stagit.c

   1 #include <sys/stat.h>
   2
   3 #include <err.h>
   4 #include <errno.h>
   5 #include <inttypes.h>
   6 #include <libgen.h>
   7 #include <limits.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12
  13 #include <git2.h>
  14
  15 #include "compat.h"
  16 #include "config.h"
  17
  18 struct deltainfo {
  19         git_patch *patch;
  20
  21         size_t addcount;
  22         size_t delcount;
  23 };
  24
  25 struct commitinfo {
  26         const git_oid *id;
  27
  28         char oid[GIT_OID_HEXSZ + 1];
  29         char parentoid[GIT_OID_HEXSZ + 1];
  30
  31         const git_signature *author;
  32         const char          *summary;
  33         const char          *msg;
  34
  35         git_diff   *diff;
  36         git_commit *commit;
  37         git_commit *parent;
  38         git_tree   *commit_tree;
  39         git_tree   *parent_tree;
  40
  41         size_t addcount;
  42         size_t delcount;
  43         size_t filecount;
  44
  45         struct deltainfo **deltas;
  46         size_t ndeltas;
  47 };
  48
  49 static git_repository *repo;
  50
  51 static const char *relpath = "";
  52 static const char *repodir;
  53
  54 static char *name = "";
  55 static char *stripped_name;
  56 static char description[255];
  57 static char cloneurl[1024];
  58 static int haslicense, hasreadme, hassubmodules;
  59
  60 void
  61 deltainfo_free(struct deltainfo *di)
  62 {
  63         if (!di)
  64                 return;
  65         git_patch_free(di->patch);
  66         di->patch = NULL;
  67         free(di);
  68 }
  69
  70 int
  71 commitinfo_getstats(struct commitinfo *ci)
  72 {
  73         struct deltainfo *di;
  74         const git_diff_delta *delta;
  75         const git_diff_hunk *hunk;
  76         const git_diff_line *line;
  77         git_patch *patch = NULL;
  78         size_t ndeltas, nhunks, nhunklines;
  79         size_t i, j, k;
  80
  81         ndeltas = git_diff_num_deltas(ci->diff);
  82         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
  83                 err(1, "calloc");
  84
  85         for (i = 0; i < ndeltas; i++) {
  86                 if (!(di = calloc(1, sizeof(struct deltainfo))))
  87                         err(1, "calloc");
  88                 if (git_patch_from_diff(&patch, ci->diff, i)) {
  89                         git_patch_free(patch);
  90                         goto err;
  91                 }
  92                 di->patch = patch;
  93                 ci->deltas[i] = di;
  94
  95                 delta = git_patch_get_delta(patch);
  96
  97                 /* check binary data */
  98                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
  99                         continue;
 100
 101                 nhunks = git_patch_num_hunks(patch);
 102                 for (j = 0; j < nhunks; j++) {
 103                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 104                                 break;
 105                         for (k = 0; ; k++) {
 106                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 107                                         break;
 108                                 if (line->old_lineno == -1) {
 109                                         di->addcount++;
 110                                         ci->addcount++;
 111                                 } else if (line->new_lineno == -1) {
 112                                         di->delcount++;
 113                                         ci->delcount++;
 114                                 }
 115                         }
 116                 }
 117         }
 118         ci->ndeltas = i;
 119         ci->filecount = i;
 120
 121         return 0;
 122
 123 err:
 124         if (ci->deltas)
 125                 for (i = 0; i < ci->ndeltas; i++)
 126                         deltainfo_free(ci->deltas[i]);
 127         free(ci->deltas);
 128         ci->deltas = NULL;
 129         ci->ndeltas = 0;
 130         ci->addcount = 0;
 131         ci->delcount = 0;
 132         ci->filecount = 0;
 133
 134         return -1;
 135 }
 136
 137 void
 138 commitinfo_free(struct commitinfo *ci)
 139 {
 140         size_t i;
 141
 142         if (!ci)
 143                 return;
 144         if (ci->deltas)
 145                 for (i = 0; i < ci->ndeltas; i++)
 146                         deltainfo_free(ci->deltas[i]);
 147         free(ci->deltas);
 148         ci->deltas = NULL;
 149         git_diff_free(ci->diff);
 150         git_tree_free(ci->commit_tree);
 151         git_tree_free(ci->parent_tree);
 152         git_commit_free(ci->commit);
 153 }
 154
 155 struct commitinfo *
 156 commitinfo_getbyoid(const git_oid *id)
 157 {
 158         struct commitinfo *ci;
 159         git_diff_options opts;
 160
 161         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 162                 err(1, "calloc");
 163
 164         if (git_commit_lookup(&(ci->commit), repo, id))
 165                 goto err;
 166         ci->id = id;
 167
 168         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 169         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 170
