stagit.c

   1 #include <sys/stat.h>
   2
   3 #include <err.h>
   4 #include <errno.h>
   5 #include <inttypes.h>
   6 #include <libgen.h>
   7 #include <limits.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12
  13 #include <git2.h>
  14
  15 #include "compat.h"
  16 #include "config.h"
  17
  18 struct commitinfo {
  19         const git_oid *id;
  20
  21         char oid[GIT_OID_HEXSZ + 1];
  22         char parentoid[GIT_OID_HEXSZ + 1];
  23
  24         const git_signature *author;
  25         const char          *summary;
  26         const char          *msg;
  27
  28         git_diff_stats *stats;
  29         git_diff       *diff;
  30         git_commit     *commit;
  31         git_commit     *parent;
  32         git_tree       *commit_tree;
  33         git_tree       *parent_tree;
  34
  35         size_t addcount;
  36         size_t delcount;
  37         size_t filecount;
  38 };
  39
  40 static git_repository *repo;
  41
  42 static const char *relpath = "";
  43 static const char *repodir;
  44
  45 static char *name;
  46 static char *stripped_name;
  47 static char description[255];
  48 static char cloneurl[1024];
  49 static int hasreadme, haslicense;
  50
  51 void
  52 commitinfo_free(struct commitinfo *ci)
  53 {
  54         if (!ci)
  55                 return;
  56
  57         git_diff_stats_free(ci->stats);
  58         git_diff_free(ci->diff);
  59         git_tree_free(ci->commit_tree);
  60         git_tree_free(ci->parent_tree);
  61         git_commit_free(ci->commit);
  62 }
  63
  64 struct commitinfo *
  65 commitinfo_getbyoid(const git_oid *id)
  66 {
  67         struct commitinfo *ci;
  68         git_diff_options opts;
  69         int error;
  70
  71         if (!(ci = calloc(1, sizeof(struct commitinfo))))
  72                 err(1, "calloc");
  73
  74         ci->id = id;
  75         if (git_commit_lookup(&(ci->commit), repo, id))
  76                 goto err;
  77
  78         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
  79         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
  80
  81         ci->author = git_commit_author(ci->commit);
  82         ci->summary = git_commit_summary(ci->commit);
  83         ci->msg = git_commit_message(ci->commit);
  84
  85         if ((error = git_commit_tree(&(ci->commit_tree), ci->commit)))
  86                 goto err;
  87         if (!(error = git_commit_parent(&(ci->parent), ci->commit, 0))) {
  88                 if ((error = git_commit_tree(&(ci->parent_tree), ci->parent)))
  89                         goto err;
  90         } else {
  91                 ci->parent = NULL;
  92                 ci->parent_tree = NULL;
  93         }
  94
  95         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
  96         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
  97         if ((error = git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts)))
  98                 goto err;
  99         if (git_diff_get_stats(&(ci->stats), ci->diff))
 100                 goto err;
 101
 102         ci->addcount = git_diff_stats_insertions(ci->stats);
 103         ci->delcount = git_diff_stats_deletions(ci->stats);
 104         ci->filecount = git_diff_stats_files_changed(ci->stats);
 105
 106         return ci;
 107
 108 err:
 109         commitinfo_free(ci);
 110         free(ci);
 111
 112         return NULL;
 113 }
 114
 115 FILE *
 116 efopen(const char *name, const char *flags)
 117 {
 118         FILE *fp;
 119
 120         if (!(fp = fopen(name, flags)))
 121                 err(1, "fopen");
 122
 123         return fp;
 124 }
 125
 126 /* Escape characters below as HTML 2.0 / XML 1.0. */
 127 void
 128 xmlencode(FILE *fp, const char *s, size_t len)
 129 {
 130         size_t i;
 131
 132         for (i = 0; *s && i < len; s++, i++) {
 133                 switch(*s) {
 134                 case '<':  fputs("&lt;",   fp); break;
 135                 case '>':  fputs("&gt;",   fp); break;
 136                 case '\'': fputs("&apos;", fp); break;
 137                 case '&':  fputs("&amp;",  fp); break;
 138                 case '"':  fputs("&quot;", fp); break;
 139                 default:   fputc(*s, fp);
 140                 }
 141         }
 142 }
 143
 144 /* Some implementations of dirname(3) return a pointer to a static
 145  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 146  * This is a wrapper function that is compatible with both versions.
