stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <libgen.h>
   7 #include <limits.h>
   8 #include <stdint.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <time.h>
  13 #include <unistd.h>
  14
  15 #include <git2.h>
  16
  17 #include "compat.h"
  18
  19 struct deltainfo {
  20         git_patch *patch;
  21
  22         size_t addcount;
  23         size_t delcount;
  24 };
  25
  26 struct commitinfo {
  27         const git_oid *id;
  28
  29         char oid[GIT_OID_HEXSZ + 1];
  30         char parentoid[GIT_OID_HEXSZ + 1];
  31
  32         const git_signature *author;
  33         const git_signature *committer;
  34         const char          *summary;
  35         const char          *msg;
  36
  37         git_diff   *diff;
  38         git_commit *commit;
  39         git_commit *parent;
  40         git_tree   *commit_tree;
  41         git_tree   *parent_tree;
  42
  43         size_t addcount;
  44         size_t delcount;
  45         size_t filecount;
  46
  47         struct deltainfo **deltas;
  48         size_t ndeltas;
  49 };
  50
  51 static git_repository *repo;
  52
  53 static const char *relpath = "";
  54 static const char *repodir;
  55
  56 static char *name = "";
  57 static char *strippedname = "";
  58 static char description[255];
  59 static char cloneurl[1024];
  60 static char *submodules;
  61 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
  62 static char *license;
  63 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
  64 static char *readme;
  65 static long long nlogcommits = -1; /* < 0 indicates not used */
  66
  67 /* cache */
  68 static git_oid lastoid;
  69 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  70 static FILE *rcachefp, *wcachefp;
  71 static const char *cachefile;
  72
  73 void
  74 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  75 {
  76         int r;
  77
  78         r = snprintf(buf, bufsiz, "%s%s%s",
  79                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  80         if (r < 0 || (size_t)r >= bufsiz)
  81                 errx(1, "path truncated: '%s%s%s'",
  82                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  83 }
  84
  85 void
  86 deltainfo_free(struct deltainfo *di)
  87 {
  88         if (!di)
  89                 return;
  90         git_patch_free(di->patch);
  91         memset(di, 0, sizeof(*di));
  92         free(di);
  93 }
  94
  95 int
  96 commitinfo_getstats(struct commitinfo *ci)
  97 {
  98         struct deltainfo *di;
  99         git_diff_options opts;
 100         git_diff_find_options fopts;
 101         const git_diff_delta *delta;
 102         const git_diff_hunk *hunk;
 103         const git_diff_line *line;
 104         git_patch *patch = NULL;
 105         size_t ndeltas, nhunks, nhunklines;
 106         size_t i, j, k;
 107
 108         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 109                 goto err;
 110         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 111                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 112                         ci->parent = NULL;
 113                         ci->parent_tree = NULL;
 114                 }
 115         }
 116
 117         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 118         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 119                       GIT_DIFF_IGNORE_SUBMODULES |
 120                       GIT_DIFF_INCLUDE_TYPECHANGE;
 121         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 122                 goto err;
 123
 124         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 125                 goto err;
 126         /* find renames and copies, exact matches (no heuristic) for renames. */
 127         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
 128                        GIT_DIFF_FIND_EXACT_MATCH_ONLY;
 129         if (git_diff_find_similar(ci->diff, &fopts))
 130                 goto err;
 131
 132         ndeltas = git_diff_num_deltas(ci->diff);
 133         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 134                 err(1, "calloc");
 135
 136         for (i = 0; i < ndeltas; i++) {
 137                 if (git_patch_from_diff(&patch, ci->diff, i))
 138                         goto err;
 139
 140                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 141                         err(1, "calloc");
 142                 di->patch = patch;
 143                 ci->deltas[i] = di;
 144
 145                 delta = git_patch_get_delta(patch);
 146
 147                 /* skip stats for binary data */
 148                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 149                         continue;
 150
 151                 nhunks = git_patch_num_hunks(patch);
 152                 for (j = 0; j < nhunks; j++) {
 153                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 154                                 break;
 155                         for (k = 0; ; k++) {
 156                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 157                                         break;
 158                                 if (line->old_lineno == -1) {
 159                                         di->addcount++;
 160                                         ci->addcount++;
 161                                 } else if (line->new_lineno == -1) {
 162                                         di->delcount++;
 163                                         ci->delcount++;
 164                                 }
 165                         }
 166                 }
 167         }
 168         ci->ndeltas = i;
 169         ci->filecount = i;
 170
 171         return 0;
 172
 173 err:
 174         git_diff_free(ci->diff);
 175         ci->diff = NULL;
 176         git_tree_free(ci->commit_tree);
 177         ci->commit_tree = NULL;
 178         git_tree_free(ci->parent_tree);
 179         ci->parent_tree = NULL;
 180         git_commit_free(ci->parent);
 181         ci->parent = NULL;
 182
 183         if (ci->deltas)
 184                 for (i = 0; i < ci->ndeltas; i++)
 185                         deltainfo_free(ci->deltas[i]);
