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 *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 static char oldfilename[PATH_MAX]; /* filename of the last file */
  75
  76 /* cache */
  77 static git_oid lastoid;
  78 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  79 static FILE *rcachefp, *wcachefp;
  80 static const char *cachefile;
  81
  82 void
  83 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  84 {
  85         int r;
  86
  87         r = snprintf(buf, bufsiz, "%s%s%s",
  88                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  89         if (r < 0 || (size_t)r >= bufsiz)
  90                 errx(1, "path truncated: '%s%s%s'",
  91                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  92 }
  93
  94 void
  95 deltainfo_free(struct deltainfo *di)
  96 {
  97         if (!di)
  98                 return;
  99         git_patch_free(di->patch);
 100         memset(di, 0, sizeof(*di));
 101         free(di);
 102 }
 103
 104 int
 105 commitinfo_getstats(struct commitinfo *ci)
 106 {
 107         struct deltainfo *di;
 108         git_diff_options opts;
 109         git_diff_find_options fopts;
 110         const git_diff_delta *delta;
 111         const git_diff_hunk *hunk;
 112         const git_diff_line *line;
 113         git_patch *patch = NULL;
 114         size_t ndeltas, nhunks, nhunklines;
 115         size_t i, j, k;
 116
 117         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 118                 goto err;
 119         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 120                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 121                         ci->parent = NULL;
 122                         ci->parent_tree = NULL;
 123                 }
 124         }
 125
 126         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 127         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 128                       GIT_DIFF_IGNORE_SUBMODULES |
 129                       GIT_DIFF_INCLUDE_TYPECHANGE;
 130         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 131                 goto err;
 132
 133         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 134                 goto err;
 135         /* find renames and copies, exact matches (no heuristic) for renames. */
 136         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
 137                        GIT_DIFF_FIND_EXACT_MATCH_ONLY;
 138         if (git_diff_find_similar(ci->diff, &fopts))
 139                 goto err;
 140
 141         ndeltas = git_diff_num_deltas(ci->diff);
 142         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 143                 err(1, "calloc");
 144
 145         for (i = 0; i < ndeltas; i++) {
 146                 if (git_patch_from_diff(&patch, ci->diff, i))
 147                         goto err;
 148
 149                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 150                         err(1, "calloc");
 151                 di->patch = patch;
 152                 ci->deltas[i] = di;
 153
 154                 delta = git_patch_get_delta(patch);
 155
 156                 /* skip stats for binary data */
 157                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 158                         continue;
 159
 160                 nhunks = git_patch_num_hunks(patch);
 161                 for (j = 0; j < nhunks; j++) {
 162                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 163                                 break;
 164                         for (k = 0; ; k++) {
 165                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 166                                         break;
 167                                 if (line->old_lineno == -1) {
 168                                         di->addcount++;
 169                                         ci->addcount++;
 170                                 } else if (line->new_lineno == -1) {
 171                                         di->delcount++;
 172                                         ci->delcount++;
 173                                 }
 174                         }
 175                 }
 176         }
 177         ci->ndeltas = i;
 178         ci->filecount = i;
 179
 180         return 0;
 181
 182 err:
 183         git_diff_free(ci->diff);
 184         ci->diff = NULL;
 185         git_tree_free(ci->commit_tree);
 186         ci->commit_tree = NULL;
 187         git_tree_free(ci->parent_tree);
 188         ci->parent_tree = NULL;
 189         git_commit_free(ci->parent);
 190         ci->parent = NULL;
 191
 192         if (ci->deltas)
 193                 for (i = 0; i < ci->ndeltas; i++)
 194                         deltainfo_free(ci->deltas[i]);
 195         free(ci->deltas);
 196         ci->deltas = NULL;
 197         ci->ndeltas = 0;
 198         ci->addcount = 0;
 199         ci->delcount = 0;
 200         ci->filecount = 0;
 201
 202         return -1;
 203 }
 204
 205 void
 206 commitinfo_free(struct commitinfo *ci)
 207 {
 208         size_t i;
 209
 210         if (!ci)
 211                 return;
 212         if (ci->deltas)
 213                 for (i = 0; i < ci->ndeltas; i++)
 214                         deltainfo_free(ci->deltas[i]);
 215
 216         free(ci->deltas);
 217         git_diff_free(ci->diff);
 218         git_tree_free(ci->commit_tree);
 219         git_tree_free(ci->parent_tree);
 220         git_commit_free(ci->commit);
 221         git_commit_free(ci->parent);
 222         memset(ci, 0, sizeof(*ci));
 223         free(ci);
 224 }
 225
 226 struct commitinfo *
 227 commitinfo_getbyoid(const git_oid *id)
 228 {
 229         struct commitinfo *ci;
 230
 231         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 232                 err(1, "calloc");
 233
 234         if (git_commit_lookup(&(ci->commit), repo, id))
 235                 goto err;
 236         ci->id = id;
 237
 238         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 239         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 240
 241         ci->author = git_commit_author(ci->commit);
 242         ci->committer = git_commit_committer(ci->commit);
 243         ci->summary = git_commit_summary(ci->commit);
 244         ci->msg = git_commit_message(ci->commit);
 245
 246         return ci;
 247
 248 err:
 249         commitinfo_free(ci);
 250
 251         return NULL;
 252 }
 253
 254 FILE *
 255 efopen(const char *name, const char *flags)
 256 {