 147  * The program will error out if dirname(3) failed, this can only happen
 148  * with the OpenBSD version. */
 149 char *
 150 xdirname(const char *path)
 151 {
 152         char *p, *b;
 153
 154         if (!(p = strdup(path)))
 155                 err(1, "strdup");
 156         if (!(b = dirname(p)))
 157                 err(1, "dirname");
 158         if (!(b = strdup(b)))
 159                 err(1, "strdup");
 160         free(p);
 161
 162         return b;
 163 }
 164
 165 /* Some implementations of basename(3) return a pointer to a static
 166  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 167  * This is a wrapper function that is compatible with both versions.
 168  * The program will error out if basename(3) failed, this can only happen
 169  * with the OpenBSD version. */
 170 char *
 171 xbasename(const char *path)
 172 {
 173         char *p, *b;
 174
 175         if (!(p = strdup(path)))
 176                 err(1, "strdup");
 177         if (!(b = basename(p)))
 178                 err(1, "basename");
 179         if (!(b = strdup(b)))
 180                 err(1, "strdup");
 181         free(p);
 182
 183         return b;
 184 }
 185
 186 int
 187 mkdirp(const char *path)
 188 {
 189         char tmp[PATH_MAX], *p;
 190
 191         strlcpy(tmp, path, sizeof(tmp));
 192         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 193                 if (*p != '/')
 194                         continue;
 195                 *p = '\0';
 196                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 197                         return -1;
 198                 *p = '/';
 199         }
 200         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 201                 return -1;
 202         return 0;
 203 }
 204
 205 void
 206 printtimeformat(FILE *fp, const git_time *intime, const char *fmt)
 207 {
 208         struct tm *intm;
 209         time_t t;
 210         char out[32];
 211
 212         t = (time_t) intime->time + (intime->offset * 60);
 213         intm = gmtime(&t);
 214         strftime(out, sizeof(out), fmt, intm);
 215         fputs(out, fp);
 216 }
 217
 218 void
 219 printtimez(FILE *fp, const git_time *intime)
 220 {
 221         printtimeformat(fp, intime, "%Y-%m-%dT%H:%M:%SZ");
 222 }
 223
 224 void
 225 printtime(FILE *fp, const git_time *intime)
 226 {
 227         printtimeformat(fp, intime, "%a %b %e %T %Y");
 228 }
 229
 230 void
 231 printtimeshort(FILE *fp, const git_time *intime)
 232 {
 233         printtimeformat(fp, intime, "%Y-%m-%d %H:%M");
 234 }
 235
 236 int
 237 writeheader(FILE *fp)
 238 {
 239         fputs("<!DOCTYPE HTML>"
 240                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 241                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 242                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 243         xmlencode(fp, stripped_name, strlen(stripped_name));
 244         if (description[0])
 245                 fputs(" - ", fp);
 246         xmlencode(fp, description, strlen(description));
 247         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 248         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 249                 name, relpath);
 250         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 251         fputs("</head>\n<body>\n<table><tr><td>", fp);
 252         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 253                 relpath, relpath);
 254         fputs("</td><td><h1>", fp);
 255         xmlencode(fp, stripped_name, strlen(stripped_name));
 256         fputs("</h1><span class=\"desc\">", fp);
 257         xmlencode(fp, description, strlen(description));
 258         fputs("</span></td></tr>", fp);
 259         if (cloneurl[0]) {
 260                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 261                 xmlencode(fp, cloneurl, strlen(cloneurl));
 262                 fputs("\">", fp);
 263                 xmlencode(fp, cloneurl, strlen(cloneurl));
 264                 fputs("</a></td></tr>", fp);
 265         }
 266         fputs("<tr><td></td><td>\n", fp);
 267         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 268         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 269         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 270         if (hasreadme)
 271                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 272         if (haslicense)
 273                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 274         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 275
 276         return 0;
 277 }
 278
 279 int
 280 writefooter(FILE *fp)
 281 {
 282         return !fputs("</div>\n</body>\n</html>\n", fp);
 283 }
 284
 285 int
 286 writeblobhtml(FILE *fp, const git_blob *blob)
 287 {
 288         off_t i;
 289         size_t n = 0;
 290         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 291         const char *s = git_blob_rawcontent(blob);
 292         git_off_t len = git_blob_rawsize(blob);
 293
 294         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 295
