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, "basename");
 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/branches</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 void
 286 writeblobhtml(FILE *fp, const git_blob *blob)
 287 {
 288         off_t i;
 289         size_t n = 1;
 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                 fprintf(fp, nfmt, n, n, n);
 298                 for (i = 0; i < len - 1; i++) {
 299                         if (s[i] == '\n') {
 300                                 n++;
 301                                 fprintf(fp, nfmt, n, n, n);
 302                         }
 303                 }
 304         }
 305
 306         fputs("</pre></td><td><pre>\n", fp);
 307         xmlencode(fp, s, (size_t)len);
 308         fputs("</pre></td></tr></table>\n", fp);
 309 }
 310
 311 void
 312 printcommit(FILE *fp, struct commitinfo *ci)
 313 {
 314         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 315                 relpath, ci->oid, ci->oid);
 316
 317         if (ci->parentoid[0])
 318                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 319                         relpath, ci->parentoid, ci->parentoid);
 320
 321         if (ci->author) {
 322                 fputs("<b>Author:</b> ", fp);
 323                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 324                 fputs(" &lt;<a href=\"mailto:", fp);
 325                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 326                 fputs("\">", fp);
 327                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 328                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 329                 printtime(fp, &(ci->author->when));
 330                 fputc('\n', fp);
 331         }
 332         fputc('\n', fp);
 333
 334         if (ci->msg)
 335                 xmlencode(fp, ci->msg, strlen(ci->msg));
 336
 337         fputc('\n', fp);
 338 }
 339
 340 void
 341 printshowfile(struct commitinfo *ci)
 342 {
 343         const git_diff_delta *delta;
 344         const git_diff_hunk *hunk;
 345         const git_diff_line *line;
 346         git_patch *patch;
 347         git_buf statsbuf;
 348         size_t ndeltas, nhunks, nhunklines;
 349         FILE *fp;
 350         size_t i, j, k;
 351         char path[PATH_MAX];
 352
 353         snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 354         /* check if file exists if so skip it */
 355         if (!access(path, F_OK))
 356                 return;
 357
 358         fp = efopen(path, "w");
 359         writeheader(fp);
 360         fputs("<pre>\n", fp);
 361         printcommit(fp, ci);
 362
 363         memset(&statsbuf, 0, sizeof(statsbuf));
 364
 365         /* diff stat */
 366         if (ci->stats) {
 367                 if (!git_diff_stats_to_buf(&statsbuf, ci->stats,
 368                     GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) {
 369                         if (statsbuf.ptr && statsbuf.ptr[0]) {
 370                                 fputs("<b>Diffstat:</b>\n", fp);
 371                                 fputs(statsbuf.ptr, fp);
 372                         }
 373                 }
 374         }
 375
 376         fputs("<hr/>", fp);
 377
 378         ndeltas = git_diff_num_deltas(ci->diff);
 379         for (i = 0; i < ndeltas; i++) {
 380                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 381                         git_patch_free(patch);
 382                         break;
 383                 }
 384
 385                 delta = git_patch_get_delta(patch);
 386                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 387                         relpath, delta->old_file.path, delta->old_file.path,
 388                         relpath, delta->new_file.path, delta->new_file.path);
 389
 390                 /* check binary data */
 391                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 392                         fputs("Binary files differ\n", fp);
 393                         git_patch_free(patch);
 394                         continue;
 395                 }
 396
 397                 nhunks = git_patch_num_hunks(patch);
 398                 for (j = 0; j < nhunks; j++) {
 399                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 400                                 break;
 401
 402                         fprintf(fp, "<a href=\"#h%zu\" id=\"h%zu\" class=\"h\">", j, j);
 403                         xmlencode(fp, hunk->header, hunk->header_len);
