stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <inttypes.h>
   7 #include <libgen.h>
   8 #include <limits.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13
  14 #include <git2.h>
  15
  16 #include "compat.h"
  17
  18 struct deltainfo {
  19         git_patch *patch;
  20
  21         size_t addcount;
  22         size_t delcount;
  23 };
  24
  25 struct commitinfo {
  26         const git_oid *id;
  27
  28         char oid[GIT_OID_HEXSZ + 1];
  29         char parentoid[GIT_OID_HEXSZ + 1];
  30
  31         const git_signature *author;
  32         const git_signature *committer;
  33         const char          *summary;
  34         const char          *msg;
  35
  36         git_diff   *diff;
  37         git_commit *commit;
  38         git_commit *parent;
  39         git_tree   *commit_tree;
  40         git_tree   *parent_tree;
  41
  42         size_t addcount;
  43         size_t delcount;
  44         size_t filecount;
  45
  46         struct deltainfo **deltas;
  47         size_t ndeltas;
  48 };
  49
  50 static git_repository *repo;
  51
  52 static const char *relpath = "";
  53 static const char *repodir;
  54
  55 static char *name = "";
  56 static char *strippedname = "";
  57 static char description[255];
  58 static char cloneurl[1024];
  59 static int haslicense, hasreadme, hassubmodules;
  60
  61 /* cache */
  62 static git_oid lastoid;
  63 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  64 static FILE *rcachefp, *wcachefp;
  65 static const char *cachefile;
  66
  67 #ifndef USE_PLEDGE
  68 #define pledge(p1,p2) 0
  69 #endif
  70
  71 void
  72 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  73 {
  74         int r;
  75
  76         r = snprintf(buf, bufsiz, "%s%s%s",
  77                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  78         if (r == -1 || (size_t)r >= bufsiz)
  79                 errx(1, "path truncated: '%s%s%s'",
  80                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  81 }
  82
  83 void
  84 deltainfo_free(struct deltainfo *di)
  85 {
  86         if (!di)
  87                 return;
  88         git_patch_free(di->patch);
  89         di->patch = NULL;
  90         free(di);
  91 }
  92
  93 int
  94 commitinfo_getstats(struct commitinfo *ci)
  95 {
  96         struct deltainfo *di;
  97         const git_diff_delta *delta;
  98         const git_diff_hunk *hunk;
  99         const git_diff_line *line;
 100         git_patch *patch = NULL;
 101         size_t ndeltas, nhunks, nhunklines;
 102         size_t i, j, k;
 103
 104         ndeltas = git_diff_num_deltas(ci->diff);
 105         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 106                 err(1, "calloc");
 107
 108         for (i = 0; i < ndeltas; i++) {
 109                 if (git_patch_from_diff(&patch, ci->diff, i))
 110                         goto err;
 111                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 112                         err(1, "calloc");
 113                 di->patch = patch;
 114                 ci->deltas[i] = di;
 115
 116                 delta = git_patch_get_delta(patch);
 117
 118                 /* skip stats for binary data */
 119                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 120                         continue;
 121
 122                 nhunks = git_patch_num_hunks(patch);
 123                 for (j = 0; j < nhunks; j++) {
 124                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 125                                 break;
 126                         for (k = 0; ; k++) {
 127                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 128                                         break;
 129                                 if (line->old_lineno == -1) {
 130                                         di->addcount++;
 131                                         ci->addcount++;
 132                                 } else if (line->new_lineno == -1) {
 133                                         di->delcount++;
 134                                         ci->delcount++;
 135                                 }
 136                         }
 137                 }
 138         }
 139         ci->ndeltas = i;
 140         ci->filecount = i;
 141
 142         return 0;
 143
 144 err:
 145         if (ci->deltas)
 146                 for (i = 0; i < ci->ndeltas; i++)
 147                         deltainfo_free(ci->deltas[i]);
 148         free(ci->deltas);
 149         ci->deltas = NULL;
 150         ci->ndeltas = 0;
 151         ci->addcount = 0;
 152         ci->delcount = 0;
 153         ci->filecount = 0;
 154
 155         return -1;
 156 }
 157
 158 void
 159 commitinfo_free(struct commitinfo *ci)
 160 {
 161         size_t i;
 162
 163         if (!ci)
 164                 return;
 165         if (ci->deltas)
 166                 for (i = 0; i < ci->ndeltas; i++)
 167                         deltainfo_free(ci->deltas[i]);
 168         free(ci->deltas);
 169         ci->deltas = NULL;
 170         git_diff_free(ci->diff);
 171         git_tree_free(ci->commit_tree);
 172         git_tree_free(ci->parent_tree);
 173         git_commit_free(ci->commit);
 174         git_commit_free(ci->parent);
 175         free(ci);
 176 }
 177
 178 struct commitinfo *
 179 commitinfo_getbyoid(const git_oid *id)
 180 {
 181         struct commitinfo *ci;
 182         git_diff_options opts;
 183
 184         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 185                 err(1, "calloc");
 186
