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 deltainfo_free(struct deltainfo *di)
  81 {
  82         if (!di)
  83                 return;
  84         git_patch_free(di->patch);
  85         di->patch = NULL;
  86         free(di);
  87 }
  88
  89 int
  90 commitinfo_getstats(struct commitinfo *ci)
  91 {
  92         struct deltainfo *di;
  93         const git_diff_delta *delta;
  94         const git_diff_hunk *hunk;
  95         const git_diff_line *line;
  96         git_patch *patch = NULL;
  97         size_t ndeltas, nhunks, nhunklines;
  98         size_t i, j, k;
  99
 100         ndeltas = git_diff_num_deltas(ci->diff);
 101         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 102                 err(1, "calloc");
 103
 104         for (i = 0; i < ndeltas; i++) {
 105                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 106                         err(1, "calloc");
 107                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 108                         git_patch_free(patch);
 109                         goto err;
 110                 }
 111                 di->patch = patch;
 112                 ci->deltas[i] = di;
 113
 114                 delta = git_patch_get_delta(patch);
 115
 116                 /* check binary data */
 117                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 118                         continue;
 119
 120                 nhunks = git_patch_num_hunks(patch);
 121                 for (j = 0; j < nhunks; j++) {
 122                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 123                                 break;
 124                         for (k = 0; ; k++) {
 125                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 126                                         break;
 127                                 if (line->old_lineno == -1) {
 128                                         di->addcount++;
 129                                         ci->addcount++;
 130                                 } else if (line->new_lineno == -1) {
 131                                         di->delcount++;
 132                                         ci->delcount++;
 133                                 }
 134                         }
 135                 }
 136         }
 137         ci->ndeltas = i;
 138         ci->filecount = i;
 139
 140         return 0;
 141
 142 err:
 143         if (ci->deltas)
 144                 for (i = 0; i < ci->ndeltas; i++)
 145                         deltainfo_free(ci->deltas[i]);
 146         free(ci->deltas);
 147         ci->deltas = NULL;
 148         ci->ndeltas = 0;
 149         ci->addcount = 0;
 150         ci->delcount = 0;
 151         ci->filecount = 0;
 152
 153         return -1;
 154 }
 155
 156 void
 157 commitinfo_free(struct commitinfo *ci)
 158 {
 159         size_t i;
 160
 161         if (!ci)
 162                 return;
 163         if (ci->deltas)
 164                 for (i = 0; i < ci->ndeltas; i++)
 165                         deltainfo_free(ci->deltas[i]);
 166         free(ci->deltas);
 167         ci->deltas = NULL;
 168         git_diff_free(ci->diff);
 169         git_tree_free(ci->commit_tree);
 170         git_tree_free(ci->parent_tree);
 171         git_commit_free(ci->commit);
 172 }
 173
 174 struct commitinfo *
 175 commitinfo_getbyoid(const git_oid *id)
 176 {
 177         struct commitinfo *ci;
 178         git_diff_options opts;
 179
 180         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 181                 err(1, "calloc");
 182
 183         if (git_commit_lookup(&(ci->commit), repo, id))
 184                 goto err;
 185         ci->id = id;
 186
 187         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 188         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 189
 190         ci->author = git_commit_author(ci->commit);
 191         ci->committer = git_commit_committer(ci->commit);
 192         ci->summary = git_commit_summary(ci->commit);
 193         ci->msg = git_commit_message(ci->commit);
 194
 195         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 196                 goto err;
 197         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 198                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 199                         ci->parent = NULL;
 200                         ci->parent_tree = NULL;
 201                 }
 202         }
 203
 204         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 205         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 206         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 207                 goto err;
 208         if (commitinfo_getstats(ci) == -1)
 209                 goto err;
 210
 211         return ci;
 212
 213 err:
 214         commitinfo_free(ci);
 215         free(ci);
 216
 217         return NULL;
 218 }
 219
 220 FILE *
 221 efopen(const char *name, const char *flags)
 222 {
 223         FILE *fp;
 224
 225         if (!(fp = fopen(name, flags)))
 226                 err(1, "fopen");
 227
 228         return fp;
 229 }
 230
 231 /* Escape characters below as HTML 2.0 / XML 1.0. */
 232 void
 233 xmlencode(FILE *fp, const char *s, size_t len)
 234 {
 235         size_t i;
 236
 237         for (i = 0; *s && i < len; s++, i++) {
