src/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 "cp.h"
  18 #include "compat.h"
  19
  20 struct deltainfo {
  21         git_patch *patch;
  22
  23         size_t addcount;
  24         size_t delcount;
  25 };
  26
  27 struct commitinfo {
  28         const git_oid *id;
  29
  30         char oid[GIT_OID_HEXSZ + 1];
  31         char parentoid[GIT_OID_HEXSZ + 1];
  32
  33         const git_signature *author;
  34         const git_signature *committer;
  35         const char          *summary;
  36         const char          *msg;
  37
  38         git_diff   *diff;
  39         git_commit *commit;
  40         git_commit *parent;
  41         git_tree   *commit_tree;
  42         git_tree   *parent_tree;
  43
  44         size_t addcount;
  45         size_t delcount;
  46         size_t filecount;
  47
  48         struct deltainfo **deltas;
  49         size_t ndeltas;
  50 };
  51
  52 static git_repository *repo;
  53
  54 static const char *relpath = "";
  55 static const char *repodir;
  56
  57 static char *name = "";
  58 static char *strippedname = "";
  59 static char description[255];
  60 static char cloneurl[1024];
  61 static char *submodules;
  62 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
  63 static char *license;
  64 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
  65 static char *readme;
  66 static long long nlogcommits = -1; /* < 0 indicates not used */
  67
  68 /* cache */
  69 static git_oid lastoid;
  70 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  71 static FILE *rcachefp, *wcachefp;
  72 static const char *cachefile;
  73
  74 void
  75 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  76 {
  77         int r;
  78
  79         r = snprintf(buf, bufsiz, "%s%s%s",
  80                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  81         if (r < 0 || (size_t)r >= bufsiz)
  82                 errx(1, "path truncated: '%s%s%s'",
  83                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  84 }
  85
  86 void
  87 deltainfo_free(struct deltainfo *di)
  88 {
  89         if (!di)
  90                 return;
  91         git_patch_free(di->patch);
  92         memset(di, 0, sizeof(*di));
  93         free(di);
  94 }
  95
  96 int
  97 commitinfo_getstats(struct commitinfo *ci)
  98 {
  99         struct deltainfo *di;
 100         git_diff_options opts;
 101         git_diff_find_options fopts;
 102         const git_diff_delta *delta;
 103         const git_diff_hunk *hunk;
 104         const git_diff_line *line;
 105         git_patch *patch = NULL;
 106         size_t ndeltas, nhunks, nhunklines;
 107         size_t i, j, k;
 108
 109         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 110                 goto err;
 111         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 112                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 113                         ci->parent = NULL;
 114                         ci->parent_tree = NULL;
 115                 }
 116         }
 117
 118         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 119         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 120                       GIT_DIFF_IGNORE_SUBMODULES |
 121                       GIT_DIFF_INCLUDE_TYPECHANGE;
 122         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 123                 goto err;
 124
 125         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 126                 goto err;
 127         /* find renames and copies, exact matches (no heuristic) for renames. */
 128         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
 129                        GIT_DIFF_FIND_EXACT_MATCH_ONLY;
 130         if (git_diff_find_similar(ci->diff, &fopts))
 131                 goto err;
 132
 133         ndeltas = git_diff_num_deltas(ci->diff);
 134         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 135                 err(1, "calloc");
 136
 137         for (i = 0; i < ndeltas; i++) {
 138                 if (git_patch_from_diff(&patch, ci->diff, i))
 139                         goto err;
 140
 141                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 142                         err(1, "calloc");
 143                 di->patch = patch;
 144                 ci->deltas[i] = di;
 145
 146                 delta = git_patch_get_delta(patch);
 147
 148                 /* skip stats for binary data */
 149                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 150                         continue;
 151
 152                 nhunks = git_patch_num_hunks(patch);
 153                 for (j = 0; j < nhunks; j++) {
 154                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 155                                 break;
 156                         for (k = 0; ; k++) {
 157                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 158                                         break;
 159                                 if (line->old_lineno == -1) {
 160                                         di->addcount++;
 161                                         ci->addcount++;
 162                                 } else if (line->new_lineno == -1) {
 163                                         di->delcount++;
 164                                         ci->delcount++;
 165                                 }
 166                         }
 167                 }
 168         }
 169         ci->ndeltas = i;
 170         ci->filecount = i;
 171
 172         return 0;
 173
 174 err:
 175         git_diff_free(ci->diff);
 176         ci->diff = NULL;
 177         git_tree_free(ci->commit_tree);
 178         ci->commit_tree = NULL;
 179         git_tree_free(ci->parent_tree);
 180         ci->parent_tree = NULL;
 181         git_commit_free(ci->parent);
 182         ci->parent = NULL;
 183
 184         if (ci->deltas)
 185                 for (i = 0; i < ci->ndeltas; i++)
 186                         deltainfo_free(ci->deltas[i]);
 187         free(ci->deltas);
 188         ci->deltas = NULL;
 189         ci->ndeltas = 0;
 190         ci->addcount = 0;
 191         ci->delcount = 0;
 192         ci->filecount = 0;
 193
 194         return -1;
 195 }
 196
 197 void
 198 commitinfo_free(struct commitinfo *ci)
