stagit.c

   1 #include <sys/stat.h>
   2
   3 #include <err.h>
   4 #include <errno.h>
   5 #include <inttypes.h>
   6 #include <libgen.h>
   7 #include <limits.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12
  13 #include <git2.h>
  14
  15 #include "compat.h"
  16
  17 struct deltainfo {
  18         git_patch *patch;
  19
  20         size_t addcount;
  21         size_t delcount;
  22 };
  23
  24 struct commitinfo {
  25         const git_oid *id;
  26
  27         char oid[GIT_OID_HEXSZ + 1];
  28         char parentoid[GIT_OID_HEXSZ + 1];
  29
  30         const git_signature *author;
  31         const git_signature *committer;
  32         const char          *summary;
  33         const char          *msg;
  34
  35         git_diff   *diff;
  36         git_commit *commit;
  37         git_commit *parent;
  38         git_tree   *commit_tree;
  39         git_tree   *parent_tree;
  40
  41         size_t addcount;
  42         size_t delcount;
  43         size_t filecount;
  44
  45         struct deltainfo **deltas;
  46         size_t ndeltas;
  47 };
  48
  49 /* summary length (bytes) in the log */
  50 static const unsigned summarylen = 70;
  51 /* display line count or file size in file tree index */
  52 static const int showlinecount = 1;
  53
  54 static git_repository *repo;
  55
  56 static const char *relpath = "";
  57 static const char *repodir;
  58
  59 static char *name = "";
  60 static char *strippedname;
  61 static char description[255];
  62 static char cloneurl[1024];
  63 static int haslicense, hasreadme, hassubmodules;
  64
  65 /* cache */
  66 static git_oid lastoid;
  67 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  68 static FILE *rcachefp, *wcachefp;
  69 static const char *cachefile;
  70
  71 #ifndef USE_PLEDGE
  72 int
  73 pledge(const char *promises, const char *paths[])
  74 {
  75         return 0;
  76 }
  77 #endif
  78
  79 void
  80 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  81 {
  82         int r;
  83
  84         r = snprintf(buf, bufsiz, "%s%s%s",
  85                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  86         if (r == -1 || (size_t)r >= bufsiz)
  87                 errx(1, "path truncated: '%s%s%s'",
  88                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  89 }
  90
  91 void
  92 deltainfo_free(struct deltainfo *di)
  93 {
  94         if (!di)
  95                 return;
  96         git_patch_free(di->patch);
  97         di->patch = NULL;
  98         free(di);
  99 }
 100
 101 int
 102 commitinfo_getstats(struct commitinfo *ci)
 103 {
 104         struct deltainfo *di;
 105         const git_diff_delta *delta;
 106         const git_diff_hunk *hunk;
 107         const git_diff_line *line;
 108         git_patch *patch = NULL;
 109         size_t ndeltas, nhunks, nhunklines;
 110         size_t i, j, k;
 111
 112         ndeltas = git_diff_num_deltas(ci->diff);
 113         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 114                 err(1, "calloc");
 115
 116         for (i = 0; i < ndeltas; i++) {
 117                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 118                         err(1, "calloc");
 119                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 120                         git_patch_free(patch);
 121                         goto err;
 122                 }
 123                 di->patch = patch;
 124                 ci->deltas[i] = di;
 125
 126                 delta = git_patch_get_delta(patch);
 127
 128                 /* check binary data */
 129                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 130                         continue;
 131
 132                 nhunks = git_patch_num_hunks(patch);
 133                 for (j = 0; j < nhunks; j++) {
 134                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 135                                 break;
 136                         for (k = 0; ; k++) {
 137                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 138                                         break;
 139                                 if (line->old_lineno == -1) {
 140                                         di->addcount++;
 141                                         ci->addcount++;
 142                                 } else if (line->new_lineno == -1) {
 143                                         di->delcount++;
 144                                         ci->delcount++;
 145                                 }
 146                         }
 147                 }
 148         }
 149         ci->ndeltas = i;
 150         ci->filecount = i;
 151
 152         return 0;
 153
 154 err:
 155         if (ci->deltas)
 156                 for (i = 0; i < ci->ndeltas; i++)
 157                         deltainfo_free(ci->deltas[i]);
 158         free(ci->deltas);
 159         ci->deltas = NULL;
 160         ci->ndeltas = 0;
 161         ci->addcount = 0;
 162         ci->delcount = 0;
 163         ci->filecount = 0;
 164
 165         return -1;
 166 }
 167
 168 void
 169 commitinfo_free(struct commitinfo *ci)
 170 {
 171         size_t i;
 172
 173         if (!ci)
 174                 return;
 175         if (ci->deltas)
 176                 for (i = 0; i < ci->ndeltas; i++)
 177                         deltainfo_free(ci->deltas[i]);
 178         free(ci->deltas);
 179         ci->deltas = NULL;
 180         git_diff_free(ci->diff);
 181         git_tree_free(ci->commit_tree);
 182         git_tree_free(ci->parent_tree);
