cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   4  * Copyright (C) 2010 Jason A. Donenfeld <Jason@zx2c4.com>
   5  *
   6  * Licensed under GNU General Public License v2
   7  *   (see COPYING for full license text)
   8  */
   9
  10 #include "cgit.h"
  11 #include "cache.h"
  12 #include "cmd.h"
  13 #include "configfile.h"
  14 #include "html.h"
  15 #include "ui-shared.h"
  16 #include "ui-stats.h"
  17 #include "scan-tree.h"
  18
  19 const char *cgit_version = CGIT_VERSION;
  20
  21 void add_mimetype(const char *name, const char *value)
  22 {
  23         struct string_list_item *item;
  24
  25         item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
  26         item->util = xstrdup(value);
  27 }
  28
  29 struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
  30 {
  31         struct cgit_filter *f;
  32         int extra_args;
  33
  34         if (!cmd || !cmd[0])
  35                 return NULL;
  36
  37         switch (filtertype) {
  38                 case SOURCE:
  39                         extra_args = 1;
  40                         break;
  41
  42                 case ABOUT:
  43                 case COMMIT:
  44                 default:
  45                         extra_args = 0;
  46                         break;
  47         }
  48
  49         f = xmalloc(sizeof(struct cgit_filter));
  50         f->cmd = xstrdup(cmd);
  51         f->argv = xmalloc((2 + extra_args) * sizeof(char *));
  52         f->argv[0] = f->cmd;
  53         f->argv[1] = NULL;
  54         return f;
  55 }
  56
  57 static void process_cached_repolist(const char *path);
  58
  59 void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  60 {
  61         if (!strcmp(name, "name"))
  62                 repo->name = xstrdup(value);
  63         else if (!strcmp(name, "clone-url"))
  64                 repo->clone_url = xstrdup(value);
  65         else if (!strcmp(name, "desc"))
  66                 repo->desc = xstrdup(value);
  67         else if (!strcmp(name, "owner"))
  68                 repo->owner = xstrdup(value);
  69         else if (!strcmp(name, "defbranch"))
  70                 repo->defbranch = xstrdup(value);
  71         else if (!strcmp(name, "snapshots"))
  72                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  73         else if (!strcmp(name, "enable-commit-graph"))
  74                 repo->enable_commit_graph = ctx.cfg.enable_commit_graph * atoi(value);
  75         else if (!strcmp(name, "enable-log-filecount"))
  76                 repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
  77         else if (!strcmp(name, "enable-log-linecount"))
  78                 repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
  79         else if (!strcmp(name, "enable-remote-branches"))
  80                 repo->enable_remote_branches = atoi(value);
  81         else if (!strcmp(name, "enable-subject-links"))
  82                 repo->enable_subject_links = atoi(value);
  83         else if (!strcmp(name, "max-stats"))
  84                 repo->max_stats = cgit_find_stats_period(value, NULL);
  85         else if (!strcmp(name, "module-link"))
  86                 repo->module_link= xstrdup(value);
  87         else if (!strcmp(name, "section"))
  88                 repo->section = xstrdup(value);
  89         else if (!strcmp(name, "readme") && value != NULL)
  90                 repo->readme = xstrdup(value);
  91         else if (!strcmp(name, "logo") && value != NULL)
  92                 repo->logo = xstrdup(value);
  93         else if (!strcmp(name, "logo-link") && value != NULL)
  94                 repo->logo_link = xstrdup(value);
  95         else if (ctx.cfg.enable_filter_overrides) {
  96                 if (!strcmp(name, "about-filter"))
  97                         repo->about_filter = new_filter(value, ABOUT);
  98                 else if (!strcmp(name, "commit-filter"))
  99                         repo->commit_filter = new_filter(value, COMMIT);
 100                 else if (!strcmp(name, "source-filter"))
 101                         repo->source_filter = new_filter(value, SOURCE);
 102         }
 103 }
 104
 105 void config_cb(const char *name, const char *value)
 106 {
 107         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 108                 ctx.cfg.section = xstrdup(value);
 109         else if (!strcmp(name, "repo.url"))
 110                 ctx.repo = cgit_add_repo(value);
 111         else if (ctx.repo && !strcmp(name, "repo.path"))
 112                 ctx.repo->path = trim_end(value, '/');
 113         else if (ctx.repo && !prefixcmp(name, "repo."))