 186         free(ci->deltas);
 187         ci->deltas = NULL;
 188         ci->ndeltas = 0;
 189         ci->addcount = 0;
 190         ci->delcount = 0;
 191         ci->filecount = 0;
 192
 193         return -1;
 194 }
 195
 196 void
 197 commitinfo_free(struct commitinfo *ci)
 198 {
 199         size_t i;
 200
 201         if (!ci)
 202                 return;
 203         if (ci->deltas)
 204                 for (i = 0; i < ci->ndeltas; i++)
 205                         deltainfo_free(ci->deltas[i]);
 206
 207         free(ci->deltas);
 208         git_diff_free(ci->diff);
 209         git_tree_free(ci->commit_tree);
 210         git_tree_free(ci->parent_tree);
 211         git_commit_free(ci->commit);
 212         git_commit_free(ci->parent);
 213         memset(ci, 0, sizeof(*ci));
 214         free(ci);
 215 }
 216
 217 struct commitinfo *
 218 commitinfo_getbyoid(const git_oid *id)
 219 {
 220         struct commitinfo *ci;
 221
 222         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 223                 err(1, "calloc");
 224
 225         if (git_commit_lookup(&(ci->commit), repo, id))
 226                 goto err;
 227         ci->id = id;
 228
 229         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 230         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 231
 232         ci->author = git_commit_author(ci->commit);
 233         ci->committer = git_commit_committer(ci->commit);
 234         ci->summary = git_commit_summary(ci->commit);
 235         ci->msg = git_commit_message(ci->commit);
 236
 237         return ci;
 238
 239 err:
 240         commitinfo_free(ci);
 241
 242         return NULL;
 243 }
 244
 245 FILE *
 246 efopen(const char *name, const char *flags)
 247 {
 248         FILE *fp;
 249
 250         if (!(fp = fopen(name, flags)))
 251                 err(1, "fopen: '%s'", name);
 252
 253         return fp;
 254 }
 255
 256 /* Escape characters below as HTML 2.0 / XML 1.0. */
 257 void
 258 xmlencode(FILE *fp, const char *s, size_t len)
 259 {
 260         size_t i;
 261
 262         for (i = 0; *s && i < len; s++, i++) {
 263                 switch(*s) {
 264                 case '<':  fputs("&lt;",   fp); break;
 265                 case '>':  fputs("&gt;",   fp); break;
 266                 case '\'': fputs("&#39;",  fp); break;
 267                 case '&':  fputs("&amp;",  fp); break;
 268                 case '"':  fputs("&quot;", fp); break;
 269                 default:   fputc(*s, fp);
 270                 }
 271         }
 272 }
 273
 274 int
 275 mkdirp(const char *path)
 276 {
 277         char tmp[PATH_MAX], *p;
 278
 279         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 280                 errx(1, "path truncated: '%s'", path);
 281         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 282                 if (*p != '/')
 283                         continue;
 284                 *p = '\0';
 285                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 286                         return -1;
 287                 *p = '/';
 288         }
 289         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 290                 return -1;
 291         return 0;
 292 }
 293
 294 void
 295 printtimez(FILE *fp, const git_time *intime)
 296 {
 297         struct tm *intm;
 298         time_t t;
 299         char out[32];
 300
 301         t = (time_t)intime->time;
 302         if (!(intm = gmtime(&t)))
 303                 return;
 304         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 305         fputs(out, fp);
 306 }
 307
 308 void
 309 printtime(FILE *fp, const git_time *intime)
 310 {
 311         struct tm *intm;
 312         time_t t;
 313         char out[32];
 314
 315         t = (time_t)intime->time + (intime->offset * 60);
 316         if (!(intm = gmtime(&t)))
 317                 return;
 318         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 319         if (intime->offset < 0)
 320                 fprintf(fp, "%s -%02d%02d", out,
 321                             -(intime->offset) / 60, -(intime->offset) % 60);
 322         else
 323                 fprintf(fp, "%s +%02d%02d", out,
 324                             intime->offset / 60, intime->offset % 60);
 325 }
 326
 327 void
 328 printtimeshort(FILE *fp, const git_time *intime)
 329 {
 330         struct tm *intm;
 331         time_t t;
 332         char out[32];
 333
 334         t = (time_t)intime->time;
 335         if (!(intm = gmtime(&t)))
 336                 return;
 337         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 338         fputs(out, fp);
 339 }
 340
 341 void
 342 writeheader(FILE *fp, const char *title)
 343 {
 344         fputs("<!DOCTYPE html>\n"
 345                 "<html>\n<head>\n"
 346                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 347                 "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n"
 348                 "<title>", fp);
 349         xmlencode(fp, title, strlen(title));
 350         if (title[0] && strippedname[0])
 351                 fputs(" - ", fp);
 352         xmlencode(fp, strippedname, strlen(strippedname));
 353         if (description[0])
 354                 fputs(" - ", fp);
 355         xmlencode(fp, description, strlen(description));
 356         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 357         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 358                 name, relpath);
 359         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 360         fputs("</head>\n<body>\n<table><tr><td>", fp);
 361         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 362                 relpath, relpath);
 363         fputs("</td><td><h1>", fp);
 364         xmlencode(fp, strippedname, strlen(strippedname));
 365         fputs("</h1><span class=\"desc\">", fp);
 366         xmlencode(fp, description, strlen(description));
 367         fputs("</span></td></tr>", fp);
 368         if (cloneurl[0]) {
 369                 fputs("<tr class=\"url\"><td></td><td><span class=\"clone\">git clone <a href=\"", fp);
