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 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 *stripped_name;
  56 static char description[255];
  57 static char cloneurl[1024];
  58 static int haslicense, hasreadme, hassubmodules;
  59
  60 void
  61 deltainfo_free(struct deltainfo *di)
  62 {
  63         if (!di)
  64                 return;
  65         git_patch_free(di->patch);
  66         di->patch = NULL;
  67         free(di);
  68 }
  69
  70 int
  71 commitinfo_getstats(struct commitinfo *ci)
  72 {
  73         struct deltainfo *di;
  74         const git_diff_delta *delta;
  75         const git_diff_hunk *hunk;
  76         const git_diff_line *line;
  77         git_patch *patch = NULL;
  78         size_t ndeltas, nhunks, nhunklines;
  79         size_t i, j, k;
  80
  81         ndeltas = git_diff_num_deltas(ci->diff);
  82         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
  83                 err(1, "calloc");
  84
  85         for (i = 0; i < ndeltas; i++) {
  86                 if (!(di = calloc(1, sizeof(struct deltainfo))))
  87                         err(1, "calloc");
  88                 if (git_patch_from_diff(&patch, ci->diff, i)) {
  89                         git_patch_free(patch);
  90                         goto err;
  91                 }
  92                 di->patch = patch;
  93                 ci->deltas[i] = di;
  94
  95                 delta = git_patch_get_delta(patch);
  96
  97                 /* check binary data */
  98                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
  99                         continue;
 100
 101                 nhunks = git_patch_num_hunks(patch);
 102                 for (j = 0; j < nhunks; j++) {
 103                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 104                                 break;
 105                         for (k = 0; ; k++) {
 106                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 107                                         break;
 108                                 if (line->old_lineno == -1) {
 109                                         di->addcount++;
 110                                         ci->addcount++;
 111                                 } else if (line->new_lineno == -1) {
 112                                         di->delcount++;
 113                                         ci->delcount++;
 114                                 }
 115                         }
 116                 }
 117         }
 118         ci->ndeltas = i;
 119         ci->filecount = i;
 120
 121         return 0;
 122
 123 err:
 124         if (ci->deltas)
 125                 for (i = 0; i < ci->ndeltas; i++)
 126                         deltainfo_free(ci->deltas[i]);
 127         free(ci->deltas);
 128         ci->deltas = NULL;
 129         ci->ndeltas = 0;
 130         ci->addcount = 0;
 131         ci->delcount = 0;
 132         ci->filecount = 0;
 133
 134         return -1;
 135 }
 136
 137 void
 138 commitinfo_free(struct commitinfo *ci)
 139 {
 140         size_t i;
 141
 142         if (!ci)
 143                 return;
 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         git_diff_free(ci->diff);
 150         git_tree_free(ci->commit_tree);
 151         git_tree_free(ci->parent_tree);
 152         git_commit_free(ci->commit);
 153 }
 154
 155 struct commitinfo *
 156 commitinfo_getbyoid(const git_oid *id)
 157 {
 158         struct commitinfo *ci;
 159         git_diff_options opts;
 160
 161         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 162                 err(1, "calloc");
 163
 164         if (git_commit_lookup(&(ci->commit), repo, id))
 165                 goto err;
 166         ci->id = id;
 167
 168         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 169         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 170
 171         ci->author = git_commit_author(ci->commit);
 172         ci->summary = git_commit_summary(ci->commit);
 173         ci->msg = git_commit_message(ci->commit);
 174
 175         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 176                 goto err;
 177         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 178                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 179                         ci->parent = NULL;
 180                         ci->parent_tree = NULL;
 181                 }
 182         }
 183
 184         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 185         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 186         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 187                 goto err;
 188         if (commitinfo_getstats(ci) == -1)
 189                 goto err;
 190
 191         return ci;
 192
 193 err:
 194         commitinfo_free(ci);
 195         free(ci);
 196
 197         return NULL;
 198 }
 199
 200 FILE *
 201 efopen(const char *name, const char *flags)
 202 {
 203         FILE *fp;
 204
 205         if (!(fp = fopen(name, flags)))
 206                 err(1, "fopen");
 207
 208         return fp;
 209 }
 210
 211 /* Escape characters below as HTML 2.0 / XML 1.0. */
 212 void
 213 xmlencode(FILE *fp, const char *s, size_t len)
 214 {
 215         size_t i;
 216
 217         for (i = 0; *s && i < len; s++, i++) {
 218                 switch(*s) {
 219                 case '<':  fputs("&lt;",   fp); break;
 220                 case '>':  fputs("&gt;",   fp); break;
 221                 case '\'': fputs("&apos;", fp); break;
 222                 case '&':  fputs("&amp;",  fp); break;
 223                 case '"':  fputs("&quot;", fp); break;
 224                 default:   fputc(*s, fp);
 225                 }
 226         }
 227 }
 228
 229 /* Some implementations of dirname(3) return a pointer to a static
 230  * internal buffer (OpenBSD). Others modify the contents of `path` (POSIX).