 114                 repo_config(ctx.repo, name + 5, value);
 115         else if (!strcmp(name, "readme"))
 116                 ctx.cfg.readme = xstrdup(value);
 117         else if (!strcmp(name, "root-title"))
 118                 ctx.cfg.root_title = xstrdup(value);
 119         else if (!strcmp(name, "root-desc"))
 120                 ctx.cfg.root_desc = xstrdup(value);
 121         else if (!strcmp(name, "root-readme"))
 122                 ctx.cfg.root_readme = xstrdup(value);
 123         else if (!strcmp(name, "css"))
 124                 ctx.cfg.css = xstrdup(value);
 125         else if (!strcmp(name, "favicon"))
 126                 ctx.cfg.favicon = xstrdup(value);
 127         else if (!strcmp(name, "footer"))
 128                 ctx.cfg.footer = xstrdup(value);
 129         else if (!strcmp(name, "head-include"))
 130                 ctx.cfg.head_include = xstrdup(value);
 131         else if (!strcmp(name, "header"))
 132                 ctx.cfg.header = xstrdup(value);
 133         else if (!strcmp(name, "logo"))
 134                 ctx.cfg.logo = xstrdup(value);
 135         else if (!strcmp(name, "index-header"))
 136                 ctx.cfg.index_header = xstrdup(value);
 137         else if (!strcmp(name, "index-info"))
 138                 ctx.cfg.index_info = xstrdup(value);
 139         else if (!strcmp(name, "logo-link"))
 140                 ctx.cfg.logo_link = xstrdup(value);
 141         else if (!strcmp(name, "module-link"))
 142                 ctx.cfg.module_link = xstrdup(value);
 143         else if (!strcmp(name, "strict-export"))
 144                 ctx.cfg.strict_export = xstrdup(value);
 145         else if (!strcmp(name, "virtual-root")) {
 146                 ctx.cfg.virtual_root = trim_end(value, '/');
 147                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
 148                         ctx.cfg.virtual_root = "";
 149         } else if (!strcmp(name, "nocache"))
 150                 ctx.cfg.nocache = atoi(value);
 151         else if (!strcmp(name, "noplainemail"))
 152                 ctx.cfg.noplainemail = atoi(value);
 153         else if (!strcmp(name, "noheader"))
 154                 ctx.cfg.noheader = atoi(value);
 155         else if (!strcmp(name, "snapshots"))
 156                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 157         else if (!strcmp(name, "enable-filter-overrides"))
 158                 ctx.cfg.enable_filter_overrides = atoi(value);
 159         else if (!strcmp(name, "enable-gitweb-owner"))
 160                 ctx.cfg.enable_gitweb_owner = atoi(value);
 161         else if (!strcmp(name, "enable-index-links"))
 162                 ctx.cfg.enable_index_links = atoi(value);
 163         else if (!strcmp(name, "enable-commit-graph"))
 164                 ctx.cfg.enable_commit_graph = atoi(value);
 165         else if (!strcmp(name, "enable-log-filecount"))
 166                 ctx.cfg.enable_log_filecount = atoi(value);
 167         else if (!strcmp(name, "enable-log-linecount"))
 168                 ctx.cfg.enable_log_linecount = atoi(value);
 169         else if (!strcmp(name, "enable-remote-branches"))
 170                 ctx.cfg.enable_remote_branches = atoi(value);
 171         else if (!strcmp(name, "enable-subject-links"))
 172                 ctx.cfg.enable_subject_links = atoi(value);
 173         else if (!strcmp(name, "enable-tree-linenumbers"))
 174                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 175         else if (!strcmp(name, "max-stats"))
 176                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 177         else if (!strcmp(name, "cache-size"))
 178                 ctx.cfg.cache_size = atoi(value);
 179         else if (!strcmp(name, "cache-root"))
