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 commitinfo {
  19         const git_oid *id;
  20
  21         char oid[GIT_OID_HEXSZ + 1];
  22         char parentoid[GIT_OID_HEXSZ + 1];
  23
  24         const git_signature *author;
  25         const char *summary;
  26         const char *msg;
  27
  28         git_diff_stats *stats;
  29         git_diff       *diff;
  30         git_commit     *commit;
  31         git_commit     *parent;
  32         git_tree       *commit_tree;
  33         git_tree       *parent_tree;
  34
  35         size_t addcount;
  36         size_t delcount;
  37         size_t filecount;
  38 };
  39
  40 static git_repository *repo;
  41
  42 static const char *relpath = "";
  43 static const char *repodir;
  44
  45 static char name[255];
  46 static char description[255];
  47 static char cloneurl[1024];
  48 static int hasreadme, haslicense;
  49
  50 void
  51 commitinfo_free(struct commitinfo *ci)
  52 {
  53         if (!ci)
  54                 return;
  55
  56         git_diff_stats_free(ci->stats);
  57         git_diff_free(ci->diff);
  58         git_tree_free(ci->commit_tree);
  59         git_tree_free(ci->parent_tree);
  60         git_commit_free(ci->commit);
  61 }
  62
  63 struct commitinfo *
  64 commitinfo_getbyoid(const git_oid *id)
  65 {
  66         struct commitinfo *ci;
  67         git_diff_options opts;
  68         int error;
  69
  70         if (!(ci = calloc(1, sizeof(struct commitinfo))))
  71                 err(1, "calloc");
  72
  73         ci->id = id;
  74         if (git_commit_lookup(&(ci->commit), repo, id))
  75                 goto err;
  76
  77         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
  78         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
  79
  80         ci->author = git_commit_author(ci->commit);
  81         ci->summary = git_commit_summary(ci->commit);
  82         ci->msg = git_commit_message(ci->commit);
  83
  84         if ((error = git_commit_tree(&(ci->commit_tree), ci->commit)))
  85                 goto err;
  86         if (!(error = git_commit_parent(&(ci->parent), ci->commit, 0))) {
  87                 if ((error = git_commit_tree(&(ci->parent_tree), ci->parent)))
  88                         goto err;
  89         } else {
  90                 ci->parent = NULL;
  91                 ci->parent_tree = NULL;
  92         }
  93
  94         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
  95         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
  96         if ((error = git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts)))
  97                 goto err;
  98         if (git_diff_get_stats(&(ci->stats), ci->diff))
  99                 goto err;
 100
 101         ci->addcount = git_diff_stats_insertions(ci->stats);
 102         ci->delcount = git_diff_stats_deletions(ci->stats);
 103         ci->filecount = git_diff_stats_files_changed(ci->stats);
 104
 105         return ci;
 106
 107 err:
 108         commitinfo_free(ci);
 109         free(ci);
 110
 111         return NULL;
 112 }
 113
 114 FILE *
 115 efopen(const char *name, const char *flags)
 116 {
 117         FILE *fp;
 118
 119         if (!(fp = fopen(name, flags)))
 120                 err(1, "fopen");
 121
 122         return fp;
 123 }
 124
 125 /* Escape characters below as HTML 2.0 / XML 1.0. */
 126 void
 127 xmlencode(FILE *fp, const char *s, size_t len)
 128 {
 129         size_t i;
 130
 131         for (i = 0; *s && i < len; s++, i++) {
 132                 switch(*s) {
 133                 case '<':  fputs("&lt;",   fp); break;
 134                 case '>':  fputs("&gt;",   fp); break;
 135                 case '\'': fputs("&apos;", fp); break;
 136                 case '&':  fputs("&amp;",  fp); break;
 137                 case '"':  fputs("&quot;", fp); break;
 138                 default:   fputc(*s, fp);
 139                 }
 140         }
 141 }
 142
 143 /* Some implementations of dirname(3) return a pointer to a static
 144  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 145  * This is a wrapper function that is compatible with both versions.
 146  * The program will error out if dirname(3) failed, this can only happen
 147  * with the OpenBSD version. */
 148 char *
 149 xdirname(const char *path)
 150 {
 151         char *p, *b;
 152
 153         if (!(p = strdup(path)))
 154                 err(1, "strdup");
 155         if (!(b = dirname(p)))
 156                 err(1, "basename");
 157         if (!(b = strdup(b)))
 158                 err(1, "strdup");
 159         free(p);
 160
 161         return b;
 162 }
 163
 164 /* Some implementations of basename(3) return a pointer to a static
 165  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 166  * This is a wrapper function that is compatible with both versions.
