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 int
 166 mkdirp(const char *path)
 167 {
 168         char tmp[PATH_MAX], *p;
 169
 170         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 171                 errx(1, "path truncated: '%s'", path);
 172         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 173                 if (*p != '/')
 174                         continue;
 175                 *p = '\0';
 176                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 177                         return -1;
 178                 *p = '/';
 179         }
 180         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 181                 return -1;
 182         return 0;
 183 }
 184
 185 void
 186 printtimeformat(FILE *fp, const git_time *intime, const char *fmt)
 187 {
 188         struct tm *intm;
 189         time_t t;
 190         char out[32];
 191
 192         t = (time_t) intime->time + (intime->offset * 60);
 193         if (!(intm = gmtime(&t)))
 194                 return;
 195         strftime(out, sizeof(out), fmt, intm);
 196         fputs(out, fp);
 197 }
 198
 199 void
 200 printtimez(FILE *fp, const git_time *intime)
 201 {
 202         printtimeformat(fp, intime, "%Y-%m-%dT%H:%M:%SZ");
 203 }
 204
 205 void
 206 printtime(FILE *fp, const git_time *intime)
 207 {
 208         printtimeformat(fp, intime, "%a %b %e %T %Y");
 209 }
 210
 211 void
 212 printtimeshort(FILE *fp, const git_time *intime)
 213 {
 214         printtimeformat(fp, intime, "%Y-%m-%d %H:%M");
 215 }
 216
 217 int
 218 writeheader(FILE *fp, const char *title)
 219 {
 220         fputs("<!DOCTYPE html>\n"
 221                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 222                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 223                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 224         xmlencode(fp, title, strlen(title));
 225         if (title[0] && stripped_name[0])
 226                 fputs(" - ", fp);
 227         xmlencode(fp, stripped_name, strlen(stripped_name));
 228         if (description[0])
 229                 fputs(" - ", fp);
 230         xmlencode(fp, description, strlen(description));
 231         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 232         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 233                 name, relpath);
 234         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 235         fputs("</head>\n<body>\n<table><tr><td>", fp);
 236         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 237                 relpath, relpath);
 238         fputs("</td><td><h1>", fp);
 239         xmlencode(fp, stripped_name, strlen(stripped_name));
 240         fputs("</h1><span class=\"desc\">", fp);
 241         xmlencode(fp, description, strlen(description));
 242         fputs("</span></td></tr>", fp);
 243         if (cloneurl[0]) {
 244                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 245                 xmlencode(fp, cloneurl, strlen(cloneurl));
 246                 fputs("\">", fp);
 247                 xmlencode(fp, cloneurl, strlen(cloneurl));
 248                 fputs("</a></td></tr>", fp);
 249         }
 250         fputs("<tr><td></td><td>\n", fp);
 251         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 252         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 253         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 254         if (hasreadme)
 255                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 256         if (haslicense)
 257                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 258         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 259
 260         return 0;
 261 }
 262
 263 int
 264 writefooter(FILE *fp)
 265 {
 266         return !fputs("</div>\n</body>\n</html>\n", fp);
 267 }
 268
 269 int
 270 writeblobhtml(FILE *fp, const git_blob *blob)
 271 {
 272         off_t i;
 273         size_t n = 0;
 274         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 275         const char *s = git_blob_rawcontent(blob);
 276         git_off_t len = git_blob_rawsize(blob);
 277
 278         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 279
 280         if (len) {
 281                 n++;
 282                 fprintf(fp, nfmt, n, n, n);
 283                 for (i = 0; i < len - 1; i++) {
 284                         if (s[i] == '\n') {
 285                                 n++;
 286                                 fprintf(fp, nfmt, n, n, n);
 287                         }
 288                 }
 289         }
 290
 291         fputs("</pre></td><td><pre>\n", fp);
 292         xmlencode(fp, s, (size_t)len);
 293         fputs("</pre></td></tr></table>\n", fp);
 294
 295         return n;
 296 }
 297
 298 void
 299 printcommit(FILE *fp, struct commitinfo *ci)
 300 {
 301         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 302                 relpath, ci->oid, ci->oid);
 303
 304         if (ci->parentoid[0])
 305                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 306                         relpath, ci->parentoid, ci->parentoid);
 307
 308         if (ci->author) {
 309                 fputs("<b>Author:</b> ", fp);
