gitweb.ps.run Git - ps-cgit/blob - 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
  11 static const char cgit_doctype[] =
  12 "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
  13 "  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
  14
  15 static const char cgit_error[] =
  16 "<div class='error'>%s</div>";
  17
  18 static const char cgit_lib_error[] =
  19 "<div class='error'>%s: %s</div>";
  20
  21 int htmlfd = 0;
  22
  23 char *cgit_root         = "/usr/src/git";
  24 char *cgit_root_title   = "Git repository browser";
  25 char *cgit_css          = "/cgit.css";
  26 char *cgit_logo         = "/git-logo.png";
  27 char *cgit_logo_link    = "http://www.kernel.org/pub/software/scm/git/docs/";
  28 char *cgit_virtual_root = NULL;
  29
  30 char *cgit_cache_root   = "/var/cache/cgit";
  31
  32 int cgit_cache_root_ttl        =  5;
  33 int cgit_cache_repo_ttl        =  5;
  34 int cgit_cache_dynamic_ttl     =  5;
  35 int cgit_cache_static_ttl      = -1;
  36 int cgit_cache_max_create_time =  5;
  37
  38 char *cgit_repo_name    = NULL;
  39 char *cgit_repo_desc    = NULL;
  40 char *cgit_repo_owner   = NULL;
  41
  42 int cgit_query_has_symref = 0;
  43 int cgit_query_has_sha1   = 0;
  44
  45 char *cgit_querystring  = NULL;
  46 char *cgit_query_repo   = NULL;
  47 char *cgit_query_page   = NULL;
  48 char *cgit_query_head   = NULL;
  49 char *cgit_query_sha1   = NULL;
  50
  51 struct cacheitem cacheitem;
  52
  53 int cgit_parse_query(char *txt, configfn fn)
  54 {
  55         char *t, *value = NULL, c;
  56
  57         if (!txt)
  58                 return 0;
  59
  60         t = txt = xstrdup(txt);
  61
  62         while((c=*t) != '\0') {
  63                 if (c=='=') {
  64                         *t = '\0';
  65                         value = t+1;
  66                 } else if (c=='&') {
  67                         *t = '\0';
  68                         (*fn)(txt, value);
  69                         txt = t+1;
  70                         value = NULL;
  71                 }
  72                 t++;
  73         }
  74         if (t!=txt)
  75                 (*fn)(txt, value);
  76         return 0;
  77 }
  78
  79 void cgit_global_config_cb(const char *name, const char *value)
  80 {
  81         if (!strcmp(name, "root"))
  82                 cgit_root = xstrdup(value);
  83         else if (!strcmp(name, "root-title"))
  84                 cgit_root_title = xstrdup(value);
  85         else if (!strcmp(name, "css"))
  86                 cgit_css = xstrdup(value);
  87         else if (!strcmp(name, "logo"))
  88                 cgit_logo = xstrdup(value);
  89         else if (!strcmp(name, "logo-link"))
  90                 cgit_logo_link = xstrdup(value);
  91         else if (!strcmp(name, "virtual-root"))
  92                 cgit_virtual_root = xstrdup(value);
  93 }
  94
  95 void cgit_repo_config_cb(const char *name, const char *value)
  96 {
  97         if (!strcmp(name, "name"))
  98                 cgit_repo_name = xstrdup(value);
  99         else if (!strcmp(name, "desc"))
 100                 cgit_repo_desc = xstrdup(value);
 101         else if (!strcmp(name, "owner"))
 102                 cgit_repo_owner = xstrdup(value);
 103 }
 104
 105 void cgit_querystring_cb(const char *name, const char *value)
 106 {
 107         if (!strcmp(name,"r"))
 108                 cgit_query_repo = xstrdup(value);
 109         else if (!strcmp(name, "p"))
 110                 cgit_query_page = xstrdup(value);
 111         else if (!strcmp(name, "h")) {
 112                 cgit_query_head = xstrdup(value);
 113                 cgit_query_has_symref = 1;
 114         } else if (!strcmp(name, "id")) {
 115                 cgit_query_sha1 = xstrdup(value);
 116                 cgit_query_has_sha1 = 1;
 117         }
 118 }
 119
 120 char *cgit_repourl(const char *reponame)
 121 {
 122         if (cgit_virtual_root) {
 123                 return fmt("%s/%s/", cgit_virtual_root, reponame);
 124         } else {
 125                 return fmt("?r=%s", reponame);
 126         }
 127 }
 128
 129 char *cgit_pageurl(const char *reponame, const char *pagename,
 130                    const char *query)
 131 {
 132         if (cgit_virtual_root) {