 167  * The program will error out if basename(3) failed, this can only happen
 168  * with the OpenBSD version. */
 169 char *
 170 xbasename(const char *path)
 171 {
 172         char *p, *b;
 173
 174         if (!(p = strdup(path)))
 175                 err(1, "strdup");
 176         if (!(b = basename(p)))
 177                 err(1, "basename");
 178         if (!(b = strdup(b)))
 179                 err(1, "strdup");
 180         free(p);
 181
 182         return b;
 183 }
 184
 185 int
 186 mkdirp(const char *path)
 187 {
 188         char tmp[PATH_MAX], *p;
 189
 190         strlcpy(tmp, path, sizeof(tmp));
 191         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 192                 if (*p != '/')
 193                         continue;
 194                 *p = '\0';
 195                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 196                         return -1;
 197                 *p = '/';
 198         }
 199         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 200                 return -1;
 201         return 0;
 202 }
 203
 204 void
 205 printtimeformat(FILE *fp, const git_time *intime, const char *fmt)
 206 {
 207         struct tm *intm;
 208         time_t t;
 209         char out[32];
 210
 211         t = (time_t) intime->time + (intime->offset * 60);
 212         intm = gmtime(&t);
 213         strftime(out, sizeof(out), fmt, intm);
 214         fputs(out, fp);
 215 }
 216
 217 void
 218 printtimez(FILE *fp, const git_time *intime)
 219 {
 220         printtimeformat(fp, intime, "%Y-%m-%dT%H:%M:%SZ");
 221 }
 222
 223 void
 224 printtime(FILE *fp, const git_time *intime)
 225 {
 226         printtimeformat(fp, intime, "%a %b %e %T %Y");
 227 }
 228
 229 void
 230 printtimeshort(FILE *fp, const git_time *intime)
 231 {
 232         printtimeformat(fp, intime, "%Y-%m-%d %H:%M");
 233 }
 234
 235 int
 236 writeheader(FILE *fp)
 237 {
 238         fputs("<!DOCTYPE HTML>"
 239                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 240                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 241                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 242         xmlencode(fp, name, strlen(name));
 243         if (description[0])
 244                 fputs(" - ", fp);
 245         xmlencode(fp, description, strlen(description));
 246         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 247         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 248                 name, relpath);
 249         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 250         fputs("</head>\n<body>\n<table><tr><td>", fp);
 251         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 252                 relpath, relpath);
 253         fputs("</td><td><h1>", fp);
 254         xmlencode(fp, name, strlen(name));
 255         fputs("</h1><span class=\"desc\">", fp);
 256         xmlencode(fp, description, strlen(description));
 257         fputs("</span></td></tr>", fp);
 258         if (cloneurl[0]) {
 259                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 260                 xmlencode(fp, cloneurl, strlen(cloneurl));
 261                 fputs("\">", fp);
 262                 xmlencode(fp, cloneurl, strlen(cloneurl));
 263                 fputs("</a></td></tr>", fp);
 264         }
 265         fputs("<tr><td></td><td>\n", fp);
 266         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 267         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 268         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 269         if (hasreadme)
 270                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 271         if (haslicense)
 272                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 273         fputs("</td></tr></table>\n<hr/><div id=\"content\">\n", fp);
 274
 275         return 0;
 276 }
 277
 278 int
 279 writefooter(FILE *fp)
 280 {
 281         return !fputs("</div></body>\n</html>", fp);
 282 }
 283
 284 void
 285 writeblobhtml(FILE *fp, const git_blob *blob)
 286 {
 287         off_t i;
 288         size_t n = 1;
 289         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 290         const char *s = git_blob_rawcontent(blob);
 291         git_off_t len = git_blob_rawsize(blob);
 292
 293         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 294
 295         if (len) {
 296                 fprintf(fp, nfmt, n, n, n);
 297                 for (i = 0; i < len - 1; i++) {
 298                         if (s[i] == '\n') {
 299                                 n++;
 300                                 fprintf(fp, nfmt, n, n, n);
 301                         }
 302                 }
 303         }
 304
 305         fputs("</pre></td><td><pre>\n", fp);