 187         if (git_commit_lookup(&(ci->commit), repo, id))
 188                 goto err;
 189         ci->id = id;
 190
 191         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 192         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 193
 194         ci->author = git_commit_author(ci->commit);
 195         ci->committer = git_commit_committer(ci->commit);
 196         ci->summary = git_commit_summary(ci->commit);
 197         ci->msg = git_commit_message(ci->commit);
 198
 199         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 200                 goto err;
 201         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 202                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 203                         ci->parent = NULL;
 204                         ci->parent_tree = NULL;
 205                 }
 206         }
 207
 208         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 209         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 210         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 211                 goto err;
 212
 213         return ci;
 214
 215 err:
 216         commitinfo_free(ci);
 217
 218         return NULL;
 219 }
 220
 221 FILE *
 222 efopen(const char *name, const char *flags)
 223 {
 224         FILE *fp;
 225
 226         if (!(fp = fopen(name, flags)))
 227                 err(1, "fopen: '%s'", name);
 228
 229         return fp;
 230 }
 231
 232 /* Escape characters below as HTML 2.0 / XML 1.0. */
 233 void
 234 xmlencode(FILE *fp, const char *s, size_t len)
 235 {
 236         size_t i;
 237
 238         for (i = 0; *s && i < len; s++, i++) {
 239                 switch(*s) {
 240                 case '<':  fputs("&lt;",   fp); break;
 241                 case '>':  fputs("&gt;",   fp); break;
 242                 case '\'': fputs("&#39;",  fp); break;
 243                 case '&':  fputs("&amp;",  fp); break;
 244                 case '"':  fputs("&quot;", fp); break;
 245                 default:   fputc(*s, fp);
 246                 }
 247         }
 248 }
 249
 250 int
 251 mkdirp(const char *path)
 252 {
 253         char tmp[PATH_MAX], *p;
 254
 255         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 256                 errx(1, "path truncated: '%s'", path);
 257         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 258                 if (*p != '/')
 259                         continue;
 260                 *p = '\0';
 261                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 262                         return -1;
 263                 *p = '/';
 264         }
 265         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 266                 return -1;
 267         return 0;
 268 }
 269
 270 void
 271 printtimez(FILE *fp, const git_time *intime)
 272 {
 273         struct tm *intm;
 274         time_t t;
 275         char out[32];
 276
 277         t = (time_t)intime->time;
 278         if (!(intm = gmtime(&t)))
 279                 return;
 280         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 281         fputs(out, fp);
 282 }
 283
 284 void
 285 printtime(FILE *fp, const git_time *intime)
 286 {
 287         struct tm *intm;
 288         time_t t;
 289         char out[32];
 290
 291         t = (time_t)intime->time + (intime->offset * 60);
 292         if (!(intm = gmtime(&t)))
 293                 return;
 294         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 295         if (intime->offset < 0)
 296                 fprintf(fp, "%s -%02d%02d", out,
 297                             -(intime->offset) / 60, -(intime->offset) % 60);
 298         else
 299                 fprintf(fp, "%s +%02d%02d", out,
 300                             intime->offset / 60, intime->offset % 60);
 301 }
 302
 303 void
 304 printtimeshort(FILE *fp, const git_time *intime)
 305 {
 306         struct tm *intm;
 307         time_t t;
 308         char out[32];
 309
 310         t = (time_t)intime->time;
 311         if (!(intm = gmtime(&t)))
 312                 return;
 313         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 314         fputs(out, fp);
 315 }
 316
 317 void
 318 writeheader(FILE *fp, const char *title)
 319 {
 320         fputs("<!DOCTYPE html>\n"
 321                 "<html>\n<head>\n"
 322                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 323                 "<title>", fp);
 324         xmlencode(fp, title, strlen(title));
 325         if (title[0] && strippedname[0])
 326                 fputs(" - ", fp);
 327         xmlencode(fp, strippedname, strlen(strippedname));
 328         if (description[0])
 329                 fputs(" - ", fp);
 330         xmlencode(fp, description, strlen(description));
 331         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 332         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 333                 name, relpath);
 334         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 335         fputs("</head>\n<body>\n<table><tr><td>", fp);
 336         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 337                 relpath, relpath);
 338         fputs("</td><td><h1>", fp);
 339         xmlencode(fp, strippedname, strlen(strippedname));
 340         fputs("</h1><span class=\"desc\">", fp);
 341         xmlencode(fp, description, strlen(description));
 342         fputs("</span></td></tr>", fp);
 343         if (cloneurl[0]) {
 344                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 345                 xmlencode(fp, cloneurl, strlen(cloneurl));
