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
  16 const char *cgit_version = CGIT_VERSION;
  17
  18 void config_cb(const char *name, const char *value)
  19 {
  20         if (!strcmp(name, "root-title"))
  21                 ctx.cfg.root_title = xstrdup(value);
  22         else if (!strcmp(name, "root-desc"))
  23                 ctx.cfg.root_desc = xstrdup(value);
  24         else if (!strcmp(name, "root-readme"))
  25                 ctx.cfg.root_readme = xstrdup(value);
  26         else if (!strcmp(name, "css"))
  27                 ctx.cfg.css = xstrdup(value);
  28         else if (!strcmp(name, "favicon"))
  29                 ctx.cfg.favicon = xstrdup(value);
  30         else if (!strcmp(name, "footer"))
  31                 ctx.cfg.footer = xstrdup(value);
  32         else if (!strcmp(name, "logo"))
  33                 ctx.cfg.logo = xstrdup(value);
  34         else if (!strcmp(name, "index-header"))
  35                 ctx.cfg.index_header = xstrdup(value);
  36         else if (!strcmp(name, "index-info"))
  37                 ctx.cfg.index_info = xstrdup(value);
  38         else if (!strcmp(name, "logo-link"))
  39                 ctx.cfg.logo_link = xstrdup(value);
  40         else if (!strcmp(name, "module-link"))
  41                 ctx.cfg.module_link = xstrdup(value);
  42         else if (!strcmp(name, "virtual-root")) {
  43                 ctx.cfg.virtual_root = trim_end(value, '/');
  44                 if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
  45                         ctx.cfg.virtual_root = "";
  46         } else if (!strcmp(name, "nocache"))
  47                 ctx.cfg.nocache = atoi(value);
  48         else if (!strcmp(name, "snapshots"))
  49                 ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
  50         else if (!strcmp(name, "enable-index-links"))
  51                 ctx.cfg.enable_index_links = atoi(value);
  52         else if (!strcmp(name, "enable-log-filecount"))
  53                 ctx.cfg.enable_log_filecount = atoi(value);
  54         else if (!strcmp(name, "enable-log-linecount"))
  55                 ctx.cfg.enable_log_linecount = atoi(value);
  56         else if (!strcmp(name, "cache-size"))
  57                 ctx.cfg.cache_size = atoi(value);
  58         else if (!strcmp(name, "cache-root"))
  59                 ctx.cfg.cache_root = xstrdup(value);
  60         else if (!strcmp(name, "cache-root-ttl"))
  61                 ctx.cfg.cache_root_ttl = atoi(value);
  62         else if (!strcmp(name, "cache-repo-ttl"))
  63                 ctx.cfg.cache_repo_ttl = atoi(value);
  64         else if (!strcmp(name, "cache-static-ttl"))
  65                 ctx.cfg.cache_static_ttl = atoi(value);
  66         else if (!strcmp(name, "cache-dynamic-ttl"))
  67                 ctx.cfg.cache_dynamic_ttl = atoi(value);
  68         else if (!strcmp(name, "max-message-length"))
  69                 ctx.cfg.max_msg_len = atoi(value);
  70         else if (!strcmp(name, "max-repodesc-length"))
  71                 ctx.cfg.max_repodesc_len = atoi(value);
  72         else if (!strcmp(name, "max-repo-count"))
  73                 ctx.cfg.max_repo_count = atoi(value);
  74         else if (!strcmp(name, "max-commit-count"))
  75                 ctx.cfg.max_commit_count = atoi(value);
  76         else if (!strcmp(name, "summary-log"))
  77                 ctx.cfg.summary_log = atoi(value);
  78         else if (!strcmp(name, "summary-branches"))
  79                 ctx.cfg.summary_branches = atoi(value);
  80         else if (!strcmp(name, "summary-tags"))
  81                 ctx.cfg.summary_tags = atoi(value);
  82         else if (!strcmp(name, "agefile"))
  83                 ctx.cfg.agefile = xstrdup(value);
  84         else if (!strcmp(name, "renamelimit"))
  85                 ctx.cfg.renamelimit = atoi(value);
  86         else if (!strcmp(name, "robots"))
  87                 ctx.cfg.robots = xstrdup(value);
  88         else if (!strcmp(name, "clone-prefix"))
  89                 ctx.cfg.clone_prefix = xstrdup(value);
  90         else if (!strcmp(name, "local-time"))
  91                 ctx.cfg.local_time = atoi(value);