 306         xmlencode(fp, s, (size_t)len);
 307         fputs("</pre></td></tr></table>\n", fp);
 308 }
 309
 310 void
 311 printcommit(FILE *fp, struct commitinfo *ci)
 312 {
 313         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 314                 relpath, ci->oid, ci->oid);
 315
 316         if (ci->parentoid[0])
 317                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 318                         relpath, ci->parentoid, ci->parentoid);
 319
 320 #if 0
 321         if ((count = (int)git_commit_parentcount(commit)) > 1) {
 322                 fputs("<b>Merge:</b>", fp);
 323                 for (i = 0; i < count; i++) {
 324                         git_oid_tostr(buf, 8, git_commit_parent_id(commit, i));
 325                         fprintf(fp, " <a href=\"%scommit/%s.html\">%s</a>",
 326                                 relpath, buf, buf);
 327                 }
 328                 fputc('\n', fp);
 329         }
 330 #endif
 331         if (ci->author) {
 332                 fputs("<b>Author:</b> ", fp);
 333                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 334                 fputs(" &lt;<a href=\"mailto:", fp);
 335                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 336                 fputs("\">", fp);
 337                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 338                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 339                 printtime(fp, &(ci->author->when));
 340                 fputc('\n', fp);
 341         }
 342         fputc('\n', fp);
 343
 344         if (ci->msg)
 345                 xmlencode(fp, ci->msg, strlen(ci->msg));
 346
 347         fputc('\n', fp);
 348 }
 349
 350 void
 351 printshowfile(struct commitinfo *ci)
 352 {
 353         const git_diff_delta *delta;
 354         const git_diff_hunk *hunk;
 355         const git_diff_line *line;
 356         git_patch *patch;
 357         git_buf statsbuf;
 358         size_t ndeltas, nhunks, nhunklines;
 359         FILE *fp;
 360         size_t i, j, k;
 361         char path[PATH_MAX];
 362
 363         snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 364         /* check if file exists if so skip it */
 365         if (!access(path, F_OK))
 366                 return;
 367
 368         fp = efopen(path, "w");
 369         writeheader(fp);
 370         fputs("<pre>\n", fp);
 371         printcommit(fp, ci);
 372
 373         memset(&statsbuf, 0, sizeof(statsbuf));
 374
 375         /* diff stat */
 376         if (ci->stats) {
 377                 if (!git_diff_stats_to_buf(&statsbuf, ci->stats,
 378                     GIT_DIFF_STATS_FULL | GIT_DIFF_STATS_SHORT, 80)) {
 379                         if (statsbuf.ptr && statsbuf.ptr[0]) {
 380                                 fputs("<b>Diffstat:</b>\n", fp);
 381                                 fputs(statsbuf.ptr, fp);
 382                         }
 383                 }
 384         }
 385
 386         fputs("<hr/>", fp);
 387
 388         ndeltas = git_diff_num_deltas(ci->diff);
 389         for (i = 0; i < ndeltas; i++) {
 390                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 391                         git_patch_free(patch);
 392                         break;
 393                 }
 394
 395                 delta = git_patch_get_delta(patch);
 396                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 397                         relpath, delta->old_file.path, delta->old_file.path,
 398                         relpath, delta->new_file.path, delta->new_file.path);
 399
 400                 /* check binary data */
 401                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 402                         fputs("Binary files differ\n", fp);
 403                         git_patch_free(patch);
 404                         continue;
 405                 }
 406
 407                 nhunks = git_patch_num_hunks(patch);
 408                 for (j = 0; j < nhunks; j++) {
 409                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 410                                 break;
 411
 412                         fprintf(fp, "<span class=\"h\">%s</span>\n", hunk->header);
 413
 414                         for (k = 0; ; k++) {
 415                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 416                                         break;
 417                                 if (line->old_lineno == -1)
 418                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"i\">+",
 419                                                 j, k, j, k);
 420                                 else if (line->new_lineno == -1)
 421                                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"d\">-",