 133                 return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame,
 134                            pagename, query);
 135         } else {
 136                 return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
 137         }
 138 }
 139
 140 static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
 141                                 int flags, void *cb_data)
 142 {
 143         struct commit *commit;
 144         char buf[256], *url;
 145
 146         commit = lookup_commit(sha1);
 147         if (commit && !parse_commit(commit)){
 148                 html("<tr><td>");
 149                 url = cgit_pageurl(cgit_query_repo, "log",
 150                                    fmt("h=%s", refname));
 151                 html_link_open(url, NULL, NULL);
 152                 strncpy(buf, refname, sizeof(buf));
 153                 html_txt(buf);
 154                 html_link_close();
 155                 html("</td><td>");
 156                 pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, buf,
 157                                     sizeof(buf), 0, NULL, NULL, 0);
 158                 html_txt(buf);
 159                 html("</td></tr>\n");
 160         } else {
 161                 html("<tr><td>");
 162                 html_txt(buf);
 163                 html("</td><td>");
 164                 htmlf("*** bad ref %s", sha1_to_hex(sha1));
 165                 html("</td></tr>\n");
 166         }
 167         return 0;
 168 }
 169
 170 /* Sun, 06 Nov 1994 08:49:37 GMT */
 171 static char *http_date(time_t t)
 172 {
 173         static char day[][4] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
 174         static char month[][4] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
 175                                   "Jul", "Aug", "Sep", "Oct", "Now", "Dec"};
 176         struct tm *tm = gmtime(&t);
 177         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm->tm_wday],
 178                    tm->tm_mday, month[tm->tm_mon], 1900+tm->tm_year,
 179                    tm->tm_hour, tm->tm_min, tm->tm_sec);
 180 }
 181
 182 static int ttl_seconds(int ttl)
 183 {
 184         if (ttl<0)
 185                 return 60 * 60 * 24 * 365;
 186         else
 187                 return ttl * 60;
 188 }
 189
 190 static void cgit_print_docstart(char *title)
 191 {
 192         html("Content-Type: text/html; charset=utf-8\n");
 193         htmlf("Last-Modified: %s\n", http_date(cacheitem.st.st_mtime));
 194         htmlf("Expires: %s\n", http_date(cacheitem.st.st_mtime +
 195                                          ttl_seconds(cacheitem.ttl)));
 196         html("\n");
 197         html(cgit_doctype);
 198         html("<html>\n");
 199         html("<head>\n");
 200         html("<title>");
 201         html_txt(title);
 202         html("</title>\n");
 203         html("<link rel='stylesheet' type='text/css' href='");
 204         html_attr(cgit_css);
 205         html("'/>\n");
 206         html("</head>\n");
 207         html("<body>\n");
 208 }
 209
 210 static void cgit_print_docend()
 211 {
 212         html("</body>\n</html>\n");
 213 }
 214
 215 static void cgit_print_pageheader(char *title)
 216 {
 217         html("<div id='header'>");
 218         htmlf("<a href='%s'>", cgit_logo_link);
 219         htmlf("<img id='logo' src='%s'/>\n", cgit_logo);
 220         htmlf("</a>");
 221         html_txt(title);
 222         html("</div>");
 223 }
 224
 225 static void cgit_print_repolist()
 226 {
 227         DIR *d;
 228         struct dirent *de;
 229         struct stat st;
 230         char *name;
 231
 232         chdir(cgit_root);
 233         cgit_print_docstart(cgit_root_title);
 234         cgit_print_pageheader(cgit_root_title);
 235
 236         if (!(d = opendir("."))) {
 237                 htmlf(cgit_lib_error, "Unable to scan repository directory",
 238                       strerror(errno));
 239                 cgit_print_docend();
 240                 return;
 241         }
 242
 243         html("<h2>Repositories</h2>\n");
 244         html("<table class='list'>");
 245         html("<tr><th>Name</th><th>Description</th><th>Owner</th></tr>\n");
 246         while ((de = readdir(d)) != NULL) {
 247                 if (de->d_name[0] == '.')
