cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   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 "scan-tree.h"
  17
  18 const char *cgit_version = CGIT_VERSION;
  19
  20 void add_mimetype(const char *name, const char *value)
  21 {
  22         struct string_list_item *item;
  23
  24         item = string_list_insert(xstrdup(name), &ctx.cfg.mimetypes);
  25         item->util = xstrdup(value);
  26 }
  27
  28 struct cgit_filter *new_filter(const char *cmd, int extra_args)
  29 {
  30         struct cgit_filter *f;
  31
  32         if (!cmd || !cmd[0])
  33                 return NULL;
  34
  35         f = xmalloc(sizeof(struct cgit_filter));
  36         f->cmd = xstrdup(cmd);
  37         f->argv = xmalloc((2 + extra_args) * sizeof(char *));
  38         f->argv[0] = f->cmd;
  39         f->argv[1] = NULL;
  40         return f;
  41 }
  42
  43 static void process_cached_repolist(const char *path);
  44
  45 void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  46 {
  47         if (!strcmp(name, "name"))
  48                 repo->name = xstrdup(value);
  49         else if (!strcmp(name, "clone-url"))
  50                 repo->clone_url = xstrdup(value);
  51         else if (!strcmp(name, "desc"))
  52                 repo->desc = xstrdup(value);
  53         else if (!strcmp(name, "owner"))
  54                 repo->owner = xstrdup(value);
  55         else if (!strcmp(name, "defbranch"))
  56                 repo->defbranch = xstrdup(value);
  57         else if (!strcmp(name, "snapshots"))
  58                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  59         else if (!strcmp(name, "enable-log-filecount"))
  60                 repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
  61         else if (!strcmp(name, "enable-log-linecount"))
  62                 repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
  63         else if (!strcmp(name, "max-stats"))
  64                 repo->max_stats = cgit_find_stats_period(value, NULL);
  65         else if (!strcmp(name, "module-link"))
  66                 repo->module_link= xstrdup(value);
  67         else if (!strcmp(name, "section"))
  68                 repo->section = xstrdup(value);
  69         else if (!strcmp(name, "about-filter"))
  70                 repo->about_filter = new_filter(value, 0);
  71         else if (!strcmp(name, "commit-filter"))
  72                 repo->commit_filter = new_filter(value, 0);
  73         else if (!strcmp(name, "source-filter"))
  74                 repo->source_filter = new_filter(value, 1);
  75         else if (!strcmp(name, "readme") && value != NULL) {
  76                 if (*value == '/')
  77                         ctx.repo->readme = xstrdup(value);
  78                 else
  79                         ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
  80         }
  81 }
  82
  83 void config_cb(const char *name, const char *value)
  84 {
  85         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
  86                 ctx.cfg.section = xstrdup(value);
  87         else if (!strcmp(name, "repo.url"))
  88                 ctx.repo = cgit_add_repo(value);
  89         else if (ctx.repo && !strcmp(name, "repo.path"))
  90                 ctx.repo->path = trim_end(value, '/');
  91         else if (ctx.repo && !prefixcmp(name, "repo."))