 180                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 181         else if (!strcmp(name, "cache-root-ttl"))
 182                 ctx.cfg.cache_root_ttl = atoi(value);
 183         else if (!strcmp(name, "cache-repo-ttl"))
 184                 ctx.cfg.cache_repo_ttl = atoi(value);
 185         else if (!strcmp(name, "cache-scanrc-ttl"))
 186                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 187         else if (!strcmp(name, "cache-static-ttl"))
 188                 ctx.cfg.cache_static_ttl = atoi(value);
 189         else if (!strcmp(name, "cache-dynamic-ttl"))
 190                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 191         else if (!strcmp(name, "about-filter"))
 192                 ctx.cfg.about_filter = new_filter(value, ABOUT);
 193         else if (!strcmp(name, "commit-filter"))
 194                 ctx.cfg.commit_filter = new_filter(value, COMMIT);
 195         else if (!strcmp(name, "embedded"))
 196                 ctx.cfg.embedded = atoi(value);
 197         else if (!strcmp(name, "max-atom-items"))
 198                 ctx.cfg.max_atom_items = atoi(value);
 199         else if (!strcmp(name, "max-message-length"))
 200                 ctx.cfg.max_msg_len = atoi(value);
 201         else if (!strcmp(name, "max-repodesc-length"))
 202                 ctx.cfg.max_repodesc_len = atoi(value);
 203         else if (!strcmp(name, "max-blob-size"))
 204                 ctx.cfg.max_blob_size = atoi(value);
 205         else if (!strcmp(name, "max-repo-count"))
 206                 ctx.cfg.max_repo_count = atoi(value);
 207         else if (!strcmp(name, "max-commit-count"))
 208                 ctx.cfg.max_commit_count = atoi(value);
 209         else if (!strcmp(name, "project-list"))
 210                 ctx.cfg.project_list = xstrdup(expand_macros(value));
 211         else if (!strcmp(name, "scan-path"))
 212                 if (!ctx.cfg.nocache && ctx.cfg.cache_size)
 213                         process_cached_repolist(expand_macros(value));
 214                 else if (ctx.cfg.project_list)
 215                         scan_projects(expand_macros(value),
 216                                       ctx.cfg.project_list, repo_config);
 217                 else
 218                         scan_tree(expand_macros(value), repo_config);
 219         else if (!strcmp(name, "scan-hidden-path"))
 220                 ctx.cfg.scan_hidden_path = atoi(value);
 221         else if (!strcmp(name, "section-from-path"))
 222                 ctx.cfg.section_from_path = atoi(value);
 223         else if (!strcmp(name, "source-filter"))
 224                 ctx.cfg.source_filter = new_filter(value, SOURCE);
 225         else if (!strcmp(name, "summary-log"))
 226                 ctx.cfg.summary_log = atoi(value);
 227         else if (!strcmp(name, "summary-branches"))
 228                 ctx.cfg.summary_branches = atoi(value);
 229         else if (!strcmp(name, "summary-tags"))
 230                 ctx.cfg.summary_tags = atoi(value);
 231         else if (!strcmp(name, "side-by-side-diffs"))
 232                 ctx.cfg.ssdiff = atoi(value);
 233         else if (!strcmp(name, "agefile"))
 234                 ctx.cfg.agefile = xstrdup(value);
 235         else if (!strcmp(name, "renamelimit"))
 236                 ctx.cfg.renamelimit = atoi(value);
 237         else if (!strcmp(name, "remove-suffix"))
 238                 ctx.cfg.remove_suffix = atoi(value);
 239         else if (!strcmp(name, "robots"))
 240                 ctx.cfg.robots = xstrdup(value);
 241         else if (!strcmp(name, "clone-prefix"))
 242                 ctx.cfg.clone_prefix = xstrdup(value);
 243         else if (!strcmp(name, "local-time"))
 244                 ctx.cfg.local_time = atoi(value);
 245         else if (!prefixcmp(name, "mimetype."))