 257         FILE *fp;
 258
 259         if (!(fp = fopen(name, flags)))
 260                 err(1, "fopen: '%s'", name);
 261
 262         return fp;
 263 }
 264
 265 /* Escape characters below as HTML 2.0 / XML 1.0. */
 266 void
 267 xmlencode(FILE *fp, const char *s, size_t len)
 268 {
 269         size_t i;
 270
 271         for (i = 0; *s && i < len; s++, i++) {
 272                 switch(*s) {
 273                 case '<':  fputs("&lt;",   fp); break;
 274                 case '>':  fputs("&gt;",   fp); break;
 275                 case '\'': fputs("&#39;",  fp); break;
 276                 case '&':  fputs("&amp;",  fp); break;
 277                 case '"':  fputs("&quot;", fp); break;
 278                 default:   fputc(*s, fp);
 279                 }
 280         }
 281 }
 282
 283 /* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\n', '\r' */
 284 void
 285 xmlencodeline(FILE *fp, const char *s, size_t len)
 286 {
 287         size_t i;
 288
 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 /* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\n', '\r' */
 304 void
 305 xmlencodeline(FILE *fp, const char *s, size_t len)
 306 {
 307         size_t i;
 308
 309         for (i = 0; *s && i < len; s++, i++) {
 310                 switch(*s) {
 311                 case '<':  fputs("&lt;",   fp); break;
 312                 case '>':  fputs("&gt;",   fp); break;
 313                 case '\'': fputs("&#39;",  fp); break;
 314                 case '&':  fputs("&amp;",  fp); break;
 315                 case '"':  fputs("&quot;", fp); break;
 316                 case '\r': break; /* ignore CR */
 317                 case '\n': break; /* ignore LF */
 318                 default:   putc(*s, fp);
 319                 }
 320         }
 321 }
 322
 323 int
 324 mkdirp(const char *path)
 325 {
 326         char tmp[PATH_MAX], *p;
 327
 328         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 329                 errx(1, "path truncated: '%s'", path);
 330         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 331                 if (*p != '/')
 332                         continue;
 333                 *p = '\0';
 334                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 335                         return -1;
 336                 *p = '/';
 337         }
 338         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 339                 return -1;
 340         return 0;
 341 }
 342
 343 void
 344 printtimez(FILE *fp, const git_time *intime)
 345 {
 346         struct tm *intm;
 347         time_t t;
 348         char out[32];
 349
 350         t = (time_t)intime->time;
 351         if (!(intm = gmtime(&t)))
 352                 return;
 353         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 354         fputs(out, fp);
 355 }
 356
 357 void
 358 printtime(FILE *fp, const git_time *intime)
 359 {
 360         struct tm *intm;
 361         time_t t;
 362         char out[32];
 363
 364         t = (time_t)intime->time + (intime->offset * 60);
 365         if (!(intm = gmtime(&t)))
 366                 return;
 367         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 368         if (intime->offset < 0)
 369                 fprintf(fp, "%s -%02d%02d", out,
 370                             -(intime->offset) / 60, -(intime->offset) % 60);
 371         else
 372                 fprintf(fp, "%s +%02d%02d", out,
 373                             intime->offset / 60, intime->offset % 60);
 374 }
 375
 376 void
 377 printtimeshort(FILE *fp, const git_time *intime)
 378 {
 379         struct tm *intm;
 380         time_t t;
 381         char out[32];
 382
 383         t = (time_t)intime->time;
 384         if (!(intm = gmtime(&t)))
 385                 return;
 386         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 387         fputs(out, fp);
 388 }
 389
 390 void
 391 writeheader(FILE *fp, const char *title)
 392 {
 393         fputs("<!DOCTYPE html>\n"
 394                 "<html lang=\"en\">\n<head>\n"
 395                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 396                 "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n"
 397                 "<title>", fp);
 398         xmlencode(fp, title, strlen(title));
 399         if (title[0] && strippedname[0])
 400                 fputs(" - ", fp);
 401         xmlencode(fp, strippedname, strlen(strippedname));
 402         if (description[0])
 403                 fputs(" - ", fp);
 404         xmlencode(fp, description, strlen(description));
 405         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 406         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 407                 name, relpath);
 408         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 409         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%ssyntax.css\" />\n", relpath);
 410         fputs("</head>\n<body>\n<table><tr><td>", fp);
 411         fprintf(fp, "<a href=\"../%s\"><img alt=\"Home\" src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 412                 relpath, relpath);
 413         fputs("</td><td><h1>", fp);
 414         xmlencode(fp, strippedname, strlen(strippedname));
 415         fputs("</h1></td></tr><tr><td></td><td><span class=\"desc\">", fp);
 416         xmlencode(fp, description, strlen(description));
 417         fputs("</span></td></tr>", fp);
 418         if (cloneurl[0]) {
 419                 fputs("<tr class=\"url\"><td></td><td><span class=\"clone\">git clone <a href=\"", fp);
 420                 xmlencode(fp, cloneurl, strlen(cloneurl));
 421                 fputs("\">", fp);
 422                 xmlencode(fp, cloneurl, strlen(cloneurl));
 423                 fputs("</a></span></td></tr>", fp);
 424         }
 425         fputs("<tr><td></td><td>\n", fp);
 426         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 427         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 428         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 429         if (submodules)
 430                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 431                         relpath, submodules);
 432         if (readme)
 433                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 434                         relpath, readme);
 435         if (license)
 436                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 437                         relpath, license);
 438         fprintf(fp, " | <a href=\"%s%s.tar.gz\">Download</a>",