  92                 repo_config(ctx.repo, name + 5, value);
  93         else if (!strcmp(name, "root-title"))
  94                 ctx.cfg.root_title = xstrdup(value);
  95         else if (!strcmp(name, "root-desc"))
  96                 ctx.cfg.root_desc = xstrdup(value);
  97         else if (!strcmp(name, "root-readme"))
  98                 ctx.cfg.root_readme = xstrdup(value);
  99         else if (!strcmp(name, "css"))
 100                 ctx.cfg.css = xstrdup(value);
 101         else if (!strcmp(name, "favicon"))
 102                 ctx.cfg.favicon = xstrdup(value);
 103         else if (!strcmp(name, "footer"))
 104                 ctx.cfg.footer = xstrdup(value);
 105         else if (!strcmp(name, "head-include"))
 106                 ctx.cfg.head_include = xstrdup(value);
 107         else if (!strcmp(name, "header"))
 108                 ctx.cfg.header = xstrdup(value);
 109         else if (!strcmp(name, "logo"))
 110                 ctx.cfg.logo = xstrdup(value);
 111         else if (!strcmp(name, "index-header"))
 112                 ctx.cfg.index_header = xstrdup(value);
 113         else if (!strcmp(name, "index-info"))
 114                 ctx.cfg.index_info = xstrdup(value);
 115         else if (!strcmp(name, "logo-link"))
 116                 ctx.cfg.logo_link = xstrdup(value);
 117         else if (!strcmp(name, "module-link"))
 118                 ctx.cfg.module_link = xstrdup(value);
 119         else if (!strcmp(name, "virtual-root")) {
 120                 ctx.cfg.virtual_root = trim_end(value, '/');
 121                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
 122                         ctx.cfg.virtual_root = "";
 123         } else if (!strcmp(name, "nocache"))
 124                 ctx.cfg.nocache = atoi(value);
 125         else if (!strcmp(name, "noplainemail"))
 126                 ctx.cfg.noplainemail = atoi(value);
 127         else if (!strcmp(name, "noheader"))
 128                 ctx.cfg.noheader = atoi(value);
 129         else if (!strcmp(name, "snapshots"))
 130                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 131         else if (!strcmp(name, "enable-index-links"))
 132                 ctx.cfg.enable_index_links = atoi(value);
 133         else if (!strcmp(name, "enable-log-filecount"))
 134                 ctx.cfg.enable_log_filecount = atoi(value);
 135         else if (!strcmp(name, "enable-log-linecount"))
 136                 ctx.cfg.enable_log_linecount = atoi(value);
 137         else if (!strcmp(name, "max-stats"))
 138                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 139         else if (!strcmp(name, "cache-size"))
 140                 ctx.cfg.cache_size = atoi(value);
 141         else if (!strcmp(name, "cache-root"))
 142                 ctx.cfg.cache_root = xstrdup(value);
 143         else if (!strcmp(name, "cache-root-ttl"))
 144                 ctx.cfg.cache_root_ttl = atoi(value);
 145         else if (!strcmp(name, "cache-repo-ttl"))
 146                 ctx.cfg.cache_repo_ttl = atoi(value);
 147         else if (!strcmp(name, "cache-scanrc-ttl"))
 148                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 149         else if (!strcmp(name, "cache-static-ttl"))
 150                 ctx.cfg.cache_static_ttl = atoi(value);
 151         else if (!strcmp(name, "cache-dynamic-ttl"))
 152                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 153         else if (!strcmp(name, "about-filter"))
 154                 ctx.cfg.about_filter = new_filter(value, 0);
 155         else if (!strcmp(name, "commit-filter"))
 156                 ctx.cfg.commit_filter = new_filter(value, 0);
 157         else if (!strcmp(name, "embedded"))
 158                 ctx.cfg.embedded = atoi(value);
 159         else if (!strcmp(name, "max-message-length"))
 160                 ctx.cfg.max_msg_len = atoi(value);
 161         else if (!strcmp(name, "max-repodesc-length"))
 162                 ctx.cfg.max_repodesc_len = atoi(value);
 163         else if (!strcmp(name, "max-repo-count"))
 164                 ctx.cfg.max_repo_count = atoi(value);
 165         else if (!strcmp(name, "max-commit-count"))
 166                 ctx.cfg.max_commit_count = atoi(value);
 167         else if (!strcmp(name, "scan-path"))
 168                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 169                         process_cached_repolist(value);
 170                 else
 171                         scan_tree(value, repo_config);
 172         else if (!strcmp(name, "source-filter"))
 173                 ctx.cfg.source_filter = new_filter(value, 1);
 174         else if (!strcmp(name, "summary-log"))
 175                 ctx.cfg.summary_log = atoi(value);
 176         else if (!strcmp(name, "summary-branches"))
 177                 ctx.cfg.summary_branches = atoi(value);
 178         else if (!strcmp(name, "summary-tags"))
 179                 ctx.cfg.summary_tags = atoi(value);
 180         else if (!strcmp(name, "agefile"))
 181                 ctx.cfg.agefile = xstrdup(value);
 182         else if (!strcmp(name, "renamelimit"))
 183                 ctx.cfg.renamelimit = atoi(value);
 184         else if (!strcmp(name, "robots"))
 185                 ctx.cfg.robots = xstrdup(value);
 186         else if (!strcmp(name, "clone-prefix"))
 187                 ctx.cfg.clone_prefix = xstrdup(value);
 188         else if (!strcmp(name, "local-time"))
 189                 ctx.cfg.local_time = atoi(value);
 190         else if (!prefixcmp(name, "mimetype."))
