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 haslicense, hasreadme, hassubmodules;
  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 (hassubmodules)
 255                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 256         if (hasreadme)
 257                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 258         if (haslicense)
 259                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 260         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 261
 262         return 0;
 263 }
 264
 265 int
 266 writefooter(FILE *fp)
 267 {
 268         return !fputs("</div>\n</body>\n</html>\n", fp);
 269 }
 270
 271 int
 272 writeblobhtml(FILE *fp, const git_blob *blob)
 273 {
 274         off_t i;
 275         size_t n = 0;
 276         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 277         const char *s = git_blob_rawcontent(blob);
 278         git_off_t len = git_blob_rawsize(blob);
 279
 280         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 281
 282         if (len) {
 283                 n++;
 284                 fprintf(fp, nfmt, n, n, n);
 285                 for (i = 0; i < len - 1; i++) {
 286                         if (s[i] == '\n') {
 287                                 n++;
 288                                 fprintf(fp, nfmt, n, n, n);
 289                         }
 290                 }
 291         }
 292
 293         fputs("</pre></td><td><pre>\n", fp);
 294         xmlencode(fp, s, (size_t)len);
 295         fputs("</pre></td></tr></table>\n", fp);
 296
 297         return n;
 298 }
 299
 300 void
 301 printcommit(FILE *fp, struct commitinfo *ci)
 302 {
 303         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 304                 relpath, ci->oid, ci->oid);
 305
 306         if (ci->parentoid[0])
 307                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 308                         relpath, ci->parentoid, ci->parentoid);
 309
 310         if (ci->author) {
 311                 fputs("<b>Author:</b> ", fp);
 312                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 313                 fputs(" &lt;<a href=\"mailto:", fp);
 314                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 315                 fputs("\">", fp);
 316                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 317                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 318                 printtime(fp, &(ci->author->when));
 319                 fputc('\n', fp);
 320         }
 321         if (ci->msg) {
 322                 fputc('\n', fp);
 323                 xmlencode(fp, ci->msg, strlen(ci->msg));
 324                 fputc('\n', fp);
 325         }
 326 }
 327
 328 void
 329 printshowfile(FILE *fp, struct commitinfo *ci)
 330 {
 331         const git_diff_delta *delta;
 332         const git_diff_hunk *hunk;
 333         const git_diff_line *line;
 334         git_patch *patch;
 335         git_buf statsbuf;
 336         size_t ndeltas, nhunks, nhunklines;
 337         size_t i, j, k;
 338
 339         printcommit(fp, ci);
 340
 341         memset(&statsbuf, 0, sizeof(statsbuf));
 342
 343         /* diff stat */
 344         if (ci->stats &&
 345             !git_diff_stats_to_buf(&statsbuf, ci->stats,
 346                                    GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) {
 347                 if (statsbuf.ptr && statsbuf.ptr[0]) {
 348                         fputs("<b>Diffstat:</b>\n", fp);
 349                         xmlencode(fp, statsbuf.ptr, strlen(statsbuf.ptr));
 350                 }
 351         }
 352
 353         fputs("<hr/>", fp);
 354
 355         ndeltas = git_diff_num_deltas(ci->diff);
 356         for (i = 0; i < ndeltas; i++) {
 357                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 358                         git_patch_free(patch);
 359                         break;
 360                 }
 361
 362                 delta = git_patch_get_delta(patch);
 363                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 364                         relpath, delta->old_file.path, delta->old_file.path,
 365                         relpath, delta->new_file.path, delta->new_file.path);
 366
 367                 /* check binary data */
 368                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 369                         fputs("Binary files differ\n", fp);
 370                         git_patch_free(patch);
 371                         continue;
 372                 }
 373
 374                 nhunks = git_patch_num_hunks(patch);
 375                 for (j = 0; j < nhunks; j++) {
 376                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 377                                 break;
 378
 379                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 380                         xmlencode(fp, hunk->header, hunk->header_len);
 381                         fputs("</a>", fp);
 382
 383                         for (k = 0; ; k++) {
 384                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 385                                         break;
 386                                 if (line->old_lineno == -1)
 387                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 388                                                 i, j, k, i, j, k);
 389                                 else if (line->new_lineno == -1)
 390                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 391                                                 i, j, k, i, j, k);
 392                                 else
