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 #include "config.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 *stripped_name;
  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 void
  68 deltainfo_free(struct deltainfo *di)
  69 {
  70         if (!di)
  71                 return;
  72         git_patch_free(di->patch);
  73         di->patch = NULL;
  74         free(di);
  75 }
  76
  77 int
  78 commitinfo_getstats(struct commitinfo *ci)
  79 {
  80         struct deltainfo *di;
  81         const git_diff_delta *delta;
  82         const git_diff_hunk *hunk;
  83         const git_diff_line *line;
  84         git_patch *patch = NULL;
  85         size_t ndeltas, nhunks, nhunklines;
  86         size_t i, j, k;
  87
  88         ndeltas = git_diff_num_deltas(ci->diff);
  89         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
  90                 err(1, "calloc");
  91
  92         for (i = 0; i < ndeltas; i++) {
  93                 if (!(di = calloc(1, sizeof(struct deltainfo))))
  94                         err(1, "calloc");
  95                 if (git_patch_from_diff(&patch, ci->diff, i)) {
  96                         git_patch_free(patch);
  97                         goto err;
  98                 }
  99                 di->patch = patch;
 100                 ci->deltas[i] = di;
 101
 102                 delta = git_patch_get_delta(patch);
 103
 104                 /* check binary data */
 105                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 106                         continue;
 107
 108                 nhunks = git_patch_num_hunks(patch);
 109                 for (j = 0; j < nhunks; j++) {
 110                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 111                                 break;
 112                         for (k = 0; ; k++) {
 113                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 114                                         break;
 115                                 if (line->old_lineno == -1) {
 116                                         di->addcount++;
 117                                         ci->addcount++;
 118                                 } else if (line->new_lineno == -1) {
 119                                         di->delcount++;
 120                                         ci->delcount++;
 121                                 }
 122                         }
 123                 }
 124         }
 125         ci->ndeltas = i;
 126         ci->filecount = i;
 127
 128         return 0;
 129
 130 err:
 131         if (ci->deltas)
 132                 for (i = 0; i < ci->ndeltas; i++)
 133                         deltainfo_free(ci->deltas[i]);
 134         free(ci->deltas);
 135         ci->deltas = NULL;
 136         ci->ndeltas = 0;
 137         ci->addcount = 0;
 138         ci->delcount = 0;
 139         ci->filecount = 0;
 140
 141         return -1;
 142 }
 143
 144 void
 145 commitinfo_free(struct commitinfo *ci)
 146 {
 147         size_t i;
 148
 149         if (!ci)
 150                 return;
 151         if (ci->deltas)
 152                 for (i = 0; i < ci->ndeltas; i++)
 153                         deltainfo_free(ci->deltas[i]);
 154         free(ci->deltas);
 155         ci->deltas = NULL;
 156         git_diff_free(ci->diff);
 157         git_tree_free(ci->commit_tree);
 158         git_tree_free(ci->parent_tree);
 159         git_commit_free(ci->commit);
 160 }
 161
 162 struct commitinfo *
 163 commitinfo_getbyoid(const git_oid *id)
 164 {
 165         struct commitinfo *ci;
 166         git_diff_options opts;
 167
 168         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 169                 err(1, "calloc");
 170
 171         if (git_commit_lookup(&(ci->commit), repo, id))
 172                 goto err;
 173         ci->id = id;
 174
 175         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 176         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 177
 178         ci->author = git_commit_author(ci->commit);
 179         ci->committer = git_commit_committer(ci->commit);
 180         ci->summary = git_commit_summary(ci->commit);
 181         ci->msg = git_commit_message(ci->commit);
 182
 183         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 184                 goto err;
 185         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 186                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 187                         ci->parent = NULL;
 188                         ci->parent_tree = NULL;
 189                 }
 190         }
 191
 192         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 193         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 194         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 195                 goto err;
 196         if (commitinfo_getstats(ci) == -1)
 197                 goto err;
 198
 199         return ci;
 200
 201 err:
 202         commitinfo_free(ci);
 203         free(ci);
 204
 205         return NULL;
 206 }
 207
 208 FILE *
 209 efopen(const char *name, const char *flags)
 210 {
 211         FILE *fp;
 212
 213         if (!(fp = fopen(name, flags)))
 214                 err(1, "fopen");
 215
 216         return fp;
 217 }
 218
 219 /* Escape characters below as HTML 2.0 / XML 1.0. */
 220 void
 221 xmlencode(FILE *fp, const char *s, size_t len)
 222 {
 223         size_t i;
 224
 225         for (i = 0; *s && i < len; s++, i++) {
 226                 switch(*s) {
 227                 case '<':  fputs("&lt;",   fp); break;
 228                 case '>':  fputs("&gt;",   fp); break;
 229                 case '\'': fputs("&apos;", fp); break;
 230                 case '&':  fputs("&amp;",  fp); break;
 231                 case '"':  fputs("&quot;", fp); break;
 232                 default:   fputc(*s, fp);
 233                 }
 234         }
 235 }
 236
 237 /* Some implementations of dirname(3) return a pointer to a static
 238  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 239  * This is a wrapper function that is compatible with both versions.
