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 int
 398 syntax_highlight(const char *filename, 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", filename);
 404         // Give code to highlight:
 405         int lc;
 406         size_t i;
 407         for (i = 0; *s && i < len; s++, i++) {
 408                 if (*s == '\n') lc++;
 409                 fputc(*s, child);
 410         }
 411
 412         // Write returned HTML to the HTML file.
 413         char c;
 414         while ((c = fgetc(child)) != EOF)
 415                 fputc(c, fp);
 416
 417         pclose(child);
 418         return lc;
 419 }
 420
 421 int
 422 writeblobhtml(const char *filename, FILE *fp, const git_blob *blob)
 423 {
 424         int lc = 0;
 425         const char *s = git_blob_rawcontent(blob);
 426         git_off_t len = git_blob_rawsize(blob);
 427
 428         fputs("<div id=\"blob\">\n", fp);
 429
 430         if (len > 0) {
 431                 lc = syntax_highlight(filename, fp, s, len);
 432         }
 433
 434         fputs("</div>\n", fp);
 435
 436         return lc;
 437 }
 438
 439 void
 440 printcommit(FILE *fp, struct commitinfo *ci)
 441 {
 442         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 443                 relpath, ci->oid, ci->oid);
 444
 445         if (ci->parentoid[0])
 446                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 447                         relpath, ci->parentoid, ci->parentoid);
 448
 449         if (ci->author) {
 450                 fputs("<b>Author:</b> ", fp);
 451                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 452                 fputs(" &lt;<a href=\"mailto:", fp);
 453                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 454                 fputs("\">", fp);
 455                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 456                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 457                 printtime(fp, &(ci->author->when));
 458                 fputc('\n', fp);
 459         }
 460         if (ci->msg) {
 461                 fputc('\n', fp);
 462                 xmlencode(fp, ci->msg, strlen(ci->msg));
 463                 fputc('\n', fp);
 464         }
 465 }
 466
 467 void
 468 printshowfile(FILE *fp, struct commitinfo *ci)
 469 {
 470         const git_diff_delta *delta;
 471         const git_diff_hunk *hunk;
 472         const git_diff_line *line;
 473         git_patch *patch;
 474         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 475         char linestr[80];
 476         int c;
 477
 478         printcommit(fp, ci);
 479
 480         if (!ci->deltas)
 481                 return;
 482
 483         if (ci->filecount > 1000   ||
 484             ci->ndeltas   > 1000   ||
 485             ci->addcount  > 100000 ||
 486             ci->delcount  > 100000) {
 487                 fputs("Diff is too large, output suppressed.\n", fp);
 488                 return;
 489         }
 490
 491         /* diff stat */
 492         fputs("<b>Diffstat:</b>\n<table>", fp);
 493         for (i = 0; i < ci->ndeltas; i++) {
 494                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 495
 496                 switch (delta->status) {
 497                 case GIT_DELTA_ADDED:      c = 'A'; break;
 498                 case GIT_DELTA_COPIED:     c = 'C'; break;
 499                 case GIT_DELTA_DELETED:    c = 'D'; break;
 500                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 501                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 502                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 503                 default:                   c = ' '; break;
 504                 }
 505                 if (c == ' ')
 506                         fprintf(fp, "<tr><td>%c", c);
 507                 else
 508                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 509
 510                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 511                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 512                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 513                         fputs(" -&gt; ", fp);
 514                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 515                 }
 516
 517                 add = ci->deltas[i]->addcount;
 518                 del = ci->deltas[i]->delcount;
 519                 changed = add + del;
 520                 total = sizeof(linestr) - 2;
 521                 if (changed > total) {
 522                         if (add)
 523                                 add = ((float)total / changed * add) + 1;
 524                         if (del)
 525                                 del = ((float)total / changed * del) + 1;
 526                 }
 527                 memset(&linestr, '+', add);
 528                 memset(&linestr[add], '-', del);
 529