  92         else if (!strcmp(name, "repo.group"))
  93                 ctx.cfg.repo_group = xstrdup(value);
  94         else if (!strcmp(name, "repo.url"))
  95                 ctx.repo = cgit_add_repo(value);
  96         else if (!strcmp(name, "repo.name"))
  97                 ctx.repo->name = xstrdup(value);
  98         else if (ctx.repo && !strcmp(name, "repo.path"))
  99                 ctx.repo->path = trim_end(value, '/');
 100         else if (ctx.repo && !strcmp(name, "repo.clone-url"))
 101                 ctx.repo->clone_url = xstrdup(value);
 102         else if (ctx.repo && !strcmp(name, "repo.desc"))
 103                 ctx.repo->desc = xstrdup(value);
 104         else if (ctx.repo && !strcmp(name, "repo.owner"))
 105                 ctx.repo->owner = xstrdup(value);
 106         else if (ctx.repo && !strcmp(name, "repo.defbranch"))
 107                 ctx.repo->defbranch = xstrdup(value);
 108         else if (ctx.repo && !strcmp(name, "repo.snapshots"))
 109                 ctx.repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 110         else if (ctx.repo && !strcmp(name, "repo.enable-log-filecount"))
 111                 ctx.repo->enable_log_filecount = ctx.cfg.enable_log_filecount * atoi(value);
 112         else if (ctx.repo && !strcmp(name, "repo.enable-log-linecount"))
 113                 ctx.repo->enable_log_linecount = ctx.cfg.enable_log_linecount * atoi(value);
 114         else if (ctx.repo && !strcmp(name, "repo.module-link"))
 115                 ctx.repo->module_link= xstrdup(value);
 116         else if (ctx.repo && !strcmp(name, "repo.readme") && value != NULL) {
 117                 if (*value == '/')
 118                         ctx.repo->readme = xstrdup(value);
 119                 else
 120                         ctx.repo->readme = xstrdup(fmt("%s/%s", ctx.repo->path, value));
 121         } else if (!strcmp(name, "include"))
 122                 parse_configfile(value, config_cb);
 123 }
 124
 125 static void querystring_cb(const char *name, const char *value)
 126 {
 127         if (!strcmp(name,"r")) {
 128                 ctx.qry.repo = xstrdup(value);
 129                 ctx.repo = cgit_get_repoinfo(value);
 130         } else if (!strcmp(name, "p")) {
 131                 ctx.qry.page = xstrdup(value);
 132         } else if (!strcmp(name, "url")) {
 133                 cgit_parse_url(value);
 134         } else if (!strcmp(name, "qt")) {
 135                 ctx.qry.grep = xstrdup(value);
 136         } else if (!strcmp(name, "q")) {
 137                 ctx.qry.search = xstrdup(value);
 138         } else if (!strcmp(name, "h")) {
 139                 ctx.qry.head = xstrdup(value);
 140                 ctx.qry.has_symref = 1;
 141         } else if (!strcmp(name, "id")) {
 142                 ctx.qry.sha1 = xstrdup(value);
 143                 ctx.qry.has_sha1 = 1;
 144         } else if (!strcmp(name, "id2")) {
 145                 ctx.qry.sha2 = xstrdup(value);
 146                 ctx.qry.has_sha1 = 1;
 147         } else if (!strcmp(name, "ofs")) {
 148                 ctx.qry.ofs = atoi(value);
 149         } else if (!strcmp(name, "path")) {
 150                 ctx.qry.path = trim_end(value, '/');
 151         } else if (!strcmp(name, "name")) {
 152                 ctx.qry.name = xstrdup(value);
 153         } else if (!strcmp(name, "mimetype")) {
 154                 ctx.qry.mimetype = xstrdup(value);
 155         }
 156 }
 157
 158 static void prepare_context(struct cgit_context *ctx)
 159 {
 160         memset(ctx, 0, sizeof(ctx));
 161         ctx->cfg.agefile = "info/web/last-modified";
 162         ctx->cfg.nocache = 0;
 163         ctx->cfg.cache_size = 0;
 164         ctx->cfg.cache_dynamic_ttl = 5;
 165         ctx->cfg.cache_max_create_time = 5;
 166         ctx->cfg.cache_repo_ttl = 5;
 167         ctx->cfg.cache_root = CGIT_CACHE_ROOT;
 168         ctx->cfg.cache_root_ttl = 5;
 169         ctx->cfg.cache_static_ttl = -1;
 170         ctx->cfg.css = "/cgit.css";
 171         ctx->cfg.logo = "/git-logo.png";
 172         ctx->cfg.local_time = 0;
 173         ctx->cfg.max_repo_count = 50;
 174         ctx->cfg.max_commit_count = 50;