 171         ci->author = git_commit_author(ci->commit);
 172         ci->summary = git_commit_summary(ci->commit);
 173         ci->msg = git_commit_message(ci->commit);
 174
 175         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 176                 goto err;
 177         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 178                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 179                         ci->parent = NULL;
 180                         ci->parent_tree = NULL;
 181                 }
 182         }
 183
 184         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 185         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 186         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 187                 goto err;
 188         if (commitinfo_getstats(ci) == -1)
 189                 goto err;
 190
 191         return ci;
 192
 193 err:
 194         commitinfo_free(ci);
 195         free(ci);
 196
 197         return NULL;
 198 }
 199
 200 FILE *
 201 efopen(const char *name, const char *flags)
 202 {
 203         FILE *fp;
 204
 205         if (!(fp = fopen(name, flags)))
 206                 err(1, "fopen");
 207
 208         return fp;
 209 }
 210
 211 /* Escape characters below as HTML 2.0 / XML 1.0. */
 212 void
 213 xmlencode(FILE *fp, const char *s, size_t len)
 214 {
 215         size_t i;
 216
 217         for (i = 0; *s && i < len; s++, i++) {
 218                 switch(*s) {
 219                 case '<':  fputs("&lt;",   fp); break;
 220                 case '>':  fputs("&gt;",   fp); break;
 221                 case '\'': fputs("&apos;", fp); break;
 222                 case '&':  fputs("&amp;",  fp); break;
 223                 case '"':  fputs("&quot;", fp); break;
 224                 default:   fputc(*s, fp);
 225                 }
 226         }
 227 }
 228
 229 /* Some implementations of dirname(3) return a pointer to a static
 230  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 231  * This is a wrapper function that is compatible with both versions.
 232  * The program will error out if dirname(3) failed, this can only happen
 233  * with the OpenBSD version. */
 234 char *
 235 xdirname(const char *path)
 236 {
 237         char *p, *b;
 238
 239         if (!(p = strdup(path)))
 240                 err(1, "strdup");
 241         if (!(b = dirname(p)))
 242                 err(1, "dirname");
 243         if (!(b = strdup(b)))
 244                 err(1, "strdup");
 245         free(p);
 246
 247         return b;
 248 }
 249
 250 int
 251 mkdirp(const char *path)
 252 {
 253         char tmp[PATH_MAX], *p;
 254
 255         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 256                 errx(1, "path truncated: '%s'", path);
 257         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 258                 if (*p != '/')
 259                         continue;
 260                 *p = '\0';
 261                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 262                         return -1;
 263                 *p = '/';
 264         }
 265         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 266                 return -1;
 267         return 0;
 268 }
 269
 270 void
 271 printtimeformat(FILE *fp, const git_time *intime, const char *fmt)
 272 {
 273         struct tm *intm;
 274         time_t t;
 275         char out[32];
 276
 277         t = (time_t) intime->time + (intime->offset * 60);
 278         if (!(intm = gmtime(&t)))
 279                 return;
 280         strftime(out, sizeof(out), fmt, intm);
 281         fputs(out, fp);
 282 }
 283
 284 void
 285 printtimez(FILE *fp, const git_time *intime)
 286 {
 287         printtimeformat(fp, intime, "%Y-%m-%dT%H:%M:%SZ");
 288 }
 289
 290 void
 291 printtime(FILE *fp, const git_time *intime)
 292 {
 293         printtimeformat(fp, intime, "%a %b %e %T %Y");
 294 }
 295
 296 void
 297 printtimeshort(FILE *fp, const git_time *intime)
 298 {
 299         printtimeformat(fp, intime, "%Y-%m-%d %H:%M");
 300 }
 301
 302 int
 303 writeheader(FILE *fp, const char *title)
 304 {
 305         fputs("<!DOCTYPE html>\n"
 306                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 307                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 308                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 309         xmlencode(fp, title, strlen(title));
 310         if (title[0] && stripped_name[0])
 311                 fputs(" - ", fp);
 312         xmlencode(fp, stripped_name, strlen(stripped_name));
 313         if (description[0])
 314                 fputs(" - ", fp);
 315         xmlencode(fp, description, strlen(description));
 316         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 317         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 318                 name, relpath);
 319         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 320         fputs("</head>\n<body>\n<table><tr><td>", fp);
 321         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 322                 relpath, relpath);
 323         fputs("</td><td><h1>", fp);