 439                                         relpath, strippedname);
 440         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 441 }
 442
 443 void
 444 writefooter(FILE *fp)
 445 {
 446         fputs("</div>\n</body>\n</html>\n", fp);
 447 }
 448
 449 const char *
 450 get_ext(const char *filename)
 451 {
 452         const char *dot = strrchr(filename, '.');
 453         if(!dot || dot == filename) return "";
 454         return dot + 1;
 455 }
 456
 457 void
 458 call_chroma(const char *filename, FILE *fp, const char *s, size_t len)
 459 {
 460         htmlized = false;
 461         char *html = "";
 462         // Flush HTML-file
 463         fflush(fp);
 464
 465 #ifdef HAS_CMARK
 466         html = cmark_markdown_to_html(s, len, CMARK_OPT_DEFAULT);
 467         if (strcmp(get_ext(filename), "md") == 0) htmlized = true;
 468 #endif
 469
 470 #ifdef HAS_CHROMA
 471         if (!htmlized) {
 472                 // Copy STDOUT
 473                 int stdout_copy = dup(1);
 474
 475                 // Redirect STDOUT
 476                 dup2(fileno(fp), 1);
 477
 478                 char cmd[255] = "chroma --html --html-only --html-lines --html-lines-table --filename ";
 479                 strncat(cmd, filename, strlen(filename) + 1);
 480                 FILE *child = popen(cmd, "w");
 481                 if (child == NULL) {
 482                         printf("child is null: %s", strerror(errno));
 483                         exit(1);
 484                 }
 485
 486                 // Give code to highlight through STDIN:
 487                 size_t i;
 488                 for (i = 0; *s && i < len; s++, i++) {
 489                         fprintf(child, "%c", *s);
 490                 }
 491
 492                 pclose(child);
 493                 fflush(stdout);
 494
 495                 // Give back STDOUT.
 496                 dup2(stdout_copy, 1);
 497
 498         } else {
 499                 fprintf(fp, "%s", html);
 500         }
 501 #else
 502                 fprintf(fp, "<pre>%s</pre>", s);
 503 #endif
 504 }
 505
 506 void
 507 writeblobhtml(const char *filename, FILE *fp, const git_blob *blob)
 508 {
 509         const char *s = git_blob_rawcontent(blob);
 510         git_off_t len = git_blob_rawsize(blob);
 511
 512         if (len > 0) {
 513                 call_chroma(filename, fp, s, len);
 514         }
 515 }
 516
 517 void
 518 printcommit(FILE *fp, struct commitinfo *ci)
 519 {
 520         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 521                         relpath, ci->oid, ci->oid);
 522
 523         if (ci->parentoid[0])
 524                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 525                                 relpath, ci->parentoid, ci->parentoid);
 526
 527         if (ci->author) {
 528                 fputs("<b>Author:</b> ", fp);
 529                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 530                 fputs(" &lt;<a href=\"mailto:", fp);
 531                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 532                 fputs("\">", fp);
 533                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 534                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 535                 printtime(fp, &(ci->author->when));
 536                 fputc('\n', fp);
 537         }
 538         if (ci->msg) {
 539                 fputc('\n', fp);
 540                 xmlencode(fp, ci->msg, strlen(ci->msg));
 541                 fputc('\n', fp);
 542         }
 543 }
 544
 545 void
 546 printshowfile(FILE *fp, struct commitinfo *ci)
 547 {
 548         const git_diff_delta *delta;
 549         const git_diff_hunk *hunk;
 550         const git_diff_line *line;
 551         git_patch *patch;
 552         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 553         char linestr[80];
 554         int c;
 555
 556         printcommit(fp, ci);
 557
 558         if (!ci->deltas)
 559                 return;
 560
 561         if (ci->filecount > 1000   ||
 562             ci->ndeltas   > 1000   ||
 563             ci->addcount  > 100000 ||
 564             ci->delcount  > 100000) {
 565                 fputs("Diff is too large, output suppressed.\n", fp);
 566                 return;
 567         }
 568
 569         /* diff stat */
 570         fputs("<b>Diffstat:</b>\n<table>", fp);
 571         for (i = 0; i < ci->ndeltas; i++) {
 572                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 573
 574                 switch (delta->status) {
 575                 case GIT_DELTA_ADDED:      c = 'A'; break;
 576                 case GIT_DELTA_COPIED:     c = 'C'; break;
 577                 case GIT_DELTA_DELETED:    c = 'D'; break;
 578                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 579                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 580                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 581                 default:                   c = ' '; break;
 582                 }
 583                 if (c == ' ')
 584                         fprintf(fp, "<tr><td>%c", c);
 585                 else
 586                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 587
 588                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 589                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 590                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 591                         fputs(" -&gt; ", fp);
 592                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 593                 }
 594
 595                 add = ci->deltas[i]->addcount;
 596                 del = ci->deltas[i]->delcount;
 597                 changed = add + del;
 598                 total = sizeof(linestr) - 2;
 599                 if (changed > total) {
 600                         if (add)
 601                                 add = ((float)total / changed * add) + 1;
 602                         if (del)
 603                                 del = ((float)total / changed * del) + 1;
 604                 }
 605                 memset(&linestr, '+', add);
 606                 memset(&linestr[add], '-', del);
 607
 608                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 609                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 610                 fwrite(&linestr, 1, add, fp);
 611                 fputs("</span><span class=\"d\">", fp);
