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