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, "readme") && value != NULL) {
  70                 if (*value == '/')
  71                         repo->readme = xstrdup(value);
  72                 else
  73                         repo->readme = xstrdup(fmt("%s/%s", repo->path, value));
  74         } else if (ctx.cfg.enable_filter_overrides) {
  75                 if (!strcmp(name, "about-filter"))
  76                         repo->about_filter = new_filter(value, 0);
  77                 else if (!strcmp(name, "commit-filter"))
  78                         repo->commit_filter = new_filter(value, 0);
  79                 else if (!strcmp(name, "source-filter"))
  80                         repo->source_filter = new_filter(value, 1);
  81         }
  82 }
  83
  84 void config_cb(const char *name, const char *value)
  85 {
  86         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
  87                 ctx.cfg.section = xstrdup(value);
  88         else if (!strcmp(name, "repo.url"))
  89                 ctx.repo = cgit_add_repo(value);
  90         else if (ctx.repo && !strcmp(name, "repo.path"))
  91                 ctx.repo->path = trim_end(value, '/');
  92         else if (ctx.repo && !prefixcmp(name, "repo."))
  93                 repo_config(ctx.repo, name + 5, value);
  94         else if (!strcmp(name, "root-title"))
  95                 ctx.cfg.root_title = xstrdup(value);
  96         else if (!strcmp(name, "root-desc"))
  97                 ctx.cfg.root_desc = xstrdup(value);
  98         else if (!strcmp(name, "root-readme"))
  99                 ctx.cfg.root_readme = xstrdup(value);
 100         else if (!strcmp(name, "css"))
 101                 ctx.cfg.css = xstrdup(value);
 102         else if (!strcmp(name, "favicon"))
 103                 ctx.cfg.favicon = xstrdup(value);
 104         else if (!strcmp(name, "footer"))
 105                 ctx.cfg.footer = xstrdup(value);
 106         else if (!strcmp(name, "head-include"))
 107                 ctx.cfg.head_include = xstrdup(value);
 108         else if (!strcmp(name, "header"))
 109                 ctx.cfg.header = xstrdup(value);
 110         else if (!strcmp(name, "logo"))
 111                 ctx.cfg.logo = xstrdup(value);
 112         else if (!strcmp(name, "index-header"))
 113                 ctx.cfg.index_header = xstrdup(value);
 114         else if (!strcmp(name, "index-info"))
 115                 ctx.cfg.index_info = xstrdup(value);
 116         else if (!strcmp(name, "logo-link"))
 117                 ctx.cfg.logo_link = xstrdup(value);
 118         else if (!strcmp(name, "module-link"))
 119                 ctx.cfg.module_link = xstrdup(value);
 120         else if (!strcmp(name, "virtual-root")) {
 121                 ctx.cfg.virtual_root = trim_end(value, '/');
 122                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
 123                         ctx.cfg.virtual_root = "";
 124         } else if (!strcmp(name, "nocache"))
 125                 ctx.cfg.nocache = atoi(value);
 126         else if (!strcmp(name, "noplainemail"))
 127                 ctx.cfg.noplainemail = atoi(value);
 128         else if (!strcmp(name, "noheader"))
 129                 ctx.cfg.noheader = atoi(value);
 130         else if (!strcmp(name, "snapshots"))
 131                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 132         else if (!strcmp(name, "enable-filter-overrides"))
 133                 ctx.cfg.enable_filter_overrides = atoi(value);
 134         else if (!strcmp(name, "enable-index-links"))
 135                 ctx.cfg.enable_index_links = atoi(value);
 136         else if (!strcmp(name, "enable-log-filecount"))
 137                 ctx.cfg.enable_log_filecount = atoi(value);
 138         else if (!strcmp(name, "enable-log-linecount"))
 139                 ctx.cfg.enable_log_linecount = atoi(value);
 140         else if (!strcmp(name, "enable-tree-linenumbers"))
 141                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 142         else if (!strcmp(name, "max-stats"))
 143                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 144         else if (!strcmp(name, "cache-size"))
 145                 ctx.cfg.cache_size = atoi(value);
 146         else if (!strcmp(name, "cache-root"))
 147                 ctx.cfg.cache_root = xstrdup(value);
 148         else if (!strcmp(name, "cache-root-ttl"))
 149                 ctx.cfg.cache_root_ttl = atoi(value);