 240  * The program will error out if dirname(3) failed, this can only happen
 241  * with the OpenBSD version. */
 242 char *
 243 xdirname(const char *path)
 244 {
 245         char *p, *b;
 246
 247         if (!(p = strdup(path)))
 248                 err(1, "strdup");
 249         if (!(b = dirname(p)))
 250                 err(1, "dirname");
 251         if (!(b = strdup(b)))
 252                 err(1, "strdup");
 253         free(p);
 254
 255         return b;
 256 }
 257
 258 int
 259 mkdirp(const char *path)
 260 {
 261         char tmp[PATH_MAX], *p;
 262
 263         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 264                 errx(1, "path truncated: '%s'", path);
 265         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 266                 if (*p != '/')
 267                         continue;
 268                 *p = '\0';
 269                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 270                         return -1;
 271                 *p = '/';
 272         }
 273         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 274                 return -1;
 275         return 0;
 276 }
 277
 278 void
 279 printtimez(FILE *fp, const git_time *intime)
 280 {
 281         struct tm *intm;
 282         time_t t;
 283         char out[32];
 284
 285         t = (time_t)intime->time;
 286         if (!(intm = gmtime(&t)))
 287                 return;
 288         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 289         fputs(out, fp);
 290 }
 291
 292 void
 293 printtime(FILE *fp, const git_time *intime)
 294 {
 295         struct tm *intm;
 296         time_t t;
 297         int offset, sign = '+';
 298         char out[32];
 299
 300         offset = intime->offset * 60;
 301         t = (time_t)intime->time + offset;
 302         if (!(intm = gmtime(&t)))
 303                 return;
 304         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 305         if (offset < 0) {
 306                 offset = -offset;
 307                 sign = '-';
 308         }
 309         fprintf(fp, "%s %c%02d%02d", out, sign, offset / 60, 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 int
 327 writeheader(FILE *fp, const char *title)
 328 {
 329         fputs("<!DOCTYPE html>\n"
 330                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 331                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 332                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 333         xmlencode(fp, title, strlen(title));
 334         if (title[0] && stripped_name[0])
 335                 fputs(" - ", fp);
 336         xmlencode(fp, stripped_name, strlen(stripped_name));
 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, stripped_name, strlen(stripped_name));
 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         return 0;
 372 }
 373
 374 int
 375 writefooter(FILE *fp)
 376 {
 377         return !fputs("</div>\n</body>\n</html>\n", fp);
 378 }
 379
 380 int
 381 writeblobhtml(FILE *fp, const git_blob *blob)
 382 {
 383         off_t i;
 384         size_t n = 0;
 385         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 386         const char *s = git_blob_rawcontent(blob);
 387         git_off_t len = git_blob_rawsize(blob);
 388
 389         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 390
 391         if (len) {
 392                 n++;
 393                 fprintf(fp, nfmt, n, n, n);
 394                 for (i = 0; i < len - 1; i++) {
 395                         if (s[i] == '\n') {
 396                                 n++;
 397                                 fprintf(fp, nfmt, n, n, n);
 398                         }
 399                 }
 400         }
 401
 402         fputs("</pre></td><td><pre>\n", fp);
 403         xmlencode(fp, s, (size_t)len);
 404         fputs("</pre></td></tr></table>\n", fp);
 405
 406         return n;
 407 }
 408
 409 void
 410 printcommit(FILE *fp, struct commitinfo *ci)
 411 {
 412         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 413                 relpath, ci->oid, ci->oid);
 414
 415         if (ci->parentoid[0])
 416                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 417                         relpath, ci->parentoid, ci->parentoid);
 418
 419         if (ci->author) {
 420                 fputs("<b>Author:</b> ", fp);
 421                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 422                 fputs(" &lt;<a href=\"mailto:", fp);
 423                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 424                 fputs("\">", fp);
 425                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 426                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 427                 printtime(fp, &(ci->author->when));
 428                 fputc('\n', fp);
 429         }
 430         if (ci->msg) {
 431                 fputc('\n', fp);
 432                 xmlencode(fp, ci->msg, strlen(ci->msg));
