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 *stripped_name;
  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 /* Some implementations of dirname(3) return a pointer to a static
 250  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 251  * This is a wrapper function that is compatible with both versions.
 252  * The program will error out if dirname(3) failed, this can only happen
 253  * with the OpenBSD version. */
 254 char *
 255 xdirname(const char *path)
 256 {
 257         char *p, *b;
 258
 259         if (!(p = strdup(path)))
 260                 err(1, "strdup");
 261         if (!(b = dirname(p)))
 262                 err(1, "dirname");
 263         if (!(b = strdup(b)))
 264                 err(1, "strdup");
 265         free(p);
 266
 267         return b;
 268 }
 269
 270 int
 271 mkdirp(const char *path)
 272 {
 273         char tmp[PATH_MAX], *p;
 274
 275         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 276                 errx(1, "path truncated: '%s'", path);
 277         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 278                 if (*p != '/')
 279                         continue;
 280                 *p = '\0';
 281                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 282                         return -1;
 283                 *p = '/';
 284         }
 285         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 286                 return -1;
 287         return 0;
 288 }
 289
 290 void
 291 printtimez(FILE *fp, const git_time *intime)
 292 {
 293         struct tm *intm;
 294         time_t t;
 295         char out[32];
 296
 297         t = (time_t)intime->time;
 298         if (!(intm = gmtime(&t)))
 299                 return;
 300         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 301         fputs(out, fp);
 302 }
 303
 304 void
 305 printtime(FILE *fp, const git_time *intime)
 306 {
 307         struct tm *intm;
 308         time_t t;
 309         int offset, sign = '+';
 310         char out[32];
 311
 312         offset = intime->offset * 60;
 313         t = (time_t)intime->time + offset;
 314         if (!(intm = gmtime(&t)))
 315                 return;
 316         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 317         if (offset < 0) {
 318                 offset = -offset;
 319                 sign = '-';
 320         }
 321         fprintf(fp, "%s %c%02d%02d", out, sign, offset / 60, offset % 60);
 322 }
 323
 324 void
 325 printtimeshort(FILE *fp, const git_time *intime)
 326 {
 327         struct tm *intm;
 328         time_t t;
 329         char out[32];
 330
 331         t = (time_t)intime->time;
 332         if (!(intm = gmtime(&t)))
 333                 return;
 334         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 335         fputs(out, fp);
 336 }
 337
 338 int
 339 writeheader(FILE *fp, const char *title)
 340 {
 341         fputs("<!DOCTYPE html>\n"
 342                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 343                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 344                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 345         xmlencode(fp, title, strlen(title));
 346         if (title[0] && stripped_name[0])
 347                 fputs(" - ", fp);
 348         xmlencode(fp, stripped_name, strlen(stripped_name));
 349         if (description[0])
 350                 fputs(" - ", fp);
 351         xmlencode(fp, description, strlen(description));
 352         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 353         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 354                 name, relpath);
 355         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 356         fputs("</head>\n<body>\n<table><tr><td>", fp);
 357         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 358                 relpath, relpath);
 359         fputs("</td><td><h1>", fp);
 360         xmlencode(fp, stripped_name, strlen(stripped_name));
 361         fputs("</h1><span class=\"desc\">", fp);
 362         xmlencode(fp, description, strlen(description));
 363         fputs("</span></td></tr>", fp);
 364         if (cloneurl[0]) {
 365                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 366                 xmlencode(fp, cloneurl, strlen(cloneurl));
 367                 fputs("\">", fp);
 368                 xmlencode(fp, cloneurl, strlen(cloneurl));
 369                 fputs("</a></td></tr>", fp);
 370         }
 371         fputs("<tr><td></td><td>\n", fp);
 372         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 373         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 374         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 375         if (hassubmodules)
 376                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 377         if (hasreadme)
 378                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 379         if (haslicense)
 380                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 381         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 382
 383         return 0;
 384 }
 385
 386 int
 387 writefooter(FILE *fp)
 388 {
 389         return !fputs("</div>\n</body>\n</html>\n", fp);
 390 }
 391
 392 int
 393 writeblobhtml(FILE *fp, const git_blob *blob)
 394 {
 395         off_t i;
 396         size_t n = 0;
