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 <stdbool.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #include <unistd.h>
  15
  16 #include <git2.h>
  17
  18 #ifdef HAS_CMARK
  19 #include <cmark-gfm.h>
  20 #endif
  21
  22 #include "compat.h"
  23 #include "cp.h"
  24
  25 struct deltainfo {
  26         git_patch *patch;
  27
  28         size_t addcount;
  29         size_t delcount;
  30 };
  31
  32 struct commitinfo {
  33         const git_oid *id;
  34
  35         char oid[GIT_OID_HEXSZ + 1];
  36         char parentoid[GIT_OID_HEXSZ + 1];
  37
  38         const git_signature *author;
  39         const git_signature *committer;
  40         const char          *summary;
  41         const char          *msg;
  42
  43         git_diff   *diff;
  44         git_commit *commit;
  45         git_commit *parent;
  46         git_tree   *commit_tree;
  47         git_tree   *parent_tree;
  48
  49         size_t addcount;
  50         size_t delcount;
  51         size_t filecount;
  52
  53         struct deltainfo **deltas;
  54         size_t ndeltas;
  55 };
  56
  57 static git_repository *repo;
  58
  59 static const char *baseurl = ""; /* base URL to make absolute RSS/Atom URI */
  60 static const char *relpath = "";
  61 static const char *repodir;
  62
  63 static char *name = "";
  64 static char *strippedname = "";
  65 static char description[255];
  66 static char cloneurl[1024];
  67 static char *submodules;
  68 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
  69 static char *license;
  70 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
  71 static char *readme;
  72 static long long nlogcommits = -1; /* < 0 indicates not used */
  73
  74 bool htmlized; /* true if markdoown converted to HTML */
  75 static char oldfilename[PATH_MAX]; /* filename of the last file */
  76
  77 /* cache */
  78 static git_oid lastoid;
  79 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  80 static FILE *rcachefp, *wcachefp;
  81 static const char *cachefile;
  82
  83 void
  84 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  85 {
  86         int r;
  87
  88         r = snprintf(buf, bufsiz, "%s%s%s",
  89                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  90         if (r < 0 || (size_t)r >= bufsiz)
  91                 errx(1, "path truncated: '%s%s%s'",
  92                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  93 }
  94
  95 void
  96 deltainfo_free(struct deltainfo *di)
  97 {
  98         if (!di)
  99                 return;
 100         git_patch_free(di->patch);
 101         memset(di, 0, sizeof(*di));
 102         free(di);
 103 }
 104
 105 int
 106 commitinfo_getstats(struct commitinfo *ci)
 107 {
 108         struct deltainfo *di;
 109         git_diff_options opts;
 110         git_diff_find_options fopts;
 111         const git_diff_delta *delta;
 112         const git_diff_hunk *hunk;
 113         const git_diff_line *line;
 114         git_patch *patch = NULL;
 115         size_t ndeltas, nhunks, nhunklines;
 116         size_t i, j, k;
 117
 118         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 119                 goto err;
 120         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 121                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 122                         ci->parent = NULL;
 123                         ci->parent_tree = NULL;
 124                 }
 125         }
 126
 127         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 128         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 129                       GIT_DIFF_IGNORE_SUBMODULES |
 130                       GIT_DIFF_INCLUDE_TYPECHANGE;
 131         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 132                 goto err;
 133
 134         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 135                 goto err;
 136         /* find renames and copies, exact matches (no heuristic) for renames. */
 137         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
 138                        GIT_DIFF_FIND_EXACT_MATCH_ONLY;
 139         if (git_diff_find_similar(ci->diff, &fopts))
 140                 goto err;
 141
 142         ndeltas = git_diff_num_deltas(ci->diff);
 143         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 144                 err(1, "calloc");
 145
 146         for (i = 0; i < ndeltas; i++) {
 147                 if (git_patch_from_diff(&patch, ci->diff, i))
 148                         goto err;
 149
 150                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 151                         err(1, "calloc");
 152                 di->patch = patch;
 153                 ci->deltas[i] = di;
 154
 155                 delta = git_patch_get_delta(patch);
 156
 157                 /* skip stats for binary data */
 158                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 159                         continue;
 160
 161                 nhunks = git_patch_num_hunks(patch);
 162                 for (j = 0; j < nhunks; j++) {
 163                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 164                                 break;
 165                         for (k = 0; ; k++) {
 166                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 167                                         break;
 168                                 if (line->old_lineno == -1) {
 169                                         di->addcount++;
 170                                         ci->addcount++;
 171                                 } else if (line->new_lineno == -1) {
 172                                         di->delcount++;
 173                                         ci->delcount++;
 174                                 }
 175                         }
 176                 }
 177         }
 178         ci->ndeltas = i;
 179         ci->filecount = i;
 180
 181         return 0;
 182
 183 err:
 184         git_diff_free(ci->diff);
 185         ci->diff = NULL;
 186         git_tree_free(ci->commit_tree);
 187         ci->commit_tree = NULL;
 188         git_tree_free(ci->parent_tree);
 189         ci->parent_tree = NULL;
 190         git_commit_free(ci->parent);
 191         ci->parent = NULL;
 192
 193         if (ci->deltas)
 194                 for (i = 0; i < ci->ndeltas; i++)
 195                         deltainfo_free(ci->deltas[i]);
 196         free(ci->deltas);
 197         ci->deltas = NULL;
 198         ci->ndeltas = 0;
 199         ci->addcount = 0;
 200         ci->delcount = 0;
 201         ci->filecount = 0;
 202
 203         return -1;
 204 }
 205
 206 void
 207 commitinfo_free(struct commitinfo *ci)
 208 {
 209         size_t i;