 393                                         fputc(' ', fp);
 394                                 xmlencode(fp, line->content, line->content_len);
 395                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 396                                         fputs("</a>", fp);
 397                         }
 398                 }
 399                 git_patch_free(patch);
 400         }
 401         git_buf_free(&statsbuf);
 402
 403         return;
 404 }
 405
 406 int
 407 writelog(FILE *fp, const git_oid *oid)
 408 {
 409         struct commitinfo *ci;
 410         git_revwalk *w = NULL;
 411         git_oid id;
 412         size_t len;
 413         char path[PATH_MAX];
 414         FILE *fpfile;
 415         int r;
 416
 417         git_revwalk_new(&w, repo);
 418         git_revwalk_push(w, oid);
 419         git_revwalk_sorting(w, GIT_SORT_TIME);
 420         git_revwalk_simplify_first_parent(w);
 421
 422         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
 423                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
 424                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 425
 426         while (!git_revwalk_next(&id, w)) {
 427                 relpath = "";
 428
 429                 if (!(ci = commitinfo_getbyoid(&id)))
 430                         break;
 431
 432                 fputs("<tr><td>", fp);
 433                 if (ci->author)
 434                         printtimeshort(fp, &(ci->author->when));
 435                 fputs("</td><td>", fp);
 436                 if (ci->summary) {
 437                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 438                         if ((len = strlen(ci->summary)) > summarylen) {
 439                                 xmlencode(fp, ci->summary, summarylen - 1);
 440                                 fputs("…", fp);
 441                         } else {
 442                                 xmlencode(fp, ci->summary, len);
 443                         }
 444                         fputs("</a>", fp);
 445                 }
 446                 fputs("</td><td>", fp);
 447                 if (ci->author)
 448                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 449                 fputs("</td><td class=\"num\">", fp);
 450                 fprintf(fp, "%zu", ci->filecount);
 451                 fputs("</td><td class=\"num\">", fp);
 452                 fprintf(fp, "+%zu", ci->addcount);
 453                 fputs("</td><td class=\"num\">", fp);
 454                 fprintf(fp, "-%zu", ci->delcount);
 455                 fputs("</td></tr>\n", fp);
 456
 457                 relpath = "../";
 458
 459                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 460                 if (r == -1 || (size_t)r >= sizeof(path))
 461                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 462
 463                 /* check if file exists if so skip it */
 464                 if (access(path, F_OK)) {
 465                         fpfile = efopen(path, "w");
 466                         writeheader(fpfile, ci->summary);
 467                         fputs("<pre>", fpfile);
 468                         printshowfile(fpfile, ci);
 469                         fputs("</pre>\n", fpfile);
 470                         writefooter(fpfile);
 471                         fclose(fpfile);
 472                 }
 473                 commitinfo_free(ci);
 474         }
 475         fputs("</tbody></table>", fp);
 476
 477         git_revwalk_free(w);
 478
 479         relpath = "";
 480
 481         return 0;
 482 }
 483
 484 void
 485 printcommitatom(FILE *fp, struct commitinfo *ci)
 486 {
 487         fputs("<entry>\n", fp);
 488
 489         fprintf(fp, "<id>%s</id>\n", ci->oid);
 490         if (ci->author) {
 491                 fputs("<updated>", fp);
 492                 printtimez(fp, &(ci->author->when));
 493                 fputs("</updated>\n", fp);
 494         }
 495         if (ci->summary) {
 496                 fputs("<title type=\"text\">", fp);
 497                 xmlencode(fp, ci->summary, strlen(ci->summary));
 498                 fputs("</title>\n", fp);
 499         }
 500         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 501                 ci->oid);
 502
 503         if (ci->author) {
 504                 fputs("<author><name>", fp);
 505                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 506                 fputs("</name>\n<email>", fp);
 507                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 508                 fputs("</email>\n</author>\n", fp);
 509         }
 510
 511         fputs("<content type=\"text\">", fp);
 512         fprintf(fp, "commit %s\n", ci->oid);
 513         if (ci->parentoid[0])
 514                 fprintf(fp, "parent %s\n", ci->parentoid);
 515         if (ci->author) {
 516                 fputs("Author: ", fp);
 517                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 518                 fputs(" &lt;", fp);
 519                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 520                 fputs("&gt;\nDate:   ", fp);
 521                 printtime(fp, &(ci->author->when));
 522                 fputc('\n', fp);
 523         }
 524         if (ci->msg) {
 525                 fputc('\n', fp);
 526                 xmlencode(fp, ci->msg, strlen(ci->msg));
 527         }
 528         fputs("\n</content>\n", fp);
 529
 530         fputs("</entry>\n", fp);
 531 }
 532
 533 int
 534 writeatom(FILE *fp)
 535 {
 536         struct commitinfo *ci;
 537         git_revwalk *w = NULL;
 538         git_oid id;
