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 static git_repository *repo;
  50
  51 static const char *relpath = "";
  52 static const char *repodir;
  53
  54 static char *name = "";
  55 static char *strippedname = "";
  56 static char description[255];
  57 static char cloneurl[1024];
  58 static int haslicense, hasreadme, hassubmodules;
  59
  60 /* cache */
  61 static git_oid lastoid;
  62 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  63 static FILE *rcachefp, *wcachefp;
  64 static const char *cachefile;
  65
  66 #ifndef USE_PLEDGE
  67 #define pledge(p1,p2) 0
  68 #endif
  69
  70 void
  71 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  72 {
  73         int r;
  74
  75         r = snprintf(buf, bufsiz, "%s%s%s",
  76                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  77         if (r == -1 || (size_t)r >= bufsiz)
  78                 errx(1, "path truncated: '%s%s%s'",
  79                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  80 }
  81
  82 void
  83 deltainfo_free(struct deltainfo *di)
  84 {
  85         if (!di)
  86                 return;
  87         git_patch_free(di->patch);
  88         di->patch = NULL;
  89         free(di);
  90 }
  91
  92 int
  93 commitinfo_getstats(struct commitinfo *ci)
  94 {
  95         struct deltainfo *di;
  96         const git_diff_delta *delta;
  97         const git_diff_hunk *hunk;
  98         const git_diff_line *line;
  99         git_patch *patch = NULL;
 100         size_t ndeltas, nhunks, nhunklines;
 101         size_t i, j, k;
 102
 103         ndeltas = git_diff_num_deltas(ci->diff);
 104         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 105                 err(1, "calloc");
 106
 107         for (i = 0; i < ndeltas; i++) {
 108                 if (git_patch_from_diff(&patch, ci->diff, i))
 109                         goto err;
 110                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 111                         err(1, "calloc");
 112                 di->patch = patch;
 113                 ci->deltas[i] = di;
 114
 115                 delta = git_patch_get_delta(patch);
 116
 117                 /* skip stats for binary data */
 118                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 119                         continue;
 120
 121                 nhunks = git_patch_num_hunks(patch);
 122                 for (j = 0; j < nhunks; j++) {
 123                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 124                                 break;
 125                         for (k = 0; ; k++) {
 126                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 127                                         break;
 128                                 if (line->old_lineno == -1) {
 129                                         di->addcount++;
 130                                         ci->addcount++;
 131                                 } else if (line->new_lineno == -1) {
 132                                         di->delcount++;
 133                                         ci->delcount++;
 134                                 }
 135                         }
 136                 }
 137         }
 138         ci->ndeltas = i;
 139         ci->filecount = i;
 140
 141         return 0;
 142
 143 err:
 144         if (ci->deltas)
 145                 for (i = 0; i < ci->ndeltas; i++)
 146                         deltainfo_free(ci->deltas[i]);
 147         free(ci->deltas);
 148         ci->deltas = NULL;
 149         ci->ndeltas = 0;
 150         ci->addcount = 0;
 151         ci->delcount = 0;
 152         ci->filecount = 0;
 153
 154         return -1;
 155 }
 156
 157 void
 158 commitinfo_free(struct commitinfo *ci)
 159 {
 160         size_t i;
 161
 162         if (!ci)
 163                 return;
 164         if (ci->deltas)
 165                 for (i = 0; i < ci->ndeltas; i++)
 166                         deltainfo_free(ci->deltas[i]);
 167         free(ci->deltas);
 168         ci->deltas = NULL;
 169         git_diff_free(ci->diff);
 170         git_tree_free(ci->commit_tree);
 171         git_tree_free(ci->parent_tree);
 172         git_commit_free(ci->commit);
 173         git_commit_free(ci->parent);
 174         free(ci);
 175 }
 176
 177 struct commitinfo *
 178 commitinfo_getbyoid(const git_oid *id)
 179 {
 180         struct commitinfo *ci;
 181         git_diff_options opts;
 182
 183         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 184                 err(1, "calloc");
 185
 186         if (git_commit_lookup(&(ci->commit), repo, id))
 187                 goto err;
 188         ci->id = id;
 189
 190         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 191         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 192
 193         ci->author = git_commit_author(ci->commit);
 194         ci->committer = git_commit_committer(ci->commit);
 195         ci->summary = git_commit_summary(ci->commit);
 196         ci->msg = git_commit_message(ci->commit);
 197
 198         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 199                 goto err;
 200         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 201                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 202                         ci->parent = NULL;
 203                         ci->parent_tree = NULL;