 370                 xmlencode(fp, cloneurl, strlen(cloneurl));
 371                 fputs("\">", fp);
 372                 xmlencode(fp, cloneurl, strlen(cloneurl));
 373                 fputs("</a></span></td></tr>", fp);
 374         }
 375         fputs("<tr><td></td><td>\n", fp);
 376         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 377         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 378         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 379         if (submodules)
 380                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 381                         relpath, submodules);
 382         if (readme)
 383                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 384                         relpath, readme);
 385         if (license)
 386                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 387                         relpath, license);
 388         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 389 }
 390
 391 void
 392 writefooter(FILE *fp)
 393 {
 394         fputs("</div>\n</body>\n</html>\n", fp);
 395 }
 396
 397 void
 398 syntax_highlight(const char *fpath, FILE *fp, const char *s, size_t len)
 399 {
 400         // Ruby script for syntax highlighting.
 401         FILE *child = popen("./highlight", "w");
 402         // Give filename:
 403         fprintf(child, "%s\n", fpath);
 404         // Give code to highlight:
 405         size_t i;
 406         for (i = 0; *s && i < len; s++, i++)
 407                 fputc(*s, child);
 408
 409         // Write returned HTML to the HTML file.
 410         char c;
 411         while ((c = fgetc(child)) != EOF)
 412                 fputc(c, fp);
 413
 414         pclose(child);
 415 }
 416
 417 int
 418 writeblobhtml(const char *fpath, FILE *fp, const git_blob *blob)
 419 {
 420         size_t n = 0, i, prev;
 421         const char *s = git_blob_rawcontent(blob);
 422         git_off_t len = git_blob_rawsize(blob);
 423
 424         fputs("<div id=\"blob\">\n", fp);
 425
 426         if (len > 0) {
 427                 syntax_highlight(fpath, fp, s, len);
 428         }
 429
 430         fputs("</div>\n", fp);
 431
 432         return n;
 433 }
 434
 435 void
 436 printcommit(FILE *fp, struct commitinfo *ci)
 437 {
 438         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 439                 relpath, ci->oid, ci->oid);
 440
 441         if (ci->parentoid[0])
 442                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 443                         relpath, ci->parentoid, ci->parentoid);
 444
 445         if (ci->author) {
 446                 fputs("<b>Author:</b> ", fp);
 447                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 448                 fputs(" &lt;<a href=\"mailto:", fp);
 449                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 450                 fputs("\">", fp);
 451                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 452                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 453                 printtime(fp, &(ci->author->when));
 454                 fputc('\n', fp);
 455         }
 456         if (ci->msg) {
 457                 fputc('\n', fp);
 458                 xmlencode(fp, ci->msg, strlen(ci->msg));
 459                 fputc('\n', fp);
 460         }
 461 }
 462
 463 void
 464 printshowfile(FILE *fp, struct commitinfo *ci)
 465 {
 466         const git_diff_delta *delta;
 467         const git_diff_hunk *hunk;
 468         const git_diff_line *line;
 469         git_patch *patch;
 470         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 471         char linestr[80];
 472         int c;
 473
 474         printcommit(fp, ci);
 475
 476         if (!ci->deltas)
 477                 return;
 478
 479         if (ci->filecount > 1000   ||
 480             ci->ndeltas   > 1000   ||
 481             ci->addcount  > 100000 ||
 482             ci->delcount  > 100000) {
 483                 fputs("Diff is too large, output suppressed.\n", fp);
 484                 return;
 485         }
 486
 487         /* diff stat */
 488         fputs("<b>Diffstat:</b>\n<table>", fp);
 489         for (i = 0; i < ci->ndeltas; i++) {
 490                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 491
 492                 switch (delta->status) {
 493                 case GIT_DELTA_ADDED:      c = 'A'; break;
 494                 case GIT_DELTA_COPIED:     c = 'C'; break;
 495                 case GIT_DELTA_DELETED:    c = 'D'; break;
 496                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 497                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 498                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 499                 default:                   c = ' '; break;
 500                 }
 501                 if (c == ' ')
 502                         fprintf(fp, "<tr><td>%c", c);
 503                 else
 504                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 505
 506                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 507                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 508                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 509                         fputs(" -&gt; ", fp);
 510                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 511                 }
 512
 513                 add = ci->deltas[i]->addcount;
 514                 del = ci->deltas[i]->delcount;
 515                 changed = add + del;
 516                 total = sizeof(linestr) - 2;
 517                 if (changed > total) {
 518                         if (add)
 519                                 add = ((float)total / changed * add) + 1;
 520                         if (del)
 521                                 del = ((float)total / changed * del) + 1;
 522                 }
 523                 memset(&linestr, '+', add);
 524                 memset(&linestr[add], '-', del);
 525
 526                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 527                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 528                 fwrite(&linestr, 1, add, fp);
