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                 "<title>", fp);
 348         xmlencode(fp, title, strlen(title));
 349         if (title[0] && strippedname[0])
 350                 fputs(" - ", fp);
 351         xmlencode(fp, strippedname, strlen(strippedname));
 352         if (description[0])
 353                 fputs(" - ", fp);
 354         xmlencode(fp, description, strlen(description));
 355         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 356         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 357                 name, relpath);
 358         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 359         fputs("</head>\n<body>\n<table><tr><td>", fp);
 360         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 361                 relpath, relpath);
 362         fputs("</td><td><h1>", fp);
 363         xmlencode(fp, strippedname, strlen(strippedname));
 364         fputs("</h1><span class=\"desc\">", fp);
 365         xmlencode(fp, description, strlen(description));
 366         fputs("</span></td></tr>", fp);
 367         if (cloneurl[0]) {
 368                 fputs("<tr class=\"url\"><td></td><td><span class=\"clone\">git clone <a href=\"", fp);
 369                 xmlencode(fp, cloneurl, strlen(cloneurl));
 370                 fputs("\">", fp);
 371                 xmlencode(fp, cloneurl, strlen(cloneurl));
 372                 fputs("</a></span></td></tr>", fp);
 373         }
 374         fputs("<tr><td></td><td>\n", fp);
 375         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 376         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 377         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 378         if (submodules)
 379                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 380                         relpath, submodules);
 381         if (readme)
 382                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 383                         relpath, readme);
 384         if (license)
 385                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 386                         relpath, license);
 387         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 388 }
 389
 390 void
 391 writefooter(FILE *fp)
 392 {
 393         fputs("</div>\n</body>\n</html>\n", fp);
 394 }
 395
 396 int
 397 writeblobhtml(FILE *fp, const git_blob *blob)
 398 {
 399         size_t n = 0, i, prev;
 400         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a><span class=\"loc\">";
 401         const char *s = git_blob_rawcontent(blob);
 402         git_off_t len = git_blob_rawsize(blob);
 403
 404         fputs("<pre id=\"blob\">\n", fp);
 405
 406         if (len > 0) {
 407                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 408                         if (s[i] != '\n')
 409                                 continue;
 410                         n++;
 411                         fprintf(fp, nfmt, n, n, n);
 412                         xmlencode(fp, &s[prev], i - prev + 1);
 413                         fprintf(fp, "</span>");
 414                         prev = i + 1;
 415                 }
 416                 /* trailing data */
 417                 if ((len - prev) > 0) {
 418                         n++;
 419                         fprintf(fp, nfmt, n, n, n);
 420                         xmlencode(fp, &s[prev], len - prev);
 421                         fprintf(fp, "</span>");
 422                 }
 423         }
 424
 425         fputs("</pre>\n", fp);
 426
 427         return n;
 428 }
 429
 430 void
 431 printcommit(FILE *fp, struct commitinfo *ci)
 432 {
 433         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 434                 relpath, ci->oid, ci->oid);
 435
 436         if (ci->parentoid[0])
 437                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 438                         relpath, ci->parentoid, ci->parentoid);
 439
 440         if (ci->author) {
 441                 fputs("<b>Author:</b> ", fp);
 442                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 443                 fputs(" &lt;<a href=\"mailto:", fp);
 444                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 445                 fputs("\">", fp);
 446                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 447                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 448                 printtime(fp, &(ci->author->when));
 449                 fputc('\n', fp);
 450         }
 451         if (ci->msg) {
 452                 fputc('\n', fp);
 453                 xmlencode(fp, ci->msg, strlen(ci->msg));
 454                 fputc('\n', fp);
 455         }
 456 }
 457
 458 void
 459 printshowfile(FILE *fp, struct commitinfo *ci)
 460 {
 461         const git_diff_delta *delta;
 462         const git_diff_hunk *hunk;
 463         const git_diff_line *line;
 464         git_patch *patch;
 465         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 466         char linestr[80];
 467         int c;
 468
 469         printcommit(fp, ci);
 470
 471         if (!ci->deltas)
 472                 return;
 473
 474         if (ci->filecount > 1000   ||
 475             ci->ndeltas   > 1000   ||
 476             ci->addcount  > 100000 ||
 477             ci->delcount  > 100000) {