 175         ctx->cfg.max_lock_attempts = 5;
 176         ctx->cfg.max_msg_len = 80;
 177         ctx->cfg.max_repodesc_len = 80;
 178         ctx->cfg.module_link = "./?repo=%s&page=commit&id=%s";
 179         ctx->cfg.renamelimit = -1;
 180         ctx->cfg.robots = "index, nofollow";
 181         ctx->cfg.root_title = "Git repository browser";
 182         ctx->cfg.root_desc = "a fast webinterface for the git dscm";
 183         ctx->cfg.script_name = CGIT_SCRIPT_NAME;
 184         ctx->cfg.summary_branches = 10;
 185         ctx->cfg.summary_log = 10;
 186         ctx->cfg.summary_tags = 10;
 187         ctx->page.mimetype = "text/html";
 188         ctx->page.charset = PAGE_ENCODING;
 189         ctx->page.filename = NULL;
 190         ctx->page.size = 0;
 191         ctx->page.modified = time(NULL);
 192         ctx->page.expires = ctx->page.modified;
 193 }
 194
 195 struct refmatch {
 196         char *req_ref;
 197         char *first_ref;
 198         int match;
 199 };
 200
 201 int find_current_ref(const char *refname, const unsigned char *sha1,
 202                      int flags, void *cb_data)
 203 {
 204         struct refmatch *info;
 205
 206         info = (struct refmatch *)cb_data;
 207         if (!strcmp(refname, info->req_ref))
 208                 info->match = 1;
 209         if (!info->first_ref)
 210                 info->first_ref = xstrdup(refname);
 211         return info->match;
 212 }
 213
 214 char *find_default_branch(struct cgit_repo *repo)
 215 {
 216         struct refmatch info;
 217         char *ref;
 218
 219         info.req_ref = repo->defbranch;
 220         info.first_ref = NULL;
 221         info.match = 0;
 222         for_each_branch_ref(find_current_ref, &info);
 223         if (info.match)
 224                 ref = info.req_ref;
 225         else
 226                 ref = info.first_ref;
 227         if (ref)
 228                 ref = xstrdup(ref);
 229         return ref;
 230 }
 231
 232 static int prepare_repo_cmd(struct cgit_context *ctx)
 233 {
 234         char *tmp;
 235         unsigned char sha1[20];
 236         int nongit = 0;
 237
 238         setenv("GIT_DIR", ctx->repo->path, 1);
 239         setup_git_directory_gently(&nongit);
 240         if (nongit) {
 241                 ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
 242                                       "config error");
 243                 tmp = fmt("Not a git repository: '%s'", ctx->repo->path);
 244                 ctx->repo = NULL;
 245                 cgit_print_http_headers(ctx);
 246                 cgit_print_docstart(ctx);
 247                 cgit_print_pageheader(ctx);
 248                 cgit_print_error(tmp);
 249                 cgit_print_docend();
 250                 return 1;
 251         }
 252         ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
 253
 254         if (!ctx->qry.head) {
 255                 ctx->qry.head = find_default_branch(ctx->repo);
 256                 ctx->repo->defbranch = ctx->qry.head;
 257         }
 258
 259         if (!ctx->qry.head) {
 260                 cgit_print_http_headers(ctx);
 261                 cgit_print_docstart(ctx);
 262                 cgit_print_pageheader(ctx);
 263                 cgit_print_error("Repository seems to be empty");
 264                 cgit_print_docend();
 265                 return 1;
 266         }
 267
 268         if (get_sha1(ctx->qry.head, sha1)) {
 269                 tmp = xstrdup(ctx->qry.head);
 270                 ctx->qry.head = ctx->repo->defbranch;
 271                 cgit_print_http_headers(ctx);
 272                 cgit_print_docstart(ctx);
 273                 cgit_print_pageheader(ctx);
 274                 cgit_print_error(fmt("Invalid branch: %s", tmp));
 275                 cgit_print_docend();
 276                 return 1;
 277         }
 278         return 0;
 279 }
 280
 281 static void process_request(void *cbdata)
 282 {
 283         struct cgit_context *ctx = cbdata;
 284         struct cgit_cmd *cmd;
 285
 286         cmd = cgit_get_cmd(ctx);
 287         if (!cmd) {
 288                 ctx->page.title = "cgit error";
 289                 ctx->repo = NULL;
 290                 cgit_print_http_headers(ctx);
