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