 529                 fputs("</span><span class=\"d\">", fp);
 530                 fwrite(&linestr[add], 1, del, fp);
 531                 fputs("</span></td></tr>\n", fp);
 532         }
 533         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 534                 ci->filecount, ci->filecount == 1 ? "" : "s",
 535                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 536                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 537
 538         fputs("<hr/>", fp);
 539
 540         for (i = 0; i < ci->ndeltas; i++) {
 541                 patch = ci->deltas[i]->patch;
 542                 delta = git_patch_get_delta(patch);
 543                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 544                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 545                 fputs(".html\">", fp);
 546                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 547                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 548                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 549                 fprintf(fp, ".html\">");
 550                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 551                 fprintf(fp, "</a></b>\n");
 552
 553                 /* check binary data */
 554                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 555                         fputs("Binary files differ.\n", fp);
 556                         continue;
 557                 }
 558
 559                 nhunks = git_patch_num_hunks(patch);
 560                 for (j = 0; j < nhunks; j++) {
 561                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 562                                 break;
 563
 564                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 565                         xmlencode(fp, hunk->header, hunk->header_len);
 566                         fputs("</a>", fp);
 567
 568                         for (k = 0; ; k++) {
 569                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 570                                         break;
 571                                 if (line->old_lineno == -1)
 572                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 573                                                 i, j, k, i, j, k);
 574                                 else if (line->new_lineno == -1)
 575                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 576                                                 i, j, k, i, j, k);
 577                                 else
 578                                         fputc(' ', fp);
 579                                 xmlencode(fp, line->content, line->content_len);
 580                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 581                                         fputs("</a>", fp);
 582                         }
 583                 }
 584         }
 585 }
 586
 587 void
 588 writelogline(FILE *fp, struct commitinfo *ci)
 589 {
 590         fputs("<tr><td>", fp);
 591         if (ci->author)
 592                 printtimeshort(fp, &(ci->author->when));
 593         fputs("</td><td>", fp);
 594         if (ci->summary) {
 595                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 596                 xmlencode(fp, ci->summary, strlen(ci->summary));
 597                 fputs("</a>", fp);
 598         }
 599         fputs("</td><td>", fp);
 600         if (ci->author)
 601                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 602         fputs("</td><td class=\"num\" align=\"right\">", fp);
 603         fprintf(fp, "%zu", ci->filecount);
 604         fputs("</td><td class=\"num\" align=\"right\">", fp);
 605         fprintf(fp, "+%zu", ci->addcount);
 606         fputs("</td><td class=\"num\" align=\"right\">", fp);
 607         fprintf(fp, "-%zu", ci->delcount);
 608         fputs("</td></tr>\n", fp);
 609 }
 610
 611 int
 612 writelog(FILE *fp, const git_oid *oid)
 613 {
 614         struct commitinfo *ci;
 615         git_revwalk *w = NULL;
 616         git_oid id;
 617         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 618         FILE *fpfile;
 619         int r;
 620
 621         git_revwalk_new(&w, repo);
 622         git_revwalk_push(w, oid);
 623         git_revwalk_simplify_first_parent(w);
 624
 625         while (!git_revwalk_next(&id, w)) {
 626                 relpath = "";
 627
 628                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 629                         break;
 630
 631                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 632                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 633                 if (r < 0 || (size_t)r >= sizeof(path))
 634                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 635                 r = access(path, F_OK);
 636
 637                 /* optimization: if there are no log lines to write and
 638                    the commit file already exists: skip the diffstat */
 639                 if (!nlogcommits && !r)
 640                         continue;
 641
 642                 if (!(ci = commitinfo_getbyoid(&id)))
 643                         break;
 644                 /* diffstat: for stagit HTML required for the log.html line */
 645                 if (commitinfo_getstats(ci) == -1)
 646                         goto err;
 647
 648                 if (nlogcommits < 0) {
 649                         writelogline(fp, ci);
 650                 } else if (nlogcommits > 0) {
 651                         writelogline(fp, ci);
 652                         nlogcommits--;
 653                         if (!nlogcommits && ci->parentoid[0])
 654                                 fputs("<tr><td></td><td colspan=\"5\">"
 655                                       "More commits remaining [...]</td>"
 656                                       "</tr>\n", fp);
 657                 }
 658
 659                 if (cachefile)
 660                         writelogline(wcachefp, ci);
 661
 662                 /* check if file exists if so skip it */