 397         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 398         const char *s = git_blob_rawcontent(blob);
 399         git_off_t len = git_blob_rawsize(blob);
 400
 401         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 402
 403         if (len) {
 404                 n++;
 405                 fprintf(fp, nfmt, n, n, n);
 406                 for (i = 0; i < len - 1; i++) {
 407                         if (s[i] == '\n') {
 408                                 n++;
 409                                 fprintf(fp, nfmt, n, n, n);
 410                         }
 411                 }
 412         }
 413
 414         fputs("</pre></td><td><pre>\n", fp);
 415         xmlencode(fp, s, (size_t)len);
 416         fputs("</pre></td></tr></table>\n", fp);
 417
 418         return n;
 419 }
 420
 421 void
 422 printcommit(FILE *fp, struct commitinfo *ci)
 423 {
 424         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 425                 relpath, ci->oid, ci->oid);
 426
 427         if (ci->parentoid[0])
 428                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 429                         relpath, ci->parentoid, ci->parentoid);
 430
 431         if (ci->author) {
 432                 fputs("<b>Author:</b> ", fp);
 433                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 434                 fputs(" &lt;<a href=\"mailto:", fp);
 435                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 436                 fputs("\">", fp);
 437                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 438                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 439                 printtime(fp, &(ci->author->when));
 440                 fputc('\n', fp);
 441         }
 442         if (ci->msg) {
 443                 fputc('\n', fp);
 444                 xmlencode(fp, ci->msg, strlen(ci->msg));
 445                 fputc('\n', fp);
 446         }
 447 }
 448
 449 void
 450 printshowfile(FILE *fp, struct commitinfo *ci)
 451 {
 452         const git_diff_delta *delta;
 453         const git_diff_hunk *hunk;
 454         const git_diff_line *line;
 455         git_patch *patch;
 456         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 457         char linestr[80];
 458
 459         printcommit(fp, ci);
 460
 461         if (!ci->deltas)
 462                 return;
 463
 464         if (ci->filecount > 1000   ||
 465             ci->ndeltas   > 1000   ||
 466             ci->addcount  > 100000 ||
 467             ci->delcount  > 100000) {
 468                 fprintf(fp, "(diff is too large, output suppressed)");
 469                 return;
 470         }
 471
 472         /* diff stat */
 473         fputs("<b>Diffstat:</b>\n<table>", fp);
 474         for (i = 0; i < ci->ndeltas; i++) {
 475                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 476                 fputs("<tr><td>", fp);
 477                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 478                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 479                         fputs(" -&gt; ", fp);
 480                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 481                 }
 482
 483                 add = ci->deltas[i]->addcount;
 484                 del = ci->deltas[i]->delcount;
 485                 changed = add + del;
 486                 total = sizeof(linestr) - 2;
 487                 if (changed > total) {
 488                         if (add)
 489                                 add = ((float)total / changed * add) + 1;
 490                         if (del)
 491                                 del = ((float)total / changed * del) + 1;
 492                 }
 493                 memset(&linestr, '+', add);
 494                 memset(&linestr[add], '-', del);
 495
 496                 fprintf(fp, "</td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 497                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 498                 fwrite(&linestr, 1, add, fp);
 499                 fputs("</span><span class=\"d\">", fp);
 500                 fwrite(&linestr[add], 1, del, fp);
 501                 fputs("</span></td></tr>\n", fp);
 502         }
 503         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 504                 ci->filecount, ci->filecount == 1 ? "" : "s",
 505                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 506                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 507
 508         fputs("<hr/>", fp);
 509
 510         for (i = 0; i < ci->ndeltas; i++) {
 511                 patch = ci->deltas[i]->patch;
 512                 delta = git_patch_get_delta(patch);
 513                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 514                         relpath, delta->old_file.path, delta->old_file.path,
 515                         relpath, delta->new_file.path, delta->new_file.path);
 516
 517                 /* check binary data */
 518                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 519                         fputs("Binary files differ\n", fp);
 520                         continue;
 521                 }
 522
 523                 nhunks = git_patch_num_hunks(patch);
 524                 for (j = 0; j < nhunks; j++) {
 525                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 526                                 break;
