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         off_t i;
 382         size_t n = 0;
 383         const char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 384         const char *s = git_blob_rawcontent(blob);
 385         git_off_t len = git_blob_rawsize(blob);
 386
 387         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 388
 389         if (len) {
 390                 n++;
 391                 fprintf(fp, nfmt, n, n, n);
 392                 for (i = 0; i < len - 1; i++) {
 393                         if (s[i] == '\n') {
 394                                 n++;
 395                                 fprintf(fp, nfmt, n, n, n);
 396                         }
 397                 }
 398         }
 399
 400         fputs("</pre></td><td><pre>\n", fp);
 401         xmlencode(fp, s, (size_t)len);
 402         fputs("</pre></td></tr></table>\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>%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\">", fp);
 560         fprintf(fp, "%zu", ci->filecount);
 561         fputs("</td><td class=\"num\">", fp);
 562         fprintf(fp, "+%zu", ci->addcount);
 563         fputs("</td><td class=\"num\">", 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\">", 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\"></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>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 866               "</tr>\n</thead><tbody>\n", fp);
 867
 868         if (!git_commit_lookup(&commit, repo, id) &&
 869             !git_commit_tree(&tree, commit))
 870                 ret = writefilestree(fp, tree, "");
 871
 872         fputs("</tbody></table>", fp);
 873
 874         git_commit_free(commit);
 875         git_tree_free(tree);
 876
 877         return ret;
 878 }
 879
 880 int
 881 refs_cmp(const void *v1, const void *v2)
 882 {
 883         git_reference *r1 = (*(git_reference **)v1);
 884         git_reference *r2 = (*(git_reference **)v2);
 885         int r;
 886
 887         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 888                 return r;
 889
 890         return strcmp(git_reference_shorthand(r1),
 891                       git_reference_shorthand(r2));
 892 }
 893
 894 int
 895 writerefs(FILE *fp)
 896 {
 897         struct commitinfo *ci;
 898         const git_oid *id = NULL;
 899         git_object *obj = NULL;
 900         git_reference *dref = NULL, *r, *ref = NULL;
 901         git_reference_iterator *it = NULL;
 902         git_reference **refs = NULL;
 903         size_t count, i, j, refcount;
 904         const char *titles[] = { "Branches", "Tags" };
 905         const char *ids[] = { "branches", "tags" };
 906         const char *name;
 907
 908         if (git_reference_iterator_new(&it, repo))
 909                 return -1;
 910
 911         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 912                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 913                         err(1, "realloc");
 914                 refs[refcount] = ref;
 915         }
 916         git_reference_iterator_free(it);
 917
 918         /* sort by type then shorthand name */
 919         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 920
 921         for (j = 0; j < 2; j++) {
 922                 for (i = 0, count = 0; i < refcount; i++) {
 923                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 924                             !(git_reference_is_tag(refs[i]) && j == 1))
 925                                 continue;
 926
 927                         switch (git_reference_type(refs[i])) {
 928                         case GIT_REF_SYMBOLIC:
 929                                 if (git_reference_resolve(&dref, refs[i]))
 930                                         goto err;
 931                                 r = dref;
 932                                 break;
 933                         case GIT_REF_OID:
 934                                 r = refs[i];
 935                                 break;
 936                         default:
 937                                 continue;
 938                         }
 939                         if (!git_reference_target(r) ||
 940                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 941                                 goto err;
 942                         if (!(id = git_object_id(obj)))
 943                                 goto err;
 944                         if (!(ci = commitinfo_getbyoid(id)))
 945                                 break;
 946
 947                         /* print header if it has an entry (first). */
 948                         if (++count == 1) {
 949                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 950                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 951                                       titles[j], ids[j]);
 952                         }
 953
 954                         relpath = "";
 955                         name = git_reference_shorthand(r);
 956
 957                         fputs("<tr><td>", fp);
 958                         xmlencode(fp, name, strlen(name));
 959                         fputs("</td><td>", fp);
 960                         if (ci->author)
 961                                 printtimeshort(fp, &(ci->author->when));
 962                         fputs("</td><td>", fp);
 963                         if (ci->author)
 964                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 965                         fputs("</td></tr>\n", fp);
 966
 967                         relpath = "../";
 968
 969                         commitinfo_free(ci);
 970                         git_object_free(obj);
 971                         obj = NULL;
 972                         git_reference_free(dref);
 973                         dref = NULL;
 974                 }
 975                 /* table footer */
 976                 if (count)
 977                         fputs("</tbody></table><br/>", fp);
 978         }
 979
 980 err:
 981         git_object_free(obj);
 982         git_reference_free(dref);
 983
 984         for (i = 0; i < refcount; i++)
 985                 git_reference_free(refs[i]);
 986         free(refs);
 987
 988         return 0;
 989 }
 990
 991 void
 992 usage(char *argv0)
 993 {
 994         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
 995         exit(1);
 996 }
 997
 998 int
 999 main(int argc, char *argv[])
1000 {
1001         git_object *obj = NULL;
1002         const git_oid *head = NULL;
1003         const git_error *e = NULL;
1004         FILE *fp, *fpread;
1005         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1006         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1007         size_t n;
1008         int i, fd;
1009
1010         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1011                 err(1, "pledge");
1012
1013         for (i = 1; i < argc; i++) {
1014                 if (argv[i][0] != '-') {
1015                         if (repodir)
1016                                 usage(argv[0]);
1017                         repodir = argv[i];
1018                 } else if (argv[i][1] == 'c') {
1019                         if (i + 1 >= argc)
1020                                 usage(argv[0]);
1021                         cachefile = argv[++i];
1022                 }
1023         }
1024         if (!repodir)
1025                 usage(argv[0]);
1026
1027         if (!realpath(repodir, repodirabs))
1028                 err(1, "realpath");
1029
1030         git_libgit2_init();
1031
1032         if (git_repository_open_ext(&repo, repodir,
1033                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1034                 e = giterr_last();
1035                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1036                 return 1;
1037         }
1038
1039         /* find HEAD */
1040         if (!git_revparse_single(&obj, repo, "HEAD"))
1041                 head = git_object_id(obj);
1042         git_object_free(obj);
1043
1044         /* don't cache if there is no HEAD */
1045         if (!head)
1046                 cachefile = NULL;
1047
1048         /* use directory name as name */
1049         if ((name = strrchr(repodirabs, '/')))
1050                 name++;
1051         else
1052                 name = "";
1053
1054         /* strip .git suffix */
1055         if (!(strippedname = strdup(name)))
1056                 err(1, "strdup");
1057         if ((p = strrchr(strippedname, '.')))
