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