 324         xmlencode(fp, stripped_name, strlen(stripped_name));
 325         fputs("</h1><span class=\"desc\">", fp);
 326         xmlencode(fp, description, strlen(description));
 327         fputs("</span></td></tr>", fp);
 328         if (cloneurl[0]) {
 329                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 330                 xmlencode(fp, cloneurl, strlen(cloneurl));
 331                 fputs("\">", fp);
 332                 xmlencode(fp, cloneurl, strlen(cloneurl));
 333                 fputs("</a></td></tr>", fp);
 334         }
 335         fputs("<tr><td></td><td>\n", fp);
 336         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 337         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 338         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 339         if (hassubmodules)
 340                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 341         if (hasreadme)
 342                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 343         if (haslicense)
 344                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 345         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 346
 347         return 0;
 348 }
 349
 350 int
 351 writefooter(FILE *fp)
 352 {
 353         return !fputs("</div>\n</body>\n</html>\n", fp);
 354 }
 355
 356 int
 357 writeblobhtml(FILE *fp, const git_blob *blob)
 358 {
 359         off_t i;
 360         size_t n = 0;
 361         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 362         const char *s = git_blob_rawcontent(blob);
 363         git_off_t len = git_blob_rawsize(blob);
 364
 365         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 366
 367         if (len) {
 368                 n++;
 369                 fprintf(fp, nfmt, n, n, n);
 370                 for (i = 0; i < len - 1; i++) {
 371                         if (s[i] == '\n') {
 372                                 n++;
 373                                 fprintf(fp, nfmt, n, n, n);
 374                         }
 375                 }
 376         }
 377
 378         fputs("</pre></td><td><pre>\n", fp);
 379         xmlencode(fp, s, (size_t)len);
 380         fputs("</pre></td></tr></table>\n", fp);
 381
 382         return n;
 383 }
 384
 385 void
 386 printcommit(FILE *fp, struct commitinfo *ci)
 387 {
 388         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 389                 relpath, ci->oid, ci->oid);
 390
 391         if (ci->parentoid[0])
 392                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 393                         relpath, ci->parentoid, ci->parentoid);
 394
 395         if (ci->author) {
 396                 fputs("<b>Author:</b> ", fp);
 397                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 398                 fputs(" &lt;<a href=\"mailto:", fp);
 399                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 400                 fputs("\">", fp);
 401                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 402                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 403                 printtime(fp, &(ci->author->when));
 404                 fputc('\n', fp);
 405         }
 406         if (ci->msg) {
 407                 fputc('\n', fp);
 408                 xmlencode(fp, ci->msg, strlen(ci->msg));
 409                 fputc('\n', fp);
 410         }
 411 }
 412
 413 void
 414 printshowfile(FILE *fp, struct commitinfo *ci)
 415 {
 416         const git_diff_delta *delta;
 417         const git_diff_hunk *hunk;
 418         const git_diff_line *line;
 419         git_patch *patch;
 420         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 421         char linestr[80];
 422
 423         printcommit(fp, ci);
 424
 425         if (!ci->deltas)
 426                 return;
 427
 428         if (ci->filecount > 1000   ||
 429             ci->ndeltas   > 1000   ||
 430             ci->addcount  > 100000 ||
 431             ci->delcount  > 100000) {
 432                 fprintf(fp, "(diff is too large, output suppressed)");
 433                 return;
 434         }
 435
 436         /* diff stat */
 437         fputs("<b>Diffstat:</b>\n<table>", fp);
 438         for (i = 0; i < ci->ndeltas; i++) {
 439                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 440                 fputs("<tr><td>", fp);
 441                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 442                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 443                         fputs(" -&gt; ", fp);
 444                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 445                 }
 446
 447                 add = ci->deltas[i]->addcount;
 448                 del = ci->deltas[i]->delcount;
 449                 changed = add + del;
 450                 total = sizeof(linestr) - 2;
 451                 if (changed > total) {
 452                         if (add)
 453                                 add = ((float)total / changed * add) + 1;
 454                         if (del)
 455                                 del = ((float)total / changed * del) + 1;
