cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   4  * Copyright (C) 2010, 2012 Jason A. Donenfeld <Jason@zx2c4.com>
   5  *
   6  * Licensed under GNU General Public License v2
   7  *   (see COPYING for full license text)
   8  */
   9
  10 #include "cgit.h"
  11 #include "cache.h"
  12 #include "cmd.h"
  13 #include "configfile.h"
  14 #include "html.h"
  15 #include "ui-shared.h"
  16 #include "ui-stats.h"
  17 #include "scan-tree.h"
  18
  19 const char *cgit_version = CGIT_VERSION;
  20
  21 static void add_mimetype(const char *name, const char *value)
  22 {
  23         struct string_list_item *item;
  24
  25         item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
  26         item->util = xstrdup(value);
  27 }
  28
  29 static struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
  30 {
  31         struct cgit_filter *f;
  32         int args_size = 0;
  33         int extra_args;
  34
  35         if (!cmd || !cmd[0])
  36                 return NULL;
  37
  38         switch (filtertype) {
  39                 case SOURCE:
  40                         extra_args = 1;
  41                         break;
  42
  43                 case ABOUT:
  44                 case COMMIT:
  45                 default:
  46                         extra_args = 0;
  47                         break;
  48         }
  49
  50         f = xmalloc(sizeof(struct cgit_filter));
  51         f->cmd = xstrdup(cmd);
  52         args_size = (2 + extra_args) * sizeof(char *);
  53         f->argv = xmalloc(args_size);
  54         memset(f->argv, 0, args_size);
  55         f->argv[0] = f->cmd;
  56         return f;
  57 }
  58
  59 static void process_cached_repolist(const char *path);
  60
  61 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  62 {
  63         struct string_list_item *item;
  64
  65         if (!strcmp(name, "name"))
  66                 repo->name = xstrdup(value);
  67         else if (!strcmp(name, "clone-url"))
  68                 repo->clone_url = xstrdup(value);
  69         else if (!strcmp(name, "desc"))
  70                 repo->desc = xstrdup(value);
  71         else if (!strcmp(name, "owner"))
  72                 repo->owner = xstrdup(value);
  73         else if (!strcmp(name, "defbranch"))
  74                 repo->defbranch = xstrdup(value);
  75         else if (!strcmp(name, "snapshots"))
  76                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  77         else if (!strcmp(name, "enable-commit-graph"))
  78                 repo->enable_commit_graph = atoi(value);
  79         else if (!strcmp(name, "enable-log-filecount"))
  80                 repo->enable_log_filecount = atoi(value);
  81         else if (!strcmp(name, "enable-log-linecount"))
  82                 repo->enable_log_linecount = atoi(value);
  83         else if (!strcmp(name, "enable-remote-branches"))
  84                 repo->enable_remote_branches = atoi(value);
  85         else if (!strcmp(name, "enable-subject-links"))
  86                 repo->enable_subject_links = atoi(value);
  87         else if (!strcmp(name, "commit-sort")) {
  88                 if (!strcmp(value, "date"))
  89                         repo->commit_sort = 1;
  90                 if (!strcmp(value, "topo"))
  91                         repo->commit_sort = 2;
  92         } else if (!strcmp(name, "max-stats"))
  93                 repo->max_stats = cgit_find_stats_period(value, NULL);
  94         else if (!strcmp(name, "module-link"))
  95                 repo->module_link= xstrdup(value);
  96         else if (!prefixcmp(name, "module-link.")) {
  97                 item = string_list_append(&repo->submodules, name + 12);
  98                 item->util = xstrdup(value);
  99         } else if (!strcmp(name, "section"))
 100                 repo->section = xstrdup(value);
 101         else if (!strcmp(name, "readme") && value != NULL)
 102                 repo->readme = xstrdup(value);
 103         else if (!strcmp(name, "logo") && value != NULL)
 104                 repo->logo = xstrdup(value);
 105         else if (!strcmp(name, "logo-link") && value != NULL)
 106                 repo->logo_link = xstrdup(value);
 107         else if (ctx.cfg.enable_filter_overrides) {
 108                 if (!strcmp(name, "about-filter"))
 109                         repo->about_filter = new_filter(value, ABOUT);
 110                 else if (!strcmp(name, "commit-filter"))
 111                         repo->commit_filter = new_filter(value, COMMIT);
 112                 else if (!strcmp(name, "source-filter"))
 113                         repo->source_filter = new_filter(value, SOURCE);
 114         }
 115 }
 116
 117 static void config_cb(const char *name, const char *value)
 118 {
 119         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 120                 ctx.cfg.section = xstrdup(value);
 121         else if (!strcmp(name, "repo.url"))
 122                 ctx.repo = cgit_add_repo(value);
 123         else if (ctx.repo && !strcmp(name, "repo.path"))
 124                 ctx.repo->path = trim_end(value, '/');
 125         else if (ctx.repo && !prefixcmp(name, "repo."))