 433                 fputc('\n', fp);
 434         }
 435 }
 436
 437 void
 438 printshowfile(FILE *fp, struct commitinfo *ci)
 439 {
 440         const git_diff_delta *delta;
 441         const git_diff_hunk *hunk;
 442         const git_diff_line *line;
 443         git_patch *patch;
 444         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 445         char linestr[80];
 446
 447         printcommit(fp, ci);
 448
 449         if (!ci->deltas)
 450                 return;
 451
 452         if (ci->filecount > 1000   ||
 453             ci->ndeltas   > 1000   ||
 454             ci->addcount  > 100000 ||
 455             ci->delcount  > 100000) {
 456                 fprintf(fp, "(diff is too large, output suppressed)");
 457                 return;
 458         }
 459
 460         /* diff stat */
 461         fputs("<b>Diffstat:</b>\n<table>", fp);
 462         for (i = 0; i < ci->ndeltas; i++) {
 463                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 464                 fputs("<tr><td>", fp);
 465                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 466                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 467                         fputs(" -&gt; ", fp);
 468                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 469                 }
 470
 471                 add = ci->deltas[i]->addcount;
 472                 del = ci->deltas[i]->delcount;
 473                 changed = add + del;
 474                 total = sizeof(linestr) - 2;
 475                 if (changed > total) {
 476                         if (add)
 477                                 add = ((float)total / changed * add) + 1;
 478                         if (del)
 479                                 del = ((float)total / changed * del) + 1;
 480                 }
 481                 memset(&linestr, '+', add);
 482                 memset(&linestr[add], '-', del);
 483
 484                 fprintf(fp, "</td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 485                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 486                 fwrite(&linestr, 1, add, fp);
 487                 fputs("</span><span class=\"d\">", fp);
 488                 fwrite(&linestr[add], 1, del, fp);
 489                 fputs("</span></td></tr>\n", fp);
 490         }
 491         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 492                 ci->filecount, ci->filecount == 1 ? "" : "s",
 493                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 494                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 495
 496         fputs("<hr/>", fp);
 497
 498         for (i = 0; i < ci->ndeltas; i++) {
 499                 patch = ci->deltas[i]->patch;
 500                 delta = git_patch_get_delta(patch);
 501                 fprintf(fp, "<b>diff --git a/<a href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 502                         relpath, delta->old_file.path, delta->old_file.path,
 503                         relpath, delta->new_file.path, delta->new_file.path);
 504
 505                 /* check binary data */
 506                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 507                         fputs("Binary files differ\n", fp);
 508                         continue;
 509                 }
 510
 511                 nhunks = git_patch_num_hunks(patch);
 512                 for (j = 0; j < nhunks; j++) {
 513                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 514                                 break;
 515
 516                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 517                         xmlencode(fp, hunk->header, hunk->header_len);
 518                         fputs("</a>", fp);
 519
 520                         for (k = 0; ; k++) {
 521                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 522                                         break;
 523                                 if (line->old_lineno == -1)
 524                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 525                                                 i, j, k, i, j, k);
 526                                 else if (line->new_lineno == -1)
 527                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 528                                                 i, j, k, i, j, k);
 529                                 else
 530                                         fputc(' ', fp);
 531                                 xmlencode(fp, line->content, line->content_len);
 532                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 533                                         fputs("</a>", fp);
 534                         }
 535                 }
 536         }
 537 }
 538
 539 void
 540 writelogline(FILE *fp, struct commitinfo *ci)
 541 {
 542         size_t len;
 543
 544         fputs("<tr><td>", fp);
 545         if (ci->author)
 546                 printtimeshort(fp, &(ci->author->when));
