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