 612                 fwrite(&linestr[add], 1, del, fp);
 613                 fputs("</span></td></tr>\n", fp);
 614         }
 615         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 616                 ci->filecount, ci->filecount == 1 ? "" : "s",
 617                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 618                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 619
 620         fputs("<hr/>", fp);
 621
 622         for (i = 0; i < ci->ndeltas; i++) {
 623                 patch = ci->deltas[i]->patch;
 624                 delta = git_patch_get_delta(patch);
 625                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 626                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 627                 fputs(".html\">", fp);
 628                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 629                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 630                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 631                 fprintf(fp, ".html\">");
 632                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 633                 fprintf(fp, "</a></b>\n");
 634
 635                 /* check binary data */
 636                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 637                         fputs("Binary files differ.\n", fp);
 638                         continue;
 639                 }
 640
 641                 nhunks = git_patch_num_hunks(patch);
 642                 for (j = 0; j < nhunks; j++) {
 643                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 644                                 break;
 645
 646                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 647                         xmlencode(fp, hunk->header, hunk->header_len);
 648                         fputs("</a>", fp);
 649
 650                         for (k = 0; ; k++) {
 651                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 652                                         break;
 653                                 if (line->old_lineno == -1)
 654                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 655                                                 i, j, k, i, j, k);
 656                                 else if (line->new_lineno == -1)
 657                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 658                                                 i, j, k, i, j, k);
 659                                 else
 660                                         putc(' ', fp);
 661                                 xmlencodeline(fp, line->content, line->content_len);
 662                                 putc('\n', fp);
 663                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 664                                         fputs("</a>", fp);
 665                         }
 666                 }
 667         }
 668 }
 669
 670 void
 671 writelogline(FILE *fp, struct commitinfo *ci)
 672 {
 673         fputs("<tr><td>", fp);
 674         if (ci->author)
 675                 printtimeshort(fp, &(ci->author->when));
 676         fputs("</td><td>", fp);
 677         if (ci->summary) {
 678                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 679                 xmlencode(fp, ci->summary, strlen(ci->summary));
 680                 fputs("</a>", fp);
 681         }
 682         fputs("</td><td>", fp);
 683         if (ci->author)
 684                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 685         fputs("</td><td class=\"num\" align=\"right\">", fp);
 686         fprintf(fp, "%zu", ci->filecount);
 687         fputs("</td><td class=\"num\" align=\"right\">", fp);
 688         fprintf(fp, "+%zu", ci->addcount);
 689         fputs("</td><td class=\"num\" align=\"right\">", fp);
 690         fprintf(fp, "-%zu", ci->delcount);
 691         fputs("</td></tr>\n", fp);
 692 }
 693
 694 int
 695 writelog(FILE *fp, const git_oid *oid)
 696 {
 697         struct commitinfo *ci;
 698         git_revwalk *w = NULL;
 699         git_oid id;
 700         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 701         FILE *fpfile;
 702         int r;
 703
 704         git_revwalk_new(&w, repo);
 705         git_revwalk_push(w, oid);
 706         git_revwalk_simplify_first_parent(w);
 707
 708         while (!git_revwalk_next(&id, w)) {
 709                 relpath = "";
 710
 711                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 712                         break;
 713
 714                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 715                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 716                 if (r < 0 || (size_t)r >= sizeof(path))
 717                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 718                 r = access(path, F_OK);
 719
 720                 /* optimization: if there are no log lines to write and
 721                    the commit file already exists: skip the diffstat */
 722                 if (!nlogcommits && !r)
 723                         continue;
 724
 725                 if (!(ci = commitinfo_getbyoid(&id)))
 726                         break;
 727                 /* diffstat: for stagit HTML required for the log.html line */
 728                 if (commitinfo_getstats(ci) == -1)
 729                         goto err;
 730
 731                 if (nlogcommits < 0) {
 732                         writelogline(fp, ci);
 733                 } else if (nlogcommits > 0) {
 734                         writelogline(fp, ci);
 735                         nlogcommits--;
 736                         if (!nlogcommits && ci->parentoid[0])
 737                                 fputs("<tr><td></td><td colspan=\"5\">"
 738                                       "More commits remaining [...]</td>"
 739                                       "</tr>\n", fp);
 740                 }
 741
 742                 if (cachefile)
 743                         writelogline(wcachefp, ci);
 744
 745                 /* check if file exists if so skip it */
 746                 if (r) {
 747                         relpath = "../";
 748                         fpfile = efopen(path, "w");
 749                         writeheader(fpfile, ci->summary);
 750                         fputs("<pre>", fpfile);
 751                         printshowfile(fpfile, ci);
 752                         fputs("</pre>\n", fpfile);
 753                         writefooter(fpfile);
