cgit.c

   1 /* cgit.c: cgi for the git scm
   2  *
   3  * Copyright (C) 2006 Lars Hjemli
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "cache.h"
  11 #include "cmd.h"
  12 #include "configfile.h"
  13 #include "html.h"
  14 #include "ui-shared.h"
  15 #include "ui-stats.h"
  16 #include "scan-tree.h"
  17
  18 const char *cgit_version = CGIT_VERSION;
  19
  20 void config_cb(const char *name, const char *value)
  21 {
  22         if (!strcmp(name, "root-title"))
  23                 ctx.cfg.root_title = xstrdup(value);
  24         else if (!strcmp(name, "root-desc"))
  25                 ctx.cfg.root_desc = xstrdup(value);
  26         else if (!strcmp(name, "root-readme"))
  27                 ctx.cfg.root_readme = xstrdup(value);
  28         else if (!strcmp(name, "css"))
  29                 ctx.cfg.css = xstrdup(value);
  30         else if (!strcmp(name, "favicon"))
  31                 ctx.cfg.favicon = xstrdup(value);
  32         else if (!strcmp(name, "footer"))
  33                 ctx.cfg.footer = xstrdup(value);
  34         else if (!strcmp(name, "logo"))
  35                 ctx.cfg.logo = xstrdup(value);
  36         else if (!strcmp(name, "index-header"))
  37                 ctx.cfg.index_header = xstrdup(value);
  38         else if (!strcmp(name, "index-info"))
  39                 ctx.cfg.index_info = xstrdup(value);
  40         else if (!strcmp(name, "logo-link"))
  41                 ctx.cfg.logo_link = xstrdup(value);
  42         else if (!strcmp(name, "module-link"))
  43                 ctx.cfg.module_link = xstrdup(value);
  44         else if (!strcmp(name, "virtual-root")) {
  45                 ctx.cfg.virtual_root = trim_end(value, '/');
  46                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
  47                         ctx.cfg.virtual_root = "";
  48         } else if (!strcmp(name, "nocache"))
  49                 ctx.cfg.nocache = atoi(value);
  50         else if (!strcmp(name, "snapshots"))
  51                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
  52         else if (!strcmp(name, "enable-index-links"))
  53                 ctx.cfg.enable_index_links = atoi(value);
  54         else if (!strcmp(name, "enable-log-filecount"))
  55                 ctx.cfg.enable_log_filecount = atoi(value);
  56         else if (!strcmp(name, "enable-log-linecount"))
  57                 ctx.cfg.enable_log_linecount = atoi(value);
  58         else if (!strcmp(name, "max-stats"))
  59                 ctx.cfg.max_stats = cgit_find_stats_period(value, NULL);
  60         else if (!strcmp(name, "cache-size"))
  61                 ctx.cfg.cache_size = atoi(value);
  62         else if (!strcmp(name, "cache-root"))
  63                 ctx.cfg.cache_root = xstrdup(value);
  64         else if (!strcmp(name, "cache-root-ttl"))
  65                 ctx.cfg.cache_root_ttl = atoi(value);
  66         else if (!strcmp(name, "cache-repo-ttl"))
  67                 ctx.cfg.cache_repo_ttl = atoi(value);
  68         else if (!strcmp(name, "cache-static-ttl"))
  69                 ctx.cfg.cache_static_ttl = atoi(value);
  70         else if (!strcmp(name, "cache-dynamic-ttl"))
  71                 ctx.cfg.cache_dynamic_ttl = atoi(value);
  72         else if (!strcmp(name, "max-message-length"))
  73                 ctx.cfg.max_msg_len = atoi(value);
  74         else if (!strcmp(name, "max-repodesc-length"))
  75                 ctx.cfg.max_repodesc_len = atoi(value);
  76         else if (!strcmp(name, "max-repo-count"))
  77                 ctx.cfg.max_repo_count = atoi(value);
  78         else if (!strcmp(name, "max-commit-count"))
  79                 ctx.cfg.max_commit_count = atoi(value);
  80         else if (!strcmp(name, "summary-log"))
  81                 ctx.cfg.summary_log = atoi(value);
  82         else if (!strcmp(name, "summary-branches"))
  83                 ctx.cfg.summary_branches = atoi(value);
  84         else if (!strcmp(name, "summary-tags"))
  85                 ctx.cfg.summary_tags = atoi(value);