 530                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 531                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 532                 fwrite(&linestr, 1, add, fp);
 533                 fputs("</span><span class=\"d\">", fp);
 534                 fwrite(&linestr[add], 1, del, fp);
 535                 fputs("</span></td></tr>\n", fp);
 536         }
 537         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 538                 ci->filecount, ci->filecount == 1 ? "" : "s",
 539                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 540                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 541
 542         fputs("<hr/>", fp);
 543
 544         for (i = 0; i < ci->ndeltas; i++) {
 545                 patch = ci->deltas[i]->patch;
 546                 delta = git_patch_get_delta(patch);
 547                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 548                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 549                 fputs(".html\">", fp);
 550                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 551                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 552                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 553                 fprintf(fp, ".html\">");
 554                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 555                 fprintf(fp, "</a></b>\n");
 556
 557                 /* check binary data */
 558                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 559                         fputs("Binary files differ.\n", fp);
 560                         continue;
 561                 }
 562
 563                 nhunks = git_patch_num_hunks(patch);
 564                 for (j = 0; j < nhunks; j++) {
 565                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 566                                 break;
 567
 568                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 569                         xmlencode(fp, hunk->header, hunk->header_len);
 570                         fputs("</a>", fp);
 571
 572                         for (k = 0; ; k++) {
 573                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 574                                         break;
 575                                 if (line->old_lineno == -1)
 576                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 577                                                 i, j, k, i, j, k);
 578                                 else if (line->new_lineno == -1)
 579                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 580                                                 i, j, k, i, j, k);
 581                                 else
 582                                         fputc(' ', fp);
 583                                 xmlencode(fp, line->content, line->content_len);
 584                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 585                                         fputs("</a>", fp);
 586                         }
 587                 }
 588         }
 589 }
 590
 591 void
 592 writelogline(FILE *fp, struct commitinfo *ci)
 593 {
 594         fputs("<tr><td>", fp);
 595         if (ci->author)
 596                 printtimeshort(fp, &(ci->author->when));
 597         fputs("</td><td>", fp);
 598         if (ci->summary) {
 599                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 600                 xmlencode(fp, ci->summary, strlen(ci->summary));
 601                 fputs("</a>", fp);
 602         }
 603         fputs("</td><td>", fp);
 604         if (ci->author)
 605                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 606         fputs("</td><td class=\"num\" align=\"right\">", fp);
 607         fprintf(fp, "%zu", ci->filecount);
 608         fputs("</td><td class=\"num\" align=\"right\">", fp);
 609         fprintf(fp, "+%zu", ci->addcount);
 610         fputs("</td><td class=\"num\" align=\"right\">", fp);
 611         fprintf(fp, "-%zu", ci->delcount);
 612         fputs("</td></tr>\n", fp);
 613 }
 614
 615 int
 616 writelog(FILE *fp, const git_oid *oid)
 617 {
 618         struct commitinfo *ci;
 619         git_revwalk *w = NULL;
 620         git_oid id;
 621         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 622         FILE *fpfile;
 623         int r;
 624
 625         git_revwalk_new(&w, repo);
 626         git_revwalk_push(w, oid);
 627         git_revwalk_simplify_first_parent(w);
 628
 629         while (!git_revwalk_next(&id, w)) {
 630                 relpath = "";
 631
 632                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 633                         break;
 634
 635                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 636                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 637                 if (r < 0 || (size_t)r >= sizeof(path))