 296         if (len) {
 297                 n++;
 298                 fprintf(fp, nfmt, n, n, n);
 299                 for (i = 0; i < len - 1; i++) {
 300                         if (s[i] == '\n') {
 301                                 n++;
 302                                 fprintf(fp, nfmt, n, n, n);
 303                         }
 304                 }
 305         }
 306
 307         fputs("</pre></td><td><pre>\n", fp);
 308         xmlencode(fp, s, (size_t)len);
 309         fputs("</pre></td></tr></table>\n", fp);
 310
 311         return n;
 312 }
 313
 314 void
 315 printcommit(FILE *fp, struct commitinfo *ci)
 316 {
 317         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 318                 relpath, ci->oid, ci->oid);
 319
 320         if (ci->parentoid[0])
 321                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 322                         relpath, ci->parentoid, ci->parentoid);
 323
 324         if (ci->author) {
 325                 fputs("<b>Author:</b> ", fp);
 326                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 327                 fputs(" &lt;<a href=\"mailto:", fp);
 328                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 329                 fputs("\">", fp);
 330                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 331                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 332                 printtime(fp, &(ci->author->when));
 333                 fputc('\n', fp);
 334         }
 335         if (ci->msg) {
 336                 fputc('\n', fp);
 337                 xmlencode(fp, ci->msg, strlen(ci->msg));
 338                 fputc('\n', fp);
 339         }
 340 }
 341
 342 void
 343 printshowfile(FILE *fp, struct commitinfo *ci)
 344 {
 345         const git_diff_delta *delta;
 346         const git_diff_hunk *hunk;
 347         const git_diff_line *line;
 348         git_patch *patch;
 349         git_buf statsbuf;
 350         size_t ndeltas, nhunks, nhunklines;
 351         size_t i, j, k;
 352
 353         printcommit(fp, ci);
 354
 355         memset(&statsbuf, 0, sizeof(statsbuf));
 356
 357         /* diff stat */
 358         if (ci->stats &&
 359             !git_diff_stats_to_buf(&statsbuf, ci->stats,
 360                                    GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) {
 361                 if (statsbuf.ptr && statsbuf.ptr[0]) {
 362                         fputs("<b>Diffstat:</b>\n", fp);
 363                         xmlencode(fp, statsbuf.ptr, strlen(statsbuf.ptr));
 364                 }
 365         }
 366
 367         fputs("<hr/>", fp);
 368
 369         ndeltas = git_diff_num_deltas(ci->diff);
 370         for (i = 0; i < ndeltas; i++) {
 371                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 372                         git_patch_free(patch);
 373                         break;
 374                 }
 375
 376                 delta = git_patch_get_delta(patch);
 377                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 378                         relpath, delta->old_file.path, delta->old_file.path,
 379                         relpath, delta->new_file.path, delta->new_file.path);
 380
 381                 /* check binary data */
 382                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 383                         fputs("Binary files differ\n", fp);
 384                         git_patch_free(patch);
 385                         continue;
 386                 }
 387
 388                 nhunks = git_patch_num_hunks(patch);
 389                 for (j = 0; j < nhunks; j++) {
 390                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 391                                 break;
 392
 393                         fprintf(fp, "<a href=\"#h%zu\" id=\"h%zu\" class=\"h\">", j, j);
 394                         xmlencode(fp, hunk->header, hunk->header_len);
 395                         fputs("</a>", fp);
 396
 397                         for (k = 0; ; k++) {
 398                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 399                                         break;
 400                                 if (line->old_lineno == -1)
 401                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"i\">+",
 402                                                 j, k, j, k);
 403                                 else if (line->new_lineno == -1)
 404                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"d\">-",
 405                                                 j, k, j, k);
 406                                 else
 407                                         fputc(' ', fp);
 408                                 xmlencode(fp, line->content, line->content_len);
 409                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 410                                         fputs("</a>", fp);
 411                         }
 412                 }
 413                 git_patch_free(patch);
 414         }
 415         git_buf_free(&statsbuf);
 416
 417         return;
 418 }
 419