  86         else if (!strcmp(name, "agefile"))
  87                 ctx.cfg.agefile = xstrdup(value);
  88         else if (!strcmp(name, "renamelimit"))
  89                 ctx.cfg.renamelimit = atoi(value);
  90         else if (!strcmp(name, "robots"))
  91                 ctx.cfg.robots = xstrdup(value);
  92         else if (!strcmp(name, "clone-prefix"))
  93                 ctx.cfg.clone_prefix = xstrdup(value);
  94         else if (!strcmp(name, "local-time"))
  95                 ctx.cfg.local_time = atoi(value);
  96         else if (!strcmp(name, "repo.group"))
  97                 ctx.cfg.repo_group = xstrdup(value);
  98         else if (!strcmp(name, "repo.url"))
  99                 ctx.repo = cgit_add_repo(value);
 100         else if (!strcmp(name, "repo.name"))
 101                 ctx.repo->name = xstrdup(value);
 102         else if (ctx.repo && !strcmp(name, "repo.path"))
 103                 ctx.repo->path = trim_end(value, '/');
 104         else if (ctx.repo && !strcmp(name, "repo.clone-url"))
 105                 ctx.repo->clone_url = xstrdup(value);
 106         else if (ctx.repo && !strcmp(name, "repo.desc"))
 107                 ctx.repo->desc = xstrdup(value);
 108         else if (ctx.repo && !strcmp(name, "repo.owner"))
 109                 ctx.repo->owner = xstrdup(value);
 110         else if (ctx.repo && !strcmp(name, "repo.defbranch"))
 111                 ctx.repo->defbranch = xstrdup(value);
 112         else if (ctx.repo && !strcmp(name, "repo.snapshots"))
 113                 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 114         else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
 115                 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
 116         else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
 117                 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
 118         else if (ctx.repo && !strcmp(name, "repo.max-stats"))
 119                 ctx.repo->max_stats = cgit_find_stats_period(value, NULL);
 120         else if (ctx.repo && !strcmp(name, "repo.module-link"))
 121                 ctx.repo->module_link= xstrdup(value);
 122         else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
 123                 if (*value == '/')
 124                         ctx.repo->readme = xstrdup(value);
 125                 else
 126                         ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
 127         } else if (!strcmp(name, "include"))
 128                 parse_configfile(value, config_cb);
 129 }
 130
 131 static void querystring_cb(const char *name, const char *value)
 132 {
 133         if (!strcmp(name,"r")) {
 134                 ctx.qry.repo = xstrdup(value);
 135                 ctx.repo = cgit_get_repoinfo(value);
 136         } else if (!strcmp(name, "p")) {
 137                 ctx.qry.page = xstrdup(value);
 138         } else if (!strcmp(name, "url")) {
 139                 ctx.qry.url = xstrdup(value);
 140                 cgit_parse_url(value);
 141         } else if (!strcmp(name, "qt")) {
 142                 ctx.qry.grep = xstrdup(value);
 143         } else if (!strcmp(name, "q")) {
 144                 ctx.qry.search = xstrdup(value);
 145         } else if (!strcmp(name, "h")) {
 146                 ctx.qry.head = xstrdup(value);
 147                 ctx.qry.has_symref = 1;
 148         } else if (!strcmp(name, "id")) {
 149                 ctx.qry.sha1 = xstrdup(value);
 150                 ctx.qry.has_sha1 = 1;
 151         } else if (!strcmp(name, "id2")) {
 152                 ctx.qry.sha2 = xstrdup(value);
 153                 ctx.qry.has_sha1 = 1;
 154         } else if (!strcmp(name, "ofs")) {
 155                 ctx.qry.ofs = atoi(value);
 156         } else if (!strcmp(name, "path")) {
 157                 ctx.qry.path = trim_end(value, '/');
 158         } else if (!strcmp(name, "name")) {
 159                 ctx.qry.name = xstrdup(value);
 160         } else if (!strcmp(name, "mimetype")) {
