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