 346                 fputs("\">", fp);
 347                 xmlencode(fp, cloneurl, strlen(cloneurl));
 348                 fputs("</a></td></tr>", fp);
 349         }
 350         fputs("<tr><td></td><td>\n", fp);
 351         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 352         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 353         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 354         if (hassubmodules)
 355                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 356         if (hasreadme)
 357                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 358         if (haslicense)
 359                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 360         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 361 }
 362
 363 void
 364 writefooter(FILE *fp)
 365 {
 366         fputs("</div>\n</body>\n</html>\n", fp);
 367 }
 368
 369 int
 370 writeblobhtml(FILE *fp, const git_blob *blob)
 371 {
 372         size_t n = 0, i, prev;
 373         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 374         const char *s = git_blob_rawcontent(blob);
 375         git_off_t len = git_blob_rawsize(blob);
 376
 377         fputs("<pre id=\"blob\">\n", fp);
 378
 379         if (len > 0) {
 380                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 381                         if (s[i] != '\n')
 382                                 continue;
 383                         n++;
 384                         fprintf(fp, nfmt, n, n, n);
 385                         xmlencode(fp, &s[prev], i - prev + 1);
 386                         prev = i + 1;
 387                 }
 388                 /* trailing data */
 389                 if ((len - prev) > 0) {
 390                         n++;
 391                         fprintf(fp, nfmt, n, n, n);
 392                         xmlencode(fp, &s[prev], len - prev);
 393                 }
 394         }
 395
 396         fputs("</pre>\n", fp);
 397
 398         return n;
 399 }
 400
 401 void
 402 printcommit(FILE *fp, struct commitinfo *ci)
 403 {
 404         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 405                 relpath, ci->oid, ci->oid);
 406
 407         if (ci->parentoid[0])
 408                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 409                         relpath, ci->parentoid, ci->parentoid);
 410
 411         if (ci->author) {
 412                 fputs("<b>Author:</b> ", fp);
 413                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 414                 fputs(" &lt;<a href=\"mailto:", fp);
 415                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 416                 fputs("\">", fp);
 417                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 418                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 419                 printtime(fp, &(ci->author->when));
 420                 fputc('\n', fp);
 421         }
 422         if (ci->msg) {
 423                 fputc('\n', fp);
 424                 xmlencode(fp, ci->msg, strlen(ci->msg));
 425                 fputc('\n', fp);
 426         }
 427 }
 428
 429 void
 430 printshowfile(FILE *fp, struct commitinfo *ci)
 431 {
 432         const git_diff_delta *delta;
 433         const git_diff_hunk *hunk;
 434         const git_diff_line *line;
 435         git_patch *patch;
 436         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 437         char linestr[80];
 438
 439         printcommit(fp, ci);
 440
 441         if (!ci->deltas)
 442                 return;
 443
 444         if (ci->filecount > 1000   ||
 445             ci->ndeltas   > 1000   ||
 446             ci->addcount  > 100000 ||
 447             ci->delcount  > 100000) {
 448                 fputs("Diff is too large, output suppressed.\n", fp);
 449                 return;
 450         }
 451
 452         /* diff stat */
 453         fputs("<b>Diffstat:</b>\n<table>", fp);
 454         for (i = 0; i < ci->ndeltas; i++) {
 455                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 456                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 457                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 458                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 459                         fputs(" -&gt; ", fp);
 460                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 461                 }
 462
 463                 add = ci->deltas[i]->addcount;
 464                 del = ci->deltas[i]->delcount;
 465                 changed = add + del;
 466                 total = sizeof(linestr) - 2;
 467                 if (changed > total) {
 468                         if (add)
 469                                 add = ((float)total / changed * add) + 1;
 470                         if (del)
 471                                 del = ((float)total / changed * del) + 1;
 472                 }
 473                 memset(&linestr, '+', add);
 474                 memset(&linestr[add], '-', del);
 475
 476                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 477                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 478                 fwrite(&linestr, 1, add, fp);
 479                 fputs("</span><span class=\"d\">", fp);
 480                 fwrite(&linestr[add], 1, del, fp);
 481                 fputs("</span></td></tr>\n", fp);
 482         }