 404                         fputs("</a>", fp);
 405
 406                         for (k = 0; ; k++) {
 407                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 408                                         break;
 409                                 if (line->old_lineno == -1)
 410                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"i\">+",
 411                                                 j, k, j, k);
 412                                 else if (line->new_lineno == -1)
 413                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"d\">-",
 414                                                 j, k, j, k);
 415                                 else
 416                                         fputc(' ', fp);
 417                                 xmlencode(fp, line->content, line->content_len);
 418                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 419                                         fputs("</a>", fp);
 420                         }
 421                 }
 422                 git_patch_free(patch);
 423         }
 424         git_buf_free(&statsbuf);
 425
 426         fputs("</pre>\n", fp);
 427         writefooter(fp);
 428         fclose(fp);
 429         return;
 430 }
 431
 432 int
 433 writelog(FILE *fp, const char *branch)
 434 {
 435         struct commitinfo *ci;
 436         const git_oid *oid;
 437         git_revwalk *w = NULL;
 438         git_object *obj = NULL;
 439         git_oid id;
 440         size_t len;
 441
 442         mkdir("commit", 0755);
 443
 444         if (git_revparse_single(&obj, repo, branch))
 445                 return -1;
 446         oid = git_object_id(obj);
 447
 448         git_revwalk_new(&w, repo);
 449         git_revwalk_push(w, oid);
 450         git_revwalk_sorting(w, GIT_SORT_TIME);
 451         git_revwalk_simplify_first_parent(w);
 452
 453         fputs("<table id=\"log\"><thead>\n<tr><td>Age</td><td>Commit message</td>"
 454                   "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 455                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 456
 457         while (!git_revwalk_next(&id, w)) {
 458                 relpath = "";
 459
 460                 if (!(ci = commitinfo_getbyoid(&id)))
 461                         break;
 462
 463                 fputs("<tr><td>", fp);
 464                 if (ci->author)
 465                         printtimeshort(fp, &(ci->author->when));
 466                 fputs("</td><td>", fp);
 467                 if (ci->summary) {
 468                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 469                         if ((len = strlen(ci->summary)) > summarylen) {
 470                                 xmlencode(fp, ci->summary, summarylen - 1);
 471                                 fputs("…", fp);
 472                         } else {
 473                                 xmlencode(fp, ci->summary, len);
 474                         }
 475                         fputs("</a>", fp);
 476                 }
 477                 fputs("</td><td>", fp);
 478                 if (ci->author)
 479                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 480                 fputs("</td><td class=\"num\">", fp);
 481                 fprintf(fp, "%zu", ci->filecount);
 482                 fputs("</td><td class=\"num\">", fp);
 483                 fprintf(fp, "+%zu", ci->addcount);
 484                 fputs("</td><td class=\"num\">", fp);
 485                 fprintf(fp, "-%zu", ci->delcount);
 486                 fputs("</td></tr>\n", fp);
 487
 488                 relpath = "../";
 489                 printshowfile(ci);
 490
 491                 commitinfo_free(ci);
 492         }
 493         fputs("</tbody></table>", fp);
 494
 495         git_revwalk_free(w);
 496         git_object_free(obj);
 497
 498         relpath = "";
 499
 500         return 0;
 501 }
 502
 503 void
 504 printcommitatom(FILE *fp, struct commitinfo *ci)
 505 {
 506         fputs("<entry>\n", fp);
 507
 508         fprintf(fp, "<id>%s</id>\n", ci->oid);
 509         if (ci->author) {
 510                 fputs("<updated>", fp);
 511                 printtimez(fp, &(ci->author->when));
 512                 fputs("</updated>\n", fp);
 513         }
 514         if (ci->summary) {
 515                 fputs("<title type=\"text\">", fp);
 516                 xmlencode(fp, ci->summary, strlen(ci->summary));
 517                 fputs("</title>\n", fp);
 518         }