 231  * This is a wrapper function that is compatible with both versions.
 232  * The program will error out if dirname(3) failed, this can only happen
 233  * with the OpenBSD version. */
 234 char *
 235 xdirname(const char *path)
 236 {
 237         char *p, *b;
 238
 239         if (!(p = strdup(path)))
 240                 err(1, "strdup");
 241         if (!(b = dirname(p)))
 242                 err(1, "dirname");
 243         if (!(b = strdup(b)))
 244                 err(1, "strdup");
 245         free(p);
 246
 247         return b;
 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         int offset, sign = '+';
 290         char out[32];
 291
 292         offset = intime->offset * 60;
 293         t = (time_t)intime->time + offset;
 294         if (!(intm = gmtime(&t)))
 295                 return;
 296         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 297         if (offset < 0) {
 298                 offset = -offset;
 299                 sign = '-';
 300         }
 301         fprintf(fp, "%s %c%02d%02d", out, sign, offset / 60, 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 int
 319 writeheader(FILE *fp, const char *title)
 320 {
 321         fputs("<!DOCTYPE html>\n"
 322                 "<html dir=\"ltr\" lang=\"en\">\n<head>\n"
 323                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 324                 "<meta http-equiv=\"Content-Language\" content=\"en\" />\n<title>", fp);
 325         xmlencode(fp, title, strlen(title));
 326         if (title[0] && stripped_name[0])
 327                 fputs(" - ", fp);
 328         xmlencode(fp, stripped_name, strlen(stripped_name));
 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, stripped_name, strlen(stripped_name));
 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         return 0;
 364 }
 365
 366 int
 367 writefooter(FILE *fp)
 368 {
 369         return !fputs("</div>\n</body>\n</html>\n", fp);
 370 }
 371
 372 int
 373 writeblobhtml(FILE *fp, const git_blob *blob)
 374 {
 375         off_t i;
 376         size_t n = 0;
 377         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 378         const char *s = git_blob_rawcontent(blob);
 379         git_off_t len = git_blob_rawsize(blob);
 380
 381         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 382
 383         if (len) {
 384                 n++;
 385                 fprintf(fp, nfmt, n, n, n);
 386                 for (i = 0; i < len - 1; i++) {
 387                         if (s[i] == '\n') {
 388                                 n++;
 389                                 fprintf(fp, nfmt, n, n, n);
 390                         }
 391                 }
 392         }
 393
 394         fputs("</pre></td><td><pre>\n", fp);
 395         xmlencode(fp, s, (size_t)len);
 396         fputs("</pre></td></tr></table>\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                 fprintf(fp, "(diff is too large, output suppressed)");
 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                 fputs("<tr><td>", fp);
 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, "</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>%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 href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 494                         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 int
 532 writelog(FILE *fp, const git_oid *oid)
 533 {
 534         struct commitinfo *ci;
 535         git_revwalk *w = NULL;
 536         git_oid id;
 537         size_t len;
 538         char path[PATH_MAX];
 539         FILE *fpfile;
 540         int r;
 541
 542         git_revwalk_new(&w, repo);
 543         git_revwalk_push(w, oid);
 544         git_revwalk_sorting(w, GIT_SORT_TIME);
 545         git_revwalk_simplify_first_parent(w);
 546
 547         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
 548                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
 549                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
 550
 551         while (!git_revwalk_next(&id, w)) {
 552                 relpath = "";
 553
 554                 if (!(ci = commitinfo_getbyoid(&id)))
 555                         break;
 556
 557                 fputs("<tr><td>", fp);
 558                 if (ci->author)
 559                         printtimeshort(fp, &(ci->author->when));
 560                 fputs("</td><td>", fp);
 561                 if (ci->summary) {
 562                         fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 563                         if ((len = strlen(ci->summary)) > summarylen) {