 248                         continue;
 249                 if (stat(de->d_name, &st) < 0)
 250                         continue;
 251                 if (!S_ISDIR(st.st_mode))
 252                         continue;
 253
 254                 cgit_repo_name = cgit_repo_desc = cgit_repo_owner = NULL;
 255                 name = fmt("%s/info/cgit", de->d_name);
 256                 if (cgit_read_config(name, cgit_repo_config_cb))
 257                         continue;
 258
 259                 html("<tr><td>");
 260                 html_link_open(cgit_repourl(de->d_name), NULL, NULL);
 261                 html_txt(cgit_repo_name);
 262                 html_link_close();
 263                 html("</td><td>");
 264                 html_txt(cgit_repo_desc);
 265                 html("</td><td>");
 266                 html_txt(cgit_repo_owner);
 267                 html("</td></tr>\n");
 268         }
 269         closedir(d);
 270         html("</table>");
 271         cgit_print_docend();
 272 }
 273
 274 static void cgit_print_branches()
 275 {
 276         html("<table class='list'>");
 277         html("<tr><th>Branch name</th><th>Head commit</th></tr>\n");
 278         for_each_branch_ref(cgit_print_branch_cb, NULL);
 279         html("</table>");
 280 }
 281
 282 static int get_one_line(char *txt)
 283 {
 284         char *t;
 285
 286         for(t=txt; *t != '\n' && t != '\0'; t++)
 287                 ;
 288         *t = '\0';
 289         return t-txt-1;
 290 }
 291
 292 static void cgit_print_commit_shortlog(struct commit *commit)
 293 {
 294         char *h, *t, *p;
 295         char *tree = NULL, *author = NULL, *subject = NULL;
 296         int len;
 297         time_t sec;
 298         struct tm *time;
 299         char buf[32];
 300
 301         h = t = commit->buffer;
 302
 303         if (strncmp(h, "tree ", 5))
 304                 die("Bad commit format: %s",
 305                     sha1_to_hex(commit->object.sha1));
 306
 307         len = get_one_line(h);
 308         tree = h+5;
 309         h += len + 2;
 310
 311         while (!strncmp(h, "parent ", 7))
 312                 h += get_one_line(h) + 2;
 313
 314         if (!strncmp(h, "author ", 7)) {
 315                 author = h+7;
 316                 h += get_one_line(h) + 2;
 317                 t = author;
 318                 while(t!=h && *t!='<')
 319                         t++;
 320                 *t='\0';
 321                 p = t;
 322                 while(--t!=author && *t==' ')
 323                         *t='\0';
 324                 while(++p!=h && *p!='>')
 325                         ;
 326                 while(++p!=h && !isdigit(*p))
 327                         ;
 328
 329                 t = p;
 330                 while(++p && isdigit(*p))
 331                         ;
 332                 *p = '\0';
 333                 sec = atoi(t);
 334                 time = gmtime(&sec);
 335         }
 336
 337         while((len = get_one_line(h)) > 0)
 338                 h += len+2;
 339
 340         h++;
 341         len = get_one_line(h);
 342
 343         subject = h;
 344
 345         html("<tr><td>");
 346         strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
 347         html_txt(buf);
 348         html("</td><td>");
 349         char *qry = fmt("id=%s", sha1_to_hex(commit->object.sha1));
 350         char *url = cgit_pageurl(cgit_query_repo, "view", qry);
 351         html_link_open(url, NULL, NULL);
 352         html_txt(subject);
 353         html_link_close();
 354         html("</td><td>");
 355         html_txt(author);
 356         html("</td></tr>\n");
 357 }
 358
 359 static void cgit_print_log(const char *tip, int ofs, int cnt)
 360 {
 361         struct rev_info rev;
 362         struct commit *commit;
 363         const char *argv[2] = {NULL, tip};
 364         int n = 0;
 365
 366         init_revisions(&rev, NULL);
 367         rev.abbrev = DEFAULT_ABBREV;
 368         rev.commit_format = CMIT_FMT_DEFAULT;
 369         rev.verbose_header = 1;
 370         rev.show_root_diff = 0;
 371         setup_revisions(2, argv, &rev, NULL);
 372         prepare_revision_walk(&rev);
 373
 374         html("<h2>Log</h2>");
 375         html("<table class='list'>");
 376         html("<tr><th>Date</th><th>Message</th><th>Author</th></tr>\n");
 377         while ((commit = get_revision(&rev)) != NULL && n++ < 100) {