 310                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 311                 fputs(" &lt;<a href=\"mailto:", fp);
 312                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 313                 fputs("\">", fp);
 314                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 315                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 316                 printtime(fp, &(ci->author->when));
 317                 fputc('\n', fp);
 318         }
 319         if (ci->msg) {
 320                 fputc('\n', fp);
 321                 xmlencode(fp, ci->msg, strlen(ci->msg));
 322                 fputc('\n', fp);
 323         }
 324 }
 325
 326 void
 327 printshowfile(FILE *fp, struct commitinfo *ci)
 328 {
 329         const git_diff_delta *delta;
 330         const git_diff_hunk *hunk;
 331         const git_diff_line *line;
 332         git_patch *patch;
 333         git_buf statsbuf;
 334         size_t ndeltas, nhunks, nhunklines;
 335         size_t i, j, k;
 336
 337         printcommit(fp, ci);
 338
 339         memset(&statsbuf, 0, sizeof(statsbuf));
 340
 341         /* diff stat */
 342         if (ci->stats &&
 343             !git_diff_stats_to_buf(&statsbuf, ci->stats,
 344                                    GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) {
 345                 if (statsbuf.ptr && statsbuf.ptr[0]) {
 346                         fputs("<b>Diffstat:</b>\n", fp);
 347                         xmlencode(fp, statsbuf.ptr, strlen(statsbuf.ptr));
 348                 }
 349         }
 350
 351         fputs("<hr/>", fp);
 352
 353         ndeltas = git_diff_num_deltas(ci->diff);
 354         for (i = 0; i < ndeltas; i++) {
 355                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 356                         git_patch_free(patch);
 357                         break;
 358                 }
 359
 360                 delta = git_patch_get_delta(patch);
 361                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 362                         relpath, delta->old_file.path, delta->old_file.path,
 363                         relpath, delta->new_file.path, delta->new_file.path);
 364
 365                 /* check binary data */
 366                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 367                         fputs("Binary files differ\n", fp);
 368                         git_patch_free(patch);
 369                         continue;
 370                 }
 371
 372                 nhunks = git_patch_num_hunks(patch);
 373                 for (j = 0; j < nhunks; j++) {
 374                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 375                                 break;
 376
 377                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 378                         xmlencode(fp, hunk->header, hunk->header_len);
 379                         fputs("</a>", fp);
 380
 381                         for (k = 0; ; k++) {
 382                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 383                                         break;
 384                                 if (line->old_lineno == -1)
 385                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 386                                                 i, j, k, i, j, k);
 387                                 else if (line->new_lineno == -1)
 388                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 389                                                 i, j, k, i, j, k);
 390                                 else
 391                                         fputc(' ', fp);
 392                                 xmlencode(fp, line->content, line->content_len);
 393                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 394                                         fputs("</a>", fp);
 395                         }
 396                 }
 397                 git_patch_free(patch);
 398         }
 399         git_buf_free(&statsbuf);
 400
 401         return;
 402 }
 403
 404 int
 405 writelog(FILE *fp, const git_oid *oid)
 406 {
 407         struct commitinfo *ci;
 408         git_revwalk *w = NULL;
 409         git_oid id;
 410         size_t len;
 411         char path[PATH_MAX];
 412         FILE *fpfile;
 413         int r;
 414
 415         git_revwalk_new(&w, repo);
 416         git_revwalk_push(w, oid);
 417         git_revwalk_sorting(w, GIT_SORT_TIME);
 418         git_revwalk_simplify_first_parent(w);
 419
 420         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
 421                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
 422                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 423
 424         while (!git_revwalk_next(&id, w)) {
 425                 relpath = "";
 426
 427                 if (!(ci = commitinfo_getbyoid(&id)))
 428                         break;
 429
 430                 fputs("<tr><td>", fp);
 431                 if (ci->author)
 432                         printtimeshort(fp, &(ci->author->when));
 433                 fputs("</td><td>", fp);
 434                 if (ci->summary) {
 435                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 436                         if ((len = strlen(ci->summary)) > summarylen) {
 437                                 xmlencode(fp, ci->summary, summarylen - 1);