 126                 repo_config(ctx.repo, name + 5, value);
 127         else if (!strcmp(name, "readme"))
 128                 ctx.cfg.readme = xstrdup(value);
 129         else if (!strcmp(name, "root-title"))
 130                 ctx.cfg.root_title = xstrdup(value);
 131         else if (!strcmp(name, "root-desc"))
 132                 ctx.cfg.root_desc = xstrdup(value);
 133         else if (!strcmp(name, "root-readme"))
 134                 ctx.cfg.root_readme = xstrdup(value);
 135         else if (!strcmp(name, "css"))
 136                 ctx.cfg.css = xstrdup(value);
 137         else if (!strcmp(name, "favicon"))
 138                 ctx.cfg.favicon = xstrdup(value);
 139         else if (!strcmp(name, "footer"))
 140                 ctx.cfg.footer = xstrdup(value);
 141         else if (!strcmp(name, "head-include"))
 142                 ctx.cfg.head_include = xstrdup(value);
 143         else if (!strcmp(name, "header"))
 144                 ctx.cfg.header = xstrdup(value);
 145         else if (!strcmp(name, "logo"))
 146                 ctx.cfg.logo = xstrdup(value);
 147         else if (!strcmp(name, "index-header"))
 148                 ctx.cfg.index_header = xstrdup(value);
 149         else if (!strcmp(name, "index-info"))
 150                 ctx.cfg.index_info = xstrdup(value);
 151         else if (!strcmp(name, "logo-link"))
 152                 ctx.cfg.logo_link = xstrdup(value);
 153         else if (!strcmp(name, "module-link"))
 154                 ctx.cfg.module_link = xstrdup(value);
 155         else if (!strcmp(name, "strict-export"))
 156                 ctx.cfg.strict_export = xstrdup(value);
 157         else if (!strcmp(name, "virtual-root")) {
 158                 ctx.cfg.virtual_root = trim_end(value, '/');
 159                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
 160                         ctx.cfg.virtual_root = "";
 161         } else if (!strcmp(name, "nocache"))
 162                 ctx.cfg.nocache = atoi(value);
 163         else if (!strcmp(name, "noplainemail"))
 164                 ctx.cfg.noplainemail = atoi(value);
 165         else if (!strcmp(name, "noheader"))
 166                 ctx.cfg.noheader = atoi(value);
 167         else if (!strcmp(name, "snapshots"))
 168                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 169         else if (!strcmp(name, "enable-filter-overrides"))
 170                 ctx.cfg.enable_filter_overrides = atoi(value);
 171         else if (!strcmp(name, "enable-http-clone"))
 172                 ctx.cfg.enable_http_clone = atoi(value);
 173         else if (!strcmp(name, "enable-index-links"))
 174                 ctx.cfg.enable_index_links = atoi(value);
 175         else if (!strcmp(name, "enable-index-owner"))
 176                 ctx.cfg.enable_index_owner = atoi(value);
 177         else if (!strcmp(name, "enable-commit-graph"))
 178                 ctx.cfg.enable_commit_graph = atoi(value);
 179         else if (!strcmp(name, "enable-log-filecount"))
 180                 ctx.cfg.enable_log_filecount = atoi(value);
 181         else if (!strcmp(name, "enable-log-linecount"))
 182                 ctx.cfg.enable_log_linecount = atoi(value);
 183         else if (!strcmp(name, "enable-remote-branches"))
 184                 ctx.cfg.enable_remote_branches = atoi(value);
 185         else if (!strcmp(name, "enable-subject-links"))
 186                 ctx.cfg.enable_subject_links = atoi(value);
 187         else if (!strcmp(name, "enable-tree-linenumbers"))
 188                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 189         else if (!strcmp(name, "enable-git-config"))
 190                 ctx.cfg.enable_git_config = atoi(value);
 191         else if (!strcmp(name, "max-stats"))
 192                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 193         else if (!strcmp(name, "cache-size"))
 194                 ctx.cfg.cache_size = atoi(value);
 195         else if (!strcmp(name, "cache-root"))
 196                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 197         else if (!strcmp(name, "cache-root-ttl"))
 198                 ctx.cfg.cache_root_ttl = atoi(value);
 199         else if (!strcmp(name, "cache-repo-ttl"))
 200                 ctx.cfg.cache_repo_ttl = atoi(value);
 201         else if (!strcmp(name, "cache-scanrc-ttl"))
