cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "cache.h"
  11 #include "cmd.h"
  12 #include "configfile.h"
  13 #include "html.h"
  14 #include "ui-shared.h"
  15 #include "ui-stats.h"
  16 #include "ui-blob.h"
  17 #include "ui-summary.h"
  18 #include "scan-tree.h"
  19
  20 const char *cgit_version = CGIT_VERSION;
  21
  22 static void add_mimetype(const char *name, const char *value)
  23 {
  24         struct string_list_item *item;
  25
  26         item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
  27         item->util = xstrdup(value);
  28 }
  29
  30 static void process_cached_repolist(const char *path);
  31
  32 static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
  33 {
  34         struct string_list_item *item;
  35
  36         if (!strcmp(name, "name"))
  37                 repo->name = xstrdup(value);
  38         else if (!strcmp(name, "clone-url"))
  39                 repo->clone_url = xstrdup(value);
  40         else if (!strcmp(name, "desc"))
  41                 repo->desc = xstrdup(value);
  42         else if (!strcmp(name, "owner"))
  43                 repo->owner = xstrdup(value);
  44         else if (!strcmp(name, "defbranch"))
  45                 repo->defbranch = xstrdup(value);
  46         else if (!strcmp(name, "snapshots"))
  47                 repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
  48         else if (!strcmp(name, "enable-commit-graph"))
  49                 repo->enable_commit_graph = atoi(value);
  50         else if (!strcmp(name, "enable-log-filecount"))
  51                 repo->enable_log_filecount = atoi(value);
  52         else if (!strcmp(name, "enable-log-linecount"))
  53                 repo->enable_log_linecount = atoi(value);
  54         else if (!strcmp(name, "enable-remote-branches"))
  55                 repo->enable_remote_branches = atoi(value);
  56         else if (!strcmp(name, "enable-subject-links"))
  57                 repo->enable_subject_links = atoi(value);
  58         else if (!strcmp(name, "branch-sort")) {
  59                 if (!strcmp(value, "age"))
  60                         repo->branch_sort = 1;
  61                 if (!strcmp(value, "name"))
  62                         repo->branch_sort = 0;
  63         } else if (!strcmp(name, "commit-sort")) {
  64                 if (!strcmp(value, "date"))
  65                         repo->commit_sort = 1;
  66                 if (!strcmp(value, "topo"))
  67                         repo->commit_sort = 2;
  68         } else if (!strcmp(name, "max-stats"))
  69                 repo->max_stats = cgit_find_stats_period(value, NULL);
  70         else if (!strcmp(name, "module-link"))
  71                 repo->module_link= xstrdup(value);
  72         else if (!prefixcmp(name, "module-link.")) {
  73                 item = string_list_append(&repo->submodules, xstrdup(name + 12));
  74                 item->util = xstrdup(value);
  75         } else if (!strcmp(name, "section"))
  76                 repo->section = xstrdup(value);
  77         else if (!strcmp(name, "readme") && value != NULL) {
  78                 if (repo->readme.items == ctx.cfg.readme.items)
  79                         memset(&repo->readme, 0, sizeof(repo->readme));
  80                 string_list_append(&repo->readme, xstrdup(value));
  81         } else if (!strcmp(name, "logo") && value != NULL)
  82                 repo->logo = xstrdup(value);
  83         else if (!strcmp(name, "logo-link") && value != NULL)
  84                 repo->logo_link = xstrdup(value);
  85         else if (ctx.cfg.enable_filter_overrides) {
  86                 if (!strcmp(name, "about-filter"))
  87                         repo->about_filter = cgit_new_filter(value, ABOUT);
  88                 else if (!strcmp(name, "commit-filter"))
  89                         repo->commit_filter = cgit_new_filter(value, COMMIT);
  90                 else if (!strcmp(name, "source-filter"))
  91                         repo->source_filter = cgit_new_filter(value, SOURCE);
  92                 else if (!strcmp(name, "email-filter"))
  93                         repo->email_filter = cgit_new_filter(value, EMAIL);
  94         }
  95 }
  96
  97 static void config_cb(const char *name, const char *value)
  98 {
  99         if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
 100                 ctx.cfg.section = xstrdup(value);
 101         else if (!strcmp(name, "repo.url"))
 102                 ctx.repo = cgit_add_repo(value);
 103         else if (ctx.repo && !strcmp(name, "repo.path"))
 104                 ctx.repo->path = trim_end(value, '/');
 105         else if (ctx.repo && !prefixcmp(name, "repo."))