 246                 add_mimetype(name + 9, value);
 247         else if (!strcmp(name, "include"))
 248                 parse_configfile(expand_macros(value), config_cb);
 249 }
 250
 251 static void querystring_cb(const char *name, const char *value)
 252 {
 253         if (!value)
 254                 value = "";
 255
 256         if (!strcmp(name,"r")) {
 257                 ctx.qry.repo = xstrdup(value);
 258                 ctx.repo = cgit_get_repoinfo(value);
 259         } else if (!strcmp(name, "p")) {
 260                 ctx.qry.page = xstrdup(value);
 261         } else if (!strcmp(name, "url")) {
 262                 if (*value == '/')
 263                         value++;
 264                 ctx.qry.url = xstrdup(value);
 265                 cgit_parse_url(value);
 266         } else if (!strcmp(name, "qt")) {
 267                 ctx.qry.grep = xstrdup(value);
 268         } else if (!strcmp(name, "q")) {
 269                 ctx.qry.search = xstrdup(value);
 270         } else if (!strcmp(name, "h")) {
 271                 ctx.qry.head = xstrdup(value);
 272                 ctx.qry.has_symref = 1;
 273         } else if (!strcmp(name, "id")) {
 274                 ctx.qry.sha1 = xstrdup(value);
 275                 ctx.qry.has_sha1 = 1;
 276         } else if (!strcmp(name, "id2")) {
 277                 ctx.qry.sha2 = xstrdup(value);
 278                 ctx.qry.has_sha1 = 1;
 279         } else if (!strcmp(name, "ofs")) {
 280                 ctx.qry.ofs = atoi(value);
 281         } else if (!strcmp(name, "path")) {
 282                 ctx.qry.path = trim_end(value, '/');
 283         } else if (!strcmp(name, "name")) {
 284                 ctx.qry.name = xstrdup(value);
 285         } else if (!strcmp(name, "mimetype")) {
 286                 ctx.qry.mimetype = xstrdup(value);
 287         } else if (!strcmp(name, "s")){
 288                 ctx.qry.sort = xstrdup(value);
 289         } else if (!strcmp(name, "showmsg")) {
 290                 ctx.qry.showmsg = atoi(value);
 291         } else if (!strcmp(name, "period")) {
 292                 ctx.qry.period = xstrdup(value);
 293         } else if (!strcmp(name, "ss")) {
 294                 ctx.qry.ssdiff = atoi(value);
 295         } else if (!strcmp(name, "all")) {
 296                 ctx.qry.show_all = atoi(value);
 297         } else if (!strcmp(name, "context")) {
 298                 ctx.qry.context = atoi(value);
 299         } else if (!strcmp(name, "ignorews")) {
 300                 ctx.qry.ignorews = atoi(value);
 301         }
 302 }
 303
 304 char *xstrdupn(const char *str)
 305 {
 306         return (str ? xstrdup(str) : NULL);
 307 }
 308
 309 static void prepare_context(struct cgit_context *ctx)
 310 {
 311         memset(ctx, 0, sizeof(*ctx));
 312         ctx->cfg.agefile = "info/web/last-modified";
 313         ctx->cfg.nocache = 0;
 314         ctx->cfg.cache_size = 0;
 315         ctx->cfg.cache_dynamic_ttl = 5;
 316         ctx->cfg.cache_max_create_time = 5;
 317         ctx->cfg.cache_repo_ttl = 5;
 318         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 319         ctx->cfg.cache_root_ttl = 5;
 320         ctx->cfg.cache_scanrc_ttl = 15;
 321         ctx->cfg.cache_static_ttl = -1;
 322         ctx->cfg.css = "/cgit.css";
 323         ctx->cfg.logo = "/cgit.png";
 324         ctx->cfg.local_time = 0;
 325         ctx->cfg.enable_gitweb_owner = 1;
 326         ctx->cfg.enable_tree_linenumbers = 1;
 327         ctx->cfg.max_repo_count = 50;
 328         ctx->cfg.max_commit_count = 50;
 329         ctx->cfg.max_lock_attempts = 5;
 330         ctx->cfg.max_msg_len = 80;
 331         ctx->cfg.max_repodesc_len = 80;
 332         ctx->cfg.max_blob_size = 0;
 333         ctx->cfg.max_stats = 0;
 334         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
 335         ctx->cfg.project_list = NULL;
 336         ctx->cfg.renamelimit = -1;
 337         ctx->cfg.remove_suffix = 0;
 338         ctx->cfg.robots = "index, nofollow";
 339         ctx->cfg.root_title = "Git repository browser";
 340         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 341         ctx->cfg.scan_hidden_path = 0;
 342         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 343         ctx->cfg.section = "";
 344         ctx->cfg.summary_branches = 10;
 345         ctx->cfg.summary_log = 10;
 346         ctx->cfg.summary_tags = 10;
 347         ctx->cfg.max_atom_items = 10;
 348         ctx->cfg.ssdiff = 0;
 349         ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
 350         ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
 351         ctx->env.https = xstrdupn(getenv("HTTPS"));
 352         ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
 353         ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
