cgit.c

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