ui-shared.c

   1 /* ui-shared.c: common web output functions
   2  *
   3  * Copyright (C) 2006-2017 cgit Development Team <cgit@lists.zx2c4.com>
   4  *
   5  * Licensed under GNU General Public License v2
   6  *   (see COPYING for full license text)
   7  */
   8
   9 #include "cgit.h"
  10 #include "ui-shared.h"
  11 #include "cmd.h"
  12 #include "html.h"
  13 #include "version.h"
  14
  15 static const char cgit_doctype[] =
  16 "<!DOCTYPE html>\n";
  17
  18 static char *http_date(time_t t)
  19 {
  20         static char day[][4] =
  21                 {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
  22         static char month[][4] =
  23                 {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
  24                  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
  25         struct tm tm;
  26         gmtime_r(&t, &tm);
  27         return fmt("%s, %02d %s %04d %02d:%02d:%02d GMT", day[tm.tm_wday],
  28                    tm.tm_mday, month[tm.tm_mon], 1900 + tm.tm_year,
  29                    tm.tm_hour, tm.tm_min, tm.tm_sec);
  30 }
  31
  32 void cgit_print_error(const char *fmt, ...)
  33 {
  34         va_list ap;
  35         va_start(ap, fmt);
  36         cgit_vprint_error(fmt, ap);
  37         va_end(ap);
  38 }
  39
  40 void cgit_vprint_error(const char *fmt, va_list ap)
  41 {
  42         va_list cp;
  43         html("<div class='error'>");
  44         va_copy(cp, ap);
  45         html_vtxtf(fmt, cp);
  46         va_end(cp);
  47         html("</div>\n");
  48 }
  49
  50 const char *cgit_httpscheme(void)
  51 {
  52         if (ctx.env.https && !strcmp(ctx.env.https, "on"))
  53                 return "https://";
  54         else
  55                 return "http://";
  56 }
  57
  58 char *cgit_hosturl(void)
  59 {
  60         if (ctx.env.http_host)
  61                 return xstrdup(ctx.env.http_host);
  62         if (!ctx.env.server_name)
  63                 return NULL;
  64         if (!ctx.env.server_port || atoi(ctx.env.server_port) == 80)
  65                 return xstrdup(ctx.env.server_name);
  66         return fmtalloc("%s:%s", ctx.env.server_name, ctx.env.server_port);
  67 }
  68
  69 char *cgit_currenturl(void)
  70 {
  71         const char *root = cgit_rooturl();
  72
  73         if (!ctx.qry.url)
  74                 return xstrdup(root);
  75         if (root[0] && root[strlen(root) - 1] == '/')
  76                 return fmtalloc("%s%s", root, ctx.qry.url);
  77         return fmtalloc("%s/%s", root, ctx.qry.url);
  78 }
  79
  80 char *cgit_currentfullurl(void)
  81 {
  82         const char *root = cgit_rooturl();
  83         const char *orig_query = ctx.env.query_string ? ctx.env.query_string : "";
  84         size_t len = strlen(orig_query);
  85         char *query = xmalloc(len + 2), *start_url, *ret;
  86
  87         /* Remove all url=... parts from query string */
  88         memcpy(query + 1, orig_query, len + 1);
  89         query[0] = '?';
  90         start_url = query;
  91         while ((start_url = strstr(start_url, "url=")) != NULL) {
  92                 if (start_url[-1] == '?' || start_url[-1] == '&') {
  93                         const char *end_url = strchr(start_url, '&');
  94                         if (end_url)
  95                                 memmove(start_url, end_url + 1, strlen(end_url));
  96                         else
  97                                 start_url[0] = '\0';
  98                 } else
  99                         ++start_url;
 100         }
 101         if (!query[1])
 102                 query[0] = '\0';
 103
 104         if (!ctx.qry.url)
 105                 ret = fmtalloc("%s%s", root, query);
 106         else if (root[0] && root[strlen(root) - 1] == '/')
 107                 ret = fmtalloc("%s%s%s", root, ctx.qry.url, query);
 108         else
 109                 ret = fmtalloc("%s/%s%s", root, ctx.qry.url, query);
 110         free(query);
 111         return ret;
 112 }
 113
 114 const char *cgit_rooturl(void)
 115 {
 116         if (ctx.cfg.virtual_root)
 117                 return ctx.cfg.virtual_root;
 118         else
 119                 return ctx.cfg.script_name;
 120 }
 121
 122 const char *cgit_loginurl(void)
 123 {
 124         static const char *login_url;
 125         if (!login_url)
 126                 login_url = fmtalloc("%s?p=login", cgit_rooturl());
 127         return login_url;
 128 }
 129
 130 char *cgit_repourl(const char *reponame)
 131 {
 132         if (ctx.cfg.virtual_root)
 133                 return fmtalloc("%s%s/", ctx.cfg.virtual_root, reponame);
 134         else
 135                 return fmtalloc("?r=%s", reponame);
 136 }
 137
 138 char *cgit_fileurl(const char *reponame, const char *pagename,
 139                    const char *filename, const char *query)
 140 {
 141         struct strbuf sb = STRBUF_INIT;
 142         char *delim;
 143
 144         if (ctx.cfg.virtual_root) {
 145                 strbuf_addf(&sb, "%s%s/%s/%s", ctx.cfg.virtual_root, reponame,
 146                             pagename, (filename ? filename:""));
 147                 delim = "?";
 148         } else {
 149                 strbuf_addf(&sb, "?url=%s/%s/%s", reponame, pagename,
 150                             (filename ? filename : ""));
 151                 delim = "&amp;";
 152         }
 153         if (query)
 154                 strbuf_addf(&sb, "%s%s", delim, query);
 155         return strbuf_detach(&sb, NULL);
 156 }
 157
 158 char *cgit_pageurl(const char *reponame, const char *pagename,
 159                    const char *query)
 160 {
 161         return cgit_fileurl(reponame, pagename, NULL, query);
 162 }
 163
 164 const char *cgit_repobasename(const char *reponame)
 165 {
 166         /* I assume we don't need to store more than one repo basename */
 167         static char rvbuf[1024];
 168         int p;
 169         const char *rv;
 170         size_t len;
 171
 172         len = strlcpy(rvbuf, reponame, sizeof(rvbuf));
 173         if (len >= sizeof(rvbuf))
 174                 die("cgit_repobasename: truncated repository name '%s'", reponame);
 175         p = len - 1;
 176         /* strip trailing slashes */
 177         while (p && rvbuf[p] == '/')
 178                 rvbuf[p--] = '\0';
 179         /* strip trailing .git */
