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
  17 struct deltainfo {
  18         git_patch *patch;
  19
  20         size_t addcount;
  21         size_t delcount;
  22 };
  23
  24 struct commitinfo {
  25         const git_oid *id;
  26
  27         char oid[GIT_OID_HEXSZ + 1];
  28         char parentoid[GIT_OID_HEXSZ + 1];
  29
  30         const git_signature *author;
  31         const git_signature *committer;
  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 /* summary length (bytes) in the log */
  50 static const unsigned summarylen = 70;
  51 /* display line count or file size in file tree index */
  52 static const int showlinecount = 1;
  53
  54 static git_repository *repo;
  55
  56 static const char *relpath = "";
  57 static const char *repodir;
  58
  59 static char *name = "";
  60 static char *strippedname;
  61 static char description[255];
  62 static char cloneurl[1024];
  63 static int haslicense, hasreadme, hassubmodules;
  64
  65 /* cache */
  66 static git_oid lastoid;
  67 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  68 static FILE *rcachefp, *wcachefp;
  69 static const char *cachefile;
  70
  71 #ifndef USE_PLEDGE
  72 int
  73 pledge(const char *promises, const char *paths[])
  74 {
  75         return 0;
  76 }
  77 #endif
  78
  79 void
  80 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  81 {
  82         int r;
  83
  84         r = snprintf(buf, bufsiz, "%s%s%s",
  85                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  86         if (r == -1 || (size_t)r >= bufsiz)
  87                 errx(1, "path truncated: '%s%s%s'",
  88                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  89 }
  90
  91 void
  92 deltainfo_free(struct deltainfo *di)
  93 {
  94         if (!di)
  95                 return;
  96         git_patch_free(di->patch);
  97         di->patch = NULL;
  98         free(di);
  99 }
 100
 101 int
 102 commitinfo_getstats(struct commitinfo *ci)
 103 {
 104         struct deltainfo *di;
 105         const git_diff_delta *delta;
 106         const git_diff_hunk *hunk;
 107         const git_diff_line *line;
 108         git_patch *patch = NULL;
 109         size_t ndeltas, nhunks, nhunklines;
 110         size_t i, j, k;
 111
 112         ndeltas = git_diff_num_deltas(ci->diff);
 113         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 114                 err(1, "calloc");
 115
 116         for (i = 0; i < ndeltas; i++) {
 117                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 118                         err(1, "calloc");
 119                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 120                         git_patch_free(patch);
 121                         goto err;
 122                 }
 123                 di->patch = patch;
 124                 ci->deltas[i] = di;
 125
 126                 delta = git_patch_get_delta(patch);
 127
 128                 /* skip stats for binary data */
 129                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 130                         continue;
 131
 132                 nhunks = git_patch_num_hunks(patch);
 133                 for (j = 0; j < nhunks; j++) {
 134                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 135                                 break;
 136                         for (k = 0; ; k++) {
 137                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 138                                         break;
 139                                 if (line->old_lineno == -1) {
 140                                         di->addcount++;
 141                                         ci->addcount++;
 142                                 } else if (line->new_lineno == -1) {
 143                                         di->delcount++;
 144                                         ci->delcount++;
 145                                 }
 146                         }
 147                 }
 148         }
 149         ci->ndeltas = i;
 150         ci->filecount = i;
 151
 152         return 0;
 153
 154 err:
 155         if (ci->deltas)
 156                 for (i = 0; i < ci->ndeltas; i++)
 157                         deltainfo_free(ci->deltas[i]);
 158         free(ci->deltas);
 159         ci->deltas = NULL;
 160         ci->ndeltas = 0;
 161         ci->addcount = 0;
 162         ci->delcount = 0;
 163         ci->filecount = 0;
 164
 165         return -1;
 166 }
 167
 168 void
 169 commitinfo_free(struct commitinfo *ci)
 170 {
 171         size_t i;
 172
 173         if (!ci)
 174                 return;
 175         if (ci->deltas)
 176                 for (i = 0; i < ci->ndeltas; i++)
 177                         deltainfo_free(ci->deltas[i]);
 178         free(ci->deltas);
 179         ci->deltas = NULL;
 180         git_diff_free(ci->diff);
 181         git_tree_free(ci->commit_tree);
 182         git_tree_free(ci->parent_tree);
 183         git_commit_free(ci->commit);
 184 }
 185
 186 struct commitinfo *
 187 commitinfo_getbyoid(const git_oid *id)
 188 {
 189         struct commitinfo *ci;
 190         git_diff_options opts;
 191
 192         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 193                 err(1, "calloc");
 194
 195         if (git_commit_lookup(&(ci->commit), repo, id))
 196                 goto err;
 197         ci->id = id;
 198
 199         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 200         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 201