 210
 211         if (!ci)
 212                 return;
 213         if (ci->deltas)
 214                 for (i = 0; i < ci->ndeltas; i++)
 215                         deltainfo_free(ci->deltas[i]);
 216
 217         free(ci->deltas);
 218         git_diff_free(ci->diff);
 219         git_tree_free(ci->commit_tree);
 220         git_tree_free(ci->parent_tree);
 221         git_commit_free(ci->commit);
 222         git_commit_free(ci->parent);
 223         memset(ci, 0, sizeof(*ci));
 224         free(ci);
 225 }
 226
 227 struct commitinfo *
 228 commitinfo_getbyoid(const git_oid *id)
 229 {
 230         struct commitinfo *ci;
 231
 232         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 233                 err(1, "calloc");
 234
 235         if (git_commit_lookup(&(ci->commit), repo, id))
 236                 goto err;
 237         ci->id = id;
 238
 239         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 240         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 241
 242         ci->author = git_commit_author(ci->commit);
 243         ci->committer = git_commit_committer(ci->commit);
 244         ci->summary = git_commit_summary(ci->commit);
 245         ci->msg = git_commit_message(ci->commit);
 246
 247         return ci;
 248
 249 err:
 250         commitinfo_free(ci);
 251
 252         return NULL;
 253 }
 254
 255 FILE *
 256 efopen(const char *name, const char *flags)
 257 {
 258         FILE *fp;
 259
 260         if (!(fp = fopen(name, flags)))
 261                 err(1, "fopen: '%s'", name);
 262
 263         return fp;
 264 }
 265
 266 /* Escape characters below as HTML 2.0 / XML 1.0. */
 267 void
 268 xmlencode(FILE *fp, const char *s, size_t len)
 269 {
 270         size_t i;
 271
 272         for (i = 0; *s && i < len; s++, i++) {
 273                 switch(*s) {
 274                 case '<':  fputs("&lt;",   fp); break;
 275                 case '>':  fputs("&gt;",   fp); break;
 276                 case '\'': fputs("&#39;",  fp); break;
 277                 case '&':  fputs("&amp;",  fp); break;
 278                 case '"':  fputs("&quot;", fp); break;
 279                 default:   fputc(*s, fp);
 280                 }
 281         }
 282 }
 283
 284 /* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\n', '\r' */
 285 void
 286 xmlencodeline(FILE *fp, const char *s, size_t len)
 287 {
 288         size_t i;
 289         for (i = 0; *s && i < len; s++, i++) {
 290                 switch(*s) {
 291                 case '<':  fputs("&lt;",   fp); break;
 292                 case '>':  fputs("&gt;",   fp); break;
 293                 case '\'': fputs("&#39;",  fp); break;
 294                 case '&':  fputs("&amp;",  fp); break;
 295                 case '"':  fputs("&quot;", fp); break;
 296                 case '\r': break; /* ignore CR */
 297                 case '\n': break; /* ignore LF */
 298                 default:   putc(*s, fp);
 299                 }
 300         }
 301 }
 302
 303 int
 304 mkdirp(const char *path)
 305 {
 306         char tmp[PATH_MAX], *p;
 307
 308         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 309                 errx(1, "path truncated: '%s'", path);
 310         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 311                 if (*p != '/')
 312                         continue;
 313                 *p = '\0';
 314                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 315                         return -1;
 316                 *p = '/';
 317         }
 318         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 319                 return -1;
 320         return 0;
 321 }
 322
 323 void
 324 printtimez(FILE *fp, const git_time *intime)
 325 {
 326         struct tm *intm;
 327         time_t t;
 328         char out[32];
 329
 330         t = (time_t)intime->time;
 331         if (!(intm = gmtime(&t)))
 332                 return;
 333         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 334         fputs(out, fp);
 335 }
 336
 337 void
 338 printtime(FILE *fp, const git_time *intime)
 339 {
 340         struct tm *intm;
 341         time_t t;
 342         char out[32];
 343
 344         t = (time_t)intime->time + (intime->offset * 60);
 345         if (!(intm = gmtime(&t)))
 346                 return;
 347         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 348         if (intime->offset < 0)
 349                 fprintf(fp, "%s -%02d%02d", out,
 350                             -(intime->offset) / 60, -(intime->offset) % 60);
 351         else
 352                 fprintf(fp, "%s +%02d%02d", out,
 353                             intime->offset / 60, intime->offset % 60);
 354 }
 355
 356 void
 357 printtimeshort(FILE *fp, const git_time *intime)
 358 {
 359         struct tm *intm;
 360         time_t t;
 361         char out[32];
 362
 363         t = (time_t)intime->time;
 364         if (!(intm = gmtime(&t)))
 365                 return;
 366         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 367         fputs(out, fp);
 368 }
 369
 370 void
 371 writeheader(FILE *fp, const char *title)
 372 {
 373         fputs("<!DOCTYPE html>\n"
 374                 "<html lang=\"en\">\n<head>\n"
 375                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 376                 "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n"
 377                 "<title>", fp);
 378         xmlencode(fp, title, strlen(title));
 379         if (title[0] && strippedname[0])
 380                 fputs(" - ", fp);
 381         xmlencode(fp, strippedname, strlen(strippedname));
 382         if (description[0])
 383                 fputs(" - ", fp);
 384         xmlencode(fp, description, strlen(description));
 385         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 386         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 387                 name, relpath);
 388         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 389         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%ssyntax.css\" />\n", relpath);
 390         fputs("</head>\n<body>\n", fp);
 391         fprintf(fp, "<a href=\"../%s\"><img class=\"logo\" src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 392                 relpath, relpath);
 393         fputs("<h1>", fp);
 394         xmlencode(fp, strippedname, strlen(strippedname));
 395         fputs("</h1><p class=\"desc\">", fp);
 396         xmlencode(fp, description, strlen(description));
 397         fputs("</p>", fp);
 398         if (cloneurl[0]) {
 399                 fputs("<p class=\"clone\">git clone <a href=\"", fp);
 400                 xmlencode(fp, cloneurl, strlen(cloneurl));
