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