 150         else if (!strcmp(name, "cache-repo-ttl"))
 151                 ctx.cfg.cache_repo_ttl = atoi(value);
 152         else if (!strcmp(name, "cache-scanrc-ttl"))
 153                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 154         else if (!strcmp(name, "cache-static-ttl"))
 155                 ctx.cfg.cache_static_ttl = atoi(value);
 156         else if (!strcmp(name, "cache-dynamic-ttl"))
 157                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 158         else if (!strcmp(name, "about-filter"))
 159                 ctx.cfg.about_filter = new_filter(value, 0);
 160         else if (!strcmp(name, "commit-filter"))
 161                 ctx.cfg.commit_filter = new_filter(value, 0);
 162         else if (!strcmp(name, "embedded"))
 163                 ctx.cfg.embedded = atoi(value);
 164         else if (!strcmp(name, "max-message-length"))
 165                 ctx.cfg.max_msg_len = atoi(value);
 166         else if (!strcmp(name, "max-repodesc-length"))
 167                 ctx.cfg.max_repodesc_len = atoi(value);
 168         else if (!strcmp(name, "max-repo-count"))
 169                 ctx.cfg.max_repo_count = atoi(value);
 170         else if (!strcmp(name, "max-commit-count"))
 171                 ctx.cfg.max_commit_count = atoi(value);
 172         else if (!strcmp(name, "scan-path"))
 173                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 174                         process_cached_repolist(value);
 175                 else
 176                         scan_tree(value, repo_config);
 177         else if (!strcmp(name, "source-filter"))
 178                 ctx.cfg.source_filter = new_filter(value, 1);
 179         else if (!strcmp(name, "summary-log"))
 180                 ctx.cfg.summary_log = atoi(value);
 181         else if (!strcmp(name, "summary-branches"))
 182                 ctx.cfg.summary_branches = atoi(value);
 183         else if (!strcmp(name, "summary-tags"))
 184                 ctx.cfg.summary_tags = atoi(value);
 185         else if (!strcmp(name, "agefile"))
 186                 ctx.cfg.agefile = xstrdup(value);
 187         else if (!strcmp(name, "renamelimit"))
 188                 ctx.cfg.renamelimit = atoi(value);
 189         else if (!strcmp(name, "robots"))
 190                 ctx.cfg.robots = xstrdup(value);
 191         else if (!strcmp(name, "clone-prefix"))
 192                 ctx.cfg.clone_prefix = xstrdup(value);
 193         else if (!strcmp(name, "local-time"))
 194                 ctx.cfg.local_time = atoi(value);
 195         else if (!prefixcmp(name, "mimetype."))
 196                 add_mimetype(name + 9, value);
 197         else if (!strcmp(name, "include"))
 198                 parse_configfile(value, config_cb);
 199 }
 200
 201 static void querystring_cb(const char *name, const char *value)
 202 {
 203         if (!value)
 204                 value = "";
 205
 206         if (!strcmp(name,"r")) {
 207                 ctx.qry.repo = xstrdup(value);
 208                 ctx.repo = cgit_get_repoinfo(value);
 209         } else if (!strcmp(name, "p")) {
 210                 ctx.qry.page = xstrdup(value);
 211         } else if (!strcmp(name, "url")) {
 212                 ctx.qry.url = xstrdup(value);
 213                 cgit_parse_url(value);
 214         } else if (!strcmp(name, "qt")) {
 215                 ctx.qry.grep = xstrdup(value);
 216         } else if (!strcmp(name, "q")) {
 217                 ctx.qry.search = xstrdup(value);
 218         } else if (!strcmp(name, "h")) {
 219                 ctx.qry.head = xstrdup(value);
 220                 ctx.qry.has_symref = 1;
 221         } else if (!strcmp(name, "id")) {
 222                 ctx.qry.sha1 = xstrdup(value);
 223                 ctx.qry.has_sha1 = 1;
 224         } else if (!strcmp(name, "id2")) {
 225                 ctx.qry.sha2 = xstrdup(value);
 226                 ctx.qry.has_sha1 = 1;
 227         } else if (!strcmp(name, "ofs")) {
 228                 ctx.qry.ofs = atoi(value);
 229         } else if (!strcmp(name, "path")) {
 230                 ctx.qry.path = trim_end(value, '/');
 231         } else if (!strcmp(name, "name")) {
 232                 ctx.qry.name = xstrdup(value);
 233         } else if (!strcmp(name, "mimetype")) {
 234                 ctx.qry.mimetype = xstrdup(value);
 235         } else if (!strcmp(name, "s")){
 236                 ctx.qry.sort = xstrdup(value);
 237         } else if (!strcmp(name, "showmsg")) {
