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 #define pledge(p1,p2) 0
  73 #endif
  74
  75 void
  76 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  77 {
  78         int r;
  79
  80         r = snprintf(buf, bufsiz, "%s%s%s",
  81                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  82         if (r == -1 || (size_t)r >= bufsiz)
  83                 errx(1, "path truncated: '%s%s%s'",
  84                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  85 }
  86
  87 void
  88 deltainfo_free(struct deltainfo *di)
  89 {
  90         if (!di)
  91                 return;
  92         git_patch_free(di->patch);
  93         di->patch = NULL;
  94         free(di);
  95 }
  96
  97 int
  98 commitinfo_getstats(struct commitinfo *ci)
  99 {
 100         struct deltainfo *di;
 101         const git_diff_delta *delta;
 102         const git_diff_hunk *hunk;
 103         const git_diff_line *line;
 104         git_patch *patch = NULL;
 105         size_t ndeltas, nhunks, nhunklines;
 106         size_t i, j, k;
 107
 108         ndeltas = git_diff_num_deltas(ci->diff);
 109         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 110                 err(1, "calloc");
 111
 112         for (i = 0; i < ndeltas; i++) {
 113                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 114                         err(1, "calloc");
 115                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 116                         git_patch_free(patch);
 117                         free(di);
 118                         goto err;
 119                 }
 120                 di->patch = patch;
 121                 ci->deltas[i] = di;
 122
 123                 delta = git_patch_get_delta(patch);
 124
 125                 /* skip stats for binary data */
 126                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 127                         continue;
 128
 129                 nhunks = git_patch_num_hunks(patch);
 130                 for (j = 0; j < nhunks; j++) {
 131                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 132                                 break;
 133                         for (k = 0; ; k++) {
 134                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 135                                         break;
 136                                 if (line->old_lineno == -1) {
 137                                         di->addcount++;
 138                                         ci->addcount++;
 139                                 } else if (line->new_lineno == -1) {
 140                                         di->delcount++;
 141                                         ci->delcount++;
 142                                 }
 143                         }
 144                 }
 145         }
 146         ci->ndeltas = i;
 147         ci->filecount = i;
 148
 149         return 0;
 150
 151 err:
 152         if (ci->deltas)
 153                 for (i = 0; i < ci->ndeltas; i++)
 154                         deltainfo_free(ci->deltas[i]);
 155         free(ci->deltas);
 156         ci->deltas = NULL;
 157         ci->ndeltas = 0;
 158         ci->addcount = 0;
 159         ci->delcount = 0;
 160         ci->filecount = 0;
 161
 162         return -1;
 163 }
 164
 165 void
 166 commitinfo_free(struct commitinfo *ci)
 167 {
 168         size_t i;
 169
 170         if (!ci)
 171                 return;
 172         if (ci->deltas)
 173                 for (i = 0; i < ci->ndeltas; i++)
 174                         deltainfo_free(ci->deltas[i]);
 175         free(ci->deltas);
 176         ci->deltas = NULL;
 177         git_diff_free(ci->diff);
 178         git_tree_free(ci->commit_tree);
 179         git_tree_free(ci->parent_tree);
 180         git_commit_free(ci->commit);
 181         git_commit_free(ci->parent);
 182         free(ci);
 183 }
 184
 185 struct commitinfo *
 186 commitinfo_getbyoid(const git_oid *id)
 187 {
 188         struct commitinfo *ci;
 189         git_diff_options opts;
 190
 191         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 192                 err(1, "calloc");
 193
 194         if (git_commit_lookup(&(ci->commit), repo, id))
 195                 goto err;
 196         ci->id = id;
 197
 198         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 199         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 200
 201         ci->author = git_commit_author(ci->commit);
 202         ci->committer = git_commit_committer(ci->commit);
 203         ci->summary = git_commit_summary(ci->commit);
 204         ci->msg = git_commit_message(ci->commit);
 205
 206         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 207                 goto err;
 208         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 209                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 210                         ci->parent = NULL;
 211                         ci->parent_tree = NULL;
 212                 }
 213         }
 214
 215         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 216         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 217         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 218                 goto err;
 219         if (commitinfo_getstats(ci) == -1)
 220                 goto err;
 221
 222         return ci;
 223