 663                 if (r) {
 664                         relpath = "../";
 665                         fpfile = efopen(path, "w");
 666                         writeheader(fpfile, ci->summary);
 667                         fputs("<pre>", fpfile);
 668                         printshowfile(fpfile, ci);
 669                         fputs("</pre>\n", fpfile);
 670                         writefooter(fpfile);
 671                         fclose(fpfile);
 672                 }
 673 err:
 674                 commitinfo_free(ci);
 675         }
 676         git_revwalk_free(w);
 677
 678         relpath = "";
 679
 680         return 0;
 681 }
 682
 683 void
 684 printcommitatom(FILE *fp, struct commitinfo *ci)
 685 {
 686         fputs("<entry>\n", fp);
 687
 688         fprintf(fp, "<id>%s</id>\n", ci->oid);
 689         if (ci->author) {
 690                 fputs("<published>", fp);
 691                 printtimez(fp, &(ci->author->when));
 692                 fputs("</published>\n", fp);
 693         }
 694         if (ci->committer) {
 695                 fputs("<updated>", fp);
 696                 printtimez(fp, &(ci->committer->when));
 697                 fputs("</updated>\n", fp);
 698         }
 699         if (ci->summary) {
 700                 fputs("<title type=\"text\">", fp);
 701                 xmlencode(fp, ci->summary, strlen(ci->summary));
 702                 fputs("</title>\n", fp);
 703         }
 704         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />\n",
 705                 ci->oid);
 706
 707         if (ci->author) {
 708                 fputs("<author>\n<name>", fp);
 709                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 710                 fputs("</name>\n<email>", fp);
 711                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 712                 fputs("</email>\n</author>\n", fp);
 713         }
 714
 715         fputs("<content type=\"text\">", fp);
 716         fprintf(fp, "commit %s\n", ci->oid);
 717         if (ci->parentoid[0])
 718                 fprintf(fp, "parent %s\n", ci->parentoid);
 719         if (ci->author) {
 720                 fputs("Author: ", fp);
 721                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 722                 fputs(" &lt;", fp);
 723                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 724                 fputs("&gt;\nDate:   ", fp);
 725                 printtime(fp, &(ci->author->when));
 726                 fputc('\n', fp);
 727         }
 728         if (ci->msg) {
 729                 fputc('\n', fp);
 730                 xmlencode(fp, ci->msg, strlen(ci->msg));
 731         }
 732         fputs("\n</content>\n</entry>\n", fp);
 733 }
 734
 735 int
 736 writeatom(FILE *fp)
 737 {
 738         struct commitinfo *ci;
 739         git_revwalk *w = NULL;
 740         git_oid id;
 741         size_t i, m = 100; /* last 'm' commits */
 742
 743         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 744               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 745         xmlencode(fp, strippedname, strlen(strippedname));
 746         fputs(", branch HEAD</title>\n<subtitle>", fp);
 747         xmlencode(fp, description, strlen(description));
 748         fputs("</subtitle>\n", fp);
 749
 750         git_revwalk_new(&w, repo);
 751         git_revwalk_push_head(w);
 752         git_revwalk_simplify_first_parent(w);
 753
 754         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 755                 if (!(ci = commitinfo_getbyoid(&id)))
 756                         break;
 757                 printcommitatom(fp, ci);
 758                 commitinfo_free(ci);
 759         }
 760         git_revwalk_free(w);
 761
 762         fputs("</feed>\n", fp);
 763
 764         return 0;
 765 }
 766
 767 int
 768 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 769 {
 770         char tmp[PATH_MAX] = "", *d;
 771         const char *p;
 772         int lc = 0;
 773         FILE *fp;
 774
 775         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 776                 errx(1, "path truncated: '%s'", fpath);
 777         if (!(d = dirname(tmp)))
 778                 err(1, "dirname");
 779         if (mkdirp(d))
 780                 return -1;
 781
 782         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 783                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 784                         errx(1, "path truncated: '../%s'", tmp);
 785         }
 786         relpath = tmp;
 787
 788         fp = efopen(fpath, "w");
 789         writeheader(fp, filename);
 790         fputs("<p> ", fp);
 791         xmlencode(fp, filename, strlen(filename));
 792         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 793         fputs("</p><hr/>", fp);
 794
 795         if (git_blob_is_binary((git_blob *)obj)) {
 796                 fputs("<p>Binary file.</p>\n", fp);
 797         } else {
 798                 lc = writeblobhtml(fpath, fp, (git_blob *)obj);
 799                 if (ferror(fp))
 800                         err(1, "fwrite");
 801         }
 802         writefooter(fp);
 803         fclose(fp);
 804
 805         relpath = "";
 806
 807         return lc;
 808 }
 809
 810 const char *
 811 filemode(git_filemode_t m)
 812 {
 813         static char mode[11];
 814
 815         memset(mode, '-', sizeof(mode) - 1);
 816         mode[10] = '\0';
 817
 818         if (S_ISREG(m))
 819                 mode[0] = '-';
 820         else if (S_ISBLK(m))
 821                 mode[0] = 'b';
 822         else if (S_ISCHR(m))
 823                 mode[0] = 'c';
 824         else if (S_ISDIR(m))
 825                 mode[0] = 'd';
 826         else if (S_ISFIFO(m))
 827                 mode[0] = 'p';
 828         else if (S_ISLNK(m))
 829                 mode[0] = 'l';
 830         else if (S_ISSOCK(m))
 831                 mode[0] = 's';
 832         else
 833                 mode[0] = '?';
 834
 835         if (m & S_IRUSR) mode[1] = 'r';
 836         if (m & S_IWUSR) mode[2] = 'w';
 837         if (m & S_IXUSR) mode[3] = 'x';
 838         if (m & S_IRGRP) mode[4] = 'r';