 754                         fclose(fpfile);
 755                 }
 756 err:
 757                 commitinfo_free(ci);
 758         }
 759         git_revwalk_free(w);
 760
 761         relpath = "";
 762
 763         return 0;
 764 }
 765
 766 void
 767 printcommitatom(FILE *fp, struct commitinfo *ci)
 768 {
 769         fputs("<entry>\n", fp);
 770
 771         fprintf(fp, "<id>%s</id>\n", ci->oid);
 772         if (ci->author) {
 773                 fputs("<published>", fp);
 774                 printtimez(fp, &(ci->author->when));
 775                 fputs("</published>\n", fp);
 776         }
 777         if (ci->committer) {
 778                 fputs("<updated>", fp);
 779                 printtimez(fp, &(ci->committer->when));
 780                 fputs("</updated>\n", fp);
 781         }
 782         if (ci->summary) {
 783                 fputs("<title type=\"text\">", fp);
 784                 xmlencode(fp, ci->summary, strlen(ci->summary));
 785                 fputs("</title>\n", fp);
 786         }
 787         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />\n",
 788                 ci->oid);
 789
 790         if (ci->author) {
 791                 fputs("<author>\n<name>", fp);
 792                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 793                 fputs("</name>\n<email>", fp);
 794                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 795                 fputs("</email>\n</author>\n", fp);
 796         }
 797
 798         fputs("<content type=\"text\">", fp);
 799         fprintf(fp, "commit %s\n", ci->oid);
 800         if (ci->parentoid[0])
 801                 fprintf(fp, "parent %s\n", ci->parentoid);
 802         if (ci->author) {
 803                 fputs("Author: ", fp);
 804                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 805                 fputs(" &lt;", fp);
 806                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 807                 fputs("&gt;\nDate:   ", fp);
 808                 printtime(fp, &(ci->author->when));
 809                 fputc('\n', fp);
 810         }
 811         if (ci->msg) {
 812                 fputc('\n', fp);
 813                 xmlencode(fp, ci->msg, strlen(ci->msg));
 814         }
 815         fputs("\n</content>\n</entry>\n", fp);
 816 }
 817
 818 int
 819 writeatom(FILE *fp)
 820 {
 821         struct commitinfo *ci;
 822         git_revwalk *w = NULL;
 823         git_oid id;
 824         size_t i, m = 100; /* last 'm' commits */
 825
 826         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 827               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 828         xmlencode(fp, strippedname, strlen(strippedname));
 829         fputs(", branch HEAD</title>\n<subtitle>", fp);
 830         xmlencode(fp, description, strlen(description));
 831         fputs("</subtitle>\n", fp);
 832
 833         git_revwalk_new(&w, repo);
 834         git_revwalk_push_head(w);
 835         git_revwalk_simplify_first_parent(w);
 836
 837         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 838                 if (!(ci = commitinfo_getbyoid(&id)))
 839                         break;
 840                 printcommitatom(fp, ci);
 841                 commitinfo_free(ci);
 842         }
 843         git_revwalk_free(w);
 844
 845         fputs("</feed>\n", fp);
 846
 847         return 0;
 848 }
 849
 850 float
 851 rounder(float var)
 852 {
 853     int value = var * 10 + .5;
 854     return value / 10.0;
 855 }
 856
 857 const char *
 858 convertbytes(int bytes)
 859 {
 860         bytes = (float)bytes;
 861         static char outp[25];
 862         if (bytes < 1024) sprintf(outp, "%u %s", bytes, "B");
 863         else if (bytes < 1048576) sprintf(outp, "%0.1f %s", rounder(bytes/1024.0), "K");
 864         else sprintf(outp, "%0.1f %s", rounder(bytes/1048576.0), "M");
 865         return outp;
 866 }
 867
 868 void
 869 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 870 {
 871         char tmp[PATH_MAX] = "", *d;
 872         const char *p;
 873         FILE *fp;
 874
 875         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 876                 errx(1, "path truncated: '%s'", fpath);
 877         if (!(d = dirname(tmp)))
 878                 err(1, "dirname");
 879         mkdirp(d);
 880
 881         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 882                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 883                         errx(1, "path truncated: '../%s'", tmp);
 884         }
 885         relpath = tmp;
 886
 887         fp = efopen(fpath, "w");
 888         writeheader(fp, filename);
 889         fputs("<p> ", fp);
 890         xmlencode(fp, filename, strlen(filename));
 891         fprintf(fp, " (%s)", convertbytes((int)filesize));
 892
 893 #ifdef HAS_CMARK
 894         char newfpath[PATH_MAX];
 895         char newfilename[PATH_MAX];
 896         if (strcmp(get_ext(filename), "md") == 0) {
 897                 fprintf(fp, " <a href=\"%s.html-raw\">View raw</a>", filename);
 898                 strcpy(newfpath, fpath);
 899                 strcat(newfpath, "-raw");
 900
 901                 strcpy(newfilename, filename);
 902                 strcat(newfilename, "-raw");
 903                 strcpy(oldfilename, filename);
 904
 905                 /* NOTE: recurses */
 906                 writeblob(obj, newfpath, newfilename, filesize);
 907         } else if (strcmp(get_ext(filename), "md-raw" ) == 0) {
 908                 fprintf(fp, " <a href=\"%s.html\">View rendered</a>", oldfilename);
 909         }
 910 #endif
 911
 912         fputs(".</p><hr/>", fp);
 913
 914         if (git_blob_is_binary((git_blob *)obj)) {
 915                 fputs("<p>Binary file.</p>\n", fp);
 916         } else {
 917                 writeblobhtml(filename, fp, (git_blob *)obj);
 918                 if (ferror(fp))
 919                         err(1, "fwrite");
 920         }
 921
 922         writefooter(fp);
 923         fclose(fp);
 924
 925         relpath = "";
 926 }
 927
 928 const char *
 929 filemode(git_filemode_t m)
 930 {
 931         static char mode[11];
 932
 933         memset(mode, '-', sizeof(mode) - 1);
 934         mode[10] = '\0';
 935
 936         if (S_ISREG(m))
 937                 mode[0] = '-';
 938         else if (S_ISBLK(m))
 939                 mode[0] = 'b';
 940         else if (S_ISCHR(m))
 941                 mode[0] = 'c';
 942         else if (S_ISDIR(m))
 943                 mode[0] = 'd';