 438                                 fputs("…", fp);
 439                         } else {
 440                                 xmlencode(fp, ci->summary, len);
 441                         }
 442                         fputs("</a>", fp);
 443                 }
 444                 fputs("</td><td>", fp);
 445                 if (ci->author)
 446                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 447                 fputs("</td><td class=\"num\">", fp);
 448                 fprintf(fp, "%zu", ci->filecount);
 449                 fputs("</td><td class=\"num\">", fp);
 450                 fprintf(fp, "+%zu", ci->addcount);
 451                 fputs("</td><td class=\"num\">", fp);
 452                 fprintf(fp, "-%zu", ci->delcount);
 453                 fputs("</td></tr>\n", fp);
 454
 455                 relpath = "../";
 456
 457                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 458                 if (r == -1 || (size_t)r >= sizeof(path))
 459                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 460
 461                 /* check if file exists if so skip it */
 462                 if (access(path, F_OK)) {
 463                         fpfile = efopen(path, "w");
 464                         writeheader(fpfile, ci->summary);
 465                         fputs("<pre>", fpfile);
 466                         printshowfile(fpfile, ci);
 467                         fputs("</pre>\n", fpfile);
 468                         writefooter(fpfile);
 469                         fclose(fpfile);
 470                 }
 471                 commitinfo_free(ci);
 472         }
 473         fputs("</tbody></table>", fp);
 474
 475         git_revwalk_free(w);
 476
 477         relpath = "";
 478
 479         return 0;
 480 }
 481
 482 void
 483 printcommitatom(FILE *fp, struct commitinfo *ci)
 484 {
 485         fputs("<entry>\n", fp);
 486
 487         fprintf(fp, "<id>%s</id>\n", ci->oid);
 488         if (ci->author) {
 489                 fputs("<updated>", fp);
 490                 printtimez(fp, &(ci->author->when));
 491                 fputs("</updated>\n", fp);
 492         }
 493         if (ci->summary) {
 494                 fputs("<title type=\"text\">", fp);
 495                 xmlencode(fp, ci->summary, strlen(ci->summary));
 496                 fputs("</title>\n", fp);
 497         }
 498         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 499                 ci->oid);
 500
 501         if (ci->author) {
 502                 fputs("<author><name>", fp);
 503                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 504                 fputs("</name>\n<email>", fp);
 505                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 506                 fputs("</email>\n</author>\n", fp);
 507         }
 508
 509         fputs("<content type=\"text\">", fp);
 510         fprintf(fp, "commit %s\n", ci->oid);
 511         if (ci->parentoid[0])
 512                 fprintf(fp, "parent %s\n", ci->parentoid);
 513         if (ci->author) {
 514                 fputs("Author: ", fp);
 515                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 516                 fputs(" &lt;", fp);
 517                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 518                 fputs("&gt;\nDate:   ", fp);
 519                 printtime(fp, &(ci->author->when));
 520                 fputc('\n', fp);
 521         }
 522         if (ci->msg) {
 523                 fputc('\n', fp);
 524                 xmlencode(fp, ci->msg, strlen(ci->msg));
 525         }
 526         fputs("\n</content>\n", fp);
 527
 528         fputs("</entry>\n", fp);
 529 }
 530
 531 int
 532 writeatom(FILE *fp)
 533 {
 534         struct commitinfo *ci;
 535         git_revwalk *w = NULL;
 536         git_oid id;
 537         size_t i, m = 100; /* max */
 538
 539         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 540               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 541         xmlencode(fp, stripped_name, strlen(stripped_name));
 542         fputs(", branch HEAD</title>\n<subtitle>", fp);
 543         xmlencode(fp, description, strlen(description));
 544         fputs("</subtitle>\n", fp);
 545
 546         git_revwalk_new(&w, repo);
 547         git_revwalk_push_head(w);
 548         git_revwalk_sorting(w, GIT_SORT_TIME);
 549         git_revwalk_simplify_first_parent(w);
 550
 551         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 552                 if (!(ci = commitinfo_getbyoid(&id)))
 553                         break;
 554                 printcommitatom(fp, ci);
 555                 commitinfo_free(ci);
 556         }
 557         git_revwalk_free(w);
 558
 559         fputs("</feed>", fp);
 560
 561         return 0;
 562 }
 563
 564 int
 565 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 566 {
 567         char tmp[PATH_MAX] = "";
 568         char *d;
 569         const char *p;
 570         int lc = 0;
 571         FILE *fp;
 572
 573         d = xdirname(fpath);
 574         if (mkdirp(d)) {
 575                 free(d);
 576                 return -1;
 577         }
 578         free(d);
 579
 580         p = fpath;
 581         while (*p) {
 582                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 583                         errx(1, "path truncated: '../%s'", tmp);