 839         if (m & S_IWGRP) mode[5] = 'w';
 840         if (m & S_IXGRP) mode[6] = 'x';
 841         if (m & S_IROTH) mode[7] = 'r';
 842         if (m & S_IWOTH) mode[8] = 'w';
 843         if (m & S_IXOTH) mode[9] = 'x';
 844
 845         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 846         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 847         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 848
 849         return mode;
 850 }
 851
 852 int
 853 writefilestree(FILE *fp, git_tree *tree, const char *path)
 854 {
 855         const git_tree_entry *entry = NULL;
 856         git_submodule *module = NULL;
 857         git_object *obj = NULL;
 858         git_off_t filesize;
 859         const char *entryname;
 860         char filepath[PATH_MAX], entrypath[PATH_MAX];
 861         size_t count, i;
 862         int lc, r, ret;
 863
 864         count = git_tree_entrycount(tree);
 865         for (i = 0; i < count; i++) {
 866                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 867                     !(entryname = git_tree_entry_name(entry)))
 868                         return -1;
 869                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 870
 871                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 872                          entrypath);
 873                 if (r < 0 || (size_t)r >= sizeof(filepath))
 874                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 875
 876                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 877                         switch (git_object_type(obj)) {
 878                         case GIT_OBJ_BLOB:
 879                                 break;
 880                         case GIT_OBJ_TREE:
 881                                 /* NOTE: recurses */
 882                                 ret = writefilestree(fp, (git_tree *)obj,
 883                                                      entrypath);
 884                                 git_object_free(obj);
 885                                 if (ret)
 886                                         return ret;
 887                                 continue;
 888                         default:
 889                                 git_object_free(obj);
 890                                 continue;
 891                         }
 892
 893                         filesize = git_blob_rawsize((git_blob *)obj);
 894                         lc = writeblob(obj, filepath, entryname, filesize);
 895
 896                         fputs("<tr><td>", fp);
 897                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 898                         fprintf(fp, "</td><td><a href=\"%s", relpath);
 899                         xmlencode(fp, filepath, strlen(filepath));
 900                         fputs("\">", fp);
 901                         xmlencode(fp, entrypath, strlen(entrypath));
 902                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 903                         if (lc > 0)
 904                                 fprintf(fp, "%dL", lc);
 905                         else
 906                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 907                         fputs("</td></tr>\n", fp);
 908                         git_object_free(obj);
 909                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 910                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 911                                 relpath);
 912                         xmlencode(fp, entrypath, strlen(entrypath));
 913                         git_submodule_free(module);
 914                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 915                 }
 916         }
 917
 918         return 0;
 919 }
 920
 921 int
 922 writefiles(FILE *fp, const git_oid *id)
 923 {
 924         git_tree *tree = NULL;
 925         git_commit *commit = NULL;
 926         int ret = -1;
 927
 928         fputs("<table id=\"files\"><thead>\n<tr>"
 929               "<td><b>Mode</b></td><td><b>Name</b></td>"
 930               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 931               "</tr>\n</thead><tbody>\n", fp);
 932
 933         if (!git_commit_lookup(&commit, repo, id) &&
 934             !git_commit_tree(&tree, commit))
 935                 ret = writefilestree(fp, tree, "");
 936
 937         fputs("</tbody></table>", fp);
 938
 939         git_commit_free(commit);
 940         git_tree_free(tree);
 941
 942         return ret;
 943 }
 944
 945 int
 946 refs_cmp(const void *v1, const void *v2)
 947 {
 948         git_reference *r1 = (*(git_reference **)v1);
 949         git_reference *r2 = (*(git_reference **)v2);
 950         int r;
 951
 952         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 953                 return r;
 954
 955         return strcmp(git_reference_shorthand(r1),
 956                       git_reference_shorthand(r2));
 957 }
 958
 959 int
 960 writerefs(FILE *fp)
 961 {
 962         struct commitinfo *ci;
 963         const git_oid *id = NULL;
 964         git_object *obj = NULL;
 965         git_reference *dref = NULL, *r, *ref = NULL;
 966         git_reference_iterator *it = NULL;
 967         git_reference **refs = NULL;
 968         size_t count, i, j, refcount;
 969         const char *titles[] = { "Branches", "Tags" };
 970         const char *ids[] = { "branches", "tags" };
 971         const char *name;
 972
 973         if (git_reference_iterator_new(&it, repo))
 974                 return -1;
 975
 976         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 977                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 978                         err(1, "realloc");
 979                 refs[refcount] = ref;
 980         }
 981         git_reference_iterator_free(it);
 982
 983         /* sort by type then shorthand name */
 984         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 985
 986         for (j = 0; j < 2; j++) {
 987                 for (i = 0, count = 0; i < refcount; i++) {
 988                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 989                             !(git_reference_is_tag(refs[i]) && j == 1))