 202         ci->author = git_commit_author(ci->commit);
 203         ci->committer = git_commit_committer(ci->commit);
 204         ci->summary = git_commit_summary(ci->commit);
 205         ci->msg = git_commit_message(ci->commit);
 206
 207         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 208                 goto err;
 209         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 210                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 211                         ci->parent = NULL;
 212                         ci->parent_tree = NULL;
 213                 }
 214         }
 215
 216         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 217         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 218         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 219                 goto err;
 220         if (commitinfo_getstats(ci) == -1)
 221                 goto err;
 222
 223         return ci;
 224
 225 err:
 226         commitinfo_free(ci);
 227         free(ci);
 228
 229         return NULL;
 230 }
 231
 232 FILE *
 233 efopen(const char *name, const char *flags)
 234 {
 235         FILE *fp;
 236
 237         if (!(fp = fopen(name, flags)))
 238                 err(1, "fopen");
 239
 240         return fp;
 241 }
 242
 243 /* Escape characters below as HTML 2.0 / XML 1.0. */
 244 void
 245 xmlencode(FILE *fp, const char *s, size_t len)
 246 {
 247         size_t i;
 248
 249         for (i = 0; *s && i < len; s++, i++) {
 250                 switch(*s) {
 251                 case '<':  fputs("&lt;",   fp); break;
 252                 case '>':  fputs("&gt;",   fp); break;
 253                 case '\'': fputs("&apos;", fp); break;
 254                 case '&':  fputs("&amp;",  fp); break;
 255                 case '"':  fputs("&quot;", fp); break;
 256                 default:   fputc(*s, fp);
 257                 }
 258         }
 259 }
 260
 261 int
 262 mkdirp(const char *path)
 263 {
 264         char tmp[PATH_MAX], *p;
 265
 266         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 267                 errx(1, "path truncated: '%s'", path);
 268         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 269                 if (*p != '/')
 270                         continue;
 271                 *p = '\0';
 272                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 273                         return -1;
 274                 *p = '/';
 275         }
 276         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 277                 return -1;
 278         return 0;
 279 }
 280
 281 void
 282 printtimez(FILE *fp, const git_time *intime)
 283 {
 284         struct tm *intm;
 285         time_t t;
 286         char out[32];
 287
 288         t = (time_t)intime->time;
 289         if (!(intm = gmtime(&t)))
 290                 return;
 291         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 292         fputs(out, fp);
 293 }
 294
 295 void
 296 printtime(FILE *fp, const git_time *intime)
 297 {
 298         struct tm *intm;
 299         time_t t;
 300         char out[32];
 301
 302         t = (time_t)intime->time + (intime->offset * 60);
 303         if (!(intm = gmtime(&t)))
 304                 return;
 305         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 306         if (intime->offset < 0)
 307                 fprintf(fp, "%s -%02d%02d", out,
 308                             -(intime->offset) / 60, -(intime->offset) % 60);
 309         else
 310                 fprintf(fp, "%s +%02d%02d", out,
 311                             intime->offset / 60, intime->offset % 60);
 312 }
 313
 314 void
 315 printtimeshort(FILE *fp, const git_time *intime)
 316 {
 317         struct tm *intm;
 318         time_t t;
 319         char out[32];
 320
 321         t = (time_t)intime->time;
 322         if (!(intm = gmtime(&t)))
 323                 return;
 324         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 325         fputs(out, fp);
 326 }
 327
 328 void
 329 writeheader(FILE *fp, const char *title)
 330 {
 331         fputs("<!DOCTYPE html>\n"
 332                 "<html>\n<head>\n"
 333                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 334                 "<title>", fp);
 335         xmlencode(fp, title, strlen(title));
 336         if (title[0] && strippedname[0])
 337                 fputs(" - ", fp);
 338         xmlencode(fp, strippedname, strlen(strippedname));
 339         if (description[0])
 340                 fputs(" - ", fp);
 341         xmlencode(fp, description, strlen(description));
 342         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 343         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 344                 name, relpath);
 345         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 346         fputs("</head>\n<body>\n<table><tr><td>", fp);
 347         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 348                 relpath, relpath);
 349         fputs("</td><td><h1>", fp);
 350         xmlencode(fp, strippedname, strlen(strippedname));
 351         fputs("</h1><span class=\"desc\">", fp);
 352         xmlencode(fp, description, strlen(description));
 353         fputs("</span></td></tr>", fp);
 354         if (cloneurl[0]) {
 355                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 356                 xmlencode(fp, cloneurl, strlen(cloneurl));
