cgit.c

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