 420 int
 421 writelog(FILE *fp, const git_oid *oid)
 422 {
 423         struct commitinfo *ci;
 424         git_revwalk *w = NULL;
 425         git_oid id;
 426         size_t len;
 427         char path[PATH_MAX];
 428         FILE *fpfile;
 429
 430         git_revwalk_new(&w, repo);
 431         git_revwalk_push(w, oid);
 432         git_revwalk_sorting(w, GIT_SORT_TIME);
 433         git_revwalk_simplify_first_parent(w);
 434
 435         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
 436                   "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 437                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 438
 439         while (!git_revwalk_next(&id, w)) {
 440                 relpath = "";
 441
 442                 if (!(ci = commitinfo_getbyoid(&id)))
 443                         break;
 444
 445                 fputs("<tr><td>", fp);
 446                 if (ci->author)
 447                         printtimeshort(fp, &(ci->author->when));
 448                 fputs("</td><td>", fp);
 449                 if (ci->summary) {
 450                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 451                         if ((len = strlen(ci->summary)) > summarylen) {
 452                                 xmlencode(fp, ci->summary, summarylen - 1);
 453                                 fputs("…", fp);
 454                         } else {
 455                                 xmlencode(fp, ci->summary, len);
 456                         }
 457                         fputs("</a>", fp);
 458                 }
 459                 fputs("</td><td>", fp);
 460                 if (ci->author)
 461                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 462                 fputs("</td><td class=\"num\">", fp);
 463                 fprintf(fp, "%zu", ci->filecount);
 464                 fputs("</td><td class=\"num\">", fp);
 465                 fprintf(fp, "+%zu", ci->addcount);
 466                 fputs("</td><td class=\"num\">", fp);
 467                 fprintf(fp, "-%zu", ci->delcount);
 468                 fputs("</td></tr>\n", fp);
 469
 470                 relpath = "../";
 471
 472                 snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 473                 /* check if file exists if so skip it */
 474                 if (access(path, F_OK)) {
 475                         fpfile = efopen(path, "w");
 476                         writeheader(fpfile);
 477                         fputs("<pre>", fpfile);
 478                         printshowfile(fpfile, ci);
 479                         fputs("</pre>\n", fpfile);
 480                         writefooter(fpfile);
 481                         fclose(fpfile);
 482                 }
 483                 commitinfo_free(ci);
 484         }
 485         fputs("</tbody></table>", fp);
 486
 487         git_revwalk_free(w);
 488
 489         relpath = "";
 490
 491         return 0;
 492 }
 493
 494 void
 495 printcommitatom(FILE *fp, struct commitinfo *ci)
 496 {
 497         fputs("<entry>\n", fp);
 498
 499         fprintf(fp, "<id>%s</id>\n", ci->oid);
 500         if (ci->author) {
 501                 fputs("<updated>", fp);
 502                 printtimez(fp, &(ci->author->when));
 503                 fputs("</updated>\n", fp);
 504         }
 505         if (ci->summary) {
 506                 fputs("<title type=\"text\">", fp);
 507                 xmlencode(fp, ci->summary, strlen(ci->summary));
 508                 fputs("</title>\n", fp);
 509         }
 510
 511         fputs("<content type=\"text\">", fp);
 512         fprintf(fp, "commit %s\n", ci->oid);
 513         if (ci->parentoid[0])
 514                 fprintf(fp, "parent %s\n", ci->parentoid);
 515         if (ci->author) {
 516                 fputs("Author: ", fp);
 517                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 518                 fputs(" &lt;", fp);
 519                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 520                 fputs("&gt;\nDate:   ", fp);
 521                 printtime(fp, &(ci->author->when));
 522                 fputc('\n', fp);
 523         }
 524         if (ci->msg) {
 525                 fputc('\n', fp);
 526                 xmlencode(fp, ci->msg, strlen(ci->msg));
 527         }
 528         fputs("\n</content>\n", fp);
 529         if (ci->author) {
 530                 fputs("<author><name>", fp);
 531                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 532                 fputs("</name>\n<email>", fp);
 533                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 534                 fputs("</email>\n</author>\n", fp);
 535         }
 536         fputs("</entry>\n", fp);
 537 }
 538
 539 int
 540 writeatom(FILE *fp)
 541 {
 542         struct commitinfo *ci;
 543         git_revwalk *w = NULL;
 544         git_oid id;
 545         size_t i, m = 100; /* max */
 546
 547         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 548               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 549         xmlencode(fp, stripped_name, strlen(stripped_name));
