gitweb.ps.run Git - ps-cgit/blob - cgit.c

   1 #include "cgit.h"
   2
   3 static const char cgit_doctype[] =
   4 "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
   5 "  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
   6
   7 static const char cgit_error[] =
   8 "<div class='error'>%s</div>";
   9
  10 static const char cgit_lib_error[] =
  11 "<div class='error'>%s: %s</div>";
  12
  13 int htmlfd = 0;
  14
  15 char *cgit_root         = "/usr/src/git";
  16 char *cgit_root_title   = "Git repository browser";
  17 char *cgit_css          = "/cgit.css";
  18 char *cgit_logo         = "/git-logo.png";
  19 char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
  20 char *cgit_virtual_root = NULL;
  21
  22 char *cgit_cache_root   = "/var/cache/cgit";
  23
  24 int cgit_cache_root_ttl        =  5;
  25 int cgit_cache_repo_ttl        =  5;
  26 int cgit_cache_dynamic_ttl     =  5;
  27 int cgit_cache_static_ttl      = -1;
  28 int cgit_cache_max_create_time =  5;
  29
  30 char *cgit_repo_name    = NULL;
  31 char *cgit_repo_desc    = NULL;
  32 char *cgit_repo_owner   = NULL;
  33
  34 int cgit_query_has_symref = 0;
  35 int cgit_query_has_sha1   = 0;
  36
  37 char *cgit_querystring  = NULL;
  38 char *cgit_query_repo   = NULL;
  39 char *cgit_query_page   = NULL;
  40 char *cgit_query_head   = NULL;
  41 char *cgit_query_sha1   = NULL;
  42
  43 struct cacheitem cacheitem;
  44
  45 int cgit_parse_query(char *txt, configfn fn)
  46 {
  47         char *t, *value = NULL, c;
  48
  49         if (!txt)
  50                 return 0;
  51
  52         t = txt = xstrdup(txt);
  53
  54         while((c=*t) != '\0') {
  55                 if (c=='=') {
  56                         *t = '\0';
  57                         value = t+1;
  58                 } else if (c=='&') {
  59                         *t = '\0';
  60                         (*fn)(txt, value);
  61                         txt = t+1;
  62                         value = NULL;
  63                 }
  64                 t++;
  65         }
  66         if (t!=txt)
  67                 (*fn)(txt, value);
  68         return 0;
  69 }
  70
  71 void cgit_global_config_cb(const char *name, const char *value)
  72 {
  73         if (!strcmp(name, "root"))
  74                 cgit_root = xstrdup(value);
  75         else if (!strcmp(name, "root-title"))
  76                 cgit_root_title = xstrdup(value);
  77         else if (!strcmp(name, "css"))
  78                 cgit_css = xstrdup(value);
  79         else if (!strcmp(name, "logo"))
  80                 cgit_logo = xstrdup(value);
  81         else if (!strcmp(name, "logo-link"))
  82                 cgit_logo_link = xstrdup(value);
  83         else if (!strcmp(name, "virtual-root"))
  84                 cgit_virtual_root = xstrdup(value);
  85 }
  86
  87 void cgit_repo_config_cb(const char *name, const char *value)
  88 {
  89         if (!strcmp(name, "name"))
  90                 cgit_repo_name = xstrdup(value);
  91         else if (!strcmp(name, "desc"))
  92                 cgit_repo_desc = xstrdup(value);
  93         else if (!strcmp(name, "owner"))
  94                 cgit_repo_owner = xstrdup(value);
  95 }
  96
  97 void cgit_querystring_cb(const char *name, const char *value)
  98 {
  99         if (!strcmp(name,"r"))
 100                 cgit_query_repo = xstrdup(value);
 101         else if (!strcmp(name, "p"))
 102                 cgit_query_page = xstrdup(value);
 103         else if (!strcmp(name, "h")) {
 104                 cgit_query_head = xstrdup(value);
 105                 cgit_query_has_symref = 1;
 106         } else if (!strcmp(name, "id")) {
 107                 cgit_query_sha1 = xstrdup(value);
 108                 cgit_query_has_sha1 = 1;
 109         }
 110 }
 111
 112 char *cgit_repourl(const char *reponame)
 113 {
 114         if (cgit_virtual_root) {
 115                 return fmt("%s/%s/", cgit_virtual_root, reponame);
 116         } else {
 117                 return fmt("?r=%s", reponame);
 118         }
 119 }
 120
 121 char *cgit_pageurl(const char *reponame, const char *pagename,
 122                    const char *query)
 123 {
 124         if (cgit_virtual_root) {