 191                 add_mimetype(name + 9, value);
 192         else if (!strcmp(name, "include"))
 193                 parse_configfile(value, config_cb);
 194 }
 195
 196 static void querystring_cb(const char *name, const char *value)
 197 {
 198         if (!value)
 199                 value = "";
 200
 201         if (!strcmp(name,"r")) {
 202                 ctx.qry.repo = xstrdup(value);
 203                 ctx.repo = cgit_get_repoinfo(value);
 204         } else if (!strcmp(name, "p")) {
 205                 ctx.qry.page = xstrdup(value);
 206         } else if (!strcmp(name, "url")) {
 207                 ctx.qry.url = xstrdup(value);
 208                 cgit_parse_url(value);
 209         } else if (!strcmp(name, "qt")) {
 210                 ctx.qry.grep = xstrdup(value);
 211         } else if (!strcmp(name, "q")) {
 212                 ctx.qry.search = xstrdup(value);
 213         } else if (!strcmp(name, "h")) {
 214                 ctx.qry.head = xstrdup(value);
 215                 ctx.qry.has_symref = 1;
 216         } else if (!strcmp(name, "id")) {
 217                 ctx.qry.sha1 = xstrdup(value);
 218                 ctx.qry.has_sha1 = 1;
 219         } else if (!strcmp(name, "id2")) {
 220                 ctx.qry.sha2 = xstrdup(value);
 221                 ctx.qry.has_sha1 = 1;
 222         } else if (!strcmp(name, "ofs")) {
 223                 ctx.qry.ofs = atoi(value);
 224         } else if (!strcmp(name, "path")) {
 225                 ctx.qry.path = trim_end(value, '/');
 226         } else if (!strcmp(name, "name")) {
 227                 ctx.qry.name = xstrdup(value);
 228         } else if (!strcmp(name, "mimetype")) {
 229                 ctx.qry.mimetype = xstrdup(value);
 230         } else if (!strcmp(name, "s")){
 231                 ctx.qry.sort = xstrdup(value);
 232         } else if (!strcmp(name, "showmsg")) {
 233                 ctx.qry.showmsg = atoi(value);
 234         } else if (!strcmp(name, "period")) {
 235                 ctx.qry.period = xstrdup(value);
 236         }
 237 }
 238
 239 char *xstrdupn(const char *str)
 240 {
 241         return (str ? xstrdup(str) : NULL);
 242 }
 243
 244 static void prepare_context(struct cgit_context *ctx)
 245 {
 246         memset(ctx, 0, sizeof(ctx));
 247         ctx->cfg.agefile = "info/web/last-modified";
 248         ctx->cfg.nocache = 0;
 249         ctx->cfg.cache_size = 0;
 250         ctx->cfg.cache_dynamic_ttl = 5;
 251         ctx->cfg.cache_max_create_time = 5;
 252         ctx->cfg.cache_repo_ttl = 5;
 253         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 254         ctx->cfg.cache_root_ttl = 5;
 255         ctx->cfg.cache_scanrc_ttl = 15;
 256         ctx->cfg.cache_static_ttl = -1;
 257         ctx->cfg.css = "/cgit.css";
 258         ctx->cfg.logo = "/cgit.png";
 259         ctx->cfg.local_time = 0;
 260         ctx->cfg.max_repo_count = 50;
 261         ctx->cfg.max_commit_count = 50;
 262         ctx->cfg.max_lock_attempts = 5;
 263         ctx->cfg.max_msg_len = 80;
 264         ctx->cfg.max_repodesc_len = 80;
 265         ctx->cfg.max_stats = 0;
 266         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
 267         ctx->cfg.renamelimit = -1;
 268         ctx->cfg.robots = "index, nofollow";
 269         ctx->cfg.root_title = "Git repository browser";
 270         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 271         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 272         ctx->cfg.summary_branches = 10;
 273         ctx->cfg.summary_log = 10;
 274         ctx->cfg.summary_tags = 10;
 275         ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
 276         ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
 277         ctx->env.https = xstrdupn(getenv("HTTPS"));
 278         ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
 279         ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
 280         ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
 281         ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
 282         ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
 283         ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
 284         ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
