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