 199 {
 200         size_t i;
 201
 202         if (!ci)
 203                 return;
 204         if (ci->deltas)
 205                 for (i = 0; i < ci->ndeltas; i++)
 206                         deltainfo_free(ci->deltas[i]);
 207
 208         free(ci->deltas);
 209         git_diff_free(ci->diff);
 210         git_tree_free(ci->commit_tree);
 211         git_tree_free(ci->parent_tree);
 212         git_commit_free(ci->commit);
 213         git_commit_free(ci->parent);
 214         memset(ci, 0, sizeof(*ci));
 215         free(ci);
 216 }
 217
 218 struct commitinfo *
 219 commitinfo_getbyoid(const git_oid *id)
 220 {
 221         struct commitinfo *ci;
 222
 223         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 224                 err(1, "calloc");
 225
 226         if (git_commit_lookup(&(ci->commit), repo, id))
 227                 goto err;
 228         ci->id = id;
 229
 230         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 231         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 232
 233         ci->author = git_commit_author(ci->commit);
 234         ci->committer = git_commit_committer(ci->commit);
 235         ci->summary = git_commit_summary(ci->commit);
 236         ci->msg = git_commit_message(ci->commit);
 237
 238         return ci;
 239
 240 err:
 241         commitinfo_free(ci);
 242
 243         return NULL;
 244 }
 245
 246 FILE *
 247 efopen(const char *name, const char *flags)
 248 {
 249         FILE *fp;
 250
 251         if (!(fp = fopen(name, flags)))
 252                 err(1, "fopen: '%s'", name);
 253
 254         return fp;
 255 }
 256
 257 /* Escape characters below as HTML 2.0 / XML 1.0. */
 258 void
 259 xmlencode(FILE *fp, const char *s, size_t len)
 260 {
 261         size_t i;
 262
 263         for (i = 0; *s && i < len; s++, i++) {
 264                 switch(*s) {
 265                 case '<':  fputs("&lt;",   fp); break;
 266                 case '>':  fputs("&gt;",   fp); break;
 267                 case '\'': fputs("&#39;",  fp); break;
 268                 case '&':  fputs("&amp;",  fp); break;
 269                 case '"':  fputs("&quot;", fp); break;
 270                 default:   fputc(*s, fp);
 271                 }
 272         }
 273 }
 274
 275 int
 276 mkdirp(const char *path)
 277 {
 278         char tmp[PATH_MAX], *p;
 279
 280         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 281                 errx(1, "path truncated: '%s'", path);
 282         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 283                 if (*p != '/')
 284                         continue;
 285                 *p = '\0';
 286                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 287                         return -1;
 288                 *p = '/';
 289         }
 290         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 291                 return -1;
 292         return 0;
 293 }
 294
 295 void
 296 printtimez(FILE *fp, const git_time *intime)
 297 {
 298         struct tm *intm;
 299         time_t t;
 300         char out[32];
 301
 302         t = (time_t)intime->time;
 303         if (!(intm = gmtime(&t)))
 304                 return;
 305         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 306         fputs(out, fp);
 307 }
 308
 309 void
 310 printtime(FILE *fp, const git_time *intime)
 311 {
 312         struct tm *intm;
 313         time_t t;
 314         char out[32];
 315
 316         t = (time_t)intime->time + (intime->offset * 60);
 317         if (!(intm = gmtime(&t)))
 318                 return;
 319         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 320         if (intime->offset < 0)
 321                 fprintf(fp, "%s -%02d%02d", out,
 322                             -(intime->offset) / 60, -(intime->offset) % 60);
 323         else
 324                 fprintf(fp, "%s +%02d%02d", out,
 325                             intime->offset / 60, intime->offset % 60);
 326 }
 327
 328 void
 329 printtimeshort(FILE *fp, const git_time *intime)
 330 {
 331         struct tm *intm;
 332         time_t t;
 333         char out[32];
 334
 335         t = (time_t)intime->time;
 336         if (!(intm = gmtime(&t)))
 337                 return;
 338         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 339         fputs(out, fp);
 340 }
 341
 342 void
 343 writeheader(FILE *fp, const char *title)
 344 {
 345         fputs("<!DOCTYPE html>\n"
 346                 "<html>\n<head>\n"
 347                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 348                 "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n"
 349                 "<title>", fp);
 350         xmlencode(fp, title, strlen(title));
 351         if (title[0] && strippedname[0])
 352                 fputs(" - ", fp);
 353         xmlencode(fp, strippedname, strlen(strippedname));
 354         if (description[0])
 355                 fputs(" - ", fp);
 356         xmlencode(fp, description, strlen(description));
 357         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 358         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 359                 name, relpath);
 360         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 361         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%ssyntax.css\" />\n", relpath);
 362         fputs("</head>\n<body>\n<table><tr><td>", fp);
 363         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 364                 relpath, relpath);
 365         fputs("</td><td><h1>", fp);
 366         xmlencode(fp, strippedname, strlen(strippedname));
 367         fputs("</h1></td></tr><tr><td></td><td><span class=\"desc\">", fp);
 368         xmlencode(fp, description, strlen(description));
 369         fputs("</span></td></tr>", fp);
 370         if (cloneurl[0]) {
 371                 fputs("<tr class=\"url\"><td></td><td><span class=\"clone\">git clone <a href=\"", fp);
 372                 xmlencode(fp, cloneurl, strlen(cloneurl));
 373                 fputs("\">", fp);
 374                 xmlencode(fp, cloneurl, strlen(cloneurl));
 375                 fputs("</a></span></td></tr>", fp);
 376         }
 377         fputs("<tr><td></td><td>\n", fp);