 584                 p++;
 585         }
 586         relpath = tmp;
 587
 588         fp = efopen(fpath, "w");
 589         writeheader(fp, filename);
 590         fputs("<p> ", fp);
 591         xmlencode(fp, filename, strlen(filename));
 592         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 593         fputs("</p><hr/>", fp);
 594
 595         if (git_blob_is_binary((git_blob *)obj)) {
 596                 fputs("<p>Binary file</p>\n", fp);
 597         } else {
 598                 lc = writeblobhtml(fp, (git_blob *)obj);
 599                 if (ferror(fp))
 600                         err(1, "fwrite");
 601         }
 602         writefooter(fp);
 603         fclose(fp);
 604
 605         relpath = "";
 606
 607         return lc;
 608 }
 609
 610 const char *
 611 filemode(git_filemode_t m)
 612 {
 613         static char mode[11];
 614
 615         memset(mode, '-', sizeof(mode) - 1);
 616         mode[10] = '\0';
 617
 618         if (S_ISREG(m))
 619                 mode[0] = '-';
 620         else if (S_ISBLK(m))
 621                 mode[0] = 'b';
 622         else if (S_ISCHR(m))
 623                 mode[0] = 'c';
 624         else if (S_ISDIR(m))
 625                 mode[0] = 'd';
 626         else if (S_ISFIFO(m))
 627                 mode[0] = 'p';
 628         else if (S_ISLNK(m))
 629                 mode[0] = 'l';
 630         else if (S_ISSOCK(m))
 631                 mode[0] = 's';
 632         else
 633                 mode[0] = '?';
 634
 635         if (m & S_IRUSR) mode[1] = 'r';
 636         if (m & S_IWUSR) mode[2] = 'w';
 637         if (m & S_IXUSR) mode[3] = 'x';
 638         if (m & S_IRGRP) mode[4] = 'r';
 639         if (m & S_IWGRP) mode[5] = 'w';
 640         if (m & S_IXGRP) mode[6] = 'x';
 641         if (m & S_IROTH) mode[7] = 'r';
 642         if (m & S_IWOTH) mode[8] = 'w';
 643         if (m & S_IXOTH) mode[9] = 'x';
 644
 645         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 646         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 647         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 648
 649         return mode;
 650 }
 651
 652 int
 653 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 654 {
 655         const git_tree_entry *entry = NULL;
 656         git_submodule *module = NULL;
 657         const char *entryname;
 658         char filepath[PATH_MAX], entrypath[PATH_MAX];
 659         git_object *obj = NULL;
 660         git_off_t filesize;
 661         size_t count, i;
 662         int lc, r, ret;
 663
 664         count = git_tree_entrycount(tree);
 665         for (i = 0; i < count; i++) {
 666                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 667                     !(entryname = git_tree_entry_name(entry)))
 668                         return -1;
 669                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 670                          path, path[0] ? "/" : "", entryname);
 671                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 672                         errx(1, "path truncated: '%s%s%s'",
 673                                 path, path[0] ? "/" : "", entryname);
 674
 675                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 676                          path, path[0] ? "/" : "", entryname);
 677                 if (r == -1 || (size_t)r >= sizeof(filepath))
 678                         errx(1, "path truncated: 'file/%s%s%s.html'",
 679                                 path, path[0] ? "/" : "", entryname);
 680
 681                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 682                         switch (git_object_type(obj)) {
 683                         case GIT_OBJ_BLOB:
 684                                 break;
 685                         case GIT_OBJ_TREE:
 686                                 /* NOTE: recurses */
 687                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 688                                                      entrypath);
 689                                 git_object_free(obj);
 690                                 if (ret)
 691                                         return ret;
 692                                 continue;
 693                         default:
 694                                 git_object_free(obj);
 695                                 continue;
 696                         }
 697
 698                         filesize = git_blob_rawsize((git_blob *)obj);
 699                         lc = writeblob(obj, filepath, entryname, filesize);
 700
 701                         fputs("<tr><td>", fp);
 702                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 703                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 704                         xmlencode(fp, entrypath, strlen(entrypath));
 705                         fputs("</a></td><td class=\"num\">", fp);
 706                         if (showlinecount && lc > 0)
 707                                 fprintf(fp, "%dL", lc);
 708                         else
 709                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 710                         fputs("</td></tr>\n", fp);
 711                 } else if (git_submodule_lookup(&module, repo, entryname) == 0) {
