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         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 192                 errx(1, "path truncated: '%s'", path);
 193         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 194                 if (*p != '/')
 195                         continue;
 196                 *p = '\0';
 197                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 198                         return -1;
 199                 *p = '/';
 200         }
 201         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 202                 return -1;
 203         return 0;
 204 }
 205
 206 void
 207 printtimeformat(FILE *fp, const git_time *intime, const char *fmt)
 208 {
 209         struct tm *intm;
 210         time_t t;
 211         char out[32];
 212
 213         t = (time_t) intime->time + (intime->offset * 60);
 214         intm = gmtime(&t);
 215         strftime(out, sizeof(out), fmt, intm);
 216         fputs(out, fp);
 217 }
 218
 219 void
 220 printtimez(FILE *fp, const git_time *intime)
 221 {
 222         printtimeformat(fp, intime, "%Y-%m-%dT%H:%M:%SZ");
 223 }
 224
 225 void
 226 printtime(FILE *fp, const git_time *intime)
 227 {
 228         printtimeformat(fp, intime, "%a %b %e %T %Y");
 229 }
 230
 231 void
 232 printtimeshort(FILE *fp, const git_time *intime)
 233 {
 234         printtimeformat(fp, intime, "%Y-%m-%d %H:%M");
 235 }
 236
 237 int
 238 writeheader(FILE *fp)
 239 {
 240         fputs("<!DOCTYPE html>\n"
 241                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 242                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 243                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 244         xmlencode(fp, stripped_name, strlen(stripped_name));
 245         if (description[0])
 246                 fputs(" - ", fp);
 247         xmlencode(fp, description, strlen(description));
 248         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 249         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 250                 name, relpath);
 251         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 252         fputs("</head>\n<body>\n<table><tr><td>", fp);
 253         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 254                 relpath, relpath);
 255         fputs("</td><td><h1>", fp);
 256         xmlencode(fp, stripped_name, strlen(stripped_name));
 257         fputs("</h1><span class=\"desc\">", fp);
 258         xmlencode(fp, description, strlen(description));
 259         fputs("</span></td></tr>", fp);
 260         if (cloneurl[0]) {
 261                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 262                 xmlencode(fp, cloneurl, strlen(cloneurl));
 263                 fputs("\">", fp);
 264                 xmlencode(fp, cloneurl, strlen(cloneurl));
 265                 fputs("</a></td></tr>", fp);
 266         }
 267         fputs("<tr><td></td><td>\n", fp);
 268         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 269         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 270         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 271         if (hasreadme)
 272                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 273         if (haslicense)
 274                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 275         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 276
 277         return 0;
 278 }
 279
 280 int
 281 writefooter(FILE *fp)
 282 {
 283         return !fputs("</div>\n</body>\n</html>\n", fp);
 284 }
 285
 286 int
 287 writeblobhtml(FILE *fp, const git_blob *blob)
 288 {
 289         off_t i;
 290         size_t n = 0;
 291         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 292         const char *s = git_blob_rawcontent(blob);
 293         git_off_t len = git_blob_rawsize(blob);
 294
 295         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 296
 297         if (len) {
 298                 n++;
 299                 fprintf(fp, nfmt, n, n, n);
 300                 for (i = 0; i < len - 1; i++) {
 301                         if (s[i] == '\n') {
 302                                 n++;
 303                                 fprintf(fp, nfmt, n, n, n);
 304                         }
 305                 }
 306         }
 307
 308         fputs("</pre></td><td><pre>\n", fp);
 309         xmlencode(fp, s, (size_t)len);
 310         fputs("</pre></td></tr></table>\n", fp);
 311
 312         return n;
 313 }
 314
 315 void
 316 printcommit(FILE *fp, struct commitinfo *ci)
 317 {
 318         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 319                 relpath, ci->oid, ci->oid);
 320
 321         if (ci->parentoid[0])
 322                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 323                         relpath, ci->parentoid, ci->parentoid);
 324
 325         if (ci->author) {
 326                 fputs("<b>Author:</b> ", fp);
 327                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 328                 fputs(" &lt;<a href=\"mailto:", fp);
 329                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 330                 fputs("\">", fp);
 331                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 332                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 333                 printtime(fp, &(ci->author->when));