 106                 repo_config(ctx.repo, name + 5, value);
 107         else if (!strcmp(name, "readme") && value != NULL)
 108                 string_list_append(&ctx.cfg.readme, xstrdup(value));
 109         else if (!strcmp(name, "root-title"))
 110                 ctx.cfg.root_title = xstrdup(value);
 111         else if (!strcmp(name, "root-desc"))
 112                 ctx.cfg.root_desc = xstrdup(value);
 113         else if (!strcmp(name, "root-readme"))
 114                 ctx.cfg.root_readme = xstrdup(value);
 115         else if (!strcmp(name, "css"))
 116                 ctx.cfg.css = xstrdup(value);
 117         else if (!strcmp(name, "favicon"))
 118                 ctx.cfg.favicon = xstrdup(value);
 119         else if (!strcmp(name, "footer"))
 120                 ctx.cfg.footer = xstrdup(value);
 121         else if (!strcmp(name, "head-include"))
 122                 ctx.cfg.head_include = xstrdup(value);
 123         else if (!strcmp(name, "header"))
 124                 ctx.cfg.header = xstrdup(value);
 125         else if (!strcmp(name, "logo"))
 126                 ctx.cfg.logo = xstrdup(value);
 127         else if (!strcmp(name, "index-header"))
 128                 ctx.cfg.index_header = xstrdup(value);
 129         else if (!strcmp(name, "index-info"))
 130                 ctx.cfg.index_info = xstrdup(value);
 131         else if (!strcmp(name, "logo-link"))
 132                 ctx.cfg.logo_link = xstrdup(value);
 133         else if (!strcmp(name, "module-link"))
 134                 ctx.cfg.module_link = xstrdup(value);
 135         else if (!strcmp(name, "strict-export"))
 136                 ctx.cfg.strict_export = xstrdup(value);
 137         else if (!strcmp(name, "virtual-root")) {
 138                 ctx.cfg.virtual_root = ensure_end(value, '/');
 139         } else if (!strcmp(name, "nocache"))
 140                 ctx.cfg.nocache = atoi(value);
 141         else if (!strcmp(name, "noplainemail"))
 142                 ctx.cfg.noplainemail = atoi(value);
 143         else if (!strcmp(name, "noheader"))
 144                 ctx.cfg.noheader = atoi(value);
 145         else if (!strcmp(name, "snapshots"))
 146                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
 147         else if (!strcmp(name, "enable-filter-overrides"))
 148                 ctx.cfg.enable_filter_overrides = atoi(value);
 149         else if (!strcmp(name, "enable-http-clone"))
 150                 ctx.cfg.enable_http_clone = atoi(value);
 151         else if (!strcmp(name, "enable-index-links"))
 152                 ctx.cfg.enable_index_links = atoi(value);
 153         else if (!strcmp(name, "enable-index-owner"))
 154                 ctx.cfg.enable_index_owner = atoi(value);
 155         else if (!strcmp(name, "enable-commit-graph"))
 156                 ctx.cfg.enable_commit_graph = atoi(value);
 157         else if (!strcmp(name, "enable-log-filecount"))
 158                 ctx.cfg.enable_log_filecount = atoi(value);
 159         else if (!strcmp(name, "enable-log-linecount"))
 160                 ctx.cfg.enable_log_linecount = atoi(value);
 161         else if (!strcmp(name, "enable-remote-branches"))
 162                 ctx.cfg.enable_remote_branches = atoi(value);
 163         else if (!strcmp(name, "enable-subject-links"))
 164                 ctx.cfg.enable_subject_links = atoi(value);
 165         else if (!strcmp(name, "enable-tree-linenumbers"))
 166                 ctx.cfg.enable_tree_linenumbers = atoi(value);
 167         else if (!strcmp(name, "enable-git-config"))
 168                 ctx.cfg.enable_git_config = atoi(value);
 169         else if (!strcmp(name, "max-stats"))
 170                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
 171         else if (!strcmp(name, "cache-size"))
 172                 ctx.cfg.cache_size = atoi(value);
 173         else if (!strcmp(name, "cache-root"))
 174                 ctx.cfg.cache_root = xstrdup(expand_macros(value));
 175         else if (!strcmp(name, "cache-root-ttl"))
 176                 ctx.cfg.cache_root_ttl = atoi(value);
 177         else if (!strcmp(name, "cache-repo-ttl"))
 178                 ctx.cfg.cache_repo_ttl = atoi(value);
 179         else if (!strcmp(name, "cache-scanrc-ttl"))
 180                 ctx.cfg.cache_scanrc_ttl = atoi(value);
 181         else if (!strcmp(name, "cache-static-ttl"))
 182                 ctx.cfg.cache_static_ttl = atoi(value);
 183         else if (!strcmp(name, "cache-dynamic-ttl"))
 184                 ctx.cfg.cache_dynamic_ttl = atoi(value);
 185         else if (!strcmp(name, "cache-about-ttl"))
 186                 ctx.cfg.cache_about_ttl = atoi(value);
 187         else if (!strcmp(name, "case-sensitive-sort"))
 188                 ctx.cfg.case_sensitive_sort = atoi(value);
 189         else if (!strcmp(name, "about-filter"))
 190                 ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
 191         else if (!strcmp(name, "commit-filter"))
 192                 ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