 125                 return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame,
 126                            pagename, query);
 127         } else {
 128                 return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
 129         }
 130 }
 131
 132 static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 133                                 int flags, void *cb_data)
 134 {
 135         struct commit *commit;
 136         char buf[256], *url;
 137
 138         commit = lookup_commit(sha1);
 139         if (commit && !parse_commit(commit)){
 140                 html("<tr><td>");
 141                 url = cgit_pageurl(cgit_query_repo, "log",
 142                                    fmt("h=%s", refname));
 143                 html_link_open(url, NULL, NULL);
 144                 strncpy(buf, refname, sizeof(buf));
 145                 html_txt(buf);
 146                 html_link_close();
 147                 html("</td><td>");
 148                 pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, buf,
 149                                     sizeof(buf), 0, NULL, NULL, 0);
 150                 html_txt(buf);
 151                 html("</td></tr>\n");
 152         } else {
 153                 html("<tr><td>");
 154                 html_txt(buf);
 155                 html("</td><td>");
 156                 htmlf("*** bad ref %s", sha1_to_hex(sha1));
 157                 html("</td></tr>\n");
 158         }
 159         return 0;
 160 }
 161
 162 /* Sun, 06 Nov 1994 08:49:37 GMT */
 163 static char *http_date(time_t t)
 164 {
 165         static char day[][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
 166         static char month[][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
 167                                   "Jul", "Aug", "Sep", "Oct", "Now", "Dec"};
 168         struct tm *tm = gmtime(&t);
 169         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
 170                    tm->tm_mday, month[tm->tm_mon], 1900+tm->tm_year,
 171                    tm->tm_hour, tm->tm_min, tm->tm_sec);
 172 }
 173
 174 static int ttl_seconds(int ttl)
 175 {
 176         if (ttl<0)
 177                 return 60 * 60 * 24 * 365;
 178         else
 179                 return ttl * 60;
 180 }
 181
 182 static void cgit_print_docstart(char *title)
 183 {
 184         html("Content-Type: text/html; charset=utf-8\n");
 185         htmlf("Last-Modified: %s\n", http_date(cacheitem.st.st_mtime));
 186         htmlf("Expires: %s\n", http_date(cacheitem.st.st_mtime +
 187                                          ttl_seconds(cacheitem.ttl)));
 188         html("\n");
 189         html(cgit_doctype);
 190         html("<html>\n");
 191         html("<head>\n");
 192         html("<title>");
 193         html_txt(title);
 194         html("</title>\n");
 195         html("<link rel='stylesheet' type='text/css' href='");
 196         html_attr(cgit_css);
 197         html("'/>\n");
 198         html("</head>\n");
 199         html("<body>\n");
 200 }
 201
 202 static void cgit_print_docend()
 203 {
 204         html("</body>\n</html>\n");
 205 }
 206
 207 static void cgit_print_pageheader(char *title)
 208 {
 209         html("<div id='header'>");
 210         htmlf("<a href='%s'>", cgit_logo_link);
 211         htmlf("<img id='logo' src='%s'/>\n", cgit_logo);
 212         htmlf("</a>");
 213         html_txt(title);
 214         html("</div>");
 215 }
 216
 217 static void cgit_print_repolist()
 218 {
 219         DIR *d;
 220         struct dirent *de;
 221         struct stat st;
 222         char *name;
 223
 224         chdir(cgit_root);
 225         cgit_print_docstart(cgit_root_title);
 226         cgit_print_pageheader(cgit_root_title);
 227
 228         if (!(d = opendir("."))) {
 229                 htmlf(cgit_lib_error, "Unable to scan repository directory",
 230                       strerror(errno));
 231                 cgit_print_docend();
 232                 return;
 233         }
 234
 235         html("<h2>Repositories</h2>\n");
 236         html("<table class='list'>");
 237         html("<tr><th>Name</th><th>Description</th><th>Owner</th></tr>\n");
 238         while ((de = readdir(d)) != NULL) {
 239                 if (de->d_name[0] == '.')