 483         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 484                 ci->filecount, ci->filecount == 1 ? "" : "s",
 485                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 486                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 487
 488         fputs("<hr/>", fp);
 489
 490         for (i = 0; i < ci->ndeltas; i++) {
 491                 patch = ci->deltas[i]->patch;
 492                 delta = git_patch_get_delta(patch);
 493                 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",
 494                         i, relpath, delta->old_file.path, delta->old_file.path,
 495                         relpath, delta->new_file.path, delta->new_file.path);
 496
 497                 /* check binary data */
 498                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 499                         fputs("Binary files differ.\n", fp);
 500                         continue;
 501                 }
 502
 503                 nhunks = git_patch_num_hunks(patch);
 504                 for (j = 0; j < nhunks; j++) {
 505                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 506                                 break;
 507
 508                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 509                         xmlencode(fp, hunk->header, hunk->header_len);
 510                         fputs("</a>", fp);
 511
 512                         for (k = 0; ; k++) {
 513                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 514                                         break;
 515                                 if (line->old_lineno == -1)
 516                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 517                                                 i, j, k, i, j, k);
 518                                 else if (line->new_lineno == -1)
 519                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 520                                                 i, j, k, i, j, k);
 521                                 else
 522                                         fputc(' ', fp);
 523                                 xmlencode(fp, line->content, line->content_len);
 524                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 525                                         fputs("</a>", fp);
 526                         }
 527                 }
 528         }
 529 }
 530
 531 void
 532 writelogline(FILE *fp, struct commitinfo *ci)
 533 {
 534         fputs("<tr><td>", fp);
 535         if (ci->author)
 536                 printtimeshort(fp, &(ci->author->when));
 537         fputs("</td><td>", fp);
 538         if (ci->summary) {
 539                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 540                 xmlencode(fp, ci->summary, strlen(ci->summary));
 541                 fputs("</a>", fp);
 542         }
 543         fputs("</td><td>", fp);
 544         if (ci->author)
 545                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 546         fputs("</td><td class=\"num\" align=\"right\">", fp);
 547         fprintf(fp, "%zu", ci->filecount);
 548         fputs("</td><td class=\"num\" align=\"right\">", fp);
 549         fprintf(fp, "+%zu", ci->addcount);
 550         fputs("</td><td class=\"num\" align=\"right\">", fp);
 551         fprintf(fp, "-%zu", ci->delcount);
 552         fputs("</td></tr>\n", fp);
 553 }
 554
 555 int
 556 writelog(FILE *fp, const git_oid *oid)
 557 {
 558         struct commitinfo *ci;
 559         git_revwalk *w = NULL;
 560         git_oid id;
 561         char path[PATH_MAX];
 562         FILE *fpfile;
 563         int r;
 564
 565         git_revwalk_new(&w, repo);
 566         git_revwalk_push(w, oid);
 567         git_revwalk_sorting(w, GIT_SORT_TIME);
 568         git_revwalk_simplify_first_parent(w);
 569
 570         while (!git_revwalk_next(&id, w)) {
 571                 relpath = "";
 572
 573                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 574                         break;
 575                 if (!(ci = commitinfo_getbyoid(&id)))
 576                         break;
 577                 /* lookup stats: only required here */
 578                 if (commitinfo_getstats(ci) == -1)
 579                         goto err;
 580
 581                 writelogline(fp, ci);
 582                 if (cachefile)
 583                         writelogline(wcachefp, ci);
 584
 585                 relpath = "../";
 586
 587                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 588                 if (r == -1 || (size_t)r >= sizeof(path))
 589                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 590
 591                 /* check if file exists if so skip it */
 592                 if (access(path, F_OK)) {
 593                         fpfile = efopen(path, "w");
 594                         writeheader(fpfile, ci->summary);
 595                         fputs("<pre>", fpfile);
 596                         printshowfile(fpfile, ci);
 597                         fputs("</pre>\n", fpfile);
 598                         writefooter(fpfile);
 599                         fclose(fpfile);
 600                 }
 601 err:
 602                 commitinfo_free(ci);
 603         }
 604         git_revwalk_free(w);
 605
 606         relpath = "";
 607
 608         return 0;
 609 }
 610
 611 void
 612 printcommitatom(FILE *fp, struct commitinfo *ci)
 613 {
 614         fputs("<entry>\n", fp);
 615
 616         fprintf(fp, "<id>%s</id>\n", ci->oid);
 617         if (ci->author) {
 618                 fputs("<published>", fp);