 547         fputs("</td><td>", fp);
 548         if (ci->summary) {
 549                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 550                 if ((len = strlen(ci->summary)) > summarylen) {
 551                         xmlencode(fp, ci->summary, summarylen - 1);
 552                         fputs("…", fp);
 553                 } else {
 554                         xmlencode(fp, ci->summary, len);
 555                 }
 556                 fputs("</a>", fp);
 557         }
 558         fputs("</td><td>", fp);
 559         if (ci->author)
 560                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 561         fputs("</td><td class=\"num\">", fp);
 562         fprintf(fp, "%zu", ci->filecount);
 563         fputs("</td><td class=\"num\">", fp);
 564         fprintf(fp, "+%zu", ci->addcount);
 565         fputs("</td><td class=\"num\">", fp);
 566         fprintf(fp, "-%zu", ci->delcount);
 567         fputs("</td></tr>\n", fp);
 568 }
 569
 570 int
 571 writelog(FILE *fp, const git_oid *oid)
 572 {
 573         struct commitinfo *ci;
 574         git_revwalk *w = NULL;
 575         git_oid id;
 576         char path[PATH_MAX];
 577         FILE *fpfile;
 578         int r;
 579
 580         git_revwalk_new(&w, repo);
 581         git_revwalk_push(w, oid);
 582         git_revwalk_sorting(w, GIT_SORT_TIME);
 583         git_revwalk_simplify_first_parent(w);
 584
 585         while (!git_revwalk_next(&id, w)) {
 586                 relpath = "";
 587
 588                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 589                         break;
 590                 if (!(ci = commitinfo_getbyoid(&id)))
 591                         break;
 592
 593                 writelogline(fp, ci);
 594                 if (cachefile)
 595                         writelogline(wcachefp, ci);
 596
 597                 relpath = "../";
 598
 599                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 600                 if (r == -1 || (size_t)r >= sizeof(path))
 601                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 602
 603                 /* check if file exists if so skip it */
 604                 if (access(path, F_OK)) {
 605                         fpfile = efopen(path, "w");
 606                         writeheader(fpfile, ci->summary);
 607                         fputs("<pre>", fpfile);
 608                         printshowfile(fpfile, ci);
 609                         fputs("</pre>\n", fpfile);
 610                         writefooter(fpfile);
 611                         fclose(fpfile);
 612                 }
 613                 commitinfo_free(ci);
 614         }
 615         git_revwalk_free(w);
 616
 617         relpath = "";
 618
 619         return 0;
 620 }
 621
 622 void
 623 printcommitatom(FILE *fp, struct commitinfo *ci)
 624 {
 625         fputs("<entry>\n", fp);
 626
 627         fprintf(fp, "<id>%s</id>\n", ci->oid);
 628         if (ci->author) {
 629                 fputs("<published>", fp);
 630                 printtimez(fp, &(ci->author->when));
 631                 fputs("</published>\n", fp);
 632         }
 633         if (ci->committer) {
 634                 fputs("<updated>", fp);
 635                 printtimez(fp, &(ci->committer->when));
 636                 fputs("</updated>\n", fp);
 637         }
 638         if (ci->summary) {
 639                 fputs("<title type=\"text\">", fp);
 640                 xmlencode(fp, ci->summary, strlen(ci->summary));
 641                 fputs("</title>\n", fp);
 642         }
 643         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 644                 ci->oid);
 645
 646         if (ci->author) {
 647                 fputs("<author><name>", fp);
 648                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 649                 fputs("</name>\n<email>", fp);
 650                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 651                 fputs("</email>\n</author>\n", fp);
 652         }
 653
 654         fputs("<content type=\"text\">", fp);
 655         fprintf(fp, "commit %s\n", ci->oid);
 656         if (ci->parentoid[0])
 657                 fprintf(fp, "parent %s\n", ci->parentoid);
 658         if (ci->author) {
 659                 fputs("Author: ", fp);
 660                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 661                 fputs(" &lt;", fp);
 662                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 663                 fputs("&gt;\nDate:   ", fp);
 664                 printtime(fp, &(ci->author->when));
 665                 fputc('\n', fp);
 666         }
 667         if (ci->msg) {
 668                 fputc('\n', fp);
 669                 xmlencode(fp, ci->msg, strlen(ci->msg));
 670         }
 671         fputs("\n</content>\n</entry>\n", fp);
 672 }
 673
 674 int
 675 writeatom(FILE *fp)
 676 {
 677         struct commitinfo *ci;
 678         git_revwalk *w = NULL;
 679         git_oid id;