 519
 520         fputs("<content type=\"text\">", fp);
 521         fprintf(fp, "commit %s\n", ci->oid);
 522         if (ci->parentoid[0])
 523                 fprintf(fp, "parent %s\n", ci->parentoid);
 524         if (ci->author) {
 525                 fputs("Author: ", fp);
 526                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 527                 fputs(" &lt;", fp);
 528                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 529                 fputs("&gt;\nDate:   ", fp);
 530                 printtime(fp, &(ci->author->when));
 531                 fputc('\n', fp);
 532         }
 533         if (ci->msg) {
 534                 fputc('\n', fp);
 535                 xmlencode(fp, ci->msg, strlen(ci->msg));
 536         }
 537         fputs("\n</content>\n", fp);
 538         if (ci->author) {
 539                 fputs("<author><name>", fp);
 540                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 541                 fputs("</name>\n<email>", fp);
 542                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 543                 fputs("</email>\n</author>\n", fp);
 544         }
 545         fputs("</entry>\n", fp);
 546 }
 547
 548 int
 549 writeatom(FILE *fp)
 550 {
 551         struct commitinfo *ci;
 552         git_revwalk *w = NULL;
 553         git_oid id;
 554         size_t i, m = 100; /* max */
 555
 556         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 557               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 558         xmlencode(fp, stripped_name, strlen(stripped_name));
 559         fputs(", branch HEAD</title>\n<subtitle>", fp);
 560         xmlencode(fp, description, strlen(description));
 561         fputs("</subtitle>\n", fp);
 562
 563         git_revwalk_new(&w, repo);
 564         git_revwalk_push_head(w);
 565         git_revwalk_sorting(w, GIT_SORT_TIME);
 566         git_revwalk_simplify_first_parent(w);
 567
 568         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 569                 if (!(ci = commitinfo_getbyoid(&id)))
 570                         break;
 571                 printcommitatom(fp, ci);
 572                 commitinfo_free(ci);
 573         }
 574         git_revwalk_free(w);
 575
 576         fputs("</feed>", fp);
 577
 578         return 0;
 579 }
 580
 581 int
 582 writeblob(git_object *obj, const char *filename, git_off_t filesize)
 583 {
 584         char fpath[PATH_MAX];
 585         char tmp[PATH_MAX] = "";
 586         char *d, *p;
 587         FILE *fp;
 588
 589         snprintf(fpath, sizeof(fpath), "file/%s.html", filename);
 590         d = xdirname(fpath);
 591         if (mkdirp(d)) {
 592                 free(d);
 593                 return 1;
 594         }
 595         free(d);
 596
 597         p = fpath;
 598         while (*p) {
 599                 if (*p == '/')
 600                         strlcat(tmp, "../", sizeof(tmp));
 601                 p++;
 602         }
 603         relpath = tmp;
 604
 605         fp = efopen(fpath, "w");
 606         writeheader(fp);
 607         fputs("<p> ", fp);
 608         xmlencode(fp, filename, strlen(filename));
 609         fprintf(fp, " (%jub)", (uintmax_t)filesize);
 610         fputs("</p><hr/>", fp);
 611
 612         if (git_blob_is_binary((git_blob *)obj)) {
 613                 fputs("<p>Binary file</p>\n", fp);
 614         } else {
 615                 writeblobhtml(fp, (git_blob *)obj);
 616                 if (ferror(fp))
 617                         err(1, "fwrite");
 618         }
 619         writefooter(fp);
 620         fclose(fp);
 621
 622         relpath = "";
 623
 624         return 0;
 625 }
 626
 627 const char *
 628 filemode(git_filemode_t m)
 629 {
 630         static char mode[11];
 631
 632         memset(mode, '-', sizeof(mode) - 1);
 633         mode[10] = '\0';
 634
 635         if (S_ISREG(m))
 636                 mode[0] = '-';
 637         else if (S_ISBLK(m))
 638                 mode[0] = 'b';
 639         else if (S_ISCHR(m))
 640                 mode[0] = 'c';
 641         else if (S_ISDIR(m))
 642                 mode[0] = 'd';
 643         else if (S_ISFIFO(m))
 644                 mode[0] = 'p';
 645         else if (S_ISLNK(m))
 646                 mode[0] = 'l';
 647         else if (S_ISSOCK(m))
 648                 mode[0] = 's';
 649         else
 650                 mode[0] = '?';
 651
 652         if (m & S_IRUSR) mode[1] = 'r';
 653         if (m & S_IWUSR) mode[2] = 'w';
 654         if (m & S_IXUSR) mode[3] = 'x';