 204                 }
 205         }
 206
 207         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 208         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 209         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 210                 goto err;
 211         if (commitinfo_getstats(ci) == -1)
 212                 goto err;
 213
 214         return ci;
 215
 216 err:
 217         commitinfo_free(ci);
 218
 219         return NULL;
 220 }
 221
 222 FILE *
 223 efopen(const char *name, const char *flags)
 224 {
 225         FILE *fp;
 226
 227         if (!(fp = fopen(name, flags)))
 228                 err(1, "fopen");
 229
 230         return fp;
 231 }
 232
 233 /* Escape characters below as HTML 2.0 / XML 1.0. */
 234 void
 235 xmlencode(FILE *fp, const char *s, size_t len)
 236 {
 237         size_t i;
 238
 239         for (i = 0; *s && i < len; s++, i++) {
 240                 switch(*s) {
 241                 case '<':  fputs("&lt;",   fp); break;
 242                 case '>':  fputs("&gt;",   fp); break;
 243                 case '\'': fputs("&#39;",  fp); break;
 244                 case '&':  fputs("&amp;",  fp); break;
 245                 case '"':  fputs("&quot;", fp); break;
 246                 default:   fputc(*s, fp);
 247                 }
 248         }
 249 }
 250
 251 int
 252 mkdirp(const char *path)
 253 {
 254         char tmp[PATH_MAX], *p;
 255
 256         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 257                 errx(1, "path truncated: '%s'", path);
 258         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 259                 if (*p != '/')
 260                         continue;
 261                 *p = '\0';
 262                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 263                         return -1;
 264                 *p = '/';
 265         }
 266         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 267                 return -1;
 268         return 0;
 269 }
 270
 271 void
 272 printtimez(FILE *fp, const git_time *intime)
 273 {
 274         struct tm *intm;
 275         time_t t;
 276         char out[32];
 277
 278         t = (time_t)intime->time;
 279         if (!(intm = gmtime(&t)))
 280                 return;
 281         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 282         fputs(out, fp);
 283 }
 284
 285 void
 286 printtime(FILE *fp, const git_time *intime)
 287 {
 288         struct tm *intm;
 289         time_t t;
 290         char out[32];
 291
 292         t = (time_t)intime->time + (intime->offset * 60);
 293         if (!(intm = gmtime(&t)))
 294                 return;
 295         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 296         if (intime->offset < 0)
 297                 fprintf(fp, "%s -%02d%02d", out,
 298                             -(intime->offset) / 60, -(intime->offset) % 60);
 299         else
 300                 fprintf(fp, "%s +%02d%02d", out,
 301                             intime->offset / 60, intime->offset % 60);
 302 }
 303
 304 void
 305 printtimeshort(FILE *fp, const git_time *intime)
 306 {
 307         struct tm *intm;
 308         time_t t;
 309         char out[32];
 310
 311         t = (time_t)intime->time;
 312         if (!(intm = gmtime(&t)))
 313                 return;
 314         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 315         fputs(out, fp);
 316 }
 317
 318 void
 319 writeheader(FILE *fp, const char *title)
 320 {
 321         fputs("<!DOCTYPE html>\n"
 322                 "<html>\n<head>\n"
 323                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 324                 "<title>", fp);
 325         xmlencode(fp, title, strlen(title));
 326         if (title[0] && strippedname[0])
 327                 fputs(" - ", fp);
 328         xmlencode(fp, strippedname, strlen(strippedname));
 329         if (description[0])
 330                 fputs(" - ", fp);
 331         xmlencode(fp, description, strlen(description));
 332         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 333         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 334                 name, relpath);
 335         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 336         fputs("</head>\n<body>\n<table><tr><td>", fp);
 337         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 338                 relpath, relpath);
 339         fputs("</td><td><h1>", fp);
 340         xmlencode(fp, strippedname, strlen(strippedname));
 341         fputs("</h1><span class=\"desc\">", fp);
 342         xmlencode(fp, description, strlen(description));
 343         fputs("</span></td></tr>", fp);
 344         if (cloneurl[0]) {
 345                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 346                 xmlencode(fp, cloneurl, strlen(cloneurl));
 347                 fputs("\">", fp);
 348                 xmlencode(fp, cloneurl, strlen(cloneurl));
 349                 fputs("</a></td></tr>", fp);
 350         }
 351         fputs("<tr><td></td><td>\n", fp);
 352         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 353         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 354         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 355         if (hassubmodules)
 356                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 357         if (hasreadme)