 478                 fputs("Diff is too large, output suppressed.\n", fp);
 479                 return;
 480         }
 481
 482         /* diff stat */
 483         fputs("<b>Diffstat:</b>\n<table>", fp);
 484         for (i = 0; i < ci->ndeltas; i++) {
 485                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 486
 487                 switch (delta->status) {
 488                 case GIT_DELTA_ADDED:      c = 'A'; break;
 489                 case GIT_DELTA_COPIED:     c = 'C'; break;
 490                 case GIT_DELTA_DELETED:    c = 'D'; break;
 491                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 492                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 493                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 494                 default:                   c = ' '; break;
 495                 }
 496                 if (c == ' ')
 497                         fprintf(fp, "<tr><td>%c", c);
 498                 else
 499                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 500
 501                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 502                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 503                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 504                         fputs(" -&gt; ", fp);
 505                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 506                 }
 507
 508                 add = ci->deltas[i]->addcount;
 509                 del = ci->deltas[i]->delcount;
 510                 changed = add + del;
 511                 total = sizeof(linestr) - 2;
 512                 if (changed > total) {
 513                         if (add)
 514                                 add = ((float)total / changed * add) + 1;
 515                         if (del)
 516                                 del = ((float)total / changed * del) + 1;
 517                 }
 518                 memset(&linestr, '+', add);
 519                 memset(&linestr[add], '-', del);
 520
 521                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 522                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 523                 fwrite(&linestr, 1, add, fp);
 524                 fputs("</span><span class=\"d\">", fp);
 525                 fwrite(&linestr[add], 1, del, fp);
 526                 fputs("</span></td></tr>\n", fp);
 527         }
 528         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 529                 ci->filecount, ci->filecount == 1 ? "" : "s",
 530                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 531                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 532
 533         fputs("<hr/>", fp);
 534
 535         for (i = 0; i < ci->ndeltas; i++) {
 536                 patch = ci->deltas[i]->patch;
 537                 delta = git_patch_get_delta(patch);
 538                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 539                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 540                 fputs(".html\">", fp);
 541                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 542                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 543                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 544                 fprintf(fp, ".html\">");
 545                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 546                 fprintf(fp, "</a></b>\n");
 547
 548                 /* check binary data */
 549                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 550                         fputs("Binary files differ.\n", fp);
 551                         continue;
 552                 }
 553
 554                 nhunks = git_patch_num_hunks(patch);
 555                 for (j = 0; j < nhunks; j++) {
 556                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 557                                 break;
 558
 559                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 560                         xmlencode(fp, hunk->header, hunk->header_len);
 561                         fputs("</a>", fp);
 562
 563                         for (k = 0; ; k++) {
 564                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 565                                         break;
 566                                 if (line->old_lineno == -1)
 567                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 568                                                 i, j, k, i, j, k);
 569                                 else if (line->new_lineno == -1)
 570                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 571                                                 i, j, k, i, j, k);
 572                                 else
 573                                         fputc(' ', fp);
 574                                 xmlencode(fp, line->content, line->content_len);
 575                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 576                                         fputs("</a>", fp);
 577                         }
 578                 }
 579         }
 580 }
 581
 582 void
 583 writelogline(FILE *fp, struct commitinfo *ci)
 584 {
 585         fputs("<tr><td>", fp);
 586         if (ci->author)
 587                 printtimeshort(fp, &(ci->author->when));