 224 err:
 225         commitinfo_free(ci);
 226
 227         return NULL;
 228 }
 229
 230 FILE *
 231 efopen(const char *name, const char *flags)
 232 {
 233         FILE *fp;
 234
 235         if (!(fp = fopen(name, flags)))
 236                 err(1, "fopen");
 237
 238         return fp;
 239 }
 240
 241 /* Escape characters below as HTML 2.0 / XML 1.0. */
 242 void
 243 xmlencode(FILE *fp, const char *s, size_t len)
 244 {
 245         size_t i;
 246
 247         for (i = 0; *s && i < len; s++, i++) {
 248                 switch(*s) {
 249                 case '<':  fputs("&lt;",   fp); break;
 250                 case '>':  fputs("&gt;",   fp); break;
 251                 case '\'': fputs("&#39;",  fp); break;
 252                 case '&':  fputs("&amp;",  fp); break;
 253                 case '"':  fputs("&quot;", fp); break;
 254                 default:   fputc(*s, fp);
 255                 }
 256         }
 257 }
 258
 259 int
 260 mkdirp(const char *path)
 261 {
 262         char tmp[PATH_MAX], *p;
 263
 264         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 265                 errx(1, "path truncated: '%s'", path);
 266         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 267                 if (*p != '/')
 268                         continue;
 269                 *p = '\0';
 270                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 271                         return -1;
 272                 *p = '/';
 273         }
 274         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 275                 return -1;
 276         return 0;
 277 }
 278
 279 void
 280 printtimez(FILE *fp, const git_time *intime)
 281 {
 282         struct tm *intm;
 283         time_t t;
 284         char out[32];
 285
 286         t = (time_t)intime->time;
 287         if (!(intm = gmtime(&t)))
 288                 return;
 289         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 290         fputs(out, fp);
 291 }
 292
 293 void
 294 printtime(FILE *fp, const git_time *intime)
 295 {
 296         struct tm *intm;
 297         time_t t;
 298         char out[32];
 299
 300         t = (time_t)intime->time + (intime->offset * 60);
 301         if (!(intm = gmtime(&t)))
 302                 return;
 303         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 304         if (intime->offset < 0)
 305                 fprintf(fp, "%s -%02d%02d", out,
 306                             -(intime->offset) / 60, -(intime->offset) % 60);
 307         else
 308                 fprintf(fp, "%s +%02d%02d", out,
 309                             intime->offset / 60, intime->offset % 60);
 310 }
 311
 312 void
 313 printtimeshort(FILE *fp, const git_time *intime)
 314 {
 315         struct tm *intm;
 316         time_t t;
 317         char out[32];
 318
 319         t = (time_t)intime->time;
 320         if (!(intm = gmtime(&t)))
 321                 return;
 322         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 323         fputs(out, fp);
 324 }
 325
 326 void
 327 writeheader(FILE *fp, const char *title)
 328 {
 329         fputs("<!DOCTYPE html>\n"
 330                 "<html>\n<head>\n"
 331                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 332                 "<title>", fp);
 333         xmlencode(fp, title, strlen(title));
 334         if (title[0] && strippedname[0])
 335                 fputs(" - ", fp);
 336         xmlencode(fp, strippedname, strlen(strippedname));
 337         if (description[0])
 338                 fputs(" - ", fp);
 339         xmlencode(fp, description, strlen(description));
 340         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 341         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 342                 name, relpath);
 343         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 344         fputs("</head>\n<body>\n<table><tr><td>", fp);
 345         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 346                 relpath, relpath);
 347         fputs("</td><td><h1>", fp);
 348         xmlencode(fp, strippedname, strlen(strippedname));
 349         fputs("</h1><span class=\"desc\">", fp);
 350         xmlencode(fp, description, strlen(description));
 351         fputs("</span></td></tr>", fp);
 352         if (cloneurl[0]) {
 353                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 354                 xmlencode(fp, cloneurl, strlen(cloneurl));
 355                 fputs("\">", fp);
 356                 xmlencode(fp, cloneurl, strlen(cloneurl));
 357                 fputs("</a></td></tr>", fp);
 358         }
 359         fputs("<tr><td></td><td>\n", fp);
 360         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 361         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 362         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 363         if (hassubmodules)
 364                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 365         if (hasreadme)
 366                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 367         if (haslicense)
 368                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 369         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 370 }
 371
 372 void
 373 writefooter(FILE *fp)
 374 {
 375         fputs("</div>\n</body>\n</html>\n", fp);
 376 }
 377
 378 int