 680         size_t i, m = 100; /* last 'm' commits */
 681
 682         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 683               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 684         xmlencode(fp, stripped_name, strlen(stripped_name));
 685         fputs(", branch HEAD</title>\n<subtitle>", fp);
 686         xmlencode(fp, description, strlen(description));
 687         fputs("</subtitle>\n", fp);
 688
 689         git_revwalk_new(&w, repo);
 690         git_revwalk_push_head(w);
 691         git_revwalk_sorting(w, GIT_SORT_TIME);
 692         git_revwalk_simplify_first_parent(w);
 693
 694         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 695                 if (!(ci = commitinfo_getbyoid(&id)))
 696                         break;
 697                 printcommitatom(fp, ci);
 698                 commitinfo_free(ci);
 699         }
 700         git_revwalk_free(w);
 701
 702         fputs("</feed>", fp);
 703
 704         return 0;
 705 }
 706
 707 int
 708 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 709 {
 710         char tmp[PATH_MAX] = "", *d;
 711         const char *p;
 712         int lc = 0;
 713         FILE *fp;
 714
 715         d = xdirname(fpath);
 716         if (mkdirp(d)) {
 717                 free(d);
 718                 return -1;
 719         }
 720         free(d);
 721
 722         p = fpath;
 723         while (*p) {
 724                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 725                         errx(1, "path truncated: '../%s'", tmp);
 726                 p++;
 727         }
 728         relpath = tmp;
 729
 730         fp = efopen(fpath, "w");
 731         writeheader(fp, filename);
 732         fputs("<p> ", fp);
 733         xmlencode(fp, filename, strlen(filename));
 734         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 735         fputs("</p><hr/>", fp);
 736
 737         if (git_blob_is_binary((git_blob *)obj)) {
 738                 fputs("<p>Binary file</p>\n", fp);
 739         } else {
 740                 lc = writeblobhtml(fp, (git_blob *)obj);
 741                 if (ferror(fp))
 742                         err(1, "fwrite");
 743         }
 744         writefooter(fp);
 745         fclose(fp);
 746
 747         relpath = "";
 748
 749         return lc;
 750 }
 751
 752 const char *
 753 filemode(git_filemode_t m)
 754 {
 755         static char mode[11];
 756
 757         memset(mode, '-', sizeof(mode) - 1);
 758         mode[10] = '\0';
 759
 760         if (S_ISREG(m))
 761                 mode[0] = '-';
 762         else if (S_ISBLK(m))
 763                 mode[0] = 'b';
 764         else if (S_ISCHR(m))
 765                 mode[0] = 'c';
 766         else if (S_ISDIR(m))
 767                 mode[0] = 'd';
 768         else if (S_ISFIFO(m))
 769                 mode[0] = 'p';
 770         else if (S_ISLNK(m))
 771                 mode[0] = 'l';
 772         else if (S_ISSOCK(m))
 773                 mode[0] = 's';
 774         else
 775                 mode[0] = '?';
 776
 777         if (m & S_IRUSR) mode[1] = 'r';
 778         if (m & S_IWUSR) mode[2] = 'w';
 779         if (m & S_IXUSR) mode[3] = 'x';
 780         if (m & S_IRGRP) mode[4] = 'r';
 781         if (m & S_IWGRP) mode[5] = 'w';
 782         if (m & S_IXGRP) mode[6] = 'x';
 783         if (m & S_IROTH) mode[7] = 'r';
 784         if (m & S_IWOTH) mode[8] = 'w';
 785         if (m & S_IXOTH) mode[9] = 'x';
 786
 787         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 788         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 789         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 790
 791         return mode;
 792 }
 793
 794 int
 795 writefilestree(FILE *fp, git_tree *tree, const char *branch, const char *path)
 796 {
 797         const git_tree_entry *entry = NULL;
 798         git_submodule *module = NULL;
 799         git_object *obj = NULL;
 800         git_off_t filesize;
 801         const char *entryname;
 802         char filepath[PATH_MAX], entrypath[PATH_MAX];
 803         size_t count, i;
 804         int lc, r, ret;
 805
 806         count = git_tree_entrycount(tree);
 807         for (i = 0; i < count; i++) {
 808                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 809                     !(entryname = git_tree_entry_name(entry)))
 810                         return -1;
 811                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 812                          path, path[0] ? "/" : "", entryname);
 813                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 814                         errx(1, "path truncated: '%s%s%s'",
 815                                 path, path[0] ? "/" : "", entryname);
 816
 817                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 818                          path, path[0] ? "/" : "", entryname);
 819                 if (r == -1 || (size_t)r >= sizeof(filepath))
 820                         errx(1, "path truncated: 'file/%s%s%s.html'",