 638                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 639                 r = access(path, F_OK);
 640
 641                 /* optimization: if there are no log lines to write and
 642                    the commit file already exists: skip the diffstat */
 643                 if (!nlogcommits && !r)
 644                         continue;
 645
 646                 if (!(ci = commitinfo_getbyoid(&id)))
 647                         break;
 648                 /* diffstat: for stagit HTML required for the log.html line */
 649                 if (commitinfo_getstats(ci) == -1)
 650                         goto err;
 651
 652                 if (nlogcommits < 0) {
 653                         writelogline(fp, ci);
 654                 } else if (nlogcommits > 0) {
 655                         writelogline(fp, ci);
 656                         nlogcommits--;
 657                         if (!nlogcommits && ci->parentoid[0])
 658                                 fputs("<tr><td></td><td colspan=\"5\">"
 659                                       "More commits remaining [...]</td>"
 660                                       "</tr>\n", fp);
 661                 }
 662
 663                 if (cachefile)
 664                         writelogline(wcachefp, ci);
 665
 666                 /* check if file exists if so skip it */
 667                 if (r) {
 668                         relpath = "../";
 669                         fpfile = efopen(path, "w");
 670                         writeheader(fpfile, ci->summary);
 671                         fputs("<pre>", fpfile);
 672                         printshowfile(fpfile, ci);
 673                         fputs("</pre>\n", fpfile);
 674                         writefooter(fpfile);
 675                         fclose(fpfile);
 676                 }
 677 err:
 678                 commitinfo_free(ci);
 679         }
 680         git_revwalk_free(w);
 681
 682         relpath = "";
 683
 684         return 0;
 685 }
 686
 687 void
 688 printcommitatom(FILE *fp, struct commitinfo *ci)
 689 {
 690         fputs("<entry>\n", fp);
 691
 692         fprintf(fp, "<id>%s</id>\n", ci->oid);
 693         if (ci->author) {
 694                 fputs("<published>", fp);
 695                 printtimez(fp, &(ci->author->when));
 696                 fputs("</published>\n", fp);
 697         }
 698         if (ci->committer) {
 699                 fputs("<updated>", fp);
 700                 printtimez(fp, &(ci->committer->when));
 701                 fputs("</updated>\n", fp);
 702         }
 703         if (ci->summary) {
 704                 fputs("<title type=\"text\">", fp);
 705                 xmlencode(fp, ci->summary, strlen(ci->summary));
 706                 fputs("</title>\n", fp);
 707         }
 708         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />\n",
 709                 ci->oid);
 710
 711         if (ci->author) {
 712                 fputs("<author>\n<name>", fp);
 713                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 714                 fputs("</name>\n<email>", fp);
 715                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 716                 fputs("</email>\n</author>\n", fp);
 717         }
 718
 719         fputs("<content type=\"text\">", fp);
 720         fprintf(fp, "commit %s\n", ci->oid);
 721         if (ci->parentoid[0])
 722                 fprintf(fp, "parent %s\n", ci->parentoid);
 723         if (ci->author) {
 724                 fputs("Author: ", fp);
 725                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 726                 fputs(" &lt;", fp);
 727                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 728                 fputs("&gt;\nDate:   ", fp);
 729                 printtime(fp, &(ci->author->when));
 730                 fputc('\n', fp);
 731         }
 732         if (ci->msg) {
 733                 fputc('\n', fp);
 734                 xmlencode(fp, ci->msg, strlen(ci->msg));
 735         }
 736         fputs("\n</content>\n</entry>\n", fp);
 737 }
 738
 739 int
 740 writeatom(FILE *fp)
 741 {
 742         struct commitinfo *ci;
 743         git_revwalk *w = NULL;
 744         git_oid id;
 745         size_t i, m = 100; /* last 'm' commits */
 746
 747         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 748               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 749         xmlencode(fp, strippedname, strlen(strippedname));
 750         fputs(", branch HEAD</title>\n<subtitle>", fp);
 751         xmlencode(fp, description, strlen(description));
 752         fputs("</subtitle>\n", fp);
 753
 754         git_revwalk_new(&w, repo);
 755         git_revwalk_push_head(w);
 756         git_revwalk_simplify_first_parent(w);
 757
 758         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 759                 if (!(ci = commitinfo_getbyoid(&id)))
 760                         break;
 761                 printcommitatom(fp, ci);