 358                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 359         if (haslicense)
 360                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 361         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 362 }
 363
 364 void
 365 writefooter(FILE *fp)
 366 {
 367         fputs("</div>\n</body>\n</html>\n", fp);
 368 }
 369
 370 int
 371 writeblobhtml(FILE *fp, const git_blob *blob)
 372 {
 373         size_t n = 0, i, prev;
 374         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 375         const char *s = git_blob_rawcontent(blob);
 376         git_off_t len = git_blob_rawsize(blob);
 377
 378         fputs("<pre id=\"blob\">\n", fp);
 379
 380         if (len > 0) {
 381                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 382                         if (s[i] != '\n')
 383                                 continue;
 384                         n++;
 385                         fprintf(fp, nfmt, n, n, n);
 386                         xmlencode(fp, &s[prev], i - prev + 1);
 387                         prev = i + 1;
 388                 }
 389                 /* trailing data */
 390                 if ((len - prev) > 0) {
 391                         n++;
 392                         fprintf(fp, nfmt, n, n, n);
 393                         xmlencode(fp, &s[prev], len - prev);
 394                 }
 395         }
 396
 397         fputs("</pre>\n", fp);
 398
 399         return n;
 400 }
 401
 402 void
 403 printcommit(FILE *fp, struct commitinfo *ci)
 404 {
 405         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 406                 relpath, ci->oid, ci->oid);
 407
 408         if (ci->parentoid[0])
 409                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 410                         relpath, ci->parentoid, ci->parentoid);
 411
 412         if (ci->author) {
 413                 fputs("<b>Author:</b> ", fp);
 414                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 415                 fputs(" &lt;<a href=\"mailto:", fp);
 416                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 417                 fputs("\">", fp);
 418                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 419                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 420                 printtime(fp, &(ci->author->when));
 421                 fputc('\n', fp);
 422         }
 423         if (ci->msg) {
 424                 fputc('\n', fp);
 425                 xmlencode(fp, ci->msg, strlen(ci->msg));
 426                 fputc('\n', fp);
 427         }
 428 }
 429
 430 void
 431 printshowfile(FILE *fp, struct commitinfo *ci)
 432 {
 433         const git_diff_delta *delta;
 434         const git_diff_hunk *hunk;
 435         const git_diff_line *line;
 436         git_patch *patch;
 437         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 438         char linestr[80];
 439
 440         printcommit(fp, ci);
 441
 442         if (!ci->deltas)
 443                 return;
 444
 445         if (ci->filecount > 1000   ||
 446             ci->ndeltas   > 1000   ||
 447             ci->addcount  > 100000 ||
 448             ci->delcount  > 100000) {
 449                 fputs("Diff is too large, output suppressed.\n", fp);
 450                 return;
 451         }
 452
 453         /* diff stat */
 454         fputs("<b>Diffstat:</b>\n<table>", fp);
 455         for (i = 0; i < ci->ndeltas; i++) {
 456                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 457                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 458                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 459                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 460                         fputs(" -&gt; ", fp);
 461                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 462                 }
 463
 464                 add = ci->deltas[i]->addcount;
 465                 del = ci->deltas[i]->delcount;
 466                 changed = add + del;
 467                 total = sizeof(linestr) - 2;
 468                 if (changed > total) {
 469                         if (add)
 470                                 add = ((float)total / changed * add) + 1;
 471                         if (del)
 472                                 del = ((float)total / changed * del) + 1;
 473                 }
 474                 memset(&linestr, '+', add);
 475                 memset(&linestr[add], '-', del);
 476
 477                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 478                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 479                 fwrite(&linestr, 1, add, fp);
 480                 fputs("</span><span class=\"d\">", fp);
 481                 fwrite(&linestr[add], 1, del, fp);
 482                 fputs("</span></td></tr>\n", fp);
 483         }
 484         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 485                 ci->filecount, ci->filecount == 1 ? "" : "s",
 486                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 487                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 488
 489         fputs("<hr/>", fp);
 490
 491         for (i = 0; i < ci->ndeltas; i++) {
 492                 patch = ci->deltas[i]->patch;
 493                 delta = git_patch_get_delta(patch);