 193         else if (!strcmp(name, "email-filter"))
 194                 ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
 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, "repository-sort"))
 224                 ctx.cfg.repository_sort = xstrdup(value);
 225         else if (!strcmp(name, "section-sort"))
 226                 ctx.cfg.section_sort = atoi(value);
 227         else if (!strcmp(name, "source-filter"))
 228                 ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
 229         else if (!strcmp(name, "summary-log"))
 230                 ctx.cfg.summary_log = atoi(value);
 231         else if (!strcmp(name, "summary-branches"))
 232                 ctx.cfg.summary_branches = atoi(value);
 233         else if (!strcmp(name, "summary-tags"))
 234                 ctx.cfg.summary_tags = atoi(value);
 235         else if (!strcmp(name, "side-by-side-diffs"))
 236                 ctx.cfg.ssdiff = atoi(value);
 237         else if (!strcmp(name, "agefile"))
 238                 ctx.cfg.agefile = xstrdup(value);
 239         else if (!strcmp(name, "mimetype-file"))
 240                 ctx.cfg.mimetype_file = xstrdup(value);
 241         else if (!strcmp(name, "renamelimit"))
 242                 ctx.cfg.renamelimit = atoi(value);
 243         else if (!strcmp(name, "remove-suffix"))
 244                 ctx.cfg.remove_suffix = atoi(value);
 245         else if (!strcmp(name, "robots"))
 246                 ctx.cfg.robots = xstrdup(value);
 247         else if (!strcmp(name, "clone-prefix"))
 248                 ctx.cfg.clone_prefix = xstrdup(value);
 249         else if (!strcmp(name, "clone-url"))
 250                 ctx.cfg.clone_url = xstrdup(value);
 251         else if (!strcmp(name, "local-time"))
 252                 ctx.cfg.local_time = atoi(value);
 253         else if (!strcmp(name, "commit-sort")) {
 254                 if (!strcmp(value, "date"))
 255                         ctx.cfg.commit_sort = 1;
 256                 if (!strcmp(value, "topo"))
 257                         ctx.cfg.commit_sort = 2;
 258         } else if (!strcmp(name, "branch-sort")) {
 259                 if (!strcmp(value, "age"))
 260                         ctx.cfg.branch_sort = 1;
 261                 if (!strcmp(value, "name"))
 262                         ctx.cfg.branch_sort = 0;
 263         } else if (!prefixcmp(name, "mimetype."))
 264                 add_mimetype(name + 9, value);
 265         else if (!strcmp(name, "include"))
 266                 parse_configfile(expand_macros(value), config_cb);
 267 }
 268
 269 static void querystring_cb(const char *name, const char *value)
 270 {
 271         if (!value)
 272                 value = "";
 273
 274         if (!strcmp(name,"r")) {
 275                 ctx.qry.repo = xstrdup(value);
 276                 ctx.repo = cgit_get_repoinfo(value);
 277         } else if (!strcmp(name, "p")) {
 278                 ctx.qry.page = xstrdup(value);
 279         } else if (!strcmp(name, "url")) {
 280                 if (*value == '/')
 281                         value++;
 282                 ctx.qry.url = xstrdup(value);
 283                 cgit_parse_url(value);
 284         } else if (!strcmp(name, "qt")) {
 285                 ctx.qry.grep = xstrdup(value);
 286         } else if (!strcmp(name, "q")) {
 287                 ctx.qry.search = xstrdup(value);
 288         } else if (!strcmp(name, "h")) {
 289                 ctx.qry.head = xstrdup(value);
 290                 ctx.qry.has_symref = 1;
 291         } else if (!strcmp(name, "id")) {
 292                 ctx.qry.sha1 = xstrdup(value);
 293                 ctx.qry.has_sha1 = 1;
 294         } else if (!strcmp(name, "id2")) {
 295                 ctx.qry.sha2 = xstrdup(value);
 296                 ctx.qry.has_sha1 = 1;
 297         } else if (!strcmp(name, "ofs")) {
 298                 ctx.qry.ofs = atoi(value);
 299         } else if (!strcmp(name, "path")) {
 300                 ctx.qry.path = trim_end(value, '/');
 301         } else if (!strcmp(name, "name")) {
 302                 ctx.qry.name = xstrdup(value);
 303         } else if (!strcmp(name, "mimetype")) {
 304                 ctx.qry.mimetype = xstrdup(value);
 305         } else if (!strcmp(name, "s")) {
 306                 ctx.qry.sort = xstrdup(value);
 307         } else if (!strcmp(name, "showmsg")) {
 308                 ctx.qry.showmsg = atoi(value);
 309         } else if (!strcmp(name, "period")) {
 310                 ctx.qry.period = xstrdup(value);
 311         } else if (!strcmp(name, "ss")) {
 312                 ctx.qry.ssdiff = atoi(value);
 313                 ctx.qry.has_ssdiff = 1;
 314         } else if (!strcmp(name, "all")) {
 315                 ctx.qry.show_all = atoi(value);
 316         } else if (!strcmp(name, "context")) {
 317                 ctx.qry.context = atoi(value);
 318         } else if (!strcmp(name, "ignorews")) {
 319                 ctx.qry.ignorews = atoi(value);
 320         }
 321 }
 322
 323 static void prepare_context(struct cgit_context *ctx)
 324 {
 325         memset(ctx, 0, sizeof(*ctx));