 334                 fputc('\n', fp);
 335         }
 336         if (ci->msg) {
 337                 fputc('\n', fp);
 338                 xmlencode(fp, ci->msg, strlen(ci->msg));
 339                 fputc('\n', fp);
 340         }
 341 }
 342
 343 void
 344 printshowfile(FILE *fp, struct commitinfo *ci)
 345 {
 346         const git_diff_delta *delta;
 347         const git_diff_hunk *hunk;
 348         const git_diff_line *line;
 349         git_patch *patch;
 350         git_buf statsbuf;
 351         size_t ndeltas, nhunks, nhunklines;
 352         size_t i, j, k;
 353
 354         printcommit(fp, ci);
 355
 356         memset(&statsbuf, 0, sizeof(statsbuf));
 357
 358         /* diff stat */
 359         if (ci->stats &&
 360             !git_diff_stats_to_buf(&statsbuf, ci->stats,
 361                                    GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) {
 362                 if (statsbuf.ptr && statsbuf.ptr[0]) {
 363                         fputs("<b>Diffstat:</b>\n", fp);
 364                         xmlencode(fp, statsbuf.ptr, strlen(statsbuf.ptr));
 365                 }
 366         }
 367
 368         fputs("<hr/>", fp);
 369
 370         ndeltas = git_diff_num_deltas(ci->diff);
 371         for (i = 0; i < ndeltas; i++) {
 372                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 373                         git_patch_free(patch);
 374                         break;
 375                 }
 376
 377                 delta = git_patch_get_delta(patch);
 378                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 379                         relpath, delta->old_file.path, delta->old_file.path,
 380                         relpath, delta->new_file.path, delta->new_file.path);
 381
 382                 /* check binary data */
 383                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 384                         fputs("Binary files differ\n", fp);
 385                         git_patch_free(patch);
 386                         continue;
 387                 }
 388
 389                 nhunks = git_patch_num_hunks(patch);
 390                 for (j = 0; j < nhunks; j++) {
 391                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 392                                 break;
 393
 394                         fprintf(fp, "<a href=\"#h%zu\" id=\"h%zu\" class=\"h\">", j, j);
 395                         xmlencode(fp, hunk->header, hunk->header_len);
 396                         fputs("</a>", fp);
 397
 398                         for (k = 0; ; k++) {
 399                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 400                                         break;
 401                                 if (line->old_lineno == -1)
 402                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"i\">+",
 403                                                 j, k, j, k);
 404                                 else if (line->new_lineno == -1)
 405                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"d\">-",
 406                                                 j, k, j, k);
 407                                 else
 408                                         fputc(' ', fp);
 409                                 xmlencode(fp, line->content, line->content_len);
 410                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 411                                         fputs("</a>", fp);
 412                         }
 413                 }
 414                 git_patch_free(patch);
 415         }
 416         git_buf_free(&statsbuf);
 417
 418         return;
 419 }
 420
 421 int
 422 writelog(FILE *fp, const git_oid *oid)
 423 {
 424         struct commitinfo *ci;
 425         git_revwalk *w = NULL;
 426         git_oid id;
 427         size_t len;
 428         char path[PATH_MAX];
 429         FILE *fpfile;
 430         int r;
 431
 432         git_revwalk_new(&w, repo);
 433         git_revwalk_push(w, oid);
 434         git_revwalk_sorting(w, GIT_SORT_TIME);
 435         git_revwalk_simplify_first_parent(w);
 436
 437         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
 438                   "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 439                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 440
 441         while (!git_revwalk_next(&id, w)) {
 442                 relpath = "";
 443
 444                 if (!(ci = commitinfo_getbyoid(&id)))
 445                         break;
 446
 447                 fputs("<tr><td>", fp);
 448                 if (ci->author)
 449                         printtimeshort(fp, &(ci->author->when));
 450                 fputs("</td><td>", fp);
 451                 if (ci->summary) {
 452                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 453                         if ((len = strlen(ci->summary)) > summarylen) {
 454                                 xmlencode(fp, ci->summary, summarylen - 1);
 455                                 fputs("…", fp);
 456                         } else {
 457                                 xmlencode(fp, ci->summary, len);
 458                         }
 459                         fputs("</a>", fp);
 460                 }
 461                 fputs("</td><td>", fp);
 462                 if (ci->author)
 463                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 464                 fputs("</td><td class=\"num\">", fp);