 494                 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",
 495                         i, relpath, delta->old_file.path, delta->old_file.path,
 496                         relpath, delta->new_file.path, delta->new_file.path);
 497
 498                 /* check binary data */
 499                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 500                         fputs("Binary files differ.\n", fp);
 501                         continue;
 502                 }
 503
 504                 nhunks = git_patch_num_hunks(patch);
 505                 for (j = 0; j < nhunks; j++) {
 506                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 507                                 break;
 508
 509                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 510                         xmlencode(fp, hunk->header, hunk->header_len);
 511                         fputs("</a>", fp);
 512
 513                         for (k = 0; ; k++) {
 514                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 515                                         break;
 516                                 if (line->old_lineno == -1)
 517                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 518                                                 i, j, k, i, j, k);
 519                                 else if (line->new_lineno == -1)
 520                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 521                                                 i, j, k, i, j, k);
 522                                 else
 523                                         fputc(' ', fp);
 524                                 xmlencode(fp, line->content, line->content_len);
 525                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 526                                         fputs("</a>", fp);
 527                         }
 528                 }
 529         }
 530 }
 531
 532 void
 533 writelogline(FILE *fp, struct commitinfo *ci)
 534 {
 535         fputs("<tr><td>", fp);
 536         if (ci->author)
 537                 printtimeshort(fp, &(ci->author->when));
 538         fputs("</td><td>", fp);
 539         if (ci->summary) {
 540                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 541                 xmlencode(fp, ci->summary, strlen(ci->summary));
 542                 fputs("</a>", fp);
 543         }
 544         fputs("</td><td>", fp);
 545         if (ci->author)
 546                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 547         fputs("</td><td class=\"num\" align=\"right\">", fp);
 548         fprintf(fp, "%zu", ci->filecount);
 549         fputs("</td><td class=\"num\" align=\"right\">", fp);
 550         fprintf(fp, "+%zu", ci->addcount);
 551         fputs("</td><td class=\"num\" align=\"right\">", fp);
 552         fprintf(fp, "-%zu", ci->delcount);
 553         fputs("</td></tr>\n", fp);
 554 }
 555
 556 int
 557 writelog(FILE *fp, const git_oid *oid)
 558 {
 559         struct commitinfo *ci;
 560         git_revwalk *w = NULL;
 561         git_oid id;
 562         char path[PATH_MAX];
 563         FILE *fpfile;
 564         int r;
 565
 566         git_revwalk_new(&w, repo);
 567         git_revwalk_push(w, oid);
 568         git_revwalk_sorting(w, GIT_SORT_TIME);
 569         git_revwalk_simplify_first_parent(w);
 570
 571         while (!git_revwalk_next(&id, w)) {
 572                 relpath = "";
 573
 574                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 575                         break;
 576                 if (!(ci = commitinfo_getbyoid(&id)))
 577                         break;
 578
 579                 writelogline(fp, ci);
 580                 if (cachefile)
 581                         writelogline(wcachefp, ci);
 582
 583                 relpath = "../";
 584
 585                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 586                 if (r == -1 || (size_t)r >= sizeof(path))
 587                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 588
 589                 /* check if file exists if so skip it */
 590                 if (access(path, F_OK)) {
 591                         fpfile = efopen(path, "w");
 592                         writeheader(fpfile, ci->summary);
 593                         fputs("<pre>", fpfile);
 594                         printshowfile(fpfile, ci);
 595                         fputs("</pre>\n", fpfile);
 596                         writefooter(fpfile);
 597                         fclose(fpfile);
 598                 }
 599                 commitinfo_free(ci);
 600         }
 601         git_revwalk_free(w);
 602
 603         relpath = "";
 604
 605         return 0;
 606 }
 607
 608 void
 609 printcommitatom(FILE *fp, struct commitinfo *ci)
 610 {
 611         fputs("<entry>\n", fp);
 612
 613         fprintf(fp, "<id>%s</id>\n", ci->oid);
 614         if (ci->author) {
 615                 fputs("<published>", fp);
 616                 printtimez(fp, &(ci->author->when));
 617                 fputs("</published>\n", fp);
 618         }
 619         if (ci->committer) {
 620                 fputs("<updated>", fp);
 621                 printtimez(fp, &(ci->committer->when));
 622                 fputs("</updated>\n", fp);
 623         }
 624         if (ci->summary) {
 625                 fputs("<title type=\"text\">", fp);
 626                 xmlencode(fp, ci->summary, strlen(ci->summary));