 456                 }
 457                 memset(&linestr, '+', add);
 458                 memset(&linestr[add], '-', del);
 459
 460                 fprintf(fp, "</td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 461                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 462                 fwrite(&linestr, 1, add, fp);
 463                 fputs("</span><span class=\"d\">", fp);
 464                 fwrite(&linestr[add], 1, del, fp);
 465                 fputs("</span></td></tr>\n", fp);
 466         }
 467         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 468                 ci->filecount, ci->filecount == 1 ? "" : "s",
 469                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 470                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 471
 472         fputs("<hr/>", fp);
 473
 474         for (i = 0; i < ci->ndeltas; i++) {
 475                 patch = ci->deltas[i]->patch;
 476                 delta = git_patch_get_delta(patch);
 477                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 478                         relpath, delta->old_file.path, delta->old_file.path,
 479                         relpath, delta->new_file.path, delta->new_file.path);
 480
 481                 /* check binary data */
 482                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 483                         fputs("Binary files differ\n", fp);
 484                         continue;
 485                 }
 486
 487                 nhunks = git_patch_num_hunks(patch);
 488                 for (j = 0; j < nhunks; j++) {
 489                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 490                                 break;
 491
 492                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 493                         xmlencode(fp, hunk->header, hunk->header_len);
 494                         fputs("</a>", fp);
 495
 496                         for (k = 0; ; k++) {
 497                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 498                                         break;
 499                                 if (line->old_lineno == -1)
 500                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 501                                                 i, j, k, i, j, k);
 502                                 else if (line->new_lineno == -1)
 503                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 504                                                 i, j, k, i, j, k);
 505                                 else
 506                                         fputc(' ', fp);
 507                                 xmlencode(fp, line->content, line->content_len);
 508                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 509                                         fputs("</a>", fp);
 510                         }
 511                 }
 512         }
 513 }
 514
 515 int
 516 writelog(FILE *fp, const git_oid *oid)
 517 {
 518         struct commitinfo *ci;
 519         git_revwalk *w = NULL;
 520         git_oid id;
 521         size_t len;
 522         char path[PATH_MAX];
 523         FILE *fpfile;
 524         int r;
 525
 526         git_revwalk_new(&w, repo);
 527         git_revwalk_push(w, oid);
 528         git_revwalk_sorting(w, GIT_SORT_TIME);
 529         git_revwalk_simplify_first_parent(w);
 530
 531         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
 532                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
 533                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 534
 535         while (!git_revwalk_next(&id, w)) {
 536                 relpath = "";
 537
 538                 if (!(ci = commitinfo_getbyoid(&id)))
 539                         break;
 540
 541                 fputs("<tr><td>", fp);
 542                 if (ci->author)
 543                         printtimeshort(fp, &(ci->author->when));
 544                 fputs("</td><td>", fp);
 545                 if (ci->summary) {
 546                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 547                         if ((len = strlen(ci->summary)) > summarylen) {
 548                                 xmlencode(fp, ci->summary, summarylen - 1);
 549                                 fputs("…", fp);
 550                         } else {
 551                                 xmlencode(fp, ci->summary, len);
 552                         }
 553                         fputs("</a>", fp);
 554                 }
 555                 fputs("</td><td>", fp);
 556                 if (ci->author)
 557                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 558                 fputs("</td><td class=\"num\">", fp);
 559                 fprintf(fp, "%zu", ci->filecount);
 560                 fputs("</td><td class=\"num\">", fp);
 561                 fprintf(fp, "+%zu", ci->addcount);
 562                 fputs("</td><td class=\"num\">", fp);
 563                 fprintf(fp, "-%zu", ci->delcount);
 564                 fputs("</td></tr>\n", fp);
 565
 566                 relpath = "../";
 567