 183         git_commit_free(ci->commit);
 184 }
 185
 186 struct commitinfo *
 187 commitinfo_getbyoid(const git_oid *id)
 188 {
 189         struct commitinfo *ci;
 190         git_diff_options opts;
 191
 192         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 193                 err(1, "calloc");
 194
 195         if (git_commit_lookup(&(ci->commit), repo, id))
 196                 goto err;
 197         ci->id = id;
 198
 199         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 200         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 201
 202         ci->author = git_commit_author(ci->commit);
 203         ci->committer = git_commit_committer(ci->commit);
 204         ci->summary = git_commit_summary(ci->commit);
 205         ci->msg = git_commit_message(ci->commit);
 206
 207         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 208                 goto err;
 209         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 210                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 211                         ci->parent = NULL;
 212                         ci->parent_tree = NULL;
 213                 }
 214         }
 215
 216         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 217         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 218         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 219                 goto err;
 220         if (commitinfo_getstats(ci) == -1)
 221                 goto err;
 222
 223         return ci;
 224
 225 err:
 226         commitinfo_free(ci);
 227         free(ci);
 228
 229         return NULL;
 230 }
 231
 232 FILE *
 233 efopen(const char *name, const char *flags)
 234 {
 235         FILE *fp;
 236
 237         if (!(fp = fopen(name, flags)))
 238                 err(1, "fopen");
 239
 240         return fp;
 241 }
 242
 243 /* Escape characters below as HTML 2.0 / XML 1.0. */
 244 void
 245 xmlencode(FILE *fp, const char *s, size_t len)
 246 {
 247         size_t i;
 248
 249         for (i = 0; *s && i < len; s++, i++) {
 250                 switch(*s) {
 251                 case '<':  fputs("&lt;",   fp); break;
 252                 case '>':  fputs("&gt;",   fp); break;
 253                 case '\'': fputs("&apos;", fp); break;
 254                 case '&':  fputs("&amp;",  fp); break;
 255                 case '"':  fputs("&quot;", fp); break;
 256                 default:   fputc(*s, fp);
 257                 }
 258         }
 259 }
 260
 261 int
 262 mkdirp(const char *path)
 263 {
 264         char tmp[PATH_MAX], *p;
 265
 266         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 267                 errx(1, "path truncated: '%s'", path);
 268         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 269                 if (*p != '/')
 270                         continue;
 271                 *p = '\0';
 272                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 273                         return -1;
 274                 *p = '/';
 275         }
 276         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 277                 return -1;
 278         return 0;
 279 }
 280
 281 void
 282 printtimez(FILE *fp, const git_time *intime)
 283 {
 284         struct tm *intm;
 285         time_t t;
 286         char out[32];
 287
 288         t = (time_t)intime->time;
 289         if (!(intm = gmtime(&t)))
 290                 return;
 291         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 292         fputs(out, fp);
 293 }
 294
 295 void
 296 printtime(FILE *fp, const git_time *intime)
 297 {
 298         struct tm *intm;
 299         time_t t;
 300         int offset, sign = '+';
 301         char out[32];
 302
 303         offset = intime->offset * 60;
 304         t = (time_t)intime->time + offset;
 305         if (!(intm = gmtime(&t)))
 306                 return;
 307         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 308         if (offset < 0) {
 309                 offset = -offset;
 310                 sign = '-';
 311         }
 312         fprintf(fp, "%s %c%02d%02d", out, sign, offset / 60, offset % 60);
 313 }
 314
 315 void
 316 printtimeshort(FILE *fp, const git_time *intime)
 317 {
 318         struct tm *intm;
 319         time_t t;
 320         char out[32];
 321
 322         t = (time_t)intime->time;
 323         if (!(intm = gmtime(&t)))
 324                 return;
 325         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 326         fputs(out, fp);
 327 }
 328
 329 void
 330 writeheader(FILE *fp, const char *title)
 331 {
 332         fputs("<!DOCTYPE html>\n"
 333                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 334                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 335                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 336         xmlencode(fp, title, strlen(title));
 337         if (title[0] && strippedname[0])
 338                 fputs(" - ", fp);
 339         xmlencode(fp, strippedname, strlen(strippedname));
 340         if (description[0])
 341                 fputs(" - ", fp);
 342         xmlencode(fp, description, strlen(description));
 343         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 344         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 345                 name, relpath);
 346         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 347         fputs("</head>\n<body>\n<table><tr><td>", fp);
 348         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 349                 relpath, relpath);