 539         size_t i, m = 100; /* max */
 540
 541         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 542               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 543         xmlencode(fp, stripped_name, strlen(stripped_name));
 544         fputs(", branch HEAD</title>\n<subtitle>", fp);
 545         xmlencode(fp, description, strlen(description));
 546         fputs("</subtitle>\n", fp);
 547
 548         git_revwalk_new(&w, repo);
 549         git_revwalk_push_head(w);
 550         git_revwalk_sorting(w, GIT_SORT_TIME);
 551         git_revwalk_simplify_first_parent(w);
 552
 553         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 554                 if (!(ci = commitinfo_getbyoid(&id)))
 555                         break;
 556                 printcommitatom(fp, ci);
 557                 commitinfo_free(ci);
 558         }
 559         git_revwalk_free(w);
 560
 561         fputs("</feed>", fp);
 562
 563         return 0;
 564 }
 565
 566 int
 567 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 568 {
 569         char tmp[PATH_MAX] = "";
 570         char *d;
 571         const char *p;
 572         int lc = 0;
 573         FILE *fp;
 574
 575         d = xdirname(fpath);
 576         if (mkdirp(d)) {
 577                 free(d);
 578                 return -1;
 579         }
 580         free(d);
 581
 582         p = fpath;
 583         while (*p) {
 584                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 585                         errx(1, "path truncated: '../%s'", tmp);
 586                 p++;
 587         }
 588         relpath = tmp;
 589
 590         fp = efopen(fpath, "w");
 591         writeheader(fp, filename);
 592         fputs("<p> ", fp);
 593         xmlencode(fp, filename, strlen(filename));
 594         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 595         fputs("</p><hr/>", fp);
 596
 597         if (git_blob_is_binary((git_blob *)obj)) {
 598                 fputs("<p>Binary file</p>\n", fp);
 599         } else {
 600                 lc = writeblobhtml(fp, (git_blob *)obj);
 601                 if (ferror(fp))
 602                         err(1, "fwrite");
 603         }
 604         writefooter(fp);
 605         fclose(fp);
 606
 607         relpath = "";
 608
 609         return lc;
 610 }
 611
 612 const char *
 613 filemode(git_filemode_t m)
 614 {
 615         static char mode[11];
 616
 617         memset(mode, '-', sizeof(mode) - 1);
 618         mode[10] = '\0';
 619
 620         if (S_ISREG(m))
 621                 mode[0] = '-';
 622         else if (S_ISBLK(m))
 623                 mode[0] = 'b';
 624         else if (S_ISCHR(m))
 625                 mode[0] = 'c';
 626         else if (S_ISDIR(m))
 627                 mode[0] = 'd';
 628         else if (S_ISFIFO(m))
 629                 mode[0] = 'p';
 630         else if (S_ISLNK(m))
 631                 mode[0] = 'l';
 632         else if (S_ISSOCK(m))
 633                 mode[0] = 's';
 634         else
 635                 mode[0] = '?';
 636
 637         if (m & S_IRUSR) mode[1] = 'r';
 638         if (m & S_IWUSR) mode[2] = 'w';
 639         if (m & S_IXUSR) mode[3] = 'x';
 640         if (m & S_IRGRP) mode[4] = 'r';
 641         if (m & S_IWGRP) mode[5] = 'w';
 642         if (m & S_IXGRP) mode[6] = 'x';
 643         if (m & S_IROTH) mode[7] = 'r';
 644         if (m & S_IWOTH) mode[8] = 'w';
 645         if (m & S_IXOTH) mode[9] = 'x';
 646
 647         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 648         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 649         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 650
 651         return mode;
 652 }
 653
 654 int
 655 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 656 {
 657         const git_tree_entry *entry = NULL;
 658         git_submodule *module = NULL;
 659         const char *entryname;
 660         char filepath[PATH_MAX], entrypath[PATH_MAX];
 661         git_object *obj = NULL;
 662         git_off_t filesize;
 663         size_t count, i;
 664         int lc, r, ret;
 665
 666         count = git_tree_entrycount(tree);
 667         for (i = 0; i < count; i++) {
 668                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 669                     !(entryname = git_tree_entry_name(entry)))
 670                         return -1;
 671                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 672                          path, path[0] ? "/" : "", entryname);
 673                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 674                         errx(1, "path truncated: '%s%s%s'",
 675                                 path, path[0] ? "/" : "", entryname);
 676
 677                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 678                          path, path[0] ? "/" : "", entryname);
 679                 if (r == -1 || (size_t)r >= sizeof(filepath))
 680                         errx(1, "path truncated: 'file/%s%s%s.html'",
 681                                 path, path[0] ? "/" : "", entryname);
 682
 683                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 684                         switch (git_object_type(obj)) {
 685                         case GIT_OBJ_BLOB:
 686                                 break;
 687                         case GIT_OBJ_TREE:
 688                                 /* NOTE: recurses */
 689                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 690                                                      entrypath);
 691                                 git_object_free(obj);
 692                                 if (ret)
