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