 354         ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
 355         ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
 356         ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
 357         ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
 358         ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
 359         ctx->page.mimetype = "text/html";
 360         ctx->page.charset = PAGE_ENCODING;
 361         ctx->page.filename = NULL;
 362         ctx->page.size = 0;
 363         ctx->page.modified = time(NULL);
 364         ctx->page.expires = ctx->page.modified;
 365         ctx->page.etag = NULL;
 366         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 367         if (ctx->env.script_name)
 368                 ctx->cfg.script_name = ctx->env.script_name;
 369         if (ctx->env.query_string)
 370                 ctx->qry.raw = ctx->env.query_string;
 371         if (!ctx->env.cgit_config)
 372                 ctx->env.cgit_config = CGIT_CONFIG;
 373 }
 374
 375 struct refmatch {
 376         char *req_ref;
 377         char *first_ref;
 378         int match;
 379 };
 380
 381 int find_current_ref(const char *refname, const unsigned char *sha1,
 382                      int flags, void *cb_data)
 383 {
 384         struct refmatch *info;
 385
 386         info = (struct refmatch *)cb_data;
 387         if (!strcmp(refname, info->req_ref))
 388                 info->match = 1;
 389         if (!info->first_ref)
 390                 info->first_ref = xstrdup(refname);
 391         return info->match;
 392 }
 393
 394 char *find_default_branch(struct cgit_repo *repo)
 395 {
 396         struct refmatch info;
 397         char *ref;
 398
 399         info.req_ref = repo->defbranch;
 400         info.first_ref = NULL;
 401         info.match = 0;
 402         for_each_branch_ref(find_current_ref, &info);
 403         if (info.match)
 404                 ref = info.req_ref;
 405         else
 406                 ref = info.first_ref;
 407         if (ref)
 408                 ref = xstrdup(ref);
 409         return ref;
 410 }
 411
 412 static int prepare_repo_cmd(struct cgit_context *ctx)
 413 {
 414         char *tmp;
 415         unsigned char sha1[20];
 416         int nongit = 0;
 417
 418         setenv("GIT_DIR", ctx->repo->path, 1);
 419         setup_git_directory_gently(&nongit);
 420         if (nongit) {
 421                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 422                                       "config error");
 423                 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
 424                 ctx->repo = NULL;
 425                 cgit_print_http_headers(ctx);
 426                 cgit_print_docstart(ctx);
 427                 cgit_print_pageheader(ctx);
 428                 cgit_print_error(tmp);
 429                 cgit_print_docend();
 430                 return 1;
 431         }
 432         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 433
 434         if (!ctx->qry.head) {
 435                 ctx->qry.nohead = 1;
 436                 ctx->qry.head = find_default_branch(ctx->repo);
 437                 ctx->repo->defbranch = ctx->qry.head;
 438         }
 439
 440         if (!ctx->qry.head) {
 441                 cgit_print_http_headers(ctx);
 442                 cgit_print_docstart(ctx);
 443                 cgit_print_pageheader(ctx);
 444                 cgit_print_error("Repository seems to be empty");
 445                 cgit_print_docend();
 446                 return 1;
 447         }
 448
 449         if (get_sha1(ctx->qry.head, sha1)) {
 450                 tmp = xstrdup(ctx->qry.head);
 451                 ctx->qry.head = ctx->repo->defbranch;
 452                 ctx->page.status = 404;
 453                 ctx->page.statusmsg = "not found";
 454                 cgit_print_http_headers(ctx);
 455                 cgit_print_docstart(ctx);
 456                 cgit_print_pageheader(ctx);
 457                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 458                 cgit_print_docend();
 459                 return 1;
 460         }
 461         return 0;
 462 }
 463
 464 static void process_request(void *cbdata)
 465 {
 466         struct cgit_context *ctx = cbdata;
 467         struct cgit_cmd *cmd;
 468
 469         cmd = cgit_get_cmd(ctx);
 470         if (!cmd) {
 471                 ctx->page.title = "cgit error";
 472                 cgit_print_http_headers(ctx);
 473                 cgit_print_docstart(ctx);
 474                 cgit_print_pageheader(ctx);
 475                 cgit_print_error("Invalid request");
 476                 cgit_print_docend();
 477                 return;
 478         }
 479
 480         /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
 481          * in-project path limit to be made available at ctx->qry.vpath.