 762                 commitinfo_free(ci);
 763         }
 764         git_revwalk_free(w);
 765
 766         fputs("</feed>\n", fp);
 767
 768         return 0;
 769 }
 770
 771 int
 772 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 773 {
 774         char tmp[PATH_MAX] = "", *d;
 775         const char *p;
 776         int lc = 0;
 777         FILE *fp;
 778
 779         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 780                 errx(1, "path truncated: '%s'", fpath);
 781         if (!(d = dirname(tmp)))
 782                 err(1, "dirname");
 783         if (mkdirp(d))
 784                 return -1;
 785
 786         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 787                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 788                         errx(1, "path truncated: '../%s'", tmp);
 789         }
 790         relpath = tmp;
 791
 792         fp = efopen(fpath, "w");
 793         writeheader(fp, filename);
 794         fputs("<p> ", fp);
 795         xmlencode(fp, filename, strlen(filename));
 796         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 797         fputs("</p><hr/>", fp);
 798
 799         if (git_blob_is_binary((git_blob *)obj)) {
 800                 fputs("<p>Binary file.</p>\n", fp);
 801         } else {
 802                 lc = writeblobhtml(fpath, fp, (git_blob *)obj);
 803                 if (ferror(fp))
 804                         err(1, "fwrite");
 805         }
 806         writefooter(fp);
 807         fclose(fp);
 808
 809         relpath = "";
 810
 811         return lc;
 812 }
 813
 814 const char *
 815 filemode(git_filemode_t m)
 816 {
 817         static char mode[11];
 818
 819         memset(mode, '-', sizeof(mode) - 1);
 820         mode[10] = '\0';
 821
 822         if (S_ISREG(m))
 823                 mode[0] = '-';
 824         else if (S_ISBLK(m))
 825                 mode[0] = 'b';
 826         else if (S_ISCHR(m))
 827                 mode[0] = 'c';
 828         else if (S_ISDIR(m))
 829                 mode[0] = 'd';
 830         else if (S_ISFIFO(m))
 831                 mode[0] = 'p';
 832         else if (S_ISLNK(m))
 833                 mode[0] = 'l';
 834         else if (S_ISSOCK(m))
 835                 mode[0] = 's';
 836         else
 837                 mode[0] = '?';
 838
 839         if (m & S_IRUSR) mode[1] = 'r';
 840         if (m & S_IWUSR) mode[2] = 'w';
 841         if (m & S_IXUSR) mode[3] = 'x';
 842         if (m & S_IRGRP) mode[4] = 'r';
 843         if (m & S_IWGRP) mode[5] = 'w';
 844         if (m & S_IXGRP) mode[6] = 'x';
 845         if (m & S_IROTH) mode[7] = 'r';
 846         if (m & S_IWOTH) mode[8] = 'w';
 847         if (m & S_IXOTH) mode[9] = 'x';
 848
 849         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 850         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 851         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 852
 853         return mode;
 854 }
 855
 856 int
 857 writefilestree(FILE *fp, git_tree *tree, const char *path)
 858 {
 859         const git_tree_entry *entry = NULL;
 860         git_submodule *module = NULL;
 861         git_object *obj = NULL;
 862         git_off_t filesize;
 863         const char *entryname;
 864         char filepath[PATH_MAX], entrypath[PATH_MAX];
 865         size_t count, i;
 866         int lc, r, ret;
 867
 868         count = git_tree_entrycount(tree);
 869         for (i = 0; i < count; i++) {
 870                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 871                     !(entryname = git_tree_entry_name(entry)))
 872                         return -1;
 873                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 874
 875                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 876                          entrypath);
 877                 if (r < 0 || (size_t)r >= sizeof(filepath))
 878                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 879
 880                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 881                         switch (git_object_type(obj)) {
 882                         case GIT_OBJ_BLOB:
 883                                 break;
 884                         case GIT_OBJ_TREE:
 885                                 /* NOTE: recurses */
 886                                 ret = writefilestree(fp, (git_tree *)obj,
 887                                                      entrypath);
 888                                 git_object_free(obj);
 889                                 if (ret)
 890                                         return ret;
 891                                 continue;
 892                         default:
 893                                 git_object_free(obj);
 894                                 continue;
 895                         }
 896
 897                         filesize = git_blob_rawsize((git_blob *)obj);