 627                 fputs("</title>\n", fp);
 628         }
 629         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 630                 ci->oid);
 631
 632         if (ci->author) {
 633                 fputs("<author><name>", fp);
 634                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 635                 fputs("</name>\n<email>", fp);
 636                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 637                 fputs("</email>\n</author>\n", fp);
 638         }
 639
 640         fputs("<content type=\"text\">", fp);
 641         fprintf(fp, "commit %s\n", ci->oid);
 642         if (ci->parentoid[0])
 643                 fprintf(fp, "parent %s\n", ci->parentoid);
 644         if (ci->author) {
 645                 fputs("Author: ", fp);
 646                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 647                 fputs(" &lt;", fp);
 648                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 649                 fputs("&gt;\nDate:   ", fp);
 650                 printtime(fp, &(ci->author->when));
 651                 fputc('\n', fp);
 652         }
 653         if (ci->msg) {
 654                 fputc('\n', fp);
 655                 xmlencode(fp, ci->msg, strlen(ci->msg));
 656         }
 657         fputs("\n</content>\n</entry>\n", fp);
 658 }
 659
 660 int
 661 writeatom(FILE *fp)
 662 {
 663         struct commitinfo *ci;
 664         git_revwalk *w = NULL;
 665         git_oid id;
 666         size_t i, m = 100; /* last 'm' commits */
 667
 668         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 669               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 670         xmlencode(fp, strippedname, strlen(strippedname));
 671         fputs(", branch HEAD</title>\n<subtitle>", fp);
 672         xmlencode(fp, description, strlen(description));
 673         fputs("</subtitle>\n", fp);
 674
 675         git_revwalk_new(&w, repo);
 676         git_revwalk_push_head(w);
 677         git_revwalk_sorting(w, GIT_SORT_TIME);
 678         git_revwalk_simplify_first_parent(w);
 679
 680         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 681                 if (!(ci = commitinfo_getbyoid(&id)))
 682                         break;
 683                 printcommitatom(fp, ci);
 684                 commitinfo_free(ci);
 685         }
 686         git_revwalk_free(w);
 687
 688         fputs("</feed>\n", fp);
 689
 690         return 0;
 691 }
 692
 693 int
 694 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 695 {
 696         char tmp[PATH_MAX] = "", *d;
 697         const char *p;
 698         int lc = 0;
 699         FILE *fp;
 700
 701         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 702                 errx(1, "path truncated: '%s'", fpath);
 703         if (!(d = dirname(tmp)))
 704                 err(1, "dirname");
 705         if (mkdirp(d))
 706                 return -1;
 707
 708         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 709                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 710                         errx(1, "path truncated: '../%s'", tmp);
 711         }
 712         relpath = tmp;
 713
 714         fp = efopen(fpath, "w");
 715         writeheader(fp, filename);
 716         fputs("<p> ", fp);
 717         xmlencode(fp, filename, strlen(filename));
 718         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 719         fputs("</p><hr/>", fp);
 720
 721         if (git_blob_is_binary((git_blob *)obj)) {
 722                 fputs("<p>Binary file.</p>\n", fp);
 723         } else {
 724                 lc = writeblobhtml(fp, (git_blob *)obj);
 725                 if (ferror(fp))
 726                         err(1, "fwrite");
 727         }
 728         writefooter(fp);
 729         fclose(fp);
 730
 731         relpath = "";
 732
 733         return lc;
 734 }
 735
 736 const char *
 737 filemode(git_filemode_t m)
 738 {
 739         static char mode[11];
 740
 741         memset(mode, '-', sizeof(mode) - 1);
 742         mode[10] = '\0';
 743
 744         if (S_ISREG(m))
 745                 mode[0] = '-';
 746         else if (S_ISBLK(m))
 747                 mode[0] = 'b';
 748         else if (S_ISCHR(m))
 749                 mode[0] = 'c';
 750         else if (S_ISDIR(m))
 751                 mode[0] = 'd';
 752         else if (S_ISFIFO(m))
 753                 mode[0] = 'p';
 754         else if (S_ISLNK(m))
 755                 mode[0] = 'l';
 756         else if (S_ISSOCK(m))
 757                 mode[0] = 's';
 758         else
 759                 mode[0] = '?';
 760
 761         if (m & S_IRUSR) mode[1] = 'r';
 762         if (m & S_IWUSR) mode[2] = 'w';
 763         if (m & S_IXUSR) mode[3] = 'x';
 764         if (m & S_IRGRP) mode[4] = 'r';
 765         if (m & S_IWGRP) mode[5] = 'w';
 766         if (m & S_IXGRP) mode[6] = 'x';
 767         if (m & S_IROTH) mode[7] = 'r';
 768         if (m & S_IWOTH) mode[8] = 'w';
 769         if (m & S_IXOTH) mode[9] = 'x';
 770
 771         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 772         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 773         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 774
 775         return mode;
 776 }
 777
 778 int
 779 writefilestree(FILE *fp, git_tree *tree, const char *path)
 780 {