 326         ctx->cfg.agefile = "info/web/last-modified";
 327         ctx->cfg.nocache = 0;
 328         ctx->cfg.cache_size = 0;
 329         ctx->cfg.cache_max_create_time = 5;
 330         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 331         ctx->cfg.cache_about_ttl = 15;
 332         ctx->cfg.cache_repo_ttl = 5;
 333         ctx->cfg.cache_root_ttl = 5;
 334         ctx->cfg.cache_scanrc_ttl = 15;
 335         ctx->cfg.cache_dynamic_ttl = 5;
 336         ctx->cfg.cache_static_ttl = -1;
 337         ctx->cfg.case_sensitive_sort = 1;
 338         ctx->cfg.branch_sort = 0;
 339         ctx->cfg.commit_sort = 0;
 340         ctx->cfg.css = "/cgit.css";
 341         ctx->cfg.logo = "/cgit.png";
 342         ctx->cfg.favicon = "/favicon.ico";
 343         ctx->cfg.local_time = 0;
 344         ctx->cfg.enable_http_clone = 1;
 345         ctx->cfg.enable_index_owner = 1;
 346         ctx->cfg.enable_tree_linenumbers = 1;
 347         ctx->cfg.enable_git_config = 0;
 348         ctx->cfg.max_repo_count = 50;
 349         ctx->cfg.max_commit_count = 50;
 350         ctx->cfg.max_lock_attempts = 5;
 351         ctx->cfg.max_msg_len = 80;
 352         ctx->cfg.max_repodesc_len = 80;
 353         ctx->cfg.max_blob_size = 0;
 354         ctx->cfg.max_stats = 0;
 355         ctx->cfg.project_list = NULL;
 356         ctx->cfg.renamelimit = -1;
 357         ctx->cfg.remove_suffix = 0;
 358         ctx->cfg.robots = "index, nofollow";
 359         ctx->cfg.root_title = "Git repository browser";
 360         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 361         ctx->cfg.scan_hidden_path = 0;
 362         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 363         ctx->cfg.section = "";
 364         ctx->cfg.repository_sort = "name";
 365         ctx->cfg.section_sort = 1;
 366         ctx->cfg.summary_branches = 10;
 367         ctx->cfg.summary_log = 10;
 368         ctx->cfg.summary_tags = 10;
 369         ctx->cfg.max_atom_items = 10;
 370         ctx->cfg.ssdiff = 0;
 371         ctx->env.cgit_config = getenv("CGIT_CONFIG");
 372         ctx->env.http_host = getenv("HTTP_HOST");
 373         ctx->env.https = getenv("HTTPS");
 374         ctx->env.no_http = getenv("NO_HTTP");
 375         ctx->env.path_info = getenv("PATH_INFO");
 376         ctx->env.query_string = getenv("QUERY_STRING");
 377         ctx->env.request_method = getenv("REQUEST_METHOD");
 378         ctx->env.script_name = getenv("SCRIPT_NAME");
 379         ctx->env.server_name = getenv("SERVER_NAME");
 380         ctx->env.server_port = getenv("SERVER_PORT");
 381         ctx->page.mimetype = "text/html";
 382         ctx->page.charset = PAGE_ENCODING;
 383         ctx->page.filename = NULL;
 384         ctx->page.size = 0;
 385         ctx->page.modified = time(NULL);
 386         ctx->page.expires = ctx->page.modified;
 387         ctx->page.etag = NULL;
 388         memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
 389         if (ctx->env.script_name)
 390                 ctx->cfg.script_name = xstrdup(ctx->env.script_name);
 391         if (ctx->env.query_string)
 392                 ctx->qry.raw = xstrdup(ctx->env.query_string);
 393         if (!ctx->env.cgit_config)
 394                 ctx->env.cgit_config = CGIT_CONFIG;
 395 }
 396
 397 struct refmatch {
 398         char *req_ref;
 399         char *first_ref;
 400         int match;
 401 };
 402
 403 static int find_current_ref(const char *refname, const unsigned char *sha1,
 404                             int flags, void *cb_data)
 405 {
 406         struct refmatch *info;
 407
 408         info = (struct refmatch *)cb_data;
 409         if (!strcmp(refname, info->req_ref))
 410                 info->match = 1;
 411         if (!info->first_ref)
 412                 info->first_ref = xstrdup(refname);
 413         return info->match;
 414 }
 415
 416 static void free_refmatch_inner(struct refmatch *info)
 417 {
 418         if (info->first_ref)
 419                 free(info->first_ref);
 420 }
 421
 422 static char *find_default_branch(struct cgit_repo *repo)
 423 {
 424         struct refmatch info;
 425         char *ref;
 426
 427         info.req_ref = repo->defbranch;
 428         info.first_ref = NULL;
 429         info.match = 0;
 430         for_each_branch_ref(find_current_ref, &info);
 431         if (info.match)
 432                 ref = info.req_ref;
 433         else
 434                 ref = info.first_ref;
 435         if (ref)
 436                 ref = xstrdup(ref);
 437         free_refmatch_inner(&info);
 438
 439         return ref;
 440 }
 441
 442 static char *guess_defbranch(void)
 443 {
 444         const char *ref;
 445         unsigned char sha1[20];
 446
 447         ref = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
 448         if (!ref || prefixcmp(ref, "refs/heads/"))
 449                 return "master";
 450         return xstrdup(ref + 11);
 451 }
 452 /* The caller must free filename and ref after calling this. */
 453 static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 454 {