 238                 switch(*s) {
 239                 case '<':  fputs("&lt;",   fp); break;
 240                 case '>':  fputs("&gt;",   fp); break;
 241                 case '\'': fputs("&apos;", fp); break;
 242                 case '&':  fputs("&amp;",  fp); break;
 243                 case '"':  fputs("&quot;", fp); break;
 244                 default:   fputc(*s, fp);
 245                 }
 246         }
 247 }
 248
 249 int
 250 mkdirp(const char *path)
 251 {
 252         char tmp[PATH_MAX], *p;
 253
 254         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 255                 errx(1, "path truncated: '%s'", path);
 256         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 257                 if (*p != '/')
 258                         continue;
 259                 *p = '\0';
 260                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 261                         return -1;
 262                 *p = '/';
 263         }
 264         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 265                 return -1;
 266         return 0;
 267 }
 268
 269 void
 270 printtimez(FILE *fp, const git_time *intime)
 271 {
 272         struct tm *intm;
 273         time_t t;
 274         char out[32];
 275
 276         t = (time_t)intime->time;
 277         if (!(intm = gmtime(&t)))
 278                 return;
 279         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 280         fputs(out, fp);
 281 }
 282
 283 void
 284 printtime(FILE *fp, const git_time *intime)
 285 {
 286         struct tm *intm;
 287         time_t t;
 288         int offset, sign = '+';
 289         char out[32];
 290
 291         offset = intime->offset * 60;
 292         t = (time_t)intime->time + offset;
 293         if (!(intm = gmtime(&t)))
 294                 return;
 295         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 296         if (offset < 0) {
 297                 offset = -offset;
 298                 sign = '-';
 299         }
 300         fprintf(fp, "%s %c%02d%02d", out, sign, offset / 60, offset % 60);
 301 }
 302
 303 void
 304 printtimeshort(FILE *fp, const git_time *intime)
 305 {
 306         struct tm *intm;
 307         time_t t;
 308         char out[32];
 309
 310         t = (time_t)intime->time;
 311         if (!(intm = gmtime(&t)))
 312                 return;
 313         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 314         fputs(out, fp);
 315 }
 316
 317 void
 318 writeheader(FILE *fp, const char *title)
 319 {
 320         fputs("<!DOCTYPE html>\n"
 321                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 322                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 323                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 324         xmlencode(fp, title, strlen(title));
 325         if (title[0] && strippedname[0])
 326                 fputs(" - ", fp);
 327         xmlencode(fp, strippedname, strlen(strippedname));
 328         if (description[0])
 329                 fputs(" - ", fp);
 330         xmlencode(fp, description, strlen(description));
 331         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 332         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 333                 name, relpath);
 334         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 335         fputs("</head>\n<body>\n<table><tr><td>", fp);
 336         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 337                 relpath, relpath);
 338         fputs("</td><td><h1>", fp);
 339         xmlencode(fp, strippedname, strlen(strippedname));
 340         fputs("</h1><span class=\"desc\">", fp);
 341         xmlencode(fp, description, strlen(description));
 342         fputs("</span></td></tr>", fp);
 343         if (cloneurl[0]) {
 344                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 345                 xmlencode(fp, cloneurl, strlen(cloneurl));
 346                 fputs("\">", fp);
 347                 xmlencode(fp, cloneurl, strlen(cloneurl));
 348                 fputs("</a></td></tr>", fp);
 349         }
 350         fputs("<tr><td></td><td>\n", fp);
 351         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 352         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 353         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 354         if (hassubmodules)
 355                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 356         if (hasreadme)
 357                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 358         if (haslicense)
 359                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 360         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 361 }
 362
 363 void
 364 writefooter(FILE *fp)
 365 {
 366         fputs("</div>\n</body>\n</html>\n", fp);
 367 }
 368
 369 int
 370 writeblobhtml(FILE *fp, const git_blob *blob)
 371 {
 372         off_t i;
 373         size_t n = 0;
 374         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 375         const char *s = git_blob_rawcontent(blob);
 376         git_off_t len = git_blob_rawsize(blob);
 377
 378         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 379
 380         if (len) {
 381                 n++;
 382                 fprintf(fp, nfmt, n, n, n);
 383                 for (i = 0; i < len - 1; i++) {