 202                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 203         else if (!strcmp(name, "cache-static-ttl"))
 204                 ctx.cfg.cache_static_ttl = atoi(value);
 205         else if (!strcmp(name, "cache-dynamic-ttl"))
 206                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 207         else if (!strcmp(name, "case-sensitive-sort"))
 208                 ctx.cfg.case_sensitive_sort = atoi(value);
 209         else if (!strcmp(name, "about-filter"))
 210                 ctx.cfg.about_filter = new_filter(value, ABOUT);
 211         else if (!strcmp(name, "commit-filter"))
 212                 ctx.cfg.commit_filter = new_filter(value, COMMIT);
 213         else if (!strcmp(name, "embedded"))
 214                 ctx.cfg.embedded = atoi(value);
 215         else if (!strcmp(name, "max-atom-items"))
 216                 ctx.cfg.max_atom_items = atoi(value);
 217         else if (!strcmp(name, "max-message-length"))
 218                 ctx.cfg.max_msg_len = atoi(value);
 219         else if (!strcmp(name, "max-repodesc-length"))
 220                 ctx.cfg.max_repodesc_len = atoi(value);
 221         else if (!strcmp(name, "max-blob-size"))
 222                 ctx.cfg.max_blob_size = atoi(value);
 223         else if (!strcmp(name, "max-repo-count"))
 224                 ctx.cfg.max_repo_count = atoi(value);
 225         else if (!strcmp(name, "max-commit-count"))
 226                 ctx.cfg.max_commit_count = atoi(value);
 227         else if (!strcmp(name, "project-list"))
 228                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 229         else if (!strcmp(name, "scan-path"))
 230                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 231                         process_cached_repolist(expand_macros(value));
 232                 else if (ctx.cfg.project_list)
 233                         scan_projects(expand_macros(value),
 234                                       ctx.cfg.project_list, repo_config);
 235                 else
 236                         scan_tree(expand_macros(value), repo_config);
 237         else if (!strcmp(name, "scan-hidden-path"))
 238                 ctx.cfg.scan_hidden_path = atoi(value);
 239         else if (!strcmp(name, "section-from-path"))
 240                 ctx.cfg.section_from_path = atoi(value);
 241         else if (!strcmp(name, "repository-sort"))
 242                 ctx.cfg.repository_sort = xstrdup(value);
 243         else if (!strcmp(name, "section-sort"))
 244                 ctx.cfg.section_sort = atoi(value);
 245         else if (!strcmp(name, "source-filter"))
 246                 ctx.cfg.source_filter = new_filter(value, SOURCE);
 247         else if (!strcmp(name, "summary-log"))
 248                 ctx.cfg.summary_log = atoi(value);
 249         else if (!strcmp(name, "summary-branches"))
 250                 ctx.cfg.summary_branches = atoi(value);
 251         else if (!strcmp(name, "summary-tags"))
 252                 ctx.cfg.summary_tags = atoi(value);
 253         else if (!strcmp(name, "side-by-side-diffs"))
 254                 ctx.cfg.ssdiff = atoi(value);
 255         else if (!strcmp(name, "agefile"))
 256                 ctx.cfg.agefile = xstrdup(value);
 257         else if (!strcmp(name, "mimetype-file"))
 258                 ctx.cfg.mimetype_file = xstrdup(value);
 259         else if (!strcmp(name, "renamelimit"))
 260                 ctx.cfg.renamelimit = atoi(value);
 261         else if (!strcmp(name, "remove-suffix"))
 262                 ctx.cfg.remove_suffix = atoi(value);
 263         else if (!strcmp(name, "robots"))
 264                 ctx.cfg.robots = xstrdup(value);
 265         else if (!strcmp(name, "clone-prefix"))
 266                 ctx.cfg.clone_prefix = xstrdup(value);
 267         else if (!strcmp(name, "clone-url"))
 268                 ctx.cfg.clone_url = xstrdup(value);
 269         else if (!strcmp(name, "local-time"))
 270                 ctx.cfg.local_time = atoi(value);
 271         else if (!strcmp(name, "commit-sort")) {
 272                 if (!strcmp(value, "date"))
 273                         ctx.cfg.commit_sort = 1;
 274                 if (!strcmp(value, "topo"))
 275                         ctx.cfg.commit_sort = 2;
 276         } else if (!prefixcmp(name, "mimetype."))