 379 writeblobhtml(FILE *fp, const git_blob *blob)
 380 {
 381         size_t n = 0, i, prev;
 382         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%6d</a>  ";
 383         const char *s = git_blob_rawcontent(blob);
 384         git_off_t len = git_blob_rawsize(blob);
 385
 386         fputs("<pre id=\"blob\">\n", fp);
 387
 388         if (len > 0) {
 389                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 390                         if (s[i] != '\n')
 391                                 continue;
 392                         n++;
 393                         fprintf(fp, nfmt, n, n, n);
 394                         xmlencode(fp, &s[prev], i - prev + 1);
 395                         prev = i + 1;
 396                 }
 397                 /* trailing data */
 398                 if ((i - prev) > 0) {
 399                         n++;
 400                         fprintf(fp, nfmt, n, n, n);
 401                         xmlencode(fp, &s[prev], len - prev);
 402                 }
 403         }
 404
 405         fputs("</pre>\n", fp);
 406
 407         return n;
 408 }
 409
 410 void
 411 printcommit(FILE *fp, struct commitinfo *ci)
 412 {
 413         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 414                 relpath, ci->oid, ci->oid);
 415
 416         if (ci->parentoid[0])
 417                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 418                         relpath, ci->parentoid, ci->parentoid);
 419
 420         if (ci->author) {
 421                 fputs("<b>Author:</b> ", fp);
 422                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 423                 fputs(" &lt;<a href=\"mailto:", fp);
 424                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 425                 fputs("\">", fp);
 426                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 427                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 428                 printtime(fp, &(ci->author->when));
 429                 fputc('\n', fp);
 430         }
 431         if (ci->msg) {
 432                 fputc('\n', fp);
 433                 xmlencode(fp, ci->msg, strlen(ci->msg));
 434                 fputc('\n', fp);
 435         }
 436 }
 437
 438 void
 439 printshowfile(FILE *fp, struct commitinfo *ci)
 440 {
 441         const git_diff_delta *delta;
 442         const git_diff_hunk *hunk;
 443         const git_diff_line *line;
 444         git_patch *patch;
 445         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 446         char linestr[80];
 447
 448         printcommit(fp, ci);
 449
 450         if (!ci->deltas)
 451                 return;
 452
 453         if (ci->filecount > 1000   ||
 454             ci->ndeltas   > 1000   ||
 455             ci->addcount  > 100000 ||
 456             ci->delcount  > 100000) {
 457                 fputs("Diff is too large, output suppressed.\n", fp);
 458                 return;
 459         }
 460
 461         /* diff stat */
 462         fputs("<b>Diffstat:</b>\n<table>", fp);
 463         for (i = 0; i < ci->ndeltas; i++) {
 464                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 465                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 466                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 467                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 468                         fputs(" -&gt; ", fp);
 469                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 470                 }
 471
 472                 add = ci->deltas[i]->addcount;
 473                 del = ci->deltas[i]->delcount;
 474                 changed = add + del;
 475                 total = sizeof(linestr) - 2;
 476                 if (changed > total) {
 477                         if (add)
 478                                 add = ((float)total / changed * add) + 1;
 479                         if (del)
 480                                 del = ((float)total / changed * del) + 1;
 481                 }
 482                 memset(&linestr, '+', add);
 483                 memset(&linestr[add], '-', del);
 484
 485                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 486                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 487                 fwrite(&linestr, 1, add, fp);
 488                 fputs("</span><span class=\"d\">", fp);
 489                 fwrite(&linestr[add], 1, del, fp);
 490                 fputs("</span></td></tr>\n", fp);
 491         }
 492         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 493                 ci->filecount, ci->filecount == 1 ? "" : "s",
 494                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 495                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 496
 497         fputs("<hr/>", fp);
 498
 499         for (i = 0; i < ci->ndeltas; i++) {
 500                 patch = ci->deltas[i]->patch;
 501                 delta = git_patch_get_delta(patch);
 502                 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",
 503                         i, relpath, delta->old_file.path, delta->old_file.path,
 504                         relpath, delta->new_file.path, delta->new_file.path);
 505
 506                 /* check binary data */
 507                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 508                         fputs("Binary files differ.\n", fp);