 898                         lc = writeblob(obj, filepath, entryname, filesize);
 899
 900                         fputs("<tr><td>", fp);
 901                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 902                         fprintf(fp, "</td><td><a href=\"%s", relpath);
 903                         xmlencode(fp, filepath, strlen(filepath));
 904                         fputs("\">", fp);
 905                         xmlencode(fp, entrypath, strlen(entrypath));
 906                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 907                         if (lc > 0)
 908                                 fprintf(fp, "%dL", lc);
 909                         else
 910                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 911                         fputs("</td></tr>\n", fp);
 912                         git_object_free(obj);
 913                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 914                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 915                                 relpath);
 916                         xmlencode(fp, entrypath, strlen(entrypath));
 917                         git_submodule_free(module);
 918                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 919                 }
 920         }
 921
 922         return 0;
 923 }
 924
 925 int
 926 writefiles(FILE *fp, const git_oid *id)
 927 {
 928         git_tree *tree = NULL;
 929         git_commit *commit = NULL;
 930         int ret = -1;
 931
 932         fputs("<table id=\"files\"><thead>\n<tr>"
 933               "<td><b>Mode</b></td><td><b>Name</b></td>"
 934               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 935               "</tr>\n</thead><tbody>\n", fp);
 936
 937         if (!git_commit_lookup(&commit, repo, id) &&
 938             !git_commit_tree(&tree, commit))
 939                 ret = writefilestree(fp, tree, "");
 940
 941         fputs("</tbody></table>", fp);
 942
 943         git_commit_free(commit);
 944         git_tree_free(tree);
 945
 946         return ret;
 947 }
 948
 949 int
 950 refs_cmp(const void *v1, const void *v2)
 951 {
 952         git_reference *r1 = (*(git_reference **)v1);
 953         git_reference *r2 = (*(git_reference **)v2);
 954         int r;
 955
 956         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 957                 return r;
 958
 959         return strcmp(git_reference_shorthand(r1),
 960                       git_reference_shorthand(r2));
 961 }
 962
 963 int
 964 writerefs(FILE *fp)
 965 {
 966         struct commitinfo *ci;
 967         const git_oid *id = NULL;
 968         git_object *obj = NULL;
 969         git_reference *dref = NULL, *r, *ref = NULL;
 970         git_reference_iterator *it = NULL;
 971         git_reference **refs = NULL;
 972         size_t count, i, j, refcount;
 973         const char *titles[] = { "Branches", "Tags" };
 974         const char *ids[] = { "branches", "tags" };
 975         const char *name;
 976
 977         if (git_reference_iterator_new(&it, repo))
 978                 return -1;
 979
 980         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 981                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 982                         err(1, "realloc");
 983                 refs[refcount] = ref;
 984         }
 985         git_reference_iterator_free(it);
 986
 987         /* sort by type then shorthand name */
 988         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 989
 990         for (j = 0; j < 2; j++) {
 991                 for (i = 0, count = 0; i < refcount; i++) {
 992                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 993                             !(git_reference_is_tag(refs[i]) && j == 1))
 994                                 continue;
 995
 996                         switch (git_reference_type(refs[i])) {
 997                         case GIT_REF_SYMBOLIC:
 998                                 if (git_reference_resolve(&dref, refs[i]))
 999                                         goto err;
1000                                 r = dref;
1001                                 break;
1002                         case GIT_REF_OID:
1003                                 r = refs[i];
1004                                 break;
1005                         default:
1006                                 continue;
1007                         }
1008                         if (!git_reference_target(r) ||
1009                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1010                                 goto err;
1011                         if (!(id = git_object_id(obj)))
1012                                 goto err;
1013                         if (!(ci = commitinfo_getbyoid(id)))
1014                                 break;
1015
1016                         /* print header if it has an entry (first). */
1017                         if (++count == 1) {