 161                 ctx.qry.mimetype = xstrdup(value);
 162         } else if (!strcmp(name, "period")) {
 163                 ctx.qry.period = xstrdup(value);
 164         }
 165 }
 166
 167 static void prepare_context(struct cgit_context *ctx)
 168 {
 169         memset(ctx, 0, sizeof(ctx));
 170         ctx->cfg.agefile = "info/web/last-modified";
 171         ctx->cfg.nocache = 0;
 172         ctx->cfg.cache_size = 0;
 173         ctx->cfg.cache_dynamic_ttl = 5;
 174         ctx->cfg.cache_max_create_time = 5;
 175         ctx->cfg.cache_repo_ttl = 5;
 176         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 177         ctx->cfg.cache_root_ttl = 5;
 178         ctx->cfg.cache_static_ttl = -1;
 179         ctx->cfg.css = "/cgit.css";
 180         ctx->cfg.logo = "/git-logo.png";
 181         ctx->cfg.local_time = 0;
 182         ctx->cfg.max_repo_count = 50;
 183         ctx->cfg.max_commit_count = 50;
 184         ctx->cfg.max_lock_attempts = 5;
 185         ctx->cfg.max_msg_len = 80;
 186         ctx->cfg.max_repodesc_len = 80;
 187         ctx->cfg.max_stats = 0;
 188         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
 189         ctx->cfg.renamelimit = -1;
 190         ctx->cfg.robots = "index, nofollow";
 191         ctx->cfg.root_title = "Git repository browser";
 192         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 193         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 194         ctx->cfg.summary_branches = 10;
 195         ctx->cfg.summary_log = 10;
 196         ctx->cfg.summary_tags = 10;
 197         ctx->page.mimetype = "text/html";
 198         ctx->page.charset = PAGE_ENCODING;
 199         ctx->page.filename = NULL;
 200         ctx->page.size = 0;
 201         ctx->page.modified = time(NULL);
 202         ctx->page.expires = ctx->page.modified;
 203 }
 204
 205 struct refmatch {
 206         char *req_ref;
 207         char *first_ref;
 208         int match;
 209 };
 210
 211 int find_current_ref(const char *refname, const unsigned char *sha1,
 212                      int flags, void *cb_data)
 213 {
 214         struct refmatch *info;
 215
 216         info = (struct refmatch *)cb_data;
 217         if (!strcmp(refname, info->req_ref))
 218                 info->match = 1;
 219         if (!info->first_ref)
 220                 info->first_ref = xstrdup(refname);
 221         return info->match;
 222 }
 223
 224 char *find_default_branch(struct cgit_repo *repo)
 225 {
 226         struct refmatch info;
 227         char *ref;
 228
 229         info.req_ref = repo->defbranch;
 230         info.first_ref = NULL;
 231         info.match = 0;
 232         for_each_branch_ref(find_current_ref, &info);
 233         if (info.match)
 234                 ref = info.req_ref;
 235         else
 236                 ref = info.first_ref;
 237         if (ref)
 238                 ref = xstrdup(ref);
 239         return ref;
 240 }
 241
 242 static int prepare_repo_cmd(struct cgit_context *ctx)
 243 {
 244         char *tmp;
 245         unsigned char sha1[20];
 246         int nongit = 0;
 247
 248         setenv("GIT_DIR", ctx->repo->path, 1);
 249         setup_git_directory_gently(&nongit);
 250         if (nongit) {
 251                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 252                                       "config error");
 253                 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
 254                 ctx->repo = NULL;
 255                 cgit_print_http_headers(ctx);
 256                 cgit_print_docstart(ctx);
 257                 cgit_print_pageheader(ctx);
 258                 cgit_print_error(tmp);
 259                 cgit_print_docend();
 260                 return 1;
 261         }
 262         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 263
 264         if (!ctx->qry.head) {
 265                 ctx->qry.nohead = 1;
 266                 ctx->qry.head = find_default_branch(ctx->repo);
 267                 ctx->repo->defbranch = ctx->qry.head;