 821                                 path, path[0] ? "/" : "", entryname);
 822
 823                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 824                         switch (git_object_type(obj)) {
 825                         case GIT_OBJ_BLOB:
 826                                 break;
 827                         case GIT_OBJ_TREE:
 828                                 /* NOTE: recurses */
 829                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 830                                                      entrypath);
 831                                 git_object_free(obj);
 832                                 if (ret)
 833                                         return ret;
 834                                 continue;
 835                         default:
 836                                 git_object_free(obj);
 837                                 continue;
 838                         }
 839
 840                         filesize = git_blob_rawsize((git_blob *)obj);
 841                         lc = writeblob(obj, filepath, entryname, filesize);
 842
 843                         fputs("<tr><td>", fp);
 844                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 845                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 846                         xmlencode(fp, entrypath, strlen(entrypath));
 847                         fputs("</a></td><td class=\"num\">", fp);
 848                         if (showlinecount && lc > 0)
 849                                 fprintf(fp, "%dL", lc);
 850                         else
 851                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 852                         fputs("</td></tr>\n", fp);
 853                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 854                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 855                                 relpath);
 856                         xmlencode(fp, entrypath, strlen(entrypath));
 857                         git_submodule_free(module);
 858                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 859                 }
 860         }
 861
 862         return 0;
 863 }
 864
 865 int
 866 writefiles(FILE *fp, const git_oid *id, const char *branch)
 867 {
 868         git_tree *tree = NULL;
 869         git_commit *commit = NULL;
 870         int ret = -1;
 871
 872         fputs("<table id=\"files\"><thead>\n<tr>"
 873               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 874               "</tr>\n</thead><tbody>\n", fp);
 875
 876         if (git_commit_lookup(&commit, repo, id) ||
 877             git_commit_tree(&tree, commit))
 878                 goto err;
 879         ret = writefilestree(fp, tree, branch, "");
 880
 881 err:
 882         fputs("</tbody></table>", fp);
 883
 884         git_commit_free(commit);
 885         git_tree_free(tree);
 886
 887         return ret;
 888 }
 889
 890 int
 891 refs_cmp(const void *v1, const void *v2)
 892 {
 893         git_reference *r1 = (*(git_reference **)v1);
 894         git_reference *r2 = (*(git_reference **)v2);
 895         int t1, t2;
 896
 897         t1 = git_reference_is_branch(r1);
 898         t2 = git_reference_is_branch(r2);
 899
 900         if (t1 != t2)
 901                 return t1 - t2;
 902
 903         return strcmp(git_reference_shorthand(r1),
 904                       git_reference_shorthand(r2));
 905 }
 906
 907 int
 908 writerefs(FILE *fp)
 909 {
 910         struct commitinfo *ci;
 911         const git_oid *id = NULL;
 912         git_object *obj = NULL;
 913         git_reference *dref = NULL, *r, *ref = NULL;
 914         git_reference_iterator *it = NULL;
 915         git_reference **refs = NULL;
 916         size_t count, i, j, refcount;
 917         const char *titles[] = { "Branches", "Tags" };
 918         const char *ids[] = { "branches", "tags" };
 919         const char *name;
 920
 921         if (git_reference_iterator_new(&it, repo))
 922                 return -1;
 923
 924         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 925                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 926                         err(1, "realloc");
 927                 refs[refcount] = ref;
 928         }
 929         git_reference_iterator_free(it);
 930
 931         /* sort by type then shorthand name */
 932         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 933
 934         for (j = 0; j < 2; j++) {
 935                 for (i = 0, count = 0; i < refcount; i++) {
 936                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 937                             !(git_reference_is_tag(refs[i]) && j == 1))
 938                                 continue;
 939
 940                         switch (git_reference_type(refs[i])) {
 941                         case GIT_REF_SYMBOLIC:
 942                                 if (git_reference_resolve(&dref, refs[i]))
 943                                         goto err;