 401                 fputs("\">", fp);
 402                 xmlencode(fp, cloneurl, strlen(cloneurl));
 403                 fputs("</a></p>", fp);
 404         }
 405         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 406         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 407         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 408         if (submodules)
 409                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 410                         relpath, submodules);
 411         if (readme)
 412                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 413                         relpath, readme);
 414         if (license)
 415                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 416                         relpath, license);
 417         fprintf(fp, " | <a href=\"%s%s.tar.gz\">Download</a>",
 418                                         relpath, strippedname);
 419         fputs("<hr/>\n<div id=\"content\">\n", fp);
 420 }
 421
 422 void
 423 writefooter(FILE *fp)
 424 {
 425         fputs("</div>\n</body>\n</html>\n", fp);
 426 }
 427
 428 const char *
 429 get_ext(const char *filename)
 430 {
 431         const char *dot = strrchr(filename, '.');
 432         if(!dot || dot == filename) return "";
 433         return dot + 1;
 434 }
 435
 436 void
 437 call_chroma(const char *filename, FILE *fp, const char *s, size_t len)
 438 {
 439         htmlized = false;
 440         char *html = "";
 441         // Flush HTML-file
 442         fflush(fp);
 443
 444 #ifdef HAS_CMARK
 445         html = cmark_markdown_to_html(s, len, CMARK_OPT_DEFAULT);
 446         if (strcmp(get_ext(filename), "md") == 0) htmlized = true;
 447 #endif
 448
 449 #ifdef HAS_CHROMA
 450         if (!htmlized) {
 451                 // Copy STDOUT
 452                 int stdout_copy = dup(1);
 453
 454                 // Redirect STDOUT
 455                 dup2(fileno(fp), 1);
 456
 457                 char cmd[255] = "chroma --html --html-only --html-lines --html-lines-table --filename ";
 458                 strncat(cmd, filename, strlen(filename) + 1);
 459                 FILE *child = popen(cmd, "w");
 460                 if (child == NULL) {
 461                         printf("child is null: %s", strerror(errno));
 462                         exit(1);
 463                 }
 464
 465                 // Give code to highlight through STDIN:
 466                 size_t i;
 467                 for (i = 0; *s && i < len; s++, i++) {
 468                         fprintf(child, "%c", *s);
 469                 }
 470
 471                 pclose(child);
 472                 fflush(stdout);
 473
 474                 // Give back STDOUT.
 475                 dup2(stdout_copy, 1);
 476
 477         } else {
 478                 fprintf(fp, "%s", html);
 479         }
 480 #else
 481                 fprintf(fp, "<pre>%s</pre>", s);
 482 #endif
 483                 free(html);
 484 }
 485
 486 void
 487 writeblobhtml(const char *filename, FILE *fp, const git_blob *blob)
 488 {
 489         const char *s = git_blob_rawcontent(blob);
 490         git_off_t len = git_blob_rawsize(blob);
 491
 492         if (len > 0) {
 493                 call_chroma(filename, fp, s, len);
 494         }
 495 }
 496
 497 void
 498 printcommit(FILE *fp, struct commitinfo *ci)
 499 {
 500         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 501                         relpath, ci->oid, ci->oid);
 502
 503         if (ci->parentoid[0])
 504                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 505                                 relpath, ci->parentoid, ci->parentoid);
 506
 507         if (ci->author) {
 508                 fputs("<b>Author:</b> ", fp);
 509                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 510                 fputs(" &lt;<a href=\"mailto:", fp);
 511                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 512                 fputs("\">", fp);
 513                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 514                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 515                 printtime(fp, &(ci->author->when));
 516                 putc('\n', fp);
 517         }
 518         if (ci->msg) {
 519                 putc('\n', fp);
 520                 xmlencode(fp, ci->msg, strlen(ci->msg));
 521                 putc('\n', fp);
 522         }
 523 }
 524
 525 void
 526 printshowfile(FILE *fp, struct commitinfo *ci)
 527 {
 528         const git_diff_delta *delta;
 529         const git_diff_hunk *hunk;
 530         const git_diff_line *line;
 531         git_patch *patch;
 532         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 533         char linestr[80];
 534         int c;
 535
 536         printcommit(fp, ci);
 537
 538         if (!ci->deltas)
 539                 return;
 540
 541         if (ci->filecount > 1000   ||
 542             ci->ndeltas   > 1000   ||
 543             ci->addcount  > 100000 ||
 544             ci->delcount  > 100000) {
 545                 fputs("Diff is too large, output suppressed.\n", fp);
 546                 return;
 547         }
 548
 549         /* diff stat */
 550         fputs("<b>Diffstat:</b>\n<table>", fp);
 551         for (i = 0; i < ci->ndeltas; i++) {
 552                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 553
 554                 switch (delta->status) {
 555                 case GIT_DELTA_ADDED:      c = 'A'; break;
 556                 case GIT_DELTA_COPIED:     c = 'C'; break;
 557                 case GIT_DELTA_DELETED:    c = 'D'; break;
 558                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 559                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 560                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 561                 default:                   c = ' '; break;
 562                 }
 563                 if (c == ' ')
 564                         fprintf(fp, "<tr><td>%c", c);
 565                 else
 566                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 567
 568                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 569                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 570                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 571                         fputs(" -&gt; ", fp);
 572                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 573                 }
 574
 575                 add = ci->deltas[i]->addcount;
 576                 del = ci->deltas[i]->delcount;
 577                 changed = add + del;
 578                 total = sizeof(linestr) - 2;
 579                 if (changed > total) {