 285         ctx->page.mimetype = "text/html";
 286         ctx->page.charset = PAGE_ENCODING;
 287         ctx->page.filename = NULL;
 288         ctx->page.size = 0;
 289         ctx->page.modified = time(NULL);
 290         ctx->page.expires = ctx->page.modified;
 291         ctx->page.etag = NULL;
 292         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 293         if (ctx->env.script_name)
 294                 ctx->cfg.script_name = ctx->env.script_name;
 295         if (ctx->env.query_string)
 296                 ctx->qry.raw = ctx->env.query_string;
 297         if (!ctx->env.cgit_config)
 298                 ctx->env.cgit_config = CGIT_CONFIG;
 299 }
 300
 301 struct refmatch {
 302         char *req_ref;
 303         char *first_ref;
 304         int match;
 305 };
 306
 307 int find_current_ref(const char *refname, const unsigned char *sha1,
 308                      int flags, void *cb_data)
 309 {
 310         struct refmatch *info;
 311
 312         info = (struct refmatch *)cb_data;
 313         if (!strcmp(refname, info->req_ref))
 314                 info->match = 1;
 315         if (!info->first_ref)
 316                 info->first_ref = xstrdup(refname);
 317         return info->match;
 318 }
 319
 320 char *find_default_branch(struct cgit_repo *repo)
 321 {
 322         struct refmatch info;
 323         char *ref;
 324
 325         info.req_ref = repo->defbranch;
 326         info.first_ref = NULL;
 327         info.match = 0;
 328         for_each_branch_ref(find_current_ref, &info);
 329         if (info.match)
 330                 ref = info.req_ref;
 331         else
 332                 ref = info.first_ref;
 333         if (ref)
 334                 ref = xstrdup(ref);
 335         return ref;
 336 }
 337
 338 static int prepare_repo_cmd(struct cgit_context *ctx)
 339 {
 340         char *tmp;
 341         unsigned char sha1[20];
 342         int nongit = 0;
 343
 344         setenv("GIT_DIR", ctx->repo->path, 1);
 345         setup_git_directory_gently(&nongit);
 346         if (nongit) {
 347                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 348                                       "config error");
 349                 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
 350                 ctx->repo = NULL;
 351                 cgit_print_http_headers(ctx);
 352                 cgit_print_docstart(ctx);
 353                 cgit_print_pageheader(ctx);
 354                 cgit_print_error(tmp);
 355                 cgit_print_docend();
 356                 return 1;
 357         }
 358         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 359
 360         if (!ctx->qry.head) {
 361                 ctx->qry.nohead = 1;
 362                 ctx->qry.head = find_default_branch(ctx->repo);
 363                 ctx->repo->defbranch = ctx->qry.head;
 364         }
 365
 366         if (!ctx->qry.head) {
 367                 cgit_print_http_headers(ctx);
 368                 cgit_print_docstart(ctx);
 369                 cgit_print_pageheader(ctx);
 370                 cgit_print_error("Repository seems to be empty");
 371                 cgit_print_docend();
 372                 return 1;
 373         }
 374
 375         if (get_sha1(ctx->qry.head, sha1)) {
 376                 tmp = xstrdup(ctx->qry.head);
 377                 ctx->qry.head = ctx->repo->defbranch;
 378                 ctx->page.status = 404;
 379                 ctx->page.statusmsg = "not found";
 380                 cgit_print_http_headers(ctx);
 381                 cgit_print_docstart(ctx);
 382                 cgit_print_pageheader(ctx);
 383                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 384                 cgit_print_docend();
 385                 return 1;
 386         }
 387         return 0;
 388 }
 389
 390 static void process_request(void *cbdata)
 391 {
 392         struct cgit_context *ctx = cbdata;
 393         struct cgit_cmd *cmd;
 394
 395         cmd = cgit_get_cmd(ctx);
 396         if (!cmd) {
 397                 ctx->page.title = "cgit error";
 398                 cgit_print_http_headers(ctx);
 399                 cgit_print_docstart(ctx);
 400                 cgit_print_pageheader(ctx);