 944                                 r = dref;
 945                                 break;
 946                         case GIT_REF_OID:
 947                                 r = refs[i];
 948                                 break;
 949                         default:
 950                                 continue;
 951                         }
 952                         if (!(id = git_reference_target(r)))
 953                                 goto err;
 954                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 955                                 goto err;
 956                         if (!(id = git_object_id(obj)))
 957                                 goto err;
 958                         if (!(ci = commitinfo_getbyoid(id)))
 959                                 break;
 960
 961                         /* print header if it has an entry (first). */
 962                         if (++count == 1) {
 963                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 964                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 965                                       titles[j], ids[j]);
 966                         }
 967
 968                         relpath = "";
 969                         name = git_reference_shorthand(r);
 970
 971                         fputs("<tr><td>", fp);
 972                         xmlencode(fp, name, strlen(name));
 973                         fputs("</td><td>", fp);
 974                         if (ci->author)
 975                                 printtimeshort(fp, &(ci->author->when));
 976                         fputs("</td><td>", fp);
 977                         if (ci->author)
 978                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 979                         fputs("</td></tr>\n", fp);
 980
 981                         relpath = "../";
 982
 983                         commitinfo_free(ci);
 984                         git_object_free(obj);
 985                         obj = NULL;
 986                         git_reference_free(dref);
 987                         dref = NULL;
 988                 }
 989                 /* table footer */
 990                 if (count)
 991                         fputs("</tbody></table><br/>", fp);
 992         }
 993
 994 err:
 995         git_object_free(obj);
 996         git_reference_free(dref);
 997
 998         for (i = 0; i < refcount; i++)
 999                 git_reference_free(refs[i]);
1000         free(refs);
1001
1002         return 0;
1003 }
1004
1005 void
1006 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
1007 {
1008         int r;
1009
1010         r = snprintf(buf, bufsiz, "%s%s%s",
1011                 repodir, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
1012         if (r == -1 || (size_t)r >= bufsiz)
1013                 errx(1, "path truncated: '%s%s%s'",
1014                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
1015 }
1016
1017 void
1018 usage(char *argv0)
1019 {
1020         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
1021         exit(1);
1022 }
1023
1024 int
1025 main(int argc, char *argv[])
1026 {
1027         git_object *obj = NULL;
1028         const git_oid *head = NULL;
1029         const git_error *e = NULL;
1030         FILE *fp, *fpread;
1031         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1032         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1033         size_t n;
1034         int i, fd;
1035
1036         for (i = 1; i < argc; i++) {
1037                 if (argv[i][0] != '-') {
1038                         if (repodir)
1039                                 usage(argv[0]);
1040                         repodir = argv[i];
1041                 } else if (argv[i][1] == 'c') {
1042                         if (i + 1 >= argc)
1043                                 usage(argv[0]);
1044                         cachefile = argv[++i];
1045                 }
1046         }
1047         if (!repodir)
1048                 usage(argv[0]);
1049
1050         if (!realpath(repodir, repodirabs))
1051                 err(1, "realpath");
1052
1053         git_libgit2_init();
1054
1055         if (git_repository_open_ext(&repo, repodir,
1056                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1057                 e = giterr_last();
1058                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1059                 return 1;
1060         }
1061
1062         /* find HEAD */
1063         if (git_revparse_single(&obj, repo, "HEAD"))
1064                 return 1;
1065         head = git_object_id(obj);
1066         git_object_free(obj);
1067
1068         /* use directory name as name */
1069         if ((name = strrchr(repodirabs, '/')))
1070                 name++;
1071         else
1072                 name = "";
1073
1074         /* strip .git suffix */
1075         if (!(stripped_name = strdup(name)))
1076                 err(1, "strdup");
1077         if ((p = strrchr(stripped_name, '.')))