 588         fputs("</td><td>", fp);
 589         if (ci->summary) {
 590                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 591                 xmlencode(fp, ci->summary, strlen(ci->summary));
 592                 fputs("</a>", fp);
 593         }
 594         fputs("</td><td>", fp);
 595         if (ci->author)
 596                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 597         fputs("</td><td class=\"num\" align=\"right\">", fp);
 598         fprintf(fp, "%zu", ci->filecount);
 599         fputs("</td><td class=\"num\" align=\"right\">", fp);
 600         fprintf(fp, "+%zu", ci->addcount);
 601         fputs("</td><td class=\"num\" align=\"right\">", fp);
 602         fprintf(fp, "-%zu", ci->delcount);
 603         fputs("</td></tr>\n", fp);
 604 }
 605
 606 int
 607 writelog(FILE *fp, const git_oid *oid)
 608 {
 609         struct commitinfo *ci;
 610         git_revwalk *w = NULL;
 611         git_oid id;
 612         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 613         FILE *fpfile;
 614         int r;
 615
 616         git_revwalk_new(&w, repo);
 617         git_revwalk_push(w, oid);
 618         git_revwalk_simplify_first_parent(w);
 619
 620         while (!git_revwalk_next(&id, w)) {
 621                 relpath = "";
 622
 623                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 624                         break;
 625
 626                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 627                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 628                 if (r < 0 || (size_t)r >= sizeof(path))
 629                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 630                 r = access(path, F_OK);
 631
 632                 /* optimization: if there are no log lines to write and
 633                    the commit file already exists: skip the diffstat */
 634                 if (!nlogcommits && !r)
 635                         continue;
 636
 637                 if (!(ci = commitinfo_getbyoid(&id)))
 638                         break;
 639                 /* diffstat: for stagit HTML required for the log.html line */
 640                 if (commitinfo_getstats(ci) == -1)
 641                         goto err;
 642
 643                 if (nlogcommits < 0) {
 644                         writelogline(fp, ci);
 645                 } else if (nlogcommits > 0) {
 646                         writelogline(fp, ci);
 647                         nlogcommits--;
 648                         if (!nlogcommits && ci->parentoid[0])
 649                                 fputs("<tr><td></td><td colspan=\"5\">"
 650                                       "More commits remaining [...]</td>"
 651                                       "</tr>\n", fp);
 652                 }
 653
 654                 if (cachefile)
 655                         writelogline(wcachefp, ci);
 656
 657                 /* check if file exists if so skip it */
 658                 if (r) {
 659                         relpath = "../";
 660                         fpfile = efopen(path, "w");
 661                         writeheader(fpfile, ci->summary);
 662                         fputs("<pre>", fpfile);
 663                         printshowfile(fpfile, ci);
 664                         fputs("</pre>\n", fpfile);
 665                         writefooter(fpfile);
 666                         fclose(fpfile);
 667                 }
 668 err:
 669                 commitinfo_free(ci);
 670         }
 671         git_revwalk_free(w);
 672
 673         relpath = "";
 674
 675         return 0;
 676 }
 677
 678 void
 679 printcommitatom(FILE *fp, struct commitinfo *ci)
 680 {
 681         fputs("<entry>\n", fp);
 682
 683         fprintf(fp, "<id>%s</id>\n", ci->oid);
 684         if (ci->author) {
 685                 fputs("<published>", fp);
 686                 printtimez(fp, &(ci->author->when));
 687                 fputs("</published>\n", fp);
 688         }
 689         if (ci->committer) {
 690                 fputs("<updated>", fp);
 691                 printtimez(fp, &(ci->committer->when));
 692                 fputs("</updated>\n", fp);
 693         }
 694         if (ci->summary) {
 695                 fputs("<title type=\"text\">", fp);
 696                 xmlencode(fp, ci->summary, strlen(ci->summary));
 697                 fputs("</title>\n", fp);
 698         }
 699         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />\n",
 700                 ci->oid);
 701
 702         if (ci->author) {
 703                 fputs("<author>\n<name>", fp);
 704                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 705                 fputs("</name>\n<email>", fp);
 706                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 707                 fputs("</email>\n</author>\n", fp);
 708         }
 709
 710         fputs("<content type=\"text\">", fp);
 711         fprintf(fp, "commit %s\n", ci->oid);
 712         if (ci->parentoid[0])
 713                 fprintf(fp, "parent %s\n", ci->parentoid);
 714         if (ci->author) {
 715                 fputs("Author: ", fp);
 716                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 717                 fputs(" &lt;", fp);
 718                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 719                 fputs("&gt;\nDate:   ", fp);