 455         const char *colon;
 456
 457         *filename = NULL;
 458         *ref = NULL;
 459
 460         if (!readme || !readme[0])
 461                 return;
 462
 463         /* Check if the readme is tracked in the git repo. */
 464         colon = strchr(readme, ':');
 465         if (colon && strlen(colon) > 1) {
 466                 /* If it starts with a colon, we want to use
 467                  * the default branch */
 468                 if (colon == readme && repo->defbranch)
 469                         *ref = xstrdup(repo->defbranch);
 470                 else
 471                         *ref = xstrndup(readme, colon - readme);
 472                 readme = colon + 1;
 473         }
 474
 475         /* Prepend repo path to relative readme path unless tracked. */
 476         if (!(*ref) && readme[0] != '/')
 477                 *filename = fmtalloc("%s/%s", repo->path, readme);
 478         else
 479                 *filename = xstrdup(readme);
 480 }
 481 static void choose_readme(struct cgit_repo *repo)
 482 {
 483         int found;
 484         char *filename, *ref;
 485         struct string_list_item *entry;
 486
 487         if (!repo->readme.nr)
 488                 return;
 489
 490         found = 0;
 491         for_each_string_list_item(entry, &repo->readme) {
 492                 parse_readme(entry->string, &filename, &ref, repo);
 493                 if (!filename) {
 494                         free(filename);
 495                         free(ref);
 496                         continue;
 497                 }
 498                 /* If there's only one item, we skip the possibly expensive
 499                  * selection process. */
 500                 if (repo->readme.nr == 1) {
 501                         found = 1;
 502                         break;
 503                 }
 504                 if (ref) {
 505                         if (cgit_ref_path_exists(filename, ref, 1)) {
 506                                 found = 1;
 507                                 break;
 508                         }
 509                 }
 510                 else if (!access(filename, R_OK)) {
 511                         found = 1;
 512                         break;
 513                 }
 514                 free(filename);
 515                 free(ref);
 516         }
 517         repo->readme.strdup_strings = 1;
 518         string_list_clear(&repo->readme, 0);
 519         repo->readme.strdup_strings = 0;
 520         if (found)
 521                 string_list_append(&repo->readme, filename)->util = ref;
 522 }
 523
 524 static int prepare_repo_cmd(struct cgit_context *ctx)
 525 {
 526         unsigned char sha1[20];
 527         int nongit = 0;
 528         int rc;
 529
 530         /* The path to the git repository. */
 531         setenv("GIT_DIR", ctx->repo->path, 1);
 532
 533         /* Do not look in /etc/ for gitconfig and gitattributes. */
 534         setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
 535         setenv("GIT_ATTR_NOSYSTEM", "1", 1);
 536         unsetenv("HOME");
 537         unsetenv("XDG_CONFIG_HOME");
 538
 539         /* Setup the git directory and initialize the notes system. Both of these
 540          * load local configuration from the git repository, so we do them both while
 541          * the HOME variables are unset. */
 542         setup_git_directory_gently(&nongit);
 543         init_display_notes(NULL);
 544
 545         if (nongit) {
 546                 const char *name = ctx->repo->name;
 547                 rc = errno;
 548                 ctx->page.title = fmtalloc("%s - %s", ctx->cfg.root_title,
 549                                                 "config error");
 550                 ctx->repo = NULL;
 551                 cgit_print_http_headers(ctx);
 552                 cgit_print_docstart(ctx);
 553                 cgit_print_pageheader(ctx);
 554                 cgit_print_error("Failed to open %s: %s", name,
 555                                  rc ? strerror(rc) : "Not a valid git repository");
 556                 cgit_print_docend();
 557                 return 1;
 558         }
 559         ctx->page.title = fmtalloc("%s - %s", ctx->repo->name, ctx->repo->desc);
 560
 561         if (!ctx->repo->defbranch)
 562                 ctx->repo->defbranch = guess_defbranch();
 563
 564         if (!ctx->qry.head) {
 565                 ctx->qry.nohead = 1;
 566                 ctx->qry.head = find_default_branch(ctx->repo);
 567         }
 568
 569         if (!ctx->qry.head) {
 570                 cgit_print_http_headers(ctx);
 571                 cgit_print_docstart(ctx);
 572                 cgit_print_pageheader(ctx);
 573                 cgit_print_error("Repository seems to be empty");
 574                 cgit_print_docend();
 575                 return 1;
 576         }
 577
 578         if (get_sha1(ctx->qry.head, sha1)) {
 579                 char *tmp = xstrdup(ctx->qry.head);
 580                 ctx->qry.head = ctx->repo->defbranch;
 581                 ctx->page.status = 404;
