;
 504 }
 505
 506 static void process_request(void *cbdata)
 507 {
 508         struct cgit_context *ctx = cbdata;
 509         struct cgit_cmd *cmd;
 510
 511         cmd = cgit_get_cmd(ctx);
 512         if (!cmd) {
 513                 ctx->page.title = "cgit error";
 514                 ctx->page.status = 404;
 515                 ctx->page.statusmsg = "Not found";
 516                 cgit_print_http_headers(ctx);
 517                 cgit_print_docstart(ctx);
 518                 cgit_print_pageheader(ctx);
 519                 cgit_print_error("Invalid request");
 520                 cgit_print_docend();
 521                 return;
 522         }
 523
 524         if (!ctx->cfg.enable_http_clone && cmd->is_clone) {
 525                 html_status(404, "Not found", 0);
 526                 return;
 527         }
 528
 529         /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
 530          * in-project path limit to be made available at ctx->qry.vpath.
 531          * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
 532          */
 533         ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
 534
 535         if (cmd->want_repo && !ctx->repo) {
 536                 cgit_print_http_headers(ctx);
 537                 cgit_print_docstart(ctx);
 538                 cgit_print_pageheader(ctx);
 539                 cgit_print_error(fmt("No repository selected"));
 540                 cgit_print_docend();
 541                 return;
 542         }
 543
 544         if (ctx->repo && prepare_repo_cmd(ctx))
 545                 return;
 546
 547         if (cmd->want_layout) {
 548                 cgit_print_http_headers(ctx);
 549                 cgit_print_docstart(ctx);
 550                 cgit_print_pageheader(ctx);
 551         }
 552
 553         cmd->fn(ctx);
 554
 555         if (cmd->want_layout)
 556                 cgit_print_docend();
 557 }
 558
 559 int cmp_repos(const void *a, const void *b)
 560 {
 561         const struct cgit_repo *ra = a, *rb = b;
 562         return strcmp(ra->url, rb->url);
 563 }
 564
 565 char *build_snapshot_setting(int bitmap)
 566 {
 567         const struct cgit_snapshot_format *f;
 568         char *result = xstrdup("");
 569         char *tmp;
 570         int len;
 571
 572         for (f = cgit_snapshot_formats; f->suffix; f++) {
 573                 if (f->bit & bitmap) {
 574                         tmp = result;
 575                         result = xstrdup(fmt("%s%s ", tmp, f->suffix));
 576                         free(tmp);
 577                 }
 578         }
 579         len = strlen(result);
 580         if (len)
 581                 result[len - 1] = '\0';
 582         return result;
 583 }
 584
 585 char *get_first_line(char *txt)
 586 {
 587         char *t = xstrdup(txt);
 588         char *p = strchr(t, '\n');
 589         if (p)
 590                 *p = '\0';
 591         return t;
 592 }
 593
 594 void print_repo(FILE *f, struct cgit_repo *repo)
 595 {
 596         fprintf(f, "repo.url=%s\n", repo->url);
 597         fprintf(f, "repo.name=%s\n", repo->name);
 598         fprintf(f, "repo.path=%s\n", repo->path);
 599         if (repo->owner)
 600                 fprintf(f, "repo.owner=%s\n", repo->owner);
 601         if (repo->desc) {
 602                 char *tmp = get_first_line(repo->desc);
 603                 fprintf(f, "repo.desc=%s\n", tmp);
 604                 free(tmp);
 605         }
 606         if (repo->readme)
 607                 fprintf(f, "repo.readme=%s\n", repo->readme);
 608         if (repo->defbranch)
 609                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 610         if (repo->module_link)
 611                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 612         if (repo->section)
 613                 fprintf(f, "repo.section=%s\n", repo->section);
 614         if (repo->clone_url)
 615                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 616         fprintf(f, "repo.enable-commit-graph=%d\n",
 617                 repo->enable_commit_graph);
 618         fprintf(f, "repo.enable-log-filecount=%d\n",
 619                 repo->enable_log_filecount);
 620         fprintf(f, "repo.enable-log-linecount=%d\n",
 621                 repo->enable_log_linecount);
 622         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 623                 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
 624         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 625                 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
 626         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 627                 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
 628         if (repo->snapshots != ctx.cfg.snapshots) {
 629                 char *tmp = build_snapshot_setting(repo->snapshots);
 630                 fprintf(f, "repo.snapshots=%s\n", tmp);
 631                 free(tmp);
 632         }
 633         if (repo->max_stats != ctx.cfg.max_stats)
 634                 fprintf(f, "repo.max-stats=%s\n",
 635                         cgit_find_stats_periodname(repo->max_stats));
 636         fprintf(f, "\n");
 637 }
 638
 639 void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 640 {
 641         int i;
 642
 643         for(i = start; i < list->count; i++)
 644                 print_repo(f, &list->repos[i]);
 645 }
 646
 647 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 648  * and return 0 on success.