 277                 add_mimetype(name + 9, value);
 278         else if (!strcmp(name, "include"))
 279                 parse_configfile(expand_macros(value), config_cb);
 280 }
 281
 282 static void querystring_cb(const char *name, const char *value)
 283 {
 284         if (!value)
 285                 value = "";
 286
 287         if (!strcmp(name,"r")) {
 288                 ctx.qry.repo = xstrdup(value);
 289                 ctx.repo = cgit_get_repoinfo(value);
 290         } else if (!strcmp(name, "p")) {
 291                 ctx.qry.page = xstrdup(value);
 292         } else if (!strcmp(name, "url")) {
 293                 if (*value == '/')
 294                         value++;
 295                 ctx.qry.url = xstrdup(value);
 296                 cgit_parse_url(value);
 297         } else if (!strcmp(name, "qt")) {
 298                 ctx.qry.grep = xstrdup(value);
 299         } else if (!strcmp(name, "q")) {
 300                 ctx.qry.search = xstrdup(value);
 301         } else if (!strcmp(name, "h")) {
 302                 ctx.qry.head = xstrdup(value);
 303                 ctx.qry.has_symref = 1;
 304         } else if (!strcmp(name, "id")) {
 305                 ctx.qry.sha1 = xstrdup(value);
 306                 ctx.qry.has_sha1 = 1;
 307         } else if (!strcmp(name, "id2")) {
 308                 ctx.qry.sha2 = xstrdup(value);
 309                 ctx.qry.has_sha1 = 1;
 310         } else if (!strcmp(name, "ofs")) {
 311                 ctx.qry.ofs = atoi(value);
 312         } else if (!strcmp(name, "path")) {
 313                 ctx.qry.path = trim_end(value, '/');
 314         } else if (!strcmp(name, "name")) {
 315                 ctx.qry.name = xstrdup(value);
 316         } else if (!strcmp(name, "mimetype")) {
 317                 ctx.qry.mimetype = xstrdup(value);
 318         } else if (!strcmp(name, "s")) {
 319                 ctx.qry.sort = xstrdup(value);
 320         } else if (!strcmp(name, "showmsg")) {
 321                 ctx.qry.showmsg = atoi(value);
 322         } else if (!strcmp(name, "period")) {
 323                 ctx.qry.period = xstrdup(value);
 324         } else if (!strcmp(name, "ss")) {
 325                 ctx.qry.ssdiff = atoi(value);
 326                 ctx.qry.has_ssdiff = 1;
 327         } else if (!strcmp(name, "all")) {
 328                 ctx.qry.show_all = atoi(value);
 329         } else if (!strcmp(name, "context")) {
 330                 ctx.qry.context = atoi(value);
 331         } else if (!strcmp(name, "ignorews")) {
 332                 ctx.qry.ignorews = atoi(value);
 333         }
 334 }
 335
 336 static void prepare_context(struct cgit_context *ctx)
 337 {
 338         memset(ctx, 0, sizeof(*ctx));
 339         ctx->cfg.agefile = "info/web/last-modified";
 340         ctx->cfg.nocache = 0;
 341         ctx->cfg.cache_size = 0;
 342         ctx->cfg.cache_dynamic_ttl = 5;
 343         ctx->cfg.cache_max_create_time = 5;
 344         ctx->cfg.cache_repo_ttl = 5;
 345         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 346         ctx->cfg.cache_root_ttl = 5;
 347         ctx->cfg.cache_scanrc_ttl = 15;
 348         ctx->cfg.cache_static_ttl = -1;
 349         ctx->cfg.case_sensitive_sort = 1;
 350         ctx->cfg.css = "/cgit.css";
 351         ctx->cfg.logo = "/cgit.png";
 352         ctx->cfg.local_time = 0;
 353         ctx->cfg.enable_http_clone = 1;
 354         ctx->cfg.enable_index_owner = 1;
 355         ctx->cfg.enable_tree_linenumbers = 1;
 356         ctx->cfg.enable_git_config = 0;
 357         ctx->cfg.max_repo_count = 50;
 358         ctx->cfg.max_commit_count = 50;
 359         ctx->cfg.max_lock_attempts = 5;
 360         ctx->cfg.max_msg_len = 80;
 361         ctx->cfg.max_repodesc_len = 80;
 362         ctx->cfg.max_blob_size = 0;
 363         ctx->cfg.max_stats = 0;
 364         ctx->cfg.project_list = NULL;
 365         ctx->cfg.renamelimit = -1;
 366         ctx->cfg.remove_suffix = 0;
 367         ctx->cfg.robots = "index, nofollow";
 368         ctx->cfg.root_title = "Git repository browser";
 369         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 370         ctx->cfg.scan_hidden_path = 0;
 371         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 372         ctx->cfg.section = "";
 373         ctx->cfg.repository_sort = "name";
 374         ctx->cfg.section_sort = 1;
 375         ctx->cfg.summary_branches = 10;
 376         ctx->cfg.summary_log = 10;
 377         ctx->cfg.summary_tags = 10;
 378         ctx->cfg.max_atom_items = 10;
 379         ctx->cfg.ssdiff = 0;
 380         ctx->env.cgit_config = getenv("CGIT_CONFIG");
 381         ctx->env.http_host = getenv("HTTP_HOST");
 382         ctx->env.https = getenv("HTTPS");
 383         ctx->env.no_http = getenv("NO_HTTP");
 384         ctx->env.path_info = getenv("PATH_INFO");
 385         ctx->env.query_string = getenv("QUERY_STRING");
 386         ctx->env.request_method = getenv("REQUEST_METHOD");
 387         ctx->env.script_name = getenv("SCRIPT_NAME");
 388         ctx->env.server_name = getenv("SERVER_NAME");
 389         ctx->env.server_port = getenv("SERVER_PORT");