 180         if (p >= 3 && starts_with(&rvbuf[p-3], ".git")) {
 181                 p -= 3;
 182                 rvbuf[p--] = '\0';
 183         }
 184         /* strip more trailing slashes if any */
 185         while (p && rvbuf[p] == '/')
 186                 rvbuf[p--] = '\0';
 187         /* find last slash in the remaining string */
 188         rv = strrchr(rvbuf, '/');
 189         if (rv)
 190                 return ++rv;
 191         return rvbuf;
 192 }
 193
 194 const char *cgit_snapshot_prefix(const struct cgit_repo *repo)
 195 {
 196         if (repo->snapshot_prefix)
 197                 return repo->snapshot_prefix;
 198
 199         return cgit_repobasename(repo->url);
 200 }
 201
 202 static void site_url(const char *page, const char *search, const char *sort, int ofs, int always_root)
 203 {
 204         char *delim = "?";
 205
 206         if (always_root || page)
 207                 html_attr(cgit_rooturl());
 208         else {
 209                 char *currenturl = cgit_currenturl();
 210                 html_attr(currenturl);
 211                 free(currenturl);
 212         }
 213
 214         if (page) {
 215                 htmlf("?p=%s", page);
 216                 delim = "&amp;";
 217         }
 218         if (search) {
 219                 html(delim);
 220                 html("q=");
 221                 html_attr(search);
 222                 delim = "&amp;";
 223         }
 224         if (sort) {
 225                 html(delim);
 226                 html("s=");
 227                 html_attr(sort);
 228                 delim = "&amp;";
 229         }
 230         if (ofs) {
 231                 html(delim);
 232                 htmlf("ofs=%d", ofs);
 233         }
 234 }
 235
 236 static void site_link(const char *page, const char *name, const char *title,
 237                       const char *class, const char *search, const char *sort, int ofs, int always_root)
 238 {
 239         html("<a");
 240         if (title) {
 241                 html(" title='");
 242                 html_attr(title);
 243                 html("'");
 244         }
 245         if (class) {
 246                 html(" class='");
 247                 html_attr(class);
 248                 html("'");
 249         }
 250         html(" href='");
 251         site_url(page, search, sort, ofs, always_root);
 252         html("'>");
 253         html_txt(name);
 254         html("</a>");
 255 }
 256
 257 void cgit_index_link(const char *name, const char *title, const char *class,
 258                      const char *pattern, const char *sort, int ofs, int always_root)
 259 {
 260         site_link(NULL, name, title, class, pattern, sort, ofs, always_root);
 261 }
 262
 263 static char *repolink(const char *title, const char *class, const char *page,
 264                       const char *head, const char *path)
 265 {
 266         char *delim = "?";
 267
 268         html("<a");
 269         if (title) {
 270                 html(" title='");
 271                 html_attr(title);
 272                 html("'");
 273         }
 274         if (class) {
 275                 html(" class='");
 276                 html_attr(class);
 277                 html("'");
 278         }
 279         html(" href='");
 280         if (ctx.cfg.virtual_root) {
 281                 html_url_path(ctx.cfg.virtual_root);
 282                 html_url_path(ctx.repo->url);
 283                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 284                         html("/");
 285                 if (page) {
 286                         html_url_path(page);
 287                         html("/");
 288                         if (path)
 289                                 html_url_path(path);
 290                 }
 291         } else {
 292                 html_url_path(ctx.cfg.script_name);
 293                 html("?url=");
 294                 html_url_arg(ctx.repo->url);
 295                 if (ctx.repo->url[strlen(ctx.repo->url) - 1] != '/')
 296                         html("/");
 297                 if (page) {
 298                         html_url_arg(page);
 299                         html("/");
 300                         if (path)
 301                                 html_url_arg(path);
 302                 }
 303                 delim = "&amp;";
 304         }
 305         if (head && ctx.repo->defbranch && strcmp(head, ctx.repo->defbranch)) {
 306                 html(delim);
 307                 html("h=");
 308                 html_url_arg(head);
 309                 delim = "&amp;";
 310         }
 311         return fmt("%s", delim);
 312 }
 313
 314 static void reporevlink(const char *page, const char *name, const char *title,
 315                         const char *class, const char *head, const char *rev,
 316                         const char *path)
 317 {
 318         char *delim;
 319
 320         delim = repolink(title, class, page, head, path);
 321         if (rev && ctx.qry.head != NULL && strcmp(rev, ctx.qry.head)) {
 322                 html(delim);
 323                 html("id=");
 324                 html_url_arg(rev);
 325         }
 326         html("'>");
 327         html_txt(name);
 328         html("</a>");
 329 }
 330
 331 void cgit_summary_link(const char *name, const char *title, const char *class,
 332                        const char *head)
 333 {
 334         reporevlink(NULL, name, title, class, head, NULL, NULL);
 335 }
 336
 337 void cgit_tag_link(const char *name, const char *title, const char *class,
 338                    const char *tag)
 339 {
 340         reporevlink("tag", name, title, class, tag, NULL, NULL);
 341 }
 342
 343 void cgit_tree_link(const char *name, const char *title, const char *class,
 344                     const char *head, const char *rev, const char *path)
 345 {
 346         reporevlink("tree", name, title, class, head, rev, path);
 347 }
 348
 349 void cgit_plain_link(const char *name, const char *title, const char *class,
 350                      const char *head, const char *rev, const char *path)
 351 {
 352         reporevlink("plain", name, title, class, head, rev, path);
 353 }
 354
 355 void cgit_blame_link(const char *name, const char *title, const char *class,
 356                      const char *head, const char *rev, const char *path)
 357 {