 268         }
 269
 270         if (!ctx->qry.head) {
 271                 cgit_print_http_headers(ctx);
 272                 cgit_print_docstart(ctx);
 273                 cgit_print_pageheader(ctx);
 274                 cgit_print_error("Repository seems to be empty");
 275                 cgit_print_docend();
 276                 return 1;
 277         }
 278
 279         if (get_sha1(ctx->qry.head, sha1)) {
 280                 tmp = xstrdup(ctx->qry.head);
 281                 ctx->qry.head = ctx->repo->defbranch;
 282                 cgit_print_http_headers(ctx);
 283                 cgit_print_docstart(ctx);
 284                 cgit_print_pageheader(ctx);
 285                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 286                 cgit_print_docend();
 287                 return 1;
 288         }
 289         return 0;
 290 }
 291
 292 static void process_request(void *cbdata)
 293 {
 294         struct cgit_context *ctx = cbdata;
 295         struct cgit_cmd *cmd;
 296
 297         cmd = cgit_get_cmd(ctx);
 298         if (!cmd) {
 299                 ctx->page.title = "cgit error";
 300                 ctx->repo = NULL;
 301                 cgit_print_http_headers(ctx);
 302                 cgit_print_docstart(ctx);
 303                 cgit_print_pageheader(ctx);
 304                 cgit_print_error("Invalid request");
 305                 cgit_print_docend();
 306                 return;
 307         }
 308
 309         if (cmd->want_repo && !ctx->repo) {
 310                 cgit_print_http_headers(ctx);
 311                 cgit_print_docstart(ctx);
 312                 cgit_print_pageheader(ctx);
 313                 cgit_print_error(fmt("No repository selected"));
 314                 cgit_print_docend();
 315                 return;
 316         }
 317
 318         if (ctx->repo && prepare_repo_cmd(ctx))
 319                 return;
 320
 321         if (cmd->want_layout) {
 322                 cgit_print_http_headers(ctx);
 323                 cgit_print_docstart(ctx);
 324                 cgit_print_pageheader(ctx);
 325         }
 326
 327         cmd->fn(ctx);
 328
 329         if (cmd->want_layout)
 330                 cgit_print_docend();
 331 }
 332
 333 int cmp_repos(const void *a, const void *b)
 334 {
 335         const struct cgit_repo *ra = a, *rb = b;
 336         return strcmp(ra->url, rb->url);
 337 }
 338
 339 void print_repo(struct cgit_repo *repo)
 340 {
 341         printf("repo.url=%s\n", repo->url);
 342         printf("repo.name=%s\n", repo->name);
 343         printf("repo.path=%s\n", repo->path);
 344         if (repo->owner)
 345                 printf("repo.owner=%s\n", repo->owner);
 346         if (repo->desc)
 347                 printf("repo.desc=%s\n", repo->desc);
 348         if (repo->readme)
 349                 printf("repo.readme=%s\n", repo->readme);
 350         printf("\n");
 351 }
 352
 353 void print_repolist(struct cgit_repolist *list)
 354 {
 355         int i;
 356
 357         for(i = 0; i < list->count; i++)
 358                 print_repo(&list->repos[i]);
 359 }
 360
 361
 362 static void cgit_parse_args(int argc, const char **argv)
 363 {
 364         int i;
 365         int scan = 0;
 366
 367         for (i = 1; i < argc; i++) {
 368                 if (!strncmp(argv[i], "--cache=", 8)) {
 369                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 370                 }
 371                 if (!strcmp(argv[i], "--nocache")) {
 372                         ctx.cfg.nocache = 1;
 373                 }
 374                 if (!strncmp(argv[i], "--query=", 8)) {
 375                         ctx.qry.raw = xstrdup(argv[i]+8);
 376                 }
 377                 if (!strncmp(argv[i], "--repo=", 7)) {
 378                         ctx.qry.repo = xstrdup(argv[i]+7);
 379                 }
 380                 if (!strncmp(argv[i], "--page=", 7)) {
 381                         ctx.qry.page = xstrdup(argv[i]+7);
 382                 }