 384                         if (s[i] == '\n') {
 385                                 n++;
 386                                 fprintf(fp, nfmt, n, n, n);
 387                         }
 388                 }
 389         }
 390
 391         fputs("</pre></td><td><pre>\n", fp);
 392         xmlencode(fp, s, (size_t)len);
 393         fputs("</pre></td></tr></table>\n", fp);
 394
 395         return n;
 396 }
 397
 398 void
 399 printcommit(FILE *fp, struct commitinfo *ci)
 400 {
 401         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 402                 relpath, ci->oid, ci->oid);
 403
 404         if (ci->parentoid[0])
 405                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 406                         relpath, ci->parentoid, ci->parentoid);
 407
 408         if (ci->author) {
 409                 fputs("<b>Author:</b> ", fp);
 410                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 411                 fputs(" &lt;<a href=\"mailto:", fp);
 412                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 413                 fputs("\">", fp);
 414                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 415                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 416                 printtime(fp, &(ci->author->when));
 417                 fputc('\n', fp);
 418         }
 419         if (ci->msg) {
 420                 fputc('\n', fp);
 421                 xmlencode(fp, ci->msg, strlen(ci->msg));
 422                 fputc('\n', fp);
 423         }
 424 }
 425
 426 void
 427 printshowfile(FILE *fp, struct commitinfo *ci)
 428 {
 429         const git_diff_delta *delta;
 430         const git_diff_hunk *hunk;
 431         const git_diff_line *line;
 432         git_patch *patch;
 433         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 434         char linestr[80];
 435
 436         printcommit(fp, ci);
 437
 438         if (!ci->deltas)
 439                 return;
 440
 441         if (ci->filecount > 1000   ||
 442             ci->ndeltas   > 1000   ||
 443             ci->addcount  > 100000 ||
 444             ci->delcount  > 100000) {
 445                 fprintf(fp, "(diff is too large, output suppressed)");
 446                 return;
 447         }
 448
 449         /* diff stat */
 450         fputs("<b>Diffstat:</b>\n<table>", fp);
 451         for (i = 0; i < ci->ndeltas; i++) {
 452                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 453                 fputs("<tr><td>", fp);
 454                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 455                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 456                         fputs(" -&gt; ", fp);
 457                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 458                 }
 459
 460                 add = ci->deltas[i]->addcount;
 461                 del = ci->deltas[i]->delcount;
 462                 changed = add + del;
 463                 total = sizeof(linestr) - 2;
 464                 if (changed > total) {
 465                         if (add)
 466                                 add = ((float)total / changed * add) + 1;
 467                         if (del)
 468                                 del = ((float)total / changed * del) + 1;
 469                 }
 470                 memset(&linestr, '+', add);
 471                 memset(&linestr[add], '-', del);
 472
 473                 fprintf(fp, "</td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 474                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 475                 fwrite(&linestr, 1, add, fp);
 476                 fputs("</span><span class=\"d\">", fp);
 477                 fwrite(&linestr[add], 1, del, fp);
 478                 fputs("</span></td></tr>\n", fp);
 479         }
 480         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 481                 ci->filecount, ci->filecount == 1 ? "" : "s",
 482                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 483                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 484
 485         fputs("<hr/>", fp);
 486
 487         for (i = 0; i < ci->ndeltas; i++) {
 488                 patch = ci->deltas[i]->patch;
 489                 delta = git_patch_get_delta(patch);
 490                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 491                         relpath, delta->old_file.path, delta->old_file.path,
 492                         relpath, delta->new_file.path, delta->new_file.path);
 493
 494                 /* check binary data */
 495                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 496                         fputs("Binary files differ\n", fp);
 497                         continue;
 498                 }
 499
 500                 nhunks = git_patch_num_hunks(patch);
 501                 for (j = 0; j < nhunks; j++) {
 502                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 503                                 break;
 504
 505                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 506                         xmlencode(fp, hunk->header, hunk->header_len);
 507                         fputs("</a>", fp);
 508
 509                         for (k = 0; ; k++) {
