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.min.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><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         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 391 }
 392
 393 void
 394 writefooter(FILE *fp)
 395 {
 396         fputs("</div>\n</body>\n</html>\n", fp);
 397 }
 398
 399 int
 400 call_py(const char *filename, FILE *fp, const char *s, size_t len)
 401 {
 402         // Flush HTML-file
 403         fflush(fp);
 404         // Copy STDOUT
 405         int stdout_copy = dup(1);
 406         // Redirect STDOUT
 407         dup2(fileno(fp), 1);
 408
 409         // Python Pygments script for syntax highlighting.
 410         FILE *child = popen("/usr/local/share/stagit/highlight.py", "w");
 411         if (child == NULL) {
 412                 printf("child is null: %s", strerror(errno));
 413                 exit(1);
 414         }
 415         // Give filename through STDIN:
 416         fprintf(child, "%s\n", filename);
 417         // Give code to highlight through STDIN:
 418         int lc;
 419         size_t i;
 420         for (i = 0; *s && i < len; s++, i++) {
 421                 if (*s == '\n') lc++;
 422                 fprintf(child, "%c", *s);
 423         }
 424
 425         pclose(child);
 426         fflush(stdout);
 427         // Give back STDOUT.
 428         dup2(stdout_copy, 1);
 429         return lc;
 430 }
 431
 432 int
 433 writeblobhtml(const char *filename, FILE *fp, const git_blob *blob)
 434 {
 435         int lc = 0;
 436         const char *s = git_blob_rawcontent(blob);
 437         git_off_t len = git_blob_rawsize(blob);
 438
 439         if (len > 0) {
 440                 lc = call_py(filename, fp, s, len);
 441         }
 442
 443         return lc;
 444 }
 445
 446 void
 447 printcommit(FILE *fp, struct commitinfo *ci)
 448 {
 449         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 450                 relpath, ci->oid, ci->oid);
 451
 452         if (ci->parentoid[0])
 453                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 454                         relpath, ci->parentoid, ci->parentoid);
 455
 456         if (ci->author) {
 457                 fputs("<b>Author:</b> ", fp);
 458                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 459                 fputs(" &lt;<a href=\"mailto:", fp);
 460                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 461                 fputs("\">", fp);
 462                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 463                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 464                 printtime(fp, &(ci->author->when));
 465                 fputc('\n', fp);
 466         }
 467         if (ci->msg) {
 468                 fputc('\n', fp);
 469                 xmlencode(fp, ci->msg, strlen(ci->msg));
 470                 fputc('\n', fp);
 471         }
 472 }
 473
 474 void
 475 printshowfile(FILE *fp, struct commitinfo *ci)
 476 {
 477         const git_diff_delta *delta;
 478         const git_diff_hunk *hunk;
 479         const git_diff_line *line;
 480         git_patch *patch;
 481         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 482         char linestr[80];
 483         int c;
 484
 485         printcommit(fp, ci);
 486
 487         if (!ci->deltas)
 488                 return;
 489
 490         if (ci->filecount > 1000   ||
 491             ci->ndeltas   > 1000   ||
 492             ci->addcount  > 100000 ||
 493             ci->delcount  > 100000) {
 494                 fputs("Diff is too large, output suppressed.\n", fp);
 495                 return;
 496         }
 497
 498         /* diff stat */
 499         fputs("<b>Diffstat:</b>\n<table>", fp);
 500         for (i = 0; i < ci->ndeltas; i++) {
 501                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 502
 503                 switch (delta->status) {
 504                 case GIT_DELTA_ADDED:      c = 'A'; break;
 505                 case GIT_DELTA_COPIED:     c = 'C'; break;
 506                 case GIT_DELTA_DELETED:    c = 'D'; break;
 507                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 508                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 509                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 510                 default:                   c = ' '; break;
 511                 }
 512                 if (c == ' ')
 513                         fprintf(fp, "<tr><td>%c", c);
 514                 else
 515                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 516
 517                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 518                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 519                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 520                         fputs(" -&gt; ", fp);
 521                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 522                 }
 523
 524                 add = ci->deltas[i]->addcount;
 525                 del = ci->deltas[i]->delcount;