 390         ctx->page.mimetype = "text/html";
 391         ctx->page.charset = PAGE_ENCODING;
 392         ctx->page.filename = NULL;
 393         ctx->page.size = 0;
 394         ctx->page.modified = time(NULL);
 395         ctx->page.expires = ctx->page.modified;
 396         ctx->page.etag = NULL;
 397         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 398         if (ctx->env.script_name)
 399                 ctx->cfg.script_name = xstrdup(ctx->env.script_name);
 400         if (ctx->env.query_string)
 401                 ctx->qry.raw = xstrdup(ctx->env.query_string);
 402         if (!ctx->env.cgit_config)
 403                 ctx->env.cgit_config = CGIT_CONFIG;
 404 }
 405
 406 struct refmatch {
 407         char *req_ref;
 408         char *first_ref;
 409         int match;
 410 };
 411
 412 static int find_current_ref(const char *refname, const unsigned char *sha1,
 413                             int flags, void *cb_data)
 414 {
 415         struct refmatch *info;
 416
 417         info = (struct refmatch *)cb_data;
 418         if (!strcmp(refname, info->req_ref))
 419                 info->match = 1;
 420         if (!info->first_ref)
 421                 info->first_ref = xstrdup(refname);
 422         return info->match;
 423 }
 424
 425 static void free_refmatch_inner(struct refmatch *info)
 426 {
 427         if (info->first_ref)
 428                 free(info->first_ref);
 429 }
 430
 431 static char *find_default_branch(struct cgit_repo *repo)
 432 {
 433         struct refmatch info;
 434         char *ref;
 435
 436         info.req_ref = repo->defbranch;
 437         info.first_ref = NULL;
 438         info.match = 0;
 439         for_each_branch_ref(find_current_ref, &info);
 440         if (info.match)
 441                 ref = info.req_ref;
 442         else
 443                 ref = info.first_ref;
 444         if (ref)
 445                 ref = xstrdup(ref);
 446         free_refmatch_inner(&info);
 447
 448         return ref;
 449 }
 450
 451 static char *guess_defbranch(void)
 452 {
 453         const char *ref;
 454         unsigned char sha1[20];
 455
 456         ref = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
 457         if (!ref || prefixcmp(ref, "refs/heads/"))
 458                 return "master";
 459         return xstrdup(ref + 11);
 460 }
 461
 462 static int prepare_repo_cmd(struct cgit_context *ctx)
 463 {
 464         char *tmp;
 465         unsigned char sha1[20];
 466         int nongit = 0;
 467         int rc;
 468
 469         setenv("GIT_DIR", ctx->repo->path, 1);
 470         setup_git_directory_gently(&nongit);
 471         if (nongit) {
 472                 rc = errno;
 473                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 474                                       "config error");
 475                 tmp = fmt("Failed to open %s: %s",
 476                           ctx->repo->name,
 477                           rc ? strerror(rc) : "Not a valid git repository");
 478                 ctx->repo = NULL;
 479                 cgit_print_http_headers(ctx);
 480                 cgit_print_docstart(ctx);
 481                 cgit_print_pageheader(ctx);
 482                 cgit_print_error(tmp);
 483                 cgit_print_docend();
 484                 return 1;
 485         }
 486         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 487
 488         if (!ctx->repo->defbranch)
 489                 ctx->repo->defbranch = guess_defbranch();
 490
 491         if (!ctx->qry.head) {
 492                 ctx->qry.nohead = 1;
 493                 ctx->qry.head = find_default_branch(ctx->repo);
 494         }
 495
 496         if (!ctx->qry.head) {
 497                 cgit_print_http_headers(ctx);
 498                 cgit_print_docstart(ctx);
 499                 cgit_print_pageheader(ctx);
 500                 cgit_print_error("Repository seems to be empty");
 501                 cgit_print_docend();
 502                 return 1;
 503         }
 504
 505         if (get_sha1(ctx->qry.head, sha1)) {
 506                 tmp = xstrdup(ctx->qry.head);
 507                 ctx->qry.head = ctx->repo->defbranch;
 508                 ctx->page.status = 404;
 509                 ctx->page.statusmsg = "Not found";
 510                 cgit_print_http_headers(ctx);
 511                 cgit_print_docstart(ctx);
 512                 cgit_print_pageheader(ctx);
 513                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 514                 cgit_print_docend();
 515                 return 1;
 516         }
 517         sort_string_list(&ctx->repo->submodules);
 518         cgit_prepare_repo_env(ctx->repo);
 519         return 0;
 520 }
 521
 522 static void process_request(void *cbdata)
 523 {
 524         struct cgit_context *ctx = cbdata;
 525         struct cgit_cmd *cmd;
 526
 527         cmd = cgit_get_cmd(ctx);
 528         if (!cmd) {
 529                 ctx->page.title = "cgit error";
 530                 ctx->page.status = 404;
 531                 ctx->page.statusmsg = "Not found";