 568                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 569                 if (r == -1 || (size_t)r >= sizeof(path))
 570                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 571
 572                 /* check if file exists if so skip it */
 573                 if (access(path, F_OK)) {
 574                         fpfile = efopen(path, "w");
 575                         writeheader(fpfile, ci->summary);
 576                         fputs("<pre>", fpfile);
 577                         printshowfile(fpfile, ci);
 578                         fputs("</pre>\n", fpfile);
 579                         writefooter(fpfile);
 580                         fclose(fpfile);
 581                 }
 582                 commitinfo_free(ci);
 583         }
 584         fputs("</tbody></table>", fp);
 585
 586         git_revwalk_free(w);
 587
 588         relpath = "";
 589
 590         return 0;
 591 }
 592
 593 void
 594 printcommitatom(FILE *fp, struct commitinfo *ci)
 595 {
 596         fputs("<entry>\n", fp);
 597
 598         fprintf(fp, "<id>%s</id>\n", ci->oid);
 599         if (ci->author) {
 600                 fputs("<updated>", fp);
 601                 printtimez(fp, &(ci->author->when));
 602                 fputs("</updated>\n", fp);
 603         }
 604         if (ci->summary) {
 605                 fputs("<title type=\"text\">", fp);
 606                 xmlencode(fp, ci->summary, strlen(ci->summary));
 607                 fputs("</title>\n", fp);
 608         }
 609         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 610                 ci->oid);
 611
 612         if (ci->author) {
 613                 fputs("<author><name>", fp);
 614                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 615                 fputs("</name>\n<email>", fp);
 616                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 617                 fputs("</email>\n</author>\n", fp);
 618         }
 619
 620         fputs("<content type=\"text\">", fp);
 621         fprintf(fp, "commit %s\n", ci->oid);
 622         if (ci->parentoid[0])
 623                 fprintf(fp, "parent %s\n", ci->parentoid);
 624         if (ci->author) {
 625                 fputs("Author: ", fp);
 626                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 627                 fputs(" &lt;", fp);
 628                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 629                 fputs("&gt;\nDate:   ", fp);
 630                 printtime(fp, &(ci->author->when));
 631                 fputc('\n', fp);
 632         }
 633         if (ci->msg) {
 634                 fputc('\n', fp);
 635                 xmlencode(fp, ci->msg, strlen(ci->msg));
 636         }
 637         fputs("\n</content>\n", fp);
 638
 639         fputs("</entry>\n", fp);
 640 }
 641
 642 int
 643 writeatom(FILE *fp)
 644 {
 645         struct commitinfo *ci;
 646         git_revwalk *w = NULL;
 647         git_oid id;
 648         size_t i, m = 100; /* last 'm' commits */
 649
 650         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 651               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 652         xmlencode(fp, stripped_name, strlen(stripped_name));
 653         fputs(", branch HEAD</title>\n<subtitle>", fp);
 654         xmlencode(fp, description, strlen(description));
 655         fputs("</subtitle>\n", fp);
 656
 657         git_revwalk_new(&w, repo);
 658         git_revwalk_push_head(w);
 659         git_revwalk_sorting(w, GIT_SORT_TIME);
 660         git_revwalk_simplify_first_parent(w);
 661
 662         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 663                 if (!(ci = commitinfo_getbyoid(&id)))
 664                         break;
 665                 printcommitatom(fp, ci);
 666                 commitinfo_free(ci);
 667         }
 668         git_revwalk_free(w);
 669
 670         fputs("</feed>", fp);
 671
 672         return 0;
 673 }
 674
 675 int
 676 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 677 {
 678         char tmp[PATH_MAX] = "", *d;
 679         const char *p;
 680         int lc = 0;
 681         FILE *fp;
 682
 683         d = xdirname(fpath);
 684         if (mkdirp(d)) {
 685                 free(d);
 686                 return -1;
 687         }
 688         free(d);
 689
 690         p = fpath;
 691         while (*p) {
 692                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 693                         errx(1, "path truncated: '../%s'", tmp);
 694                 p++;
 695         }
 696         relpath = tmp;
 697
 698         fp = efopen(fpath, "w");
 699         writeheader(fp, filename);
 700         fputs("<p> ", fp);
 701         xmlencode(fp, filename, strlen(filename));
 702         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 703         fputs("</p><hr/>", fp);
 704
 705         if (git_blob_is_binary((git_blob *)obj)) {
 706                 fputs("<p>Binary file</p>\n", fp);
 707         } else {
 708                 lc = writeblobhtml(fp, (git_blob *)obj);
 709                 if (ferror(fp))
 710                         err(1, "fwrite");
 711         }