 944         else if (S_ISFIFO(m))
 945                 mode[0] = 'p';
 946         else if (S_ISLNK(m))
 947                 mode[0] = 'l';
 948         else if (S_ISSOCK(m))
 949                 mode[0] = 's';
 950         else
 951                 mode[0] = '?';
 952
 953         if (m & S_IRUSR) mode[1] = 'r';
 954         if (m & S_IWUSR) mode[2] = 'w';
 955         if (m & S_IXUSR) mode[3] = 'x';
 956         if (m & S_IRGRP) mode[4] = 'r';
 957         if (m & S_IWGRP) mode[5] = 'w';
 958         if (m & S_IXGRP) mode[6] = 'x';
 959         if (m & S_IROTH) mode[7] = 'r';
 960         if (m & S_IWOTH) mode[8] = 'w';
 961         if (m & S_IXOTH) mode[9] = 'x';
 962
 963         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 964         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 965         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 966
 967         return mode;
 968 }
 969
 970 int
 971 writefilestree(FILE *fp, git_tree *tree, const char *path)
 972 {
 973         const git_tree_entry *entry = NULL;
 974         git_submodule *module = NULL;
 975         git_object *obj = NULL;
 976         git_off_t filesize;
 977         const char *entryname;
 978         char filepath[PATH_MAX], entrypath[PATH_MAX];
 979         size_t count, i;
 980         int r, ret;
 981
 982         count = git_tree_entrycount(tree);
 983         for (i = 0; i < count; i++) {
 984                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 985                     !(entryname = git_tree_entry_name(entry)))
 986                         return -1;
 987                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 988
 989                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 990                          entrypath);
 991                 if (r < 0 || (size_t)r >= sizeof(filepath))
 992                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 993
 994                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 995                         switch (git_object_type(obj)) {
 996                         case GIT_OBJ_BLOB:
 997                                 break;
 998                         case GIT_OBJ_TREE:
 999                                 /* NOTE: recurses */
1000                                 ret = writefilestree(fp, (git_tree *)obj,
1001                                                      entrypath);
1002                                 git_object_free(obj);
1003                                 if (ret)
1004                                         return ret;
1005                                 continue;
1006                         default:
1007                                 git_object_free(obj);
1008                                 continue;
1009                         }
1010
1011                         filesize = git_blob_rawsize((git_blob *)obj);
1012                         writeblob(obj, filepath, entryname, filesize);
1013
1014                         fputs("<tr><td>", fp);
1015                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
1016                         fprintf(fp, "</td><td><a href=\"%s", relpath);
1017                         xmlencode(fp, filepath, strlen(filepath));
1018                         fputs("\">", fp);
1019                         xmlencode(fp, entrypath, strlen(entrypath));
1020                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
1021                         fprintf(fp, "%s", convertbytes((int)filesize));
1022                         fputs("</td></tr>\n", fp);
1023                         git_object_free(obj);
1024                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
1025                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
1026                                 relpath);
1027                         xmlencode(fp, entrypath, strlen(entrypath));
1028                         git_submodule_free(module);
1029                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
1030                 }
1031         }
1032
1033         return 0;
1034 }
1035
1036 int
1037 writefiles(FILE *fp, const git_oid *id)
1038 {
1039         git_tree *tree = NULL;
1040         git_commit *commit = NULL;
1041         int ret = -1;
1042
1043         fputs("<table id=\"files\"><thead>\n<tr>"
1044               "<td><b>Mode</b></td><td><b>Name</b></td>"
1045               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
1046               "</tr>\n</thead><tbody>\n", fp);
1047
1048         if (!git_commit_lookup(&commit, repo, id) &&
1049             !git_commit_tree(&tree, commit))
1050                 ret = writefilestree(fp, tree, "");
1051
1052         fputs("</tbody></table>", fp);
1053
1054         git_commit_free(commit);
1055         git_tree_free(tree);
1056
1057         return ret;
1058 }
1059
1060 int
1061 refs_cmp(const void *v1, const void *v2)
1062 {
1063         git_reference *r1 = (*(git_reference **)v1);
1064         git_reference *r2 = (*(git_reference **)v2);
1065         int r;
1066
1067         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
1068                 return r;
1069
1070         return strcmp(git_reference_shorthand(r1),
1071                       git_reference_shorthand(r2));
1072 }
1073
1074 int
1075 writerefs(FILE *fp)
1076 {
1077         struct commitinfo *ci;
1078         const git_oid *id = NULL;
1079         git_object *obj = NULL;
1080         git_reference *dref = NULL, *r, *ref = NULL;
1081         git_reference_iterator *it = NULL;
1082         git_reference **refs = NULL;
1083         size_t count, i, j, refcount;
1084         const char *titles[] = { "Branches", "Tags" };
1085         const char *ids[] = { "branches", "tags" };
1086         const char *name;
1087
1088         if (git_reference_iterator_new(&it, repo))
1089                 return -1;
1090
1091         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
1092                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
1093                         err(1, "realloc");
1094                 refs[refcount] = ref;
1095         }
1096         git_reference_iterator_free(it);
1097
1098         /* sort by type then shorthand name */
1099         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
1100
1101         for (j = 0; j < 2; j++) {
1102                 for (i = 0, count = 0; i < refcount; i++) {
1103                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
1104                             !(git_reference_is_tag(refs[i]) && j == 1))