 532                 cgit_print_http_headers(ctx);
 533                 cgit_print_docstart(ctx);
 534                 cgit_print_pageheader(ctx);
 535                 cgit_print_error("Invalid request");
 536                 cgit_print_docend();
 537                 return;
 538         }
 539
 540         if (!ctx->cfg.enable_http_clone && cmd->is_clone) {
 541                 html_status(404, "Not found", 0);
 542                 return;
 543         }
 544
 545         /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
 546          * in-project path limit to be made available at ctx->qry.vpath.
 547          * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
 548          */
 549         ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
 550
 551         if (cmd->want_repo && !ctx->repo) {
 552                 cgit_print_http_headers(ctx);
 553                 cgit_print_docstart(ctx);
 554                 cgit_print_pageheader(ctx);
 555                 cgit_print_error(fmt("No repository selected"));
 556                 cgit_print_docend();
 557                 return;
 558         }
 559
 560         if (ctx->repo && prepare_repo_cmd(ctx))
 561                 return;
 562
 563         if (cmd->want_layout) {
 564                 cgit_print_http_headers(ctx);
 565                 cgit_print_docstart(ctx);
 566                 cgit_print_pageheader(ctx);
 567         }
 568
 569         cmd->fn(ctx);
 570
 571         if (cmd->want_layout)
 572                 cgit_print_docend();
 573 }
 574
 575 static int cmp_repos(const void *a, const void *b)
 576 {
 577         const struct cgit_repo *ra = a, *rb = b;
 578         return strcmp(ra->url, rb->url);
 579 }
 580
 581 static char *build_snapshot_setting(int bitmap)
 582 {
 583         const struct cgit_snapshot_format *f;
 584         char *result = xstrdup("");
 585         char *tmp;
 586         int len;
 587
 588         for (f = cgit_snapshot_formats; f->suffix; f++) {
 589                 if (f->bit & bitmap) {
 590                         tmp = result;
 591                         result = xstrdup(fmt("%s%s ", tmp, f->suffix));
 592                         free(tmp);
 593                 }
 594         }
 595         len = strlen(result);
 596         if (len)
 597                 result[len - 1] = '\0';
 598         return result;
 599 }
 600
 601 static char *get_first_line(char *txt)
 602 {
 603         char *t = xstrdup(txt);
 604         char *p = strchr(t, '\n');
 605         if (p)
 606                 *p = '\0';
 607         return t;
 608 }
 609
 610 static void print_repo(FILE *f, struct cgit_repo *repo)
 611 {
 612         fprintf(f, "repo.url=%s\n", repo->url);
 613         fprintf(f, "repo.name=%s\n", repo->name);
 614         fprintf(f, "repo.path=%s\n", repo->path);
 615         if (repo->owner)
 616                 fprintf(f, "repo.owner=%s\n", repo->owner);
 617         if (repo->desc) {
 618                 char *tmp = get_first_line(repo->desc);
 619                 fprintf(f, "repo.desc=%s\n", tmp);
 620                 free(tmp);
 621         }
 622         if (repo->readme)
 623                 fprintf(f, "repo.readme=%s\n", repo->readme);
 624         if (repo->defbranch)
 625                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 626         if (repo->module_link)
 627                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 628         if (repo->section)
 629                 fprintf(f, "repo.section=%s\n", repo->section);
 630         if (repo->clone_url)
 631                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 632         fprintf(f, "repo.enable-commit-graph=%d\n",
 633                 repo->enable_commit_graph);
 634         fprintf(f, "repo.enable-log-filecount=%d\n",
 635                 repo->enable_log_filecount);
 636         fprintf(f, "repo.enable-log-linecount=%d\n",
 637                 repo->enable_log_linecount);
 638         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 639                 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
 640         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 641                 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
 642         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 643                 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
 644         if (repo->snapshots != ctx.cfg.snapshots) {
 645                 char *tmp = build_snapshot_setting(repo->snapshots);
 646                 fprintf(f, "repo.snapshots=%s\n", tmp);
 647                 free(tmp);
 648         }
 649         if (repo->max_stats != ctx.cfg.max_stats)
 650                 fprintf(f, "repo.max-stats=%s\n",
 651                         cgit_find_stats_periodname(repo->max_stats));
 652         fprintf(f, "\n");
 653 }
 654
 655 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 656 {
 657         int i;
 658
 659         for (i = start; i < list->count; i++)
 660                 print_repo(f, &list->repos[i]);
 661 }
 662
 663 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 664  * and return 0 on success.