 238                 ctx.qry.showmsg = atoi(value);
 239         } else if (!strcmp(name, "period")) {
 240                 ctx.qry.period = xstrdup(value);
 241         }
 242 }
 243
 244 char *xstrdupn(const char *str)
 245 {
 246         return (str ? xstrdup(str) : NULL);
 247 }
 248
 249 static void prepare_context(struct cgit_context *ctx)
 250 {
 251         memset(ctx, 0, sizeof(*ctx));
 252         ctx->cfg.agefile = "info/web/last-modified";
 253         ctx->cfg.nocache = 0;
 254         ctx->cfg.cache_size = 0;
 255         ctx->cfg.cache_dynamic_ttl = 5;
 256         ctx->cfg.cache_max_create_time = 5;
 257         ctx->cfg.cache_repo_ttl = 5;
 258         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 259         ctx->cfg.cache_root_ttl = 5;
 260         ctx->cfg.cache_scanrc_ttl = 15;
 261         ctx->cfg.cache_static_ttl = -1;
 262         ctx->cfg.css = "/cgit.css";
 263         ctx->cfg.logo = "/cgit.png";
 264         ctx->cfg.local_time = 0;
 265         ctx->cfg.enable_tree_linenumbers = 1;
 266         ctx->cfg.max_repo_count = 50;
 267         ctx->cfg.max_commit_count = 50;
 268         ctx->cfg.max_lock_attempts = 5;
 269         ctx->cfg.max_msg_len = 80;
 270         ctx->cfg.max_repodesc_len = 80;
 271         ctx->cfg.max_stats = 0;
 272         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
 273         ctx->cfg.renamelimit = -1;
 274         ctx->cfg.robots = "index, nofollow";
 275         ctx->cfg.root_title = "Git repository browser";
 276         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 277         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 278         ctx->cfg.section = "";
 279         ctx->cfg.summary_branches = 10;
 280         ctx->cfg.summary_log = 10;
 281         ctx->cfg.summary_tags = 10;
 282         ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
 283         ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
 284         ctx->env.https = xstrdupn(getenv("HTTPS"));
 285         ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
 286         ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
 287         ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
 288         ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
 289         ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
 290         ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
 291         ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
 292         ctx->page.mimetype = "text/html";
 293         ctx->page.charset = PAGE_ENCODING;
 294         ctx->page.filename = NULL;
 295         ctx->page.size = 0;
 296         ctx->page.modified = time(NULL);
 297         ctx->page.expires = ctx->page.modified;
 298         ctx->page.etag = NULL;
 299         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 300         if (ctx->env.script_name)
 301                 ctx->cfg.script_name = ctx->env.script_name;
 302         if (ctx->env.query_string)
 303                 ctx->qry.raw = ctx->env.query_string;
 304         if (!ctx->env.cgit_config)
 305                 ctx->env.cgit_config = CGIT_CONFIG;
 306 }
 307
 308 struct refmatch {
 309         char *req_ref;
 310         char *first_ref;
 311         int match;
 312 };
 313
 314 int find_current_ref(const char *refname, const unsigned char *sha1,
 315                      int flags, void *cb_data)
 316 {
 317         struct refmatch *info;
 318
 319         info = (struct refmatch *)cb_data;
 320         if (!strcmp(refname, info->req_ref))
 321                 info->match = 1;
 322         if (!info->first_ref)
 323                 info->first_ref = xstrdup(refname);
 324         return info->match;
 325 }
 326
 327 char *find_default_branch(struct cgit_repo *repo)
 328 {
 329         struct refmatch info;
 330         char *ref;
 331
 332         info.req_ref = repo->defbranch;
 333         info.first_ref = NULL;
 334         info.match = 0;
 335         for_each_branch_ref(find_current_ref, &info);
 336         if (info.match)
 337                 ref = info.req_ref;
 338         else
 339                 ref = info.first_ref;
 340         if (ref)
 341                 ref = xstrdup(ref);
 342         return ref;
 343 }
 344
 345 static int prepare_repo_cmd(struct cgit_context *ctx)
 346 {
 347         char *tmp;
 348         unsigned char sha1[20];
 349         int nongit = 0;
 350
 351         setenv("GIT_DIR", ctx->repo->path, 1);