 649  */
 650 static int generate_cached_repolist(const char *path, const char *cached_rc)
 651 {
 652         char *locked_rc;
 653         int idx;
 654         FILE *f;
 655
 656         locked_rc = xstrdup(fmt("%s.lock", cached_rc));
 657         f = fopen(locked_rc, "wx");
 658         if (!f) {
 659                 /* Inform about the error unless the lockfile already existed,
 660                  * since that only means we've got concurrent requests.
 661                  */
 662                 if (errno != EEXIST)
 663                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 664                                 locked_rc, strerror(errno), errno);
 665                 return errno;
 666         }
 667         idx = cgit_repolist.count;
 668         if (ctx.cfg.project_list)
 669                 scan_projects(path, ctx.cfg.project_list, repo_config);
 670         else
 671                 scan_tree(path, repo_config);
 672         print_repolist(f, &cgit_repolist, idx);
 673         if (rename(locked_rc, cached_rc))
 674                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 675                         locked_rc, cached_rc, strerror(errno), errno);
 676         fclose(f);
 677         return 0;
 678 }
 679
 680 static void process_cached_repolist(const char *path)
 681 {
 682         struct stat st;
 683         char *cached_rc;
 684         time_t age;
 685         unsigned long hash;
 686
 687         hash = hash_str(path);
 688         if (ctx.cfg.project_list)
 689                 hash += hash_str(ctx.cfg.project_list);
 690         cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
 691
 692         if (stat(cached_rc, &st)) {
 693                 /* Nothing is cached, we need to scan without forking. And
 694                  * if we fail to generate a cached repolist, we need to
 695                  * invoke scan_tree manually.
 696                  */
 697                 if (generate_cached_repolist(path, cached_rc)) {
 698                         if (ctx.cfg.project_list)
 699                                 scan_projects(path, ctx.cfg.project_list,
 700                                               repo_config);
 701                         else
 702                                 scan_tree(path, repo_config);
 703                 }
 704                 return;
 705         }
 706
 707         parse_configfile(cached_rc, config_cb);
 708
 709         /* If the cached configfile hasn't expired, lets exit now */
 710         age = time(NULL) - st.st_mtime;
 711         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 712                 return;
 713
 714         /* The cached repolist has been parsed, but it was old. So lets
 715          * rescan the specified path and generate a new cached repolist
 716          * in a child-process to avoid latency for the current request.
 717          */
 718         if (fork())
 719                 return;
 720
 721         exit(generate_cached_repolist(path, cached_rc));
 722 }
 723
 724 static void cgit_parse_args(int argc, const char **argv)
 725 {
 726         int i;
 727         int scan = 0;
 728
 729         for (i = 1; i < argc; i++) {
 730                 if (!strncmp(argv[i], "--cache=", 8)) {
 731                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 732                 }
 733                 if (!strcmp(argv[i], "--nocache")) {
 734                         ctx.cfg.nocache = 1;
 735                 }
 736                 if (!strcmp(argv[i], "--nohttp")) {
 737                         ctx.env.no_http = "1";
 738                 }
 739                 if (!strncmp(argv[i], "--query=", 8)) {
 740                         ctx.qry.raw = xstrdup(argv[i]+8);
 741                 }
 742                 if (!strncmp(argv[i], "--repo=", 7)) {
 743                         ctx.qry.repo = xstrdup(argv[i]+7);
 744                 }
 745                 if (!strncmp(argv[i], "--page=", 7)) {
 746                         ctx.qry.page = xstrdup(argv[i]+7);
 747                 }
 748                 if (!strncmp(argv[i], "--head=", 7)) {
 749                         ctx.qry.head = xstrdup(argv[i]+7);
 750                         ctx.qry.has_symref = 1;
 751                 }
 752                 if (!strncmp(argv[i], "--sha1=", 7)) {
 753                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 754                         ctx.qry.has_sha1 = 1;
 755                 }
 756                 if (!strncmp(argv[i], "--ofs=", 6)) {
 757                         ctx.qry.ofs = atoi(argv[i]+6);
 758                 }
 759                 if (!strncmp(argv[i], "--scan-tree=", 12) ||
 760                     !strncmp(argv[i], "--scan-path=", 12)) {
 761                         /* HACK: the global snapshot bitmask defines the
 762                          * set of allowed snapshot formats, but the config
 763                          * file hasn't been parsed yet so the mask is
 764                          * currently 0. By setting all bits high before
 765                          * scanning we make sure that any in-repo cgitrc
 766                          * snapshot setting is respected by scan_tree().