 781         const git_tree_entry *entry = NULL;
 782         git_submodule *module = NULL;
 783         git_object *obj = NULL;
 784         git_off_t filesize;
 785         const char *entryname;
 786         char filepath[PATH_MAX], entrypath[PATH_MAX];
 787         size_t count, i;
 788         int lc, r, ret;
 789
 790         count = git_tree_entrycount(tree);
 791         for (i = 0; i < count; i++) {
 792                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 793                     !(entryname = git_tree_entry_name(entry)))
 794                         return -1;
 795                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 796
 797                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 798                          entrypath);
 799                 if (r == -1 || (size_t)r >= sizeof(filepath))
 800                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 801
 802                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 803                         switch (git_object_type(obj)) {
 804                         case GIT_OBJ_BLOB:
 805                                 break;
 806                         case GIT_OBJ_TREE:
 807                                 /* NOTE: recurses */
 808                                 ret = writefilestree(fp, (git_tree *)obj,
 809                                                      entrypath);
 810                                 git_object_free(obj);
 811                                 if (ret)
 812                                         return ret;
 813                                 continue;
 814                         default:
 815                                 git_object_free(obj);
 816                                 continue;
 817                         }
 818
 819                         filesize = git_blob_rawsize((git_blob *)obj);
 820                         lc = writeblob(obj, filepath, entryname, filesize);
 821
 822                         fputs("<tr><td>", fp);
 823                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 824                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 825                         xmlencode(fp, entrypath, strlen(entrypath));
 826                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 827                         if (lc > 0)
 828                                 fprintf(fp, "%dL", lc);
 829                         else
 830                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 831                         fputs("</td></tr>\n", fp);
 832                         git_object_free(obj);
 833                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 834                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 835                                 relpath);
 836                         xmlencode(fp, entrypath, strlen(entrypath));
 837                         git_submodule_free(module);
 838                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 839                 }
 840         }
 841
 842         return 0;
 843 }
 844
 845 int
 846 writefiles(FILE *fp, const git_oid *id)
 847 {
 848         git_tree *tree = NULL;
 849         git_commit *commit = NULL;
 850         int ret = -1;
 851
 852         fputs("<table id=\"files\"><thead>\n<tr>"
 853               "<td><b>Mode</b></td><td><b>Name</b></td>"
 854               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 855               "</tr>\n</thead><tbody>\n", fp);
 856
 857         if (!git_commit_lookup(&commit, repo, id) &&
 858             !git_commit_tree(&tree, commit))
 859                 ret = writefilestree(fp, tree, "");
 860
 861         fputs("</tbody></table>", fp);
 862
 863         git_commit_free(commit);
 864         git_tree_free(tree);
 865
 866         return ret;
 867 }
 868
 869 int
 870 refs_cmp(const void *v1, const void *v2)
 871 {
 872         git_reference *r1 = (*(git_reference **)v1);
 873         git_reference *r2 = (*(git_reference **)v2);
 874         int r;
 875
 876         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 877                 return r;
 878
 879         return strcmp(git_reference_shorthand(r1),
 880                       git_reference_shorthand(r2));
 881 }
 882
 883 int
 884 writerefs(FILE *fp)
 885 {
 886         struct commitinfo *ci;
 887         const git_oid *id = NULL;
 888         git_object *obj = NULL;
 889         git_reference *dref = NULL, *r, *ref = NULL;
 890         git_reference_iterator *it = NULL;
 891         git_reference **refs = NULL;
 892         size_t count, i, j, refcount;
 893         const char *titles[] = { "Branches", "Tags" };
 894         const char *ids[] = { "branches", "tags" };
 895         const char *name;
 896
 897         if (git_reference_iterator_new(&it, repo))
 898                 return -1;
 899
 900         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 901                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 902                         err(1, "realloc");
 903                 refs[refcount] = ref;
 904         }
 905         git_reference_iterator_free(it);
 906
 907         /* sort by type then shorthand name */
 908         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 909
 910         for (j = 0; j < 2; j++) {
 911                 for (i = 0, count = 0; i < refcount; i++) {