 352         setup_git_directory_gently(&nongit);
 353         if (nongit) {
 354                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 355                                       "config error");
 356                 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
 357                 ctx->repo = NULL;
 358                 cgit_print_http_headers(ctx);
 359                 cgit_print_docstart(ctx);
 360                 cgit_print_pageheader(ctx);
 361                 cgit_print_error(tmp);
 362                 cgit_print_docend();
 363                 return 1;
 364         }
 365         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 366
 367         if (!ctx->qry.head) {
 368                 ctx->qry.nohead = 1;
 369                 ctx->qry.head = find_default_branch(ctx->repo);
 370                 ctx->repo->defbranch = ctx->qry.head;
 371         }
 372
 373         if (!ctx->qry.head) {
 374                 cgit_print_http_headers(ctx);
 375                 cgit_print_docstart(ctx);
 376                 cgit_print_pageheader(ctx);
 377                 cgit_print_error("Repository seems to be empty");
 378                 cgit_print_docend();
 379                 return 1;
 380         }
 381
 382         if (get_sha1(ctx->qry.head, sha1)) {
 383                 tmp = xstrdup(ctx->qry.head);
 384                 ctx->qry.head = ctx->repo->defbranch;
 385                 ctx->page.status = 404;
 386                 ctx->page.statusmsg = "not found";
 387                 cgit_print_http_headers(ctx);
 388                 cgit_print_docstart(ctx);
 389                 cgit_print_pageheader(ctx);
 390                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 391                 cgit_print_docend();
 392                 return 1;
 393         }
 394         return 0;
 395 }
 396
 397 static void process_request(void *cbdata)
 398 {
 399         struct cgit_context *ctx = cbdata;
 400         struct cgit_cmd *cmd;
 401
 402         cmd = cgit_get_cmd(ctx);
 403         if (!cmd) {
 404                 ctx->page.title = "cgit error";
 405                 cgit_print_http_headers(ctx);
 406                 cgit_print_docstart(ctx);
 407                 cgit_print_pageheader(ctx);
 408                 cgit_print_error("Invalid request");
 409                 cgit_print_docend();
 410                 return;
 411         }
 412
 413         if (cmd->want_repo && !ctx->repo) {
 414                 cgit_print_http_headers(ctx);
 415                 cgit_print_docstart(ctx);
 416                 cgit_print_pageheader(ctx);
 417                 cgit_print_error(fmt("No repository selected"));
 418                 cgit_print_docend();
 419                 return;
 420         }
 421
 422         if (ctx->repo && prepare_repo_cmd(ctx))
 423                 return;
 424
 425         if (cmd->want_layout) {
 426                 cgit_print_http_headers(ctx);
 427                 cgit_print_docstart(ctx);
 428                 cgit_print_pageheader(ctx);
 429         }
 430
 431         cmd->fn(ctx);
 432
 433         if (cmd->want_layout)
 434                 cgit_print_docend();
 435 }
 436
 437 int cmp_repos(const void *a, const void *b)
 438 {
 439         const struct cgit_repo *ra = a, *rb = b;
 440         return strcmp(ra->url, rb->url);
 441 }
 442
 443 char *build_snapshot_setting(int bitmap)
 444 {
 445         const struct cgit_snapshot_format *f;
 446         char *result = xstrdup("");
 447         char *tmp;
 448         int len;
 449
 450         for (f = cgit_snapshot_formats; f->suffix; f++) {
 451                 if (f->bit & bitmap) {
 452                         tmp = result;
 453                         result = xstrdup(fmt("%s%s ", tmp, f->suffix));
 454                         free(tmp);
 455                 }
 456         }
 457         len = strlen(result);
 458         if (len)
 459                 result[len - 1] = '\0';
 460         return result;
 461 }
 462
 463 char *get_first_line(char *txt)
 464 {
 465         char *t = xstrdup(txt);
 466         char *p = strchr(t, '\n');
 467         if (p)
 468                 *p = '\0';
 469         return t;
 470 }
 471
 472 void print_repo(FILE *f, struct cgit_repo *repo)
 473 {
 474         fprintf(f, "repo.url=%s\n", repo->url);
 475         fprintf(f, "repo.name=%s\n", repo->name);
 476         fprintf(f, "repo.path=%s\n", repo->path);
 477         if (repo->owner)
 478                 fprintf(f, "repo.owner=%s\n", repo->owner);