 358         reporevlink("blame", name, title, class, head, rev, path);
 359 }
 360
 361 void cgit_log_link(const char *name, const char *title, const char *class,
 362                    const char *head, const char *rev, const char *path,
 363                    int ofs, const char *grep, const char *pattern, int showmsg,
 364                    int follow)
 365 {
 366         char *delim;
 367
 368         delim = repolink(title, class, "log", head, path);
 369         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 370                 html(delim);
 371                 html("id=");
 372                 html_url_arg(rev);
 373                 delim = "&amp;";
 374         }
 375         if (grep && pattern) {
 376                 html(delim);
 377                 html("qt=");
 378                 html_url_arg(grep);
 379                 delim = "&amp;";
 380                 html(delim);
 381                 html("q=");
 382                 html_url_arg(pattern);
 383         }
 384         if (ofs > 0) {
 385                 html(delim);
 386                 html("ofs=");
 387                 htmlf("%d", ofs);
 388                 delim = "&amp;";
 389         }
 390         if (showmsg) {
 391                 html(delim);
 392                 html("showmsg=1");
 393                 delim = "&amp;";
 394         }
 395         if (follow) {
 396                 html(delim);
 397                 html("follow=1");
 398         }
 399         html("'>");
 400         html_txt(name);
 401         html("</a>");
 402 }
 403
 404 void cgit_commit_link(const char *name, const char *title, const char *class,
 405                       const char *head, const char *rev, const char *path)
 406 {
 407         char *delim;
 408
 409         delim = repolink(title, class, "commit", head, path);
 410         if (rev && ctx.qry.head && strcmp(rev, ctx.qry.head)) {
 411                 html(delim);
 412                 html("id=");
 413                 html_url_arg(rev);
 414                 delim = "&amp;";
 415         }
 416         if (ctx.qry.difftype) {
 417                 html(delim);
 418                 htmlf("dt=%d", ctx.qry.difftype);
 419                 delim = "&amp;";
 420         }
 421         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 422                 html(delim);
 423                 html("context=");
 424                 htmlf("%d", ctx.qry.context);
 425                 delim = "&amp;";
 426         }
 427         if (ctx.qry.ignorews) {
 428                 html(delim);
 429                 html("ignorews=1");
 430                 delim = "&amp;";
 431         }
 432         if (ctx.qry.follow) {
 433                 html(delim);
 434                 html("follow=1");
 435         }
 436         html("'>");
 437         if (name[0] != '\0') {
 438                 if (strlen(name) > ctx.cfg.max_msg_len && ctx.cfg.max_msg_len >= 15) {
 439                         html_ntxt(name, ctx.cfg.max_msg_len - 3);
 440                         html("...");
 441                 } else
 442                         html_txt(name);
 443         } else
 444                 html_txt("(no commit message)");
 445         html("</a>");
 446 }
 447
 448 void cgit_refs_link(const char *name, const char *title, const char *class,
 449                     const char *head, const char *rev, const char *path)
 450 {
 451         reporevlink("refs", name, title, class, head, rev, path);
 452 }
 453
 454 void cgit_snapshot_link(const char *name, const char *title, const char *class,
 455                         const char *head, const char *rev,
 456                         const char *archivename)
 457 {
 458         reporevlink("snapshot", name, title, class, head, rev, archivename);
 459 }
 460
 461 void cgit_diff_link(const char *name, const char *title, const char *class,
 462                     const char *head, const char *new_rev, const char *old_rev,
 463                     const char *path)
 464 {
 465         char *delim;
 466
 467         delim = repolink(title, class, "diff", head, path);
 468         if (new_rev && ctx.qry.head != NULL && strcmp(new_rev, ctx.qry.head)) {
 469                 html(delim);
 470                 html("id=");
 471                 html_url_arg(new_rev);
 472                 delim = "&amp;";
 473         }
 474         if (old_rev) {
 475                 html(delim);
 476                 html("id2=");
 477                 html_url_arg(old_rev);
 478                 delim = "&amp;";
 479         }
 480         if (ctx.qry.difftype) {
 481                 html(delim);
 482                 htmlf("dt=%d", ctx.qry.difftype);
 483                 delim = "&amp;";
 484         }
 485         if (ctx.qry.context > 0 && ctx.qry.context != 3) {
 486                 html(delim);
 487                 html("context=");
 488                 htmlf("%d", ctx.qry.context);
 489                 delim = "&amp;";
 490         }
 491         if (ctx.qry.ignorews) {
 492                 html(delim);
 493                 html("ignorews=1");
 494                 delim = "&amp;";
 495         }
 496         if (ctx.qry.follow) {
 497                 html(delim);
 498                 html("follow=1");
 499         }
 500         html("'>");
 501         html_txt(name);
 502         html("</a>");
 503 }
 504
 505 void cgit_patch_link(const char *name, const char *title, const char *class,
 506                      const char *head, const char *rev, const char *path)
 507 {
 508         reporevlink("patch", name, title, class, head, rev, path);
 509 }
 510
 511 void cgit_stats_link(const char *name, const char *title, const char *class,
 512                      const char *head, const char *path)
 513 {
 514         reporevlink("stats", name, title, class, head, NULL, path);
 515 }
 516
 517 static void cgit_self_link(char *name, const char *title, const char *class)
 518 {
 519         if (!strcmp(ctx.qry.page, "repolist"))
 520                 cgit_index_link(name, title, class, ctx.qry.search, ctx.qry.sort,
 521                                 ctx.qry.ofs, 1);
 522         else if (!strcmp(ctx.qry.page, "summary"))
 523                 cgit_summary_link(name, title, class, ctx.qry.head);
 524         else if (!strcmp(ctx.qry.page, "tag"))
 525                 cgit_tag_link(name, title, class, ctx.qry.has_oid ?