 912                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 913                             !(git_reference_is_tag(refs[i]) && j == 1))
 914                                 continue;
 915
 916                         switch (git_reference_type(refs[i])) {
 917                         case GIT_REF_SYMBOLIC:
 918                                 if (git_reference_resolve(&dref, refs[i]))
 919                                         goto err;
 920                                 r = dref;
 921                                 break;
 922                         case GIT_REF_OID:
 923                                 r = refs[i];
 924                                 break;
 925                         default:
 926                                 continue;
 927                         }
 928                         if (!git_reference_target(r) ||
 929                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 930                                 goto err;
 931                         if (!(id = git_object_id(obj)))
 932                                 goto err;
 933                         if (!(ci = commitinfo_getbyoid(id)))
 934                                 break;
 935
 936                         /* print header if it has an entry (first). */
 937                         if (++count == 1) {
 938                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 939                                         "<thead>\n<tr><td><b>Name</b></td>"
 940                                         "<td><b>Last commit date</b></td>"
 941                                         "<td><b>Author</b></td>\n</tr>\n"
 942                                         "</thead><tbody>\n",
 943                                          titles[j], ids[j]);
 944                         }
 945
 946                         relpath = "";
 947                         name = git_reference_shorthand(r);
 948
 949                         fputs("<tr><td>", fp);
 950                         xmlencode(fp, name, strlen(name));
 951                         fputs("</td><td>", fp);
 952                         if (ci->author)
 953                                 printtimeshort(fp, &(ci->author->when));
 954                         fputs("</td><td>", fp);
 955                         if (ci->author)
 956                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 957                         fputs("</td></tr>\n", fp);
 958
 959                         relpath = "../";
 960
 961                         commitinfo_free(ci);
 962                         git_object_free(obj);
 963                         obj = NULL;
 964                         git_reference_free(dref);
 965                         dref = NULL;
 966                 }
 967                 /* table footer */
 968                 if (count)
 969                         fputs("</tbody></table><br/>", fp);
 970         }
 971
 972 err:
 973         git_object_free(obj);
 974         git_reference_free(dref);
 975
 976         for (i = 0; i < refcount; i++)
 977                 git_reference_free(refs[i]);
 978         free(refs);
 979
 980         return 0;
 981 }
 982
 983 void
 984 usage(char *argv0)
 985 {
 986         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
 987         exit(1);
 988 }
 989
 990 int
 991 main(int argc, char *argv[])
 992 {
 993         git_object *obj = NULL;
 994         const git_oid *head = NULL;
 995         const git_error *e = NULL;
 996         FILE *fp, *fpread;
 997         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
 998         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
 999         size_t n;
1000         int i, fd;
1001
1002         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1003                 err(1, "pledge");
1004
1005         for (i = 1; i < argc; i++) {
1006                 if (argv[i][0] != '-') {
1007                         if (repodir)
1008                                 usage(argv[0]);
1009                         repodir = argv[i];
1010                 } else if (argv[i][1] == 'c') {
1011                         if (i + 1 >= argc)
1012                                 usage(argv[0]);
1013                         cachefile = argv[++i];
1014                 }
1015         }
1016         if (!repodir)
1017                 usage(argv[0]);
1018
1019         if (!realpath(repodir, repodirabs))
1020                 err(1, "realpath");
1021
1022         git_libgit2_init();
1023
1024         if (git_repository_open_ext(&repo, repodir,
1025                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1026                 e = giterr_last();
1027                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1028                 return 1;
1029         }
1030
1031         /* find HEAD */
1032         if (!git_revparse_single(&obj, repo, "HEAD"))
1033                 head = git_object_id(obj);
1034         git_object_free(obj);
1035
1036         /* don't cache if there is no HEAD */
1037         if (!head)
1038                 cachefile = NULL;
1039
1040         /* use directory name as name */
1041         if ((name = strrchr(repodirabs, '/')))
1042                 name++;
1043         else
1044                 name = "";
1045
1046         /* strip .git suffix */
1047         if (!(strippedname = strdup(name)))
1048                 err(1, "strdup");
1049         if ((p = strrchr(strippedname, '.')))
