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