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