 582                 ctx->page.statusmsg = "Not found";
 583                 cgit_print_http_headers(ctx);
 584                 cgit_print_docstart(ctx);
 585                 cgit_print_pageheader(ctx);
 586                 cgit_print_error("Invalid branch: %s", tmp);
 587                 cgit_print_docend();
 588                 return 1;
 589         }
 590         sort_string_list(&ctx->repo->submodules);
 591         cgit_prepare_repo_env(ctx->repo);
 592         choose_readme(ctx->repo);
 593         return 0;
 594 }
 595
 596 static void process_request(void *cbdata)
 597 {
 598         struct cgit_context *ctx = cbdata;
 599         struct cgit_cmd *cmd;
 600
 601         cmd = cgit_get_cmd(ctx);
 602         if (!cmd) {
 603                 ctx->page.title = "cgit error";
 604                 ctx->page.status = 404;
 605                 ctx->page.statusmsg = "Not found";
 606                 cgit_print_http_headers(ctx);
 607                 cgit_print_docstart(ctx);
 608                 cgit_print_pageheader(ctx);
 609                 cgit_print_error("Invalid request");
 610                 cgit_print_docend();
 611                 return;
 612         }
 613
 614         if (!ctx->cfg.enable_http_clone && cmd->is_clone) {
 615                 html_status(404, "Not found", 0);
 616                 return;
 617         }
 618
 619         /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
 620          * in-project path limit to be made available at ctx->qry.vpath.
 621          * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
 622          */
 623         ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
 624
 625         if (cmd->want_repo && !ctx->repo) {
 626                 cgit_print_http_headers(ctx);
 627                 cgit_print_docstart(ctx);
 628                 cgit_print_pageheader(ctx);
 629                 cgit_print_error("No repository selected");
 630                 cgit_print_docend();
 631                 return;
 632         }
 633
 634         if (ctx->repo && prepare_repo_cmd(ctx))
 635                 return;
 636
 637         if (cmd->want_layout) {
 638                 cgit_print_http_headers(ctx);
 639                 cgit_print_docstart(ctx);
 640                 cgit_print_pageheader(ctx);
 641         }
 642
 643         cmd->fn(ctx);
 644
 645         if (cmd->want_layout)
 646                 cgit_print_docend();
 647 }
 648
 649 static int cmp_repos(const void *a, const void *b)
 650 {
 651         const struct cgit_repo *ra = a, *rb = b;
 652         return strcmp(ra->url, rb->url);
 653 }
 654
 655 static char *build_snapshot_setting(int bitmap)
 656 {
 657         const struct cgit_snapshot_format *f;
 658         struct strbuf result = STRBUF_INIT;
 659
 660         for (f = cgit_snapshot_formats; f->suffix; f++) {
 661                 if (f->bit & bitmap) {
 662                         if (result.len)
 663                                 strbuf_addch(&result, ' ');
 664                         strbuf_addstr(&result, f->suffix);
 665                 }
 666         }
 667         return strbuf_detach(&result, NULL);
 668 }
 669
 670 static char *get_first_line(char *txt)
 671 {
 672         char *t = xstrdup(txt);
 673         char *p = strchr(t, '\n');
 674         if (p)
 675                 *p = '\0';
 676         return t;
 677 }
 678
 679 static void print_repo(FILE *f, struct cgit_repo *repo)
 680 {
 681         struct string_list_item *item;
 682         fprintf(f, "repo.url=%s\n", repo->url);
 683         fprintf(f, "repo.name=%s\n", repo->name);
 684         fprintf(f, "repo.path=%s\n", repo->path);
 685         if (repo->owner)
 686                 fprintf(f, "repo.owner=%s\n", repo->owner);
 687         if (repo->desc) {
 688                 char *tmp = get_first_line(repo->desc);
 689                 fprintf(f, "repo.desc=%s\n", tmp);
 690                 free(tmp);
 691         }
 692         for_each_string_list_item(item, &repo->readme) {
 693                 if (item->util)
 694                         fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
 695                 else
 696                         fprintf(f, "repo.readme=%s\n", item->string);
 697         }
 698         if (repo->defbranch)
 699                 fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
 700         if (repo->module_link)
 701                 fprintf(f, "repo.module-link=%s\n", repo->module_link);
 702         if (repo->section)
 703                 fprintf(f, "repo.section=%s\n", repo->section);
 704         if (repo->clone_url)
 705                 fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
 706         fprintf(f, "repo.enable-commit-graph=%d\n",
 707                 repo->enable_commit_graph);
 708         fprintf(f, "repo.enable-log-filecount=%d\n",
 709                 repo->enable_log_filecount);
 710         fprintf(f, "repo.enable-log-linecount=%d\n",
 711                 repo->enable_log_linecount);
 712         if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
 713                 cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