 383                 if (!strncmp(argv[i], "--head=", 7)) {
 384                         ctx.qry.head = xstrdup(argv[i]+7);
 385                         ctx.qry.has_symref = 1;
 386                 }
 387                 if (!strncmp(argv[i], "--sha1=", 7)) {
 388                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 389                         ctx.qry.has_sha1 = 1;
 390                 }
 391                 if (!strncmp(argv[i], "--ofs=", 6)) {
 392                         ctx.qry.ofs = atoi(argv[i]+6);
 393                 }
 394                 if (!strncmp(argv[i], "--scan-tree=", 12)) {
 395                         scan++;
 396                         scan_tree(argv[i] + 12);
 397                 }
 398         }
 399         if (scan) {
 400                 qsort(cgit_repolist.repos, cgit_repolist.count,
 401                         sizeof(struct cgit_repo), cmp_repos);
 402                 print_repolist(&cgit_repolist);
 403                 exit(0);
 404         }
 405 }
 406
 407 static int calc_ttl()
 408 {
 409         if (!ctx.repo)
 410                 return ctx.cfg.cache_root_ttl;
 411
 412         if (!ctx.qry.page)
 413                 return ctx.cfg.cache_repo_ttl;
 414
 415         if (ctx.qry.has_symref)
 416                 return ctx.cfg.cache_dynamic_ttl;
 417
 418         if (ctx.qry.has_sha1)
 419                 return ctx.cfg.cache_static_ttl;
 420
 421         return ctx.cfg.cache_repo_ttl;
 422 }
 423
 424 int main(int argc, const char **argv)
 425 {
 426         const char *cgit_config_env = getenv("CGIT_CONFIG");
 427         const char *path;
 428         char *qry;
 429         int err, ttl;
 430
 431         prepare_context(&ctx);
 432         cgit_repolist.length = 0;
 433         cgit_repolist.count = 0;
 434         cgit_repolist.repos = NULL;
 435
 436         if (getenv("SCRIPT_NAME"))
 437                 ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
 438         if (getenv("QUERY_STRING"))
 439                 ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
 440         cgit_parse_args(argc, argv);
 441         parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
 442                          config_cb);
 443         ctx.repo = NULL;
 444         http_parse_querystring(ctx.qry.raw, querystring_cb);
 445
 446         /* If virtual-root isn't specified in cgitrc and no url
 447          * parameter is specified on the querystring, lets pretend
 448          * that virtualroot equals SCRIPT_NAME and use PATH_INFO as
 449          * url. This allows cgit to work with virtual urls without
 450          * the need for rewriterules in the webserver (as long as
 451          * PATH_INFO is included in the cache lookup key).
 452          */
 453         if (!ctx.cfg.virtual_root && !ctx.qry.url) {
 454                 ctx.cfg.virtual_root = ctx.cfg.script_name;
 455                 path = getenv("PATH_INFO");
 456                 if (path) {
 457                         if (path[0] == '/')
 458                                 path++;
 459                         ctx.qry.url = xstrdup(path);
 460                         if (ctx.qry.raw) {
 461                                 qry = ctx.qry.raw;
 462                                 ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
 463                                 free(qry);
 464                         } else
 465                                 ctx.qry.raw = ctx.qry.url;
 466                         cgit_parse_url(ctx.qry.url);
 467                 }
 468         }
 469
 470         ttl = calc_ttl();
 471         ctx.page.expires += ttl*60;
 472         if (ctx.cfg.nocache)
 473                 ctx.cfg.cache_size = 0;
 474         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 475                             ctx.qry.raw, ttl, process_request, &ctx);
 476         if (err)
 477                 cgit_print_error(fmt("Error processing page: %s (%d)",
 478                                      strerror(err), err));
 479         return err;
 480 }