 665  */
 666 static int generate_cached_repolist(const char *path, const char *cached_rc)
 667 {
 668         char *locked_rc;
 669         int idx;
 670         FILE *f;
 671
 672         locked_rc = xstrdup(fmt("%s.lock", cached_rc));
 673         f = fopen(locked_rc, "wx");
 674         if (!f) {
 675                 /* Inform about the error unless the lockfile already existed,
 676                  * since that only means we've got concurrent requests.
 677                  */
 678                 if (errno != EEXIST)
 679                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 680                                 locked_rc, strerror(errno), errno);
 681                 return errno;
 682         }
 683         idx = cgit_repolist.count;
 684         if (ctx.cfg.project_list)
 685                 scan_projects(path, ctx.cfg.project_list, repo_config);
 686         else
 687                 scan_tree(path, repo_config);
 688         print_repolist(f, &cgit_repolist, idx);
 689         if (rename(locked_rc, cached_rc))
 690                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 691                         locked_rc, cached_rc, strerror(errno), errno);
 692         fclose(f);
 693         return 0;
 694 }
 695
 696 static void process_cached_repolist(const char *path)
 697 {
 698         struct stat st;
 699         char *cached_rc;
 700         time_t age;
 701         unsigned long hash;
 702
 703         hash = hash_str(path);
 704         if (ctx.cfg.project_list)
 705                 hash += hash_str(ctx.cfg.project_list);
 706         cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
 707
 708         if (stat(cached_rc, &st)) {
 709                 /* Nothing is cached, we need to scan without forking. And
 710                  * if we fail to generate a cached repolist, we need to
 711                  * invoke scan_tree manually.
 712                  */
 713                 if (generate_cached_repolist(path, cached_rc)) {
 714                         if (ctx.cfg.project_list)
 715                                 scan_projects(path, ctx.cfg.project_list,
 716                                               repo_config);
 717                         else
 718                                 scan_tree(path, repo_config);
 719                 }
 720                 return;
 721         }
 722
 723         parse_configfile(cached_rc, config_cb);
 724
 725         /* If the cached configfile hasn't expired, lets exit now */
 726         age = time(NULL) - st.st_mtime;
 727         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 728                 return;
 729
 730         /* The cached repolist has been parsed, but it was old. So lets
 731          * rescan the specified path and generate a new cached repolist
 732          * in a child-process to avoid latency for the current request.
