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