 350         fputs("</td><td><h1>", fp);
 351         xmlencode(fp, strippedname, strlen(strippedname));
 352         fputs("</h1><span class=\"desc\">", fp);
 353         xmlencode(fp, description, strlen(description));
 354         fputs("</span></td></tr>", fp);
 355         if (cloneurl[0]) {
 356                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 357                 xmlencode(fp, cloneurl, strlen(cloneurl));
 358                 fputs("\">", fp);
 359                 xmlencode(fp, cloneurl, strlen(cloneurl));
 360                 fputs("</a></td></tr>", fp);
 361         }
 362         fputs("<tr><td></td><td>\n", fp);
 363         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 364         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 365         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 366         if (hassubmodules)
 367                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 368         if (hasreadme)
 369                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 370         if (haslicense)
 371                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 372         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 373 }
 374
 375 void
 376 writefooter(FILE *fp)
 377 {
 378         fputs("</div>\n</body>\n</html>\n", fp);
 379 }
 380
 381 int
 382 writeblobhtml(FILE *fp, const git_blob *blob)
 383 {
 384         off_t i;
 385         size_t n = 0;
 386         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 387         const char *s = git_blob_rawcontent(blob);
 388         git_off_t len = git_blob_rawsize(blob);
 389
 390         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 391
 392         if (len) {
 393                 n++;
 394                 fprintf(fp, nfmt, n, n, n);
 395                 for (i = 0; i < len - 1; i++) {
 396                         if (s[i] == '\n') {
 397                                 n++;
 398                                 fprintf(fp, nfmt, n, n, n);
 399                         }
 400                 }
 401         }
 402
 403         fputs("</pre></td><td><pre>\n", fp);
 404         xmlencode(fp, s, (size_t)len);
 405         fputs("</pre></td></tr></table>\n", fp);
 406
 407         return n;
 408 }
 409
 410 void
 411 printcommit(FILE *fp, struct commitinfo *ci)
 412 {
 413         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 414                 relpath, ci->oid, ci->oid);
 415
 416         if (ci->parentoid[0])
 417                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 418                         relpath, ci->parentoid, ci->parentoid);
 419
 420         if (ci->author) {
 421                 fputs("<b>Author:</b> ", fp);
 422                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 423                 fputs(" &lt;<a href=\"mailto:", fp);
 424                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 425                 fputs("\">", fp);
 426                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 427                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 428                 printtime(fp, &(ci->author->when));
 429                 fputc('\n', fp);
 430         }
 431         if (ci->msg) {
 432                 fputc('\n', fp);
 433                 xmlencode(fp, ci->msg, strlen(ci->msg));
 434                 fputc('\n', fp);
 435         }
 436 }
 437
 438 void
 439 printshowfile(FILE *fp, struct commitinfo *ci)
 440 {
 441         const git_diff_delta *delta;
 442         const git_diff_hunk *hunk;
 443         const git_diff_line *line;
 444         git_patch *patch;
 445         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 446         char linestr[80];
 447
 448         printcommit(fp, ci);
 449
 450         if (!ci->deltas)
 451                 return;
 452
 453         if (ci->filecount > 1000   ||
 454             ci->ndeltas   > 1000   ||
 455             ci->addcount  > 100000 ||
 456             ci->delcount  > 100000) {
 457                 fprintf(fp, "(diff is too large, output suppressed)");
 458                 return;
 459         }
 460
 461         /* diff stat */
 462         fputs("<b>Diffstat:</b>\n<table>", fp);
 463         for (i = 0; i < ci->ndeltas; i++) {
 464                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 465                 fputs("<tr><td>", fp);
 466                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 467                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 468                         fputs(" -&gt; ", fp);
 469                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 470                 }
 471
 472                 add = ci->deltas[i]->addcount;
 473                 del = ci->deltas[i]->delcount;
 474                 changed = add + del;
 475                 total = sizeof(linestr) - 2;
 476                 if (changed > total) {
 477                         if (add)
 478                                 add = ((float)total / changed * add) + 1;
 479                         if (del)
 480                                 del = ((float)total / changed * del) + 1;
 481                 }
 482                 memset(&linestr, '+', add);
 483                 memset(&linestr[add], '-', del);
 484
 485                 fprintf(fp, "</td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 486                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 487                 fwrite(&linestr, 1, add, fp);