 378         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 379         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 380         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 381         if (submodules)
 382                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 383                         relpath, submodules);
 384         if (readme)
 385                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 386                         relpath, readme);
 387         if (license)
 388                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 389                         relpath, license);
 390         fprintf(fp, " | <a href=\"%s%s.tar.gz\">Download</a>",
 391                                         relpath, strippedname);
 392         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 393 }
 394
 395 void
 396 writefooter(FILE *fp)
 397 {
 398         fputs("</div>\n</body>\n</html>\n", fp);
 399 }
 400
 401 int
 402 call_chroma(const char *filename, FILE *fp, const char *s, size_t len)
 403 {
 404         // Flush HTML-file
 405         fflush(fp);
 406         // Copy STDOUT
 407         int stdout_copy = dup(1);
 408         // Redirect STDOUT
 409         dup2(fileno(fp), 1);
 410
 411         char cmd[] = "chroma --html --html-only --html-lines --html-lines-table --filename ";
 412         strcat(cmd, filename);
 413
 414         FILE *child = popen(cmd, "w");
 415         if (child == NULL) {
 416                 printf("child is null: %s", strerror(errno));
 417                 exit(1);
 418         }
 419         // Give filename through STDIN:
 420         fprintf(child, "%s\n", filename);
 421         // Give code to highlight through STDIN:
 422         int lc;
 423         size_t i;
 424         for (i = 0; *s && i < len; s++, i++) {
 425                 if (*s == '\n') lc++;
 426                 fprintf(child, "%c", *s);
 427         }
 428
 429         pclose(child);
 430         fflush(stdout);
 431         // Give back STDOUT.
 432         dup2(stdout_copy, 1);
 433         return lc;
 434 }
 435
 436 int
 437 writeblobhtml(const char *filename, FILE *fp, const git_blob *blob)
 438 {
 439         int lc = 0;
 440         const char *s = git_blob_rawcontent(blob);
 441         git_off_t len = git_blob_rawsize(blob);
 442
 443         if (len > 0) {
 444                 lc = call_chroma(filename, fp, s, len);
 445         }
 446
 447         return lc;
 448 }
 449
 450 void
 451 printcommit(FILE *fp, struct commitinfo *ci)
 452 {
 453         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 454                         relpath, ci->oid, ci->oid);
 455
 456         if (ci->parentoid[0])
 457                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 458                                 relpath, ci->parentoid, ci->parentoid);
 459
 460         if (ci->author) {
 461                 fputs("<b>Author:</b> ", fp);
 462                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 463                 fputs(" &lt;<a href=\"mailto:", fp);
 464                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 465                 fputs("\">", fp);
 466                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 467                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 468                 printtime(fp, &(ci->author->when));
 469                 fputc('\n', fp);
 470         }
 471         if (ci->msg) {
 472                 fputc('\n', fp);
 473                 xmlencode(fp, ci->msg, strlen(ci->msg));
 474                 fputc('\n', fp);
 475         }
 476 }
 477
 478 void
 479 printshowfile(FILE *fp, struct commitinfo *ci)
 480 {
 481         const git_diff_delta *delta;
 482         const git_diff_hunk *hunk;
 483         const git_diff_line *line;
 484         git_patch *patch;
 485         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 486         char linestr[80];
 487         int c;
 488
 489         printcommit(fp, ci);
 490
 491         if (!ci->deltas)
 492                 return;
 493
 494         if (ci->filecount > 1000   ||
 495             ci->ndeltas   > 1000   ||
 496             ci->addcount  > 100000 ||
 497             ci->delcount  > 100000) {
 498                 fputs("Diff is too large, output suppressed.\n", fp);
 499                 return;
 500         }
 501
 502         /* diff stat */
 503         fputs("<b>Diffstat:</b>\n<table>", fp);
 504         for (i = 0; i < ci->ndeltas; i++) {
 505                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 506
 507                 switch (delta->status) {
 508                 case GIT_DELTA_ADDED:      c = 'A'; break;
 509                 case GIT_DELTA_COPIED:     c = 'C'; break;
 510                 case GIT_DELTA_DELETED:    c = 'D'; break;
 511                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 512                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 513                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 514                 default:                   c = ' '; break;
 515                 }
 516                 if (c == ' ')
 517                         fprintf(fp, "<tr><td>%c", c);
 518                 else
 519                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 520
 521                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 522                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 523                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 524                         fputs(" -&gt; ", fp);
 525                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 526                 }
 527
 528                 add = ci->deltas[i]->addcount;
 529                 del = ci->deltas[i]->delcount;
 530                 changed = add + del;
 531                 total = sizeof(linestr) - 2;
 532                 if (changed > total) {
 533                         if (add)
 534                                 add = ((float)total / changed * add) + 1;
 535                         if (del)
 536                                 del = ((float)total / changed * del) + 1;
 537                 }
 538                 memset(&linestr, '+', add);
 539                 memset(&linestr[add], '-', del);
 540