 712         writefooter(fp);
 713         fclose(fp);
 714
 715         relpath = "";
 716
 717         return lc;
 718 }
 719
 720 const char *
 721 filemode(git_filemode_t m)
 722 {
 723         static char mode[11];
 724
 725         memset(mode, '-', sizeof(mode) - 1);
 726         mode[10] = '\0';
 727
 728         if (S_ISREG(m))
 729                 mode[0] = '-';
 730         else if (S_ISBLK(m))
 731                 mode[0] = 'b';
 732         else if (S_ISCHR(m))
 733                 mode[0] = 'c';
 734         else if (S_ISDIR(m))
 735                 mode[0] = 'd';
 736         else if (S_ISFIFO(m))
 737                 mode[0] = 'p';
 738         else if (S_ISLNK(m))
 739                 mode[0] = 'l';
 740         else if (S_ISSOCK(m))
 741                 mode[0] = 's';
 742         else
 743                 mode[0] = '?';
 744
 745         if (m & S_IRUSR) mode[1] = 'r';
 746         if (m & S_IWUSR) mode[2] = 'w';
 747         if (m & S_IXUSR) mode[3] = 'x';
 748         if (m & S_IRGRP) mode[4] = 'r';
 749         if (m & S_IWGRP) mode[5] = 'w';
 750         if (m & S_IXGRP) mode[6] = 'x';
 751         if (m & S_IROTH) mode[7] = 'r';
 752         if (m & S_IWOTH) mode[8] = 'w';
 753         if (m & S_IXOTH) mode[9] = 'x';
 754
 755         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 756         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 757         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 758
 759         return mode;
 760 }
 761
 762 int
 763 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 764 {
 765         const git_tree_entry *entry = NULL;
 766         git_submodule *module = NULL;
 767         git_object *obj = NULL;
 768         git_off_t filesize;
 769         const char *entryname;
 770         char filepath[PATH_MAX], entrypath[PATH_MAX];
 771         size_t count, i;
 772         int lc, r, ret;
 773
 774         count = git_tree_entrycount(tree);
 775         for (i = 0; i < count; i++) {
 776                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 777                     !(entryname = git_tree_entry_name(entry)))
 778                         return -1;
 779                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 780                          path, path[0] ? "/" : "", entryname);
 781                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 782                         errx(1, "path truncated: '%s%s%s'",
 783                                 path, path[0] ? "/" : "", entryname);
 784
 785                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 786                          path, path[0] ? "/" : "", entryname);
 787                 if (r == -1 || (size_t)r >= sizeof(filepath))
 788                         errx(1, "path truncated: 'file/%s%s%s.html'",
 789                                 path, path[0] ? "/" : "", entryname);
 790
 791                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 792                         switch (git_object_type(obj)) {
 793                         case GIT_OBJ_BLOB:
 794                                 break;
 795                         case GIT_OBJ_TREE:
 796                                 /* NOTE: recurses */
 797                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 798                                                      entrypath);
 799                                 git_object_free(obj);
 800                                 if (ret)
 801                                         return ret;
 802                                 continue;
 803                         default:
 804                                 git_object_free(obj);
 805                                 continue;
 806                         }
 807
 808                         filesize = git_blob_rawsize((git_blob *)obj);
 809                         lc = writeblob(obj, filepath, entryname, filesize);
 810
 811                         fputs("<tr><td>", fp);
 812                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 813                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 814                         xmlencode(fp, entrypath, strlen(entrypath));
 815                         fputs("</a></td><td class=\"num\">", fp);
 816                         if (showlinecount && lc > 0)
 817                                 fprintf(fp, "%dL", lc);
 818                         else
 819                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 820                         fputs("</td></tr>\n", fp);
 821                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 822                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 823                                 relpath);
 824                         xmlencode(fp, entrypath, strlen(entrypath));
 825                         git_submodule_free(module);
 826                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 827                 }
 828         }
 829
 830         return 0;
 831 }
 832
 833 int
 834 writefiles(FILE *fp, const git_oid *id, const char *branch)
 835 {
 836         git_tree *tree = NULL;
 837         git_commit *commit = NULL;