 619                 printtimez(fp, &(ci->author->when));
 620                 fputs("</published>\n", fp);
 621         }
 622         if (ci->committer) {
 623                 fputs("<updated>", fp);
 624                 printtimez(fp, &(ci->committer->when));
 625                 fputs("</updated>\n", fp);
 626         }
 627         if (ci->summary) {
 628                 fputs("<title type=\"text\">", fp);
 629                 xmlencode(fp, ci->summary, strlen(ci->summary));
 630                 fputs("</title>\n", fp);
 631         }
 632         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 633                 ci->oid);
 634
 635         if (ci->author) {
 636                 fputs("<author><name>", fp);
 637                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 638                 fputs("</name>\n<email>", fp);
 639                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 640                 fputs("</email>\n</author>\n", fp);
 641         }
 642
 643         fputs("<content type=\"text\">", fp);
 644         fprintf(fp, "commit %s\n", ci->oid);
 645         if (ci->parentoid[0])
 646                 fprintf(fp, "parent %s\n", ci->parentoid);
 647         if (ci->author) {
 648                 fputs("Author: ", fp);
 649                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 650                 fputs(" &lt;", fp);
 651                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 652                 fputs("&gt;\nDate:   ", fp);
 653                 printtime(fp, &(ci->author->when));
 654                 fputc('\n', fp);
 655         }
 656         if (ci->msg) {
 657                 fputc('\n', fp);
 658                 xmlencode(fp, ci->msg, strlen(ci->msg));
 659         }
 660         fputs("\n</content>\n</entry>\n", fp);
 661 }
 662
 663 int
 664 writeatom(FILE *fp)
 665 {
 666         struct commitinfo *ci;
 667         git_revwalk *w = NULL;
 668         git_oid id;
 669         size_t i, m = 100; /* last 'm' commits */
 670
 671         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 672               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 673         xmlencode(fp, strippedname, strlen(strippedname));
 674         fputs(", branch HEAD</title>\n<subtitle>", fp);
 675         xmlencode(fp, description, strlen(description));
 676         fputs("</subtitle>\n", fp);
 677
 678         git_revwalk_new(&w, repo);
 679         git_revwalk_push_head(w);
 680         git_revwalk_sorting(w, GIT_SORT_TIME);
 681         git_revwalk_simplify_first_parent(w);
 682
 683         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 684                 if (!(ci = commitinfo_getbyoid(&id)))
 685                         break;
 686                 printcommitatom(fp, ci);
 687                 commitinfo_free(ci);
 688         }
 689         git_revwalk_free(w);
 690
 691         fputs("</feed>\n", fp);
 692
 693         return 0;
 694 }
 695
 696 int
 697 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 698 {
 699         char tmp[PATH_MAX] = "", *d;
 700         const char *p;
 701         int lc = 0;
 702         FILE *fp;
 703
 704         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 705                 errx(1, "path truncated: '%s'", fpath);
 706         if (!(d = dirname(tmp)))
 707                 err(1, "dirname");
 708         if (mkdirp(d))
 709                 return -1;
 710
 711         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 712                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 713                         errx(1, "path truncated: '../%s'", tmp);
 714         }
 715         relpath = tmp;
 716
 717         fp = efopen(fpath, "w");
 718         writeheader(fp, filename);
 719         fputs("<p> ", fp);
 720         xmlencode(fp, filename, strlen(filename));
 721         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 722         fputs("</p><hr/>", fp);
 723
 724         if (git_blob_is_binary((git_blob *)obj)) {
 725                 fputs("<p>Binary file.</p>\n", fp);
 726         } else {
 727                 lc = writeblobhtml(fp, (git_blob *)obj);
 728                 if (ferror(fp))
 729                         err(1, "fwrite");
 730         }
 731         writefooter(fp);
 732         fclose(fp);
 733
 734         relpath = "";
 735
 736         return lc;
 737 }
 738
 739 const char *
 740 filemode(git_filemode_t m)
 741 {
 742         static char mode[11];
 743
 744         memset(mode, '-', sizeof(mode) - 1);
 745         mode[10] = '\0';
 746
 747         if (S_ISREG(m))
 748                 mode[0] = '-';
 749         else if (S_ISBLK(m))
 750                 mode[0] = 'b';
 751         else if (S_ISCHR(m))
 752                 mode[0] = 'c';
 753         else if (S_ISDIR(m))
 754                 mode[0] = 'd';
 755         else if (S_ISFIFO(m))
 756                 mode[0] = 'p';
 757         else if (S_ISLNK(m))
 758                 mode[0] = 'l';
 759         else if (S_ISSOCK(m))
 760                 mode[0] = 's';
 761         else
 762                 mode[0] = '?';
 763
 764         if (m & S_IRUSR) mode[1] = 'r';
 765         if (m & S_IWUSR) mode[2] = 'w';
 766         if (m & S_IXUSR) mode[3] = 'x';
 767         if (m & S_IRGRP) mode[4] = 'r';
 768         if (m & S_IWGRP) mode[5] = 'w';
 769         if (m & S_IXGRP) mode[6] = 'x';
 770         if (m & S_IROTH) mode[7] = 'r';
 771         if (m & S_IWOTH) mode[8] = 'w';
 772         if (m & S_IXOTH) mode[9] = 'x';
 773