 509                         continue;
 510                 }
 511
 512                 nhunks = git_patch_num_hunks(patch);
 513                 for (j = 0; j < nhunks; j++) {
 514                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 515                                 break;
 516
 517                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 518                         xmlencode(fp, hunk->header, hunk->header_len);
 519                         fputs("</a>", fp);
 520
 521                         for (k = 0; ; k++) {
 522                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 523                                         break;
 524                                 if (line->old_lineno == -1)
 525                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 526                                                 i, j, k, i, j, k);
 527                                 else if (line->new_lineno == -1)
 528                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 529                                                 i, j, k, i, j, k);
 530                                 else
 531                                         fputc(' ', fp);
 532                                 xmlencode(fp, line->content, line->content_len);
 533                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 534                                         fputs("</a>", fp);
 535                         }
 536                 }
 537         }
 538 }
 539
 540 void
 541 writelogline(FILE *fp, struct commitinfo *ci)
 542 {
 543         size_t len;
 544
 545         fputs("<tr><td>", fp);
 546         if (ci->author)
 547                 printtimeshort(fp, &(ci->author->when));
 548         fputs("</td><td>", fp);
 549         if (ci->summary) {
 550                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 551                 if ((len = strlen(ci->summary)) > summarylen) {
 552                         xmlencode(fp, ci->summary, summarylen - 1);
 553                         fputs("…", fp);
 554                 } else {
 555                         xmlencode(fp, ci->summary, len);
 556                 }
 557                 fputs("</a>", fp);
 558         }
 559         fputs("</td><td>", fp);
 560         if (ci->author)
 561                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 562         fputs("</td><td class=\"num\" align=\"right\">", fp);
 563         fprintf(fp, "%zu", ci->filecount);
 564         fputs("</td><td class=\"num\" align=\"right\">", fp);
 565         fprintf(fp, "+%zu", ci->addcount);
 566         fputs("</td><td class=\"num\" align=\"right\">", fp);
 567         fprintf(fp, "-%zu", ci->delcount);
 568         fputs("</td></tr>\n", fp);
 569 }
 570
 571 int
 572 writelog(FILE *fp, const git_oid *oid)
 573 {
 574         struct commitinfo *ci;
 575         git_revwalk *w = NULL;
 576         git_oid id;
 577         char path[PATH_MAX];
 578         FILE *fpfile;
 579         int r;
 580
 581         git_revwalk_new(&w, repo);
 582         git_revwalk_push(w, oid);
 583         git_revwalk_sorting(w, GIT_SORT_TIME);
 584         git_revwalk_simplify_first_parent(w);
 585
 586         while (!git_revwalk_next(&id, w)) {
 587                 relpath = "";
 588
 589                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 590                         break;
 591                 if (!(ci = commitinfo_getbyoid(&id)))
 592                         break;
 593
 594                 writelogline(fp, ci);
 595                 if (cachefile)
 596                         writelogline(wcachefp, ci);
 597
 598                 relpath = "../";
 599
 600                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 601                 if (r == -1 || (size_t)r >= sizeof(path))
 602                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 603
 604                 /* check if file exists if so skip it */
 605                 if (access(path, F_OK)) {
 606                         fpfile = efopen(path, "w");
 607                         writeheader(fpfile, ci->summary);
 608                         fputs("<pre>", fpfile);
 609                         printshowfile(fpfile, ci);
 610                         fputs("</pre>\n", fpfile);
 611                         writefooter(fpfile);
 612                         fclose(fpfile);
 613                 }
 614                 commitinfo_free(ci);
 615         }
 616         git_revwalk_free(w);
 617
 618         relpath = "";
 619
 620         return 0;
 621 }
 622
 623 void
 624 printcommitatom(FILE *fp, struct commitinfo *ci)
 625 {
 626         fputs("<entry>\n", fp);
 627
 628         fprintf(fp, "<id>%s</id>\n", ci->oid);
 629         if (ci->author) {
 630                 fputs("<published>", fp);
 631                 printtimez(fp, &(ci->author->when));
 632                 fputs("</published>\n", fp);
 633         }
 634         if (ci->committer) {
 635                 fputs("<updated>", fp);
 636                 printtimez(fp, &(ci->committer->when));
 637                 fputs("</updated>\n", fp);
 638         }
 639         if (ci->summary) {
 640                 fputs("<title type=\"text\">", fp);
 641                 xmlencode(fp, ci->summary, strlen(ci->summary));
 642                 fputs("</title>\n", fp);