 479         if (repo->desc) {
 480                 char *tmp = get_first_line(repo->desc);
 481                 fprintf(f, "repo.desc=%s\n", tmp);
 482                 free(tmp);
 483         }
 484         if (repo->readme)
 485                 fprintf(f, "repo.readme=%s\n", repo->readme);
 486         if (repo->defbranch)
 487                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 488         if (repo->module_link)
 489                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 490         if (repo->section)
 491                 fprintf(f, "repo.section=%s\n", repo->section);
 492         if (repo->clone_url)
 493                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 494         fprintf(f, "repo.enable-log-filecount=%d\n",
 495                 repo->enable_log_filecount);
 496         fprintf(f, "repo.enable-log-linecount=%d\n",
 497                 repo->enable_log_linecount);
 498         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 499                 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
 500         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 501                 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
 502         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 503                 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
 504         if (repo->snapshots != ctx.cfg.snapshots) {
 505                 char *tmp = build_snapshot_setting(repo->snapshots);
 506                 fprintf(f, "repo.snapshots=%s\n", tmp);
 507                 free(tmp);
 508         }
 509         if (repo->max_stats != ctx.cfg.max_stats)
 510                 fprintf(f, "repo.max-stats=%s\n",
 511                         cgit_find_stats_periodname(repo->max_stats));
 512         fprintf(f, "\n");
 513 }
 514
 515 void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 516 {
 517         int i;
 518
 519         for(i = start; i < list->count; i++)
 520                 print_repo(f, &list->repos[i]);
 521 }
 522
 523 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 524  * and return 0 on success.
 525  */
 526 static int generate_cached_repolist(const char *path, const char *cached_rc)
 527 {
 528         char *locked_rc;
 529         int idx;
 530         FILE *f;
 531
 532         locked_rc = xstrdup(fmt("%s.lock", cached_rc));
 533         f = fopen(locked_rc, "wx");
 534         if (!f) {
 535                 /* Inform about the error unless the lockfile already existed,
 536                  * since that only means we've got concurrent requests.
 537                  */
 538                 if (errno != EEXIST)
 539                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 540                                 locked_rc, strerror(errno), errno);
 541                 return errno;
 542         }
 543         idx = cgit_repolist.count;
 544         scan_tree(path, repo_config);
 545         print_repolist(f, &cgit_repolist, idx);
 546         if (rename(locked_rc, cached_rc))
 547                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 548                         locked_rc, cached_rc, strerror(errno), errno);
 549         fclose(f);
 550         return 0;
 551 }
 552
 553 static void process_cached_repolist(const char *path)
 554 {
 555         struct stat st;
 556         char *cached_rc;
 557         time_t age;
 558
 559         cached_rc = xstrdup(fmt("%s/rc-%8x", ctx.cfg.cache_root,
 560                 hash_str(path)));
 561
 562         if (stat(cached_rc, &st)) {
 563                 /* Nothing is cached, we need to scan without forking. And
 564                  * if we fail to generate a cached repolist, we need to
 565                  * invoke scan_tree manually.
 566                  */
 567                 if (generate_cached_repolist(path, cached_rc))
 568                         scan_tree(path, repo_config);
 569                 return;
 570         }
 571
 572         parse_configfile(cached_rc, config_cb);
 573
 574         /* If the cached configfile hasn't expired, lets exit now */
 575         age = time(NULL) - st.st_mtime;
 576         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 577                 return;
 578
 579         /* The cached repolist has been parsed, but it was old. So lets
 580          * rescan the specified path and generate a new cached repolist
 581          * in a child-process to avoid latency for the current request.