 714         if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
 715                 cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
 716         if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
 717                 cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
 718         if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
 719                 cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
 720         if (repo->snapshots != ctx.cfg.snapshots) {
 721                 char *tmp = build_snapshot_setting(repo->snapshots);
 722                 fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
 723                 free(tmp);
 724         }
 725         if (repo->max_stats != ctx.cfg.max_stats)
 726                 fprintf(f, "repo.max-stats=%s\n",
 727                         cgit_find_stats_periodname(repo->max_stats));
 728         if (repo->logo)
 729                 fprintf(f, "repo.logo=%s\n", repo->logo);
 730         if (repo->logo_link)
 731                 fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
 732         fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
 733         fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
 734         if (repo->branch_sort == 1)
 735                 fprintf(f, "repo.branch-sort=age\n");
 736         if (repo->commit_sort) {
 737                 if (repo->commit_sort == 1)
 738                         fprintf(f, "repo.commit-sort=date\n");
 739                 else if (repo->commit_sort == 2)
 740                         fprintf(f, "repo.commit-sort=topo\n");
 741         }
 742         fprintf(f, "\n");
 743 }
 744
 745 static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 746 {
 747         int i;
 748
 749         for (i = start; i < list->count; i++)
 750                 print_repo(f, &list->repos[i]);
 751 }
 752
 753 /* Scan 'path' for git repositories, save the resulting repolist in 'cached_rc'
 754  * and return 0 on success.
 755  */
 756 static int generate_cached_repolist(const char *path, const char *cached_rc)
 757 {
 758         struct strbuf locked_rc = STRBUF_INIT;
 759         int result = 0;
 760         int idx;
 761         FILE *f;
 762
 763         strbuf_addf(&locked_rc, "%s.lock", cached_rc);
 764         f = fopen(locked_rc.buf, "wx");
 765         if (!f) {
 766                 /* Inform about the error unless the lockfile already existed,
 767                  * since that only means we've got concurrent requests.
 768                  */
 769                 result = errno;
 770                 if (result != EEXIST)
 771                         fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
 772                                 locked_rc.buf, strerror(result), result);
 773                 goto out;
 774         }
 775         idx = cgit_repolist.count;
 776         if (ctx.cfg.project_list)
 777                 scan_projects(path, ctx.cfg.project_list, repo_config);
 778         else
 779                 scan_tree(path, repo_config);
 780         print_repolist(f, &cgit_repolist, idx);
 781         if (rename(locked_rc.buf, cached_rc))
 782                 fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
 783                         locked_rc.buf, cached_rc, strerror(errno), errno);
 784         fclose(f);
 785 out:
 786         strbuf_release(&locked_rc);
 787         return result;
 788 }
 789
 790 static void process_cached_repolist(const char *path)
 791 {
 792         struct stat st;
 793         struct strbuf cached_rc = STRBUF_INIT;
 794         time_t age;
 795         unsigned long hash;
 796
 797         hash = hash_str(path);
 798         if (ctx.cfg.project_list)
 799                 hash += hash_str(ctx.cfg.project_list);
 800         strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 801
 802         if (stat(cached_rc.buf, &st)) {
 803                 /* Nothing is cached, we need to scan without forking. And
 804                  * if we fail to generate a cached repolist, we need to
 805                  * invoke scan_tree manually.
 806                  */
 807                 if (generate_cached_repolist(path, cached_rc.buf)) {
 808                         if (ctx.cfg.project_list)
 809                                 scan_projects(path, ctx.cfg.project_list,
 810                                               repo_config);
 811                         else
 812                                 scan_tree(path, repo_config);
 813                 }
 814                 goto out;
 815         }
 816
 817         parse_configfile(cached_rc.buf, config_cb);
 818
 819         /* If the cached configfile hasn't expired, lets exit now */
 820         age = time(NULL) - st.st_mtime;
 821         if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 822                 goto out;
 823
 824         /* The cached repolist has been parsed, but it was old. So lets
 825          * rescan the specified path and generate a new cached repolist
 826          * in a child-process to avoid latency for the current request.