 643         }
 644         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 645                 ci->oid);
 646
 647         if (ci->author) {
 648                 fputs("<author><name>", fp);
 649                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 650                 fputs("</name>\n<email>", fp);
 651                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 652                 fputs("</email>\n</author>\n", fp);
 653         }
 654
 655         fputs("<content type=\"text\">", fp);
 656         fprintf(fp, "commit %s\n", ci->oid);
 657         if (ci->parentoid[0])
 658                 fprintf(fp, "parent %s\n", ci->parentoid);
 659         if (ci->author) {
 660                 fputs("Author: ", fp);
 661                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 662                 fputs(" &lt;", fp);
 663                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 664                 fputs("&gt;\nDate:   ", fp);
 665                 printtime(fp, &(ci->author->when));
 666                 fputc('\n', fp);
 667         }
 668         if (ci->msg) {
 669                 fputc('\n', fp);
 670                 xmlencode(fp, ci->msg, strlen(ci->msg));
 671         }
 672         fputs("\n</content>\n</entry>\n", fp);
 673 }
 674
 675 int
 676 writeatom(FILE *fp)
 677 {
 678         struct commitinfo *ci;
 679         git_revwalk *w = NULL;
 680         git_oid id;
 681         size_t i, m = 100; /* last 'm' commits */
 682
 683         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 684               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 685         xmlencode(fp, strippedname, strlen(strippedname));
 686         fputs(", branch HEAD</title>\n<subtitle>", fp);
 687         xmlencode(fp, description, strlen(description));
 688         fputs("</subtitle>\n", fp);
 689
 690         git_revwalk_new(&w, repo);
 691         git_revwalk_push_head(w);
 692         git_revwalk_sorting(w, GIT_SORT_TIME);
 693         git_revwalk_simplify_first_parent(w);
 694
 695         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 696                 if (!(ci = commitinfo_getbyoid(&id)))
 697                         break;
 698                 printcommitatom(fp, ci);
 699                 commitinfo_free(ci);
 700         }
 701         git_revwalk_free(w);
 702
 703         fputs("</feed>\n", fp);
 704
 705         return 0;
 706 }
 707
 708 int
 709 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 710 {
 711         char tmp[PATH_MAX] = "", *d;
 712         const char *p;
 713         int lc = 0;
 714         FILE *fp;
 715
 716         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 717                 errx(1, "path truncated: '%s'", fpath);
 718         if (!(d = dirname(tmp)))
 719                 err(1, "dirname");
 720         if (mkdirp(d))
 721                 return -1;
 722
 723         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 724                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 725                         errx(1, "path truncated: '../%s'", tmp);
 726         }
 727         relpath = tmp;
 728
 729         fp = efopen(fpath, "w");
 730         writeheader(fp, filename);
 731         fputs("<p> ", fp);
 732         xmlencode(fp, filename, strlen(filename));
 733         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 734         fputs("</p><hr/>", fp);
 735
 736         if (git_blob_is_binary((git_blob *)obj)) {
 737                 fputs("<p>Binary file.</p>\n", fp);
 738         } else {
 739                 lc = writeblobhtml(fp, (git_blob *)obj);
 740                 if (ferror(fp))
 741                         err(1, "fwrite");
 742         }
 743         writefooter(fp);
 744         fclose(fp);
 745
 746         relpath = "";
 747
 748         return lc;
 749 }
 750
 751 const char *
 752 filemode(git_filemode_t m)
 753 {
 754         static char mode[11];
 755
 756         memset(mode, '-', sizeof(mode) - 1);
 757         mode[10] = '\0';
 758
 759         if (S_ISREG(m))
 760                 mode[0] = '-';
 761         else if (S_ISBLK(m))
 762                 mode[0] = 'b';
 763         else if (S_ISCHR(m))
 764                 mode[0] = 'c';
 765         else if (S_ISDIR(m))
 766                 mode[0] = 'd';
 767         else if (S_ISFIFO(m))
 768                 mode[0] = 'p';
 769         else if (S_ISLNK(m))
 770                 mode[0] = 'l';
 771         else if (S_ISSOCK(m))
 772                 mode[0] = 's';
 773         else
 774                 mode[0] = '?';
 775
 776         if (m & S_IRUSR) mode[1] = 'r';
 777         if (m & S_IWUSR) mode[2] = 'w';
 778         if (m & S_IXUSR) mode[3] = 'x';
 779         if (m & S_IRGRP) mode[4] = 'r';
 780         if (m & S_IWGRP) mode[5] = 'w';
 781         if (m & S_IXGRP) mode[6] = 'x';
 782         if (m & S_IROTH) mode[7] = 'r';
 783         if (m & S_IWOTH) mode[8] = 'w';
 784         if (m & S_IXOTH) mode[9] = 'x';
 785
 786         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 787         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 788         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 789
 790         return mode;
 791 }
 792
 793 int
 794 writefilestree(FILE *fp, git_tree *tree, const char *path)
 795 {
 796         const git_tree_entry *entry = NULL;