 733          */
 734         if (fork())
 735                 return;
 736
 737         exit(generate_cached_repolist(path, cached_rc));
 738 }
 739
 740 static void cgit_parse_args(int argc, const char **argv)
 741 {
 742         int i;
 743         int scan = 0;
 744
 745         for (i = 1; i < argc; i++) {
 746                 if (!strncmp(argv[i], "--cache=", 8)) {
 747                         ctx.cfg.cache_root = xstrdup(argv[i] + 8);
 748                 }
 749                 if (!strcmp(argv[i], "--nocache")) {
 750                         ctx.cfg.nocache = 1;
 751                 }
 752                 if (!strcmp(argv[i], "--nohttp")) {
 753                         ctx.env.no_http = "1";
 754                 }
 755                 if (!strncmp(argv[i], "--query=", 8)) {
 756                         ctx.qry.raw = xstrdup(argv[i] + 8);
 757                 }
 758                 if (!strncmp(argv[i], "--repo=", 7)) {
 759                         ctx.qry.repo = xstrdup(argv[i] + 7);
 760                 }
 761                 if (!strncmp(argv[i], "--page=", 7)) {
 762                         ctx.qry.page = xstrdup(argv[i] + 7);
 763                 }
 764                 if (!strncmp(argv[i], "--head=", 7)) {
 765                         ctx.qry.head = xstrdup(argv[i] + 7);
 766                         ctx.qry.has_symref = 1;
 767                 }
 768                 if (!strncmp(argv[i], "--sha1=", 7)) {
 769                         ctx.qry.sha1 = xstrdup(argv[i] + 7);
 770                         ctx.qry.has_sha1 = 1;
 771                 }
 772                 if (!strncmp(argv[i], "--ofs=", 6)) {
 773                         ctx.qry.ofs = atoi(argv[i] + 6);
 774                 }
 775                 if (!strncmp(argv[i], "--scan-tree=", 12) ||
 776                     !strncmp(argv[i], "--scan-path=", 12)) {
 777                         /* HACK: the global snapshot bitmask defines the
 778                          * set of allowed snapshot formats, but the config
 779                          * file hasn't been parsed yet so the mask is
 780                          * currently 0. By setting all bits high before
 781                          * scanning we make sure that any in-repo cgitrc
 782                          * snapshot setting is respected by scan_tree().
 783                          * BTW: we assume that there'll never be more than
 784                          * 255 different snapshot formats supported by cgit...
 785                          */
 786                         ctx.cfg.snapshots = 0xFF;
 787                         scan++;
 788                         scan_tree(argv[i] + 12, repo_config);
 789                 }
 790         }
 791         if (scan) {
 792                 qsort(cgit_repolist.repos, cgit_repolist.count,
 793                         sizeof(struct cgit_repo), cmp_repos);
 794                 print_repolist(stdout, &cgit_repolist, 0);
 795                 exit(0);
 796         }
 797 }
 798
 799 static int calc_ttl()
 800 {
 801         if (!ctx.repo)
 802                 return ctx.cfg.cache_root_ttl;
 803
 804         if (!ctx.qry.page)
 805                 return ctx.cfg.cache_repo_ttl;
 806
 807         if (ctx.qry.has_symref)
 808                 return ctx.cfg.cache_dynamic_ttl;
 809
 810         if (ctx.qry.has_sha1)
 811                 return ctx.cfg.cache_static_ttl;
 812
 813         return ctx.cfg.cache_repo_ttl;
 814 }
 815
 816 int main(int argc, const char **argv)
 817 {
 818         const char *path;
 819         char *qry;
 820         int err, ttl;
 821
 822         prepare_context(&ctx);
 823         cgit_repolist.length = 0;
 824         cgit_repolist.count = 0;
 825         cgit_repolist.repos = NULL;
 826
 827         cgit_parse_args(argc, argv);
 828         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
 829         ctx.repo = NULL;
 830         http_parse_querystring(ctx.qry.raw, querystring_cb);
 831
 832         /* If virtual-root isn't specified in cgitrc, lets pretend
 833          * that virtual-root equals SCRIPT_NAME, minus any possibly
 834          * trailing slashes.
 835          */
 836         if (!ctx.cfg.virtual_root && ctx.cfg.script_name) {
 837                 ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
 838                 if (!ctx.cfg.virtual_root)
 839                         ctx.cfg.virtual_root = "";
 840         }
 841
 842         /* If no url parameter is specified on the querystring, lets
 843          * use PATH_INFO as url. This allows cgit to work with virtual
 844          * urls without the need for rewriterules in the webserver (as
 845          * long as PATH_INFO is included in the cache lookup key).
 846          */
 847         path = ctx.env.path_info;
 848         if (!ctx.qry.url && path) {
 849                 if (path[0] == '/')
 850                         path++;
 851                 ctx.qry.url = xstrdup(path);
 852                 if (ctx.qry.raw) {
 853                         qry = ctx.qry.raw;
 854                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 855                         free(qry);
 856                 } else
 857                         ctx.qry.raw = xstrdup(ctx.qry.url);
 858                 cgit_parse_url(ctx.qry.url);
 859         }
 860
 861         ttl = calc_ttl();
 862         ctx.page.expires += ttl * 60;
 863         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 864                 ctx.cfg.nocache = 1;
 865         if (ctx.cfg.nocache)
 866                 ctx.cfg.cache_size = 0;
 867         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 868                             ctx.qry.raw, ttl, process_request, &ctx);
 869         if (err)
 870                 cgit_print_error(fmt("Error processing page: %s (%d)",
 871                                      strerror(err), err));
 872         return err;
 873 }