 526                 changed = add + del;
 527                 total = sizeof(linestr) - 2;
 528                 if (changed > total) {
 529                         if (add)
 530                                 add = ((float)total / changed * add) + 1;
 531                         if (del)
 532                                 del = ((float)total / changed * del) + 1;
 533                 }
 534                 memset(&linestr, '+', add);
 535                 memset(&linestr[add], '-', del);
 536
 537                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 538                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 539                 fwrite(&linestr, 1, add, fp);
 540                 fputs("</span><span class=\"d\">", fp);
 541                 fwrite(&linestr[add], 1, del, fp);
 542                 fputs("</span></td></tr>\n", fp);
 543         }
 544         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 545                 ci->filecount, ci->filecount == 1 ? "" : "s",
 546                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 547                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 548
 549         fputs("<hr/>", fp);
 550
 551         for (i = 0; i < ci->ndeltas; i++) {
 552                 patch = ci->deltas[i]->patch;
 553                 delta = git_patch_get_delta(patch);
 554                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 555                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 556                 fputs(".html\">", fp);
 557                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 558                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 559                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 560                 fprintf(fp, ".html\">");
 561                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 562                 fprintf(fp, "</a></b>\n");
 563
 564                 /* check binary data */
 565                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 566                         fputs("Binary files differ.\n", fp);
 567                         continue;
 568                 }
 569
 570                 nhunks = git_patch_num_hunks(patch);
 571                 for (j = 0; j < nhunks; j++) {
 572                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 573                                 break;
 574
 575                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 576                         xmlencode(fp, hunk->header, hunk->header_len);
 577                         fputs("</a>", fp);
 578
 579                         for (k = 0; ; k++) {
 580                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 581                                         break;
 582                                 if (line->old_lineno == -1)
 583                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 584                                                 i, j, k, i, j, k);
 585                                 else if (line->new_lineno == -1)
 586                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 587                                                 i, j, k, i, j, k);
 588                                 else
 589                                         fputc(' ', fp);
 590                                 xmlencode(fp, line->content, line->content_len);
 591                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 592                                         fputs("</a>", fp);
 593                         }
 594                 }
 595         }
 596 }
 597
 598 void
 599 writelogline(FILE *fp, struct commitinfo *ci)
 600 {
 601         fputs("<tr><td>", fp);
 602         if (ci->author)
 603                 printtimeshort(fp, &(ci->author->when));
 604         fputs("</td><td>", fp);
 605         if (ci->summary) {
 606                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 607                 xmlencode(fp, ci->summary, strlen(ci->summary));
 608                 fputs("</a>", fp);
 609         }
 610         fputs("</td><td>", fp);
 611         if (ci->author)
 612                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 613         fputs("</td><td class=\"num\" align=\"right\">", fp);
 614         fprintf(fp, "%zu", ci->filecount);
 615         fputs("</td><td class=\"num\" align=\"right\">", fp);
 616         fprintf(fp, "+%zu", ci->addcount);
 617         fputs("</td><td class=\"num\" align=\"right\">", fp);
 618         fprintf(fp, "-%zu", ci->delcount);
 619         fputs("</td></tr>\n", fp);
 620 }
 621
 622 int
 623 writelog(FILE *fp, const git_oid *oid)
 624 {
 625         struct commitinfo *ci;
 626         git_revwalk *w = NULL;
 627         git_oid id;
 628         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 629         FILE *fpfile;
 630         int r;
 631
 632         git_revwalk_new(&w, repo);
 633         git_revwalk_push(w, oid);
 634         git_revwalk_simplify_first_parent(w);
 635
 636         while (!git_revwalk_next(&id, w)) {
 637                 relpath = "";
 638