 797         git_submodule *module = NULL;
 798         git_object *obj = NULL;
 799         git_off_t filesize;
 800         const char *entryname;
 801         char filepath[PATH_MAX], entrypath[PATH_MAX];
 802         size_t count, i;
 803         int lc, r, ret;
 804
 805         count = git_tree_entrycount(tree);
 806         for (i = 0; i < count; i++) {
 807                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 808                     !(entryname = git_tree_entry_name(entry)))
 809                         return -1;
 810                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 811
 812                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 813                          entrypath);
 814                 if (r == -1 || (size_t)r >= sizeof(filepath))
 815                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 816
 817                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 818                         switch (git_object_type(obj)) {
 819                         case GIT_OBJ_BLOB:
 820                                 break;
 821                         case GIT_OBJ_TREE:
 822                                 /* NOTE: recurses */
 823                                 ret = writefilestree(fp, (git_tree *)obj,
 824                                                      entrypath);
 825                                 git_object_free(obj);
 826                                 if (ret)
 827                                         return ret;
 828                                 continue;
 829                         default:
 830                                 git_object_free(obj);
 831                                 continue;
 832                         }
 833
 834                         filesize = git_blob_rawsize((git_blob *)obj);
 835                         lc = writeblob(obj, filepath, entryname, filesize);
 836
 837                         fputs("<tr><td>", fp);
 838                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 839                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 840                         xmlencode(fp, entrypath, strlen(entrypath));
 841                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 842                         if (showlinecount && lc > 0)
 843                                 fprintf(fp, "%dL", lc);
 844                         else
 845                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 846                         fputs("</td></tr>\n", fp);
 847                         git_object_free(obj);
 848                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 849                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 850                                 relpath);
 851                         xmlencode(fp, entrypath, strlen(entrypath));
 852                         git_submodule_free(module);
 853                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 854                 }
 855         }
 856
 857         return 0;
 858 }
 859
 860 int
 861 writefiles(FILE *fp, const git_oid *id)
 862 {
 863         git_tree *tree = NULL;
 864         git_commit *commit = NULL;
 865         int ret = -1;
 866
 867         fputs("<table id=\"files\"><thead>\n<tr>"
 868               "<td><b>Mode</b></td><td><b>Name</b></td>"
 869               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 870               "</tr>\n</thead><tbody>\n", fp);
 871
 872         if (!git_commit_lookup(&commit, repo, id) &&
 873             !git_commit_tree(&tree, commit))
 874                 ret = writefilestree(fp, tree, "");
 875
 876         fputs("</tbody></table>", fp);
 877
 878         git_commit_free(commit);
 879         git_tree_free(tree);
 880
 881         return ret;
 882 }
 883
 884 int
 885 refs_cmp(const void *v1, const void *v2)
 886 {
 887         git_reference *r1 = (*(git_reference **)v1);
 888         git_reference *r2 = (*(git_reference **)v2);
 889         int r;
 890
 891         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 892                 return r;
 893
 894         return strcmp(git_reference_shorthand(r1),
 895                       git_reference_shorthand(r2));
 896 }
 897
 898 int
 899 writerefs(FILE *fp)
 900 {
 901         struct commitinfo *ci;
 902         const git_oid *id = NULL;
 903         git_object *obj = NULL;
 904         git_reference *dref = NULL, *r, *ref = NULL;
 905         git_reference_iterator *it = NULL;
 906         git_reference **refs = NULL;
 907         size_t count, i, j, refcount;
 908         const char *titles[] = { "Branches", "Tags" };
 909         const char *ids[] = { "branches", "tags" };
 910         const char *name;
 911
 912         if (git_reference_iterator_new(&it, repo))
 913                 return -1;
 914
 915         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 916                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 917                         err(1, "realloc");
 918                 refs[refcount] = ref;
 919         }
 920         git_reference_iterator_free(it);
 921
 922         /* sort by type then shorthand name */
 923         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 924
 925         for (j = 0; j < 2; j++) {
 926                 for (i = 0, count = 0; i < refcount; i++) {