 712
 713                         fprintf(fp, "<tr><td></td><td><a class=\"module\" href=\"%s\">@",
 714                                 git_submodule_url(module));
 715                         xmlencode(fp, entrypath, strlen(entrypath));
 716                         fprintf(fp, "</a></td><td class=\"num\">0%c",
 717                                 showlinecount ? 'L' : 'B');
 718                         git_submodule_free(module);
 719                         fputs("</td></tr>\n", fp);
 720                 }
 721         }
 722
 723         return 0;
 724 }
 725
 726 int
 727 writefiles(FILE *fp, const git_oid *id, const char *branch)
 728 {
 729         git_tree *tree = 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_commit_lookup(&commit, repo, id) ||
 738             git_commit_tree(&tree, commit))
 739                 goto err;
 740         ret = writefilestree(fp, tree, branch, "");
 741
 742 err:
 743         fputs("</tbody></table>", fp);
 744
 745         git_commit_free(commit);
 746         git_tree_free(tree);
 747
 748         return ret;
 749 }
 750
 751 int
 752 refs_cmp(const void *v1, const void *v2)
 753 {
 754         git_reference *r1 = (*(git_reference **)v1);
 755         git_reference *r2 = (*(git_reference **)v2);
 756         int t1, t2;
 757
 758         t1 = git_reference_is_branch(r1);
 759         t2 = git_reference_is_branch(r2);
 760
 761         if (t1 != t2)
 762                 return t1 - t2;
 763
 764         return strcmp(git_reference_shorthand(r1),
 765                       git_reference_shorthand(r2));
 766 }
 767
 768 int
 769 writerefs(FILE *fp)
 770 {
 771         struct commitinfo *ci;
 772         const git_oid *id = NULL;
 773         git_object *obj = NULL;
 774         git_reference *dref = NULL, *r, *ref = NULL;
 775         git_reference_iterator *it = NULL;
 776         git_reference **refs = NULL;
 777         size_t count, i, j, refcount = 0;
 778         const char *titles[] = { "Branches", "Tags" };
 779         const char *ids[] = { "branches", "tags" };
 780         const char *name;
 781
 782         if (git_reference_iterator_new(&it, repo))
 783                 return -1;
 784
 785         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 786                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 787                         err(1, "realloc");
 788                 refs[refcount] = ref;
 789         }
 790         git_reference_iterator_free(it);
 791
 792         /* sort by type then shorthand name */
 793         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 794
 795         for (j = 0; j < 2; j++) {
 796                 for (i = 0, count = 0; i < refcount; i++) {
 797                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 798                             !(git_reference_is_tag(refs[i]) && j == 1))
 799                                 continue;
 800
 801                         switch (git_reference_type(refs[i])) {
 802                         case GIT_REF_SYMBOLIC:
 803                                 if (git_reference_resolve(&dref, refs[i]))
 804                                         goto err;
 805                                 r = dref;
 806                                 break;
 807                         case GIT_REF_OID:
 808                                 r = refs[i];
 809                                 break;
 810                         default:
 811                                 continue;
 812                         }
 813                         if (!(id = git_reference_target(r)))
 814                                 goto err;
 815                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 816                                 goto err;
 817                         if (!(id = git_object_id(obj)))
 818                                 goto err;
 819                         if (!(ci = commitinfo_getbyoid(id)))
 820                                 break;
 821
 822                         /* print header if it has an entry (first). */
 823                         if (++count == 1) {
 824                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 825                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 826                                       titles[j], ids[j]);
 827                         }
 828
 829                         relpath = "";
 830                         name = git_reference_shorthand(r);
 831
 832                         fputs("<tr><td>", fp);
 833                         xmlencode(fp, name, strlen(name));
 834                         fputs("</td><td>", fp);
 835                         if (ci->author)
 836                                 printtimeshort(fp, &(ci->author->when));
 837                         fputs("</td><td>", fp);
 838                         if (ci->author)
 839                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 840                         fputs("</td></tr>\n", fp);
 841
 842                         relpath = "../";
 843
 844                         commitinfo_free(ci);
 845                         git_object_free(obj);
 846                         obj = NULL;
 847                         git_reference_free(dref);
 848                         dref = NULL;
 849                 }
 850                 /* table footer */