 639                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 640                         break;
 641
 642                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 643                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 644                 if (r < 0 || (size_t)r >= sizeof(path))
 645                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 646                 r = access(path, F_OK);
 647
 648                 /* optimization: if there are no log lines to write and
 649                    the commit file already exists: skip the diffstat */
 650                 if (!nlogcommits && !r)
 651                         continue;
 652
 653                 if (!(ci = commitinfo_getbyoid(&id)))
 654                         break;
 655                 /* diffstat: for stagit HTML required for the log.html line */
 656                 if (commitinfo_getstats(ci) == -1)
 657                         goto err;
 658
 659                 if (nlogcommits < 0) {
 660                         writelogline(fp, ci);
 661                 } else if (nlogcommits > 0) {
 662                         writelogline(fp, ci);
 663                         nlogcommits--;
 664                         if (!nlogcommits && ci->parentoid[0])
 665                                 fputs("<tr><td></td><td colspan=\"5\">"
 666                                       "More commits remaining [...]</td>"
 667                                       "</tr>\n", fp);
 668                 }
 669
 670                 if (cachefile)
 671                         writelogline(wcachefp, ci);
 672
 673                 /* check if file exists if so skip it */
 674                 if (r) {
 675                         relpath = "../";
 676                         fpfile = efopen(path, "w");
 677                         writeheader(fpfile, ci->summary);
 678                         fputs("<pre>", fpfile);
 679                         printshowfile(fpfile, ci);
 680                         fputs("</pre>\n", fpfile);
 681                         writefooter(fpfile);
 682                         fclose(fpfile);
 683                 }
 684 err:
 685                 commitinfo_free(ci);
 686         }
 687         git_revwalk_free(w);
 688
 689         relpath = "";
 690
 691         return 0;
 692 }
 693
 694 void
 695 printcommitatom(FILE *fp, struct commitinfo *ci)
 696 {
 697         fputs("<entry>\n", fp);
 698
 699         fprintf(fp, "<id>%s</id>\n", ci->oid);
 700         if (ci->author) {
 701                 fputs("<published>", fp);
 702                 printtimez(fp, &(ci->author->when));
 703                 fputs("</published>\n", fp);
 704         }
 705         if (ci->committer) {
 706                 fputs("<updated>", fp);
 707                 printtimez(fp, &(ci->committer->when));
 708                 fputs("</updated>\n", fp);
 709         }
 710         if (ci->summary) {
 711                 fputs("<title type=\"text\">", fp);
 712                 xmlencode(fp, ci->summary, strlen(ci->summary));
 713                 fputs("</title>\n", fp);
 714         }
 715         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />\n",
 716                 ci->oid);
 717
 718         if (ci->author) {
 719                 fputs("<author>\n<name>", fp);
 720                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 721                 fputs("</name>\n<email>", fp);
 722                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 723                 fputs("</email>\n</author>\n", fp);
 724         }
 725
 726         fputs("<content type=\"text\">", fp);
 727         fprintf(fp, "commit %s\n", ci->oid);
 728         if (ci->parentoid[0])
 729                 fprintf(fp, "parent %s\n", ci->parentoid);
 730         if (ci->author) {
 731                 fputs("Author: ", fp);
 732                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 733                 fputs(" &lt;", fp);
 734                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 735                 fputs("&gt;\nDate:   ", fp);
 736                 printtime(fp, &(ci->author->when));
 737                 fputc('\n', fp);
 738         }
 739         if (ci->msg) {
 740                 fputc('\n', fp);
 741                 xmlencode(fp, ci->msg, strlen(ci->msg));
 742         }
 743         fputs("\n</content>\n</entry>\n", fp);
 744 }
 745
 746 int
 747 writeatom(FILE *fp)
 748 {
 749         struct commitinfo *ci;
 750         git_revwalk *w = NULL;
 751         git_oid id;
 752         size_t i, m = 100; /* last 'm' commits */
 753
 754         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 755               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 756         xmlencode(fp, strippedname, strlen(strippedname));
 757         fputs(", branch HEAD</title>\n<subtitle>", fp);
 758         xmlencode(fp, description, strlen(description));
 759         fputs("</subtitle>\n", fp);
 760
 761         git_revwalk_new(&w, repo);
 762         git_revwalk_push_head(w);
 763         git_revwalk_simplify_first_parent(w);
 764