 357                 fputs("\">", fp);
 358                 xmlencode(fp, cloneurl, strlen(cloneurl));
 359                 fputs("</a></td></tr>", fp);
 360         }
 361         fputs("<tr><td></td><td>\n", fp);
 362         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 363         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 364         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 365         if (hassubmodules)
 366                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 367         if (hasreadme)
 368                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 369         if (haslicense)
 370                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 371         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 372 }
 373
 374 void
 375 writefooter(FILE *fp)
 376 {
 377         fputs("</div>\n</body>\n</html>\n", fp);
 378 }
 379
 380 int
 381 writeblobhtml(FILE *fp, const git_blob *blob)
 382 {
 383         off_t i;
 384         size_t n = 0;
 385         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 386         const char *s = git_blob_rawcontent(blob);
 387         git_off_t len = git_blob_rawsize(blob);
 388
 389         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 390
 391         if (len) {
 392                 n++;
 393                 fprintf(fp, nfmt, n, n, n);
 394                 for (i = 0; i < len - 1; i++) {
 395                         if (s[i] == '\n') {
 396                                 n++;
 397                                 fprintf(fp, nfmt, n, n, n);
 398                         }
 399                 }
 400         }
 401
 402         fputs("</pre></td><td><pre>\n", fp);
 403         xmlencode(fp, s, (size_t)len);
 404         fputs("</pre></td></tr></table>\n", fp);
 405
 406         return n;
 407 }
 408
 409 void
 410 printcommit(FILE *fp, struct commitinfo *ci)
 411 {
 412         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 413                 relpath, ci->oid, ci->oid);
 414
 415         if (ci->parentoid[0])
 416                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 417                         relpath, ci->parentoid, ci->parentoid);
 418
 419         if (ci->author) {
 420                 fputs("<b>Author:</b> ", fp);
 421                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 422                 fputs(" &lt;<a href=\"mailto:", fp);
 423                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 424                 fputs("\">", fp);
 425                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 426                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 427                 printtime(fp, &(ci->author->when));
 428                 fputc('\n', fp);
 429         }
 430         if (ci->msg) {
 431                 fputc('\n', fp);
 432                 xmlencode(fp, ci->msg, strlen(ci->msg));
 433                 fputc('\n', fp);
 434         }
 435 }
 436
 437 void
 438 printshowfile(FILE *fp, struct commitinfo *ci)
 439 {
 440         const git_diff_delta *delta;
 441         const git_diff_hunk *hunk;
 442         const git_diff_line *line;
 443         git_patch *patch;
 444         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 445         char linestr[80];
 446
 447         printcommit(fp, ci);
 448
 449         if (!ci->deltas)
 450                 return;
 451
 452         if (ci->filecount > 1000   ||
 453             ci->ndeltas   > 1000   ||
 454             ci->addcount  > 100000 ||
 455             ci->delcount  > 100000) {
 456                 fputs("Diff is too large, output suppressed.\n", fp);
 457                 return;
 458         }
 459
 460         /* diff stat */
 461         fputs("<b>Diffstat:</b>\n<table>", fp);
 462         for (i = 0; i < ci->ndeltas; i++) {
 463                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 464                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 465                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 466                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 467                         fputs(" -&gt; ", fp);
 468                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 469                 }
 470
 471                 add = ci->deltas[i]->addcount;
 472                 del = ci->deltas[i]->delcount;
 473                 changed = add + del;
 474                 total = sizeof(linestr) - 2;
 475                 if (changed > total) {
 476                         if (add)
 477                                 add = ((float)total / changed * add) + 1;
 478                         if (del)
 479                                 del = ((float)total / changed * del) + 1;
 480                 }
 481                 memset(&linestr, '+', add);
 482                 memset(&linestr[add], '-', del);
 483
 484                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 485                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 486                 fwrite(&linestr, 1, add, fp);
 487                 fputs("</span><span class=\"d\">", fp);
 488                 fwrite(&linestr[add], 1, del, fp);
 489                 fputs("</span></td></tr>\n", fp);
 490         }
 491         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 492                 ci->filecount, ci->filecount == 1 ? "" : "s",