 510                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 511                                         break;
 512                                 if (line->old_lineno == -1)
 513                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 514                                                 i, j, k, i, j, k);
 515                                 else if (line->new_lineno == -1)
 516                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 517                                                 i, j, k, i, j, k);
 518                                 else
 519                                         fputc(' ', fp);
 520                                 xmlencode(fp, line->content, line->content_len);
 521                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 522                                         fputs("</a>", fp);
 523                         }
 524                 }
 525         }
 526 }
 527
 528 void
 529 writelogline(FILE *fp, struct commitinfo *ci)
 530 {
 531         size_t len;
 532
 533         fputs("<tr><td>", fp);
 534         if (ci->author)
 535                 printtimeshort(fp, &(ci->author->when));
 536         fputs("</td><td>", fp);
 537         if (ci->summary) {
 538                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 539                 if ((len = strlen(ci->summary)) > summarylen) {
 540                         xmlencode(fp, ci->summary, summarylen - 1);
 541                         fputs("…", fp);
 542                 } else {
 543                         xmlencode(fp, ci->summary, len);
 544                 }
 545                 fputs("</a>", fp);
 546         }
 547         fputs("</td><td>", fp);
 548         if (ci->author)
 549                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 550         fputs("</td><td class=\"num\">", fp);
 551         fprintf(fp, "%zu", ci->filecount);
 552         fputs("</td><td class=\"num\">", fp);
 553         fprintf(fp, "+%zu", ci->addcount);
 554         fputs("</td><td class=\"num\">", fp);
 555         fprintf(fp, "-%zu", ci->delcount);
 556         fputs("</td></tr>\n", fp);
 557 }
 558
 559 int
 560 writelog(FILE *fp, const git_oid *oid)
 561 {
 562         struct commitinfo *ci;
 563         git_revwalk *w = NULL;
 564         git_oid id;
 565         char path[PATH_MAX];
 566         FILE *fpfile;
 567         int r;
 568
 569         git_revwalk_new(&w, repo);
 570         git_revwalk_push(w, oid);
 571         git_revwalk_sorting(w, GIT_SORT_TIME);
 572         git_revwalk_simplify_first_parent(w);
 573
 574         while (!git_revwalk_next(&id, w)) {
 575                 relpath = "";
 576
 577                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 578                         break;
 579                 if (!(ci = commitinfo_getbyoid(&id)))
 580                         break;
 581
 582                 writelogline(fp, ci);
 583                 if (cachefile)
 584                         writelogline(wcachefp, ci);
 585
 586                 relpath = "../";
 587
 588                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 589                 if (r == -1 || (size_t)r >= sizeof(path))
 590                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 591
 592                 /* check if file exists if so skip it */
 593                 if (access(path, F_OK)) {
 594                         fpfile = efopen(path, "w");
 595                         writeheader(fpfile, ci->summary);
 596                         fputs("<pre>", fpfile);
 597                         printshowfile(fpfile, ci);
 598                         fputs("</pre>\n", fpfile);
 599                         writefooter(fpfile);
 600                         fclose(fpfile);
 601                 }
 602                 commitinfo_free(ci);
 603         }
 604         git_revwalk_free(w);
 605
 606         relpath = "";
 607
 608         return 0;
 609 }
 610
 611 void
 612 printcommitatom(FILE *fp, struct commitinfo *ci)
 613 {
 614         fputs("<entry>\n", fp);
 615
 616         fprintf(fp, "<id>%s</id>\n", ci->oid);
 617         if (ci->author) {
 618                 fputs("<published>", fp);
 619                 printtimez(fp, &(ci->author->when));
 620                 fputs("</published>\n", fp);
 621         }
 622         if (ci->committer) {
 623                 fputs("<updated>", fp);
 624                 printtimez(fp, &(ci->committer->when));
 625                 fputs("</updated>\n", fp);
 626         }
 627         if (ci->summary) {
 628                 fputs("<title type=\"text\">", fp);
 629                 xmlencode(fp, ci->summary, strlen(ci->summary));
 630                 fputs("</title>\n", fp);
 631         }
 632         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 633                 ci->oid);
 634
 635         if (ci->author) {
 636                 fputs("<author><name>", fp);
 637                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 638                 fputs("</name>\n<email>", fp);
 639                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 640                 fputs("</email>\n</author>\n", fp);
 641         }
 642
 643         fputs("<content type=\"text\">", fp);
 644         fprintf(fp, "commit %s\n", ci->oid);
 645         if (ci->parentoid[0])
 646                 fprintf(fp, "parent %s\n", ci->parentoid);