 550         fputs(", branch HEAD</title>\n<subtitle>", fp);
 551         xmlencode(fp, description, strlen(description));
 552         fputs("</subtitle>\n", fp);
 553
 554         git_revwalk_new(&w, repo);
 555         git_revwalk_push_head(w);
 556         git_revwalk_sorting(w, GIT_SORT_TIME);
 557         git_revwalk_simplify_first_parent(w);
 558
 559         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 560                 if (!(ci = commitinfo_getbyoid(&id)))
 561                         break;
 562                 printcommitatom(fp, ci);
 563                 commitinfo_free(ci);
 564         }
 565         git_revwalk_free(w);
 566
 567         fputs("</feed>", fp);
 568
 569         return 0;
 570 }
 571
 572 int
 573 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 574 {
 575         char tmp[PATH_MAX] = "";
 576         char *d;
 577         const char *p;
 578         int lc = 0;
 579         FILE *fp;
 580
 581         d = xdirname(fpath);
 582         if (mkdirp(d)) {
 583                 free(d);
 584                 return -1;
 585         }
 586         free(d);
 587
 588         p = fpath;
 589         while (*p) {
 590                 if (*p == '/')
 591                         strlcat(tmp, "../", sizeof(tmp));
 592                 p++;
 593         }
 594         relpath = tmp;
 595
 596         fp = efopen(fpath, "w");
 597         writeheader(fp);
 598         fputs("<p> ", fp);
 599         xmlencode(fp, filename, strlen(filename));
 600         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 601         fputs("</p><hr/>", fp);
 602
 603         if (git_blob_is_binary((git_blob *)obj)) {
 604                 fputs("<p>Binary file</p>\n", fp);
 605         } else {
 606                 lc = writeblobhtml(fp, (git_blob *)obj);
 607                 if (ferror(fp))
 608                         err(1, "fwrite");
 609         }
 610         writefooter(fp);
 611         fclose(fp);
 612
 613         relpath = "";
 614
 615         return lc;
 616 }
 617
 618 const char *
 619 filemode(git_filemode_t m)
 620 {
 621         static char mode[11];
 622
 623         memset(mode, '-', sizeof(mode) - 1);
 624         mode[10] = '\0';
 625
 626         if (S_ISREG(m))
 627                 mode[0] = '-';
 628         else if (S_ISBLK(m))
 629                 mode[0] = 'b';
 630         else if (S_ISCHR(m))
 631                 mode[0] = 'c';
 632         else if (S_ISDIR(m))
 633                 mode[0] = 'd';
 634         else if (S_ISFIFO(m))
 635                 mode[0] = 'p';
 636         else if (S_ISLNK(m))
 637                 mode[0] = 'l';
 638         else if (S_ISSOCK(m))
 639                 mode[0] = 's';
 640         else
 641                 mode[0] = '?';
 642
 643         if (m & S_IRUSR) mode[1] = 'r';
 644         if (m & S_IWUSR) mode[2] = 'w';
 645         if (m & S_IXUSR) mode[3] = 'x';
 646         if (m & S_IRGRP) mode[4] = 'r';
 647         if (m & S_IWGRP) mode[5] = 'w';
 648         if (m & S_IXGRP) mode[6] = 'x';
 649         if (m & S_IROTH) mode[7] = 'r';
 650         if (m & S_IWOTH) mode[8] = 'w';
 651         if (m & S_IXOTH) mode[9] = 'x';
 652
 653         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 654         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 655         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 656
 657         return mode;
 658 }
 659
 660 int
 661 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 662 {
 663         const git_tree_entry *entry = NULL;
 664         const char *entryname;
 665         char filepath[PATH_MAX], entrypath[PATH_MAX];
 666         git_object *obj = NULL;
 667         git_off_t filesize;
 668         size_t count, i;
 669         int lc, ret;
 670
 671         count = git_tree_entrycount(tree);
 672         for (i = 0; i < count; i++) {
 673                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 674                     git_tree_entry_to_object(&obj, repo, entry))
 675                         return -1;
 676                 entryname = git_tree_entry_name(entry);
 677                 snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 678                          path, path[0] ? "/" : "", entryname);
 679                 switch (git_object_type(obj)) {
 680                 case GIT_OBJ_BLOB:
 681                         break;
 682                 case GIT_OBJ_TREE:
 683                         /* NOTE: recurses */
 684                         ret = writefilestree(fp, (git_tree *)obj, branch,
 685                                              entrypath);
 686                         git_object_free(obj);
 687                         if (ret)
 688                                 return ret;
 689                         continue;
 690                 default:
 691                         git_object_free(obj);
 692                         continue;
 693                 }
 694                 if (path[0])
 695                         snprintf(filepath, sizeof(filepath), "file/%s/%s.html",
 696                                  path, entryname);