 493                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 494                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 495
 496         fputs("<hr/>", fp);
 497
 498         for (i = 0; i < ci->ndeltas; i++) {
 499                 patch = ci->deltas[i]->patch;
 500                 delta = git_patch_get_delta(patch);
 501                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 502                         i, relpath, delta->old_file.path, delta->old_file.path,
 503                         relpath, delta->new_file.path, delta->new_file.path);
 504
 505                 /* check binary data */
 506                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 507                         fputs("Binary files differ.\n", fp);
 508                         continue;
 509                 }
 510
 511                 nhunks = git_patch_num_hunks(patch);
 512                 for (j = 0; j < nhunks; j++) {
 513                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 514                                 break;
 515
 516                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 517                         xmlencode(fp, hunk->header, hunk->header_len);
 518                         fputs("</a>", fp);
 519
 520                         for (k = 0; ; k++) {
 521                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 522                                         break;
 523                                 if (line->old_lineno == -1)
 524                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 525                                                 i, j, k, i, j, k);
 526                                 else if (line->new_lineno == -1)
 527                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 528                                                 i, j, k, i, j, k);
 529                                 else
 530                                         fputc(' ', fp);
 531                                 xmlencode(fp, line->content, line->content_len);
 532                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 533                                         fputs("</a>", fp);
 534                         }
 535                 }
 536         }
 537 }
 538
 539 void
 540 writelogline(FILE *fp, struct commitinfo *ci)
 541 {
 542         size_t len;
 543
 544         fputs("<tr><td>", fp);
 545         if (ci->author)
 546                 printtimeshort(fp, &(ci->author->when));
 547         fputs("</td><td>", fp);
 548         if (ci->summary) {
 549                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 550                 if ((len = strlen(ci->summary)) > summarylen) {
 551                         xmlencode(fp, ci->summary, summarylen - 1);
 552                         fputs("…", fp);
 553                 } else {
 554                         xmlencode(fp, ci->summary, len);
 555                 }
 556                 fputs("</a>", fp);
 557         }
 558         fputs("</td><td>", fp);
 559         if (ci->author)
 560                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 561         fputs("</td><td class=\"num\">", fp);
 562         fprintf(fp, "%zu", ci->filecount);
 563         fputs("</td><td class=\"num\">", fp);
 564         fprintf(fp, "+%zu", ci->addcount);
 565         fputs("</td><td class=\"num\">", fp);
 566         fprintf(fp, "-%zu", ci->delcount);
 567         fputs("</td></tr>\n", fp);
 568 }
 569
 570 int
 571 writelog(FILE *fp, const git_oid *oid)
 572 {
 573         struct commitinfo *ci;
 574         git_revwalk *w = NULL;
 575         git_oid id;
 576         char path[PATH_MAX];
 577         FILE *fpfile;
 578         int r;
 579
 580         git_revwalk_new(&w, repo);
 581         git_revwalk_push(w, oid);
 582         git_revwalk_sorting(w, GIT_SORT_TIME);
 583         git_revwalk_simplify_first_parent(w);
 584
 585         while (!git_revwalk_next(&id, w)) {
 586                 relpath = "";
 587
 588                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 589                         break;
 590                 if (!(ci = commitinfo_getbyoid(&id)))
 591                         break;
 592
 593                 writelogline(fp, ci);
 594                 if (cachefile)
 595                         writelogline(wcachefp, ci);
 596
 597                 relpath = "../";
 598
 599                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 600                 if (r == -1 || (size_t)r >= sizeof(path))
 601                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 602
 603                 /* check if file exists if so skip it */
 604                 if (access(path, F_OK)) {
 605                         fpfile = efopen(path, "w");
 606                         writeheader(fpfile, ci->summary);
 607                         fputs("<pre>", fpfile);
 608                         printshowfile(fpfile, ci);
 609                         fputs("</pre>\n", fpfile);
 610                         writefooter(fpfile);
 611                         fclose(fpfile);
 612                 }
 613                 commitinfo_free(ci);
 614         }
 615         git_revwalk_free(w);
 616
 617         relpath = "";
 618
 619         return 0;
 620 }
 621
 622 void
 623 printcommitatom(FILE *fp, struct commitinfo *ci)
 624 {
 625         fputs("<entry>\n", fp);
 626
 627         fprintf(fp, "<id>%s</id>\n", ci->oid);
 628         if (ci->author) {