 482          * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
 483          */
 484         ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
 485
 486         if (cmd->want_repo && !ctx->repo) {
 487                 cgit_print_http_headers(ctx);
 488                 cgit_print_docstart(ctx);
 489                 cgit_print_pageheader(ctx);
 490                 cgit_print_error(fmt("No repository selected"));
 491                 cgit_print_docend();
 492                 return;
 493         }
 494
 495         if (ctx->repo && prepare_repo_cmd(ctx))
 496                 return;
 497
 498         if (cmd->want_layout) {
 499                 cgit_print_http_headers(ctx);
 500                 cgit_print_docstart(ctx);
 501                 cgit_print_pageheader(ctx);
 502         }
 503
 504         cmd->fn(ctx);
 505
 506         if (cmd->want_layout)
 507                 cgit_print_docend();
 508 }
 509
 510 int cmp_repos(const void *a, const void *b)
 511 {
 512         const struct cgit_repo *ra = a, *rb = b;
 513         return strcmp(ra->url, rb->url);
 514 }
 515
 516 char *build_snapshot_setting(int bitmap)
 517 {
 518         const struct cgit_snapshot_format *f;
 519         char *result = xstrdup("");
 520         char *tmp;
 521         int len;
 522
 523         for (f = cgit_snapshot_formats; f->suffix; f++) {
 524                 if (f->bit & bitmap) {
 525                         tmp = result;
 526                         result = xstrdup(fmt("%s%s ", tmp, f->suffix));
 527                         free(tmp);
 528                 }
 529         }
 530         len = strlen(result);
 531         if (len)
 532                 result[len - 1] = '\0';
 533         return result;
 534 }
 535
 536 char *get_first_line(char *txt)
 537 {
 538         char *t = xstrdup(txt);
 539         char *p = strchr(t, '\n');
 540         if (p)
 541                 *p = '\0';
 542         return t;
 543 }
 544
 545 void print_repo(FILE *f, struct cgit_repo *repo)
 546 {
 547         fprintf(f, "repo.url=%s\n", repo->url);
 548         fprintf(f, "repo.name=%s\n", repo->name);
 549         fprintf(f, "repo.path=%s\n", repo->path);
 550         if (repo->owner)
 551                 fprintf(f, "repo.owner=%s\n", repo->owner);
 552         if (repo->desc) {
 553                 char *tmp = get_first_line(repo->desc);
 554                 fprintf(f, "repo.desc=%s\n", tmp);
 555                 free(tmp);
 556         }
 557         if (repo->readme)
 558                 fprintf(f, "repo.readme=%s\n", repo->readme);
 559         if (repo->defbranch)
 560                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 561         if (repo->module_link)
 562                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 563         if (repo->section)
 564                 fprintf(f, "repo.section=%s\n", repo->section);
 565         if (repo->clone_url)
 566                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 567         fprintf(f, "repo.enable-commit-graph=%d\n",
 568                 repo->enable_commit_graph);
 569         fprintf(f, "repo.enable-log-filecount=%d\n",
 570                 repo->enable_log_filecount);
 571         fprintf(f, "repo.enable-log-linecount=%d\n",
 572                 repo->enable_log_linecount);
 573         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 574                 fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
 575         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 576                 fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
 577         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 578                 fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
 579         if (repo->snapshots != ctx.cfg.snapshots) {
 580                 char *tmp = build_snapshot_setting(repo->snapshots);
 581                 fprintf(f, "repo.snapshots=%s\n", tmp);
 582                 free(tmp);
 583         }
 584         if (repo->max_stats != ctx.cfg.max_stats)
 585                 fprintf(f, "repo.max-stats=%s\n",
 586                         cgit_find_stats_periodname(repo->max_stats));
 587         fprintf(f, "\n");
 588 }
 589
 590 void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 591 {
 592         int i;
 593
 594         for(i = start; i < list->count; i++)
 595                 print_repo(f, &list->repos[i]);
 596 }
 597
 598 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 599  * and return 0 on success.