1018                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1019                                         "<thead>\n<tr><td><b>Name</b></td>"
1020                                         "<td><b>Last commit date</b></td>"
1021                                         "<td><b>Author</b></td>\n</tr>\n"
1022                                         "</thead><tbody>\n",
1023                                          titles[j], ids[j]);
1024                         }
1025
1026                         relpath = "";
1027                         name = git_reference_shorthand(r);
1028
1029                         fputs("<tr><td>", fp);
1030                         xmlencode(fp, name, strlen(name));
1031                         fputs("</td><td>", fp);
1032                         if (ci->author)
1033                                 printtimeshort(fp, &(ci->author->when));
1034                         fputs("</td><td>", fp);
1035                         if (ci->author)
1036                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1037                         fputs("</td></tr>\n", fp);
1038
1039                         relpath = "../";
1040
1041                         commitinfo_free(ci);
1042                         git_object_free(obj);
1043                         obj = NULL;
1044                         git_reference_free(dref);
1045                         dref = NULL;
1046                 }
1047                 /* table footer */
1048                 if (count)
1049                         fputs("</tbody></table><br/>", fp);
1050         }
1051
1052 err:
1053         git_object_free(obj);
1054         git_reference_free(dref);
1055
1056         for (i = 0; i < refcount; i++)
1057                 git_reference_free(refs[i]);
1058         free(refs);
1059
1060         return 0;
1061 }
1062
1063 void
1064 usage(char *argv0)
1065 {
1066         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1067         exit(1);
1068 }
1069
1070 int
1071 main(int argc, char *argv[])
1072 {
1073         git_object *obj = NULL;
1074         const git_oid *head = NULL;
1075         mode_t mask;
1076         FILE *fp, *fpread;
1077         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1078         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1079         size_t n;
1080         int i, fd;
1081
1082         for (i = 1; i < argc; i++) {
1083                 if (argv[i][0] != '-') {
1084                         if (repodir)
1085                                 usage(argv[0]);
1086                         repodir = argv[i];
1087                 } else if (argv[i][1] == 'c') {
1088                         if (nlogcommits > 0 || i + 1 >= argc)
1089                                 usage(argv[0]);
1090                         cachefile = argv[++i];
1091                 } else if (argv[i][1] == 'l') {
1092                         if (cachefile || i + 1 >= argc)
1093                                 usage(argv[0]);
1094                         errno = 0;
1095                         nlogcommits = strtoll(argv[++i], &p, 10);
1096                         if (argv[i][0] == '\0' || *p != '\0' ||
1097                             nlogcommits <= 0 || errno)
1098                                 usage(argv[0]);
1099                 }
1100         }
1101         if (!repodir)
1102                 usage(argv[0]);
1103
1104         if (!realpath(repodir, repodirabs))
1105                 err(1, "realpath");
1106
1107         git_libgit2_init();
1108
1109 #ifdef __OpenBSD__
1110         if (unveil(repodir, "r") == -1)
1111                 err(1, "unveil: %s", repodir);
1112         if (unveil(".", "rwc") == -1)
1113                 err(1, "unveil: .");
1114         if (cachefile && unveil(cachefile, "rwc") == -1)
1115                 err(1, "unveil: %s", cachefile);
1116
1117         if (cachefile) {
1118                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1119                         err(1, "pledge");
1120         } else {
1121                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1122                         err(1, "pledge");
1123         }
1124 #endif
1125
1126         if (git_repository_open_ext(&repo, repodir,
1127                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1128                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1129                 return 1;
1130         }
1131
1132         /* find HEAD */
1133         if (!git_revparse_single(&obj, repo, "HEAD"))
1134                 head = git_object_id(obj);
1135         git_object_free(obj);
1136
1137         /* use directory name as name */
1138         if ((name = strrchr(repodirabs, '/')))
1139                 name++;
1140         else
1141                 name = "";
1142
1143         /* strip .git suffix */
1144         if (!(strippedname = strdup(name)))
1145                 err(1, "strdup");
1146         if ((p = strrchr(strippedname, '.')))