 655         if (m & S_IRGRP) mode[4] = 'r';
 656         if (m & S_IWGRP) mode[5] = 'w';
 657         if (m & S_IXGRP) mode[6] = 'x';
 658         if (m & S_IROTH) mode[7] = 'r';
 659         if (m & S_IWOTH) mode[8] = 'w';
 660         if (m & S_IXOTH) mode[9] = 'x';
 661
 662         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 663         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 664         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 665
 666         return mode;
 667 }
 668
 669 int
 670 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 671 {
 672         const git_tree_entry *entry = NULL;
 673         const char *filename;
 674         char filepath[PATH_MAX];
 675         git_object *obj = NULL;
 676         git_off_t filesize;
 677         size_t count, i;
 678         int ret;
 679
 680         count = git_tree_entrycount(tree);
 681         for (i = 0; i < count; i++) {
 682                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 683                     git_tree_entry_to_object(&obj, repo, entry))
 684                         return -1;
 685                 filename = git_tree_entry_name(entry);
 686                 switch (git_object_type(obj)) {
 687                 case GIT_OBJ_BLOB:
 688                         break;
 689                 case GIT_OBJ_TREE:
 690                         /* NOTE: recurses */
 691                         ret = writefilestree(fp, (git_tree *)obj, branch,
 692                                              filename);
 693                         git_object_free(obj);
 694                         if (ret)
 695                                 return ret;
 696                         continue;
 697                 default:
 698                         git_object_free(obj);
 699                         continue;
 700                 }
 701                 if (path[0]) {
 702                         snprintf(filepath, sizeof(filepath), "%s/%s",
 703                                  path, filename);
 704                         filename = filepath;
 705                 }
 706                 filesize = git_blob_rawsize((git_blob *)obj);
 707
 708                 fputs("<tr><td>", fp);
 709                 fprintf(fp, "%s", filemode(git_tree_entry_filemode(entry)));
 710                 fprintf(fp, "</td><td><a href=\"%sfile/", relpath);
 711                 xmlencode(fp, filename, strlen(filename));
 712                 fputs(".html\">", fp);
 713                 xmlencode(fp, filename, strlen(filename));
 714                 fputs("</a></td><td class=\"num\">", fp);
 715                 fprintf(fp, "%ju", (uintmax_t)filesize);
 716                 fputs("</td></tr>\n", fp);
 717
 718                 writeblob(obj, filename, filesize);
 719         }
 720
 721         return 0;
 722 }
 723
 724 int
 725 writefiles(FILE *fp, const char *branch)
 726 {
 727         const git_oid *id;
 728         git_tree *tree = NULL;
 729         git_object *obj = NULL;
 730         git_commit *commit = NULL;
 731         int ret = -1;
 732
 733         fputs("<table id=\"files\"><thead>\n<tr>"
 734               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 735               "</tr>\n</thead><tbody>\n", fp);
 736
 737         if (git_revparse_single(&obj, repo, branch))
 738                 goto err;
 739         id = git_object_id(obj);
 740         if (git_commit_lookup(&commit, repo, id) ||
 741             git_commit_tree(&tree, commit))
 742                 goto err;
 743         ret = writefilestree(fp, tree, branch, "");
 744
 745 err:
 746         fputs("</tbody></table>", fp);
 747
 748         git_object_free(obj);
 749         git_commit_free(commit);
 750         git_tree_free(tree);
 751
 752         return ret;
 753 }
 754
 755 int
 756 refs_cmp(const void *v1, const void *v2)
 757 {
 758         git_reference *r1 = (*(git_reference **)v1);
 759         git_reference *r2 = (*(git_reference **)v2);
 760         int t1, t2;
 761
 762         t1 = git_reference_is_branch(r1);
 763         t2 = git_reference_is_branch(r2);
 764
 765         if (t1 != t2)
 766                 return t1 - t2;
 767
 768         return strcmp(git_reference_shorthand(r1),
 769                       git_reference_shorthand(r2));
 770 }
 771
 772 int
 773 writerefs(FILE *fp)
 774 {
 775         struct commitinfo *ci;
 776         const git_oid *id = NULL;
 777         git_object *obj = NULL;
 778         git_reference *dref = NULL, *r, *ref = NULL;