 488                 fputs("</span><span class=\"d\">", fp);
 489                 fwrite(&linestr[add], 1, del, fp);
 490                 fputs("</span></td></tr>\n", fp);
 491         }
 492         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 493                 ci->filecount, ci->filecount == 1 ? "" : "s",
 494                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 495                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 496
 497         fputs("<hr/>", fp);
 498
 499         for (i = 0; i < ci->ndeltas; i++) {
 500                 patch = ci->deltas[i]->patch;
 501                 delta = git_patch_get_delta(patch);
 502                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 503                         relpath, delta->old_file.path, delta->old_file.path,
 504                         relpath, delta->new_file.path, delta->new_file.path);
 505
 506                 /* check binary data */
 507                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 508                         fputs("Binary files differ\n", fp);
 509                         continue;
 510                 }
 511
 512                 nhunks = git_patch_num_hunks(patch);
 513                 for (j = 0; j < nhunks; j++) {
 514                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 515                                 break;
 516
 517                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 518                         xmlencode(fp, hunk->header, hunk->header_len);
 519                         fputs("</a>", fp);
 520
 521                         for (k = 0; ; k++) {
 522                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 523                                         break;
 524                                 if (line->old_lineno == -1)
 525                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 526                                                 i, j, k, i, j, k);
 527                                 else if (line->new_lineno == -1)
 528                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 529                                                 i, j, k, i, j, k);
 530                                 else
 531                                         fputc(' ', fp);
 532                                 xmlencode(fp, line->content, line->content_len);
 533                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 534                                         fputs("</a>", fp);
 535                         }
 536                 }
 537         }
 538 }
 539
 540 void
 541 writelogline(FILE *fp, struct commitinfo *ci)
 542 {
 543         size_t len;
 544
 545         fputs("<tr><td>", fp);
 546         if (ci->author)
 547                 printtimeshort(fp, &(ci->author->when));
 548         fputs("</td><td>", fp);
 549         if (ci->summary) {
 550                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 551                 if ((len = strlen(ci->summary)) > summarylen) {
 552                         xmlencode(fp, ci->summary, summarylen - 1);
 553                         fputs("…", fp);
 554                 } else {
 555                         xmlencode(fp, ci->summary, len);
 556                 }
 557                 fputs("</a>", fp);
 558         }
 559         fputs("</td><td>", fp);
 560         if (ci->author)
 561                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 562         fputs("</td><td class=\"num\">", fp);
 563         fprintf(fp, "%zu", ci->filecount);
 564         fputs("</td><td class=\"num\">", fp);
 565         fprintf(fp, "+%zu", ci->addcount);
 566         fputs("</td><td class=\"num\">", fp);
 567         fprintf(fp, "-%zu", ci->delcount);
 568         fputs("</td></tr>\n", fp);
 569 }
 570
 571 int
 572 writelog(FILE *fp, const git_oid *oid)
 573 {
 574         struct commitinfo *ci;
 575         git_revwalk *w = NULL;
 576         git_oid id;
 577         char path[PATH_MAX];
 578         FILE *fpfile;
 579         int r;
 580
 581         git_revwalk_new(&w, repo);
 582         git_revwalk_push(w, oid);
 583         git_revwalk_sorting(w, GIT_SORT_TIME);
 584         git_revwalk_simplify_first_parent(w);
 585
 586         while (!git_revwalk_next(&id, w)) {
 587                 relpath = "";
 588
 589                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 590                         break;
 591                 if (!(ci = commitinfo_getbyoid(&id)))
 592                         break;
 593
 594                 writelogline(fp, ci);
 595                 if (cachefile)
 596                         writelogline(wcachefp, ci);
 597
 598                 relpath = "../";
 599
 600                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 601                 if (r == -1 || (size_t)r >= sizeof(path))
 602                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 603
 604                 /* check if file exists if so skip it */
 605                 if (access(path, F_OK)) {
 606                         fpfile = efopen(path, "w");
 607                         writeheader(fpfile, ci->summary);
 608                         fputs("<pre>", fpfile);
 609                         printshowfile(fpfile, ci);
 610                         fputs("</pre>\n", fpfile);
 611                         writefooter(fpfile);
 612                         fclose(fpfile);
 613                 }
 614                 commitinfo_free(ci);
 615         }
 616         git_revwalk_free(w);
 617
 618         relpath = "";
 619