 927                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 928                             !(git_reference_is_tag(refs[i]) && j == 1))
 929                                 continue;
 930
 931                         switch (git_reference_type(refs[i])) {
 932                         case GIT_REF_SYMBOLIC:
 933                                 if (git_reference_resolve(&dref, refs[i]))
 934                                         goto err;
 935                                 r = dref;
 936                                 break;
 937                         case GIT_REF_OID:
 938                                 r = refs[i];
 939                                 break;
 940                         default:
 941                                 continue;
 942                         }
 943                         if (!git_reference_target(r) ||
 944                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 945                                 goto err;
 946                         if (!(id = git_object_id(obj)))
 947                                 goto err;
 948                         if (!(ci = commitinfo_getbyoid(id)))
 949                                 break;
 950
 951                         /* print header if it has an entry (first). */
 952                         if (++count == 1) {
 953                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 954                                         "<thead>\n<tr><td><b>Name</b></td>"
 955                                         "<td><b>Last commit date</b></td>"
 956                                         "<td><b>Author</b></td>\n</tr>\n"
 957                                         "</thead><tbody>\n",
 958                                          titles[j], ids[j]);
 959                         }
 960
 961                         relpath = "";
 962                         name = git_reference_shorthand(r);
 963
 964                         fputs("<tr><td>", fp);
 965                         xmlencode(fp, name, strlen(name));
 966                         fputs("</td><td>", fp);
 967                         if (ci->author)
 968                                 printtimeshort(fp, &(ci->author->when));
 969                         fputs("</td><td>", fp);
 970                         if (ci->author)
 971                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 972                         fputs("</td></tr>\n", fp);
 973
 974                         relpath = "../";
 975
 976                         commitinfo_free(ci);
 977                         git_object_free(obj);
 978                         obj = NULL;
 979                         git_reference_free(dref);
 980                         dref = NULL;
 981                 }
 982                 /* table footer */
 983                 if (count)
 984                         fputs("</tbody></table><br/>", fp);
 985         }
 986
 987 err:
 988         git_object_free(obj);
 989         git_reference_free(dref);
 990
 991         for (i = 0; i < refcount; i++)
 992                 git_reference_free(refs[i]);
 993         free(refs);
 994
 995         return 0;
 996 }
 997
 998 void
 999 usage(char *argv0)
1000 {
1001         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
1002         exit(1);
1003 }
1004
1005 int
1006 main(int argc, char *argv[])
1007 {
1008         git_object *obj = NULL;
1009         const git_oid *head = NULL;
1010         const git_error *e = NULL;
1011         FILE *fp, *fpread;
1012         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1013         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1014         size_t n;
1015         int i, fd;
1016
1017         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1018                 err(1, "pledge");
1019
1020         for (i = 1; i < argc; i++) {
1021                 if (argv[i][0] != '-') {
1022                         if (repodir)
1023                                 usage(argv[0]);
1024                         repodir = argv[i];
1025                 } else if (argv[i][1] == 'c') {
1026                         if (i + 1 >= argc)
1027                                 usage(argv[0]);
1028                         cachefile = argv[++i];
1029                 }
1030         }
1031         if (!repodir)
1032                 usage(argv[0]);
1033
1034         if (!realpath(repodir, repodirabs))
1035                 err(1, "realpath");
1036
1037         git_libgit2_init();
1038
1039         if (git_repository_open_ext(&repo, repodir,
1040                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1041                 e = giterr_last();
1042                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1043                 return 1;
1044         }
1045
1046         /* find HEAD */
1047         if (!git_revparse_single(&obj, repo, "HEAD"))
1048                 head = git_object_id(obj);
1049         git_object_free(obj);
1050
1051         /* don't cache if there is no HEAD */
1052         if (!head)
1053                 cachefile = NULL;
1054
1055         /* use directory name as name */
1056         if ((name = strrchr(repodirabs, '/')))
1057                 name++;
1058         else
1059                 name = "";
1060
1061         /* strip .git suffix */
1062         if (!(strippedname = strdup(name)))
1063                 err(1, "strdup");
1064         if ((p = strrchr(strippedname, '.')))