 527
 528                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 529                         xmlencode(fp, hunk->header, hunk->header_len);
 530                         fputs("</a>", fp);
 531
 532                         for (k = 0; ; k++) {
 533                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 534                                         break;
 535                                 if (line->old_lineno == -1)
 536                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 537                                                 i, j, k, i, j, k);
 538                                 else if (line->new_lineno == -1)
 539                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 540                                                 i, j, k, i, j, k);
 541                                 else
 542                                         fputc(' ', fp);
 543                                 xmlencode(fp, line->content, line->content_len);
 544                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 545                                         fputs("</a>", fp);
 546                         }
 547                 }
 548         }
 549 }
 550
 551 void
 552 writelogline(FILE *fp, struct commitinfo *ci)
 553 {
 554         size_t len;
 555
 556         fputs("<tr><td>", fp);
 557         if (ci->author)
 558                 printtimeshort(fp, &(ci->author->when));
 559         fputs("</td><td>", fp);
 560         if (ci->summary) {
 561                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 562                 if ((len = strlen(ci->summary)) > summarylen) {
 563                         xmlencode(fp, ci->summary, summarylen - 1);
 564                         fputs("…", fp);
 565                 } else {
 566                         xmlencode(fp, ci->summary, len);
 567                 }
 568                 fputs("</a>", fp);
 569         }
 570         fputs("</td><td>", fp);
 571         if (ci->author)
 572                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 573         fputs("</td><td class=\"num\">", fp);
 574         fprintf(fp, "%zu", ci->filecount);
 575         fputs("</td><td class=\"num\">", fp);
 576         fprintf(fp, "+%zu", ci->addcount);
 577         fputs("</td><td class=\"num\">", fp);
 578         fprintf(fp, "-%zu", ci->delcount);
 579         fputs("</td></tr>\n", fp);
 580 }
 581
 582 int
 583 writelog(FILE *fp, const git_oid *oid)
 584 {
 585         struct commitinfo *ci;
 586         git_revwalk *w = NULL;
 587         git_oid id;
 588         char path[PATH_MAX];
 589         FILE *fpfile;
 590         int r;
 591
 592         git_revwalk_new(&w, repo);
 593         git_revwalk_push(w, oid);
 594         git_revwalk_sorting(w, GIT_SORT_TIME);
 595         git_revwalk_simplify_first_parent(w);
 596
 597         while (!git_revwalk_next(&id, w)) {
 598                 relpath = "";
 599
 600                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 601                         break;
 602                 if (!(ci = commitinfo_getbyoid(&id)))
 603                         break;
 604
 605                 writelogline(fp, ci);
 606                 if (cachefile)
 607                         writelogline(wcachefp, ci);
 608
 609                 relpath = "../";
 610
 611                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 612                 if (r == -1 || (size_t)r >= sizeof(path))
 613                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 614
 615                 /* check if file exists if so skip it */
 616                 if (access(path, F_OK)) {
 617                         fpfile = efopen(path, "w");
 618                         writeheader(fpfile, ci->summary);
 619                         fputs("<pre>", fpfile);
 620                         printshowfile(fpfile, ci);
 621                         fputs("</pre>\n", fpfile);
 622                         writefooter(fpfile);
 623                         fclose(fpfile);
 624                 }
 625                 commitinfo_free(ci);
 626         }
 627         git_revwalk_free(w);
 628
 629         relpath = "";
 630
 631         return 0;
 632 }
 633
 634 void
 635 printcommitatom(FILE *fp, struct commitinfo *ci)
 636 {
 637         fputs("<entry>\n", fp);
 638
 639         fprintf(fp, "<id>%s</id>\n", ci->oid);
 640         if (ci->author) {
 641                 fputs("<published>", fp);
 642                 printtimez(fp, &(ci->author->when));
 643                 fputs("</published>\n", fp);
 644         }
 645         if (ci->committer) {
 646                 fputs("<updated>", fp);
 647                 printtimez(fp, &(ci->committer->when));
 648                 fputs("</updated>\n", fp);
 649         }
 650         if (ci->summary) {
 651                 fputs("<title type=\"text\">", fp);
 652                 xmlencode(fp, ci->summary, strlen(ci->summary));
 653                 fputs("</title>\n", fp);
 654         }
 655         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 656                 ci->oid);
 657
 658         if (ci->author) {
 659                 fputs("<author><name>", fp);
 660                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 661                 fputs("</name>\n<email>", fp);