 378                 cgit_print_commit_shortlog(commit);
 379                 free(commit->buffer);
 380                 commit->buffer = NULL;
 381                 free_commit_list(commit->parents);
 382                 commit->parents = NULL;
 383         }
 384         html("</table>\n");
 385 }
 386
 387 static void cgit_print_repo_summary()
 388 {
 389         html("<h2>");
 390         html_txt("Repo summary page");
 391         html("</h2>");
 392         cgit_print_branches();
 393 }
 394
 395 static void cgit_print_object(char *hex)
 396 {
 397         unsigned char sha1[20];
 398         //struct object *object;
 399         char type[20];
 400         unsigned char *buf;
 401         unsigned long size;
 402
 403         if (get_sha1_hex(hex, sha1)){
 404                 htmlf(cgit_error, "Bad hex value");
 405                 return;
 406         }
 407
 408         if (sha1_object_info(sha1, type, NULL)){
 409                 htmlf(cgit_error, "Bad object name");
 410                 return;
 411         }
 412
 413         buf = read_sha1_file(sha1, type, &size);
 414         if (!buf) {
 415                 htmlf(cgit_error, "Error reading object");
 416                 return;
 417         }
 418
 419         buf[size] = '\0';
 420         html("<h2>Object view</h2>");
 421         htmlf("sha1=%s<br/>type=%s<br/>size=%i<br/>", hex, type, size);
 422         html("<pre>");
 423         html_txt(buf);
 424         html("</pre>");
 425 }
 426
 427 static void cgit_print_repo_page()
 428 {
 429         if (chdir(fmt("%s/%s", cgit_root, cgit_query_repo)) ||
 430             cgit_read_config("info/cgit", cgit_repo_config_cb)) {
 431                 char *title = fmt("%s - %s", cgit_root_title, "Bad request");
 432                 cgit_print_docstart(title);
 433                 cgit_print_pageheader(title);
 434                 htmlf(cgit_lib_error, "Unable to scan repository",
 435                       strerror(errno));
 436                 cgit_print_docend();
 437                 return;
 438         }
 439         setenv("GIT_DIR", fmt("%s/%s", cgit_root, cgit_query_repo), 1);
 440         char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
 441         cgit_print_docstart(title);
 442         cgit_print_pageheader(title);
 443         if (!cgit_query_page)
 444                 cgit_print_repo_summary();
 445         else if (!strcmp(cgit_query_page, "log")) {
 446                 cgit_print_log(cgit_query_head, 0, 100);
 447         } else if (!strcmp(cgit_query_page, "view")) {
 448                 cgit_print_object(cgit_query_sha1);
 449         }
 450         cgit_print_docend();
 451 }
 452
 453 static void cgit_fill_cache(struct cacheitem *item)
 454 {
 455         htmlfd = item->fd;
 456         item->st.st_mtime = time(NULL);
 457         if (cgit_query_repo)
 458                 cgit_print_repo_page();
 459         else
 460                 cgit_print_repolist();
 461 }
 462
 463 static void cgit_refresh_cache(struct cacheitem *item)
 464 {
 465  top:
 466         if (!cache_lookup(item)) {
 467                 if (cache_lock(item)) {
 468                         cgit_fill_cache(item);
 469                         cache_unlock(item);
 470                 } else {
 471                         sched_yield();
 472                         goto top;
 473                 }
 474         } else if (cache_expired(item)) {
 475                 if (cache_lock(item)) {
 476                         cgit_fill_cache(item);
 477                         cache_unlock(item);
 478                 }
 479         }
 480 }
 481
 482 static void cgit_print_cache(struct cacheitem *item)
 483 {
 484         static char buf[4096];
 485         ssize_t i;
 486
 487         int fd = open(item->name, O_RDONLY);
 488         if (fd<0)
 489                 die("Unable to open cached file %s", item->name);
 490
 491         while((i=read(fd, buf, sizeof(buf))) > 0)
 492                 write(STDOUT_FILENO, buf, i);
 493
 494         close(fd);
 495 }
 496
 497 int main(int argc, const char **argv)
 498 {
 499         cgit_read_config("/etc/cgitrc", cgit_global_config_cb);
 500         cgit_querystring = xstrdup(getenv("QUERY_STRING"));
 501         cgit_parse_query(cgit_querystring, cgit_querystring_cb);
 502         cgit_refresh_cache(&cacheitem);
 503         cgit_print_cache(&cacheitem);
 504         return 0;
 505 }