 580                         if (add)
 581                                 add = ((float)total / changed * add) + 1;
 582                         if (del)
 583                                 del = ((float)total / changed * del) + 1;
 584                 }
 585                 memset(&linestr, '+', add);
 586                 memset(&linestr[add], '-', del);
 587
 588                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 589                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 590                 fwrite(&linestr, 1, add, fp);
 591                 fputs("</span><span class=\"d\">", fp);
 592                 fwrite(&linestr[add], 1, del, fp);
 593                 fputs("</span></td></tr>\n", fp);
 594         }
 595         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 596                 ci->filecount, ci->filecount == 1 ? "" : "s",
 597                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 598                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 599
 600         fputs("<hr/>", fp);
 601
 602         for (i = 0; i < ci->ndeltas; i++) {
 603                 patch = ci->deltas[i]->patch;
 604                 delta = git_patch_get_delta(patch);
 605                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 606                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 607                 fputs(".html\">", fp);
 608                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 609                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 610                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 611                 fprintf(fp, ".html\">");
 612                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 613                 fprintf(fp, "</a></b>\n");
 614
 615                 /* check binary data */
 616                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 617                         fputs("Binary files differ.\n", fp);
 618                         continue;
 619                 }
 620
 621                 nhunks = git_patch_num_hunks(patch);
 622                 for (j = 0; j < nhunks; j++) {
 623                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 624                                 break;
 625
 626                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 627                         xmlencode(fp, hunk->header, hunk->header_len);
 628                         fputs("</a>", fp);
 629
 630                         for (k = 0; ; k++) {
 631                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 632                                         break;
 633                                 if (line->old_lineno == -1)
 634                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 635                                                 i, j, k, i, j, k);
 636                                 else if (line->new_lineno == -1)
 637                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 638                                                 i, j, k, i, j, k);
 639                                 else
 640                                         putc(' ', fp);
 641                                 xmlencodeline(fp, line->content, line->content_len);
 642                                 putc('\n', fp);
 643                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 644                                         fputs("</a>", fp);
 645                         }
 646                 }
 647         }
 648 }
 649
 650 void
 651 writelogline(FILE *fp, struct commitinfo *ci)
 652 {
 653         fputs("<tr><td>", fp);
 654         if (ci->author)
 655                 printtimeshort(fp, &(ci->author->when));
 656         fputs("</td><td>", fp);
 657         if (ci->summary) {
 658                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 659                 xmlencode(fp, ci->summary, strlen(ci->summary));
 660                 fputs("</a>", fp);
 661         }
 662         fputs("</td><td>", fp);
 663         if (ci->author)
 664                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 665         fputs("</td><td class=\"num\" align=\"right\">", fp);
 666         fprintf(fp, "%zu", ci->filecount);
 667         fputs("</td><td class=\"num\" align=\"right\">", fp);
 668         fprintf(fp, "+%zu", ci->addcount);
 669         fputs("</td><td class=\"num\" align=\"right\">", fp);
 670         fprintf(fp, "-%zu", ci->delcount);
 671         fputs("</td></tr>\n", fp);
 672 }
 673
 674 int
 675 writelog(FILE *fp, const git_oid *oid)
 676 {
 677         struct commitinfo *ci;
 678         git_revwalk *w = NULL;
 679         git_oid id;
 680         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 681         FILE *fpfile;
 682         int r;
 683
 684         git_revwalk_new(&w, repo);
 685         git_revwalk_push(w, oid);
 686         git_revwalk_simplify_first_parent(w);
 687
 688         while (!git_revwalk_next(&id, w)) {
 689                 relpath = "";
 690
 691                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 692                         break;
 693
 694                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 695                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 696                 if (r < 0 || (size_t)r >= sizeof(path))
 697                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 698                 r = access(path, F_OK);
 699
 700                 /* optimization: if there are no log lines to write and
 701                    the commit file already exists: skip the diffstat */
 702                 if (!nlogcommits && !r)
 703                         continue;
 704
 705                 if (!(ci = commitinfo_getbyoid(&id)))
 706                         break;
 707                 /* diffstat: for stagit HTML required for the log.html line */
 708                 if (commitinfo_getstats(ci) == -1)
 709                         goto err;
 710
 711                 if (nlogcommits < 0) {
 712                         writelogline(fp, ci);
 713                 } else if (nlogcommits > 0) {
 714                         writelogline(fp, ci);
 715                         nlogcommits--;
 716                         if (!nlogcommits && ci->parentoid[0])
 717                                 fputs("<tr><td></td><td colspan=\"5\">"
 718                                       "More commits remaining [...]</td>"
 719                                       "</tr>\n", fp);
 720                 }
 721
 722                 if (cachefile)
 723                         writelogline(wcachefp, ci);
 724
 725                 /* check if file exists if so skip it */
 726                 if (r) {