1078                 if (!strcmp(p, ".git"))
1079                         *p = '\0';
1080
1081         /* read description or .git/description */
1082         joinpath(path, sizeof(path), repodir, "description");
1083         if (!(fpread = fopen(path, "r"))) {
1084                 joinpath(path, sizeof(path), repodir, ".git/description");
1085                 fpread = fopen(path, "r");
1086         }
1087         if (fpread) {
1088                 if (!fgets(description, sizeof(description), fpread))
1089                         description[0] = '\0';
1090                 fclose(fpread);
1091         }
1092
1093         /* read url or .git/url */
1094         joinpath(path, sizeof(path), repodir, "url");
1095         if (!(fpread = fopen(path, "r"))) {
1096                 joinpath(path, sizeof(path), repodir, ".git/url");
1097                 fpread = fopen(path, "r");
1098         }
1099         if (fpread) {
1100                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1101                         cloneurl[0] = '\0';
1102                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1103                 fclose(fpread);
1104         }
1105
1106         /* check LICENSE */
1107         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1108         git_object_free(obj);
1109         /* check README */
1110         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1111         git_object_free(obj);
1112         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
1113         git_object_free(obj);
1114
1115         /* log for HEAD */
1116         fp = efopen("log.html", "w");
1117         relpath = "";
1118         mkdir("commit", 0755);
1119         writeheader(fp, "Log");
1120         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1121                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1122                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1123
1124         if (cachefile) {
1125                 /* read from cache file (does not need to exist) */
1126                 if ((rcachefp = fopen(cachefile, "r"))) {
1127                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1128                                 errx(1, "%s: no object id", cachefile);
1129                         if (git_oid_fromstr(&lastoid, lastoidstr))
1130                                 errx(1, "%s: invalid object id", cachefile);
1131                 }
1132
1133                 /* write log to (temporary) cache */
1134                 if ((fd = mkstemp(tmppath)) == -1)
1135                         err(1, "mkstemp");
1136                 if (!(wcachefp = fdopen(fd, "w")))
1137                         err(1, "fdopen");
1138                 /* write last commit id (HEAD) */
1139                 git_oid_tostr(buf, sizeof(buf), head);
1140                 fprintf(wcachefp, "%s\n", buf);
1141
1142                 writelog(fp, head);
1143
1144                 if (rcachefp) {
1145                         /* append previous log to log.html and the new cache */
1146                         while (!feof(rcachefp)) {
1147                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1148                                 if (ferror(rcachefp))
1149                                         err(1, "fread");
1150                                 if (fwrite(buf, 1, n, fp) != n)
1151                                         err(1, "fwrite");
1152                                 if (fwrite(buf, 1, n, wcachefp) != n)
1153                                         err(1, "fwrite");
1154                         }
1155                         fclose(rcachefp);
1156                 }
1157                 fclose(wcachefp);
1158         } else {
1159                 writelog(fp, head);
1160         }
1161
1162         fputs("</tbody></table>", fp);
1163         writefooter(fp);
1164         fclose(fp);
1165
1166         /* files for HEAD */
1167         fp = efopen("files.html", "w");
1168         writeheader(fp, "Files");
1169         writefiles(fp, head, "HEAD");
1170         writefooter(fp);
1171         fclose(fp);
1172
1173         /* summary page with branches and tags */
1174         fp = efopen("refs.html", "w");
1175         writeheader(fp, "Refs");
1176         writerefs(fp);
1177         writefooter(fp);
1178         fclose(fp);
1179
1180         /* Atom feed */
1181         fp = efopen("atom.xml", "w");
1182         writeatom(fp);
1183         fclose(fp);
1184
1185         /* rename new cache file on success */
1186         if (cachefile && rename(tmppath, cachefile))
1187                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1188
1189         /* cleanup */
1190         git_repository_free(repo);
1191         git_libgit2_shutdown();
1192
1193         return 0;
1194 }