 662                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 663                 fputs("</email>\n</author>\n", fp);
 664         }
 665
 666         fputs("<content type=\"text\">", fp);
 667         fprintf(fp, "commit %s\n", ci->oid);
 668         if (ci->parentoid[0])
 669                 fprintf(fp, "parent %s\n", ci->parentoid);
 670         if (ci->author) {
 671                 fputs("Author: ", fp);
 672                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 673                 fputs(" &lt;", fp);
 674                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 675                 fputs("&gt;\nDate:   ", fp);
 676                 printtime(fp, &(ci->author->when));
 677                 fputc('\n', fp);
 678         }
 679         if (ci->msg) {
 680                 fputc('\n', fp);
 681                 xmlencode(fp, ci->msg, strlen(ci->msg));
 682         }
 683         fputs("\n</content>\n</entry>\n", fp);
 684 }
 685
 686 int
 687 writeatom(FILE *fp)
 688 {
 689         struct commitinfo *ci;
 690         git_revwalk *w = NULL;
 691         git_oid id;
 692         size_t i, m = 100; /* last 'm' commits */
 693
 694         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 695               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 696         xmlencode(fp, stripped_name, strlen(stripped_name));
 697         fputs(", branch HEAD</title>\n<subtitle>", fp);
 698         xmlencode(fp, description, strlen(description));
 699         fputs("</subtitle>\n", fp);
 700
 701         git_revwalk_new(&w, repo);
 702         git_revwalk_push_head(w);
 703         git_revwalk_sorting(w, GIT_SORT_TIME);
 704         git_revwalk_simplify_first_parent(w);
 705
 706         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 707                 if (!(ci = commitinfo_getbyoid(&id)))
 708                         break;
 709                 printcommitatom(fp, ci);
 710                 commitinfo_free(ci);
 711         }
 712         git_revwalk_free(w);
 713
 714         fputs("</feed>", fp);
 715
 716         return 0;
 717 }
 718
 719 int
 720 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 721 {
 722         char tmp[PATH_MAX] = "", *d;
 723         const char *p;
 724         int lc = 0;
 725         FILE *fp;
 726
 727         d = xdirname(fpath);
 728         if (mkdirp(d)) {
 729                 free(d);
 730                 return -1;
 731         }
 732         free(d);
 733
 734         p = fpath;
 735         while (*p) {
 736                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 737                         errx(1, "path truncated: '../%s'", tmp);
 738                 p++;
 739         }
 740         relpath = tmp;
 741
 742         fp = efopen(fpath, "w");
 743         writeheader(fp, filename);
 744         fputs("<p> ", fp);
 745         xmlencode(fp, filename, strlen(filename));
 746         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 747         fputs("</p><hr/>", fp);
 748
 749         if (git_blob_is_binary((git_blob *)obj)) {
 750                 fputs("<p>Binary file</p>\n", fp);
 751         } else {
 752                 lc = writeblobhtml(fp, (git_blob *)obj);
 753                 if (ferror(fp))
 754                         err(1, "fwrite");
 755         }
 756         writefooter(fp);
 757         fclose(fp);
 758
 759         relpath = "";
 760
 761         return lc;
 762 }
 763
 764 const char *
 765 filemode(git_filemode_t m)
 766 {
 767         static char mode[11];
 768
 769         memset(mode, '-', sizeof(mode) - 1);
 770         mode[10] = '\0';
 771
 772         if (S_ISREG(m))
 773                 mode[0] = '-';
 774         else if (S_ISBLK(m))
 775                 mode[0] = 'b';
 776         else if (S_ISCHR(m))
 777                 mode[0] = 'c';
 778         else if (S_ISDIR(m))
 779                 mode[0] = 'd';
 780         else if (S_ISFIFO(m))
 781                 mode[0] = 'p';
 782         else if (S_ISLNK(m))
 783                 mode[0] = 'l';
 784         else if (S_ISSOCK(m))
 785                 mode[0] = 's';
 786         else
 787                 mode[0] = '?';
 788
 789         if (m & S_IRUSR) mode[1] = 'r';
 790         if (m & S_IWUSR) mode[2] = 'w';
 791         if (m & S_IXUSR) mode[3] = 'x';
 792         if (m & S_IRGRP) mode[4] = 'r';
 793         if (m & S_IWGRP) mode[5] = 'w';
 794         if (m & S_IXGRP) mode[6] = 'x';
 795         if (m & S_IROTH) mode[7] = 'r';
 796         if (m & S_IWOTH) mode[8] = 'w';
 797         if (m & S_IXOTH) mode[9] = 'x';
 798
 799         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 800         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 801         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 802
 803         return mode;
 804 }
 805
 806 int
 807 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 808 {
 809         const git_tree_entry *entry = NULL;
 810         git_submodule *module = NULL;
 811         git_object *obj = NULL;
 812         git_off_t filesize;
 813         const char *entryname;
 814         char filepath[PATH_MAX], entrypath[PATH_MAX];
 815         size_t count, i;
 816         int lc, r, ret;
 817
 818         count = git_tree_entrycount(tree);
 819         for (i = 0; i < count; i++) {
 820                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 821                     !(entryname = git_tree_entry_name(entry)))