 827          */
 828         if (fork())
 829                 goto out;
 830
 831         exit(generate_cached_repolist(path, cached_rc.buf));
 832 out:
 833         strbuf_release(&cached_rc);
 834 }
 835
 836 static void cgit_parse_args(int argc, const char **argv)
 837 {
 838         int i;
 839         int scan = 0;
 840
 841         for (i = 1; i < argc; i++) {
 842                 if (!prefixcmp(argv[i], "--cache=")) {
 843                         ctx.cfg.cache_root = xstrdup(argv[i] + 8);
 844                 } else if (!strcmp(argv[i], "--nocache")) {
 845                         ctx.cfg.nocache = 1;
 846                 } else if (!strcmp(argv[i], "--nohttp")) {
 847                         ctx.env.no_http = "1";
 848                 } else if (!prefixcmp(argv[i], "--query=")) {
 849                         ctx.qry.raw = xstrdup(argv[i] + 8);
 850                 } else if (!prefixcmp(argv[i], "--repo=")) {
 851                         ctx.qry.repo = xstrdup(argv[i] + 7);
 852                 } else if (!prefixcmp(argv[i], "--page=")) {
 853                         ctx.qry.page = xstrdup(argv[i] + 7);
 854                 } else if (!prefixcmp(argv[i], "--head=")) {
 855                         ctx.qry.head = xstrdup(argv[i] + 7);
 856                         ctx.qry.has_symref = 1;
 857                 } else if (!prefixcmp(argv[i], "--sha1=")) {
 858                         ctx.qry.sha1 = xstrdup(argv[i] + 7);
 859                         ctx.qry.has_sha1 = 1;
 860                 } else if (!prefixcmp(argv[i], "--ofs=")) {
 861                         ctx.qry.ofs = atoi(argv[i] + 6);
 862                 } else if (!prefixcmp(argv[i], "--scan-tree=") ||
 863                            !prefixcmp(argv[i], "--scan-path=")) {
 864                         /*
 865                          * HACK: The global snapshot bit mask defines the set
 866                          * of allowed snapshot formats, but the config file
 867                          * hasn't been parsed yet so the mask is currently 0.
 868                          * By setting all bits high before scanning we make
 869                          * sure that any in-repo cgitrc snapshot setting is
 870                          * respected by scan_tree().
 871                          *
 872                          * NOTE: We assume that there aren't more than 8
 873                          * different snapshot formats supported by cgit...
 874                          */
 875                         ctx.cfg.snapshots = 0xFF;
 876                         scan++;
 877                         scan_tree(argv[i] + 12, repo_config);
 878                 }
 879         }
 880         if (scan) {
 881                 qsort(cgit_repolist.repos, cgit_repolist.count,
 882                         sizeof(struct cgit_repo), cmp_repos);
 883                 print_repolist(stdout, &cgit_repolist, 0);
 884                 exit(0);
 885         }
 886 }
 887
 888 static int calc_ttl()
 889 {
 890         if (!ctx.repo)
 891                 return ctx.cfg.cache_root_ttl;
 892
 893         if (!ctx.qry.page)
 894                 return ctx.cfg.cache_repo_ttl;
 895
 896         if (!strcmp(ctx.qry.page, "about"))
 897                 return ctx.cfg.cache_about_ttl;
 898
 899         if (ctx.qry.has_sha1)
 900                 return ctx.cfg.cache_static_ttl;
 901
 902         if (ctx.qry.has_symref)
 903                 return ctx.cfg.cache_dynamic_ttl;
 904
 905         return ctx.cfg.cache_repo_ttl;
 906 }
 907
 908 int main(int argc, const char **argv)
 909 {
 910         const char *path;
 911         int err, ttl;
 912
 913         cgit_init_filters();
 914
 915         prepare_context(&ctx);
 916         cgit_repolist.length = 0;
 917         cgit_repolist.count = 0;
 918         cgit_repolist.repos = NULL;
 919
 920         cgit_parse_args(argc, argv);
 921         parse_configfile(expand_macros(ctx.env.cgit_config), config_cb);
 922         ctx.repo = NULL;
 923         http_parse_querystring(ctx.qry.raw, querystring_cb);
 924
 925         /* If virtual-root isn't specified in cgitrc, lets pretend
 926          * that virtual-root equals SCRIPT_NAME, minus any possibly
 927          * trailing slashes.
 928          */
 929         if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
 930                 ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
 931
 932         /* If no url parameter is specified on the querystring, lets
 933          * use PATH_INFO as url. This allows cgit to work with virtual
 934          * urls without the need for rewriterules in the webserver (as
 935          * long as PATH_INFO is included in the cache lookup key).
 936          */
 937         path = ctx.env.path_info;
 938         if (!ctx.qry.url && path) {
 939                 if (path[0] == '/')
 940                         path++;
 941                 ctx.qry.url = xstrdup(path);
 942                 if (ctx.qry.raw) {
 943                         char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
 944                         free(ctx.qry.raw);
 945                         ctx.qry.raw = newqry;
 946                 } else
 947                         ctx.qry.raw = xstrdup(ctx.qry.url);
 948                 cgit_parse_url(ctx.qry.url);
 949         }
 950
 951         ttl = calc_ttl();
 952         if (ttl < 0)
 953                 ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
 954         else
 955                 ctx.page.expires += ttl * 60;
 956         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 957                 ctx.cfg.nocache = 1;
 958         if (ctx.cfg.nocache)
 959                 ctx.cfg.cache_size = 0;
 960         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 961                             ctx.qry.raw, ttl, process_request, &ctx);
 962         cgit_cleanup_filters();
 963         if (err)
 964                 cgit_print_error("Error processing page: %s (%d)",
 965                                  strerror(err), err);
 966         return err;
 967 }