 401                 cgit_print_error("Invalid request");
 402                 cgit_print_docend();
 403                 return;
 404         }
 405
 406         if (cmd->want_repo && !ctx->repo) {
 407                 cgit_print_http_headers(ctx);
 408                 cgit_print_docstart(ctx);
 409                 cgit_print_pageheader(ctx);
 410                 cgit_print_error(fmt("No repository selected"));
 411                 cgit_print_docend();
 412                 return;
 413         }
 414
 415         if (ctx->repo && prepare_repo_cmd(ctx))
 416                 return;
 417
 418         if (cmd->want_layout) {
 419                 cgit_print_http_headers(ctx);
 420                 cgit_print_docstart(ctx);
 421                 cgit_print_pageheader(ctx);
 422         }
 423
 424         cmd->fn(ctx);
 425
 426         if (cmd->want_layout)
 427                 cgit_print_docend();
 428 }
 429
 430 int cmp_repos(const void *a, const void *b)
 431 {
 432         const struct cgit_repo *ra = a, *rb = b;
 433         return strcmp(ra->url, rb->url);
 434 }
 435
 436 void print_repo(FILE *f, struct cgit_repo *repo)
 437 {
 438         fprintf(f, "repo.url=%s\n", repo->url);
 439         fprintf(f, "repo.name=%s\n", repo->name);
 440         fprintf(f, "repo.path=%s\n", repo->path);
 441         if (repo->owner)
 442                 fprintf(f, "repo.owner=%s\n", repo->owner);
 443         if (repo->desc)
 444                 fprintf(f, "repo.desc=%s\n", repo->desc);
 445         if (repo->readme)
 446                 fprintf(f, "repo.readme=%s\n", repo->readme);
 447         fprintf(f, "\n");
 448 }
 449
 450 void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 451 {
 452         int i;
 453
 454         for(i = start; i < list->count; i++)
 455                 print_repo(f, &list->repos[i]);
 456 }
 457
 458 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 459  * and return 0 on success.
 460  */
 461 static int generate_cached_repolist(const char *path, const char *cached_rc)
 462 {
 463         char *locked_rc;
 464         int idx;
 465         FILE *f;
 466
 467         locked_rc = xstrdup(fmt("%s.lock", cached_rc));
 468         f = fopen(locked_rc, "wx");
 469         if (!f) {
 470                 /* Inform about the error unless the lockfile already existed,
 471                  * since that only means we've got concurrent requests.
 472                  */
 473                 if (errno != EEXIST)
 474                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 475                                 locked_rc, strerror(errno), errno);
 476                 return errno;
 477         }
 478         idx = cgit_repolist.count;
 479         scan_tree(path, repo_config);
 480         print_repolist(f, &cgit_repolist, idx);
 481         if (rename(locked_rc, cached_rc))
 482                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 483                         locked_rc, cached_rc, strerror(errno), errno);
 484         fclose(f);
 485         return 0;
 486 }
 487
 488 static void process_cached_repolist(const char *path)
 489 {
 490         struct stat st;
 491         char *cached_rc;
 492         time_t age;
 493
 494         cached_rc = xstrdup(fmt("%s/rc-%8x", ctx.cfg.cache_root,
 495                 hash_str(path)));
 496
 497         if (stat(cached_rc, &st)) {
 498                 /* Nothing is cached, we need to scan without forking. And
 499                  * if we fail to generate a cached repolist, we need to
 500                  * invoke scan_tree manually.
 501                  */
 502                 if (generate_cached_repolist(path, cached_rc))
 503                         scan_tree(path, repo_config);
 504                 return;
 505         }
 506
 507         parse_configfile(cached_rc, config_cb);
 508
 509         /* If the cached configfile hasn't expired, lets exit now */
 510         age = time(NULL) - st.st_mtime;
 511         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 512                 return;
 513
 514         /* The cached repolist has been parsed, but it was old. So lets
 515          * rescan the specified path and generate a new cached repolist
 516          * in a child-process to avoid latency for the current request.