 541                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 542                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 543                 fwrite(&linestr, 1, add, fp);
 544                 fputs("</span><span class=\"d\">", fp);
 545                 fwrite(&linestr[add], 1, del, fp);
 546                 fputs("</span></td></tr>\n", fp);
 547         }
 548         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 549                 ci->filecount, ci->filecount == 1 ? "" : "s",
 550                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 551                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 552
 553         fputs("<hr/>", fp);
 554
 555         for (i = 0; i < ci->ndeltas; i++) {
 556                 patch = ci->deltas[i]->patch;
 557                 delta = git_patch_get_delta(patch);
 558                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 559                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 560                 fputs(".html\">", fp);
 561                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 562                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 563                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 564                 fprintf(fp, ".html\">");
 565                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 566                 fprintf(fp, "</a></b>\n");
 567
 568                 /* check binary data */
 569                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 570                         fputs("Binary files differ.\n", fp);
 571                         continue;
 572                 }
 573
 574                 nhunks = git_patch_num_hunks(patch);
 575                 for (j = 0; j < nhunks; j++) {
 576                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 577                                 break;
 578
 579                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 580                         xmlencode(fp, hunk->header, hunk->header_len);
 581                         fputs("</a>", fp);
 582
 583                         for (k = 0; ; k++) {
 584                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 585                                         break;
 586                                 if (line->old_lineno == -1)
 587                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 588                                                 i, j, k, i, j, k);
 589                                 else if (line->new_lineno == -1)
 590                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 591                                                 i, j, k, i, j, k);
 592                                 else
 593                                         fputc(' ', fp);
 594                                 xmlencode(fp, line->content, line->content_len);
 595                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 596                                         fputs("</a>", fp);
 597                         }
 598                 }
 599         }
 600 }
 601
 602 void
 603 writelogline(FILE *fp, struct commitinfo *ci)
 604 {
 605         fputs("<tr><td>", fp);
 606         if (ci->author)
 607                 printtimeshort(fp, &(ci->author->when));
 608         fputs("</td><td>", fp);
 609         if (ci->summary) {
 610                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 611                 xmlencode(fp, ci->summary, strlen(ci->summary));
 612                 fputs("</a>", fp);
 613         }
 614         fputs("</td><td>", fp);
 615         if (ci->author)
 616                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 617         fputs("</td><td class=\"num\" align=\"right\">", fp);
 618         fprintf(fp, "%zu", ci->filecount);
 619         fputs("</td><td class=\"num\" align=\"right\">", fp);
 620         fprintf(fp, "+%zu", ci->addcount);
 621         fputs("</td><td class=\"num\" align=\"right\">", fp);
 622         fprintf(fp, "-%zu", ci->delcount);
 623         fputs("</td></tr>\n", fp);
 624 }
 625
 626 int
 627 writelog(FILE *fp, const git_oid *oid)
 628 {
 629         struct commitinfo *ci;
 630         git_revwalk *w = NULL;
 631         git_oid id;
 632         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 633         FILE *fpfile;
 634         int r;
 635
 636         git_revwalk_new(&w, repo);
 637         git_revwalk_push(w, oid);
 638         git_revwalk_simplify_first_parent(w);
 639
 640         while (!git_revwalk_next(&id, w)) {
 641                 relpath = "";
 642
 643                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 644                         break;
 645
 646                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 647                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 648                 if (r < 0 || (size_t)r >= sizeof(path))
 649                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 650                 r = access(path, F_OK);
 651
 652                 /* optimization: if there are no log lines to write and
 653                    the commit file already exists: skip the diffstat */
 654                 if (!nlogcommits && !r)
 655                         continue;
 656
 657                 if (!(ci = commitinfo_getbyoid(&id)))
 658                         break;
 659                 /* diffstat: for stagit HTML required for the log.html line */
 660                 if (commitinfo_getstats(ci) == -1)
 661                         goto err;
 662
 663                 if (nlogcommits < 0) {
 664                         writelogline(fp, ci);
 665                 } else if (nlogcommits > 0) {
 666                         writelogline(fp, ci);
 667                         nlogcommits--;
 668                         if (!nlogcommits && ci->parentoid[0])
 669                                 fputs("<tr><td></td><td colspan=\"5\">"
 670                                       "More commits remaining [...]</td>"
 671                                       "</tr>\n", fp);
 672                 }
 673
 674                 if (cachefile)
 675                         writelogline(wcachefp, ci);
 676
 677                 /* check if file exists if so skip it */