 465                 fprintf(fp, "%zu", ci->filecount);
 466                 fputs("</td><td class=\"num\">", fp);
 467                 fprintf(fp, "+%zu", ci->addcount);
 468                 fputs("</td><td class=\"num\">", fp);
 469                 fprintf(fp, "-%zu", ci->delcount);
 470                 fputs("</td></tr>\n", fp);
 471
 472                 relpath = "../";
 473
 474                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 475                 if (r == -1 || (size_t)r >= sizeof(path))
 476                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 477
 478                 /* check if file exists if so skip it */
 479                 if (access(path, F_OK)) {
 480                         fpfile = efopen(path, "w");
 481                         writeheader(fpfile);
 482                         fputs("<pre>", fpfile);
 483                         printshowfile(fpfile, ci);
 484                         fputs("</pre>\n", fpfile);
 485                         writefooter(fpfile);
 486                         fclose(fpfile);
 487                 }
 488                 commitinfo_free(ci);
 489         }
 490         fputs("</tbody></table>", fp);
 491
 492         git_revwalk_free(w);
 493
 494         relpath = "";
 495
 496         return 0;
 497 }
 498
 499 void
 500 printcommitatom(FILE *fp, struct commitinfo *ci)
 501 {
 502         fputs("<entry>\n", fp);
 503
 504         fprintf(fp, "<id>%s</id>\n", ci->oid);
 505         if (ci->author) {
 506                 fputs("<updated>", fp);
 507                 printtimez(fp, &(ci->author->when));
 508                 fputs("</updated>\n", fp);
 509         }
 510         if (ci->summary) {
 511                 fputs("<title type=\"text\">", fp);
 512                 xmlencode(fp, ci->summary, strlen(ci->summary));
 513                 fputs("</title>\n", fp);
 514         }
 515         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 516                 ci->oid);
 517
 518         if (ci->author) {
 519                 fputs("<author><name>", fp);
 520                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 521                 fputs("</name>\n<email>", fp);
 522                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 523                 fputs("</email>\n</author>\n", fp);
 524         }
 525
 526         fputs("<content type=\"text\">", fp);
 527         fprintf(fp, "commit %s\n", ci->oid);
 528         if (ci->parentoid[0])
 529                 fprintf(fp, "parent %s\n", ci->parentoid);
 530         if (ci->author) {
 531                 fputs("Author: ", fp);
 532                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 533                 fputs(" &lt;", fp);
 534                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 535                 fputs("&gt;\nDate:   ", fp);
 536                 printtime(fp, &(ci->author->when));
 537                 fputc('\n', fp);
 538         }
 539         if (ci->msg) {
 540                 fputc('\n', fp);
 541                 xmlencode(fp, ci->msg, strlen(ci->msg));
 542         }
 543         fputs("\n</content>\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 *fpath, const char *filename, git_off_t filesize)
 583 {
 584         char tmp[PATH_MAX] = "";
 585         char *d;
 586         const char *p;
 587         int lc = 0;
 588         FILE *fp;
 589
 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 == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 600                         errx(1, "path truncated: '../%s'", 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                 lc = 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 lc;
 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 *entryname;
 674         char filepath[PATH_MAX], entrypath[PATH_MAX];
 675         git_object *obj = NULL;
 676         git_off_t filesize;
 677         size_t count, i;
 678         int lc, r, 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                 entryname = git_tree_entry_name(entry);
 686                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 687                          path, path[0] ? "/" : "", entryname);
 688                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 689                         errx(1, "path truncated: '%s%s%s'",
 690                                 path, path[0] ? "/" : "", entryname);
 691                 switch (git_object_type(obj)) {
 692                 case GIT_OBJ_BLOB:
 693                         break;
 694                 case GIT_OBJ_TREE:
 695                         /* NOTE: recurses */
 696                         ret = writefilestree(fp, (git_tree *)obj, branch,
 697                                              entrypath);
 698                         git_object_free(obj);
 699                         if (ret)
 700                                 return ret;
 701                         continue;
 702                 default:
 703                         git_object_free(obj);
 704                         continue;
 705                 }
 706
 707                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 708                          path, path[0] ? "/" : "", entryname);
 709                 if (r == -1 || (size_t)r >= sizeof(filepath))
 710                         errx(1, "path truncated: 'file/%s%s%s.html'",
 711                                 path, path[0] ? "/" : "", entryname);