1105                                 continue;
1106
1107                         switch (git_reference_type(refs[i])) {
1108                         case GIT_REF_SYMBOLIC:
1109                                 if (git_reference_resolve(&dref, refs[i]))
1110                                         goto err;
1111                                 r = dref;
1112                                 break;
1113                         case GIT_REF_OID:
1114                                 r = refs[i];
1115                                 break;
1116                         default:
1117                                 continue;
1118                         }
1119                         if (!git_reference_target(r) ||
1120                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1121                                 goto err;
1122                         if (!(id = git_object_id(obj)))
1123                                 goto err;
1124                         if (!(ci = commitinfo_getbyoid(id)))
1125                                 break;
1126
1127                         /* print header if it has an entry (first). */
1128                         if (++count == 1) {
1129                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1130                                         "<thead>\n<tr><td><b>Name</b></td>"
1131                                         "<td><b>Last commit date</b></td>"
1132                                         "<td><b>Author</b></td>\n</tr>\n"
1133                                         "</thead><tbody>\n",
1134                                          titles[j], ids[j]);
1135                         }
1136
1137                         relpath = "";
1138                         name = git_reference_shorthand(r);
1139
1140                         fputs("<tr><td>", fp);
1141                         xmlencode(fp, name, strlen(name));
1142                         fputs("</td><td>", fp);
1143                         if (ci->author)
1144                                 printtimeshort(fp, &(ci->author->when));
1145                         fputs("</td><td>", fp);
1146                         if (ci->author)
1147                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1148                         fputs("</td></tr>\n", fp);
1149
1150                         relpath = "../";
1151
1152                         commitinfo_free(ci);
1153                         git_object_free(obj);
1154                         obj = NULL;
1155                         git_reference_free(dref);
1156                         dref = NULL;
1157                 }
1158                 /* table footer */
1159                 if (count)
1160                         fputs("</tbody></table><br/>", fp);
1161         }
1162
1163 err:
1164         git_object_free(obj);
1165         git_reference_free(dref);
1166
1167         for (i = 0; i < refcount; i++)
1168                 git_reference_free(refs[i]);
1169         free(refs);
1170
1171         return 0;
1172 }
1173
1174 void
1175 usage(char *argv0)
1176 {
1177         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1178         exit(1);
1179 }
1180
1181 int
1182 main(int argc, char *argv[])
1183 {
1184         git_object *obj = NULL;
1185         const git_oid *head = NULL;
1186         mode_t mask;
1187         FILE *fp, *fpread;
1188         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1189         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1190         size_t n;
1191         int i, fd;
1192
1193         for (i = 1; i < argc; i++) {
1194                 if (argv[i][0] != '-') {
1195                         if (repodir)
1196                                 usage(argv[0]);
1197                         repodir = argv[i];
1198                 } else if (argv[i][1] == 'c') {
1199                         if (nlogcommits > 0 || i + 1 >= argc)
1200                                 usage(argv[0]);
1201                         cachefile = argv[++i];
1202                 } else if (argv[i][1] == 'l') {
1203                         if (cachefile || i + 1 >= argc)
1204                                 usage(argv[0]);
1205                         errno = 0;
1206                         nlogcommits = strtoll(argv[++i], &p, 10);
1207                         if (argv[i][0] == '\0' || *p != '\0' ||
1208                             nlogcommits <= 0 || errno)
1209                                 usage(argv[0]);
1210                 }
1211         }
1212         if (!repodir)
1213                 usage(argv[0]);
1214
1215         if (!realpath(repodir, repodirabs))
1216                 err(1, "realpath");
1217
1218         git_libgit2_init();
1219
1220 #ifdef __OpenBSD__
1221         if (unveil(repodir, "r") == -1)
1222                 err(1, "unveil: %s", repodir);
1223         if (unveil(".", "rwc") == -1)
1224                 err(1, "unveil: .");
1225         if (cachefile && unveil(cachefile, "rwc") == -1)
1226                 err(1, "unveil: %s", cachefile);
1227
1228         if (cachefile) {
1229                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1230                         err(1, "pledge");
1231         } else {
1232                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1233                         err(1, "pledge");
1234         }
1235 #endif
1236
1237         if (git_repository_open_ext(&repo, repodir,
1238                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1239                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1240                 return 1;
1241         }
1242
1243         /* find HEAD */
1244         if (!git_revparse_single(&obj, repo, "HEAD"))
1245                 head = git_object_id(obj);
1246         git_object_free(obj);
1247
1248         /* use directory name as name */
1249         if ((name = strrchr(repodirabs, '/')))
1250                 name++;
1251         else
1252                 name = "";
1253
1254         /* copy css */
1255         char cwd[PATH_MAX];
1256         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1257         cp("/usr/local/share/stagit/syntax.css", strcat(cwd, "/syntax.css"));
1258         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1259         cp("/usr/local/share/stagit/style.css", strcat(cwd, "/style.css"));
1260
1261         /* strip .git suffix */
1262         if (!(strippedname = strdup(name)))
1263                 err(1, "strdup");
1264         if ((p = strrchr(strippedname, '.')))