 422                                                 j, k, j, k);
 423                                 else
 424                                         fputc(' ', fp);
 425                                 xmlencode(fp, line->content, line->content_len);
 426                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 427                                         fputs("</a>", fp);
 428                         }
 429                 }
 430                 git_patch_free(patch);
 431         }
 432         git_buf_free(&statsbuf);
 433
 434         fputs("</pre>\n", fp);
 435         writefooter(fp);
 436         fclose(fp);
 437         return;
 438 }
 439
 440 int
 441 writelog(FILE *fp, const char *branch)
 442 {
 443         struct commitinfo *ci;
 444         const git_oid *oid;
 445         git_revwalk *w = NULL;
 446         git_object *obj = NULL;
 447         git_oid id;
 448         size_t len;
 449
 450         mkdir("commit", 0755);
 451
 452         if (git_revparse_single(&obj, repo, branch))
 453                 return -1;
 454         oid = git_object_id(obj);
 455
 456         git_revwalk_new(&w, repo);
 457         git_revwalk_push(w, oid);
 458         git_revwalk_sorting(w, GIT_SORT_TIME);
 459         git_revwalk_simplify_first_parent(w);
 460
 461         fputs("<table id=\"log\"><thead>\n<tr><td>Age</td><td>Commit message</td>"
 462                   "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 463                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 464         while (!git_revwalk_next(&id, w)) {
 465                 relpath = "";
 466
 467                 if (!(ci = commitinfo_getbyoid(&id)))
 468                         break;
 469
 470                 fputs("<tr><td>", fp);
 471                 if (ci->author)
 472                         printtimeshort(fp, &(ci->author->when));
 473                 fputs("</td><td>", fp);
 474                 if (ci->summary) {
 475                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 476                         if ((len = strlen(ci->summary)) > summarylen) {
 477                                 xmlencode(fp, ci->summary, summarylen - 1);
 478                                 fputs("…", fp);
 479                         } else {
 480                                 xmlencode(fp, ci->summary, len);
 481                         }
 482                         fputs("</a>", fp);
 483                 }
 484                 fputs("</td><td>", fp);
 485                 if (ci->author)
 486                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 487                 fputs("</td><td class=\"num\">", fp);
 488                 fprintf(fp, "%zu", ci->filecount);
 489                 fputs("</td><td class=\"num\">", fp);
 490                 fprintf(fp, "+%zu", ci->addcount);
 491                 fputs("</td><td class=\"num\">", fp);
 492                 fprintf(fp, "-%zu", ci->delcount);
 493                 fputs("</td></tr>\n", fp);
 494
 495                 relpath = "../";
 496                 printshowfile(ci);
 497
 498                 commitinfo_free(ci);
 499         }
 500         fputs("</tbody></table>", fp);
 501
 502         git_revwalk_free(w);
 503         git_object_free(obj);
 504
 505         relpath = "";
 506
 507         return 0;
 508 }
 509
 510 void
 511 printcommitatom(FILE *fp, struct commitinfo *ci)
 512 {
 513         fputs("<entry>\n", fp);
 514
 515         fprintf(fp, "<id>%s</id>\n", ci->oid);
 516         if (ci->author) {
 517                 fputs("<updated>", fp);
 518                 printtimez(fp, &(ci->author->when));
 519                 fputs("</updated>\n", fp);
 520         }
 521         if (ci->summary) {
 522                 fputs("<title type=\"text\">", fp);
 523                 xmlencode(fp, ci->summary, strlen(ci->summary));
 524                 fputs("</title>\n", fp);
 525         }
 526
 527         fputs("<content type=\"text\">", fp);
 528         fprintf(fp, "commit %s\n", ci->oid);
 529         if (ci->parentoid[0])
 530                 fprintf(fp, "parent %s\n", ci->parentoid);
 531
 532 #if 0
 533         if ((count = (int)git_commit_parentcount(commit)) > 1) {
 534                 fputs("Merge:", fp);
 535                 for (i = 0; i < count; i++) {
 536                         git_oid_tostr(buf, 8, git_commit_parent_id(commit, i));
 537                         fprintf(fp, " %s", buf);
 538                 }
 539                 fputc('\n', fp);
 540         }
 541 #endif
 542
 543         if (ci->author) {
 544                 fputs("Author: ", fp);
 545                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 546                 fputs(" &lt;", fp);
 547                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 548                 fputs("&gt;\nDate:   ", fp);