 765         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 766                 if (!(ci = commitinfo_getbyoid(&id)))
 767                         break;
 768                 printcommitatom(fp, ci);
 769                 commitinfo_free(ci);
 770         }
 771         git_revwalk_free(w);
 772
 773         fputs("</feed>\n", fp);
 774
 775         return 0;
 776 }
 777
 778 int
 779 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 780 {
 781         char tmp[PATH_MAX] = "", *d;
 782         const char *p;
 783         int lc = 0;
 784         FILE *fp;
 785
 786         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 787                 errx(1, "path truncated: '%s'", fpath);
 788         if (!(d = dirname(tmp)))
 789                 err(1, "dirname");
 790         if (mkdirp(d))
 791                 return -1;
 792
 793         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 794                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 795                         errx(1, "path truncated: '../%s'", tmp);
 796         }
 797         relpath = tmp;
 798
 799         fp = efopen(fpath, "w");
 800         writeheader(fp, filename);
 801         fputs("<p> ", fp);
 802         xmlencode(fp, filename, strlen(filename));
 803         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 804         fputs("</p><hr/>", fp);
 805
 806         if (git_blob_is_binary((git_blob *)obj)) {
 807                 fputs("<p>Binary file.</p>\n", fp);
 808         } else {
 809                 lc = writeblobhtml(filename, fp, (git_blob *)obj);
 810                 if (ferror(fp))
 811                         err(1, "fwrite");
 812         }
 813         writefooter(fp);
 814         fclose(fp);
 815
 816         relpath = "";
 817
 818         return lc;
 819 }
 820
 821 const char *
 822 filemode(git_filemode_t m)
 823 {
 824         static char mode[11];
 825
 826         memset(mode, '-', sizeof(mode) - 1);
 827         mode[10] = '\0';
 828
 829         if (S_ISREG(m))
 830                 mode[0] = '-';
 831         else if (S_ISBLK(m))
 832                 mode[0] = 'b';
 833         else if (S_ISCHR(m))
 834                 mode[0] = 'c';
 835         else if (S_ISDIR(m))
 836                 mode[0] = 'd';
 837         else if (S_ISFIFO(m))
 838                 mode[0] = 'p';
 839         else if (S_ISLNK(m))
 840                 mode[0] = 'l';
 841         else if (S_ISSOCK(m))
 842                 mode[0] = 's';
 843         else
 844                 mode[0] = '?';
 845
 846         if (m & S_IRUSR) mode[1] = 'r';
 847         if (m & S_IWUSR) mode[2] = 'w';
 848         if (m & S_IXUSR) mode[3] = 'x';
 849         if (m & S_IRGRP) mode[4] = 'r';
 850         if (m & S_IWGRP) mode[5] = 'w';
 851         if (m & S_IXGRP) mode[6] = 'x';
 852         if (m & S_IROTH) mode[7] = 'r';
 853         if (m & S_IWOTH) mode[8] = 'w';
 854         if (m & S_IXOTH) mode[9] = 'x';
 855
 856         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 857         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 858         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 859
 860         return mode;
 861 }
 862
 863 int
 864 writefilestree(FILE *fp, git_tree *tree, const char *path)
 865 {
 866         const git_tree_entry *entry = NULL;
 867         git_submodule *module = NULL;
 868         git_object *obj = NULL;
 869         git_off_t filesize;
 870         const char *entryname;
 871         char filepath[PATH_MAX], entrypath[PATH_MAX];
 872         size_t count, i;
 873         int lc, r, ret;
 874
 875         count = git_tree_entrycount(tree);
 876         for (i = 0; i < count; i++) {
 877                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 878                     !(entryname = git_tree_entry_name(entry)))
 879                         return -1;
 880                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 881
 882                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 883                          entrypath);
 884                 if (r < 0 || (size_t)r >= sizeof(filepath))
 885                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 886
 887                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 888                         switch (git_object_type(obj)) {
 889                         case GIT_OBJ_BLOB:
 890                                 break;
 891                         case GIT_OBJ_TREE:
 892                                 /* NOTE: recurses */
 893                                 ret = writefilestree(fp, (git_tree *)obj,
 894                                                      entrypath);
 895                                 git_object_free(obj);
 896                                 if (ret)
 897                                         return ret;
 898                                 continue;
 899                         default:
 900                                 git_object_free(obj);
 901                                 continue;
 902                         }
 903
 904                         filesize = git_blob_rawsize((git_blob *)obj);