 838         int ret = -1;
 839
 840         fputs("<table id=\"files\"><thead>\n<tr>"
 841               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 842               "</tr>\n</thead><tbody>\n", fp);
 843
 844         if (git_commit_lookup(&commit, repo, id) ||
 845             git_commit_tree(&tree, commit))
 846                 goto err;
 847         ret = writefilestree(fp, tree, branch, "");
 848
 849 err:
 850         fputs("</tbody></table>", fp);
 851
 852         git_commit_free(commit);
 853         git_tree_free(tree);
 854
 855         return ret;
 856 }
 857
 858 int
 859 refs_cmp(const void *v1, const void *v2)
 860 {
 861         git_reference *r1 = (*(git_reference **)v1);
 862         git_reference *r2 = (*(git_reference **)v2);
 863         int t1, t2;
 864
 865         t1 = git_reference_is_branch(r1);
 866         t2 = git_reference_is_branch(r2);
 867
 868         if (t1 != t2)
 869                 return t1 - t2;
 870
 871         return strcmp(git_reference_shorthand(r1),
 872                       git_reference_shorthand(r2));
 873 }
 874
 875 int
 876 writerefs(FILE *fp)
 877 {
 878         struct commitinfo *ci;
 879         const git_oid *id = NULL;
 880         git_object *obj = NULL;
 881         git_reference *dref = NULL, *r, *ref = NULL;
 882         git_reference_iterator *it = NULL;
 883         git_reference **refs = NULL;
 884         size_t count, i, j, refcount;
 885         const char *titles[] = { "Branches", "Tags" };
 886         const char *ids[] = { "branches", "tags" };
 887         const char *name;
 888
 889         if (git_reference_iterator_new(&it, repo))
 890                 return -1;
 891
 892         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 893                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 894                         err(1, "realloc");
 895                 refs[refcount] = ref;
 896         }
 897         git_reference_iterator_free(it);
 898
 899         /* sort by type then shorthand name */
 900         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 901
 902         for (j = 0; j < 2; j++) {
 903                 for (i = 0, count = 0; i < refcount; i++) {
 904                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 905                             !(git_reference_is_tag(refs[i]) && j == 1))
 906                                 continue;
 907
 908                         switch (git_reference_type(refs[i])) {
 909                         case GIT_REF_SYMBOLIC:
 910                                 if (git_reference_resolve(&dref, refs[i]))
 911                                         goto err;
 912                                 r = dref;
 913                                 break;
 914                         case GIT_REF_OID:
 915                                 r = refs[i];
 916                                 break;
 917                         default:
 918                                 continue;
 919                         }
 920                         if (!(id = git_reference_target(r)))
 921                                 goto err;
 922                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 923                                 goto err;
 924                         if (!(id = git_object_id(obj)))
 925                                 goto err;
 926                         if (!(ci = commitinfo_getbyoid(id)))
 927                                 break;
 928
 929                         /* print header if it has an entry (first). */
 930                         if (++count == 1) {
 931                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 932                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 933                                       titles[j], ids[j]);
 934                         }
 935
 936                         relpath = "";
 937                         name = git_reference_shorthand(r);
 938
 939                         fputs("<tr><td>", fp);
 940                         xmlencode(fp, name, strlen(name));
 941                         fputs("</td><td>", fp);
 942                         if (ci->author)
 943                                 printtimeshort(fp, &(ci->author->when));
 944                         fputs("</td><td>", fp);
 945                         if (ci->author)
 946                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 947                         fputs("</td></tr>\n", fp);
 948
 949                         relpath = "../";
 950
 951                         commitinfo_free(ci);
 952                         git_object_free(obj);
 953                         obj = NULL;
 954                         git_reference_free(dref);
 955                         dref = NULL;
 956                 }
 957                 /* table footer */
 958                 if (count)
 959                         fputs("</tbody></table><br/>", fp);
 960         }
 961
 962 err:
 963         git_object_free(obj);
 964         git_reference_free(dref);
 965
 966         for (i = 0; i < refcount; i++)
 967                 git_reference_free(refs[i]);
 968         free(refs);