 712
 713                 filesize = git_blob_rawsize((git_blob *)obj);
 714
 715                 lc = writeblob(obj, filepath, entryname, filesize);
 716
 717                 fputs("<tr><td>", fp);
 718                 fputs(filemode(git_tree_entry_filemode(entry)), fp);
 719                 fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 720                 xmlencode(fp, entrypath, strlen(entrypath));
 721                 fputs("</a></td><td class=\"num\">", fp);
 722                 if (showlinecount && lc > 0)
 723                         fprintf(fp, "%dL", lc);
 724                 else
 725                         fprintf(fp, "%juB", (uintmax_t)filesize);
 726                 fputs("</td></tr>\n", fp);
 727         }
 728
 729         return 0;
 730 }
 731
 732 int
 733 writefiles(FILE *fp, const git_oid *id, const char *branch)
 734 {
 735         git_tree *tree = NULL;
 736         git_commit *commit = NULL;
 737         int ret = -1;
 738
 739         fputs("<table id=\"files\"><thead>\n<tr>"
 740               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 741               "</tr>\n</thead><tbody>\n", fp);
 742
 743         if (git_commit_lookup(&commit, repo, id) ||
 744             git_commit_tree(&tree, commit))
 745                 goto err;
 746         ret = writefilestree(fp, tree, branch, "");
 747
 748 err:
 749         fputs("</tbody></table>", fp);
 750
 751         git_commit_free(commit);
 752         git_tree_free(tree);
 753
 754         return ret;
 755 }
 756
 757 int
 758 refs_cmp(const void *v1, const void *v2)
 759 {
 760         git_reference *r1 = (*(git_reference **)v1);
 761         git_reference *r2 = (*(git_reference **)v2);
 762         int t1, t2;
 763
 764         t1 = git_reference_is_branch(r1);
 765         t2 = git_reference_is_branch(r2);
 766
 767         if (t1 != t2)
 768                 return t1 - t2;
 769
 770         return strcmp(git_reference_shorthand(r1),
 771                       git_reference_shorthand(r2));
 772 }
 773
 774 int
 775 writerefs(FILE *fp)
 776 {
 777         struct commitinfo *ci;
 778         const git_oid *id = NULL;
 779         git_object *obj = NULL;
 780         git_reference *dref = NULL, *r, *ref = NULL;
 781         git_reference_iterator *it = NULL;
 782         git_reference **refs = NULL;
 783         size_t count, i, j, refcount = 0;
 784         const char *titles[] = { "Branches", "Tags" };
 785         const char *ids[] = { "branches", "tags" };
 786         const char *name;
 787
 788         if (git_reference_iterator_new(&it, repo))
 789                 return -1;
 790
 791         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 792                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 793                         err(1, "realloc");
 794                 refs[refcount] = ref;
 795         }
 796         git_reference_iterator_free(it);
 797
 798         /* sort by type then shorthand name */
 799         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 800
 801         for (j = 0; j < 2; j++) {
 802                 for (i = 0, count = 0; i < refcount; i++) {
 803                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 804                             !(git_reference_is_tag(refs[i]) && j == 1))
 805                                 continue;
 806
 807                         switch (git_reference_type(refs[i])) {
 808                         case GIT_REF_SYMBOLIC:
 809                                 if (git_reference_resolve(&dref, refs[i]))
 810                                         goto err;
 811                                 r = dref;
 812                                 break;
 813                         case GIT_REF_OID:
 814                                 r = refs[i];
 815                                 break;
 816                         default:
 817                                 continue;
 818                         }
 819                         if (!(id = git_reference_target(r)))
 820                                 goto err;
 821                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 822                                 goto err;
 823                         if (!(id = git_object_id(obj)))
 824                                 goto err;
 825                         if (!(ci = commitinfo_getbyoid(id)))
 826                                 break;
 827
 828                         /* print header if it has an entry (first). */
 829                         if (++count == 1) {
 830                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 831                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 832                                       titles[j], ids[j]);
 833                         }
 834
 835                         relpath = "";
 836                         name = git_reference_shorthand(r);
 837
 838                         fputs("<tr><td>", fp);
 839                         xmlencode(fp, name, strlen(name));
 840                         fputs("</td><td>", fp);
 841                         if (ci->author)
 842                                 printtimeshort(fp, &(ci->author->when));
 843                         fputs("</td><td>", fp);
 844                         if (ci->author)
 845                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 846                         fputs("</td></tr>\n", fp);
 847