 582          */
 583         if (fork())
 584                 return;
 585
 586         exit(generate_cached_repolist(path, cached_rc));
 587 }
 588
 589 static void cgit_parse_args(int argc, const char **argv)
 590 {
 591         int i;
 592         int scan = 0;
 593
 594         for (i = 1; i < argc; i++) {
 595                 if (!strncmp(argv[i], "--cache=", 8)) {
 596                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 597                 }
 598                 if (!strcmp(argv[i], "--nocache")) {
 599                         ctx.cfg.nocache = 1;
 600                 }
 601                 if (!strcmp(argv[i], "--nohttp")) {
 602                         ctx.env.no_http = "1";
 603                 }
 604                 if (!strncmp(argv[i], "--query=", 8)) {
 605                         ctx.qry.raw = xstrdup(argv[i]+8);
 606                 }
 607                 if (!strncmp(argv[i], "--repo=", 7)) {
 608                         ctx.qry.repo = xstrdup(argv[i]+7);
 609                 }
 610                 if (!strncmp(argv[i], "--page=", 7)) {
 611                         ctx.qry.page = xstrdup(argv[i]+7);
 612                 }
 613                 if (!strncmp(argv[i], "--head=", 7)) {
 614                         ctx.qry.head = xstrdup(argv[i]+7);
 615                         ctx.qry.has_symref = 1;
 616                 }
 617                 if (!strncmp(argv[i], "--sha1=", 7)) {
 618                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 619                         ctx.qry.has_sha1 = 1;
 620                 }
 621                 if (!strncmp(argv[i], "--ofs=", 6)) {
 622                         ctx.qry.ofs = atoi(argv[i]+6);
 623                 }
 624                 if (!strncmp(argv[i], "--scan-tree=", 12) ||
 625                     !strncmp(argv[i], "--scan-path=", 12)) {
 626                         /* HACK: the global snapshot bitmask defines the
 627                          * set of allowed snapshot formats, but the config
 628                          * file hasn't been parsed yet so the mask is
 629                          * currently 0. By setting all bits high before
 630                          * scanning we make sure that any in-repo cgitrc
 631                          * snapshot setting is respected by scan_tree().
 632                          * BTW: we assume that there'll never be more than
 633                          * 255 different snapshot formats supported by cgit...
 634                          */
 635                         ctx.cfg.snapshots = 0xFF;
 636                         scan++;
 637                         scan_tree(argv[i] + 12, repo_config);
 638                 }
 639         }
 640         if (scan) {
 641                 qsort(cgit_repolist.repos, cgit_repolist.count,
 642                         sizeof(struct cgit_repo), cmp_repos);
 643                 print_repolist(stdout, &cgit_repolist, 0);
 644                 exit(0);
 645         }
 646 }
 647
 648 static int calc_ttl()
 649 {
 650         if (!ctx.repo)
 651                 return ctx.cfg.cache_root_ttl;
 652
 653         if (!ctx.qry.page)
 654                 return ctx.cfg.cache_repo_ttl;
 655
 656         if (ctx.qry.has_symref)
 657                 return ctx.cfg.cache_dynamic_ttl;
 658
 659         if (ctx.qry.has_sha1)
 660                 return ctx.cfg.cache_static_ttl;
 661
 662         return ctx.cfg.cache_repo_ttl;
 663 }
 664
 665 int main(int argc, const char **argv)
 666 {
 667         const char *path;
 668         char *qry;
 669         int err, ttl;
 670
 671         prepare_context(&ctx);
 672         cgit_repolist.length = 0;
 673         cgit_repolist.count = 0;
 674         cgit_repolist.repos = NULL;
 675
 676         cgit_parse_args(argc, argv);
 677         parse_configfile(ctx.env.cgit_config, config_cb);
 678         ctx.repo = NULL;
 679         http_parse_querystring(ctx.qry.raw, querystring_cb);
 680
 681         /* If virtual-root isn't specified in cgitrc, lets pretend
 682          * that virtual-root equals SCRIPT_NAME.
 683          */
 684         if (!ctx.cfg.virtual_root)
 685                 ctx.cfg.virtual_root = ctx.cfg.script_name;
 686
 687         /* If no url parameter is specified on the querystring, lets
 688          * use PATH_INFO as url. This allows cgit to work with virtual
 689          * urls without the need for rewriterules in the webserver (as
 690          * long as PATH_INFO is included in the cache lookup key).
 691          */
 692         path = ctx.env.path_info;
 693         if (!ctx.qry.url && path) {
 694                 if (path[0] == '/')
 695                         path++;
 696                 ctx.qry.url = xstrdup(path);
 697                 if (ctx.qry.raw) {
 698                         qry = ctx.qry.raw;
 699                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 700                         free(qry);
 701                 } else
 702                         ctx.qry.raw = xstrdup(ctx.qry.url);
 703                 cgit_parse_url(ctx.qry.url);
 704         }
 705
 706         ttl = calc_ttl();
 707         ctx.page.expires += ttl*60;
 708         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 709                 ctx.cfg.nocache = 1;
 710         if (ctx.cfg.nocache)
 711                 ctx.cfg.cache_size = 0;
 712         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 713                             ctx.qry.raw, ttl, process_request, &ctx);
 714         if (err)
 715                 cgit_print_error(fmt("Error processing page: %s (%d)",
 716                                      strerror(err), err));
 717         return err;
 718 }