 549                 printtime(fp, &(ci->author->when));
 550         }
 551         fputc('\n', fp);
 552
 553         if (ci->msg)
 554                 xmlencode(fp, ci->msg, strlen(ci->msg));
 555         fputs("\n</content>\n", fp);
 556         if (ci->author) {
 557                 fputs("<author><name>", fp);
 558                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 559                 fputs("</name>\n<email>", fp);
 560                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 561                 fputs("</email>\n</author>\n", fp);
 562         }
 563         fputs("</entry>\n", fp);
 564 }
 565
 566 int
 567 writeatom(FILE *fp)
 568 {
 569         struct commitinfo *ci;
 570         git_revwalk *w = NULL;
 571         git_oid id;
 572         size_t i, m = 100; /* max */
 573
 574         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 575               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 576         xmlencode(fp, name, strlen(name));
 577         fputs(", branch master</title>\n<subtitle>", fp);
 578
 579         xmlencode(fp, description, strlen(description));
 580         fputs("</subtitle>\n", fp);
 581
 582         git_revwalk_new(&w, repo);
 583         git_revwalk_push_head(w);
 584         git_revwalk_sorting(w, GIT_SORT_TIME);
 585         git_revwalk_simplify_first_parent(w);
 586
 587         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 588                 if (!(ci = commitinfo_getbyoid(&id)))
 589                         break;
 590                 printcommitatom(fp, ci);
 591                 commitinfo_free(ci);
 592         }
 593         git_revwalk_free(w);
 594
 595         fputs("</feed>", fp);
 596
 597         return 0;
 598 }
 599
 600 int
 601 writeblob(git_object *obj, const char *filename, git_off_t filesize)
 602 {
 603         char fpath[PATH_MAX];
 604         char tmp[PATH_MAX] = "";
 605         char *d, *p;
 606         FILE *fp;
 607
 608         snprintf(fpath, sizeof(fpath), "file/%s.html", filename);
 609         d = xdirname(fpath);
 610         if (mkdirp(d)) {
 611                 free(d);
 612                 return 1;
 613         }
 614         free(d);
 615
 616         p = fpath;
 617         while (*p) {
 618                 if (*p == '/')
 619                         strlcat(tmp, "../", sizeof(tmp));
 620                 p++;
 621         }
 622         relpath = tmp;
 623
 624         fp = efopen(fpath, "w");
 625         writeheader(fp);
 626         fputs("<p> ", fp);
 627         xmlencode(fp, filename, strlen(filename));
 628         fprintf(fp, " (%" PRIu32 "b)", filesize);
 629         fputs("</p><hr/>", fp);
 630
 631         if (git_blob_is_binary((git_blob *)obj)) {
 632                 fputs("<p>Binary file</p>\n", fp);
 633         } else {
 634                 writeblobhtml(fp, (git_blob *)obj);
 635                 if (ferror(fp))
 636                         err(1, "fwrite");
 637         }
 638         writefooter(fp);
 639         fclose(fp);
 640
 641         relpath = "";
 642
 643         return 0;
 644 }
 645
 646 const char *
 647 filemode(git_filemode_t m)
 648 {
 649         static char mode[11];
 650
 651         memset(mode, '-', sizeof(mode) - 1);
 652         mode[10] = '\0';
 653
 654         if (S_ISREG(m))
 655                 mode[0] = '-';
 656         else if (S_ISBLK(m))
 657                 mode[0] = 'b';
 658         else if (S_ISCHR(m))
 659                 mode[0] = 'c';
 660         else if (S_ISDIR(m))
 661                 mode[0] = 'd';
 662         else if (S_ISFIFO(m))
 663                 mode[0] = 'p';
 664         else if (S_ISLNK(m))
 665                 mode[0] = 'l';
 666         else if (S_ISSOCK(m))
 667                 mode[0] = 's';
 668         else
 669                 mode[0] = '?';
 670
 671         if (m & S_IRUSR) mode[1] = 'r';
 672         if (m & S_IWUSR) mode[2] = 'w';
 673         if (m & S_IXUSR) mode[3] = 'x';
 674         if (m & S_IRGRP) mode[4] = 'r';
 675         if (m & S_IWGRP) mode[5] = 'w';
 676         if (m & S_IXGRP) mode[6] = 'x';
 677         if (m & S_IROTH) mode[7] = 'r';
 678         if (m & S_IWOTH) mode[8] = 'w';
 679         if (m & S_IXOTH) mode[9] = 'x';
 680
 681         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 682         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 683         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 684
 685         return mode;
 686 }
 687
 688 int
 689 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 690 {
 691         const git_tree_entry *entry = NULL;
 692         const char *filename;
 693         char filepath[PATH_MAX];
 694         git_object *obj = NULL;
 695         git_off_t filesize;