 564                                 xmlencode(fp, ci->summary, summarylen - 1);
 565                                 fputs("…", fp);
 566                         } else {
 567                                 xmlencode(fp, ci->summary, len);
 568                         }
 569                         fputs("</a>", fp);
 570                 }
 571                 fputs("</td><td>", fp);
 572                 if (ci->author)
 573                         xmlencode(fp, ci->author->name, strlen(ci->author->name));
 574                 fputs("</td><td class=\"num\">", fp);
 575                 fprintf(fp, "%zu", ci->filecount);
 576                 fputs("</td><td class=\"num\">", fp);
 577                 fprintf(fp, "+%zu", ci->addcount);
 578                 fputs("</td><td class=\"num\">", fp);
 579                 fprintf(fp, "-%zu", ci->delcount);
 580                 fputs("</td></tr>\n", fp);
 581
 582                 relpath = "../";
 583
 584                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 585                 if (r == -1 || (size_t)r >= sizeof(path))
 586                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 587
 588                 /* check if file exists if so skip it */
 589                 if (access(path, F_OK)) {
 590                         fpfile = efopen(path, "w");
 591                         writeheader(fpfile, ci->summary);
 592                         fputs("<pre>", fpfile);
 593                         printshowfile(fpfile, ci);
 594                         fputs("</pre>\n", fpfile);
 595                         writefooter(fpfile);
 596                         fclose(fpfile);
 597                 }
 598                 commitinfo_free(ci);
 599         }
 600         fputs("</tbody></table>", fp);
 601
 602         git_revwalk_free(w);
 603
 604         relpath = "";
 605
 606         return 0;
 607 }
 608
 609 void
 610 printcommitatom(FILE *fp, struct commitinfo *ci)
 611 {
 612         fputs("<entry>\n", fp);
 613
 614         fprintf(fp, "<id>%s</id>\n", ci->oid);
 615         if (ci->author) {
 616                 fputs("<updated>", fp);
 617                 printtimez(fp, &(ci->author->when));
 618                 fputs("</updated>\n", fp);
 619         }
 620         if (ci->summary) {
 621                 fputs("<title type=\"text\">", fp);
 622                 xmlencode(fp, ci->summary, strlen(ci->summary));
 623                 fputs("</title>\n", fp);
 624         }
 625         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 626                 ci->oid);
 627
 628         if (ci->author) {
 629                 fputs("<author><name>", fp);
 630                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 631                 fputs("</name>\n<email>", fp);
 632                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 633                 fputs("</email>\n</author>\n", fp);
 634         }
 635
 636         fputs("<content type=\"text\">", fp);
 637         fprintf(fp, "commit %s\n", ci->oid);
 638         if (ci->parentoid[0])
 639                 fprintf(fp, "parent %s\n", ci->parentoid);
 640         if (ci->author) {
 641                 fputs("Author: ", fp);
 642                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 643                 fputs(" &lt;", fp);
 644                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 645                 fputs("&gt;\nDate:   ", fp);
 646                 printtime(fp, &(ci->author->when));
 647                 fputc('\n', fp);
 648         }
 649         if (ci->msg) {
 650                 fputc('\n', fp);
 651                 xmlencode(fp, ci->msg, strlen(ci->msg));
 652         }
 653         fputs("\n</content>\n", fp);
 654
 655         fputs("</entry>\n", fp);
 656 }
 657
 658 int
 659 writeatom(FILE *fp)
 660 {
 661         struct commitinfo *ci;
 662         git_revwalk *w = NULL;
 663         git_oid id;
 664         size_t i, m = 100; /* last 'm' commits */
 665
 666         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 667               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 668         xmlencode(fp, stripped_name, strlen(stripped_name));
 669         fputs(", branch HEAD</title>\n<subtitle>", fp);
 670         xmlencode(fp, description, strlen(description));
 671         fputs("</subtitle>\n", fp);
 672
 673         git_revwalk_new(&w, repo);
 674         git_revwalk_push_head(w);
 675         git_revwalk_sorting(w, GIT_SORT_TIME);
 676         git_revwalk_simplify_first_parent(w);
 677