 720                 printtime(fp, &(ci->author->when));
 721                 fputc('\n', fp);
 722         }
 723         if (ci->msg) {
 724                 fputc('\n', fp);
 725                 xmlencode(fp, ci->msg, strlen(ci->msg));
 726         }
 727         fputs("\n</content>\n</entry>\n", fp);
 728 }
 729
 730 int
 731 writeatom(FILE *fp)
 732 {
 733         struct commitinfo *ci;
 734         git_revwalk *w = NULL;
 735         git_oid id;
 736         size_t i, m = 100; /* last 'm' commits */
 737
 738         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 739               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 740         xmlencode(fp, strippedname, strlen(strippedname));
 741         fputs(", branch HEAD</title>\n<subtitle>", fp);
 742         xmlencode(fp, description, strlen(description));
 743         fputs("</subtitle>\n", fp);
 744
 745         git_revwalk_new(&w, repo);
 746         git_revwalk_push_head(w);
 747         git_revwalk_simplify_first_parent(w);
 748
 749         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 750                 if (!(ci = commitinfo_getbyoid(&id)))
 751                         break;
 752                 printcommitatom(fp, ci);
 753                 commitinfo_free(ci);
 754         }
 755         git_revwalk_free(w);
 756
 757         fputs("</feed>\n", fp);
 758
 759         return 0;
 760 }
 761
 762 int
 763 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 764 {
 765         char tmp[PATH_MAX] = "", *d;
 766         const char *p;
 767         int lc = 0;
 768         FILE *fp;
 769
 770         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 771                 errx(1, "path truncated: '%s'", fpath);
 772         if (!(d = dirname(tmp)))
 773                 err(1, "dirname");
 774         if (mkdirp(d))
 775                 return -1;
 776
 777         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 778                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 779                         errx(1, "path truncated: '../%s'", tmp);
 780         }
 781         relpath = tmp;
 782
 783         fp = efopen(fpath, "w");
 784         writeheader(fp, filename);
 785         fputs("<p> ", fp);
 786         xmlencode(fp, filename, strlen(filename));
 787         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 788         fputs("</p><hr/>", fp);
 789
 790         if (git_blob_is_binary((git_blob *)obj)) {
 791                 fputs("<p>Binary file.</p>\n", fp);
 792         } else {
 793                 lc = writeblobhtml(fp, (git_blob *)obj);
 794                 if (ferror(fp))
 795                         err(1, "fwrite");
 796         }
 797         writefooter(fp);
 798         fclose(fp);
 799
 800         relpath = "";
 801
 802         return lc;
 803 }
 804
 805 const char *
 806 filemode(git_filemode_t m)
 807 {
 808         static char mode[11];
 809
 810         memset(mode, '-', sizeof(mode) - 1);
 811         mode[10] = '\0';
 812
 813         if (S_ISREG(m))
 814                 mode[0] = '-';
 815         else if (S_ISBLK(m))
 816                 mode[0] = 'b';
 817         else if (S_ISCHR(m))
 818                 mode[0] = 'c';
 819         else if (S_ISDIR(m))
 820                 mode[0] = 'd';
 821         else if (S_ISFIFO(m))
 822                 mode[0] = 'p';
 823         else if (S_ISLNK(m))
 824                 mode[0] = 'l';
 825         else if (S_ISSOCK(m))
 826                 mode[0] = 's';
 827         else
 828                 mode[0] = '?';
 829
 830         if (m & S_IRUSR) mode[1] = 'r';
 831         if (m & S_IWUSR) mode[2] = 'w';
 832         if (m & S_IXUSR) mode[3] = 'x';
 833         if (m & S_IRGRP) mode[4] = 'r';
 834         if (m & S_IWGRP) mode[5] = 'w';
 835         if (m & S_IXGRP) mode[6] = 'x';
 836         if (m & S_IROTH) mode[7] = 'r';
 837         if (m & S_IWOTH) mode[8] = 'w';
 838         if (m & S_IXOTH) mode[9] = 'x';
 839
 840         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 841         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 842         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 843
 844         return mode;
 845 }
 846
 847 int
 848 writefilestree(FILE *fp, git_tree *tree, const char *path)
 849 {
 850         const git_tree_entry *entry = NULL;
 851         git_submodule *module = NULL;
 852         git_object *obj = NULL;
 853         git_off_t filesize;
 854         const char *entryname;
 855         char filepath[PATH_MAX], entrypath[PATH_MAX];
 856         size_t count, i;
 857         int lc, r, ret;
 858
 859         count = git_tree_entrycount(tree);
 860         for (i = 0; i < count; i++) {
 861                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 862                     !(entryname = git_tree_entry_name(entry)))
 863                         return -1;
 864                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 865
 866                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 867                          entrypath);
 868                 if (r < 0 || (size_t)r >= sizeof(filepath))
 869                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 870
 871                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 872                         switch (git_object_type(obj)) {