 693                                         return ret;
 694                                 continue;
 695                         default:
 696                                 git_object_free(obj);
 697                                 continue;
 698                         }
 699
 700                         filesize = git_blob_rawsize((git_blob *)obj);
 701                         lc = writeblob(obj, filepath, entryname, filesize);
 702
 703                         fputs("<tr><td>", fp);
 704                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 705                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 706                         xmlencode(fp, entrypath, strlen(entrypath));
 707                         fputs("</a></td><td class=\"num\">", fp);
 708                         if (showlinecount && lc > 0)
 709                                 fprintf(fp, "%dL", lc);
 710                         else
 711                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 712                         fputs("</td></tr>\n", fp);
 713                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 714                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 715                                 relpath);
 716                         xmlencode(fp, entrypath, strlen(entrypath));
 717                         git_submodule_free(module);
 718                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 719                 }
 720         }
 721
 722         return 0;
 723 }
 724
 725 int
 726 writefiles(FILE *fp, const git_oid *id, const char *branch)
 727 {
 728         git_tree *tree = NULL;
 729         git_commit *commit = NULL;
 730         int ret = -1;
 731
 732         fputs("<table id=\"files\"><thead>\n<tr>"
 733               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 734               "</tr>\n</thead><tbody>\n", fp);
 735
 736         if (git_commit_lookup(&commit, repo, id) ||
 737             git_commit_tree(&tree, commit))
 738                 goto err;
 739         ret = writefilestree(fp, tree, branch, "");
 740
 741 err:
 742         fputs("</tbody></table>", fp);
 743
 744         git_commit_free(commit);
 745         git_tree_free(tree);
 746
 747         return ret;
 748 }
 749
 750 int
 751 refs_cmp(const void *v1, const void *v2)
 752 {
 753         git_reference *r1 = (*(git_reference **)v1);
 754         git_reference *r2 = (*(git_reference **)v2);
 755         int t1, t2;
 756
 757         t1 = git_reference_is_branch(r1);
 758         t2 = git_reference_is_branch(r2);
 759
 760         if (t1 != t2)
 761                 return t1 - t2;
 762
 763         return strcmp(git_reference_shorthand(r1),
 764                       git_reference_shorthand(r2));
 765 }
 766
 767 int
 768 writerefs(FILE *fp)
 769 {
 770         struct commitinfo *ci;
 771         const git_oid *id = NULL;
 772         git_object *obj = NULL;
 773         git_reference *dref = NULL, *r, *ref = NULL;
 774         git_reference_iterator *it = NULL;
 775         git_reference **refs = NULL;
 776         size_t count, i, j, refcount = 0;
 777         const char *titles[] = { "Branches", "Tags" };
 778         const char *ids[] = { "branches", "tags" };
 779         const char *name;
 780
 781         if (git_reference_iterator_new(&it, repo))
 782                 return -1;
 783
 784         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 785                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 786                         err(1, "realloc");
 787                 refs[refcount] = ref;
 788         }
 789         git_reference_iterator_free(it);
 790
 791         /* sort by type then shorthand name */
 792         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 793
 794         for (j = 0; j < 2; j++) {
 795                 for (i = 0, count = 0; i < refcount; i++) {
 796                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 797                             !(git_reference_is_tag(refs[i]) && j == 1))
 798                                 continue;
 799
 800                         switch (git_reference_type(refs[i])) {
 801                         case GIT_REF_SYMBOLIC:
 802                                 if (git_reference_resolve(&dref, refs[i]))
 803                                         goto err;
 804                                 r = dref;
 805                                 break;
 806                         case GIT_REF_OID:
 807                                 r = refs[i];
 808                                 break;
 809                         default:
 810                                 continue;
 811                         }
 812                         if (!(id = git_reference_target(r)))
 813                                 goto err;
 814                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 815                                 goto err;
 816                         if (!(id = git_object_id(obj)))
 817                                 goto err;
 818                         if (!(ci = commitinfo_getbyoid(id)))
 819                                 break;
 820
 821                         /* print header if it has an entry (first). */
 822                         if (++count == 1) {
 823                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 824                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 825                                       titles[j], ids[j]);
 826                         }
 827
 828                         relpath = "";
 829                         name = git_reference_shorthand(r);