 629                 fputs("<published>", fp);
 630                 printtimez(fp, &(ci->author->when));
 631                 fputs("</published>\n", fp);
 632         }
 633         if (ci->committer) {
 634                 fputs("<updated>", fp);
 635                 printtimez(fp, &(ci->committer->when));
 636                 fputs("</updated>\n", fp);
 637         }
 638         if (ci->summary) {
 639                 fputs("<title type=\"text\">", fp);
 640                 xmlencode(fp, ci->summary, strlen(ci->summary));
 641                 fputs("</title>\n", fp);
 642         }
 643         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 644                 ci->oid);
 645
 646         if (ci->author) {
 647                 fputs("<author><name>", fp);
 648                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 649                 fputs("</name>\n<email>", fp);
 650                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 651                 fputs("</email>\n</author>\n", fp);
 652         }
 653
 654         fputs("<content type=\"text\">", fp);
 655         fprintf(fp, "commit %s\n", ci->oid);
 656         if (ci->parentoid[0])
 657                 fprintf(fp, "parent %s\n", ci->parentoid);
 658         if (ci->author) {
 659                 fputs("Author: ", fp);
 660                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 661                 fputs(" &lt;", fp);
 662                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 663                 fputs("&gt;\nDate:   ", fp);
 664                 printtime(fp, &(ci->author->when));
 665                 fputc('\n', fp);
 666         }
 667         if (ci->msg) {
 668                 fputc('\n', fp);
 669                 xmlencode(fp, ci->msg, strlen(ci->msg));
 670         }
 671         fputs("\n</content>\n</entry>\n", fp);
 672 }
 673
 674 int
 675 writeatom(FILE *fp)
 676 {
 677         struct commitinfo *ci;
 678         git_revwalk *w = NULL;
 679         git_oid id;
 680         size_t i, m = 100; /* last 'm' commits */
 681
 682         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 683               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 684         xmlencode(fp, strippedname, strlen(strippedname));
 685         fputs(", branch HEAD</title>\n<subtitle>", fp);
 686         xmlencode(fp, description, strlen(description));
 687         fputs("</subtitle>\n", fp);
 688
 689         git_revwalk_new(&w, repo);
 690         git_revwalk_push_head(w);
 691         git_revwalk_sorting(w, GIT_SORT_TIME);
 692         git_revwalk_simplify_first_parent(w);
 693
 694         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 695                 if (!(ci = commitinfo_getbyoid(&id)))
 696                         break;
 697                 printcommitatom(fp, ci);
 698                 commitinfo_free(ci);
 699         }
 700         git_revwalk_free(w);
 701
 702         fputs("</feed>", fp);
 703
 704         return 0;
 705 }
 706
 707 int
 708 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 709 {
 710         char tmp[PATH_MAX] = "", *d;
 711         const char *p;
 712         int lc = 0;
 713         FILE *fp;
 714
 715         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 716                 errx(1, "path truncated: '%s'", fpath);
 717         if (!(d = dirname(tmp)))
 718                 err(1, "dirname");
 719         if (mkdirp(d))
 720                 return -1;
 721
 722         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 723                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 724                         errx(1, "path truncated: '../%s'", tmp);
 725         }
 726         relpath = tmp;
 727
 728         fp = efopen(fpath, "w");
 729         writeheader(fp, filename);
 730         fputs("<p> ", fp);
 731         xmlencode(fp, filename, strlen(filename));
 732         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 733         fputs("</p><hr/>", fp);
 734
 735         if (git_blob_is_binary((git_blob *)obj)) {
 736                 fputs("<p>Binary file.</p>\n", fp);
 737         } else {
 738                 lc = writeblobhtml(fp, (git_blob *)obj);
 739                 if (ferror(fp))
 740                         err(1, "fwrite");
 741         }
 742         writefooter(fp);
 743         fclose(fp);
 744
 745         relpath = "";
 746
 747         return lc;
 748 }
 749
 750 const char *
 751 filemode(git_filemode_t m)
 752 {
 753         static char mode[11];
 754
 755         memset(mode, '-', sizeof(mode) - 1);
 756         mode[10] = '\0';
 757
 758         if (S_ISREG(m))
 759                 mode[0] = '-';
 760         else if (S_ISBLK(m))
 761                 mode[0] = 'b';
 762         else if (S_ISCHR(m))
 763                 mode[0] = 'c';
 764         else if (S_ISDIR(m))
 765                 mode[0] = 'd';
 766         else if (S_ISFIFO(m))
 767                 mode[0] = 'p';
 768         else if (S_ISLNK(m))
 769                 mode[0] = 'l';
 770         else if (S_ISSOCK(m))
 771                 mode[0] = 's';
 772         else
 773                 mode[0] = '?';
 774
 775         if (m & S_IRUSR) mode[1] = 'r';
 776         if (m & S_IWUSR) mode[2] = 'w';
 777         if (m & S_IXUSR) mode[3] = 'x';
 778         if (m & S_IRGRP) mode[4] = 'r';
 779         if (m & S_IWGRP) mode[5] = 'w';
 780         if (m & S_IXGRP) mode[6] = 'x';
 781         if (m & S_IROTH) mode[7] = 'r';