1058                 if (!strcmp(p, ".git"))
1059                         *p = '\0';
1060
1061         /* read description or .git/description */
1062         joinpath(path, sizeof(path), repodir, "description");
1063         if (!(fpread = fopen(path, "r"))) {
1064                 joinpath(path, sizeof(path), repodir, ".git/description");
1065                 fpread = fopen(path, "r");
1066         }
1067         if (fpread) {
1068                 if (!fgets(description, sizeof(description), fpread))
1069                         description[0] = '\0';
1070                 fclose(fpread);
1071         }
1072
1073         /* read url or .git/url */
1074         joinpath(path, sizeof(path), repodir, "url");
1075         if (!(fpread = fopen(path, "r"))) {
1076                 joinpath(path, sizeof(path), repodir, ".git/url");
1077                 fpread = fopen(path, "r");
1078         }
1079         if (fpread) {
1080                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1081                         cloneurl[0] = '\0';
1082                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1083                 fclose(fpread);
1084         }
1085
1086         /* check LICENSE */
1087         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1088                 git_object_type(obj) == GIT_OBJ_BLOB);
1089         git_object_free(obj);
1090
1091         /* check README */
1092         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1093                 git_object_type(obj) == GIT_OBJ_BLOB);
1094         git_object_free(obj);
1095
1096         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1097                 git_object_type(obj) == GIT_OBJ_BLOB);
1098         git_object_free(obj);
1099
1100         /* log for HEAD */
1101         fp = efopen("log.html", "w");
1102         relpath = "";
1103         mkdir("commit", 0755);
1104         writeheader(fp, "Log");
1105         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1106                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1107                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1108
1109         if (cachefile) {
1110                 /* read from cache file (does not need to exist) */
1111                 if ((rcachefp = fopen(cachefile, "r"))) {
1112                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1113                                 errx(1, "%s: no object id", cachefile);
1114                         if (git_oid_fromstr(&lastoid, lastoidstr))
1115                                 errx(1, "%s: invalid object id", cachefile);
1116                 }
1117
1118                 /* write log to (temporary) cache */
1119                 if ((fd = mkstemp(tmppath)) == -1)
1120                         err(1, "mkstemp");
1121                 if (!(wcachefp = fdopen(fd, "w")))
1122                         err(1, "fdopen");
1123                 /* write last commit id (HEAD) */
1124                 git_oid_tostr(buf, sizeof(buf), head);
1125                 fprintf(wcachefp, "%s\n", buf);
1126
1127                 writelog(fp, head);
1128
1129                 if (rcachefp) {
1130                         /* append previous log to log.html and the new cache */
1131                         while (!feof(rcachefp)) {
1132                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1133                                 if (ferror(rcachefp))
1134                                         err(1, "fread");
1135                                 if (fwrite(buf, 1, n, fp) != n ||
1136                                     fwrite(buf, 1, n, wcachefp) != n)
1137                                         err(1, "fwrite");
1138                         }
1139                         fclose(rcachefp);
1140                 }
1141                 fclose(wcachefp);
1142         } else {
1143                 if (head)
1144                         writelog(fp, head);
1145         }
1146
1147         fputs("</tbody></table>", fp);
1148         writefooter(fp);
1149         fclose(fp);
1150
1151         /* files for HEAD */
1152         fp = efopen("files.html", "w");
1153         writeheader(fp, "Files");
1154         if (head)
1155                 writefiles(fp, head);
1156         writefooter(fp);
1157         fclose(fp);
1158
1159         /* summary page with branches and tags */
1160         fp = efopen("refs.html", "w");
1161         writeheader(fp, "Refs");
1162         writerefs(fp);
1163         writefooter(fp);
1164         fclose(fp);
1165
1166         /* Atom feed */
1167         fp = efopen("atom.xml", "w");
1168         writeatom(fp);
1169         fclose(fp);
1170
1171         /* rename new cache file on success */
1172         if (cachefile && rename(tmppath, cachefile))
1173                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1174
1175         /* cleanup */
1176         git_repository_free(repo);
1177         git_libgit2_shutdown();
1178
1179         return 0;
1180 }