 779         git_reference_iterator *it = NULL;
 780         git_reference **refs = NULL;
 781         size_t count, i, j, len, refcount = 0;
 782         const char *cols[] = { "Branch", "Tag" }; /* first column title */
 783         const char *titles[] = { "Branches", "Tags" };
 784         const char *ids[] = { "branches", "tags" };
 785         const char *name;
 786
 787         if (git_reference_iterator_new(&it, repo))
 788                 return -1;
 789
 790         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 791                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 792                         err(1, "realloc");
 793                 refs[refcount] = ref;
 794         }
 795         git_reference_iterator_free(it);
 796
 797         /* sort by type then shorthand name */
 798         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 799
 800         for (j = 0; j < 2; j++) {
 801                 for (i = 0, count = 0; i < refcount; i++) {
 802                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 803                             !(git_reference_is_tag(refs[i]) && j == 1))
 804                                 continue;
 805
 806                         switch (git_reference_type(refs[i])) {
 807                         case GIT_REF_SYMBOLIC:
 808                                 if (git_reference_resolve(&dref, refs[i]))
 809                                         goto err;
 810                                 r = dref;
 811                                 break;
 812                         case GIT_REF_OID:
 813                                 r = refs[i];
 814                                 break;
 815                         default:
 816                                 continue;
 817                         }
 818                         if (!(id = git_reference_target(r)))
 819                                 goto err;
 820                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 821                                 goto err;
 822                         if (!(id = git_object_id(obj)))
 823                                 goto err;
 824                         if (!(ci = commitinfo_getbyoid(id)))
 825                                 break;
 826
 827                         /* print header if it has an entry (first). */
 828                         if (++count == 1) {
 829                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>%s</td>"
 830                                       "<td>Age</td><td>Commit message</td>"
 831                                       "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 832                                       "<td class=\"num\">-</td></tr>\n</thead><tbody>\n",
 833                                       titles[j], ids[j], cols[j]);
 834                         }
 835
 836                         relpath = "";
 837                         name = git_reference_shorthand(r);
 838
 839                         fputs("<tr><td>", fp);
 840                         xmlencode(fp, name, strlen(name));
 841                         fputs("</td><td>", fp);
 842                         if (ci->author)
 843                                 printtimeshort(fp, &(ci->author->when));
 844                         fputs("</td><td>", fp);
 845                         if (ci->summary) {
 846                                 if (j)
 847                                         fprintf(fp, "<a href=\"%scommit/%s.html\">",
 848                                                 relpath, ci->oid);
 849                                 if ((len = strlen(ci->summary)) > summarylen) {
 850                                         xmlencode(fp, ci->summary, summarylen - 1);
 851                                         fputs("…", fp);
 852                                 } else {
 853                                         xmlencode(fp, ci->summary, len);
 854                                 }
 855                                 if (j)
 856                                         fputs("</a>", fp);
 857                         }
 858                         fputs("</td><td>", fp);
 859                         if (ci->author)
 860                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 861                         fputs("</td><td class=\"num\">", fp);
 862                         fprintf(fp, "%zu", ci->filecount);
 863                         fputs("</td><td class=\"num\">", fp);
 864                         fprintf(fp, "+%zu", ci->addcount);