 990                                 continue;
 991
 992                         switch (git_reference_type(refs[i])) {
 993                         case GIT_REF_SYMBOLIC:
 994                                 if (git_reference_resolve(&dref, refs[i]))
 995                                         goto err;
 996                                 r = dref;
 997                                 break;
 998                         case GIT_REF_OID:
 999                                 r = refs[i];
1000                                 break;
1001                         default:
1002                                 continue;
1003                         }
1004                         if (!git_reference_target(r) ||
1005                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1006                                 goto err;
1007                         if (!(id = git_object_id(obj)))
1008                                 goto err;
1009                         if (!(ci = commitinfo_getbyoid(id)))
1010                                 break;
1011
1012                         /* print header if it has an entry (first). */
1013                         if (++count == 1) {
1014                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1015                                         "<thead>\n<tr><td><b>Name</b></td>"
1016                                         "<td><b>Last commit date</b></td>"
1017                                         "<td><b>Author</b></td>\n</tr>\n"
1018                                         "</thead><tbody>\n",
1019                                          titles[j], ids[j]);
1020                         }
1021
1022                         relpath = "";
1023                         name = git_reference_shorthand(r);
1024
1025                         fputs("<tr><td>", fp);
1026                         xmlencode(fp, name, strlen(name));
1027                         fputs("</td><td>", fp);
1028                         if (ci->author)
1029                                 printtimeshort(fp, &(ci->author->when));
1030                         fputs("</td><td>", fp);
1031                         if (ci->author)
1032                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1033                         fputs("</td></tr>\n", fp);
1034
1035                         relpath = "../";
1036
1037                         commitinfo_free(ci);
1038                         git_object_free(obj);
1039                         obj = NULL;
1040                         git_reference_free(dref);
1041                         dref = NULL;
1042                 }
1043                 /* table footer */
1044                 if (count)
1045                         fputs("</tbody></table><br/>", fp);
1046         }
1047
1048 err:
1049         git_object_free(obj);
1050         git_reference_free(dref);
1051
1052         for (i = 0; i < refcount; i++)
1053                 git_reference_free(refs[i]);
1054         free(refs);
1055
1056         return 0;
1057 }
1058
1059 void
1060 usage(char *argv0)
1061 {
1062         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1063         exit(1);
1064 }
1065
1066 int
1067 main(int argc, char *argv[])
1068 {
1069         git_object *obj = NULL;
1070         const git_oid *head = NULL;
1071         mode_t mask;
1072         FILE *fp, *fpread;
1073         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1074         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1075         size_t n;
1076         int i, fd;
1077
1078         for (i = 1; i < argc; i++) {
1079                 if (argv[i][0] != '-') {
1080                         if (repodir)
1081                                 usage(argv[0]);
1082                         repodir = argv[i];
1083                 } else if (argv[i][1] == 'c') {
1084                         if (nlogcommits > 0 || i + 1 >= argc)
1085                                 usage(argv[0]);
1086                         cachefile = argv[++i];
1087                 } else if (argv[i][1] == 'l') {
1088                         if (cachefile || i + 1 >= argc)
1089                                 usage(argv[0]);
1090                         errno = 0;
1091                         nlogcommits = strtoll(argv[++i], &p, 10);
1092                         if (argv[i][0] == '\0' || *p != '\0' ||
1093                             nlogcommits <= 0 || errno)
1094                                 usage(argv[0]);
1095                 }
1096         }
1097         if (!repodir)
1098                 usage(argv[0]);
1099
1100         if (!realpath(repodir, repodirabs))
1101                 err(1, "realpath");
1102
1103         git_libgit2_init();
1104
1105 #ifdef __OpenBSD__
1106         if (unveil(repodir, "r") == -1)
1107                 err(1, "unveil: %s", repodir);
1108         if (unveil(".", "rwc") == -1)
1109                 err(1, "unveil: .");
1110         if (cachefile && unveil(cachefile, "rwc") == -1)
1111                 err(1, "unveil: %s", cachefile);
1112
1113         if (cachefile) {
1114                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1115                         err(1, "pledge");
1116         } else {
1117                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1118                         err(1, "pledge");
1119         }
1120 #endif
1121
1122         if (git_repository_open_ext(&repo, repodir,
1123                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1124                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1125                 return 1;
1126         }
1127
1128         /* find HEAD */
1129         if (!git_revparse_single(&obj, repo, "HEAD"))
1130                 head = git_object_id(obj);
1131         git_object_free(obj);
1132
1133         /* use directory name as name */
1134         if ((name = strrchr(repodirabs, '/')))
1135                 name++;
1136         else
1137                 name = "";
1138
1139         /* strip .git suffix */
1140         if (!(strippedname = strdup(name)))
1141                 err(1, "strdup");
1142         if ((p = strrchr(strippedname, '.')))