 526                                ctx.qry.oid : ctx.qry.head);
 527         else if (!strcmp(ctx.qry.page, "tree"))
 528                 cgit_tree_link(name, title, class, ctx.qry.head,
 529                                ctx.qry.has_oid ? ctx.qry.oid : NULL,
 530                                ctx.qry.path);
 531         else if (!strcmp(ctx.qry.page, "plain"))
 532                 cgit_plain_link(name, title, class, ctx.qry.head,
 533                                 ctx.qry.has_oid ? ctx.qry.oid : NULL,
 534                                 ctx.qry.path);
 535         else if (!strcmp(ctx.qry.page, "blame"))
 536                 cgit_blame_link(name, title, class, ctx.qry.head,
 537                                 ctx.qry.has_oid ? ctx.qry.oid : NULL,
 538                                 ctx.qry.path);
 539         else if (!strcmp(ctx.qry.page, "log"))
 540                 cgit_log_link(name, title, class, ctx.qry.head,
 541                               ctx.qry.has_oid ? ctx.qry.oid : NULL,
 542                               ctx.qry.path, ctx.qry.ofs,
 543                               ctx.qry.grep, ctx.qry.search,
 544                               ctx.qry.showmsg, ctx.qry.follow);
 545         else if (!strcmp(ctx.qry.page, "commit"))
 546                 cgit_commit_link(name, title, class, ctx.qry.head,
 547                                  ctx.qry.has_oid ? ctx.qry.oid : NULL,
 548                                  ctx.qry.path);
 549         else if (!strcmp(ctx.qry.page, "patch"))
 550                 cgit_patch_link(name, title, class, ctx.qry.head,
 551                                 ctx.qry.has_oid ? ctx.qry.oid : NULL,
 552                                 ctx.qry.path);
 553         else if (!strcmp(ctx.qry.page, "refs"))
 554                 cgit_refs_link(name, title, class, ctx.qry.head,
 555                                ctx.qry.has_oid ? ctx.qry.oid : NULL,
 556                                ctx.qry.path);
 557         else if (!strcmp(ctx.qry.page, "snapshot"))
 558                 cgit_snapshot_link(name, title, class, ctx.qry.head,
 559                                    ctx.qry.has_oid ? ctx.qry.oid : NULL,
 560                                    ctx.qry.path);
 561         else if (!strcmp(ctx.qry.page, "diff"))
 562                 cgit_diff_link(name, title, class, ctx.qry.head,
 563                                ctx.qry.oid, ctx.qry.oid2,
 564                                ctx.qry.path);
 565         else if (!strcmp(ctx.qry.page, "stats"))
 566                 cgit_stats_link(name, title, class, ctx.qry.head,
 567                                 ctx.qry.path);
 568         else {
 569                 /* Don't known how to make link for this page */
 570                 repolink(title, class, ctx.qry.page, ctx.qry.head, ctx.qry.path);
 571                 html("><!-- cgit_self_link() doesn't know how to make link for page '");
 572                 html_txt(ctx.qry.page);
 573                 html("' -->");
 574                 html_txt(name);
 575                 html("</a>");
 576         }
 577 }
 578
 579 void cgit_object_link(struct object *obj)
 580 {
 581         char *page, *shortrev, *fullrev, *name;
 582
 583         fullrev = oid_to_hex(&obj->oid);
 584         shortrev = xstrdup(fullrev);
 585         shortrev[10] = '\0';
 586         if (obj->type == OBJ_COMMIT) {
 587                 cgit_commit_link(fmt("commit %s...", shortrev), NULL, NULL,
 588                                  ctx.qry.head, fullrev, NULL);
 589                 return;
 590         } else if (obj->type == OBJ_TREE)
 591                 page = "tree";
 592         else if (obj->type == OBJ_TAG)
 593                 page = "tag";
 594         else
 595                 page = "blob";
 596         name = fmt("%s %s...", type_name(obj->type), shortrev);
 597         reporevlink(page, name, NULL, NULL, ctx.qry.head, fullrev, NULL);
 598 }
 599
 600 static struct string_list_item *lookup_path(struct string_list *list,
 601                                             const char *path)
 602 {
 603         struct string_list_item *item;
 604
 605         while (path && path[0]) {
 606                 if ((item = string_list_lookup(list, path)))
 607                         return item;
 608                 if (!(path = strchr(path, '/')))
 609                         break;
 610                 path++;
 611         }
 612         return NULL;
 613 }
 614
 615 void cgit_submodule_link(const char *class, char *path, const char *rev)
 616 {
 617         struct string_list *list;
 618         struct string_list_item *item;
 619         char tail, *dir;
 620         size_t len;
 621
 622         len = 0;
 623         tail = 0;
 624         list = &ctx.repo->submodules;
 625         item = lookup_path(list, path);
 626         if (!item) {
 627                 len = strlen(path);
 628                 tail = path[len - 1];
 629                 if (tail == '/') {
 630                         path[len - 1] = 0;
 631                         item = lookup_path(list, path);
 632                 }
 633         }
 634         if (item || ctx.repo->module_link) {
 635                 html("<a ");
 636                 if (class)
 637                         htmlf("class='%s' ", class);
 638                 html("href='");
 639                 if (item) {
 640                         html_attrf(item->util, rev);
 641                 } else {
 642                         dir = strrchr(path, '/');
 643                         if (dir)
 644                                 dir++;
 645                         else
 646                                 dir = path;
 647                         html_attrf(ctx.repo->module_link, dir, rev);
 648                 }
 649                 html("'>");
 650                 html_txt(path);