1265                 if (!strcmp(p, ".git"))
1266                         *p = '\0';
1267
1268         /* read description or .git/description */
1269         joinpath(path, sizeof(path), repodir, "description");
1270         if (!(fpread = fopen(path, "r"))) {
1271                 joinpath(path, sizeof(path), repodir, ".git/description");
1272                 fpread = fopen(path, "r");
1273         }
1274         if (fpread) {
1275                 if (!fgets(description, sizeof(description), fpread))
1276                         description[0] = '\0';
1277                 fclose(fpread);
1278         }
1279
1280         /* read url or .git/url */
1281         joinpath(path, sizeof(path), repodir, "url");
1282         if (!(fpread = fopen(path, "r"))) {
1283                 joinpath(path, sizeof(path), repodir, ".git/url");
1284                 fpread = fopen(path, "r");
1285         }
1286         if (fpread) {
1287                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1288                         cloneurl[0] = '\0';
1289                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1290                 fclose(fpread);
1291         }
1292
1293         /* check LICENSE */
1294         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1295                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1296                     git_object_type(obj) == GIT_OBJ_BLOB)
1297                         license = licensefiles[i] + strlen("HEAD:");
1298                 git_object_free(obj);
1299         }
1300
1301         /* check README */
1302         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1303                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1304                     git_object_type(obj) == GIT_OBJ_BLOB)
1305                         readme = readmefiles[i] + strlen("HEAD:");
1306                 git_object_free(obj);
1307         }
1308
1309         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1310             git_object_type(obj) == GIT_OBJ_BLOB)
1311                 submodules = ".gitmodules";
1312         git_object_free(obj);
1313
1314         /* Generate tarball */
1315         char tarball[255];
1316         sprintf(tarball, "tar -zcf %s.tar.gz --ignore-failed-read --exclude='.git' %s",
1317                             strippedname, repodir);
1318         system(tarball);
1319
1320         /* log for HEAD */
1321         fp = efopen("log.html", "w");
1322         relpath = "";
1323         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1324         writeheader(fp, "Log");
1325         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1326               "<td><b>Commit</b></td>"
1327               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1328               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1329               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1330
1331         if (cachefile && head) {
1332                 /* read from cache file (does not need to exist) */
1333                 if ((rcachefp = fopen(cachefile, "r"))) {
1334                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1335                                 errx(1, "%s: no object id", cachefile);
1336                         if (git_oid_fromstr(&lastoid, lastoidstr))
1337                                 errx(1, "%s: invalid object id", cachefile);
1338                 }
1339
1340                 /* write log to (temporary) cache */
1341                 if ((fd = mkstemp(tmppath)) == -1)
1342                         err(1, "mkstemp");
1343                 if (!(wcachefp = fdopen(fd, "w")))
1344                         err(1, "fdopen: '%s'", tmppath);
1345                 /* write last commit id (HEAD) */
1346                 git_oid_tostr(buf, sizeof(buf), head);
1347                 fprintf(wcachefp, "%s\n", buf);
1348
1349                 writelog(fp, head);
1350
1351                 if (rcachefp) {
1352                         /* append previous log to log.html and the new cache */
1353                         while (!feof(rcachefp)) {
1354                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1355                                 if (ferror(rcachefp))
1356                                         err(1, "fread");
1357                                 if (fwrite(buf, 1, n, fp) != n ||
1358                                     fwrite(buf, 1, n, wcachefp) != n)
1359                                         err(1, "fwrite");
1360                         }
1361                         fclose(rcachefp);
1362                 }
1363                 fclose(wcachefp);
1364         } else {
1365                 if (head)
1366                         writelog(fp, head);
1367         }
1368
1369         fputs("</tbody></table>", fp);
1370         writefooter(fp);
1371         fclose(fp);
1372
1373         /* files for HEAD */
1374         fp = efopen("files.html", "w");
1375         writeheader(fp, "Files");
1376         if (head)
1377                 writefiles(fp, head);
1378         writefooter(fp);
1379         fclose(fp);
1380
1381         cp("files.html", "index.html");
1382
1383         /* summary page with branches and tags */
1384         fp = efopen("refs.html", "w");
1385         writeheader(fp, "Refs");
1386         writerefs(fp);
1387         writefooter(fp);
1388         fclose(fp);
1389
1390         /* Atom feed */
1391         fp = efopen("atom.xml", "w");
1392         writeatom(fp);
1393         fclose(fp);
1394
1395         /* rename new cache file on success */
1396         if (cachefile && head) {
1397                 if (rename(tmppath, cachefile))
1398                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1399                 umask((mask = umask(0)));
1400                 if (chmod(cachefile,
1401                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1402                         err(1, "chmod: '%s'", cachefile);
1403         }
1404
1405         /* cleanup */
1406         git_repository_free(repo);
1407         git_libgit2_shutdown();
1408
1409         return 0;
1410 }