1065                 if (!strcmp(p, ".git"))
1066                         *p = '\0';
1067
1068         /* read description or .git/description */
1069         joinpath(path, sizeof(path), repodir, "description");
1070         if (!(fpread = fopen(path, "r"))) {
1071                 joinpath(path, sizeof(path), repodir, ".git/description");
1072                 fpread = fopen(path, "r");
1073         }
1074         if (fpread) {
1075                 if (!fgets(description, sizeof(description), fpread))
1076                         description[0] = '\0';
1077                 fclose(fpread);
1078         }
1079
1080         /* read url or .git/url */
1081         joinpath(path, sizeof(path), repodir, "url");
1082         if (!(fpread = fopen(path, "r"))) {
1083                 joinpath(path, sizeof(path), repodir, ".git/url");
1084                 fpread = fopen(path, "r");
1085         }
1086         if (fpread) {
1087                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1088                         cloneurl[0] = '\0';
1089                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1090                 fclose(fpread);
1091         }
1092
1093         /* check LICENSE */
1094         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1095                 git_object_type(obj) == GIT_OBJ_BLOB);
1096         git_object_free(obj);
1097
1098         /* check README */
1099         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1100                 git_object_type(obj) == GIT_OBJ_BLOB);
1101         git_object_free(obj);
1102
1103         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1104                 git_object_type(obj) == GIT_OBJ_BLOB);
1105         git_object_free(obj);
1106
1107         /* log for HEAD */
1108         fp = efopen("log.html", "w");
1109         relpath = "";
1110         mkdir("commit", 0755);
1111         writeheader(fp, "Log");
1112         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1113               "<td><b>Commit message</b></td>"
1114               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1115               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1116               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1117
1118         if (cachefile) {
1119                 /* read from cache file (does not need to exist) */
1120                 if ((rcachefp = fopen(cachefile, "r"))) {
1121                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1122                                 errx(1, "%s: no object id", cachefile);
1123                         if (git_oid_fromstr(&lastoid, lastoidstr))
1124                                 errx(1, "%s: invalid object id", cachefile);
1125                 }
1126
1127                 /* write log to (temporary) cache */
1128                 if ((fd = mkstemp(tmppath)) == -1)
1129                         err(1, "mkstemp");
1130                 if (!(wcachefp = fdopen(fd, "w")))
1131                         err(1, "fdopen");
1132                 /* write last commit id (HEAD) */
1133                 git_oid_tostr(buf, sizeof(buf), head);
1134                 fprintf(wcachefp, "%s\n", buf);
1135
1136                 writelog(fp, head);
1137
1138                 if (rcachefp) {
1139                         /* append previous log to log.html and the new cache */
1140                         while (!feof(rcachefp)) {
1141                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1142                                 if (ferror(rcachefp))
1143                                         err(1, "fread");
1144                                 if (fwrite(buf, 1, n, fp) != n ||
1145                                     fwrite(buf, 1, n, wcachefp) != n)
1146                                         err(1, "fwrite");
1147                         }
1148                         fclose(rcachefp);
1149                 }
1150                 fclose(wcachefp);
1151         } else {
1152                 if (head)
1153                         writelog(fp, head);
1154         }
1155
1156         fputs("</tbody></table>", fp);
1157         writefooter(fp);
1158         fclose(fp);
1159
1160         /* files for HEAD */
1161         fp = efopen("files.html", "w");
1162         writeheader(fp, "Files");
1163         if (head)
1164                 writefiles(fp, head);
1165         writefooter(fp);
1166         fclose(fp);
1167
1168         /* summary page with branches and tags */
1169         fp = efopen("refs.html", "w");
1170         writeheader(fp, "Refs");
1171         writerefs(fp);
1172         writefooter(fp);
1173         fclose(fp);
1174
1175         /* Atom feed */
1176         fp = efopen("atom.xml", "w");
1177         writeatom(fp);
1178         fclose(fp);
1179
1180         /* rename new cache file on success */
1181         if (cachefile && rename(tmppath, cachefile))
1182                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1183
1184         /* cleanup */
1185         git_repository_free(repo);
1186         git_libgit2_shutdown();
1187
1188         return 0;
1189 }