 647         if (ci->author) {
 648                 fputs("Author: ", fp);
 649                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 650                 fputs(" &lt;", fp);
 651                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 652                 fputs("&gt;\nDate:   ", fp);
 653                 printtime(fp, &(ci->author->when));
 654                 fputc('\n', fp);
 655         }
 656         if (ci->msg) {
 657                 fputc('\n', fp);
 658                 xmlencode(fp, ci->msg, strlen(ci->msg));
 659         }
 660         fputs("\n</content>\n</entry>\n", fp);
 661 }
 662
 663 int
 664 writeatom(FILE *fp)
 665 {
 666         struct commitinfo *ci;
 667         git_revwalk *w = NULL;
 668         git_oid id;
 669         size_t i, m = 100; /* last 'm' commits */
 670
 671         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 672               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 673         xmlencode(fp, strippedname, strlen(strippedname));
 674         fputs(", branch HEAD</title>\n<subtitle>", fp);
 675         xmlencode(fp, description, strlen(description));
 676         fputs("</subtitle>\n", fp);
 677
 678         git_revwalk_new(&w, repo);
 679         git_revwalk_push_head(w);
 680         git_revwalk_sorting(w, GIT_SORT_TIME);
 681         git_revwalk_simplify_first_parent(w);
 682
 683         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 684                 if (!(ci = commitinfo_getbyoid(&id)))
 685                         break;
 686                 printcommitatom(fp, ci);
 687                 commitinfo_free(ci);
 688         }
 689         git_revwalk_free(w);
 690
 691         fputs("</feed>", fp);
 692
 693         return 0;
 694 }
 695
 696 int
 697 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 698 {
 699         char tmp[PATH_MAX] = "", *d;
 700         const char *p;
 701         int lc = 0;
 702         FILE *fp;
 703
 704         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 705                 errx(1, "path truncated: '%s'", fpath);
 706         if (!(d = dirname(tmp)))
 707                 err(1, "dirname");
 708         if (mkdirp(d))
 709                 return -1;
 710
 711         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 712                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 713                         errx(1, "path truncated: '../%s'", tmp);
 714                 p++;
 715         }
 716         relpath = tmp;
 717
 718         fp = efopen(fpath, "w");
 719         writeheader(fp, filename);
 720         fputs("<p> ", fp);
 721         xmlencode(fp, filename, strlen(filename));
 722         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 723         fputs("</p><hr/>", fp);
 724
 725         if (git_blob_is_binary((git_blob *)obj)) {
 726                 fputs("<p>Binary file</p>\n", fp);
 727         } else {
 728                 lc = writeblobhtml(fp, (git_blob *)obj);
 729                 if (ferror(fp))
 730                         err(1, "fwrite");
 731         }
 732         writefooter(fp);
 733         fclose(fp);
 734
 735         relpath = "";
 736
 737         return lc;
 738 }
 739
 740 const char *
 741 filemode(git_filemode_t m)
 742 {
 743         static char mode[11];
 744
 745         memset(mode, '-', sizeof(mode) - 1);
 746         mode[10] = '\0';
 747
 748         if (S_ISREG(m))
 749                 mode[0] = '-';
 750         else if (S_ISBLK(m))
 751                 mode[0] = 'b';
 752         else if (S_ISCHR(m))
 753                 mode[0] = 'c';
 754         else if (S_ISDIR(m))
 755                 mode[0] = 'd';
 756         else if (S_ISFIFO(m))
 757                 mode[0] = 'p';
 758         else if (S_ISLNK(m))
 759                 mode[0] = 'l';
 760         else if (S_ISSOCK(m))
 761                 mode[0] = 's';
 762         else
 763                 mode[0] = '?';
 764
 765         if (m & S_IRUSR) mode[1] = 'r';
 766         if (m & S_IWUSR) mode[2] = 'w';
 767         if (m & S_IXUSR) mode[3] = 'x';
 768         if (m & S_IRGRP) mode[4] = 'r';
 769         if (m & S_IWGRP) mode[5] = 'w';
 770         if (m & S_IXGRP) mode[6] = 'x';
 771         if (m & S_IROTH) mode[7] = 'r';
 772         if (m & S_IWOTH) mode[8] = 'w';
 773         if (m & S_IXOTH) mode[9] = 'x';
 774
 775         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 776         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 777         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 778
 779         return mode;
 780 }
 781
 782 int
 783 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 784 {
 785         const git_tree_entry *entry = NULL;
 786         git_submodule *module = NULL;
 787         git_object *obj = NULL;
 788         git_off_t filesize;
 789         const char *entryname;
 790         char filepath[PATH_MAX], entrypath[PATH_MAX];
 791         size_t count, i;
 792         int lc, r, ret;
 793
 794         count = git_tree_entrycount(tree);
 795         for (i = 0; i < count; i++) {
 796                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 797                     !(entryname = git_tree_entry_name(entry)))
 798                         return -1;
 799                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 800                          path, path[0] ? "/" : "", entryname);