1050                 if (!strcmp(p, ".git"))
1051                         *p = '\0';
1052
1053         /* read description or .git/description */
1054         joinpath(path, sizeof(path), repodir, "description");
1055         if (!(fpread = fopen(path, "r"))) {
1056                 joinpath(path, sizeof(path), repodir, ".git/description");
1057                 fpread = fopen(path, "r");
1058         }
1059         if (fpread) {
1060                 if (!fgets(description, sizeof(description), fpread))
1061                         description[0] = '\0';
1062                 fclose(fpread);
1063         }
1064
1065         /* read url or .git/url */
1066         joinpath(path, sizeof(path), repodir, "url");
1067         if (!(fpread = fopen(path, "r"))) {
1068                 joinpath(path, sizeof(path), repodir, ".git/url");
1069                 fpread = fopen(path, "r");
1070         }
1071         if (fpread) {
1072                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1073                         cloneurl[0] = '\0';
1074                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1075                 fclose(fpread);
1076         }
1077
1078         /* check LICENSE */
1079         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1080                 git_object_type(obj) == GIT_OBJ_BLOB);
1081         git_object_free(obj);
1082
1083         /* check README */
1084         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1085                 git_object_type(obj) == GIT_OBJ_BLOB);
1086         git_object_free(obj);
1087
1088         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1089                 git_object_type(obj) == GIT_OBJ_BLOB);
1090         git_object_free(obj);
1091
1092         /* log for HEAD */
1093         fp = efopen("log.html", "w");
1094         relpath = "";
1095         mkdir("commit", 0755);
1096         writeheader(fp, "Log");
1097         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1098               "<td><b>Commit message</b></td>"
1099               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1100               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1101               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1102
1103         if (cachefile) {
1104                 /* read from cache file (does not need to exist) */
1105                 if ((rcachefp = fopen(cachefile, "r"))) {
1106                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1107                                 errx(1, "%s: no object id", cachefile);
1108                         if (git_oid_fromstr(&lastoid, lastoidstr))
1109                                 errx(1, "%s: invalid object id", cachefile);
1110                 }
1111
1112                 /* write log to (temporary) cache */
1113                 if ((fd = mkstemp(tmppath)) == -1)
1114                         err(1, "mkstemp");
1115                 if (!(wcachefp = fdopen(fd, "w")))
1116                         err(1, "fdopen");
1117                 /* write last commit id (HEAD) */
1118                 git_oid_tostr(buf, sizeof(buf), head);
1119                 fprintf(wcachefp, "%s\n", buf);
1120
1121                 writelog(fp, head);
1122
1123                 if (rcachefp) {
1124                         /* append previous log to log.html and the new cache */
1125                         while (!feof(rcachefp)) {
1126                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1127                                 if (ferror(rcachefp))
1128                                         err(1, "fread");
1129                                 if (fwrite(buf, 1, n, fp) != n ||
1130                                     fwrite(buf, 1, n, wcachefp) != n)
1131                                         err(1, "fwrite");
1132                         }
1133                         fclose(rcachefp);
1134                 }
1135                 fclose(wcachefp);
1136         } else {
1137                 if (head)
1138                         writelog(fp, head);
1139         }
1140
1141         fputs("</tbody></table>", fp);
1142         writefooter(fp);
1143         fclose(fp);
1144
1145         /* files for HEAD */
1146         fp = efopen("files.html", "w");
1147         writeheader(fp, "Files");
1148         if (head)
1149                 writefiles(fp, head);
1150         writefooter(fp);
1151         fclose(fp);
1152
1153         /* summary page with branches and tags */
1154         fp = efopen("refs.html", "w");
1155         writeheader(fp, "Refs");
1156         writerefs(fp);
1157         writefooter(fp);
1158         fclose(fp);
1159
1160         /* Atom feed */
1161         fp = efopen("atom.xml", "w");
1162         writeatom(fp);
1163         fclose(fp);
1164
1165         /* rename new cache file on success */
1166         if (cachefile && rename(tmppath, cachefile))
1167                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1168
1169         /* cleanup */
1170         git_repository_free(repo);
1171         git_libgit2_shutdown();
1172
1173         return 0;
1174 }