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