 801                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 802                         errx(1, "path truncated: '%s%s%s'",
 803                                 path, path[0] ? "/" : "", entryname);
 804
 805                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 806                          path, path[0] ? "/" : "", entryname);
 807                 if (r == -1 || (size_t)r >= sizeof(filepath))
 808                         errx(1, "path truncated: 'file/%s%s%s.html'",
 809                                 path, path[0] ? "/" : "", entryname);
 810
 811                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 812                         switch (git_object_type(obj)) {
 813                         case GIT_OBJ_BLOB:
 814                                 break;
 815                         case GIT_OBJ_TREE:
 816                                 /* NOTE: recurses */
 817                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 818                                                      entrypath);
 819                                 git_object_free(obj);
 820                                 if (ret)
 821                                         return ret;
 822                                 continue;
 823                         default:
 824                                 git_object_free(obj);
 825                                 continue;
 826                         }
 827
 828                         filesize = git_blob_rawsize((git_blob *)obj);
 829                         lc = writeblob(obj, filepath, entryname, filesize);
 830
 831                         fputs("<tr><td>", fp);
 832                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 833                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 834                         xmlencode(fp, entrypath, strlen(entrypath));
 835                         fputs("</a></td><td class=\"num\">", fp);
 836                         if (showlinecount && lc > 0)
 837                                 fprintf(fp, "%dL", lc);
 838                         else
 839                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 840                         fputs("</td></tr>\n", fp);
 841                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 842                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 843                                 relpath);
 844                         xmlencode(fp, entrypath, strlen(entrypath));
 845                         git_submodule_free(module);
 846                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 847                 }
 848         }
 849
 850         return 0;
 851 }
 852
 853 int
 854 writefiles(FILE *fp, const git_oid *id, const char *branch)
 855 {
 856         git_tree *tree = NULL;
 857         git_commit *commit = NULL;
 858         int ret = -1;
 859
 860         fputs("<table id=\"files\"><thead>\n<tr>"
 861               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 862               "</tr>\n</thead><tbody>\n", fp);
 863
 864         if (git_commit_lookup(&commit, repo, id) ||
 865             git_commit_tree(&tree, commit))
 866                 goto err;
 867         ret = writefilestree(fp, tree, branch, "");
 868
 869 err:
 870         fputs("</tbody></table>", fp);
 871
 872         git_commit_free(commit);
 873         git_tree_free(tree);
 874
 875         return ret;
 876 }
 877
 878 int
 879 refs_cmp(const void *v1, const void *v2)
 880 {
 881         git_reference *r1 = (*(git_reference **)v1);
 882         git_reference *r2 = (*(git_reference **)v2);
 883         int t1, t2;
 884
 885         t1 = git_reference_is_branch(r1);
 886         t2 = git_reference_is_branch(r2);
 887
 888         if (t1 != t2)
 889                 return t1 - t2;
 890
 891         return strcmp(git_reference_shorthand(r1),
 892                       git_reference_shorthand(r2));
 893 }
 894
 895 int
 896 writerefs(FILE *fp)
 897 {
 898         struct commitinfo *ci;
 899         const git_oid *id = NULL;
 900         git_object *obj = NULL;
 901         git_reference *dref = NULL, *r, *ref = NULL;
 902         git_reference_iterator *it = NULL;
 903         git_reference **refs = NULL;
 904         size_t count, i, j, refcount;
 905         const char *titles[] = { "Branches", "Tags" };
 906         const char *ids[] = { "branches", "tags" };
 907         const char *name;
 908
 909         if (git_reference_iterator_new(&it, repo))
 910                 return -1;
 911
 912         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 913                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 914                         err(1, "realloc");
 915                 refs[refcount] = ref;
 916         }
 917         git_reference_iterator_free(it);
 918
 919         /* sort by type then shorthand name */
 920         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 921
 922         for (j = 0; j < 2; j++) {
 923                 for (i = 0, count = 0; i < refcount; i++) {
 924                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 925                             !(git_reference_is_tag(refs[i]) && j == 1))
 926                                 continue;
 927