 651                 html("</a>");
 652         } else {
 653                 html("<span");
 654                 if (class)
 655                         htmlf(" class='%s'", class);
 656                 html(">");
 657                 html_txt(path);
 658                 html("</span>");
 659         }
 660         html_txtf(" @ %.7s", rev);
 661         if (item && tail)
 662                 path[len - 1] = tail;
 663 }
 664
 665 const struct date_mode *cgit_date_mode(enum date_mode_type type)
 666 {
 667         static struct date_mode mode;
 668         mode.type = type;
 669         mode.local = ctx.cfg.local_time;
 670         return &mode;
 671 }
 672
 673 static void print_rel_date(time_t t, int tz, double value,
 674         const char *class, const char *suffix)
 675 {
 676         htmlf("<span class='%s' title='", class);
 677         html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 678         htmlf("'>%.0f %s</span>", value, suffix);
 679 }
 680
 681 void cgit_print_age(time_t t, int tz, time_t max_relative)
 682 {
 683         time_t now, secs;
 684
 685         if (!t)
 686                 return;
 687         time(&now);
 688         secs = now - t;
 689         if (secs < 0)
 690                 secs = 0;
 691
 692         if (secs > max_relative && max_relative >= 0) {
 693                 html("<span title='");
 694                 html_attr(show_date(t, tz, cgit_date_mode(DATE_ISO8601)));
 695                 html("'>");
 696                 html_txt(show_date(t, tz, cgit_date_mode(DATE_SHORT)));
 697                 html("</span>");
 698                 return;
 699         }
 700
 701         if (secs < TM_HOUR * 2) {
 702                 print_rel_date(t, tz, secs * 1.0 / TM_MIN, "age-mins", "min.");
 703                 return;
 704         }
 705         if (secs < TM_DAY * 2) {
 706                 print_rel_date(t, tz, secs * 1.0 / TM_HOUR, "age-hours", "hours");
 707                 return;
 708         }
 709         if (secs < TM_WEEK * 2) {
 710                 print_rel_date(t, tz, secs * 1.0 / TM_DAY, "age-days", "days");
 711                 return;
 712         }
 713         if (secs < TM_MONTH * 2) {
 714                 print_rel_date(t, tz, secs * 1.0 / TM_WEEK, "age-weeks", "weeks");
 715                 return;
 716         }
 717         if (secs < TM_YEAR * 2) {
 718                 print_rel_date(t, tz, secs * 1.0 / TM_MONTH, "age-months", "months");
 719                 return;
 720         }
 721         print_rel_date(t, tz, secs * 1.0 / TM_YEAR, "age-years", "years");
 722 }
 723
 724 void cgit_print_http_headers(void)
 725 {
 726         if (ctx.env.no_http && !strcmp(ctx.env.no_http, "1"))
 727                 return;
 728
 729         if (ctx.page.status)
 730                 htmlf("Status: %d %s\n", ctx.page.status, ctx.page.statusmsg);
 731         if (ctx.page.mimetype && ctx.page.charset)
 732                 htmlf("Content-Type: %s; charset=%s\n", ctx.page.mimetype,
 733                       ctx.page.charset);
 734         else if (ctx.page.mimetype)
 735                 htmlf("Content-Type: %s\n", ctx.page.mimetype);
 736         if (ctx.page.size)
 737                 htmlf("Content-Length: %zd\n", ctx.page.size);
 738         if (ctx.page.filename) {
 739                 html("Content-Disposition: inline; filename=\"");
 740                 html_header_arg_in_quotes(ctx.page.filename);
 741                 html("\"\n");
 742         }
 743         if (!ctx.env.authenticated)
 744                 html("Cache-Control: no-cache, no-store\n");
 745         htmlf("Last-Modified: %s\n", http_date(ctx.page.modified));
 746         htmlf("Expires: %s\n", http_date(ctx.page.expires));
 747         if (ctx.page.etag)
 748                 htmlf("ETag: \"%s\"\n", ctx.page.etag);
 749         html("\n");
 750         if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
 751                 exit(0);
 752 }
 753
 754 void cgit_redirect(const char *url, bool permanent)
 755 {
 756         htmlf("Status: %d %s\n", permanent ? 301 : 302, permanent ? "Moved" : "Found");
 757         html("Location: ");
 758         html_url_path(url);
 759         html("\n\n");
 760 }
 761
 762 static void print_rel_vcs_link(const char *url)
 763 {
 764         html("<link rel='vcs-git' href='");
 765         html_attr(url);
 766         html("' title='");
 767         html_attr(ctx.repo->name);
 768         html(" Git repository'/>\n");
 769 }
 770
 771 void cgit_print_docstart(void)
 772 {
 773         char *host = cgit_hosturl();
 774
 775         if (ctx.cfg.embedded) {
 776                 if (ctx.cfg.header)
 777                         html_include(ctx.cfg.header);
 778                 return;
 779         }
 780
 781         html(cgit_doctype);
 782         html("<html lang='en'>\n");
 783         html("<head>\n");
 784         html("<title>");
 785         html_txt(ctx.page.title);
 786         html("</title>\n");
 787         htmlf("<meta name='generator' content='cgit %s'/>\n", cgit_version);
 788         if (ctx.cfg.robots && *ctx.cfg.robots)
 789                 htmlf("<meta name='robots' content='%s'/>\n", ctx.cfg.robots);
 790         html("<link rel='stylesheet' type='text/css' href='");
 791         html_attr(ctx.cfg.css);
 792         html("'/>\n");
 793         if (ctx.cfg.favicon) {
 794                 html("<link rel='shortcut icon' href='");
 795                 html_attr(ctx.cfg.favicon);
 796                 html("'/>\n");
 797         }
 798         if (host && ctx.repo && ctx.qry.head) {
 799                 char *fileurl;
 800                 struct strbuf sb = STRBUF_INIT;
 801                 strbuf_addf(&sb, "h=%s", ctx.qry.head);
 802
 803                 html("<link rel='alternate' title='Atom feed' href='");
 804                 html(cgit_httpscheme());