 240                         continue;
 241                 if (stat(de->d_name, &st) < 0)
 242                         continue;
 243                 if (!S_ISDIR(st.st_mode))
 244                         continue;
 245
 246                 cgit_repo_name = cgit_repo_desc = cgit_repo_owner = NULL;
 247                 name = fmt("%s/info/cgit", de->d_name);
 248                 if (cgit_read_config(name, cgit_repo_config_cb))
 249                         continue;
 250
 251                 html("<tr><td>");
 252                 html_link_open(cgit_repourl(de->d_name), NULL, NULL);
 253                 html_txt(cgit_repo_name);
 254                 html_link_close();
 255                 html("</td><td>");
 256                 html_txt(cgit_repo_desc);
 257                 html("</td><td>");
 258                 html_txt(cgit_repo_owner);
 259                 html("</td></tr>\n");
 260         }
 261         closedir(d);
 262         html("</table>");
 263         cgit_print_docend();
 264 }
 265
 266 static void cgit_print_branches()
 267 {
 268         html("<table class='list'>");
 269         html("<tr><th>Branch name</th><th>Head commit</th></tr>\n");
 270         for_each_branch_ref(cgit_print_branch_cb, NULL);
 271         html("</table>");
 272 }
 273
 274 static int get_one_line(char *txt)
 275 {
 276         char *t;
 277
 278         for(t=txt; *t != '\n' && t != '\0'; t++)
 279                 ;
 280         *t = '\0';
 281         return t-txt-1;
 282 }
 283
 284 static void cgit_print_commit_shortlog(struct commit *commit)
 285 {
 286         char *h, *t, *p;
 287         char *tree = NULL, *author = NULL, *subject = NULL;
 288         int len;
 289         time_t sec;
 290         struct tm *time;
 291         char buf[32];
 292
 293         h = t = commit->buffer;
 294
 295         if (strncmp(h, "tree ", 5))
 296                 die("Bad commit format: %s",
 297                     sha1_to_hex(commit->object.sha1));
 298
 299         len = get_one_line(h);
 300         tree = h+5;
 301         h += len + 2;
 302
 303         while (!strncmp(h, "parent ", 7))
 304                 h += get_one_line(h) + 2;
 305
 306         if (!strncmp(h, "author ", 7)) {
 307                 author = h+7;
 308                 h += get_one_line(h) + 2;
 309                 t = author;
 310                 while(t!=h && *t!='<')
 311                         t++;
 312                 *t='\0';
 313                 p = t;
 314                 while(--t!=author && *t==' ')
 315                         *t='\0';
 316                 while(++p!=h && *p!='>')
 317                         ;
 318                 while(++p!=h && !isdigit(*p))
 319                         ;
 320
 321                 t = p;
 322                 while(++p && isdigit(*p))
 323                         ;
 324                 *p = '\0';
 325                 sec = atoi(t);
 326                 time = gmtime(&sec);
 327         }
 328
 329         while((len = get_one_line(h)) > 0)
 330                 h += len+2;
 331
 332         h++;
 333         len = get_one_line(h);
 334
 335         subject = h;
 336
 337         html("<tr><td>");
 338         strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
 339         html_txt(buf);
 340         html("</td><td>");
 341         char *qry = fmt("id=%s", sha1_to_hex(commit->object.sha1));
 342         char *url = cgit_pageurl(cgit_query_repo, "view", qry);
 343         html_link_open(url, NULL, NULL);
 344         html_txt(subject);
 345         html_link_close();
 346         html("</td><td>");
 347         html_txt(author);
 348         html("</td></tr>\n");
 349 }
 350
 351 static void cgit_print_log(const char *tip, int ofs, int cnt)
 352 {
 353         struct rev_info rev;
 354         struct commit *commit;
 355         const char *argv[2] = {NULL, tip};
 356         int n = 0;
 357
 358         init_revisions(&rev, NULL);
 359         rev.abbrev = DEFAULT_ABBREV;
 360         rev.commit_format = CMIT_FMT_DEFAULT;
 361         rev.verbose_header = 1;
 362         rev.show_root_diff = 0;
 363         setup_revisions(2, argv, &rev, NULL);
 364         prepare_revision_walk(&rev);
 365
 366         html("<h2>Log</h2>");
 367         html("<table class='list'>");
 368         html("<tr><th>Date</th><th>Message</th><th>Author</th></tr>\n");
 369         while ((commit = get_revision(&rev)) != NULL && n++ < 100) {