 727                         relpath = "../";
 728                         fpfile = efopen(path, "w");
 729                         writeheader(fpfile, ci->summary);
 730                         fputs("<pre>", fpfile);
 731                         printshowfile(fpfile, ci);
 732                         fputs("</pre>\n", fpfile);
 733                         writefooter(fpfile);
 734                         fclose(fpfile);
 735                 }
 736 err:
 737                 commitinfo_free(ci);
 738         }
 739         git_revwalk_free(w);
 740
 741         relpath = "";
 742
 743         return 0;
 744 }
 745
 746 void
 747 printcommitatom(FILE *fp, struct commitinfo *ci)
 748 {
 749         fputs("<entry>\n", fp);
 750
 751         fprintf(fp, "<id>%s</id>\n", ci->oid);
 752         if (ci->author) {
 753                 fputs("<published>", fp);
 754                 printtimez(fp, &(ci->author->when));
 755                 fputs("</published>\n", fp);
 756         }
 757         if (ci->committer) {
 758                 fputs("<updated>", fp);
 759                 printtimez(fp, &(ci->committer->when));
 760                 fputs("</updated>\n", fp);
 761         }
 762         if (ci->summary) {
 763                 fputs("<title type=\"text\">", fp);
 764                 xmlencode(fp, ci->summary, strlen(ci->summary));
 765                 fputs("</title>\n", fp);
 766         }
 767         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"%scommit/%s.html\" />\n",
 768                 baseurl, ci->oid);
 769
 770         if (ci->author) {
 771                 fputs("<author>\n<name>", fp);
 772                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 773                 fputs("</name>\n<email>", fp);
 774                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 775                 fputs("</email>\n</author>\n", fp);
 776         }
 777
 778         fputs("<content type=\"text\">", fp);
 779         fprintf(fp, "commit %s\n", ci->oid);
 780         if (ci->parentoid[0])
 781                 fprintf(fp, "parent %s\n", ci->parentoid);
 782         if (ci->author) {
 783                 fputs("Author: ", fp);
 784                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 785                 fputs(" &lt;", fp);
 786                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 787                 fputs("&gt;\nDate:   ", fp);
 788                 printtime(fp, &(ci->author->when));
 789                 putc('\n', fp);
 790         }
 791         if (ci->msg) {
 792                 putc('\n', fp);
 793                 xmlencode(fp, ci->msg, strlen(ci->msg));
 794         }
 795         fputs("\n</content>\n</entry>\n", fp);
 796 }
 797
 798 int
 799 writeatom(FILE *fp)
 800 {
 801         struct commitinfo *ci;
 802         git_revwalk *w = NULL;
 803         git_oid id;
 804         size_t i, m = 100; /* last 'm' commits */
 805
 806         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 807               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 808         xmlencode(fp, strippedname, strlen(strippedname));
 809         fputs(", branch HEAD</title>\n<subtitle>", fp);
 810         xmlencode(fp, description, strlen(description));
 811         fputs("</subtitle>\n", fp);
 812
 813         git_revwalk_new(&w, repo);
 814         git_revwalk_push_head(w);
 815         git_revwalk_simplify_first_parent(w);
 816
 817         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 818                 if (!(ci = commitinfo_getbyoid(&id)))
 819                         break;
 820                 printcommitatom(fp, ci);
 821                 commitinfo_free(ci);
 822         }
 823         git_revwalk_free(w);
 824
 825         fputs("</feed>\n", fp);
 826
 827         return 0;
 828 }
 829
 830 float
 831 rounder(float var)
 832 {
 833     int value = var * 10 + .5;
 834     return value / 10.0;
 835 }
 836
 837 const char *
 838 convertbytes(int bytes)
 839 {
 840         bytes = (float)bytes;
 841         static char outp[25];
 842         if (bytes < 1024) sprintf(outp, "%u %s", bytes, "B");
 843         else if (bytes < 1048576) sprintf(outp, "%0.1f %s", rounder(bytes/1024.0), "K");
 844         else sprintf(outp, "%0.1f %s", rounder(bytes/1048576.0), "M");
 845         return outp;
 846 }
 847
 848 void
 849 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 850 {
 851         char tmp[PATH_MAX] = "", *d;
 852         const char *p;
 853         FILE *fp;
 854
 855         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 856                 errx(1, "path truncated: '%s'", fpath);
 857         if (!(d = dirname(tmp)))
 858                 err(1, "dirname");
 859         mkdirp(d);
 860
 861         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 862                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 863                         errx(1, "path truncated: '../%s'", tmp);
 864         }
 865         relpath = tmp;
 866
 867         fp = efopen(fpath, "w");
 868         writeheader(fp, filename);
 869         fputs("<p> ", fp);
 870         xmlencode(fp, filename, strlen(filename));
 871         fprintf(fp, " (%s)", convertbytes((int)filesize));
 872
 873 #ifdef HAS_CMARK
 874         char newfpath[PATH_MAX];
 875         char newfilename[PATH_MAX];
 876         if (strcmp(get_ext(filename), "md") == 0) {
 877                 fprintf(fp, " <a href=\"%s.html-raw\">View raw</a>", filename);
 878                 strcpy(newfpath, fpath);
 879                 strcat(newfpath, "-raw");
 880
 881                 strcpy(newfilename, filename);
 882                 strcat(newfilename, "-raw");
 883                 strcpy(oldfilename, filename);
 884
 885                 /* NOTE: recurses */
 886                 writeblob(obj, newfpath, newfilename, filesize);
 887         } else if (strcmp(get_ext(filename), "md-raw" ) == 0) {
 888                 fprintf(fp, " <a href=\"%s.html\">View rendered</a>", oldfilename);
 889         }
 890 #endif
 891
 892         fputs(".</p><hr/>", fp);
 893
 894         if (git_blob_is_binary((git_blob *)obj)) {
 895                 fputs("<p>Binary file.</p>\n", fp);
 896         } else {
 897                 writeblobhtml(filename, fp, (git_blob *)obj);
 898                 if (ferror(fp))
 899                         err(1, "fwrite");
 900         }
 901
 902         writefooter(fp);
 903         fclose(fp);
 904
 905         relpath = "";
 906 }
 907
 908 const char *
 909 filemode(git_filemode_t m)
 910 {
 911         static char mode[11];
 912
 913         memset(mode, '-', sizeof(mode) - 1);
 914         mode[10] = '\0';
 915
 916         if (S_ISREG(m))
 917                 mode[0] = '-';