 805                 html_attr(host);
 806                 fileurl = cgit_fileurl(ctx.repo->url, "atom", ctx.qry.vpath,
 807                                        sb.buf);
 808                 html_attr(fileurl);
 809                 html("' type='application/atom+xml'/>\n");
 810                 strbuf_release(&sb);
 811                 free(fileurl);
 812         }
 813         if (ctx.repo)
 814                 cgit_add_clone_urls(print_rel_vcs_link);
 815         if (ctx.cfg.head_include)
 816                 html_include(ctx.cfg.head_include);
 817         if (ctx.repo && ctx.repo->extra_head_content)
 818                 html(ctx.repo->extra_head_content);
 819         html("</head>\n");
 820         html("<body>\n");
 821         if (ctx.cfg.header)
 822                 html_include(ctx.cfg.header);
 823         free(host);
 824 }
 825
 826 void cgit_print_docend(void)
 827 {
 828         html("</div> <!-- class=content -->\n");
 829         if (ctx.cfg.embedded) {
 830                 html("</div> <!-- id=cgit -->\n");
 831                 if (ctx.cfg.footer)
 832                         html_include(ctx.cfg.footer);
 833                 return;
 834         }
 835         if (ctx.cfg.footer)
 836                 html_include(ctx.cfg.footer);
 837         else {
 838                 htmlf("<div class='footer'>generated by <a href='https://git.zx2c4.com/cgit/about/'>cgit %s</a> "
 839                         "(<a href='https://git-scm.com/'>git %s</a>) at ", cgit_version, git_version_string);
 840                 html_txt(show_date(time(NULL), 0, cgit_date_mode(DATE_ISO8601)));
 841                 html("</div>\n");
 842         }
 843         html("</div> <!-- id=cgit -->\n");
 844         html("</body>\n</html>\n");
 845 }
 846
 847 void cgit_print_error_page(int code, const char *msg, const char *fmt, ...)
 848 {
 849         va_list ap;
 850         ctx.page.expires = ctx.cfg.cache_dynamic_ttl;
 851         ctx.page.status = code;
 852         ctx.page.statusmsg = msg;
 853         cgit_print_layout_start();
 854         va_start(ap, fmt);
 855         cgit_vprint_error(fmt, ap);
 856         va_end(ap);
 857         cgit_print_layout_end();
 858 }
 859
 860 void cgit_print_layout_start(void)
 861 {
 862         cgit_print_http_headers();
 863         cgit_print_docstart();
 864         cgit_print_pageheader();
 865 }
 866
 867 void cgit_print_layout_end(void)
 868 {
 869         cgit_print_docend();
 870 }
 871
 872 static void add_clone_urls(void (*fn)(const char *), char *txt, char *suffix)
 873 {
 874         struct strbuf **url_list = strbuf_split_str(txt, ' ', 0);
 875         int i;
 876
 877         for (i = 0; url_list[i]; i++) {
 878                 strbuf_rtrim(url_list[i]);
 879                 if (url_list[i]->len == 0)
 880                         continue;
 881                 if (suffix && *suffix)
 882                         strbuf_addf(url_list[i], "/%s", suffix);
 883                 fn(url_list[i]->buf);
 884         }
 885
 886         strbuf_list_free(url_list);
 887 }
 888
 889 void cgit_add_clone_urls(void (*fn)(const char *))
 890 {
 891         if (ctx.repo->clone_url)
 892                 add_clone_urls(fn, expand_macros(ctx.repo->clone_url), NULL);
 893         else if (ctx.cfg.clone_prefix)
 894                 add_clone_urls(fn, ctx.cfg.clone_prefix, ctx.repo->url);
 895 }
 896
 897 static int print_branch_option(const char *refname, const struct object_id *oid,
 898                                int flags, void *cb_data)
 899 {
 900         char *name = (char *)refname;
 901         html_option(name, name, ctx.qry.head);
 902         return 0;
 903 }
 904
 905 void cgit_add_hidden_formfields(int incl_head, int incl_search,
 906                                 const char *page)
 907 {
 908         if (!ctx.cfg.virtual_root) {
 909                 struct strbuf url = STRBUF_INIT;
 910
 911                 strbuf_addf(&url, "%s/%s", ctx.qry.repo, page);
 912                 if (ctx.qry.vpath)
 913                         strbuf_addf(&url, "/%s", ctx.qry.vpath);
 914                 html_hidden("url", url.buf);
 915                 strbuf_release(&url);
 916         }
 917
 918         if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
 919             strcmp(ctx.qry.head, ctx.repo->defbranch))
 920                 html_hidden("h", ctx.qry.head);
 921
 922         if (ctx.qry.oid)
 923                 html_hidden("id", ctx.qry.oid);
 924         if (ctx.qry.oid2)
 925                 html_hidden("id2", ctx.qry.oid2);
 926         if (ctx.qry.showmsg)
 927                 html_hidden("showmsg", "1");
 928
 929         if (incl_search) {
 930                 if (ctx.qry.grep)
 931                         html_hidden("qt", ctx.qry.grep);
 932                 if (ctx.qry.search)
 933                         html_hidden("q", ctx.qry.search);
 934         }
 935 }
 936
 937 static const char *hc(const char *page)
 938 {
 939         if (!ctx.qry.page)
 940                 return NULL;
 941
 942         return strcmp(ctx.qry.page, page) ? NULL : "active";
 943 }
 944
 945 static void cgit_print_path_crumbs(char *path)
 946 {
 947         char *old_path = ctx.qry.path;
 948         char *p = path, *q, *end = path + strlen(path);
 949         int levels = 0;
 950
 951         ctx.qry.path = NULL;
 952         cgit_self_link("root", NULL, NULL);
 953         ctx.qry.path = p = path;
 954         while (p < end) {
 955                 if (!(q = strchr(p, '/')) || levels > 15)
 956                         q = end;
 957                 *q = '\0';
 958                 html_txt("/");
 959                 cgit_self_link(p, NULL, NULL);
 960                 if (q < end)
 961                         *q = '/';
 962                 p = q + 1;
 963                 ++levels;
 964         }
 965         ctx.qry.path = old_path;
