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