 865                         fputs("</td><td class=\"num\">", fp);
 866                         fprintf(fp, "-%zu", ci->delcount);
 867                         fputs("</td></tr>\n", fp);
 868
 869                         relpath = "../";
 870
 871                         commitinfo_free(ci);
 872                         git_object_free(obj);
 873                         obj = NULL;
 874                         git_reference_free(dref);
 875                         dref = NULL;
 876                 }
 877                 /* table footer */
 878                 if (count)
 879                         fputs("</tbody></table>", fp);
 880         }
 881
 882 err:
 883         git_object_free(obj);
 884         git_reference_free(dref);
 885
 886         for (i = 0; i < refcount; i++)
 887                 git_reference_free(refs[i]);
 888         free(refs);
 889
 890         return 0;
 891 }
 892
 893 int
 894 main(int argc, char *argv[])
 895 {
 896         git_object *obj = NULL;
 897         const git_error *e = NULL;
 898         FILE *fp, *fpread;
 899         char path[PATH_MAX], *p;
 900         int status;
 901
 902         if (argc != 2) {
 903                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 904                 return 1;
 905         }
 906         repodir = argv[1];
 907
 908         git_libgit2_init();
 909
 910         if ((status = git_repository_open_ext(&repo, repodir,
 911                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 912                 e = giterr_last();
 913                 fprintf(stderr, "error %d/%d: %s\n", status, e->klass, e->message);
 914                 return status;
 915         }
 916
 917         /* use directory name as name */
 918         name = xbasename(repodir);
 919
 920         /* strip .git suffix */
 921         if (!(stripped_name = strdup(name)))
 922                 err(1, "strdup");
 923         if ((p = strrchr(stripped_name, '.')))
 924                 if (!strcmp(p, ".git"))
 925                         *p = '\0';
 926
 927         /* read description or .git/description */
 928         snprintf(path, sizeof(path), "%s%s%s",
 929                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 930         if (!(fpread = fopen(path, "r"))) {
 931                 snprintf(path, sizeof(path), "%s%s%s",
 932                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 933                 fpread = fopen(path, "r");
 934         }
 935         if (fpread) {
 936                 if (!fgets(description, sizeof(description), fpread))
 937                         description[0] = '\0';
 938                 fclose(fpread);
 939         }
 940
 941         /* read url or .git/url */
 942         snprintf(path, sizeof(path), "%s%s%s",
 943                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 944         if (!(fpread = fopen(path, "r"))) {
 945                 snprintf(path, sizeof(path), "%s%s%s",
 946                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 947                 fpread = fopen(path, "r");
 948         }
 949         if (fpread) {
 950                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
 951                         cloneurl[0] = '\0';
 952                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
 953                 fclose(fpread);
 954         }
 955
 956         /* check LICENSE */
 957         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
 958         git_object_free(obj);
 959         /* check README */
 960         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
 961         git_object_free(obj);
 962
 963         /* log for HEAD */
 964         fp = efopen("log.html", "w");
 965         relpath = "";
 966         writeheader(fp);
 967         writelog(fp, "HEAD");
 968         writefooter(fp);
 969         fclose(fp);
 970
 971         /* files for HEAD */
 972         fp = efopen("files.html", "w");
 973         writeheader(fp);
 974         writefiles(fp, "HEAD");
 975         writefooter(fp);
 976         fclose(fp);
 977
 978         /* summary page with branches and tags */
 979         fp = efopen("refs.html", "w");
 980         writeheader(fp);
 981         writerefs(fp);
 982         writefooter(fp);
 983         fclose(fp);
 984
 985         /* Atom feed */
 986         fp = efopen("atom.xml", "w");
 987         writeatom(fp);
 988         fclose(fp);
 989
 990         /* cleanup */
 991         git_repository_free(repo);
 992         git_libgit2_shutdown();
 993
 994         return 0;
 995 }