 782         if (m & S_IWOTH) mode[8] = 'w';
 783         if (m & S_IXOTH) mode[9] = 'x';
 784
 785         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 786         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 787         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 788
 789         return mode;
 790 }
 791
 792 int
 793 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 794 {
 795         const git_tree_entry *entry = NULL;
 796         git_submodule *module = NULL;
 797         git_object *obj = NULL;
 798         git_off_t filesize;
 799         const char *entryname;
 800         char filepath[PATH_MAX], entrypath[PATH_MAX];
 801         size_t count, i;
 802         int lc, r, ret;
 803
 804         count = git_tree_entrycount(tree);
 805         for (i = 0; i < count; i++) {
 806                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 807                     !(entryname = git_tree_entry_name(entry)))
 808                         return -1;
 809                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 810
 811                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 812                          entrypath);
 813                 if (r == -1 || (size_t)r >= sizeof(filepath))
 814                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 815
 816                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 817                         switch (git_object_type(obj)) {
 818                         case GIT_OBJ_BLOB:
 819                                 break;
 820                         case GIT_OBJ_TREE:
 821                                 /* NOTE: recurses */
 822                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 823                                                      entrypath);
 824                                 git_object_free(obj);
 825                                 if (ret)
 826                                         return ret;
 827                                 continue;
 828                         default:
 829                                 git_object_free(obj);
 830                                 continue;
 831                         }
 832
 833                         filesize = git_blob_rawsize((git_blob *)obj);
 834                         lc = writeblob(obj, filepath, entryname, filesize);
 835
 836                         fputs("<tr><td>", fp);
 837                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 838                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 839                         xmlencode(fp, entrypath, strlen(entrypath));
 840                         fputs("</a></td><td class=\"num\">", fp);
 841                         if (showlinecount && lc > 0)
 842                                 fprintf(fp, "%dL", lc);
 843                         else
 844                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 845                         fputs("</td></tr>\n", fp);
 846                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 847                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 848                                 relpath);
 849                         xmlencode(fp, entrypath, strlen(entrypath));
 850                         git_submodule_free(module);
 851                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 852                 }
 853         }
 854
 855         return 0;
 856 }
 857
 858 int
 859 writefiles(FILE *fp, const git_oid *id, const char *branch)
 860 {
 861         git_tree *tree = NULL;
 862         git_commit *commit = NULL;
 863         int ret = -1;
 864
 865         fputs("<table id=\"files\"><thead>\n<tr>"
 866               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 867               "</tr>\n</thead><tbody>\n", fp);
 868
 869         if (!git_commit_lookup(&commit, repo, id) &&
 870             !git_commit_tree(&tree, commit))
 871                 ret = writefilestree(fp, tree, branch, "");
 872
 873         fputs("</tbody></table>", fp);
 874
 875         git_commit_free(commit);
 876         git_tree_free(tree);
 877
 878         return ret;
 879 }
 880
 881 int
 882 refs_cmp(const void *v1, const void *v2)
 883 {
 884         git_reference *r1 = (*(git_reference **)v1);
 885         git_reference *r2 = (*(git_reference **)v2);
 886         int r;
 887
 888         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 889                 return r;
 890
 891         return strcmp(git_reference_shorthand(r1),
 892                       git_reference_shorthand(r2));
 893 }
 894
 895 int
 896 writerefs(FILE *fp)
 897 {
 898         struct commitinfo *ci;
 899         const git_oid *id = NULL;
 900         git_object *obj = NULL;
 901         git_reference *dref = NULL, *r, *ref = NULL;
 902         git_reference_iterator *it = NULL;
 903         git_reference **refs = NULL;
 904         size_t count, i, j, refcount;
 905         const char *titles[] = { "Branches", "Tags" };
 906         const char *ids[] = { "branches", "tags" };
 907         const char *name;
 908
 909         if (git_reference_iterator_new(&it, repo))
 910                 return -1;
 911
 912         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 913                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 914                         err(1, "realloc");
 915                 refs[refcount] = ref;
 916         }