1143                 if (!strcmp(p, ".git"))
1144                         *p = '\0';
1145
1146         /* read description or .git/description */
1147         joinpath(path, sizeof(path), repodir, "description");
1148         if (!(fpread = fopen(path, "r"))) {
1149                 joinpath(path, sizeof(path), repodir, ".git/description");
1150                 fpread = fopen(path, "r");
1151         }
1152         if (fpread) {
1153                 if (!fgets(description, sizeof(description), fpread))
1154                         description[0] = '\0';
1155                 fclose(fpread);
1156         }
1157
1158         /* read url or .git/url */
1159         joinpath(path, sizeof(path), repodir, "url");
1160         if (!(fpread = fopen(path, "r"))) {
1161                 joinpath(path, sizeof(path), repodir, ".git/url");
1162                 fpread = fopen(path, "r");
1163         }
1164         if (fpread) {
1165                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1166                         cloneurl[0] = '\0';
1167                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1168                 fclose(fpread);
1169         }
1170
1171         /* check LICENSE */
1172         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1173                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1174                     git_object_type(obj) == GIT_OBJ_BLOB)
1175                         license = licensefiles[i] + strlen("HEAD:");
1176                 git_object_free(obj);
1177         }
1178
1179         /* check README */
1180         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1181                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1182                     git_object_type(obj) == GIT_OBJ_BLOB)
1183                         readme = readmefiles[i] + strlen("HEAD:");
1184                 git_object_free(obj);
1185         }
1186
1187         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1188             git_object_type(obj) == GIT_OBJ_BLOB)
1189                 submodules = ".gitmodules";
1190         git_object_free(obj);
1191
1192         /* log for HEAD */
1193         fp = efopen("log.html", "w");
1194         relpath = "";
1195         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1196         writeheader(fp, "Log");
1197         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1198               "<td><b>Commit</b></td>"
1199               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1200               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1201               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1202
1203         if (cachefile && head) {
1204                 /* read from cache file (does not need to exist) */
1205                 if ((rcachefp = fopen(cachefile, "r"))) {
1206                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1207                                 errx(1, "%s: no object id", cachefile);
1208                         if (git_oid_fromstr(&lastoid, lastoidstr))
1209                                 errx(1, "%s: invalid object id", cachefile);
1210                 }
1211
1212                 /* write log to (temporary) cache */
1213                 if ((fd = mkstemp(tmppath)) == -1)
1214                         err(1, "mkstemp");
1215                 if (!(wcachefp = fdopen(fd, "w")))
1216                         err(1, "fdopen: '%s'", tmppath);
1217                 /* write last commit id (HEAD) */
1218                 git_oid_tostr(buf, sizeof(buf), head);
1219                 fprintf(wcachefp, "%s\n", buf);
1220
1221                 writelog(fp, head);
1222
1223                 if (rcachefp) {
1224                         /* append previous log to log.html and the new cache */
1225                         while (!feof(rcachefp)) {
1226                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1227                                 if (ferror(rcachefp))
1228                                         err(1, "fread");
1229                                 if (fwrite(buf, 1, n, fp) != n ||
1230                                     fwrite(buf, 1, n, wcachefp) != n)
1231                                         err(1, "fwrite");
1232                         }
1233                         fclose(rcachefp);
1234                 }
1235                 fclose(wcachefp);
1236         } else {
1237                 if (head)
1238                         writelog(fp, head);
1239         }
1240
1241         fputs("</tbody></table>", fp);
1242         writefooter(fp);
1243         fclose(fp);
1244
1245         /* files for HEAD */
1246         fp = efopen("files.html", "w");
1247         writeheader(fp, "Files");
1248         if (head)
1249                 writefiles(fp, head);
1250         writefooter(fp);
1251         fclose(fp);
1252
1253         /* summary page with branches and tags */
1254         fp = efopen("refs.html", "w");
1255         writeheader(fp, "Refs");
1256         writerefs(fp);
1257         writefooter(fp);
1258         fclose(fp);
1259
1260         /* Atom feed */
1261         fp = efopen("atom.xml", "w");
1262         writeatom(fp);
1263         fclose(fp);
1264
1265         /* rename new cache file on success */
1266         if (cachefile && head) {
1267                 if (rename(tmppath, cachefile))
1268                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1269                 umask((mask = umask(0)));
1270                 if (chmod(cachefile,
1271                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1272                         err(1, "chmod: '%s'", cachefile);
1273         }
1274
1275         /* cleanup */
1276         git_repository_free(repo);
1277         git_libgit2_shutdown();
1278
1279         return 0;
1280 }