 905                         lc = writeblob(obj, filepath, entryname, filesize);
 906
 907                         fputs("<tr><td>", fp);
 908                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 909                         fprintf(fp, "</td><td><a href=\"%s", relpath);
 910                         xmlencode(fp, filepath, strlen(filepath));
 911                         fputs("\">", fp);
 912                         xmlencode(fp, entrypath, strlen(entrypath));
 913                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 914                         if (lc > 0)
 915                                 fprintf(fp, "%dL", lc);
 916                         else
 917                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 918                         fputs("</td></tr>\n", fp);
 919                         git_object_free(obj);
 920                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 921                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 922                                 relpath);
 923                         xmlencode(fp, entrypath, strlen(entrypath));
 924                         git_submodule_free(module);
 925                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 926                 }
 927         }
 928
 929         return 0;
 930 }
 931
 932 int
 933 writefiles(FILE *fp, const git_oid *id)
 934 {
 935         git_tree *tree = NULL;
 936         git_commit *commit = NULL;
 937         int ret = -1;
 938
 939         fputs("<table id=\"files\"><thead>\n<tr>"
 940               "<td><b>Mode</b></td><td><b>Name</b></td>"
 941               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 942               "</tr>\n</thead><tbody>\n", fp);
 943
 944         if (!git_commit_lookup(&commit, repo, id) &&
 945             !git_commit_tree(&tree, commit))
 946                 ret = writefilestree(fp, tree, "");
 947
 948         fputs("</tbody></table>", fp);
 949
 950         git_commit_free(commit);
 951         git_tree_free(tree);
 952
 953         return ret;
 954 }
 955
 956 int
 957 refs_cmp(const void *v1, const void *v2)
 958 {
 959         git_reference *r1 = (*(git_reference **)v1);
 960         git_reference *r2 = (*(git_reference **)v2);
 961         int r;
 962
 963         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 964                 return r;
 965
 966         return strcmp(git_reference_shorthand(r1),
 967                       git_reference_shorthand(r2));
 968 }
 969
 970 int
 971 writerefs(FILE *fp)
 972 {
 973         struct commitinfo *ci;
 974         const git_oid *id = NULL;
 975         git_object *obj = NULL;
 976         git_reference *dref = NULL, *r, *ref = NULL;
 977         git_reference_iterator *it = NULL;
 978         git_reference **refs = NULL;
 979         size_t count, i, j, refcount;
 980         const char *titles[] = { "Branches", "Tags" };
 981         const char *ids[] = { "branches", "tags" };
 982         const char *name;
 983
 984         if (git_reference_iterator_new(&it, repo))
 985                 return -1;
 986
 987         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 988                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 989                         err(1, "realloc");
 990                 refs[refcount] = ref;
 991         }
 992         git_reference_iterator_free(it);
 993
 994         /* sort by type then shorthand name */
 995         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 996
 997         for (j = 0; j < 2; j++) {
 998                 for (i = 0, count = 0; i < refcount; i++) {
 999                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
1000                             !(git_reference_is_tag(refs[i]) && j == 1))
1001                                 continue;
1002
1003                         switch (git_reference_type(refs[i])) {
1004                         case GIT_REF_SYMBOLIC:
1005                                 if (git_reference_resolve(&dref, refs[i]))
1006                                         goto err;
1007                                 r = dref;
1008                                 break;
1009                         case GIT_REF_OID:
1010                                 r = refs[i];
1011                                 break;
1012                         default:
1013                                 continue;
1014                         }
1015                         if (!git_reference_target(r) ||
1016                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1017                                 goto err;
1018                         if (!(id = git_object_id(obj)))
1019                                 goto err;
1020                         if (!(ci = commitinfo_getbyoid(id)))
1021                                 break;
1022
1023                         /* print header if it has an entry (first). */
1024                         if (++count == 1) {
1025                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1026                                         "<thead>\n<tr><td><b>Name</b></td>"