 873                         case GIT_OBJ_BLOB:
 874                                 break;
 875                         case GIT_OBJ_TREE:
 876                                 /* NOTE: recurses */
 877                                 ret = writefilestree(fp, (git_tree *)obj,
 878                                                      entrypath);
 879                                 git_object_free(obj);
 880                                 if (ret)
 881                                         return ret;
 882                                 continue;
 883                         default:
 884                                 git_object_free(obj);
 885                                 continue;
 886                         }
 887
 888                         filesize = git_blob_rawsize((git_blob *)obj);
 889                         lc = writeblob(obj, filepath, entryname, filesize);
 890
 891                         fputs("<tr><td>", fp);
 892                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 893                         fprintf(fp, "</td><td><a href=\"%s", relpath);
 894                         xmlencode(fp, filepath, strlen(filepath));
 895                         fputs("\">", fp);
 896                         xmlencode(fp, entrypath, strlen(entrypath));
 897                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 898                         if (lc > 0)
 899                                 fprintf(fp, "%dL", lc);
 900                         else
 901                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 902                         fputs("</td></tr>\n", fp);
 903                         git_object_free(obj);
 904                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 905                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 906                                 relpath);
 907                         xmlencode(fp, entrypath, strlen(entrypath));
 908                         git_submodule_free(module);
 909                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 910                 }
 911         }
 912
 913         return 0;
 914 }
 915
 916 int
 917 writefiles(FILE *fp, const git_oid *id)
 918 {
 919         git_tree *tree = NULL;
 920         git_commit *commit = NULL;
 921         int ret = -1;
 922
 923         fputs("<table id=\"files\"><thead>\n<tr>"
 924               "<td><b>Mode</b></td><td><b>Name</b></td>"
 925               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 926               "</tr>\n</thead><tbody>\n", fp);
 927
 928         if (!git_commit_lookup(&commit, repo, id) &&
 929             !git_commit_tree(&tree, commit))
 930                 ret = writefilestree(fp, tree, "");
 931
 932         fputs("</tbody></table>", fp);
 933
 934         git_commit_free(commit);
 935         git_tree_free(tree);
 936
 937         return ret;
 938 }
 939
 940 int
 941 refs_cmp(const void *v1, const void *v2)
 942 {
 943         git_reference *r1 = (*(git_reference **)v1);
 944         git_reference *r2 = (*(git_reference **)v2);
 945         int r;
 946
 947         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 948                 return r;
 949
 950         return strcmp(git_reference_shorthand(r1),
 951                       git_reference_shorthand(r2));
 952 }
 953
 954 int
 955 writerefs(FILE *fp)
 956 {
 957         struct commitinfo *ci;
 958         const git_oid *id = NULL;
 959         git_object *obj = NULL;
 960         git_reference *dref = NULL, *r, *ref = NULL;
 961         git_reference_iterator *it = NULL;
 962         git_reference **refs = NULL;
 963         size_t count, i, j, refcount;
 964         const char *titles[] = { "Branches", "Tags" };
 965         const char *ids[] = { "branches", "tags" };
 966         const char *name;
 967
 968         if (git_reference_iterator_new(&it, repo))
 969                 return -1;
 970
 971         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 972                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 973                         err(1, "realloc");
 974                 refs[refcount] = ref;
 975         }
 976         git_reference_iterator_free(it);
 977
 978         /* sort by type then shorthand name */
 979         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 980
 981         for (j = 0; j < 2; j++) {
 982                 for (i = 0, count = 0; i < refcount; i++) {
 983                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 984                             !(git_reference_is_tag(refs[i]) && j == 1))
 985                                 continue;
 986
 987                         switch (git_reference_type(refs[i])) {
 988                         case GIT_REF_SYMBOLIC:
 989                                 if (git_reference_resolve(&dref, refs[i]))
 990                                         goto err;
 991                                 r = dref;
 992                                 break;
 993                         case GIT_REF_OID:
 994                                 r = refs[i];
 995                                 break;
 996                         default:
 997                                 continue;
 998                         }
 999                         if (!git_reference_target(r) ||