 697                 else
 698                         snprintf(filepath, sizeof(filepath), "file/%s.html",
 699                                  entryname);
 700                 filesize = git_blob_rawsize((git_blob *)obj);
 701
 702                 lc = writeblob(obj, filepath, entryname, filesize);
 703
 704                 fputs("<tr><td>", fp);
 705                 fputs(filemode(git_tree_entry_filemode(entry)), fp);
 706                 fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 707                 xmlencode(fp, entrypath, strlen(entrypath));
 708                 fputs("</a></td><td class=\"num\">", fp);
 709                 if (showlinecount && lc > 0)
 710                         fprintf(fp, "%dL", lc);
 711                 else
 712                         fprintf(fp, "%juB", (uintmax_t)filesize);
 713                 fputs("</td></tr>\n", fp);
 714         }
 715
 716         return 0;
 717 }
 718
 719 int
 720 writefiles(FILE *fp, const git_oid *id, const char *branch)
 721 {
 722         git_tree *tree = NULL;
 723         git_commit *commit = NULL;
 724         int ret = -1;
 725
 726         fputs("<table id=\"files\"><thead>\n<tr>"
 727               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 728               "</tr>\n</thead><tbody>\n", fp);
 729
 730         if (git_commit_lookup(&commit, repo, id) ||
 731             git_commit_tree(&tree, commit))
 732                 goto err;
 733         ret = writefilestree(fp, tree, branch, "");
 734
 735 err:
 736         fputs("</tbody></table>", fp);
 737
 738         git_commit_free(commit);
 739         git_tree_free(tree);
 740
 741         return ret;
 742 }
 743
 744 int
 745 refs_cmp(const void *v1, const void *v2)
 746 {
 747         git_reference *r1 = (*(git_reference **)v1);
 748         git_reference *r2 = (*(git_reference **)v2);
 749         int t1, t2;
 750
 751         t1 = git_reference_is_branch(r1);
 752         t2 = git_reference_is_branch(r2);
 753
 754         if (t1 != t2)
 755                 return t1 - t2;
 756
 757         return strcmp(git_reference_shorthand(r1),
 758                       git_reference_shorthand(r2));
 759 }
 760
 761 int
 762 writerefs(FILE *fp)
 763 {
 764         struct commitinfo *ci;
 765         const git_oid *id = NULL;
 766         git_object *obj = NULL;
 767         git_reference *dref = NULL, *r, *ref = NULL;
 768         git_reference_iterator *it = NULL;
 769         git_reference **refs = NULL;
 770         size_t count, i, j, refcount = 0;
 771         const char *titles[] = { "Branches", "Tags" };
 772         const char *ids[] = { "branches", "tags" };
 773         const char *name;
 774
 775         if (git_reference_iterator_new(&it, repo))
 776                 return -1;
 777
 778         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 779                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 780                         err(1, "realloc");
 781                 refs[refcount] = ref;
 782         }
 783         git_reference_iterator_free(it);
 784
 785         /* sort by type then shorthand name */
 786         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 787
 788         for (j = 0; j < 2; j++) {
 789                 for (i = 0, count = 0; i < refcount; i++) {
 790                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 791                             !(git_reference_is_tag(refs[i]) && j == 1))
 792                                 continue;
 793
 794                         switch (git_reference_type(refs[i])) {
 795                         case GIT_REF_SYMBOLIC:
 796                                 if (git_reference_resolve(&dref, refs[i]))
 797                                         goto err;
 798                                 r = dref;
 799                                 break;
 800                         case GIT_REF_OID:
 801                                 r = refs[i];
 802                                 break;
 803                         default:
 804                                 continue;
 805                         }
 806                         if (!(id = git_reference_target(r)))
 807                                 goto err;
 808                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 809                                 goto err;
 810                         if (!(id = git_object_id(obj)))
 811                                 goto err;
 812                         if (!(ci = commitinfo_getbyoid(id)))
 813                                 break;
 814
 815                         /* print header if it has an entry (first). */
 816                         if (++count == 1) {
 817                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 818                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 819                                       titles[j], ids[j]);
 820                         }
 821
 822                         relpath = "";
 823                         name = git_reference_shorthand(r);
 824
 825                         fputs("<tr><td>", fp);