1027                                         "<td><b>Last commit date</b></td>"
1028                                         "<td><b>Author</b></td>\n</tr>\n"
1029                                         "</thead><tbody>\n",
1030                                          titles[j], ids[j]);
1031                         }
1032
1033                         relpath = "";
1034                         name = git_reference_shorthand(r);
1035
1036                         fputs("<tr><td>", fp);
1037                         xmlencode(fp, name, strlen(name));
1038                         fputs("</td><td>", fp);
1039                         if (ci->author)
1040                                 printtimeshort(fp, &(ci->author->when));
1041                         fputs("</td><td>", fp);
1042                         if (ci->author)
1043                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1044                         fputs("</td></tr>\n", fp);
1045
1046                         relpath = "../";
1047
1048                         commitinfo_free(ci);
1049                         git_object_free(obj);
1050                         obj = NULL;
1051                         git_reference_free(dref);
1052                         dref = NULL;
1053                 }
1054                 /* table footer */
1055                 if (count)
1056                         fputs("</tbody></table><br/>", fp);
1057         }
1058
1059 err:
1060         git_object_free(obj);
1061         git_reference_free(dref);
1062
1063         for (i = 0; i < refcount; i++)
1064                 git_reference_free(refs[i]);
1065         free(refs);
1066
1067         return 0;
1068 }
1069
1070 void
1071 usage(char *argv0)
1072 {
1073         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1074         exit(1);
1075 }
1076
1077 int
1078 main(int argc, char *argv[])
1079 {
1080         git_object *obj = NULL;
1081         const git_oid *head = NULL;
1082         mode_t mask;
1083         FILE *fp, *fpread;
1084         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1085         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1086         size_t n;
1087         int i, fd;
1088
1089         for (i = 1; i < argc; i++) {
1090                 if (argv[i][0] != '-') {
1091                         if (repodir)
1092                                 usage(argv[0]);
1093                         repodir = argv[i];
1094                 } else if (argv[i][1] == 'c') {
1095                         if (nlogcommits > 0 || i + 1 >= argc)
1096                                 usage(argv[0]);
1097                         cachefile = argv[++i];
1098                 } else if (argv[i][1] == 'l') {
1099                         if (cachefile || i + 1 >= argc)
1100                                 usage(argv[0]);
1101                         errno = 0;
1102                         nlogcommits = strtoll(argv[++i], &p, 10);
1103                         if (argv[i][0] == '\0' || *p != '\0' ||
1104                             nlogcommits <= 0 || errno)
1105                                 usage(argv[0]);
1106                 }
1107         }
1108         if (!repodir)
1109                 usage(argv[0]);
1110
1111         if (!realpath(repodir, repodirabs))
1112                 err(1, "realpath");
1113
1114         git_libgit2_init();
1115
1116 #ifdef __OpenBSD__
1117         if (unveil(repodir, "r") == -1)
1118                 err(1, "unveil: %s", repodir);
1119         if (unveil(".", "rwc") == -1)
1120                 err(1, "unveil: .");
1121         if (cachefile && unveil(cachefile, "rwc") == -1)
1122                 err(1, "unveil: %s", cachefile);
1123
1124         if (cachefile) {
1125                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1126                         err(1, "pledge");
1127         } else {
1128                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1129                         err(1, "pledge");
1130         }
1131 #endif
1132
1133         if (git_repository_open_ext(&repo, repodir,
1134                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1135                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1136                 return 1;
1137         }
1138
1139         /* find HEAD */
1140         if (!git_revparse_single(&obj, repo, "HEAD"))
1141                 head = git_object_id(obj);
1142         git_object_free(obj);
1143
1144         /* use directory name as name */
1145         if ((name = strrchr(repodirabs, '/')))
1146                 name++;
1147         else
1148                 name = "";
1149
1150         /* copy css */
1151         char cwd[PATH_MAX];
1152         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1153         cp("/usr/local/share/stagit/syntax.css", strcat(cwd, "/syntax.css"));
1154         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1155         cp("/usr/local/share/stagit/style.min.css", strcat(cwd, "/style.min.css"));
1156
1157         /* strip .git suffix */
1158         if (!(strippedname = strdup(name)))
1159                 err(1, "strdup");
1160         if ((p = strrchr(strippedname, '.')))
