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