 826                         xmlencode(fp, name, strlen(name));
 827                         fputs("</td><td>", fp);
 828                         if (ci->author)
 829                                 printtimeshort(fp, &(ci->author->when));
 830                         fputs("</td><td>", fp);
 831                         if (ci->author)
 832                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 833                         fputs("</td></tr>\n", fp);
 834
 835                         relpath = "../";
 836
 837                         commitinfo_free(ci);
 838                         git_object_free(obj);
 839                         obj = NULL;
 840                         git_reference_free(dref);
 841                         dref = NULL;
 842                 }
 843                 /* table footer */
 844                 if (count)
 845                         fputs("</tbody></table><br/>", fp);
 846         }
 847
 848 err:
 849         git_object_free(obj);
 850         git_reference_free(dref);
 851
 852         for (i = 0; i < refcount; i++)
 853                 git_reference_free(refs[i]);
 854         free(refs);
 855
 856         return 0;
 857 }
 858
 859 int
 860 main(int argc, char *argv[])
 861 {
 862         git_object *obj = NULL;
 863         const git_oid *head = NULL;
 864         const git_error *e = NULL;
 865         FILE *fp, *fpread;
 866         char path[PATH_MAX], *p;
 867         int status;
 868
 869         if (argc != 2) {
 870                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 871                 return 1;
 872         }
 873         repodir = argv[1];
 874
 875         git_libgit2_init();
 876
 877         if ((status = git_repository_open_ext(&repo, repodir,
 878                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 879                 e = giterr_last();
 880                 fprintf(stderr, "error %d/%d: %s\n", status, e->klass, e->message);
 881                 return status;
 882         }
 883
 884         /* find HEAD */
 885         if (git_revparse_single(&obj, repo, "HEAD"))
 886                 return 1;
 887         head = git_object_id(obj);
 888         git_object_free(obj);
 889
 890         /* use directory name as name */
 891         name = xbasename(repodir);
 892
 893         /* strip .git suffix */
 894         if (!(stripped_name = strdup(name)))
 895                 err(1, "strdup");
 896         if ((p = strrchr(stripped_name, '.')))
 897                 if (!strcmp(p, ".git"))
 898                         *p = '\0';
 899
 900         /* read description or .git/description */
 901         snprintf(path, sizeof(path), "%s%s%s",
 902                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 903         if (!(fpread = fopen(path, "r"))) {
 904                 snprintf(path, sizeof(path), "%s%s%s",
 905                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 906                 fpread = fopen(path, "r");
 907         }
 908         if (fpread) {
 909                 if (!fgets(description, sizeof(description), fpread))
 910                         description[0] = '\0';
 911                 fclose(fpread);
 912         }
 913
 914         /* read url or .git/url */
 915         snprintf(path, sizeof(path), "%s%s%s",
 916                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 917         if (!(fpread = fopen(path, "r"))) {
 918                 snprintf(path, sizeof(path), "%s%s%s",
 919                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 920                 fpread = fopen(path, "r");
 921         }
 922         if (fpread) {
 923                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
 924                         cloneurl[0] = '\0';
 925                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
 926                 fclose(fpread);
 927         }
 928
 929         /* check LICENSE */
 930         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
 931         git_object_free(obj);
 932         /* check README */
 933         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
 934         git_object_free(obj);
 935
 936         /* log for HEAD */
 937         fp = efopen("log.html", "w");
 938         relpath = "";
 939         writeheader(fp);
 940         mkdir("commit", 0755);
 941         writelog(fp, head);
 942         writefooter(fp);
 943         fclose(fp);
 944
 945         /* files for HEAD */
 946         fp = efopen("files.html", "w");
 947         writeheader(fp);
 948         writefiles(fp, head, "HEAD");
 949         writefooter(fp);
 950         fclose(fp);
 951
 952         /* summary page with branches and tags */
 953         fp = efopen("refs.html", "w");
 954         writeheader(fp);
 955         writerefs(fp);
 956         writefooter(fp);
 957         fclose(fp);
 958
 959         /* Atom feed */
 960         fp = efopen("atom.xml", "w");
 961         writeatom(fp);
 962         fclose(fp);
 963
 964         /* cleanup */
 965         git_repository_free(repo);
 966         git_libgit2_shutdown();
 967
 968         return 0;
 969 }