 830
 831                         fputs("<tr><td>", fp);
 832                         xmlencode(fp, name, strlen(name));
 833                         fputs("</td><td>", fp);
 834                         if (ci->author)
 835                                 printtimeshort(fp, &(ci->author->when));
 836                         fputs("</td><td>", fp);
 837                         if (ci->author)
 838                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 839                         fputs("</td></tr>\n", fp);
 840
 841                         relpath = "../";
 842
 843                         commitinfo_free(ci);
 844                         git_object_free(obj);
 845                         obj = NULL;
 846                         git_reference_free(dref);
 847                         dref = NULL;
 848                 }
 849                 /* table footer */
 850                 if (count)
 851                         fputs("</tbody></table><br/>", fp);
 852         }
 853
 854 err:
 855         git_object_free(obj);
 856         git_reference_free(dref);
 857
 858         for (i = 0; i < refcount; i++)
 859                 git_reference_free(refs[i]);
 860         free(refs);
 861
 862         return 0;
 863 }
 864
 865 int
 866 main(int argc, char *argv[])
 867 {
 868         git_object *obj = NULL;
 869         const git_oid *head = NULL;
 870         const git_error *e = NULL;
 871         FILE *fp, *fpread;
 872         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
 873         int r, status;
 874
 875         if (argc != 2) {
 876                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 877                 return 1;
 878         }
 879         repodir = argv[1];
 880         if (!realpath(repodir, repodirabs))
 881                 err(1, "realpath");
 882
 883         git_libgit2_init();
 884
 885         if ((status = git_repository_open_ext(&repo, repodir,
 886                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 887                 e = giterr_last();
 888                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
 889                 return status;
 890         }
 891
 892         /* find HEAD */
 893         if (git_revparse_single(&obj, repo, "HEAD"))
 894                 return 1;
 895         head = git_object_id(obj);
 896         git_object_free(obj);
 897
 898         /* use directory name as name */
 899         if ((name = strrchr(repodirabs, '/')))
 900                 name++;
 901         else
 902                 name = "";
 903
 904         /* strip .git suffix */
 905         if (!(stripped_name = strdup(name)))
 906                 err(1, "strdup");
 907         if ((p = strrchr(stripped_name, '.')))
 908                 if (!strcmp(p, ".git"))
 909                         *p = '\0';
 910
 911         /* read description or .git/description */
 912         r = snprintf(path, sizeof(path), "%s%s%s",
 913                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 914         if (r == -1 || (size_t)r >= sizeof(path))
 915                 errx(1, "path truncated: '%s%s%s'",
 916                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 917         if (!(fpread = fopen(path, "r"))) {
 918                 r = snprintf(path, sizeof(path), "%s%s%s",
 919                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 920                 if (r == -1 || (size_t)r >= sizeof(path))
 921                         errx(1, "path truncated: '%s%s%s'",
 922                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 923                 fpread = fopen(path, "r");
 924         }
 925         if (fpread) {
 926                 if (!fgets(description, sizeof(description), fpread))
 927                         description[0] = '\0';
 928                 fclose(fpread);
 929         }
 930
 931         /* read url or .git/url */
 932         r = snprintf(path, sizeof(path), "%s%s%s",
 933                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 934         if (r == -1 || (size_t)r >= sizeof(path))
 935                 errx(1, "path truncated: '%s%s%s'",
 936                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
 937         if (!(fpread = fopen(path, "r"))) {
 938                 r = snprintf(path, sizeof(path), "%s%s%s",
 939                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 940                 if (r == -1 || (size_t)r >= sizeof(path))
 941                         errx(1, "path truncated: '%s%s%s'",
 942                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
 943                 fpread = fopen(path, "r");
 944         }
 945         if (fpread) {
 946                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
 947                         cloneurl[0] = '\0';
 948                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
 949                 fclose(fpread);
 950         }
 951
 952         /* check LICENSE */
 953         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
 954         git_object_free(obj);
 955         /* check README */
 956         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
 957         git_object_free(obj);
 958         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
 959         git_object_free(obj);
 960
 961         /* log for HEAD */
 962         fp = efopen("log.html", "w");
 963         relpath = "";
 964         writeheader(fp, "Log");
 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, "Files");
 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, "Refs");
 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 }