 928                         switch (git_reference_type(refs[i])) {
 929                         case GIT_REF_SYMBOLIC:
 930                                 if (git_reference_resolve(&dref, refs[i]))
 931                                         goto err;
 932                                 r = dref;
 933                                 break;
 934                         case GIT_REF_OID:
 935                                 r = refs[i];
 936                                 break;
 937                         default:
 938                                 continue;
 939                         }
 940                         if (!(id = git_reference_target(r)))
 941                                 goto err;
 942                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 943                                 goto err;
 944                         if (!(id = git_object_id(obj)))
 945                                 goto err;
 946                         if (!(ci = commitinfo_getbyoid(id)))
 947                                 break;
 948
 949                         /* print header if it has an entry (first). */
 950                         if (++count == 1) {
 951                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 952                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 953                                       titles[j], ids[j]);
 954                         }
 955
 956                         relpath = "";
 957                         name = git_reference_shorthand(r);
 958
 959                         fputs("<tr><td>", fp);
 960                         xmlencode(fp, name, strlen(name));
 961                         fputs("</td><td>", fp);
 962                         if (ci->author)
 963                                 printtimeshort(fp, &(ci->author->when));
 964                         fputs("</td><td>", fp);
 965                         if (ci->author)
 966                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 967                         fputs("</td></tr>\n", fp);
 968
 969                         relpath = "../";
 970
 971                         commitinfo_free(ci);
 972                         git_object_free(obj);
 973                         obj = NULL;
 974                         git_reference_free(dref);
 975                         dref = NULL;
 976                 }
 977                 /* table footer */
 978                 if (count)
 979                         fputs("</tbody></table><br/>", fp);
 980         }
 981
 982 err:
 983         git_object_free(obj);
 984         git_reference_free(dref);
 985
 986         for (i = 0; i < refcount; i++)
 987                 git_reference_free(refs[i]);
 988         free(refs);
 989
 990         return 0;
 991 }
 992
 993 void
 994 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
 995 {
 996         int r;
 997
 998         r = snprintf(buf, bufsiz, "%s%s%s",
 999                 repodir, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
1000         if (r == -1 || (size_t)r >= bufsiz)
1001                 errx(1, "path truncated: '%s%s%s'",
1002                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
1003 }
1004
1005 void
1006 usage(char *argv0)
1007 {
1008         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
1009         exit(1);
1010 }
1011
1012 int
1013 main(int argc, char *argv[])
1014 {
1015         git_object *obj = NULL;
1016         const git_oid *head = NULL;
1017         const git_error *e = NULL;
1018         FILE *fp, *fpread;
1019         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1020         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1021         size_t n;
1022         int i, fd;
1023
1024         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1025                 err(1, "pledge");
1026
1027         for (i = 1; i < argc; i++) {
1028                 if (argv[i][0] != '-') {
1029                         if (repodir)
1030                                 usage(argv[0]);
1031                         repodir = argv[i];
1032                 } else if (argv[i][1] == 'c') {
1033                         if (i + 1 >= argc)
1034                                 usage(argv[0]);
1035                         cachefile = argv[++i];
1036                 }
1037         }
1038         if (!repodir)
1039                 usage(argv[0]);
1040
1041         if (!realpath(repodir, repodirabs))
1042                 err(1, "realpath");
1043
1044         git_libgit2_init();
1045
1046         if (git_repository_open_ext(&repo, repodir,
1047                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1048                 e = giterr_last();
1049                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1050                 return 1;
1051         }
1052
1053         /* find HEAD */
1054         if (git_revparse_single(&obj, repo, "HEAD"))
1055                 return 1;
1056         head = git_object_id(obj);
1057         git_object_free(obj);
1058
1059         /* use directory name as name */
1060         if ((name = strrchr(repodirabs, '/')))
1061                 name++;
1062         else
1063                 name = "";
1064
1065         /* strip .git suffix */
1066         if (!(strippedname = strdup(name)))
1067                 err(1, "strdup");
1068         if ((p = strrchr(strippedname, '.')))