 918         else if (S_ISBLK(m))
 919                 mode[0] = 'b';
 920         else if (S_ISCHR(m))
 921                 mode[0] = 'c';
 922         else if (S_ISDIR(m))
 923                 mode[0] = 'd';
 924         else if (S_ISFIFO(m))
 925                 mode[0] = 'p';
 926         else if (S_ISLNK(m))
 927                 mode[0] = 'l';
 928         else if (S_ISSOCK(m))
 929                 mode[0] = 's';
 930         else
 931                 mode[0] = '?';
 932
 933         if (m & S_IRUSR) mode[1] = 'r';
 934         if (m & S_IWUSR) mode[2] = 'w';
 935         if (m & S_IXUSR) mode[3] = 'x';
 936         if (m & S_IRGRP) mode[4] = 'r';
 937         if (m & S_IWGRP) mode[5] = 'w';
 938         if (m & S_IXGRP) mode[6] = 'x';
 939         if (m & S_IROTH) mode[7] = 'r';
 940         if (m & S_IWOTH) mode[8] = 'w';
 941         if (m & S_IXOTH) mode[9] = 'x';
 942
 943         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 944         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 945         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 946
 947         return mode;
 948 }
 949
 950 int
 951 writefilestree(FILE *fp, git_tree *tree, const char *path)
 952 {
 953         const git_tree_entry *entry = NULL;
 954         git_submodule *module = NULL;
 955         git_object *obj = NULL;
 956         git_off_t filesize;
 957         const char *entryname;
 958         char filepath[PATH_MAX], entrypath[PATH_MAX];
 959         size_t count, i;
 960         int r, ret;
 961
 962         count = git_tree_entrycount(tree);
 963         for (i = 0; i < count; i++) {
 964                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 965                     !(entryname = git_tree_entry_name(entry)))
 966                         return -1;
 967                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 968
 969                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 970                          entrypath);
 971                 if (r < 0 || (size_t)r >= sizeof(filepath))
 972                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 973
 974                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 975                         switch (git_object_type(obj)) {
 976                         case GIT_OBJ_BLOB:
 977                                 break;
 978                         case GIT_OBJ_TREE:
 979                                 /* NOTE: recurses */
 980                                 ret = writefilestree(fp, (git_tree *)obj,
 981                                                      entrypath);
 982                                 git_object_free(obj);
 983                                 if (ret)
 984                                         return ret;
 985                                 continue;
 986                         default:
 987                                 git_object_free(obj);
 988                                 continue;
 989                         }
 990
 991                         filesize = git_blob_rawsize((git_blob *)obj);
 992                         writeblob(obj, filepath, entryname, filesize);
 993
 994                         fputs("<tr><td>", fp);
 995                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 996                         fprintf(fp, "</td><td><a href=\"%s", relpath);
 997                         xmlencode(fp, filepath, strlen(filepath));
 998                         fputs("\">", fp);
 999                         xmlencode(fp, entrypath, strlen(entrypath));
1000                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
1001                         fprintf(fp, "%s", convertbytes((int)filesize));
1002                         fputs("</td></tr>\n", fp);
1003                         git_object_free(obj);
1004                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
1005                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
1006                                 relpath);
1007                         xmlencode(fp, entrypath, strlen(entrypath));
1008                         git_submodule_free(module);
1009                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
1010                 }
1011         }
1012
1013         return 0;
1014 }
1015
1016 int
1017 writefiles(FILE *fp, const git_oid *id)
1018 {
1019         git_tree *tree = NULL;
1020         git_commit *commit = NULL;
1021         int ret = -1;
1022
1023         fputs("<table id=\"files\"><thead>\n<tr>"
1024               "<td><b>Mode</b></td><td><b>Name</b></td>"
1025               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
1026               "</tr>\n</thead><tbody>\n", fp);
1027
1028         if (!git_commit_lookup(&commit, repo, id) &&
1029             !git_commit_tree(&tree, commit))
1030                 ret = writefilestree(fp, tree, "");
1031
1032         fputs("</tbody></table>", fp);
1033
1034         git_commit_free(commit);
1035         git_tree_free(tree);
1036
1037         return ret;
1038 }
1039
1040 int
1041 refs_cmp(const void *v1, const void *v2)
1042 {
1043         git_reference *r1 = (*(git_reference **)v1);
1044         git_reference *r2 = (*(git_reference **)v2);
1045         int r;
1046
1047         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
1048                 return r;
1049
1050         return strcmp(git_reference_shorthand(r1),
1051                       git_reference_shorthand(r2));
1052 }
1053
1054 int
1055 writerefs(FILE *fp)
1056 {
1057         struct commitinfo *ci;
1058         const git_oid *id = NULL;
1059         git_object *obj = NULL;
1060         git_reference *dref = NULL, *r, *ref = NULL;
1061         git_reference_iterator *it = NULL;
1062         git_reference **refs = NULL;
1063         size_t count, i, j, refcount;
1064         const char *titles[] = { "Branches", "Tags" };
1065         const char *ids[] = { "branches", "tags" };
1066         const char *name;
1067
1068         if (git_reference_iterator_new(&it, repo))
1069                 return -1;
1070
1071         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
1072                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
1073                         err(1, "realloc");
1074                 refs[refcount] = ref;
1075         }
1076         git_reference_iterator_free(it);
1077
1078         /* sort by type then shorthand name */
1079         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
1080
1081         for (j = 0; j < 2; j++) {
1082                 for (i = 0, count = 0; i < refcount; i++) {
1083                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
1084                             !(git_reference_is_tag(refs[i]) && j == 1))