 620         return 0;
 621 }
 622
 623 void
 624 printcommitatom(FILE *fp, struct commitinfo *ci)
 625 {
 626         fputs("<entry>\n", fp);
 627
 628         fprintf(fp, "<id>%s</id>\n", ci->oid);
 629         if (ci->author) {
 630                 fputs("<published>", fp);
 631                 printtimez(fp, &(ci->author->when));
 632                 fputs("</published>\n", fp);
 633         }
 634         if (ci->committer) {
 635                 fputs("<updated>", fp);
 636                 printtimez(fp, &(ci->committer->when));
 637                 fputs("</updated>\n", fp);
 638         }
 639         if (ci->summary) {
 640                 fputs("<title type=\"text\">", fp);
 641                 xmlencode(fp, ci->summary, strlen(ci->summary));
 642                 fputs("</title>\n", fp);
 643         }
 644         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 645                 ci->oid);
 646
 647         if (ci->author) {
 648                 fputs("<author><name>", fp);
 649                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 650                 fputs("</name>\n<email>", fp);
 651                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 652                 fputs("</email>\n</author>\n", fp);
 653         }
 654
 655         fputs("<content type=\"text\">", fp);
 656         fprintf(fp, "commit %s\n", ci->oid);
 657         if (ci->parentoid[0])
 658                 fprintf(fp, "parent %s\n", ci->parentoid);
 659         if (ci->author) {
 660                 fputs("Author: ", fp);
 661                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 662                 fputs(" &lt;", fp);
 663                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 664                 fputs("&gt;\nDate:   ", fp);
 665                 printtime(fp, &(ci->author->when));
 666                 fputc('\n', fp);
 667         }
 668         if (ci->msg) {
 669                 fputc('\n', fp);
 670                 xmlencode(fp, ci->msg, strlen(ci->msg));
 671         }
 672         fputs("\n</content>\n</entry>\n", fp);
 673 }
 674
 675 int
 676 writeatom(FILE *fp)
 677 {
 678         struct commitinfo *ci;
 679         git_revwalk *w = NULL;
 680         git_oid id;
 681         size_t i, m = 100; /* last 'm' commits */
 682
 683         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 684               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 685         xmlencode(fp, strippedname, strlen(strippedname));
 686         fputs(", branch HEAD</title>\n<subtitle>", fp);
 687         xmlencode(fp, description, strlen(description));
 688         fputs("</subtitle>\n", fp);
 689
 690         git_revwalk_new(&w, repo);
 691         git_revwalk_push_head(w);
 692         git_revwalk_sorting(w, GIT_SORT_TIME);
 693         git_revwalk_simplify_first_parent(w);
 694
 695         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 696                 if (!(ci = commitinfo_getbyoid(&id)))
 697                         break;
 698                 printcommitatom(fp, ci);
 699                 commitinfo_free(ci);
 700         }
 701         git_revwalk_free(w);
 702
 703         fputs("</feed>", fp);
 704
 705         return 0;
 706 }
 707
 708 int
 709 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 710 {
 711         char tmp[PATH_MAX] = "", *d;
 712         const char *p;
 713         int lc = 0;
 714         FILE *fp;
 715
 716         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 717                 errx(1, "path truncated: '%s'", fpath);
 718         if (!(d = dirname(tmp)))
 719                 err(1, "dirname");
 720         if (mkdirp(d))
 721                 return -1;
 722
 723         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 724                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 725                         errx(1, "path truncated: '../%s'", tmp);
 726                 p++;
 727         }
 728         relpath = tmp;
 729
 730         fp = efopen(fpath, "w");
 731         writeheader(fp, filename);
 732         fputs("<p> ", fp);
 733         xmlencode(fp, filename, strlen(filename));
 734         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 735         fputs("</p><hr/>", fp);
 736
 737         if (git_blob_is_binary((git_blob *)obj)) {
 738                 fputs("<p>Binary file</p>\n", fp);
 739         } else {
 740                 lc = writeblobhtml(fp, (git_blob *)obj);
 741                 if (ferror(fp))
 742                         err(1, "fwrite");
 743         }
 744         writefooter(fp);
 745         fclose(fp);
 746
 747         relpath = "";
 748
 749         return lc;
 750 }
 751
 752 const char *
 753 filemode(git_filemode_t m)
 754 {
 755         static char mode[11];
 756
 757         memset(mode, '-', sizeof(mode) - 1);
 758         mode[10] = '\0';
 759
 760         if (S_ISREG(m))
 761                 mode[0] = '-';
 762         else if (S_ISBLK(m))
 763                 mode[0] = 'b';
 764         else if (S_ISCHR(m))
 765                 mode[0] = 'c';
 766         else if (S_ISDIR(m))
 767                 mode[0] = 'd';
 768         else if (S_ISFIFO(m))
 769                 mode[0] = 'p';
 770         else if (S_ISLNK(m))
 771                 mode[0] = 'l';
 772         else if (S_ISSOCK(m))
 773                 mode[0] = 's';
 774         else
 775                 mode[0] = '?';
 776
 777         if (m & S_IRUSR) mode[1] = 'r';
 778         if (m & S_IWUSR) mode[2] = 'w';
 779         if (m & S_IXUSR) mode[3] = 'x';