 917         git_reference_iterator_free(it);
 918
 919         /* sort by type then shorthand name */
 920         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 921
 922         for (j = 0; j < 2; j++) {
 923                 for (i = 0, count = 0; i < refcount; i++) {
 924                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 925                             !(git_reference_is_tag(refs[i]) && j == 1))
 926                                 continue;
 927
 928                         switch (git_reference_type(refs[i])) {
 929                         case GIT_REF_SYMBOLIC:
 930                                 if (git_reference_resolve(&dref, refs[i]))
 931                                         goto err;
 932                                 r = dref;
 933                                 break;
 934                         case GIT_REF_OID:
 935                                 r = refs[i];
 936                                 break;
 937                         default:
 938                                 continue;
 939                         }
 940                         if (!git_reference_target(r) ||
 941                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 942                                 goto err;
 943                         if (!(id = git_object_id(obj)))
 944                                 goto err;
 945                         if (!(ci = commitinfo_getbyoid(id)))
 946                                 break;
 947
 948                         /* print header if it has an entry (first). */
 949                         if (++count == 1) {
 950                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 951                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 952                                       titles[j], ids[j]);
 953                         }
 954
 955                         relpath = "";
 956                         name = git_reference_shorthand(r);
 957
 958                         fputs("<tr><td>", fp);
 959                         xmlencode(fp, name, strlen(name));
 960                         fputs("</td><td>", fp);
 961                         if (ci->author)
 962                                 printtimeshort(fp, &(ci->author->when));
 963                         fputs("</td><td>", fp);
 964                         if (ci->author)
 965                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 966                         fputs("</td></tr>\n", fp);
 967
 968                         relpath = "../";
 969
 970                         commitinfo_free(ci);
 971                         git_object_free(obj);
 972                         obj = NULL;
 973                         git_reference_free(dref);
 974                         dref = NULL;
 975                 }
 976                 /* table footer */
 977                 if (count)
 978                         fputs("</tbody></table><br/>", fp);
 979         }
 980
 981 err:
 982         git_object_free(obj);
 983         git_reference_free(dref);
 984
 985         for (i = 0; i < refcount; i++)
 986                 git_reference_free(refs[i]);
 987         free(refs);
 988
 989         return 0;
 990 }
 991
 992 void
 993 usage(char *argv0)
 994 {
 995         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
 996         exit(1);
 997 }
 998
 999 int
1000 main(int argc, char *argv[])
1001 {
1002         git_object *obj = NULL;
1003         const git_oid *head = NULL;
1004         const git_error *e = NULL;
1005         FILE *fp, *fpread;
1006         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1007         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1008         size_t n;
1009         int i, fd;
1010
1011         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1012                 err(1, "pledge");
1013
1014         for (i = 1; i < argc; i++) {
1015                 if (argv[i][0] != '-') {
1016                         if (repodir)
1017                                 usage(argv[0]);
1018                         repodir = argv[i];
1019                 } else if (argv[i][1] == 'c') {
1020                         if (i + 1 >= argc)
1021                                 usage(argv[0]);
1022                         cachefile = argv[++i];
1023                 }
1024         }
1025         if (!repodir)
1026                 usage(argv[0]);
1027
1028         if (!realpath(repodir, repodirabs))
1029                 err(1, "realpath");
1030
1031         git_libgit2_init();
1032
1033         if (git_repository_open_ext(&repo, repodir,
1034                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1035                 e = giterr_last();
1036                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1037                 return 1;
1038         }
1039
1040         /* find HEAD */
1041         if (!git_revparse_single(&obj, repo, "HEAD"))
1042                 head = git_object_id(obj);
1043         git_object_free(obj);
1044
1045         /* don't cache if there is no HEAD */
1046         if (!head)
1047                 cachefile = NULL;
1048
1049         /* use directory name as name */
1050         if ((name = strrchr(repodirabs, '/')))
1051                 name++;
1052         else
1053                 name = "";
1054
1055         /* strip .git suffix */
1056         if (!(strippedname = strdup(name)))
1057                 err(1, "strdup");
1058         if ((p = strrchr(strippedname, '.')))