1085                                 continue;
1086
1087                         switch (git_reference_type(refs[i])) {
1088                         case GIT_REF_SYMBOLIC:
1089                                 if (git_reference_resolve(&dref, refs[i]))
1090                                         goto err;
1091                                 r = dref;
1092                                 break;
1093                         case GIT_REF_OID:
1094                                 r = refs[i];
1095                                 break;
1096                         default:
1097                                 continue;
1098                         }
1099                         if (!git_reference_target(r) ||
1100                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1101                                 goto err;
1102                         if (!(id = git_object_id(obj)))
1103                                 goto err;
1104                         if (!(ci = commitinfo_getbyoid(id)))
1105                                 break;
1106
1107                         /* print header if it has an entry (first). */
1108                         if (++count == 1) {
1109                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1110                                         "<thead>\n<tr><td><b>Name</b></td>"
1111                                         "<td><b>Last commit date</b></td>"
1112                                         "<td><b>Author</b></td>\n</tr>\n"
1113                                         "</thead><tbody>\n",
1114                                          titles[j], ids[j]);
1115                         }
1116
1117                         relpath = "";
1118                         name = git_reference_shorthand(r);
1119
1120                         fputs("<tr><td>", fp);
1121                         xmlencode(fp, name, strlen(name));
1122                         fputs("</td><td>", fp);
1123                         if (ci->author)
1124                                 printtimeshort(fp, &(ci->author->when));
1125                         fputs("</td><td>", fp);
1126                         if (ci->author)
1127                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1128                         fputs("</td></tr>\n", fp);
1129
1130                         relpath = "../";
1131
1132                         commitinfo_free(ci);
1133                         git_object_free(obj);
1134                         obj = NULL;
1135                         git_reference_free(dref);
1136                         dref = NULL;
1137                 }
1138                 /* table footer */
1139                 if (count)
1140                         fputs("</tbody></table><br/>", fp);
1141         }
1142
1143 err:
1144         git_object_free(obj);
1145         git_reference_free(dref);
1146
1147         for (i = 0; i < refcount; i++)
1148                 git_reference_free(refs[i]);
1149         free(refs);
1150
1151         return 0;
1152 }
1153
1154 void
1155 usage(char *argv0)
1156 {
1157         fprintf(stderr, "%s [-c cachefile | -l commits] "
1158                 "[-u baseurl] repodir\n", argv0);
1159         exit(1);
1160 }
1161
1162 int
1163 main(int argc, char *argv[])
1164 {
1165         git_object *obj = NULL;
1166         const git_oid *head = NULL;
1167         mode_t mask;
1168         FILE *fp, *fpread;
1169         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1170         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1171         size_t n;
1172         int i, fd;
1173
1174         for (i = 1; i < argc; i++) {
1175                 if (argv[i][0] != '-') {
1176                         if (repodir)
1177                                 usage(argv[0]);
1178                         repodir = argv[i];
1179                 } else if (argv[i][1] == 'c') {
1180                         if (nlogcommits > 0 || i + 1 >= argc)
1181                                 usage(argv[0]);
1182                         cachefile = argv[++i];
1183                 } else if (argv[i][1] == 'l') {
1184                         if (cachefile || i + 1 >= argc)
1185                                 usage(argv[0]);
1186                         errno = 0;
1187                         nlogcommits = strtoll(argv[++i], &p, 10);
1188                         if (argv[i][0] == '\0' || *p != '\0' ||
1189                             nlogcommits <= 0 || errno)
1190                                 usage(argv[0]);
1191                 } else if (argv[i][1] == 'u') {
1192                         if (i + 1 >= argc)
1193                                 usage(argv[0]);
1194                         baseurl = argv[++i];
1195                 }
1196         }
1197         if (!repodir)
1198                 usage(argv[0]);
1199
1200         if (!realpath(repodir, repodirabs))
1201                 err(1, "realpath");
1202
1203         git_libgit2_init();
1204
1205 #ifdef __OpenBSD__
1206         if (unveil(repodir, "r") == -1)
1207                 err(1, "unveil: %s", repodir);
1208         if (unveil(".", "rwc") == -1)
1209                 err(1, "unveil: .");
1210         if (cachefile && unveil(cachefile, "rwc") == -1)
1211                 err(1, "unveil: %s", cachefile);
1212
1213         if (cachefile) {
1214                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1215                         err(1, "pledge");
1216         } else {
1217                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1218                         err(1, "pledge");
1219         }
1220 #endif
1221
1222         if (git_repository_open_ext(&repo, repodir,
1223                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1224                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1225                 return 1;
1226         }
1227
1228         /* find HEAD */
1229         if (!git_revparse_single(&obj, repo, "HEAD"))
1230                 head = git_object_id(obj);
1231         git_object_free(obj);
1232
1233         /* use directory name as name */
1234         if ((name = strrchr(repodirabs, '/')))
1235                 name++;
1236         else
1237                 name = "";
1238
1239         /* copy css */
1240         char cwd[PATH_MAX];
1241         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1242         cp("/usr/local/share/stagit/syntax.css", strcat(cwd, "/syntax.css"));
1243         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1244         cp("/usr/local/share/stagit/style.css", strcat(cwd, "/style.css"));
1245
1246         /* strip .git suffix */
1247         if (!(strippedname = strdup(name)))
1248                 err(1, "strdup");
1249         if ((p = strrchr(strippedname, '.')))