 966 }
 967
 968 static void print_header(void)
 969 {
 970         char *logo = NULL, *logo_link = NULL;
 971
 972         html("<table id='header'>\n");
 973         html("<tr>\n");
 974
 975         if (ctx.repo && ctx.repo->logo && *ctx.repo->logo)
 976                 logo = ctx.repo->logo;
 977         else
 978                 logo = ctx.cfg.logo;
 979         if (ctx.repo && ctx.repo->logo_link && *ctx.repo->logo_link)
 980                 logo_link = ctx.repo->logo_link;
 981         else
 982                 logo_link = ctx.cfg.logo_link;
 983         if (logo && *logo) {
 984                 html("<td class='logo' rowspan='2'><a href='");
 985                 if (logo_link && *logo_link)
 986                         html_attr(logo_link);
 987                 else
 988                         html_attr(cgit_rooturl());
 989                 html("'><img src='");
 990                 html_attr(logo);
 991                 html("' alt='cgit logo'/></a></td>\n");
 992         }
 993
 994         html("<td class='main'>");
 995         if (ctx.repo) {
 996                 cgit_index_link("index", NULL, NULL, NULL, NULL, 0, 1);
 997                 html(" : ");
 998                 cgit_summary_link(ctx.repo->name, ctx.repo->name, NULL, NULL);
 999                 if (ctx.env.authenticated) {
1000                         html("</td><td class='form'>");
1001                         html("<form method='get'>\n");
1002                         cgit_add_hidden_formfields(0, 1, ctx.qry.page);
1003                         html("<select name='h' onchange='this.form.submit();'>\n");
1004                         for_each_branch_ref(print_branch_option, ctx.qry.head);
1005                         if (ctx.repo->enable_remote_branches)
1006                                 for_each_remote_ref(print_branch_option, ctx.qry.head);
1007                         html("</select> ");
1008                         html("<input type='submit' value='switch'/>");
1009                         html("</form>");
1010                 }
1011         } else
1012                 html_txt(ctx.cfg.root_title);
1013         html("</td></tr>\n");
1014
1015         html("<tr><td class='sub'>");
1016         if (ctx.repo) {
1017                 html_txt(ctx.repo->desc);
1018                 html("</td><td class='sub right'>");
1019                 html_txt(ctx.repo->owner);
1020         } else {
1021                 if (ctx.cfg.root_desc)
1022                         html_txt(ctx.cfg.root_desc);
1023         }
1024         html("</td></tr></table>\n");
1025 }
1026
1027 void cgit_print_pageheader(void)
1028 {
1029         html("<div id='cgit'>");
1030         if (!ctx.env.authenticated || !ctx.cfg.noheader)
1031                 print_header();
1032
1033         html("<table class='tabs'><tr><td>\n");
1034         if (ctx.env.authenticated && ctx.repo) {
1035                 if (ctx.repo->readme.nr)
1036                         reporevlink("about", "about", NULL,
1037                                     hc("about"), ctx.qry.head, NULL,
1038                                     NULL);
1039                 cgit_summary_link("summary", NULL, hc("summary"),
1040                                   ctx.qry.head);
1041                 cgit_refs_link("refs", NULL, hc("refs"), ctx.qry.head,
1042                                ctx.qry.oid, NULL);
1043                 cgit_log_link("log", NULL, hc("log"), ctx.qry.head,
1044                               NULL, ctx.qry.vpath, 0, NULL, NULL,
1045                               ctx.qry.showmsg, ctx.qry.follow);
1046                 if (ctx.qry.page && !strcmp(ctx.qry.page, "blame"))
1047                         cgit_blame_link("blame", NULL, hc("blame"), ctx.qry.head,
1048                                         ctx.qry.oid, ctx.qry.vpath);
1049                 else
1050                         cgit_tree_link("tree", NULL, hc("tree"), ctx.qry.head,
1051                                        ctx.qry.oid, ctx.qry.vpath);
1052                 cgit_commit_link("commit", NULL, hc("commit"),
1053                                  ctx.qry.head, ctx.qry.oid, ctx.qry.vpath);
1054                 cgit_diff_link("diff", NULL, hc("diff"), ctx.qry.head,
1055                                ctx.qry.oid, ctx.qry.oid2, ctx.qry.vpath);
1056                 if (ctx.repo->max_stats)
1057                         cgit_stats_link("stats", NULL, hc("stats"),
1058                                         ctx.qry.head, ctx.qry.vpath);
1059                 if (ctx.repo->homepage) {
1060                         html("<a href='");
1061                         html_attr(ctx.repo->homepage);
1062                         html("'>homepage</a>");
1063                 }
1064                 html("</td><td class='form'>");
1065                 html("<form class='right' method='get' action='");
1066                 if (ctx.cfg.virtual_root) {
1067                         char *fileurl = cgit_fileurl(ctx.qry.repo, "log",
1068                                                    ctx.qry.vpath, NULL);
1069                         html_url_path(fileurl);
1070                         free(fileurl);
1071                 }
1072                 html("'>\n");
1073                 cgit_add_hidden_formfields(1, 0, "log");
1074                 html("<select name='qt'>\n");
1075                 html_option("grep", "log msg", ctx.qry.grep);
1076                 html_option("author", "author", ctx.qry.grep);
1077                 html_option("committer", "committer", ctx.qry.grep);
1078                 html_option("range", "range", ctx.qry.grep);
1079                 html("</select>\n");
1080                 html("<input class='txt' type='search' size='10' name='q' value='");
1081                 html_attr(ctx.qry.search);
1082                 html("'/>\n");