1059                 if (!strcmp(p, ".git"))
1060                         *p = '\0';
1061
1062         /* read description or .git/description */
1063         joinpath(path, sizeof(path), repodir, "description");
1064         if (!(fpread = fopen(path, "r"))) {
1065                 joinpath(path, sizeof(path), repodir, ".git/description");
1066                 fpread = fopen(path, "r");
1067         }
1068         if (fpread) {
1069                 if (!fgets(description, sizeof(description), fpread))
1070                         description[0] = '\0';
1071                 fclose(fpread);
1072         }
1073
1074         /* read url or .git/url */
1075         joinpath(path, sizeof(path), repodir, "url");
1076         if (!(fpread = fopen(path, "r"))) {
1077                 joinpath(path, sizeof(path), repodir, ".git/url");
1078                 fpread = fopen(path, "r");
1079         }
1080         if (fpread) {
1081                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1082                         cloneurl[0] = '\0';
1083                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1084                 fclose(fpread);
1085         }
1086
1087         /* check LICENSE */
1088         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1089                 git_object_type(obj) == GIT_OBJ_BLOB);
1090         git_object_free(obj);
1091
1092         /* check README */
1093         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1094                 git_object_type(obj) == GIT_OBJ_BLOB);
1095         git_object_free(obj);
1096
1097         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1098                 git_object_type(obj) == GIT_OBJ_BLOB);
1099         git_object_free(obj);
1100
1101         /* log for HEAD */
1102         fp = efopen("log.html", "w");
1103         relpath = "";
1104         mkdir("commit", 0755);
1105         writeheader(fp, "Log");
1106         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1107                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1108                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1109
1110         if (cachefile) {
1111                 /* read from cache file (does not need to exist) */
1112                 if ((rcachefp = fopen(cachefile, "r"))) {
1113                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1114                                 errx(1, "%s: no object id", cachefile);
1115                         if (git_oid_fromstr(&lastoid, lastoidstr))
1116                                 errx(1, "%s: invalid object id", cachefile);
1117                 }
1118
1119                 /* write log to (temporary) cache */
1120                 if ((fd = mkstemp(tmppath)) == -1)
1121                         err(1, "mkstemp");
1122                 if (!(wcachefp = fdopen(fd, "w")))
1123                         err(1, "fdopen");
1124                 /* write last commit id (HEAD) */
1125                 git_oid_tostr(buf, sizeof(buf), head);
1126                 fprintf(wcachefp, "%s\n", buf);
1127
1128                 writelog(fp, head);
1129
1130                 if (rcachefp) {
1131                         /* append previous log to log.html and the new cache */
1132                         while (!feof(rcachefp)) {
1133                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1134                                 if (ferror(rcachefp))
1135                                         err(1, "fread");
1136                                 if (fwrite(buf, 1, n, fp) != n ||
1137                                     fwrite(buf, 1, n, wcachefp) != n)
1138                                         err(1, "fwrite");
1139                         }
1140                         fclose(rcachefp);
1141                 }
1142                 fclose(wcachefp);
1143         } else {
1144                 if (head)
1145                         writelog(fp, head);
1146         }
1147
1148         fputs("</tbody></table>", fp);
1149         writefooter(fp);
1150         fclose(fp);
1151
1152         /* files for HEAD */
1153         fp = efopen("files.html", "w");
1154         writeheader(fp, "Files");
1155         if (head)
1156                 writefiles(fp, head, "HEAD");
1157         writefooter(fp);
1158         fclose(fp);
1159
1160         /* summary page with branches and tags */
1161         fp = efopen("refs.html", "w");
1162         writeheader(fp, "Refs");
1163         writerefs(fp);
1164         writefooter(fp);
1165         fclose(fp);
1166
1167         /* Atom feed */
1168         fp = efopen("atom.xml", "w");
1169         writeatom(fp);
1170         fclose(fp);
1171
1172         /* rename new cache file on success */
1173         if (cachefile && rename(tmppath, cachefile))
1174                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1175
1176         /* cleanup */
1177         git_repository_free(repo);
1178         git_libgit2_shutdown();
1179
1180         return 0;
1181 }