 780         if (m & S_IRGRP) mode[4] = 'r';
 781         if (m & S_IWGRP) mode[5] = 'w';
 782         if (m & S_IXGRP) mode[6] = 'x';
 783         if (m & S_IROTH) mode[7] = 'r';
 784         if (m & S_IWOTH) mode[8] = 'w';
 785         if (m & S_IXOTH) mode[9] = 'x';
 786
 787         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 788         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 789         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 790
 791         return mode;
 792 }
 793
 794 int
 795 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 796 {
 797         const git_tree_entry *entry = NULL;
 798         git_submodule *module = NULL;
 799         git_object *obj = NULL;
 800         git_off_t filesize;
 801         const char *entryname;
 802         char filepath[PATH_MAX], entrypath[PATH_MAX];
 803         size_t count, i;
 804         int lc, r, ret;
 805
 806         count = git_tree_entrycount(tree);
 807         for (i = 0; i < count; i++) {
 808                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 809                     !(entryname = git_tree_entry_name(entry)))
 810                         return -1;
 811                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 812
 813                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 814                          entrypath);
 815                 if (r == -1 || (size_t)r >= sizeof(filepath))
 816                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 817
 818                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 819                         switch (git_object_type(obj)) {
 820                         case GIT_OBJ_BLOB:
 821                                 break;
 822                         case GIT_OBJ_TREE:
 823                                 /* NOTE: recurses */
 824                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 825                                                      entrypath);
 826                                 git_object_free(obj);
 827                                 if (ret)
 828                                         return ret;
 829                                 continue;
 830                         default:
 831                                 git_object_free(obj);
 832                                 continue;
 833                         }
 834
 835                         filesize = git_blob_rawsize((git_blob *)obj);
 836                         lc = writeblob(obj, filepath, entryname, filesize);
 837
 838                         fputs("<tr><td>", fp);
 839                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 840                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 841                         xmlencode(fp, entrypath, strlen(entrypath));
 842                         fputs("</a></td><td class=\"num\">", fp);
 843                         if (showlinecount && lc > 0)
 844                                 fprintf(fp, "%dL", lc);
 845                         else
 846                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 847                         fputs("</td></tr>\n", fp);
 848                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 849                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 850                                 relpath);
 851                         xmlencode(fp, entrypath, strlen(entrypath));
 852                         git_submodule_free(module);
 853                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 854                 }
 855         }
 856
 857         return 0;
 858 }
 859
 860 int
 861 writefiles(FILE *fp, const git_oid *id, const char *branch)
 862 {
 863         git_tree *tree = NULL;
 864         git_commit *commit = NULL;
 865         int ret = -1;
 866
 867         fputs("<table id=\"files\"><thead>\n<tr>"
 868               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 869               "</tr>\n</thead><tbody>\n", fp);
 870
 871         if (git_commit_lookup(&commit, repo, id) ||
 872             git_commit_tree(&tree, commit))
 873                 goto err;
 874         ret = writefilestree(fp, tree, branch, "");
 875
 876 err:
 877         fputs("</tbody></table>", fp);
 878
 879         git_commit_free(commit);
 880         git_tree_free(tree);
 881
 882         return ret;
 883 }
 884
 885 int
 886 refs_cmp(const void *v1, const void *v2)
 887 {
 888         git_reference *r1 = (*(git_reference **)v1);
 889         git_reference *r2 = (*(git_reference **)v2);
 890         int t1, t2;
 891
 892         t1 = git_reference_is_branch(r1);
 893         t2 = git_reference_is_branch(r2);
 894
 895         if (t1 != t2)
 896                 return t1 - t2;
 897
 898         return strcmp(git_reference_shorthand(r1),
 899                       git_reference_shorthand(r2));
 900 }
 901
 902 int
 903 writerefs(FILE *fp)
 904 {
 905         struct commitinfo *ci;
 906         const git_oid *id = NULL;
 907         git_object *obj = NULL;
 908         git_reference *dref = NULL, *r, *ref = NULL;
 909         git_reference_iterator *it = NULL;
 910         git_reference **refs = NULL;
 911         size_t count, i, j, refcount;
 912         const char *titles[] = { "Branches", "Tags" };
 913         const char *ids[] = { "branches", "tags" };
 914         const char *name;
 915
 916         if (git_reference_iterator_new(&it, repo))
 917                 return -1;
 918
 919         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 920                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 921                         err(1, "realloc");