 774         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 775         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 776         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 777
 778         return mode;
 779 }
 780
 781 int
 782 writefilestree(FILE *fp, git_tree *tree, const char *path)
 783 {
 784         const git_tree_entry *entry = NULL;
 785         git_submodule *module = NULL;
 786         git_object *obj = NULL;
 787         git_off_t filesize;
 788         const char *entryname;
 789         char filepath[PATH_MAX], entrypath[PATH_MAX];
 790         size_t count, i;
 791         int lc, r, ret;
 792
 793         count = git_tree_entrycount(tree);
 794         for (i = 0; i < count; i++) {
 795                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 796                     !(entryname = git_tree_entry_name(entry)))
 797                         return -1;
 798                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 799
 800                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 801                          entrypath);
 802                 if (r == -1 || (size_t)r >= sizeof(filepath))
 803                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 804
 805                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 806                         switch (git_object_type(obj)) {
 807                         case GIT_OBJ_BLOB:
 808                                 break;
 809                         case GIT_OBJ_TREE:
 810                                 /* NOTE: recurses */
 811                                 ret = writefilestree(fp, (git_tree *)obj,
 812                                                      entrypath);
 813                                 git_object_free(obj);
 814                                 if (ret)
 815                                         return ret;
 816                                 continue;
 817                         default:
 818                                 git_object_free(obj);
 819                                 continue;
 820                         }
 821
 822                         filesize = git_blob_rawsize((git_blob *)obj);
 823                         lc = writeblob(obj, filepath, entryname, filesize);
 824
 825                         fputs("<tr><td>", fp);
 826                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 827                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 828                         xmlencode(fp, entrypath, strlen(entrypath));
 829                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 830                         if (lc > 0)
 831                                 fprintf(fp, "%dL", lc);
 832                         else
 833                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 834                         fputs("</td></tr>\n", fp);
 835                         git_object_free(obj);
 836                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 837                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 838                                 relpath);
 839                         xmlencode(fp, entrypath, strlen(entrypath));
 840                         git_submodule_free(module);
 841                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 842                 }
 843         }
 844
 845         return 0;
 846 }
 847
 848 int
 849 writefiles(FILE *fp, const git_oid *id)
 850 {
 851         git_tree *tree = NULL;
 852         git_commit *commit = NULL;
 853         int ret = -1;
 854
 855         fputs("<table id=\"files\"><thead>\n<tr>"
 856               "<td><b>Mode</b></td><td><b>Name</b></td>"
 857               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 858               "</tr>\n</thead><tbody>\n", fp);
 859
 860         if (!git_commit_lookup(&commit, repo, id) &&
 861             !git_commit_tree(&tree, commit))
 862                 ret = writefilestree(fp, tree, "");
 863
 864         fputs("</tbody></table>", fp);
 865
 866         git_commit_free(commit);
 867         git_tree_free(tree);
 868
 869         return ret;
 870 }
 871
 872 int
 873 refs_cmp(const void *v1, const void *v2)
 874 {
 875         git_reference *r1 = (*(git_reference **)v1);
 876         git_reference *r2 = (*(git_reference **)v2);
 877         int r;
 878
 879         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 880                 return r;
 881
 882         return strcmp(git_reference_shorthand(r1),
 883                       git_reference_shorthand(r2));
 884 }
 885
 886 int
 887 writerefs(FILE *fp)
 888 {
 889         struct commitinfo *ci;
 890         const git_oid *id = NULL;
 891         git_object *obj = NULL;
 892         git_reference *dref = NULL, *r, *ref = NULL;
 893         git_reference_iterator *it = NULL;
 894         git_reference **refs = NULL;
 895         size_t count, i, j, refcount;
 896         const char *titles[] = { "Branches", "Tags" };
 897         const char *ids[] = { "branches", "tags" };
 898         const char *name;
 899
 900         if (git_reference_iterator_new(&it, repo))
 901                 return -1;
 902
 903         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 904                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 905                         err(1, "realloc");
 906                 refs[refcount] = ref;
 907         }
 908         git_reference_iterator_free(it);
 909
 910         /* sort by type then shorthand name */
 911         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 912