 848                         relpath = "../";
 849
 850                         commitinfo_free(ci);
 851                         git_object_free(obj);
 852                         obj = NULL;
 853                         git_reference_free(dref);
 854                         dref = NULL;
 855                 }
 856                 /* table footer */
 857                 if (count)
 858                         fputs("</tbody></table><br/>", fp);
 859         }
 860
 861 err:
 862         git_object_free(obj);
 863         git_reference_free(dref);
 864
 865         for (i = 0; i < refcount; i++)
 866                 git_reference_free(refs[i]);
 867         free(refs);
 868
 869         return 0;
 870 }
 871
 872 int
 873 main(int argc, char *argv[])
 874 {
 875         git_object *obj = NULL;
 876         const git_oid *head = NULL;
 877         const git_error *e = NULL;
 878         FILE *fp, *fpread;
 879         char path[PATH_MAX], *p;
 880         int r, status;
 881
 882         if (argc != 2) {
 883                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 884                 return 1;
 885         }
 886         repodir = argv[1];
 887
 888         git_libgit2_init();
 889
 890         if ((status = git_repository_open_ext(&repo, repodir,
 891                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 892                 e = giterr_last();
 893                 fprintf(stderr, "error %d/%d: %s\n", status, e->klass, e->message);
 894                 return status;
 895         }
 896
 897         /* find HEAD */
 898         if (git_revparse_single(&obj, repo, "HEAD"))
 899                 return 1;
 900         head = git_object_id(obj);
 901         git_object_free(obj);
 902
 903         /* use directory name as name */
 904         name = xbasename(repodir);
 905
 906         /* strip .git suffix */
 907         if (!(stripped_name = strdup(name)))
 908                 err(1, "strdup");
 909         if ((p = strrchr(stripped_name, '.')))
 910                 if (!strcmp(p, ".git"))
 911                         *p = '\0';
 912
 913         /* read description or .git/description */
 914         r = snprintf(path, sizeof(path), "%s%s%s",
 915                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 916         if (r == -1 || (size_t)r >= sizeof(path))
 917                 errx(1, "path truncated: '%s%s%s'",
 918                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 919         if (!(fpread = fopen(path, "r"))) {
 920                 r = snprintf(path, sizeof(path), "%s%s%s",
 921                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 922                 if (r == -1 || (size_t)r >= sizeof(path))
 923                         errx(1, "path truncated: '%s%s%s'",
 924                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 925                 fpread = fopen(path, "r");
 926         }
 927         if (fpread) {
 928                 if (!fgets(description, sizeof(description), fpread))
 929                         description[0] = '\0';
 930                 fclose(fpread);
 931         }
 932
 933         /* read url or .git/url */
 934         r = snprintf(path, sizeof(path), "%s%s%s",
 935                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 936         if (r == -1 || (size_t)r >= sizeof(path))
 937                 errx(1, "path truncated: '%s%s%s'",
 938                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 939         if (!(fpread = fopen(path, "r"))) {
 940                 r = snprintf(path, sizeof(path), "%s%s%s",
 941                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 942                 if (r == -1 || (size_t)r >= sizeof(path))
 943                         errx(1, "path truncated: '%s%s%s'",
 944                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 945                 fpread = fopen(path, "r");
 946         }
 947         if (fpread) {
 948                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
 949                         cloneurl[0] = '\0';
 950                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
 951                 fclose(fpread);
 952         }
 953
 954         /* check LICENSE */
 955         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
 956         git_object_free(obj);
 957         /* check README */
 958         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
 959         git_object_free(obj);
 960
 961         /* log for HEAD */
 962         fp = efopen("log.html", "w");
 963         relpath = "";
 964         writeheader(fp);
 965         mkdir("commit", 0755);
 966         writelog(fp, head);
 967         writefooter(fp);
 968         fclose(fp);
 969
 970         /* files for HEAD */
 971         fp = efopen("files.html", "w");
 972         writeheader(fp);
 973         writefiles(fp, head, "HEAD");
 974         writefooter(fp);
 975         fclose(fp);
 976
 977         /* summary page with branches and tags */
 978         fp = efopen("refs.html", "w");
 979         writeheader(fp);
 980         writerefs(fp);
 981         writefooter(fp);
 982         fclose(fp);
 983
 984         /* Atom feed */
 985         fp = efopen("atom.xml", "w");
 986         writeatom(fp);
 987         fclose(fp);
 988
 989         /* cleanup */
 990         git_repository_free(repo);
 991         git_libgit2_shutdown();
 992
 993         return 0;
 994 }