 969
 970         return 0;
 971 }
 972
 973 int
 974 main(int argc, char *argv[])
 975 {
 976         git_object *obj = NULL;
 977         const git_oid *head = NULL;
 978         const git_error *e = NULL;
 979         FILE *fp, *fpread;
 980         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
 981         int r, status;
 982
 983         if (argc != 2) {
 984                 fprintf(stderr, "%s <repodir>\n", argv[0]);
 985                 return 1;
 986         }
 987         repodir = argv[1];
 988         if (!realpath(repodir, repodirabs))
 989                 err(1, "realpath");
 990
 991         git_libgit2_init();
 992
 993         if ((status = git_repository_open_ext(&repo, repodir,
 994                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
 995                 e = giterr_last();
 996                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
 997                 return status;
 998         }
 999
1000         /* find HEAD */
1001         if (git_revparse_single(&obj, repo, "HEAD"))
1002                 return 1;
1003         head = git_object_id(obj);
1004         git_object_free(obj);
1005
1006         /* use directory name as name */
1007         if ((name = strrchr(repodirabs, '/')))
1008                 name++;
1009         else
1010                 name = "";
1011
1012         /* strip .git suffix */
1013         if (!(stripped_name = strdup(name)))
1014                 err(1, "strdup");
1015         if ((p = strrchr(stripped_name, '.')))
1016                 if (!strcmp(p, ".git"))
1017                         *p = '\0';
1018
1019         /* read description or .git/description */
1020         r = snprintf(path, sizeof(path), "%s%s%s",
1021                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
1022         if (r == -1 || (size_t)r >= sizeof(path))
1023                 errx(1, "path truncated: '%s%s%s'",
1024                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "description");
1025         if (!(fpread = fopen(path, "r"))) {
1026                 r = snprintf(path, sizeof(path), "%s%s%s",
1027                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
1028                 if (r == -1 || (size_t)r >= sizeof(path))
1029                         errx(1, "path truncated: '%s%s%s'",
1030                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/description");
1031                 fpread = fopen(path, "r");
1032         }
1033         if (fpread) {
1034                 if (!fgets(description, sizeof(description), fpread))
1035                         description[0] = '\0';
1036                 fclose(fpread);
1037         }
1038
1039         /* read url or .git/url */
1040         r = snprintf(path, sizeof(path), "%s%s%s",
1041                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
1042         if (r == -1 || (size_t)r >= sizeof(path))
1043                 errx(1, "path truncated: '%s%s%s'",
1044                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", "url");
1045         if (!(fpread = fopen(path, "r"))) {
1046                 r = snprintf(path, sizeof(path), "%s%s%s",
1047                         repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
1048                 if (r == -1 || (size_t)r >= sizeof(path))
1049                         errx(1, "path truncated: '%s%s%s'",
1050                                 repodir, repodir[strlen(repodir)] == '/' ? "" : "/", ".git/url");
1051                 fpread = fopen(path, "r");
1052         }
1053         if (fpread) {
1054                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1055                         cloneurl[0] = '\0';
1056                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1057                 fclose(fpread);
1058         }
1059
1060         /* check LICENSE */
1061         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1062         git_object_free(obj);
1063         /* check README */
1064         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1065         git_object_free(obj);
1066         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
1067         git_object_free(obj);
1068
1069         /* log for HEAD */
1070         fp = efopen("log.html", "w");
1071         relpath = "";
1072         writeheader(fp, "Log");
1073         mkdir("commit", 0755);
1074         writelog(fp, head);
1075         writefooter(fp);
1076         fclose(fp);
1077
1078         /* files for HEAD */
1079         fp = efopen("files.html", "w");
1080         writeheader(fp, "Files");
1081         writefiles(fp, head, "HEAD");
1082         writefooter(fp);
1083         fclose(fp);
1084
1085         /* summary page with branches and tags */
1086         fp = efopen("refs.html", "w");
1087         writeheader(fp, "Refs");
1088         writerefs(fp);
1089         writefooter(fp);
1090         fclose(fp);
1091
1092         /* Atom feed */
1093         fp = efopen("atom.xml", "w");
1094         writeatom(fp);
1095         fclose(fp);
1096
1097         /* cleanup */
1098         git_repository_free(repo);
1099         git_libgit2_shutdown();
1100
1101         return 0;
1102 }