1000                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1001                                 goto err;
1002                         if (!(id = git_object_id(obj)))
1003                                 goto err;
1004                         if (!(ci = commitinfo_getbyoid(id)))
1005                                 break;
1006
1007                         /* print header if it has an entry (first). */
1008                         if (++count == 1) {
1009                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1010                                         "<thead>\n<tr><td><b>Name</b></td>"
1011                                         "<td><b>Last commit date</b></td>"
1012                                         "<td><b>Author</b></td>\n</tr>\n"
1013                                         "</thead><tbody>\n",
1014                                          titles[j], ids[j]);
1015                         }
1016
1017                         relpath = "";
1018                         name = git_reference_shorthand(r);
1019
1020                         fputs("<tr><td>", fp);
1021                         xmlencode(fp, name, strlen(name));
1022                         fputs("</td><td>", fp);
1023                         if (ci->author)
1024                                 printtimeshort(fp, &(ci->author->when));
1025                         fputs("</td><td>", fp);
1026                         if (ci->author)
1027                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1028                         fputs("</td></tr>\n", fp);
1029
1030                         relpath = "../";
1031
1032                         commitinfo_free(ci);
1033                         git_object_free(obj);
1034                         obj = NULL;
1035                         git_reference_free(dref);
1036                         dref = NULL;
1037                 }
1038                 /* table footer */
1039                 if (count)
1040                         fputs("</tbody></table><br/>", fp);
1041         }
1042
1043 err:
1044         git_object_free(obj);
1045         git_reference_free(dref);
1046
1047         for (i = 0; i < refcount; i++)
1048                 git_reference_free(refs[i]);
1049         free(refs);
1050
1051         return 0;
1052 }
1053
1054 void
1055 usage(char *argv0)
1056 {
1057         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1058         exit(1);
1059 }
1060
1061 int
1062 main(int argc, char *argv[])
1063 {
1064         git_object *obj = NULL;
1065         const git_oid *head = NULL;
1066         mode_t mask;
1067         FILE *fp, *fpread;
1068         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1069         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1070         size_t n;
1071         int i, fd;
1072
1073         for (i = 1; i < argc; i++) {
1074                 if (argv[i][0] != '-') {
1075                         if (repodir)
1076                                 usage(argv[0]);
1077                         repodir = argv[i];
1078                 } else if (argv[i][1] == 'c') {
1079                         if (nlogcommits > 0 || i + 1 >= argc)
1080                                 usage(argv[0]);
1081                         cachefile = argv[++i];
1082                 } else if (argv[i][1] == 'l') {
1083                         if (cachefile || i + 1 >= argc)
1084                                 usage(argv[0]);
1085                         errno = 0;
1086                         nlogcommits = strtoll(argv[++i], &p, 10);
1087                         if (argv[i][0] == '\0' || *p != '\0' ||
1088                             nlogcommits <= 0 || errno)
1089                                 usage(argv[0]);
1090                 }
1091         }
1092         if (!repodir)
1093                 usage(argv[0]);
1094
1095         if (!realpath(repodir, repodirabs))
1096                 err(1, "realpath");
1097
1098         git_libgit2_init();
1099
1100 #ifdef __OpenBSD__
1101         if (unveil(repodir, "r") == -1)
1102                 err(1, "unveil: %s", repodir);
1103         if (unveil(".", "rwc") == -1)
1104                 err(1, "unveil: .");
1105         if (cachefile && unveil(cachefile, "rwc") == -1)
1106                 err(1, "unveil: %s", cachefile);
1107
1108         if (cachefile) {
1109                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1110                         err(1, "pledge");
1111         } else {
1112                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1113                         err(1, "pledge");
1114         }
1115 #endif
1116
1117         if (git_repository_open_ext(&repo, repodir,
1118                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1119                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1120                 return 1;
1121         }
1122
1123         /* find HEAD */
1124         if (!git_revparse_single(&obj, repo, "HEAD"))
1125                 head = git_object_id(obj);
1126         git_object_free(obj);
1127
1128         /* use directory name as name */
1129         if ((name = strrchr(repodirabs, '/')))
1130                 name++;
1131         else
1132                 name = "";
1133
1134         /* strip .git suffix */
1135         if (!(strippedname = strdup(name)))
1136                 err(1, "strdup");
1137         if ((p = strrchr(strippedname, '.')))