 822                         return -1;
 823                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 824                          path, path[0] ? "/" : "", entryname);
 825                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 826                         errx(1, "path truncated: '%s%s%s'",
 827                                 path, path[0] ? "/" : "", entryname);
 828
 829                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 830                          path, path[0] ? "/" : "", entryname);
 831                 if (r == -1 || (size_t)r >= sizeof(filepath))
 832                         errx(1, "path truncated: 'file/%s%s%s.html'",
 833                                 path, path[0] ? "/" : "", entryname);
 834
 835                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 836                         switch (git_object_type(obj)) {
 837                         case GIT_OBJ_BLOB:
 838                                 break;
 839                         case GIT_OBJ_TREE:
 840                                 /* NOTE: recurses */
 841                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 842                                                      entrypath);
 843                                 git_object_free(obj);
 844                                 if (ret)
 845                                         return ret;
 846                                 continue;
 847                         default:
 848                                 git_object_free(obj);
 849                                 continue;
 850                         }
 851
 852                         filesize = git_blob_rawsize((git_blob *)obj);
 853                         lc = writeblob(obj, filepath, entryname, filesize);
 854
 855                         fputs("<tr><td>", fp);
 856                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 857                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 858                         xmlencode(fp, entrypath, strlen(entrypath));
 859                         fputs("</a></td><td class=\"num\">", fp);
 860                         if (showlinecount && lc > 0)
 861                                 fprintf(fp, "%dL", lc);
 862                         else
 863                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 864                         fputs("</td></tr>\n", fp);
 865                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 866                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 867                                 relpath);
 868                         xmlencode(fp, entrypath, strlen(entrypath));
 869                         git_submodule_free(module);
 870                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 871                 }
 872         }
 873
 874         return 0;
 875 }
 876
 877 int
 878 writefiles(FILE *fp, const git_oid *id, const char *branch)
 879 {
 880         git_tree *tree = NULL;
 881         git_commit *commit = NULL;
 882         int ret = -1;
 883
 884         fputs("<table id=\"files\"><thead>\n<tr>"
 885               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 886               "</tr>\n</thead><tbody>\n", fp);
 887
 888         if (git_commit_lookup(&commit, repo, id) ||
 889             git_commit_tree(&tree, commit))
 890                 goto err;
 891         ret = writefilestree(fp, tree, branch, "");
 892
 893 err:
 894         fputs("</tbody></table>", fp);
 895
 896         git_commit_free(commit);
 897         git_tree_free(tree);
 898
 899         return ret;
 900 }
 901
 902 int
 903 refs_cmp(const void *v1, const void *v2)
 904 {
 905         git_reference *r1 = (*(git_reference **)v1);
 906         git_reference *r2 = (*(git_reference **)v2);
 907         int t1, t2;
 908
 909         t1 = git_reference_is_branch(r1);
 910         t2 = git_reference_is_branch(r2);
 911
 912         if (t1 != t2)
 913                 return t1 - t2;
 914
 915         return strcmp(git_reference_shorthand(r1),
 916                       git_reference_shorthand(r2));
 917 }
 918
 919 int
 920 writerefs(FILE *fp)
 921 {
 922         struct commitinfo *ci;
 923         const git_oid *id = NULL;
 924         git_object *obj = NULL;
 925         git_reference *dref = NULL, *r, *ref = NULL;
 926         git_reference_iterator *it = NULL;
 927         git_reference **refs = NULL;
 928         size_t count, i, j, refcount;
 929         const char *titles[] = { "Branches", "Tags" };
 930         const char *ids[] = { "branches", "tags" };
 931         const char *name;
 932
 933         if (git_reference_iterator_new(&it, repo))
 934                 return -1;
 935
 936         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 937                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 938                         err(1, "realloc");
 939                 refs[refcount] = ref;
 940         }
 941         git_reference_iterator_free(it);
 942
 943         /* sort by type then shorthand name */
 944         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 945
 946         for (j = 0; j < 2; j++) {
 947                 for (i = 0, count = 0; i < refcount; i++) {
 948                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 949                             !(git_reference_is_tag(refs[i]) && j == 1))
