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