 600  */
 601 static int generate_cached_repolist(const char *path, const char *cached_rc)
 602 {
 603         char *locked_rc;
 604         int idx;
 605         FILE *f;
 606
 607         locked_rc = xstrdup(fmt("%s.lock", cached_rc));
 608         f = fopen(locked_rc, "wx");
 609         if (!f) {
 610                 /* Inform about the error unless the lockfile already existed,
 611                  * since that only means we've got concurrent requests.
 612                  */
 613                 if (errno != EEXIST)
 614                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 615                                 locked_rc, strerror(errno), errno);
 616                 return errno;
 617         }
 618         idx = cgit_repolist.count;
 619         if (ctx.cfg.project_list)
 620                 scan_projects(path, ctx.cfg.project_list, repo_config);
 621         else
 622                 scan_tree(path, repo_config);
 623         print_repolist(f, &cgit_repolist, idx);
 624         if (rename(locked_rc, cached_rc))
 625                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 626                         locked_rc, cached_rc, strerror(errno), errno);
 627         fclose(f);
 628         return 0;
 629 }
 630
 631 static void process_cached_repolist(const char *path)
 632 {
 633         struct stat st;
 634         char *cached_rc;
 635         time_t age;
 636         unsigned long hash;
 637
 638         hash = hash_str(path);
 639         if (ctx.cfg.project_list)
 640                 hash += hash_str(ctx.cfg.project_list);
 641         cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
 642
 643         if (stat(cached_rc, &st)) {
 644                 /* Nothing is cached, we need to scan without forking. And
 645                  * if we fail to generate a cached repolist, we need to
 646                  * invoke scan_tree manually.
 647                  */
 648                 if (generate_cached_repolist(path, cached_rc)) {
 649                         if (ctx.cfg.project_list)
 650                                 scan_projects(path, ctx.cfg.project_list,
 651                                               repo_config);
 652                         else
 653                                 scan_tree(path, repo_config);
 654                 }
 655                 return;
 656         }
 657
 658         parse_configfile(cached_rc, config_cb);
 659
 660         /* If the cached configfile hasn't expired, lets exit now */
 661         age = time(NULL) - st.st_mtime;
 662         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 663                 return;
 664
 665         /* The cached repolist has been parsed, but it was old. So lets
 666          * rescan the specified path and generate a new cached repolist
 667          * in a child-process to avoid latency for the current request.
 668          */
 669         if (fork())
 670                 return;
 671
 672         exit(generate_cached_repolist(path, cached_rc));
 673 }
 674
 675 static void cgit_parse_args(int argc, const char **argv)
 676 {
 677         int i;
 678         int scan = 0;
 679
 680         for (i = 1; i < argc; i++) {
 681                 if (!strncmp(argv[i], "--cache=", 8)) {
 682                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 683                 }
 684                 if (!strcmp(argv[i], "--nocache")) {
 685                         ctx.cfg.nocache = 1;
 686                 }
 687                 if (!strcmp(argv[i], "--nohttp")) {
 688                         ctx.env.no_http = "1";
 689                 }
 690                 if (!strncmp(argv[i], "--query=", 8)) {
 691                         ctx.qry.raw = xstrdup(argv[i]+8);
 692                 }
 693                 if (!strncmp(argv[i], "--repo=", 7)) {
 694                         ctx.qry.repo = xstrdup(argv[i]+7);
 695                 }
 696                 if (!strncmp(argv[i], "--page=", 7)) {
 697                         ctx.qry.page = xstrdup(argv[i]+7);
 698                 }
 699                 if (!strncmp(argv[i], "--head=", 7)) {
 700                         ctx.qry.head = xstrdup(argv[i]+7);
 701                         ctx.qry.has_symref = 1;
 702                 }
 703                 if (!strncmp(argv[i], "--sha1=", 7)) {
 704                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 705                         ctx.qry.has_sha1 = 1;
 706                 }
 707                 if (!strncmp(argv[i], "--ofs=", 6)) {
 708                         ctx.qry.ofs = atoi(argv[i]+6);
 709                 }
 710                 if (!strncmp(argv[i], "--scan-tree=", 12) ||
 711                     !strncmp(argv[i], "--scan-path=", 12)) {
 712                         /* HACK: the global snapshot bitmask defines the
 713                          * set of allowed snapshot formats, but the config
 714                          * file hasn't been parsed yet so the mask is
 715                          * currently 0. By setting all bits high before
 716                          * scanning we make sure that any in-repo cgitrc
 717                          * snapshot setting is respected by scan_tree().