 678                 if (r) {
 679                         relpath = "../";
 680                         fpfile = efopen(path, "w");
 681                         writeheader(fpfile, ci->summary);
 682                         fputs("<pre>", fpfile);
 683                         printshowfile(fpfile, ci);
 684                         fputs("</pre>\n", fpfile);
 685                         writefooter(fpfile);
 686                         fclose(fpfile);
 687                 }
 688 err:
 689                 commitinfo_free(ci);
 690         }
 691         git_revwalk_free(w);
 692
 693         relpath = "";
 694
 695         return 0;
 696 }
 697
 698 void
 699 printcommitatom(FILE *fp, struct commitinfo *ci)
 700 {
 701         fputs("<entry>\n", fp);
 702
 703         fprintf(fp, "<id>%s</id>\n", ci->oid);
 704         if (ci->author) {
 705                 fputs("<published>", fp);
 706                 printtimez(fp, &(ci->author->when));
 707                 fputs("</published>\n", fp);
 708         }
 709         if (ci->committer) {
 710                 fputs("<updated>", fp);
 711                 printtimez(fp, &(ci->committer->when));
 712                 fputs("</updated>\n", fp);
 713         }
 714         if (ci->summary) {
 715                 fputs("<title type=\"text\">", fp);
 716                 xmlencode(fp, ci->summary, strlen(ci->summary));
 717                 fputs("</title>\n", fp);
 718         }
 719         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />\n",
 720                 ci->oid);
 721
 722         if (ci->author) {
 723                 fputs("<author>\n<name>", fp);
 724                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 725                 fputs("</name>\n<email>", fp);
 726                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 727                 fputs("</email>\n</author>\n", fp);
 728         }
 729
 730         fputs("<content type=\"text\">", fp);
 731         fprintf(fp, "commit %s\n", ci->oid);
 732         if (ci->parentoid[0])
 733                 fprintf(fp, "parent %s\n", ci->parentoid);
 734         if (ci->author) {
 735                 fputs("Author: ", fp);
 736                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 737                 fputs(" &lt;", fp);
 738                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 739                 fputs("&gt;\nDate:   ", fp);
 740                 printtime(fp, &(ci->author->when));
 741                 fputc('\n', fp);
 742         }
 743         if (ci->msg) {
 744                 fputc('\n', fp);
 745                 xmlencode(fp, ci->msg, strlen(ci->msg));
 746         }
 747         fputs("\n</content>\n</entry>\n", fp);
 748 }
 749
 750 int
 751 writeatom(FILE *fp)
 752 {
 753         struct commitinfo *ci;
 754         git_revwalk *w = NULL;
 755         git_oid id;
 756         size_t i, m = 100; /* last 'm' commits */
 757
 758         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 759               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 760         xmlencode(fp, strippedname, strlen(strippedname));
 761         fputs(", branch HEAD</title>\n<subtitle>", fp);
 762         xmlencode(fp, description, strlen(description));
 763         fputs("</subtitle>\n", fp);
 764
 765         git_revwalk_new(&w, repo);
 766         git_revwalk_push_head(w);
 767         git_revwalk_simplify_first_parent(w);
 768
 769         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 770                 if (!(ci = commitinfo_getbyoid(&id)))
 771                         break;
 772                 printcommitatom(fp, ci);
 773                 commitinfo_free(ci);
 774         }
 775         git_revwalk_free(w);
 776
 777         fputs("</feed>\n", fp);
 778
 779         return 0;
 780 }
 781
 782 int
 783 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 784 {
 785         char tmp[PATH_MAX] = "", *d;
 786         const char *p;
 787         int lc = 0;
 788         FILE *fp;
 789
 790         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 791                 errx(1, "path truncated: '%s'", fpath);
 792         if (!(d = dirname(tmp)))
 793                 err(1, "dirname");
 794         if (mkdirp(d))
 795                 return -1;
 796
 797         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 798                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 799                         errx(1, "path truncated: '../%s'", tmp);
 800         }
 801         relpath = tmp;
 802
 803         fp = efopen(fpath, "w");
 804         writeheader(fp, filename);
 805         fputs("<p> ", fp);
 806         xmlencode(fp, filename, strlen(filename));
 807         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 808         fputs("</p><hr/>", fp);
 809
 810         if (git_blob_is_binary((git_blob *)obj)) {
 811                 fputs("<p>Binary file.</p>\n", fp);
 812         } else {
 813                 lc = writeblobhtml(filename, fp, (git_blob *)obj);
 814                 if (ferror(fp))
 815                         err(1, "fwrite");
 816         }
 817         writefooter(fp);
 818         fclose(fp);
 819
 820         relpath = "";
 821
 822         return lc;
 823 }
 824
 825 const char *
 826 filemode(git_filemode_t m)
 827 {
 828         static char mode[11];
 829
 830         memset(mode, '-', sizeof(mode) - 1);
 831         mode[10] = '\0';
 832
 833         if (S_ISREG(m))
 834                 mode[0] = '-';
 835         else if (S_ISBLK(m))
 836                 mode[0] = 'b';
 837         else if (S_ISCHR(m))
 838                 mode[0] = 'c';
 839         else if (S_ISDIR(m))
 840                 mode[0] = 'd';
 841         else if (S_ISFIFO(m))
 842                 mode[0] = 'p';
 843         else if (S_ISLNK(m))
 844                 mode[0] = 'l';
 845         else if (S_ISSOCK(m))
 846                 mode[0] = 's';
 847         else
 848                 mode[0] = '?';
 849
 850         if (m & S_IRUSR) mode[1] = 'r';
 851         if (m & S_IWUSR) mode[2] = 'w';
 852         if (m & S_IXUSR) mode[3] = 'x';
 853         if (m & S_IRGRP) mode[4] = 'r';
 854         if (m & S_IWGRP) mode[5] = 'w';
 855         if (m & S_IXGRP) mode[6] = 'x';
 856         if (m & S_IROTH) mode[7] = 'r';