 370                 cgit_print_commit_shortlog(commit);
 371                 free(commit->buffer);
 372                 commit->buffer = NULL;
 373                 free_commit_list(commit->parents);
 374                 commit->parents = NULL;
 375         }
 376         html("</table>\n");
 377 }
 378
 379 static void cgit_print_repo_summary()
 380 {
 381         html("<h2>");
 382         html_txt("Repo summary page");
 383         html("</h2>");
 384         cgit_print_branches();
 385 }
 386
 387 static void cgit_print_object(char *hex)
 388 {
 389         unsigned char sha1[20];
 390         //struct object *object;
 391         char type[20];
 392         unsigned char *buf;
 393         unsigned long size;
 394
 395         if (get_sha1_hex(hex, sha1)){
 396                 htmlf(cgit_error, "Bad hex value");
 397                 return;
 398         }
 399
 400         if (sha1_object_info(sha1, type, NULL)){
 401                 htmlf(cgit_error, "Bad object name");
 402                 return;
 403         }
 404
 405         buf = read_sha1_file(sha1, type, &size);
 406         if (!buf) {
 407                 htmlf(cgit_error, "Error reading object");
 408                 return;
 409         }
 410
 411         buf[size] = '\0';
 412         html("<h2>Object view</h2>");
 413         htmlf("sha1=%s<br/>type=%s<br/>size=%i<br/>", hex, type, size);
 414         html("<pre>");
 415         html_txt(buf);
 416         html("</pre>");
 417 }
 418
 419 static void cgit_print_repo_page()
 420 {
 421         if (chdir(fmt("%s/%s", cgit_root, cgit_query_repo)) ||
 422             cgit_read_config("info/cgit", cgit_repo_config_cb)) {
 423                 char *title = fmt("%s - %s", cgit_root_title, "Bad request");
 424                 cgit_print_docstart(title);
 425                 cgit_print_pageheader(title);
 426                 htmlf(cgit_lib_error, "Unable to scan repository",
 427                       strerror(errno));
 428                 cgit_print_docend();
 429                 return;
 430         }
 431         setenv("GIT_DIR", fmt("%s/%s", cgit_root, cgit_query_repo), 1);
 432         char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
 433         cgit_print_docstart(title);
 434         cgit_print_pageheader(title);
 435         if (!cgit_query_page)
 436                 cgit_print_repo_summary();
 437         else if (!strcmp(cgit_query_page, "log")) {
 438                 cgit_print_log(cgit_query_head, 0, 100);
 439         } else if (!strcmp(cgit_query_page, "view")) {
 440                 cgit_print_object(cgit_query_sha1);
 441         }
 442         cgit_print_docend();
 443 }
 444
 445 static void cgit_fill_cache(struct cacheitem *item)
 446 {
 447         htmlfd = item->fd;
 448         item->st.st_mtime = time(NULL);
 449         if (cgit_query_repo)
 450                 cgit_print_repo_page();
 451         else
 452                 cgit_print_repolist();
 453 }
 454
 455 static void cgit_refresh_cache(struct cacheitem *item)
 456 {
 457  top:
 458         if (!cache_lookup(item)) {
 459                 if (cache_lock(item)) {
 460                         cgit_fill_cache(item);
 461                         cache_unlock(item);
 462                 } else {
 463                         sched_yield();
 464                         goto top;
 465                 }
 466         } else if (cache_expired(item)) {
 467                 if (cache_lock(item)) {
 468                         cgit_fill_cache(item);
 469                         cache_unlock(item);
 470                 }
 471         }
 472 }
 473
 474 static void cgit_print_cache(struct cacheitem *item)
 475 {
 476         static char buf[4096];
 477         ssize_t i;
 478
 479         int fd = open(item->name, O_RDONLY);
 480         if (fd<0)
 481                 die("Unable to open cached file %s", item->name);
 482
 483         while((i=read(fd, buf, sizeof(buf))) > 0)
 484                 write(STDOUT_FILENO, buf, i);
 485
 486         close(fd);
 487 }
 488
 489 int main(int argc, const char **argv)
 490 {
 491         cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
 492         cgit_querystring = xstrdup(getenv("QUERY_STRING"));
 493         cgit_parse_query(cgit_querystring, cgit_querystring_cb);
 494         cgit_refresh_cache(&cacheitem);
 495         cgit_print_cache(&cacheitem);
 496         return 0;
 497 }