 696         size_t count, i;
 697         int ret;
 698
 699         count = git_tree_entrycount(tree);
 700         for (i = 0; i < count; i++) {
 701                 if (!(entry = git_tree_entry_byindex(tree, i)))
 702                         return -1;
 703                 if (git_tree_entry_to_object(&obj, repo, entry))
 704                         return -1;
 705                 filename = git_tree_entry_name(entry);
 706                 switch (git_object_type(obj)) {
 707                 case GIT_OBJ_BLOB:
 708                         break;
 709                 case GIT_OBJ_TREE:
 710                         ret = writefilestree(fp, (git_tree *)obj, branch,
 711                                              filename);
 712                         git_object_free(obj);
 713                         if (ret)
 714                                 return ret;
 715                         continue;
 716                 default:
 717                         git_object_free(obj);
 718                         continue;
 719                 }
 720                 if (path[0]) {
 721                         snprintf(filepath, sizeof(filepath), "%s/%s",
 722                                  path, filename);
 723                         filename = filepath;
 724                 }
 725
 726                 filesize = git_blob_rawsize((git_blob *)obj);
 727
 728                 fputs("<tr><td>", fp);
 729                 fprintf(fp, "%s", filemode(git_tree_entry_filemode(entry)));
 730                 fprintf(fp, "</td><td><a href=\"%sfile/", relpath);
 731                 xmlencode(fp, filename, strlen(filename));
 732                 fputs(".html\">", fp);
 733                 xmlencode(fp, filename, strlen(filename));
 734                 fputs("</a></td><td class=\"num\">", fp);
 735                 fprintf(fp, "%" PRIu32, filesize);
 736                 fputs("</td></tr>\n", fp);
 737
 738                 writeblob(obj, filename, filesize);
 739         }
 740
 741         return 0;
 742 }
 743
 744 int
 745 writefiles(FILE *fp, const char *branch)
 746 {
 747         const git_oid *id;
 748         git_tree *tree = NULL;
 749         git_object *obj = NULL;
 750         git_commit *commit = NULL;
 751         int ret = -1;
 752
 753         fputs("<table id=\"files\"><thead>\n<tr>"
 754               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 755               "</tr>\n</thead><tbody>\n", fp);
 756
 757         if (git_revparse_single(&obj, repo, branch))
 758                 goto err;
 759         id = git_object_id(obj);
 760         if (git_commit_lookup(&commit, repo, id))
 761                 goto err;
 762         if (git_commit_tree(&tree, commit)) {
 763                 git_commit_free(commit);
 764                 goto err;
 765         }
 766         ret = writefilestree(fp, tree, branch, "");
 767
 768 err:
 769         fputs("</tbody></table>", fp);
 770
 771         git_object_free(obj);
 772         git_commit_free(commit);
 773         git_tree_free(tree);
 774
 775         return ret;
 776 }
 777
 778 int
 779 writebranches(FILE *fp)
 780 {
 781         struct commitinfo *ci;
 782         git_branch_iterator *it = NULL;
 783         git_branch_t branch;
 784         git_reference *ref = NULL, *dref = NULL;
 785         const git_oid *id = NULL;
 786         const char *branchname = NULL;
 787         size_t len;
 788         int ret = -1;
 789
 790         /* log for local branches */
 791         if (git_branch_iterator_new(&it, repo, GIT_BRANCH_LOCAL))
 792                 return -1;
 793
 794         fputs("<h2>Branches</h2><table id=\"branches\"><thead>\n<tr><td>Branch</td><td>Age</td>"
 795                   "<td>Commit message</td>"
 796                   "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 797                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 798
 799         while (!git_branch_next(&ref, &branch, it)) {
 800                 if (git_branch_name(&branchname, ref))
 801                         continue;
 802
 803                 id = NULL;
 804                 switch (git_reference_type(ref)) {
 805                 case GIT_REF_SYMBOLIC:
 806                         if (git_reference_resolve(&dref, ref))
 807                                 goto err;
 808                         id = git_reference_target(dref);
 809                         break;
 810                 case GIT_REF_OID:
 811                         id = git_reference_target(ref);
 812                         break;
 813                 default:
 814                         continue;
 815                 }
 816                 if (!id)
 817                         goto err;
 818                 if (!(ci = commitinfo_getbyoid(id)))
 819                         break;
 820