1069                 if (!strcmp(p, ".git"))
1070                         *p = '\0';
1071
1072         /* read description or .git/description */
1073         joinpath(path, sizeof(path), repodir, "description");
1074         if (!(fpread = fopen(path, "r"))) {
1075                 joinpath(path, sizeof(path), repodir, ".git/description");
1076                 fpread = fopen(path, "r");
1077         }
1078         if (fpread) {
1079                 if (!fgets(description, sizeof(description), fpread))
1080                         description[0] = '\0';
1081                 fclose(fpread);
1082         }
1083
1084         /* read url or .git/url */
1085         joinpath(path, sizeof(path), repodir, "url");
1086         if (!(fpread = fopen(path, "r"))) {
1087                 joinpath(path, sizeof(path), repodir, ".git/url");
1088                 fpread = fopen(path, "r");
1089         }
1090         if (fpread) {
1091                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1092                         cloneurl[0] = '\0';
1093                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1094                 fclose(fpread);
1095         }
1096
1097         /* check LICENSE */
1098         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1099         git_object_free(obj);
1100         /* check README */
1101         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1102         git_object_free(obj);
1103         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
1104         git_object_free(obj);
1105
1106         /* log for HEAD */
1107         fp = efopen("log.html", "w");
1108         relpath = "";
1109         mkdir("commit", 0755);
1110         writeheader(fp, "Log");
1111         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1112                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1113                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1114
1115         if (cachefile) {
1116                 /* read from cache file (does not need to exist) */
1117                 if ((rcachefp = fopen(cachefile, "r"))) {
1118                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1119                                 errx(1, "%s: no object id", cachefile);
1120                         if (git_oid_fromstr(&lastoid, lastoidstr))
1121                                 errx(1, "%s: invalid object id", cachefile);
1122                 }
1123
1124                 /* write log to (temporary) cache */
1125                 if ((fd = mkstemp(tmppath)) == -1)
1126                         err(1, "mkstemp");
1127                 if (!(wcachefp = fdopen(fd, "w")))
1128                         err(1, "fdopen");
1129                 /* write last commit id (HEAD) */
1130                 git_oid_tostr(buf, sizeof(buf), head);
1131                 fprintf(wcachefp, "%s\n", buf);
1132
1133                 writelog(fp, head);
1134
1135                 if (rcachefp) {
1136                         /* append previous log to log.html and the new cache */
1137                         while (!feof(rcachefp)) {
1138                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1139                                 if (ferror(rcachefp))
1140                                         err(1, "fread");
1141                                 if (fwrite(buf, 1, n, fp) != n ||
1142                                     fwrite(buf, 1, n, wcachefp) != n)
1143                                         err(1, "fwrite");
1144                         }
1145                         fclose(rcachefp);
1146                 }
1147                 fclose(wcachefp);
1148         } else {
1149                 writelog(fp, head);
1150         }
1151
1152         fputs("</tbody></table>", fp);
1153         writefooter(fp);
1154         fclose(fp);
1155
1156         /* files for HEAD */
1157         fp = efopen("files.html", "w");
1158         writeheader(fp, "Files");
1159         writefiles(fp, head, "HEAD");
1160         writefooter(fp);
1161         fclose(fp);
1162
1163         /* summary page with branches and tags */
1164         fp = efopen("refs.html", "w");
1165         writeheader(fp, "Refs");
1166         writerefs(fp);
1167         writefooter(fp);
1168         fclose(fp);
1169
1170         /* Atom feed */
1171         fp = efopen("atom.xml", "w");
1172         writeatom(fp);
1173         fclose(fp);
1174
1175         /* rename new cache file on success */
1176         if (cachefile && rename(tmppath, cachefile))
1177                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1178
1179         /* cleanup */
1180         git_repository_free(repo);
1181         git_libgit2_shutdown();
1182
1183         return 0;
1184 }