1161                 if (!strcmp(p, ".git"))
1162                         *p = '\0';
1163
1164         /* read description or .git/description */
1165         joinpath(path, sizeof(path), repodir, "description");
1166         if (!(fpread = fopen(path, "r"))) {
1167                 joinpath(path, sizeof(path), repodir, ".git/description");
1168                 fpread = fopen(path, "r");
1169         }
1170         if (fpread) {
1171                 if (!fgets(description, sizeof(description), fpread))
1172                         description[0] = '\0';
1173                 fclose(fpread);
1174         }
1175
1176         /* read url or .git/url */
1177         joinpath(path, sizeof(path), repodir, "url");
1178         if (!(fpread = fopen(path, "r"))) {
1179                 joinpath(path, sizeof(path), repodir, ".git/url");
1180                 fpread = fopen(path, "r");
1181         }
1182         if (fpread) {
1183                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1184                         cloneurl[0] = '\0';
1185                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1186                 fclose(fpread);
1187         }
1188
1189         /* check LICENSE */
1190         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1191                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1192                     git_object_type(obj) == GIT_OBJ_BLOB)
1193                         license = licensefiles[i] + strlen("HEAD:");
1194                 git_object_free(obj);
1195         }
1196
1197         /* check README */
1198         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1199                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1200                     git_object_type(obj) == GIT_OBJ_BLOB)
1201                         readme = readmefiles[i] + strlen("HEAD:");
1202                 git_object_free(obj);
1203         }
1204
1205         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1206             git_object_type(obj) == GIT_OBJ_BLOB)
1207                 submodules = ".gitmodules";
1208         git_object_free(obj);
1209
1210         /* log for HEAD */
1211         fp = efopen("log.html", "w");
1212         relpath = "";
1213         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1214         writeheader(fp, "Log");
1215         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1216               "<td><b>Commit</b></td>"
1217               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1218               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1219               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1220
1221         if (cachefile && head) {
1222                 /* read from cache file (does not need to exist) */
1223                 if ((rcachefp = fopen(cachefile, "r"))) {
1224                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1225                                 errx(1, "%s: no object id", cachefile);
1226                         if (git_oid_fromstr(&lastoid, lastoidstr))
1227                                 errx(1, "%s: invalid object id", cachefile);
1228                 }
1229
1230                 /* write log to (temporary) cache */
1231                 if ((fd = mkstemp(tmppath)) == -1)
1232                         err(1, "mkstemp");
1233                 if (!(wcachefp = fdopen(fd, "w")))
1234                         err(1, "fdopen: '%s'", tmppath);
1235                 /* write last commit id (HEAD) */
1236                 git_oid_tostr(buf, sizeof(buf), head);
1237                 fprintf(wcachefp, "%s\n", buf);
1238
1239                 writelog(fp, head);
1240
1241                 if (rcachefp) {
1242                         /* append previous log to log.html and the new cache */
1243                         while (!feof(rcachefp)) {
1244                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1245                                 if (ferror(rcachefp))
1246                                         err(1, "fread");
1247                                 if (fwrite(buf, 1, n, fp) != n ||
1248                                     fwrite(buf, 1, n, wcachefp) != n)
1249                                         err(1, "fwrite");
1250                         }
1251                         fclose(rcachefp);
1252                 }
1253                 fclose(wcachefp);
1254         } else {
1255                 if (head)
1256                         writelog(fp, head);
1257         }
1258
1259         fputs("</tbody></table>", fp);
1260         writefooter(fp);
1261         fclose(fp);
1262
1263         /* files for HEAD */
1264         fp = efopen("files.html", "w");
1265         writeheader(fp, "Files");
1266         if (head)
1267                 writefiles(fp, head);
1268         writefooter(fp);
1269         fclose(fp);
1270
1271         /* summary page with branches and tags */
1272         fp = efopen("refs.html", "w");
1273         writeheader(fp, "Refs");
1274         writerefs(fp);
1275         writefooter(fp);
1276         fclose(fp);
1277
1278         /* Atom feed */
1279         fp = efopen("atom.xml", "w");
1280         writeatom(fp);
1281         fclose(fp);
1282
1283         /* rename new cache file on success */
1284         if (cachefile && head) {
1285                 if (rename(tmppath, cachefile))
1286                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1287                 umask((mask = umask(0)));
1288                 if (chmod(cachefile,
1289                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1290                         err(1, "chmod: '%s'", cachefile);
1291         }
1292
1293         /* cleanup */
1294         git_repository_free(repo);
1295         git_libgit2_shutdown();
1296
1297         return 0;
1298 }