 767                          * BTW: we assume that there'll never be more than
 768                          * 255 different snapshot formats supported by cgit...
 769                          */
 770                         ctx.cfg.snapshots = 0xFF;
 771                         scan++;
 772                         scan_tree(argv[i] + 12, repo_config);
 773                 }
 774         }
 775         if (scan) {
 776                 qsort(cgit_repolist.repos, cgit_repolist.count,
 777                         sizeof(struct cgit_repo), cmp_repos);
 778                 print_repolist(stdout, &cgit_repolist, 0);
 779                 exit(0);
 780         }
 781 }
 782
 783 static int calc_ttl()
 784 {
 785         if (!ctx.repo)
 786                 return ctx.cfg.cache_root_ttl;
 787
 788         if (!ctx.qry.page)
 789                 return ctx.cfg.cache_repo_ttl;
 790
 791         if (ctx.qry.has_symref)
 792                 return ctx.cfg.cache_dynamic_ttl;
 793
 794         if (ctx.qry.has_sha1)
 795                 return ctx.cfg.cache_static_ttl;
 796
 797         return ctx.cfg.cache_repo_ttl;
 798 }
 799
 800 int main(int argc, const char **argv)
 801 {
 802         const char *path;
 803         char *qry;
 804         int err, ttl;
 805
 806         prepare_context(&ctx);
 807         cgit_repolist.length = 0;
 808         cgit_repolist.count = 0;
 809         cgit_repolist.repos = NULL;
 810
 811         cgit_parse_args(argc, argv);
 812         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
 813         ctx.repo = NULL;
 814         http_parse_querystring(ctx.qry.raw, querystring_cb);
 815
 816         /* If virtual-root isn't specified in cgitrc, lets pretend
 817          * that virtual-root equals SCRIPT_NAME, minus any possibly
 818          * trailing slashes.
 819          */
 820         if (!ctx.cfg.virtual_root && ctx.cfg.script_name) {
 821                 ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
 822                 if (!ctx.cfg.virtual_root)
 823                         ctx.cfg.virtual_root = "";
 824         }
 825
 826         /* If no url parameter is specified on the querystring, lets
 827          * use PATH_INFO as url. This allows cgit to work with virtual
 828          * urls without the need for rewriterules in the webserver (as
 829          * long as PATH_INFO is included in the cache lookup key).
 830          */
 831         path = ctx.env.path_info;
 832         if (!ctx.qry.url && path) {
 833                 if (path[0] == '/')
 834                         path++;
 835                 ctx.qry.url = xstrdup(path);
 836                 if (ctx.qry.raw) {
 837                         qry = ctx.qry.raw;
 838                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 839                         free(qry);
 840                 } else
 841                         ctx.qry.raw = xstrdup(ctx.qry.url);
 842                 cgit_parse_url(ctx.qry.url);
 843         }
 844
 845         ttl = calc_ttl();
 846         ctx.page.expires += ttl*60;
 847         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 848                 ctx.cfg.nocache = 1;
 849         if (ctx.cfg.nocache)
 850                 ctx.cfg.cache_size = 0;
 851         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 852                             ctx.qry.raw, ttl, process_request, &ctx);
 853         if (err)
 854                 cgit_print_error(fmt("Error processing page: %s (%d)",
 855                                      strerror(err), err));
 856         return err;
 857 }