1147                 if (!strcmp(p, ".git"))
1148                         *p = '\0';
1149
1150         /* read description or .git/description */
1151         joinpath(path, sizeof(path), repodir, "description");
1152         if (!(fpread = fopen(path, "r"))) {
1153                 joinpath(path, sizeof(path), repodir, ".git/description");
1154                 fpread = fopen(path, "r");
1155         }
1156         if (fpread) {
1157                 if (!fgets(description, sizeof(description), fpread))
1158                         description[0] = '\0';
1159                 fclose(fpread);
1160         }
1161
1162         /* read url or .git/url */
1163         joinpath(path, sizeof(path), repodir, "url");
1164         if (!(fpread = fopen(path, "r"))) {
1165                 joinpath(path, sizeof(path), repodir, ".git/url");
1166                 fpread = fopen(path, "r");
1167         }
1168         if (fpread) {
1169                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1170                         cloneurl[0] = '\0';
1171                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1172                 fclose(fpread);
1173         }
1174
1175         /* check LICENSE */
1176         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1177                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1178                     git_object_type(obj) == GIT_OBJ_BLOB)
1179                         license = licensefiles[i] + strlen("HEAD:");
1180                 git_object_free(obj);
1181         }
1182
1183         /* check README */
1184         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1185                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1186                     git_object_type(obj) == GIT_OBJ_BLOB)
1187                         readme = readmefiles[i] + strlen("HEAD:");
1188                 git_object_free(obj);
1189         }
1190
1191         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1192             git_object_type(obj) == GIT_OBJ_BLOB)
1193                 submodules = ".gitmodules";
1194         git_object_free(obj);
1195
1196         /* log for HEAD */
1197         fp = efopen("log.html", "w");
1198         relpath = "";
1199         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1200         writeheader(fp, "Log");
1201         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1202               "<td><b>Commit</b></td>"
1203               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1204               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1205               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1206
1207         if (cachefile && head) {
1208                 /* read from cache file (does not need to exist) */
1209                 if ((rcachefp = fopen(cachefile, "r"))) {
1210                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1211                                 errx(1, "%s: no object id", cachefile);
1212                         if (git_oid_fromstr(&lastoid, lastoidstr))
1213                                 errx(1, "%s: invalid object id", cachefile);
1214                 }
1215
1216                 /* write log to (temporary) cache */
1217                 if ((fd = mkstemp(tmppath)) == -1)
1218                         err(1, "mkstemp");
1219                 if (!(wcachefp = fdopen(fd, "w")))
1220                         err(1, "fdopen: '%s'", tmppath);
1221                 /* write last commit id (HEAD) */
1222                 git_oid_tostr(buf, sizeof(buf), head);
1223                 fprintf(wcachefp, "%s\n", buf);
1224
1225                 writelog(fp, head);
1226
1227                 if (rcachefp) {
1228                         /* append previous log to log.html and the new cache */
1229                         while (!feof(rcachefp)) {
1230                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1231                                 if (ferror(rcachefp))
1232                                         err(1, "fread");
1233                                 if (fwrite(buf, 1, n, fp) != n ||
1234                                     fwrite(buf, 1, n, wcachefp) != n)
1235                                         err(1, "fwrite");
1236                         }
1237                         fclose(rcachefp);
1238                 }
1239                 fclose(wcachefp);
1240         } else {
1241                 if (head)
1242                         writelog(fp, head);
1243         }
1244
1245         fputs("</tbody></table>", fp);
1246         writefooter(fp);
1247         fclose(fp);
1248
1249         /* files for HEAD */
1250         fp = efopen("files.html", "w");
1251         writeheader(fp, "Files");
1252         if (head)
1253                 writefiles(fp, head);
1254         writefooter(fp);
1255         fclose(fp);
1256
1257         /* summary page with branches and tags */
1258         fp = efopen("refs.html", "w");
1259         writeheader(fp, "Refs");
1260         writerefs(fp);
1261         writefooter(fp);
1262         fclose(fp);
1263
1264         /* Atom feed */
1265         fp = efopen("atom.xml", "w");
1266         writeatom(fp);
1267         fclose(fp);
1268
1269         /* rename new cache file on success */
1270         if (cachefile && head) {
1271                 if (rename(tmppath, cachefile))
1272                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1273                 umask((mask = umask(0)));
1274                 if (chmod(cachefile,
1275                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1276                         err(1, "chmod: '%s'", cachefile);
1277         }
1278
1279         /* cleanup */
1280         git_repository_free(repo);
1281         git_libgit2_shutdown();
1282
1283         return 0;
1284 }