 913         for (j = 0; j < 2; j++) {
 914                 for (i = 0, count = 0; i < refcount; i++) {
 915                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 916                             !(git_reference_is_tag(refs[i]) && j == 1))
 917                                 continue;
 918
 919                         switch (git_reference_type(refs[i])) {
 920                         case GIT_REF_SYMBOLIC:
 921                                 if (git_reference_resolve(&dref, refs[i]))
 922                                         goto err;
 923                                 r = dref;
 924                                 break;
 925                         case GIT_REF_OID:
 926                                 r = refs[i];
 927                                 break;
 928                         default:
 929                                 continue;
 930                         }
 931                         if (!git_reference_target(r) ||
 932                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 933                                 goto err;
 934                         if (!(id = git_object_id(obj)))
 935                                 goto err;
 936                         if (!(ci = commitinfo_getbyoid(id)))
 937                                 break;
 938
 939                         /* print header if it has an entry (first). */
 940                         if (++count == 1) {
 941                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 942                                         "<thead>\n<tr><td><b>Name</b></td>"
 943                                         "<td><b>Last commit date</b></td>"
 944                                         "<td><b>Author</b></td>\n</tr>\n"
 945                                         "</thead><tbody>\n",
 946                                          titles[j], ids[j]);
 947                         }
 948
 949                         relpath = "";
 950                         name = git_reference_shorthand(r);
 951
 952                         fputs("<tr><td>", fp);
 953                         xmlencode(fp, name, strlen(name));
 954                         fputs("</td><td>", fp);
 955                         if (ci->author)
 956                                 printtimeshort(fp, &(ci->author->when));
 957                         fputs("</td><td>", fp);
 958                         if (ci->author)
 959                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 960                         fputs("</td></tr>\n", fp);
 961
 962                         relpath = "../";
 963
 964                         commitinfo_free(ci);
 965                         git_object_free(obj);
 966                         obj = NULL;
 967                         git_reference_free(dref);
 968                         dref = NULL;
 969                 }
 970                 /* table footer */
 971                 if (count)
 972                         fputs("</tbody></table><br/>", fp);
 973         }
 974
 975 err:
 976         git_object_free(obj);
 977         git_reference_free(dref);
 978
 979         for (i = 0; i < refcount; i++)
 980                 git_reference_free(refs[i]);
 981         free(refs);
 982
 983         return 0;
 984 }
 985
 986 void
 987 usage(char *argv0)
 988 {
 989         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
 990         exit(1);
 991 }
 992
 993 int
 994 main(int argc, char *argv[])
 995 {
 996         git_object *obj = NULL;
 997         const git_oid *head = NULL;
 998         const git_error *e = NULL;
 999         mode_t mask;
1000         FILE *fp, *fpread;
1001         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1002         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1003         size_t n;
1004         int i, fd;
1005
1006         if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1007                 err(1, "pledge");
1008
1009         for (i = 1; i < argc; i++) {
1010                 if (argv[i][0] != '-') {
1011                         if (repodir)
1012                                 usage(argv[0]);
1013                         repodir = argv[i];
1014                 } else if (argv[i][1] == 'c') {
1015                         if (i + 1 >= argc)
1016                                 usage(argv[0]);
1017                         cachefile = argv[++i];
1018                 }
1019         }
1020         if (!cachefile && pledge("stdio rpath wpath cpath", NULL) == -1)
1021                 err(1, "pledge");
1022         if (!repodir)
1023                 usage(argv[0]);
1024
1025         if (!realpath(repodir, repodirabs))
1026                 err(1, "realpath");
1027
1028         git_libgit2_init();
1029
1030         if (git_repository_open_ext(&repo, repodir,
1031                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1032                 e = giterr_last();
1033                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1034                 return 1;
1035         }
1036
1037         /* find HEAD */
1038         if (!git_revparse_single(&obj, repo, "HEAD"))
1039                 head = git_object_id(obj);
1040         git_object_free(obj);
1041
1042         /* use directory name as name */
1043         if ((name = strrchr(repodirabs, '/')))
1044                 name++;
1045         else
1046                 name = "";
1047
1048         /* strip .git suffix */
1049         if (!(strippedname = strdup(name)))
1050                 err(1, "strdup");
1051         if ((p = strrchr(strippedname, '.')))