 857         if (m & S_IWOTH) mode[8] = 'w';
 858         if (m & S_IXOTH) mode[9] = 'x';
 859
 860         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 861         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 862         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 863
 864         return mode;
 865 }
 866
 867 int
 868 writefilestree(FILE *fp, git_tree *tree, const char *path)
 869 {
 870         const git_tree_entry *entry = NULL;
 871         git_submodule *module = NULL;
 872         git_object *obj = NULL;
 873         git_off_t filesize;
 874         const char *entryname;
 875         char filepath[PATH_MAX], entrypath[PATH_MAX];
 876         size_t count, i;
 877         int lc, r, ret;
 878
 879         count = git_tree_entrycount(tree);
 880         for (i = 0; i < count; i++) {
 881                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 882                     !(entryname = git_tree_entry_name(entry)))
 883                         return -1;
 884                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 885
 886                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 887                          entrypath);
 888                 if (r < 0 || (size_t)r >= sizeof(filepath))
 889                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 890
 891                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 892                         switch (git_object_type(obj)) {
 893                         case GIT_OBJ_BLOB:
 894                                 break;
 895                         case GIT_OBJ_TREE:
 896                                 /* NOTE: recurses */
 897                                 ret = writefilestree(fp, (git_tree *)obj,
 898                                                      entrypath);
 899                                 git_object_free(obj);
 900                                 if (ret)
 901                                         return ret;
 902                                 continue;
 903                         default:
 904                                 git_object_free(obj);
 905                                 continue;
 906                         }
 907
 908                         filesize = git_blob_rawsize((git_blob *)obj);
 909                         lc = writeblob(obj, filepath, entryname, filesize);
 910
 911                         fputs("<tr><td>", fp);
 912                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 913                         fprintf(fp, "</td><td><a href=\"%s", relpath);
 914                         xmlencode(fp, filepath, strlen(filepath));
 915                         fputs("\">", fp);
 916                         xmlencode(fp, entrypath, strlen(entrypath));
 917                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 918                         if (lc > 0)
 919                                 fprintf(fp, "%dL", lc);
 920                         else
 921                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 922                         fputs("</td></tr>\n", fp);
 923                         git_object_free(obj);
 924                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 925                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 926                                 relpath);
 927                         xmlencode(fp, entrypath, strlen(entrypath));
 928                         git_submodule_free(module);
 929                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 930                 }
 931         }
 932
 933         return 0;
 934 }
 935
 936 int
 937 writefiles(FILE *fp, const git_oid *id)
 938 {
 939         git_tree *tree = NULL;
 940         git_commit *commit = NULL;
 941         int ret = -1;
 942
 943         fputs("<table id=\"files\"><thead>\n<tr>"
 944               "<td><b>Mode</b></td><td><b>Name</b></td>"
 945               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 946               "</tr>\n</thead><tbody>\n", fp);
 947
 948         if (!git_commit_lookup(&commit, repo, id) &&
 949             !git_commit_tree(&tree, commit))
 950                 ret = writefilestree(fp, tree, "");
 951
 952         fputs("</tbody></table>", fp);
 953
 954         git_commit_free(commit);
 955         git_tree_free(tree);
 956
 957         return ret;
 958 }
 959
 960 int
 961 refs_cmp(const void *v1, const void *v2)
 962 {
 963         git_reference *r1 = (*(git_reference **)v1);
 964         git_reference *r2 = (*(git_reference **)v2);
 965         int r;
 966
 967         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 968                 return r;
 969
 970         return strcmp(git_reference_shorthand(r1),
 971                       git_reference_shorthand(r2));
 972 }
 973
 974 int
 975 writerefs(FILE *fp)
 976 {
 977         struct commitinfo *ci;
 978         const git_oid *id = NULL;
 979         git_object *obj = NULL;
 980         git_reference *dref = NULL, *r, *ref = NULL;
 981         git_reference_iterator *it = NULL;
 982         git_reference **refs = NULL;
 983         size_t count, i, j, refcount;
 984         const char *titles[] = { "Branches", "Tags" };
 985         const char *ids[] = { "branches", "tags" };
 986         const char *name;
 987
 988         if (git_reference_iterator_new(&it, repo))
 989                 return -1;
 990
 991         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 992                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 993                         err(1, "realloc");
 994                 refs[refcount] = ref;
 995         }
 996         git_reference_iterator_free(it);
 997
 998         /* sort by type then shorthand name */
 999         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
1000
1001         for (j = 0; j < 2; j++) {
1002                 for (i = 0, count = 0; i < refcount; i++) {
1003                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
1004                             !(git_reference_is_tag(refs[i]) && j == 1))
1005                                 continue;
1006
1007                         switch (git_reference_type(refs[i])) {
1008                         case GIT_REF_SYMBOLIC:
1009                                 if (git_reference_resolve(&dref, refs[i]))
1010                                         goto err;
1011                                 r = dref;
1012                                 break;
1013                         case GIT_REF_OID:
1014                                 r = refs[i];
1015                                 break;
1016                         default:
1017                                 continue;
1018                         }
1019                         if (!git_reference_target(r) ||
1020                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1021                                 goto err;
1022                         if (!(id = git_object_id(obj)))
1023                                 goto err;
1024                         if (!(ci = commitinfo_getbyoid(id)))
1025                                 break;
1026
1027                         /* print header if it has an entry (first). */
1028                         if (++count == 1) {
1029                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1030                                         "<thead>\n<tr><td><b>Name</b></td>"
1031                                         "<td><b>Last commit date</b></td>"
1032                                         "<td><b>Author</b></td>\n</tr>\n"
1033                                         "</thead><tbody>\n",
1034                                          titles[j], ids[j]);
1035                         }
1036
1037                         relpath = "";
1038                         name = git_reference_shorthand(r);
1039
1040                         fputs("<tr><td>", fp);
1041                         xmlencode(fp, name, strlen(name));
1042                         fputs("</td><td>", fp);
1043                         if (ci->author)
1044                                 printtimeshort(fp, &(ci->author->when));
1045                         fputs("</td><td>", fp);
1046                         if (ci->author)
1047                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1048                         fputs("</td></tr>\n", fp);
1049
1050                         relpath = "../";
1051
1052                         commitinfo_free(ci);
1053                         git_object_free(obj);
1054                         obj = NULL;
1055                         git_reference_free(dref);
1056                         dref = NULL;
1057                 }
1058                 /* table footer */
1059                 if (count)
1060                         fputs("</tbody></table><br/>", fp);
1061         }
1062
1063 err:
1064         git_object_free(obj);
1065         git_reference_free(dref);
1066
1067         for (i = 0; i < refcount; i++)
1068                 git_reference_free(refs[i]);
1069         free(refs);
1070
1071         return 0;
1072 }
1073
1074 void
1075 usage(char *argv0)
1076 {
1077         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1078         exit(1);
1079 }
1080
1081 int
1082 main(int argc, char *argv[])
1083 {
1084         git_object *obj = NULL;
1085         const git_oid *head = NULL;
1086         mode_t mask;
1087         FILE *fp, *fpread;
1088         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1089         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1090         size_t n;
1091         int i, fd;
1092
1093         for (i = 1; i < argc; i++) {
1094                 if (argv[i][0] != '-') {
1095                         if (repodir)
1096                                 usage(argv[0]);
1097                         repodir = argv[i];
1098                 } else if (argv[i][1] == 'c') {
1099                         if (nlogcommits > 0 || i + 1 >= argc)
1100                                 usage(argv[0]);
1101                         cachefile = argv[++i];
1102                 } else if (argv[i][1] == 'l') {
1103                         if (cachefile || i + 1 >= argc)
1104                                 usage(argv[0]);
1105                         errno = 0;
1106                         nlogcommits = strtoll(argv[++i], &p, 10);
1107                         if (argv[i][0] == '\0' || *p != '\0' ||
1108                             nlogcommits <= 0 || errno)
1109                                 usage(argv[0]);
1110                 }
1111         }
1112         if (!repodir)
1113                 usage(argv[0]);
1114
1115         if (!realpath(repodir, repodirabs))
1116                 err(1, "realpath");
1117
1118         git_libgit2_init();
1119
1120 #ifdef __OpenBSD__
1121         if (unveil(repodir, "r") == -1)
1122                 err(1, "unveil: %s", repodir);
1123         if (unveil(".", "rwc") == -1)
1124                 err(1, "unveil: .");
1125         if (cachefile && unveil(cachefile, "rwc") == -1)
1126                 err(1, "unveil: %s", cachefile);
1127
1128         if (cachefile) {
1129                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1130                         err(1, "pledge");
1131         } else {
1132                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1133                         err(1, "pledge");
1134         }
1135 #endif
1136
1137         if (git_repository_open_ext(&repo, repodir,
1138                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1139                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1140                 return 1;
1141         }
1142
1143         /* find HEAD */
1144         if (!git_revparse_single(&obj, repo, "HEAD"))
1145                 head = git_object_id(obj);
1146         git_object_free(obj);
1147
1148         /* use directory name as name */
1149         if ((name = strrchr(repodirabs, '/')))
1150                 name++;
1151         else
1152                 name = "";
1153
1154         /* copy css */
1155         char cwd[PATH_MAX];
1156         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1157         cp("/usr/local/share/stagit/syntax.css", strcat(cwd, "/syntax.css"));
1158         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1159         cp("/usr/local/share/stagit/style.css", strcat(cwd, "/style.css"));
1160
1161         /* strip .git suffix */
1162         if (!(strippedname = strdup(name)))
1163                 err(1, "strdup");
1164         if ((p = strrchr(strippedname, '.')))