 678         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 679                 if (!(ci = commitinfo_getbyoid(&id)))
 680                         break;
 681                 printcommitatom(fp, ci);
 682                 commitinfo_free(ci);
 683         }
 684         git_revwalk_free(w);
 685
 686         fputs("</feed>", fp);
 687
 688         return 0;
 689 }
 690
 691 int
 692 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 693 {
 694         char tmp[PATH_MAX] = "", *d;
 695         const char *p;
 696         int lc = 0;
 697         FILE *fp;
 698
 699         d = xdirname(fpath);
 700         if (mkdirp(d)) {
 701                 free(d);
 702                 return -1;
 703         }
 704         free(d);
 705
 706         p = fpath;
 707         while (*p) {
 708                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 709                         errx(1, "path truncated: '../%s'", tmp);
 710                 p++;
 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 *branch, 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                 r = snprintf(entrypath, sizeof(entrypath), "%s%s%s",
 796                          path, path[0] ? "/" : "", entryname);
 797                 if (r == -1 || (size_t)r >= sizeof(entrypath))
 798                         errx(1, "path truncated: '%s%s%s'",
 799                                 path, path[0] ? "/" : "", entryname);
 800
 801                 r = snprintf(filepath, sizeof(filepath), "file/%s%s%s.html",
 802                          path, path[0] ? "/" : "", entryname);
 803                 if (r == -1 || (size_t)r >= sizeof(filepath))
 804                         errx(1, "path truncated: 'file/%s%s%s.html'",
 805                                 path, path[0] ? "/" : "", entryname);
 806
 807                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 808                         switch (git_object_type(obj)) {
 809                         case GIT_OBJ_BLOB:
 810                                 break;
 811                         case GIT_OBJ_TREE:
 812                                 /* NOTE: recurses */
 813                                 ret = writefilestree(fp, (git_tree *)obj, branch,
 814                                                      entrypath);
 815                                 git_object_free(obj);
 816                                 if (ret)
 817                                         return ret;
 818                                 continue;
 819                         default:
 820                                 git_object_free(obj);
 821                                 continue;
 822                         }
 823
 824                         filesize = git_blob_rawsize((git_blob *)obj);
 825                         lc = writeblob(obj, filepath, entryname, filesize);
 826
 827                         fputs("<tr><td>", fp);
 828                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 829                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 830                         xmlencode(fp, entrypath, strlen(entrypath));
 831                         fputs("</a></td><td class=\"num\">", fp);
 832                         if (showlinecount && lc > 0)
 833                                 fprintf(fp, "%dL", lc);
 834                         else
 835                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 836                         fputs("</td></tr>\n", fp);
 837                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 838                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 839                                 relpath);
 840                         xmlencode(fp, entrypath, strlen(entrypath));
 841                         git_submodule_free(module);
 842                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 843                 }
 844         }
 845
 846         return 0;
 847 }
 848
 849 int
 850 writefiles(FILE *fp, const git_oid *id, const char *branch)
 851 {
 852         git_tree *tree = NULL;
 853         git_commit *commit = NULL;
 854         int ret = -1;
 855
 856         fputs("<table id=\"files\"><thead>\n<tr>"
 857               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 858               "</tr>\n</thead><tbody>\n", fp);
 859
 860         if (git_commit_lookup(&commit, repo, id) ||
 861             git_commit_tree(&tree, commit))
 862                 goto err;
 863         ret = writefilestree(fp, tree, branch, "");
 864
 865 err:
 866         fputs("</tbody></table>", fp);
 867