 851                 if (count)
 852                         fputs("</tbody></table><br/>", fp);
 853         }
 854
 855 err:
 856         git_object_free(obj);
 857         git_reference_free(dref);
 858
 859         for (i = 0; i < refcount; i++)
 860                 git_reference_free(refs[i]);
 861         free(refs);
 862
 863         return 0;
 864 }
 865
 866 int
 867 main(int argc, char *argv[])
 868 {
 869         git_object *obj = NULL;
 870         const git_oid *head = NULL;
 871         const git_error *e = NULL;
 872         FILE *fp, *fpread;
 873         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
 874         int r, status;
 875
 876         if (argc != 2) {
 877                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 878                 return 1;
 879         }
 880         repodir = argv[1];
 881         if (!realpath(repodir, repodirabs))
 882                 err(1, "realpath");
 883
 884         git_libgit2_init();
 885
 886         if ((status = git_repository_open_ext(&repo, repodir,
 887                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 888                 e = giterr_last();
 889                 fprintf(stderr, "error %d/%d: %s\n", status, e->klass, e->message);
 890                 return status;
 891         }
 892
 893         /* find HEAD */
 894         if (git_revparse_single(&obj, repo, "HEAD"))
 895                 return 1;
 896         head = git_object_id(obj);
 897         git_object_free(obj);
 898
 899         /* use directory name as name */
 900         if ((name = strrchr(repodirabs, '/')))
 901                 name++;
 902         else
 903                 name = "";
 904
 905         /* strip .git suffix */
 906         if (!(stripped_name = strdup(name)))
 907                 err(1, "strdup");
 908         if ((p = strrchr(stripped_name, '.')))
 909                 if (!strcmp(p, ".git"))
 910                         *p = '\0';
 911
 912         /* read description or .git/description */
 913         r = snprintf(path, sizeof(path), "%s%s%s",
 914                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 915         if (r == -1 || (size_t)r >= sizeof(path))
 916                 errx(1, "path truncated: '%s%s%s'",
 917                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 918         if (!(fpread = fopen(path, "r"))) {
 919                 r = snprintf(path, sizeof(path), "%s%s%s",
 920                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 921                 if (r == -1 || (size_t)r >= sizeof(path))
 922                         errx(1, "path truncated: '%s%s%s'",
 923                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 924                 fpread = fopen(path, "r");
 925         }
 926         if (fpread) {
 927                 if (!fgets(description, sizeof(description), fpread))
 928                         description[0] = '\0';
 929                 fclose(fpread);
 930         }
 931
 932         /* read url or .git/url */
 933         r = snprintf(path, sizeof(path), "%s%s%s",
 934                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 935         if (r == -1 || (size_t)r >= sizeof(path))
 936                 errx(1, "path truncated: '%s%s%s'",
 937                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 938         if (!(fpread = fopen(path, "r"))) {
 939                 r = snprintf(path, sizeof(path), "%s%s%s",
 940                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 941                 if (r == -1 || (size_t)r >= sizeof(path))
 942                         errx(1, "path truncated: '%s%s%s'",
 943                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 944                 fpread = fopen(path, "r");
 945         }
 946         if (fpread) {
 947                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
 948                         cloneurl[0] = '\0';
 949                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
 950                 fclose(fpread);
 951         }
 952
 953         /* check LICENSE */
 954         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
 955         git_object_free(obj);
 956         /* check README */
 957         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
 958         git_object_free(obj);
 959
 960         /* log for HEAD */
 961         fp = efopen("log.html", "w");
 962         relpath = "";
 963         writeheader(fp, "Log");
 964         mkdir("commit", 0755);
 965         writelog(fp, head);
 966         writefooter(fp);
 967         fclose(fp);
 968
 969         /* files for HEAD */
 970         fp = efopen("files.html", "w");
 971         writeheader(fp, "Files");
 972         writefiles(fp, head, "HEAD");
 973         writefooter(fp);
 974         fclose(fp);
 975
 976         /* summary page with branches and tags */
 977         fp = efopen("refs.html", "w");
 978         writeheader(fp, "Refs");
 979         writerefs(fp);
 980         writefooter(fp);
 981         fclose(fp);
 982
 983         /* Atom feed */
 984         fp = efopen("atom.xml", "w");
 985         writeatom(fp);
 986         fclose(fp);
 987
 988         /* cleanup */
 989         git_repository_free(repo);
 990         git_libgit2_shutdown();
 991
 992         return 0;
 993 }