 922                 refs[refcount] = ref;
 923         }
 924         git_reference_iterator_free(it);
 925
 926         /* sort by type then shorthand name */
 927         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 928
 929         for (j = 0; j < 2; j++) {
 930                 for (i = 0, count = 0; i < refcount; i++) {
 931                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 932                             !(git_reference_is_tag(refs[i]) && j == 1))
 933                                 continue;
 934
 935                         switch (git_reference_type(refs[i])) {
 936                         case GIT_REF_SYMBOLIC:
 937                                 if (git_reference_resolve(&dref, refs[i]))
 938                                         goto err;
 939                                 r = dref;
 940                                 break;
 941                         case GIT_REF_OID:
 942                                 r = refs[i];
 943                                 break;
 944                         default:
 945                                 continue;
 946                         }
 947                         if (!(id = git_reference_target(r)))
 948                                 goto err;
 949                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 950                                 goto err;
 951                         if (!(id = git_object_id(obj)))
 952                                 goto err;
 953                         if (!(ci = commitinfo_getbyoid(id)))
 954                                 break;
 955
 956                         /* print header if it has an entry (first). */
 957                         if (++count == 1) {
 958                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 959                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 960                                       titles[j], ids[j]);
 961                         }
 962
 963                         relpath = "";
 964                         name = git_reference_shorthand(r);
 965
 966                         fputs("<tr><td>", fp);
 967                         xmlencode(fp, name, strlen(name));
 968                         fputs("</td><td>", fp);
 969                         if (ci->author)
 970                                 printtimeshort(fp, &(ci->author->when));
 971                         fputs("</td><td>", fp);
 972                         if (ci->author)
 973                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 974                         fputs("</td></tr>\n", fp);
 975
 976                         relpath = "../";
 977
 978                         commitinfo_free(ci);
 979                         git_object_free(obj);
 980                         obj = NULL;
 981                         git_reference_free(dref);
 982                         dref = NULL;
 983                 }
 984                 /* table footer */
 985                 if (count)
 986                         fputs("</tbody></table><br/>", fp);
 987         }
 988
 989 err:
 990         git_object_free(obj);
 991         git_reference_free(dref);
 992
 993         for (i = 0; i < refcount; i++)
 994                 git_reference_free(refs[i]);
 995         free(refs);
 996
 997         return 0;
 998 }
 999
1000 void
1001 usage(char *argv0)
1002 {
1003         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
1004         exit(1);
1005 }
1006
1007 int
1008 main(int argc, char *argv[])
1009 {
1010         git_object *obj = NULL;
1011         const git_oid *head = NULL;
1012         const git_error *e = NULL;
1013         FILE *fp, *fpread;
1014         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1015         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1016         size_t n;
1017         int i, fd;
1018
1019         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1020                 err(1, "pledge");
1021
1022         for (i = 1; i < argc; i++) {
1023                 if (argv[i][0] != '-') {
1024                         if (repodir)
1025                                 usage(argv[0]);
1026                         repodir = argv[i];
1027                 } else if (argv[i][1] == 'c') {
1028                         if (i + 1 >= argc)
1029                                 usage(argv[0]);
1030                         cachefile = argv[++i];
1031                 }
1032         }
1033         if (!repodir)
1034                 usage(argv[0]);
1035
1036         if (!realpath(repodir, repodirabs))
1037                 err(1, "realpath");
1038
1039         git_libgit2_init();
1040
1041         if (git_repository_open_ext(&repo, repodir,
1042                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1043                 e = giterr_last();
1044                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1045                 return 1;
1046         }
1047
1048         /* find HEAD */
1049         if (git_revparse_single(&obj, repo, "HEAD"))
1050                 return 1;
1051         head = git_object_id(obj);
1052         git_object_free(obj);
1053
1054         /* use directory name as name */
1055         if ((name = strrchr(repodirabs, '/')))
1056                 name++;
1057         else
1058                 name = "";
1059
1060         /* strip .git suffix */
1061         if (!(strippedname = strdup(name)))
1062                 err(1, "strdup");
1063         if ((p = strrchr(strippedname, '.')))