 868         git_commit_free(commit);
 869         git_tree_free(tree);
 870
 871         return ret;
 872 }
 873
 874 int
 875 refs_cmp(const void *v1, const void *v2)
 876 {
 877         git_reference *r1 = (*(git_reference **)v1);
 878         git_reference *r2 = (*(git_reference **)v2);
 879         int t1, t2;
 880
 881         t1 = git_reference_is_branch(r1);
 882         t2 = git_reference_is_branch(r2);
 883
 884         if (t1 != t2)
 885                 return t1 - t2;
 886
 887         return strcmp(git_reference_shorthand(r1),
 888                       git_reference_shorthand(r2));
 889 }
 890
 891 int
 892 writerefs(FILE *fp)
 893 {
 894         struct commitinfo *ci;
 895         const git_oid *id = NULL;
 896         git_object *obj = NULL;
 897         git_reference *dref = NULL, *r, *ref = NULL;
 898         git_reference_iterator *it = NULL;
 899         git_reference **refs = NULL;
 900         size_t count, i, j, refcount;
 901         const char *titles[] = { "Branches", "Tags" };
 902         const char *ids[] = { "branches", "tags" };
 903         const char *name;
 904
 905         if (git_reference_iterator_new(&it, repo))
 906                 return -1;
 907
 908         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 909                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 910                         err(1, "realloc");
 911                 refs[refcount] = ref;
 912         }
 913         git_reference_iterator_free(it);
 914
 915         /* sort by type then shorthand name */
 916         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 917
 918         for (j = 0; j < 2; j++) {
 919                 for (i = 0, count = 0; i < refcount; i++) {
 920                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 921                             !(git_reference_is_tag(refs[i]) && j == 1))
 922                                 continue;
 923
 924                         switch (git_reference_type(refs[i])) {
 925                         case GIT_REF_SYMBOLIC:
 926                                 if (git_reference_resolve(&dref, refs[i]))
 927                                         goto err;
 928                                 r = dref;
 929                                 break;
 930                         case GIT_REF_OID:
 931                                 r = refs[i];
 932                                 break;
 933                         default:
 934                                 continue;
 935                         }
 936                         if (!(id = git_reference_target(r)))
 937                                 goto err;
 938                         if (git_reference_peel(&obj, r, GIT_OBJ_ANY))
 939                                 goto err;
 940                         if (!(id = git_object_id(obj)))
 941                                 goto err;
 942                         if (!(ci = commitinfo_getbyoid(id)))
 943                                 break;
 944
 945                         /* print header if it has an entry (first). */
 946                         if (++count == 1) {
 947                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 948                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 949                                       titles[j], ids[j]);
 950                         }
 951
 952                         relpath = "";
 953                         name = git_reference_shorthand(r);
 954
 955                         fputs("<tr><td>", fp);
 956                         xmlencode(fp, name, strlen(name));
 957                         fputs("</td><td>", fp);
 958                         if (ci->author)
 959                                 printtimeshort(fp, &(ci->author->when));
 960                         fputs("</td><td>", fp);
 961                         if (ci->author)
 962                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 963                         fputs("</td></tr>\n", fp);
 964
 965                         relpath = "../";
 966
 967                         commitinfo_free(ci);
 968                         git_object_free(obj);
 969                         obj = NULL;
 970                         git_reference_free(dref);
 971                         dref = NULL;
 972                 }
 973                 /* table footer */
 974                 if (count)
 975                         fputs("</tbody></table><br/>", fp);
 976         }
 977
 978 err:
 979         git_object_free(obj);
 980         git_reference_free(dref);
 981
 982         for (i = 0; i < refcount; i++)