 821                 relpath = "";
 822
 823                 fputs("<tr><td>", fp);
 824                 xmlencode(fp, branchname, strlen(branchname));
 825                 fputs("</td><td>", fp);
 826                 if (ci->author)
 827                         printtimeshort(fp, &(ci->author->when));
 828                 fputs("</td><td>", fp);
 829                 if (ci->summary) {
 830                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 831                         if ((len = strlen(ci->summary)) > summarylen) {
 832                                 xmlencode(fp, ci->summary, summarylen - 1);
 833                                 fputs("…", fp);
 834                         } else {
 835                                 xmlencode(fp, ci->summary, len);
 836                         }
 837                         fputs("</a>", fp);
 838                 }
 839                 fputs("</td><td>", fp);
 840                 if (ci->author)
 841                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 842                 fputs("</td><td class=\"num\">", fp);
 843                 fprintf(fp, "%zu", ci->filecount);
 844                 fputs("</td><td class=\"num\">", fp);
 845                 fprintf(fp, "+%zu", ci->addcount);
 846                 fputs("</td><td class=\"num\">", fp);
 847                 fprintf(fp, "-%zu", ci->delcount);
 848                 fputs("</td></tr>\n", fp);
 849
 850                 relpath = "../";
 851
 852                 commitinfo_free(ci);
 853                 git_reference_free(ref);
 854                 git_reference_free(dref);
 855                 ref = NULL;
 856                 dref = NULL;
 857         }
 858         ret = 0;
 859
 860 err:
 861         fputs("</tbody></table>", fp);
 862         git_reference_free(ref);
 863         git_reference_free(dref);
 864         git_branch_iterator_free(it);
 865
 866         return ret;
 867 }
 868
 869 int
 870 tagcompare(void *s1, void *s2)
 871 {
 872         return strcmp(*(char **)s1, *(char **)s2);
 873 }
 874
 875 int
 876 writetags(FILE *fp)
 877 {
 878         struct commitinfo *ci;
 879         git_strarray tagnames;
 880         git_object *obj = NULL;
 881         const git_oid *id = NULL;
 882         size_t i, len;
 883
 884         /* summary page with branches and tags */
 885         memset(&tagnames, 0, sizeof(tagnames));
 886         if (git_tag_list(&tagnames, repo))
 887                 return -1;
 888         if (!tagnames.count) {
 889                 git_strarray_free(&tagnames);
 890                 return 0;
 891         }
 892
 893         /* sort names */
 894         qsort(tagnames.strings, tagnames.count, sizeof(char *),
 895               (int (*)(const void *, const void *))&tagcompare);
 896
 897         fputs("<h2>Tags</h2><table id=\"branches\"><thead>\n<tr><td>Tag</td>"
 898               "<td>Age</td><td>Commit message</td>"
 899               "<td>Author</td><td>Files</td><td class=\"num\">+</td>"
 900               "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 901
 902         for (i = 0; i < tagnames.count; i++) {
 903                 if (git_revparse_single(&obj, repo, tagnames.strings[i]))
 904                         continue;
 905                 id = git_object_id(obj);
 906                 if (!(ci = commitinfo_getbyoid(id)))
 907                         break;
 908
 909                 relpath = "";
 910
 911                 fputs("<tr><td>", fp);
 912                 xmlencode(fp, tagnames.strings[i], strlen(tagnames.strings[i]));
 913                 fputs("</td><td>", fp);
 914                 if (ci->author)
 915                         printtimeshort(fp, &(ci->author->when));
 916                 fputs("</td><td>", fp);
 917                 if (ci->summary) {
 918                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 919                         if ((len = strlen(ci->summary)) > summarylen) {
 920                                 xmlencode(fp, ci->summary, summarylen - 1);
 921                                 fputs("…", fp);
 922                         } else {
 923                                 xmlencode(fp, ci->summary, len);
 924                         }
 925                         fputs("</a>", fp);
 926                 }
 927                 fputs("</td><td>", fp);
 928                 if (ci->author)
 929                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 930                 fputs("</td><td class=\"num\">", fp);
 931                 fprintf(fp, "%zu", ci->filecount);
 932                 fputs("</td><td class=\"num\">", fp);
 933                 fprintf(fp, "+%zu", ci->addcount);
 934                 fputs("</td><td class=\"num\">", fp);
 935                 fprintf(fp, "-%zu", ci->delcount);