 718                          * BTW: we assume that there'll never be more than
 719                          * 255 different snapshot formats supported by cgit...
 720                          */
 721                         ctx.cfg.snapshots = 0xFF;
 722                         scan++;
 723                         scan_tree(argv[i] + 12, repo_config);
 724                 }
 725         }
 726         if (scan) {
 727                 qsort(cgit_repolist.repos, cgit_repolist.count,
 728                         sizeof(struct cgit_repo), cmp_repos);
 729                 print_repolist(stdout, &cgit_repolist, 0);
 730                 exit(0);
 731         }
 732 }
 733
 734 static int calc_ttl()
 735 {
 736         if (!ctx.repo)
 737                 return ctx.cfg.cache_root_ttl;
 738
 739         if (!ctx.qry.page)
 740                 return ctx.cfg.cache_repo_ttl;
 741
 742         if (ctx.qry.has_symref)
 743                 return ctx.cfg.cache_dynamic_ttl;
 744
 745         if (ctx.qry.has_sha1)
 746                 return ctx.cfg.cache_static_ttl;
 747
 748         return ctx.cfg.cache_repo_ttl;
 749 }
 750
 751 int main(int argc, const char **argv)
 752 {
 753         const char *path;
 754         char *qry;
 755         int err, ttl;
 756
 757         prepare_context(&ctx);
 758         cgit_repolist.length = 0;
 759         cgit_repolist.count = 0;
 760         cgit_repolist.repos = NULL;
 761
 762         cgit_parse_args(argc, argv);
 763         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
 764         ctx.repo = NULL;
 765         http_parse_querystring(ctx.qry.raw, querystring_cb);
 766
 767         /* If virtual-root isn't specified in cgitrc, lets pretend
 768          * that virtual-root equals SCRIPT_NAME, minus any possibly
 769          * trailing slashes.
 770          */
 771         if (!ctx.cfg.virtual_root)
 772                 ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
 773
 774         /* If no url parameter is specified on the querystring, lets
 775          * use PATH_INFO as url. This allows cgit to work with virtual
 776          * urls without the need for rewriterules in the webserver (as
 777          * long as PATH_INFO is included in the cache lookup key).
 778          */
 779         path = ctx.env.path_info;
 780         if (!ctx.qry.url && path) {
 781                 if (path[0] == '/')
 782                         path++;
 783                 ctx.qry.url = xstrdup(path);
 784                 if (ctx.qry.raw) {
 785                         qry = ctx.qry.raw;
 786                         ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 787                         free(qry);
 788                 } else
 789                         ctx.qry.raw = xstrdup(ctx.qry.url);
 790                 cgit_parse_url(ctx.qry.url);
 791         }
 792
 793         ttl = calc_ttl();
 794         ctx.page.expires += ttl*60;
 795         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 796                 ctx.cfg.nocache = 1;
 797         if (ctx.cfg.nocache)
 798                 ctx.cfg.cache_size = 0;
 799         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 800                             ctx.qry.raw, ttl, process_request, &ctx);
 801         if (err)
 802                 cgit_print_error(fmt("Error processing page: %s (%d)",
 803                                      strerror(err), err));
 804         return err;
 805 }