 983                 git_reference_free(refs[i]);
 984         free(refs);
 985
 986         return 0;
 987 }
 988
 989 void
 990 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
 991 {
 992         int r;
 993
 994         r = snprintf(buf, bufsiz, "%s%s%s",
 995                 repodir, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
 996         if (r == -1 || (size_t)r >= bufsiz)
 997                 errx(1, "path truncated: '%s%s%s'",
 998                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
 999 }
1000
1001 int
1002 main(int argc, char *argv[])
1003 {
1004         git_object *obj = NULL;
1005         const git_oid *head = NULL;
1006         const git_error *e = NULL;
1007         FILE *fp, *fpread;
1008         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1009         int status;
1010
1011         if (argc != 2) {
1012                 fprintf(stderr, "%s <repodir>\n", argv[0]);
1013                 return 1;
1014         }
1015         repodir = argv[1];
1016
1017         if (!realpath(repodir, repodirabs))
1018                 err(1, "realpath");
1019
1020         git_libgit2_init();
1021
1022         if ((status = git_repository_open_ext(&repo, repodir,
1023                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL)) < 0) {
1024                 e = giterr_last();
1025                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1026                 return status;
1027         }
1028
1029         /* find HEAD */
1030         if (git_revparse_single(&obj, repo, "HEAD"))
1031                 return 1;
1032         head = git_object_id(obj);
1033         git_object_free(obj);
1034
1035         /* use directory name as name */
1036         if ((name = strrchr(repodirabs, '/')))
1037                 name++;
1038         else
1039                 name = "";
1040
1041         /* strip .git suffix */
1042         if (!(stripped_name = strdup(name)))
1043                 err(1, "strdup");
1044         if ((p = strrchr(stripped_name, '.')))
1045                 if (!strcmp(p, ".git"))
1046                         *p = '\0';
1047
1048         /* read description or .git/description */
1049         joinpath(path, sizeof(path), repodir, "description");
1050         if (!(fpread = fopen(path, "r"))) {
1051                 joinpath(path, sizeof(path), repodir, ".git/description");
1052                 fpread = fopen(path, "r");
1053         }
1054         if (fpread) {
1055                 if (!fgets(description, sizeof(description), fpread))
1056                         description[0] = '\0';
1057                 fclose(fpread);
1058         }
1059
1060         /* read url or .git/url */
1061         joinpath(path, sizeof(path), repodir, "url");
1062         if (!(fpread = fopen(path, "r"))) {
1063                 joinpath(path, sizeof(path), repodir, ".git/url");
1064                 fpread = fopen(path, "r");
1065         }
1066         if (fpread) {
1067                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1068                         cloneurl[0] = '\0';
1069                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1070                 fclose(fpread);
1071         }
1072
1073         /* check LICENSE */
1074         haslicense = !git_revparse_single(&obj, repo, "HEAD:LICENSE");
1075         git_object_free(obj);
1076         /* check README */
1077         hasreadme = !git_revparse_single(&obj, repo, "HEAD:README");
1078         git_object_free(obj);
1079         hassubmodules = !git_revparse_single(&obj, repo, "HEAD:.gitmodules");
1080         git_object_free(obj);
1081
1082         /* log for HEAD */
1083         fp = efopen("log.html", "w");
1084         relpath = "";
1085         writeheader(fp, "Log");
1086         mkdir("commit", 0755);
1087         writelog(fp, head);
1088         writefooter(fp);
1089         fclose(fp);
1090
1091         /* files for HEAD */
1092         fp = efopen("files.html", "w");
1093         writeheader(fp, "Files");
1094         writefiles(fp, head, "HEAD");
1095         writefooter(fp);
1096         fclose(fp);
1097
1098         /* summary page with branches and tags */
1099         fp = efopen("refs.html", "w");
1100         writeheader(fp, "Refs");
1101         writerefs(fp);
1102         writefooter(fp);
1103         fclose(fp);
1104
1105         /* Atom feed */
1106         fp = efopen("atom.xml", "w");
1107         writeatom(fp);
1108         fclose(fp);
1109
1110         /* cleanup */
1111         git_repository_free(repo);
1112         git_libgit2_shutdown();
1113
1114         return 0;
1115 }