 517          */
 518         if (fork())
 519                 return;
 520
 521         exit(generate_cached_repolist(path, cached_rc));
 522 }
 523
 524 static void cgit_parse_args(int argc, const char **argv)
 525 {
 526         int i;
 527         int scan = 0;
 528
 529         for (i = 1; i < argc; i++) {
 530                 if (!strncmp(argv[i], "--cache=", 8)) {
 531                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 532                 }
 533                 if (!strcmp(argv[i], "--nocache")) {
 534                         ctx.cfg.nocache = 1;
 535                 }
 536                 if (!strcmp(argv[i], "--nohttp")) {
 537                         ctx.env.no_http = "1";
 538                 }
 539                 if (!strncmp(argv[i], "--query=", 8)) {
 540                         ctx.qry.raw = xstrdup(argv[i]+8);
 541                 }
 542                 if (!strncmp(argv[i], "--repo=", 7)) {
 543                         ctx.qry.repo = xstrdup(argv[i]+7);
 544                 }
 545                 if (!strncmp(argv[i], "--page=", 7)) {
 546                         ctx.qry.page = xstrdup(argv[i]+7);
 547                 }
 548                 if (!strncmp(argv[i], "--head=", 7)) {
 549                         ctx.qry.head = xstrdup(argv[i]+7);
 550                         ctx.qry.has_symref = 1;
 551                 }
 552                 if (!strncmp(argv[i], "--sha1=", 7)) {
 553                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 554                         ctx.qry.has_sha1 = 1;
 555                 }
 556                 if (!strncmp(argv[i], "--ofs=", 6)) {
 557                         ctx.qry.ofs = atoi(argv[i]+6);
 558                 }
 559                 if (!strncmp(argv[i], "--scan-tree=", 12) ||
 560                     !strncmp(argv[i], "--scan-path=", 12)) {
 561                         scan++;
 562                         scan_tree(argv[i] + 12, repo_config);
 563                 }
 564         }
 565         if (scan) {
 566                 qsort(cgit_repolist.repos, cgit_repolist.count,
 567                         sizeof(struct cgit_repo), cmp_repos);
 568                 print_repolist(stdout, &cgit_repolist, 0);
 569                 exit(0);
 570         }
 571 }
 572
 573 static int calc_ttl()
 574 {
 575         if (!ctx.repo)
 576                 return ctx.cfg.cache_root_ttl;
 577
 578         if (!ctx.qry.page)
 579                 return ctx.cfg.cache_repo_ttl;
 580
 581         if (ctx.qry.has_symref)
 582                 return ctx.cfg.cache_dynamic_ttl;
 583
 584         if (ctx.qry.has_sha1)
 585                 return ctx.cfg.cache_static_ttl;
 586
 587         return ctx.cfg.cache_repo_ttl;
 588 }
 589
 590 int main(int argc, const char **argv)
 591 {
 592         const char *path;
 593         char *qry;
 594         int err, ttl;
 595
 596         prepare_context(&ctx);
 597         cgit_repolist.length = 0;
 598         cgit_repolist.count = 0;
 599         cgit_repolist.repos = NULL;
 600
 601         cgit_parse_args(argc, argv);
 602         parse_configfile(ctx.env.cgit_config, config_cb);
 603         ctx.repo = NULL;
 604         http_parse_querystring(ctx.qry.raw, querystring_cb);
 605
 606         /* If virtual-root isn't specified in cgitrc, lets pretend
 607          * that virtual-root equals SCRIPT_NAME.
 608          */
 609         if (!ctx.cfg.virtual_root)
 610                 ctx.cfg.virtual_root = ctx.cfg.script_name;
 611
 612         /* If no url parameter is specified on the querystring, lets
 613          * use PATH_INFO as url. This allows cgit to work with virtual
 614          * urls without the need for rewriterules in the webserver (as
 615          * long as PATH_INFO is included in the cache lookup key).
 616          */
 617         path = ctx.env.path_info;
 618         if (!ctx.qry.url && path) {
 619                 if (path[0] == '/')
 620                         path++;
 621                 ctx.qry.url = xstrdup(path);
 622                 if (ctx.qry.raw) {
 623                         qry = ctx.qry.raw;
 624                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 625                         free(qry);
 626                 } else
 627                         ctx.qry.raw = xstrdup(ctx.qry.url);
 628                 cgit_parse_url(ctx.qry.url);
 629         }
 630
 631         ttl = calc_ttl();
 632         ctx.page.expires += ttl*60;
 633         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 634                 ctx.cfg.nocache = 1;
 635         if (ctx.cfg.nocache)
 636                 ctx.cfg.cache_size = 0;
 637         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 638                             ctx.qry.raw, ttl, process_request, &ctx);
 639         if (err)
 640                 cgit_print_error(fmt("Error processing page: %s (%d)",
 641                                      strerror(err), err));
 642         return err;
 643 }