1138                 if (!strcmp(p, ".git"))
1139                         *p = '\0';
1140
1141         /* read description or .git/description */
1142         joinpath(path, sizeof(path), repodir, "description");
1143         if (!(fpread = fopen(path, "r"))) {
1144                 joinpath(path, sizeof(path), repodir, ".git/description");
1145                 fpread = fopen(path, "r");
1146         }
1147         if (fpread) {
1148                 if (!fgets(description, sizeof(description), fpread))
1149                         description[0] = '\0';
1150                 fclose(fpread);
1151         }
1152
1153         /* read url or .git/url */
1154         joinpath(path, sizeof(path), repodir, "url");
1155         if (!(fpread = fopen(path, "r"))) {
1156                 joinpath(path, sizeof(path), repodir, ".git/url");
1157                 fpread = fopen(path, "r");
1158         }
1159         if (fpread) {
1160                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1161                         cloneurl[0] = '\0';
1162                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1163                 fclose(fpread);
1164         }
1165
1166         /* check LICENSE */
1167         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1168                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1169                     git_object_type(obj) == GIT_OBJ_BLOB)
1170                         license = licensefiles[i] + strlen("HEAD:");
1171                 git_object_free(obj);
1172         }
1173
1174         /* check README */
1175         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1176                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1177                     git_object_type(obj) == GIT_OBJ_BLOB)
1178                         readme = readmefiles[i] + strlen("HEAD:");
1179                 git_object_free(obj);
1180         }
1181
1182         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1183             git_object_type(obj) == GIT_OBJ_BLOB)
1184                 submodules = ".gitmodules";
1185         git_object_free(obj);
1186
1187         /* log for HEAD */
1188         fp = efopen("log.html", "w");
1189         relpath = "";
1190         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1191         writeheader(fp, "Log");
1192         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1193               "<td><b>Commit message</b></td>"
1194               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1195               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1196               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1197
1198         if (cachefile && head) {
1199                 /* read from cache file (does not need to exist) */
1200                 if ((rcachefp = fopen(cachefile, "r"))) {
1201                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1202                                 errx(1, "%s: no object id", cachefile);
1203                         if (git_oid_fromstr(&lastoid, lastoidstr))
1204                                 errx(1, "%s: invalid object id", cachefile);
1205                 }
1206
1207                 /* write log to (temporary) cache */
1208                 if ((fd = mkstemp(tmppath)) == -1)
1209                         err(1, "mkstemp");
1210                 if (!(wcachefp = fdopen(fd, "w")))
1211                         err(1, "fdopen: '%s'", tmppath);
1212                 /* write last commit id (HEAD) */
1213                 git_oid_tostr(buf, sizeof(buf), head);
1214                 fprintf(wcachefp, "%s\n", buf);
1215
1216                 writelog(fp, head);
1217
1218                 if (rcachefp) {
1219                         /* append previous log to log.html and the new cache */
1220                         while (!feof(rcachefp)) {
1221                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1222                                 if (ferror(rcachefp))
1223                                         err(1, "fread");
1224                                 if (fwrite(buf, 1, n, fp) != n ||
1225                                     fwrite(buf, 1, n, wcachefp) != n)
1226                                         err(1, "fwrite");
1227                         }
1228                         fclose(rcachefp);
1229                 }
1230                 fclose(wcachefp);
1231         } else {
1232                 if (head)
1233                         writelog(fp, head);
1234         }
1235
1236         fputs("</tbody></table>", fp);
1237         writefooter(fp);
1238         fclose(fp);
1239
1240         /* files for HEAD */
1241         fp = efopen("files.html", "w");
1242         writeheader(fp, "Files");
1243         if (head)
1244                 writefiles(fp, head);
1245         writefooter(fp);
1246         fclose(fp);
1247
1248         /* summary page with branches and tags */
1249         fp = efopen("refs.html", "w");
1250         writeheader(fp, "Refs");
1251         writerefs(fp);
1252         writefooter(fp);
1253         fclose(fp);
1254
1255         /* Atom feed */
1256         fp = efopen("atom.xml", "w");
1257         writeatom(fp);
1258         fclose(fp);
1259
1260         /* rename new cache file on success */
1261         if (cachefile && head) {
1262                 if (rename(tmppath, cachefile))
1263                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1264                 umask((mask = umask(0)));
1265                 if (chmod(cachefile,
1266                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1267                         err(1, "chmod: '%s'", cachefile);
1268         }
1269
1270         /* cleanup */
1271         git_repository_free(repo);
1272         git_libgit2_shutdown();
1273
1274         return 0;
1275 }