 950                                 continue;
 951
 952                         switch (git_reference_type(refs[i])) {
 953                         case GIT_REF_SYMBOLIC:
 954                                 if (git_reference_resolve(&dref, refs[i]))
 955                                         goto err;
 956                                 r = dref;
 957                                 break;
 958                         case GIT_REF_OID:
 959                                 r = refs[i];
 960                                 break;
 961                         default:
 962                                 continue;
 963                         }
 964                         if (!(id = git_reference_target(r)))
 965                                 goto err;
 966                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 967                                 goto err;
 968                         if (!(id = git_object_id(obj)))
 969                                 goto err;
 970                         if (!(ci = commitinfo_getbyoid(id)))
 971                                 break;
 972
 973                         /* print header if it has an entry (first). */
 974                         if (++count == 1) {
 975                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 976                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 977                                       titles[j], ids[j]);
 978                         }
 979
 980                         relpath = "";
 981                         name = git_reference_shorthand(r);
 982
 983                         fputs("<tr><td>", fp);
 984                         xmlencode(fp, name, strlen(name));
 985                         fputs("</td><td>", fp);
 986                         if (ci->author)
 987                                 printtimeshort(fp, &(ci->author->when));
 988                         fputs("</td><td>", fp);
 989                         if (ci->author)
 990                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 991                         fputs("</td></tr>\n", fp);
 992
 993                         relpath = "../";
 994
 995                         commitinfo_free(ci);
 996                         git_object_free(obj);
 997                         obj = NULL;
 998                         git_reference_free(dref);
 999                         dref = NULL;
1000                 }
1001                 /* table footer */
1002                 if (count)
1003                         fputs("</tbody></table><br/>", fp);
1004         }
1005
1006 err:
1007         git_object_free(obj);
1008         git_reference_free(dref);
1009
1010         for (i = 0; i < refcount; i++)
1011                 git_reference_free(refs[i]);
1012         free(refs);
1013
1014         return 0;
1015 }
1016
1017 void
1018 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
1019 {
1020         int r;
1021
1022         r = snprintf(buf, bufsiz, "%s%s%s",
1023                 repodir, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
1024         if (r == -1 || (size_t)r >= bufsiz)
1025                 errx(1, "path truncated: '%s%s%s'",
1026                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
1027 }
1028
1029 void
1030 usage(char *argv0)
1031 {
1032         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
1033         exit(1);
1034 }
1035
1036 int
1037 main(int argc, char *argv[])
1038 {
1039         git_object *obj = NULL;
1040         const git_oid *head = NULL;
1041         const git_error *e = NULL;
1042         FILE *fp, *fpread;
1043         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1044         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1045         size_t n;
1046         int i, fd;
1047
1048         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1049                 err(1, "pledge");
1050
1051         for (i = 1; i < argc; i++) {
1052                 if (argv[i][0] != '-') {
1053                         if (repodir)
1054                                 usage(argv[0]);
1055                         repodir = argv[i];
1056                 } else if (argv[i][1] == 'c') {
1057                         if (i + 1 >= argc)
1058                                 usage(argv[0]);
1059                         cachefile = argv[++i];
1060                 }
1061         }
1062         if (!repodir)
1063                 usage(argv[0]);
1064
1065         if (!realpath(repodir, repodirabs))
1066                 err(1, "realpath");
1067
1068         git_libgit2_init();
1069
1070         if (git_repository_open_ext(&repo, repodir,
1071                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1072                 e = giterr_last();
1073                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1074                 return 1;
1075         }
1076
1077         /* find HEAD */
1078         if (git_revparse_single(&obj, repo, "HEAD"))
1079                 return 1;
1080         head = git_object_id(obj);
1081         git_object_free(obj);
1082
1083         /* use directory name as name */
1084         if ((name = strrchr(repodirabs, '/')))
1085                 name++;
1086         else
1087                 name = "";
1088
1089         /* strip .git suffix */
1090         if (!(stripped_name = strdup(name)))
1091                 err(1, "strdup");
1092         if ((p = strrchr(stripped_name, '.')))