 936                 fputs("</td></tr>\n", fp);
 937
 938                 relpath = "../";
 939
 940                 commitinfo_free(ci);
 941                 git_object_free(obj);
 942         }
 943         fputs("</tbody></table>", fp);
 944         git_strarray_free(&tagnames);
 945
 946         return 0;
 947 }
 948
 949 int
 950 writerefs(FILE *fp)
 951 {
 952         int ret;
 953
 954         if ((ret = writebranches(fp)))
 955                 return ret;
 956         fputs("<br/>", fp);
 957         return writetags(fp);
 958 }
 959
 960 int
 961 main(int argc, char *argv[])
 962 {
 963         git_object *obj = NULL;
 964         git_branch_iterator *it = NULL;
 965         git_branch_t branch;
 966         git_reference *ref = NULL;
 967         const char *branchname = NULL;
 968         const git_error *e = NULL;
 969         FILE *fp, *fpread;
 970         char path[PATH_MAX], *p;
 971         int status;
 972
 973         if (argc != 2) {
 974                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 975                 return 1;
 976         }
 977         repodir = argv[1];
 978
 979         git_libgit2_init();
 980
 981         if ((status = git_repository_open_ext(&repo, repodir,
 982                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 983                 e = giterr_last();
 984                 fprintf(stderr, "error %d/%d: %s\n", status, e->klass, e->message);
 985                 return status;
 986         }
 987
 988         /* use directory name as name */
 989         p = xbasename(repodir);
 990         snprintf(name, sizeof(name), "%s", p);
 991         free(p);
 992
 993         /* read description or .git/description */
 994         snprintf(path, sizeof(path), "%s%s%s",
 995                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
 996         if (!(fpread = fopen(path, "r"))) {
 997                 snprintf(path, sizeof(path), "%s%s%s",
 998                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
 999                 fpread = fopen(path, "r");
1000         }
1001         if (fpread) {
1002                 if (!fgets(description, sizeof(description), fpread))
1003                         description[0] = '\0';
1004                 fclose(fpread);
1005         }
1006
1007         /* read url or .git/url */
1008         snprintf(path, sizeof(path), "%s%s%s",
1009                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
1010         if (!(fpread = fopen(path, "r"))) {
1011                 snprintf(path, sizeof(path), "%s%s%s",
1012                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
1013                 fpread = fopen(path, "r");
1014         }
1015         if (fpread) {
1016                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1017                         cloneurl[0] = '\0';
1018                 fclose(fpread);
1019         }
1020
1021         /* check LICENSE */
1022         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1023         git_object_free(obj);
1024         /* check README */
1025         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1026         git_object_free(obj);
1027
1028         /* log for HEAD */
1029         fp = efopen("log.html", "w");
1030         writeheader(fp);
1031         writelog(fp, "HEAD");
1032         writefooter(fp);
1033         fclose(fp);
1034
1035         /* log for local branches */
1036         if (git_branch_iterator_new(&it, repo, GIT_BRANCH_LOCAL))
1037                 err(1, "git_branch_iterator_new");
1038
1039         while (!git_branch_next(&ref, &branch, it)) {
1040                 if (git_branch_name(&branchname, ref))
1041                         continue;
1042
1043                 snprintf(path, sizeof(path), "log-%s.html", branchname);
1044
1045                 fp = efopen(path, "w");
1046                 writeheader(fp);
1047                 writelog(fp, branchname);
1048                 writefooter(fp);
1049                 fclose(fp);
1050         }
1051         git_reference_free(ref);
1052         git_branch_iterator_free(it);
1053
1054         /* files for HEAD */
1055         fp = efopen("files.html", "w");
1056         writeheader(fp);
1057         writefiles(fp, "HEAD");
1058         writefooter(fp);
1059         fclose(fp);
1060
1061         /* summary page with branches and tags */
1062         fp = efopen("refs.html", "w");
1063         writeheader(fp);
1064         writerefs(fp);
1065         writefooter(fp);
1066         fclose(fp);
1067
1068         /* Atom feed */
1069         fp = efopen("atom.xml", "w");
1070         writeatom(fp);
1071         fclose(fp);
1072
1073         /* cleanup */
1074         git_repository_free(repo);
1075         git_libgit2_shutdown();
1076
1077         return 0;
1078 }