1165                 if (!strcmp(p, ".git"))
1166                         *p = '\0';
1167
1168         /* read description or .git/description */
1169         joinpath(path, sizeof(path), repodir, "description");
1170         if (!(fpread = fopen(path, "r"))) {
1171                 joinpath(path, sizeof(path), repodir, ".git/description");
1172                 fpread = fopen(path, "r");
1173         }
1174         if (fpread) {
1175                 if (!fgets(description, sizeof(description), fpread))
1176                         description[0] = '\0';
1177                 fclose(fpread);
1178         }
1179
1180         /* read url or .git/url */
1181         joinpath(path, sizeof(path), repodir, "url");
1182         if (!(fpread = fopen(path, "r"))) {
1183                 joinpath(path, sizeof(path), repodir, ".git/url");
1184                 fpread = fopen(path, "r");
1185         }
1186         if (fpread) {
1187                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1188                         cloneurl[0] = '\0';
1189                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1190                 fclose(fpread);
1191         }
1192
1193         /* check LICENSE */
1194         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1195                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1196                     git_object_type(obj) == GIT_OBJ_BLOB)
1197                         license = licensefiles[i] + strlen("HEAD:");
1198                 git_object_free(obj);
1199         }
1200
1201         /* check README */
1202         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1203                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1204                     git_object_type(obj) == GIT_OBJ_BLOB)
1205                         readme = readmefiles[i] + strlen("HEAD:");
1206                 git_object_free(obj);
1207         }
1208
1209         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1210             git_object_type(obj) == GIT_OBJ_BLOB)
1211                 submodules = ".gitmodules";
1212         git_object_free(obj);
1213
1214         /* Generate tarball */
1215         char tarball[255];
1216         sprintf(tarball, "tar -zcf %s.tar.gz --ignore-failed-read --exclude='.git' %s",
1217                             strippedname, repodir);
1218         system(tarball);
1219
1220         /* log for HEAD */
1221         fp = efopen("log.html", "w");
1222         relpath = "";
1223         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1224         writeheader(fp, "Log");
1225         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1226               "<td><b>Commit</b></td>"
1227               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1228               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1229               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1230
1231         if (cachefile && head) {
1232                 /* read from cache file (does not need to exist) */
1233                 if ((rcachefp = fopen(cachefile, "r"))) {
1234                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1235                                 errx(1, "%s: no object id", cachefile);
1236                         if (git_oid_fromstr(&lastoid, lastoidstr))
1237                                 errx(1, "%s: invalid object id", cachefile);
1238                 }
1239
1240                 /* write log to (temporary) cache */
1241                 if ((fd = mkstemp(tmppath)) == -1)
1242                         err(1, "mkstemp");
1243                 if (!(wcachefp = fdopen(fd, "w")))
1244                         err(1, "fdopen: '%s'", tmppath);
1245                 /* write last commit id (HEAD) */
1246                 git_oid_tostr(buf, sizeof(buf), head);
1247                 fprintf(wcachefp, "%s\n", buf);
1248
1249                 writelog(fp, head);
1250
1251                 if (rcachefp) {
1252                         /* append previous log to log.html and the new cache */
1253                         while (!feof(rcachefp)) {
1254                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1255                                 if (ferror(rcachefp))
1256                                         err(1, "fread");
1257                                 if (fwrite(buf, 1, n, fp) != n ||
1258                                     fwrite(buf, 1, n, wcachefp) != n)
1259                                         err(1, "fwrite");
1260                         }
1261                         fclose(rcachefp);
1262                 }
1263                 fclose(wcachefp);
1264         } else {
1265                 if (head)
1266                         writelog(fp, head);
1267         }
1268
1269         fputs("</tbody></table>", fp);
1270         writefooter(fp);
1271         fclose(fp);
1272
1273         /* files for HEAD */
1274         fp = efopen("files.html", "w");
1275         writeheader(fp, "Files");
1276         if (head)
1277                 writefiles(fp, head);
1278         writefooter(fp);
1279         fclose(fp);
1280
1281         cp("files.html", "index.html");
1282
1283         /* summary page with branches and tags */
1284         fp = efopen("refs.html", "w");
1285         writeheader(fp, "Refs");
1286         writerefs(fp);
1287         writefooter(fp);
1288         fclose(fp);
1289
1290         /* Atom feed */
1291         fp = efopen("atom.xml", "w");
1292         writeatom(fp);
1293         fclose(fp);
1294
1295         /* rename new cache file on success */
1296         if (cachefile && head) {
1297                 if (rename(tmppath, cachefile))
1298                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1299                 umask((mask = umask(0)));
1300                 if (chmod(cachefile,
1301                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1302                         err(1, "chmod: '%s'", cachefile);
1303         }
1304
1305         /* cleanup */
1306         git_repository_free(repo);
1307         git_libgit2_shutdown();
1308
1309         return 0;
1310 }