1250                 if (!strcmp(p, ".git"))
1251                         *p = '\0';
1252
1253         /* read description or .git/description */
1254         joinpath(path, sizeof(path), repodir, "description");
1255         if (!(fpread = fopen(path, "r"))) {
1256                 joinpath(path, sizeof(path), repodir, ".git/description");
1257                 fpread = fopen(path, "r");
1258         }
1259         if (fpread) {
1260                 if (!fgets(description, sizeof(description), fpread))
1261                         description[0] = '\0';
1262                 fclose(fpread);
1263         }
1264
1265         /* read url or .git/url */
1266         joinpath(path, sizeof(path), repodir, "url");
1267         if (!(fpread = fopen(path, "r"))) {
1268                 joinpath(path, sizeof(path), repodir, ".git/url");
1269                 fpread = fopen(path, "r");
1270         }
1271         if (fpread) {
1272                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1273                         cloneurl[0] = '\0';
1274                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1275                 fclose(fpread);
1276         }
1277
1278         /* check LICENSE */
1279         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1280                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1281                     git_object_type(obj) == GIT_OBJ_BLOB)
1282                         license = licensefiles[i] + strlen("HEAD:");
1283                 git_object_free(obj);
1284         }
1285
1286         /* check README */
1287         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1288                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1289                     git_object_type(obj) == GIT_OBJ_BLOB)
1290                         readme = readmefiles[i] + strlen("HEAD:");
1291                 git_object_free(obj);
1292         }
1293
1294         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1295             git_object_type(obj) == GIT_OBJ_BLOB)
1296                 submodules = ".gitmodules";
1297         git_object_free(obj);
1298
1299         /* Generate tarball */
1300         char tarball[255];
1301         sprintf(tarball, "tar -zcf %s.tar.gz --ignore-failed-read --exclude='.git' %s",
1302                             strippedname, repodir);
1303         system(tarball);
1304
1305         /* log for HEAD */
1306         fp = efopen("log.html", "w");
1307         relpath = "";
1308         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1309         writeheader(fp, "Log");
1310         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1311               "<td><b>Commit</b></td>"
1312               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1313               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1314               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1315
1316         if (cachefile && head) {
1317                 /* read from cache file (does not need to exist) */
1318                 if ((rcachefp = fopen(cachefile, "r"))) {
1319                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1320                                 errx(1, "%s: no object id", cachefile);
1321                         if (git_oid_fromstr(&lastoid, lastoidstr))
1322                                 errx(1, "%s: invalid object id", cachefile);
1323                 }
1324
1325                 /* write log to (temporary) cache */
1326                 if ((fd = mkstemp(tmppath)) == -1)
1327                         err(1, "mkstemp");
1328                 if (!(wcachefp = fdopen(fd, "w")))
1329                         err(1, "fdopen: '%s'", tmppath);
1330                 /* write last commit id (HEAD) */
1331                 git_oid_tostr(buf, sizeof(buf), head);
1332                 fprintf(wcachefp, "%s\n", buf);
1333
1334                 writelog(fp, head);
1335
1336                 if (rcachefp) {
1337                         /* append previous log to log.html and the new cache */
1338                         while (!feof(rcachefp)) {
1339                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1340                                 if (ferror(rcachefp))
1341                                         err(1, "fread");
1342                                 if (fwrite(buf, 1, n, fp) != n ||
1343                                     fwrite(buf, 1, n, wcachefp) != n)
1344                                         err(1, "fwrite");
1345                         }
1346                         fclose(rcachefp);
1347                 }
1348                 fclose(wcachefp);
1349         } else {
1350                 if (head)
1351                         writelog(fp, head);
1352         }
1353
1354         fputs("</tbody></table>", fp);
1355         writefooter(fp);
1356         fclose(fp);
1357
1358         /* files for HEAD */
1359         fp = efopen("files.html", "w");
1360         writeheader(fp, "Files");
1361         if (head)
1362                 writefiles(fp, head);
1363         writefooter(fp);
1364         fclose(fp);
1365
1366         cp("files.html", "index.html");
1367
1368         /* summary page with branches and tags */
1369         fp = efopen("refs.html", "w");
1370         writeheader(fp, "Refs");
1371         writerefs(fp);
1372         writefooter(fp);
1373         fclose(fp);
1374
1375         /* Atom feed */
1376         fp = efopen("atom.xml", "w");
1377         writeatom(fp);
1378         fclose(fp);
1379
1380         /* rename new cache file on success */
1381         if (cachefile && head) {
1382                 if (rename(tmppath, cachefile))
1383                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1384                 umask((mask = umask(0)));
1385                 if (chmod(cachefile,
1386                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1387                         err(1, "chmod: '%s'", cachefile);
1388         }
1389
1390         /* cleanup */
1391         git_repository_free(repo);
1392         git_libgit2_shutdown();
1393         free(strippedname);
1394
1395         return 0;
1396 }