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