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