1083                 html("<input type='submit' value='search'/>\n");
1084                 html("</form>\n");
1085         } else if (ctx.env.authenticated) {
1086                 char *currenturl = cgit_currenturl();
1087                 site_link(NULL, "index", NULL, hc("repolist"), NULL, NULL, 0, 1);
1088                 if (ctx.cfg.root_readme)
1089                         site_link("about", "about", NULL, hc("about"),
1090                                   NULL, NULL, 0, 1);
1091                 html("</td><td class='form'>");
1092                 html("<form method='get' action='");
1093                 html_attr(currenturl);
1094                 html("'>\n");
1095                 html("<input type='search' name='q' size='10' value='");
1096                 html_attr(ctx.qry.search);
1097                 html("'/>\n");
1098                 html("<input type='submit' value='search'/>\n");
1099                 html("</form>");
1100                 free(currenturl);
1101         }
1102         html("</td></tr></table>\n");
1103         if (ctx.env.authenticated && ctx.repo && ctx.qry.vpath) {
1104                 html("<div class='path'>");
1105                 html("path: ");
1106                 cgit_print_path_crumbs(ctx.qry.vpath);
1107                 if (ctx.cfg.enable_follow_links && !strcmp(ctx.qry.page, "log")) {
1108                         html(" (");
1109                         ctx.qry.follow = !ctx.qry.follow;
1110                         cgit_self_link(ctx.qry.follow ? "follow" : "unfollow",
1111                                         NULL, NULL);
1112                         ctx.qry.follow = !ctx.qry.follow;
1113                         html(")");
1114                 }
1115                 html("</div>");
1116         }
1117         html("<div class='content'>");
1118 }
1119
1120 void cgit_print_filemode(unsigned short mode)
1121 {
1122         if (S_ISDIR(mode))
1123                 html("d");
1124         else if (S_ISLNK(mode))
1125                 html("l");
1126         else if (S_ISGITLINK(mode))
1127                 html("m");
1128         else
1129                 html("-");
1130         html_fileperm(mode >> 6);
1131         html_fileperm(mode >> 3);
1132         html_fileperm(mode);
1133 }
1134
1135 void cgit_compose_snapshot_prefix(struct strbuf *filename, const char *base,
1136                                   const char *ref)
1137 {
1138         struct object_id oid;
1139
1140         /*
1141          * Prettify snapshot names by stripping leading "v" or "V" if the tag
1142          * name starts with {v,V}[0-9] and the prettify mapping is injective,
1143          * i.e. each stripped tag can be inverted without ambiguities.
1144          */
1145         if (get_oid(fmt("refs/tags/%s", ref), &oid) == 0 &&
1146             (ref[0] == 'v' || ref[0] == 'V') && isdigit(ref[1]) &&
1147             ((get_oid(fmt("refs/tags/%s", ref + 1), &oid) == 0) +
1148              (get_oid(fmt("refs/tags/v%s", ref + 1), &oid) == 0) +
1149              (get_oid(fmt("refs/tags/V%s", ref + 1), &oid) == 0) == 1))
1150                 ref++;
1151
1152         strbuf_addf(filename, "%s-%s", base, ref);
1153 }
1154
1155 void cgit_print_snapshot_links(const struct cgit_repo *repo, const char *ref,
1156                                const char *separator)
1157 {
1158         const struct cgit_snapshot_format *f;
1159         struct strbuf filename = STRBUF_INIT;
1160         const char *basename;
1161         size_t prefixlen;
1162
1163         basename = cgit_snapshot_prefix(repo);
1164         if (starts_with(ref, basename))
1165                 strbuf_addstr(&filename, ref);
1166         else
1167                 cgit_compose_snapshot_prefix(&filename, basename, ref);
1168
1169         prefixlen = filename.len;
1170         for (f = cgit_snapshot_formats; f->suffix; f++) {
1171                 if (!(repo->snapshots & cgit_snapshot_format_bit(f)))
1172                         continue;
1173                 strbuf_setlen(&filename, prefixlen);
1174                 strbuf_addstr(&filename, f->suffix);
1175                 cgit_snapshot_link(filename.buf, NULL, NULL, NULL, NULL,
1176                                    filename.buf);
1177                 if (cgit_snapshot_get_sig(ref, f)) {
1178                         strbuf_addstr(&filename, ".asc");
1179                         html(" (");
1180                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1181                                            filename.buf);
1182                         html(")");
1183                 } else if (starts_with(f->suffix, ".tar") && cgit_snapshot_get_sig(ref, &cgit_snapshot_formats[0])) {
1184                         strbuf_setlen(&filename, strlen(filename.buf) - strlen(f->suffix));
1185                         strbuf_addstr(&filename, ".tar.asc");
1186                         html(" (");
1187                         cgit_snapshot_link("sig", NULL, NULL, NULL, NULL,
1188                                            filename.buf);
1189                         html(")");
1190                 }
1191                 html(separator);
1192         }
1193         strbuf_release(&filename);
1194 }
1195
1196 void cgit_set_title_from_path(const char *path)
1197 {
1198         struct strbuf sb = STRBUF_INIT;
1199         const char *slash, *last_slash;
1200
1201         if (!path)
1202                 return;
1203
1204         for (last_slash = path + strlen(path); (slash = memrchr(path, '/', last_slash - path)) != NULL; last_slash = slash) {
1205                 strbuf_add(&sb, slash + 1, last_slash - slash - 1);
1206                 strbuf_addstr(&sb, " \xc2\xab ");
1207         }
1208         strbuf_add(&sb, path, last_slash - path);
1209         strbuf_addf(&sb, " - %s", ctx.page.title);
1210         ctx.page.title = strbuf_detach(&sb, NULL);
1211 }