 291                 cgit_print_docstart(ctx);
 292                 cgit_print_pageheader(ctx);
 293                 cgit_print_error("Invalid request");
 294                 cgit_print_docend();
 295                 return;
 296         }
 297
 298         if (cmd->want_repo && !ctx->repo) {
 299                 cgit_print_http_headers(ctx);
 300                 cgit_print_docstart(ctx);
 301                 cgit_print_pageheader(ctx);
 302                 cgit_print_error(fmt("No repository selected"));
 303                 cgit_print_docend();
 304                 return;
 305         }
 306
 307         if (ctx->repo && prepare_repo_cmd(ctx))
 308                 return;
 309
 310         if (cmd->want_layout) {
 311                 cgit_print_http_headers(ctx);
 312                 cgit_print_docstart(ctx);
 313                 cgit_print_pageheader(ctx);
 314         }
 315
 316         cmd->fn(ctx);
 317
 318         if (cmd->want_layout)
 319                 cgit_print_docend();
 320 }
 321
 322 static void cgit_parse_args(int argc, const char **argv)
 323 {
 324         int i;
 325
 326         for (i = 1; i < argc; i++) {
 327                 if (!strncmp(argv[i], "--cache=", 8)) {
 328                         ctx.cfg.cache_root = xstrdup(argv[i]+8);
 329                 }
 330                 if (!strcmp(argv[i], "--nocache")) {
 331                         ctx.cfg.nocache = 1;
 332                 }
 333                 if (!strncmp(argv[i], "--query=", 8)) {
 334                         ctx.qry.raw = xstrdup(argv[i]+8);
 335                 }
 336                 if (!strncmp(argv[i], "--repo=", 7)) {
 337                         ctx.qry.repo = xstrdup(argv[i]+7);
 338                 }
 339                 if (!strncmp(argv[i], "--page=", 7)) {
 340                         ctx.qry.page = xstrdup(argv[i]+7);
 341                 }
 342                 if (!strncmp(argv[i], "--head=", 7)) {
 343                         ctx.qry.head = xstrdup(argv[i]+7);
 344                         ctx.qry.has_symref = 1;
 345                 }
 346                 if (!strncmp(argv[i], "--sha1=", 7)) {
 347                         ctx.qry.sha1 = xstrdup(argv[i]+7);
 348                         ctx.qry.has_sha1 = 1;
 349                 }
 350                 if (!strncmp(argv[i], "--ofs=", 6)) {
 351                         ctx.qry.ofs = atoi(argv[i]+6);
 352                 }
 353         }
 354 }
 355
 356 static int calc_ttl()
 357 {
 358         if (!ctx.repo)
 359                 return ctx.cfg.cache_root_ttl;
 360
 361         if (!ctx.qry.page)
 362                 return ctx.cfg.cache_repo_ttl;
 363
 364         if (ctx.qry.has_symref)
 365                 return ctx.cfg.cache_dynamic_ttl;
 366
 367         if (ctx.qry.has_sha1)
 368                 return ctx.cfg.cache_static_ttl;
 369
 370         return ctx.cfg.cache_repo_ttl;
 371 }
 372
 373 int main(int argc, const char **argv)
 374 {
 375         const char *cgit_config_env = getenv("CGIT_CONFIG");
 376         int err, ttl;
 377
 378         prepare_context(&ctx);
 379         cgit_repolist.length = 0;
 380         cgit_repolist.count = 0;
 381         cgit_repolist.repos = NULL;
 382
 383         parse_configfile(cgit_config_env ? cgit_config_env : CGIT_CONFIG,
 384                          config_cb);
 385         ctx.repo = NULL;
 386         if (getenv("SCRIPT_NAME"))
 387                 ctx.cfg.script_name = xstrdup(getenv("SCRIPT_NAME"));
 388         if (getenv("QUERY_STRING"))
 389                 ctx.qry.raw = xstrdup(getenv("QUERY_STRING"));
 390         cgit_parse_args(argc, argv);
 391         http_parse_querystring(ctx.qry.raw, querystring_cb);
 392
 393         ttl = calc_ttl();
 394         ctx.page.expires += ttl*60;
 395         if (ctx.cfg.nocache)
 396                 ctx.cfg.cache_size = 0;
 397         err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
 398                             ctx.qry.raw, ttl, process_request, &ctx);
 399         if (err)
 400                 cgit_print_error(fmt("Error processing page: %s (%d)",
 401                                      strerror(err), err));
 402         return err;
 403 }