1064                 if (!strcmp(p, ".git"))
1065                         *p = '\0';
1066
1067         /* read description or .git/description */
1068         joinpath(path, sizeof(path), repodir, "description");
1069         if (!(fpread = fopen(path, "r"))) {
1070                 joinpath(path, sizeof(path), repodir, ".git/description");
1071                 fpread = fopen(path, "r");
1072         }
1073         if (fpread) {
1074                 if (!fgets(description, sizeof(description), fpread))
1075                         description[0] = '\0';
1076                 fclose(fpread);
1077         }
1078
1079         /* read url or .git/url */
1080         joinpath(path, sizeof(path), repodir, "url");
1081         if (!(fpread = fopen(path, "r"))) {
1082                 joinpath(path, sizeof(path), repodir, ".git/url");
1083                 fpread = fopen(path, "r");
1084         }
1085         if (fpread) {
1086                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1087                         cloneurl[0] = '\0';
1088                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1089                 fclose(fpread);
1090         }
1091
1092         /* check LICENSE */
1093         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1094         git_object_free(obj);
1095         /* check README */
1096         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1097         git_object_free(obj);
1098         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
1099         git_object_free(obj);
1100
1101         /* log for HEAD */
1102         fp = efopen("log.html", "w");
1103         relpath = "";
1104         mkdir("commit", 0755);
1105         writeheader(fp, "Log");
1106         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1107                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1108                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1109
1110         if (cachefile) {
1111                 /* read from cache file (does not need to exist) */
1112                 if ((rcachefp = fopen(cachefile, "r"))) {
1113                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1114                                 errx(1, "%s: no object id", cachefile);
1115                         if (git_oid_fromstr(&lastoid, lastoidstr))
1116                                 errx(1, "%s: invalid object id", cachefile);
1117                 }
1118
1119                 /* write log to (temporary) cache */
1120                 if ((fd = mkstemp(tmppath)) == -1)
1121                         err(1, "mkstemp");
1122                 if (!(wcachefp = fdopen(fd, "w")))
1123                         err(1, "fdopen");
1124                 /* write last commit id (HEAD) */
1125                 git_oid_tostr(buf, sizeof(buf), head);
1126                 fprintf(wcachefp, "%s\n", buf);
1127
1128                 writelog(fp, head);
1129
1130                 if (rcachefp) {
1131                         /* append previous log to log.html and the new cache */
1132                         while (!feof(rcachefp)) {
1133                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1134                                 if (ferror(rcachefp))
1135                                         err(1, "fread");
1136                                 if (fwrite(buf, 1, n, fp) != n ||
1137                                     fwrite(buf, 1, n, wcachefp) != n)
1138                                         err(1, "fwrite");
1139                         }
1140                         fclose(rcachefp);
1141                 }
1142                 fclose(wcachefp);
1143         } else {
1144                 writelog(fp, head);
1145         }
1146
1147         fputs("</tbody></table>", fp);
1148         writefooter(fp);
1149         fclose(fp);
1150
1151         /* files for HEAD */
1152         fp = efopen("files.html", "w");
1153         writeheader(fp, "Files");
1154         writefiles(fp, head, "HEAD");
1155         writefooter(fp);
1156         fclose(fp);
1157
1158         /* summary page with branches and tags */
1159         fp = efopen("refs.html", "w");
1160         writeheader(fp, "Refs");
1161         writerefs(fp);
1162         writefooter(fp);
1163         fclose(fp);
1164
1165         /* Atom feed */
1166         fp = efopen("atom.xml", "w");
1167         writeatom(fp);
1168         fclose(fp);
1169
1170         /* rename new cache file on success */
1171         if (cachefile && rename(tmppath, cachefile))
1172                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1173
1174         /* cleanup */
1175         git_repository_free(repo);
1176         git_libgit2_shutdown();
1177
1178         return 0;
1179 }