1052                 if (!strcmp(p, ".git"))
1053                         *p = '\0';
1054
1055         /* read description or .git/description */
1056         joinpath(path, sizeof(path), repodir, "description");
1057         if (!(fpread = fopen(path, "r"))) {
1058                 joinpath(path, sizeof(path), repodir, ".git/description");
1059                 fpread = fopen(path, "r");
1060         }
1061         if (fpread) {
1062                 if (!fgets(description, sizeof(description), fpread))
1063                         description[0] = '\0';
1064                 fclose(fpread);
1065         }
1066
1067         /* read url or .git/url */
1068         joinpath(path, sizeof(path), repodir, "url");
1069         if (!(fpread = fopen(path, "r"))) {
1070                 joinpath(path, sizeof(path), repodir, ".git/url");
1071                 fpread = fopen(path, "r");
1072         }
1073         if (fpread) {
1074                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1075                         cloneurl[0] = '\0';
1076                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1077                 fclose(fpread);
1078         }
1079
1080         /* check LICENSE */
1081         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1082                 git_object_type(obj) == GIT_OBJ_BLOB);
1083         git_object_free(obj);
1084
1085         /* check README */
1086         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1087                 git_object_type(obj) == GIT_OBJ_BLOB);
1088         git_object_free(obj);
1089
1090         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1091                 git_object_type(obj) == GIT_OBJ_BLOB);
1092         git_object_free(obj);
1093
1094         /* log for HEAD */
1095         fp = efopen("log.html", "w");
1096         relpath = "";
1097         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1098         writeheader(fp, "Log");
1099         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1100               "<td><b>Commit message</b></td>"
1101               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1102               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1103               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1104
1105         if (cachefile && head) {
1106                 /* read from cache file (does not need to exist) */
1107                 if ((rcachefp = fopen(cachefile, "r"))) {
1108                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1109                                 errx(1, "%s: no object id", cachefile);
1110                         if (git_oid_fromstr(&lastoid, lastoidstr))
1111                                 errx(1, "%s: invalid object id", cachefile);
1112                 }
1113
1114                 /* write log to (temporary) cache */
1115                 if ((fd = mkstemp(tmppath)) == -1)
1116                         err(1, "mkstemp");
1117                 if (!(wcachefp = fdopen(fd, "w")))
1118                         err(1, "fdopen: '%s'", tmppath);
1119                 /* write last commit id (HEAD) */
1120                 git_oid_tostr(buf, sizeof(buf), head);
1121                 fprintf(wcachefp, "%s\n", buf);
1122
1123                 writelog(fp, head);
1124
1125                 if (rcachefp) {
1126                         /* append previous log to log.html and the new cache */
1127                         while (!feof(rcachefp)) {
1128                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1129                                 if (ferror(rcachefp))
1130                                         err(1, "fread");
1131                                 if (fwrite(buf, 1, n, fp) != n ||
1132                                     fwrite(buf, 1, n, wcachefp) != n)
1133                                         err(1, "fwrite");
1134                         }
1135                         fclose(rcachefp);
1136                 }
1137                 fclose(wcachefp);
1138         } else {
1139                 if (head)
1140                         writelog(fp, head);
1141         }
1142
1143         fputs("</tbody></table>", fp);
1144         writefooter(fp);
1145         fclose(fp);
1146
1147         /* files for HEAD */
1148         fp = efopen("files.html", "w");
1149         writeheader(fp, "Files");
1150         if (head)
1151                 writefiles(fp, head);
1152         writefooter(fp);
1153         fclose(fp);
1154
1155         /* summary page with branches and tags */
1156         fp = efopen("refs.html", "w");
1157         writeheader(fp, "Refs");
1158         writerefs(fp);
1159         writefooter(fp);
1160         fclose(fp);
1161
1162         /* Atom feed */
1163         fp = efopen("atom.xml", "w");
1164         writeatom(fp);
1165         fclose(fp);
1166
1167         /* rename new cache file on success */
1168         if (cachefile && head) {
1169                 if (rename(tmppath, cachefile))
1170                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1171                 umask((mask = umask(0)));
1172                 if (chmod(cachefile,
1173                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1174                         err(1, "chmod: '%s'", cachefile);
1175         }
1176
1177         /* cleanup */
1178         git_repository_free(repo);
1179         git_libgit2_shutdown();
1180
1181         return 0;
1182 }