1093                 if (!strcmp(p, ".git"))
1094                         *p = '\0';
1095
1096         /* read description or .git/description */
1097         joinpath(path, sizeof(path), repodir, "description");
1098         if (!(fpread = fopen(path, "r"))) {
1099                 joinpath(path, sizeof(path), repodir, ".git/description");
1100                 fpread = fopen(path, "r");
1101         }
1102         if (fpread) {
1103                 if (!fgets(description, sizeof(description), fpread))
1104                         description[0] = '\0';
1105                 fclose(fpread);
1106         }
1107
1108         /* read url or .git/url */
1109         joinpath(path, sizeof(path), repodir, "url");
1110         if (!(fpread = fopen(path, "r"))) {
1111                 joinpath(path, sizeof(path), repodir, ".git/url");
1112                 fpread = fopen(path, "r");
1113         }
1114         if (fpread) {
1115                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1116                         cloneurl[0] = '\0';
1117                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1118                 fclose(fpread);
1119         }
1120
1121         /* check LICENSE */
1122         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1123         git_object_free(obj);
1124         /* check README */
1125         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1126         git_object_free(obj);
1127         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
1128         git_object_free(obj);
1129
1130         /* log for HEAD */
1131         fp = efopen("log.html", "w");
1132         relpath = "";
1133         mkdir("commit", 0755);
1134         writeheader(fp, "Log");
1135         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1136                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1137                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1138
1139         if (cachefile) {
1140                 /* read from cache file (does not need to exist) */
1141                 if ((rcachefp = fopen(cachefile, "r"))) {
1142                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1143                                 errx(1, "%s: no object id", cachefile);
1144                         if (git_oid_fromstr(&lastoid, lastoidstr))
1145                                 errx(1, "%s: invalid object id", cachefile);
1146                 }
1147
1148                 /* write log to (temporary) cache */
1149                 if ((fd = mkstemp(tmppath)) == -1)
1150                         err(1, "mkstemp");
1151                 if (!(wcachefp = fdopen(fd, "w")))
1152                         err(1, "fdopen");
1153                 /* write last commit id (HEAD) */
1154                 git_oid_tostr(buf, sizeof(buf), head);
1155                 fprintf(wcachefp, "%s\n", buf);
1156
1157                 writelog(fp, head);
1158
1159                 if (rcachefp) {
1160                         /* append previous log to log.html and the new cache */
1161                         while (!feof(rcachefp)) {
1162                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1163                                 if (ferror(rcachefp))
1164                                         err(1, "fread");
1165                                 if (fwrite(buf, 1, n, fp) != n)
1166                                         err(1, "fwrite");
1167                                 if (fwrite(buf, 1, n, wcachefp) != n)
1168                                         err(1, "fwrite");
1169                         }
1170                         fclose(rcachefp);
1171                 }
1172                 fclose(wcachefp);
1173         } else {
1174                 writelog(fp, head);
1175         }
1176
1177         fputs("</tbody></table>", fp);
1178         writefooter(fp);
1179         fclose(fp);
1180
1181         /* files for HEAD */
1182         fp = efopen("files.html", "w");
1183         writeheader(fp, "Files");
1184         writefiles(fp, head, "HEAD");
1185         writefooter(fp);
1186         fclose(fp);
1187
1188         /* summary page with branches and tags */
1189         fp = efopen("refs.html", "w");
1190         writeheader(fp, "Refs");
1191         writerefs(fp);
1192         writefooter(fp);
1193         fclose(fp);
1194
1195         /* Atom feed */
1196         fp = efopen("atom.xml", "w");
1197         writeatom(fp);
1198         fclose(fp);
1199
1200         /* rename new cache file on success */
1201         if (cachefile && rename(tmppath, cachefile))
1202                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1203
1204         /* cleanup */
1205         git_repository_free(repo);
1206         git_libgit2_shutdown();
1207
1208         return 0;
1209 }