stagit.c

   1 #include <sys/stat.h>
   2
   3 #include <err.h>
   4 #include <errno.h>
   5 #include <inttypes.h>
   6 #include <libgen.h>
   7 #include <limits.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12
  13 #include <git2.h>
  14
  15 #include "compat.h"
  16
  17 struct deltainfo {
  18         git_patch *patch;
  19
  20         size_t addcount;
  21         size_t delcount;
  22 };
  23
  24 struct commitinfo {
  25         const git_oid *id;
  26
  27         char oid[GIT_OID_HEXSZ + 1];
  28         char parentoid[GIT_OID_HEXSZ + 1];
  29
  30         const git_signature *author;
  31         const git_signature *committer;
  32         const char          *summary;
  33         const char          *msg;
  34
  35         git_diff   *diff;
  36         git_commit *commit;
  37         git_commit *parent;
  38         git_tree   *commit_tree;
  39         git_tree   *parent_tree;
  40
  41         size_t addcount;
  42         size_t delcount;
  43         size_t filecount;
  44
  45         struct deltainfo **deltas;
  46         size_t ndeltas;
  47 };
  48
  49 /* summary length (bytes) in the log */
  50 static const unsigned summarylen = 70;
  51 /* display line count or file size in file tree index */
  52 static const int showlinecount = 1;
  53
  54 static git_repository *repo;
  55
  56 static const char *relpath = "";
  57 static const char *repodir;
  58
  59 static char *name = "";
  60 static char *strippedname = "";
  61 static char description[255];
  62 static char cloneurl[1024];
  63 static int haslicense, hasreadme, hassubmodules;
  64
  65 /* cache */
  66 static git_oid lastoid;
  67 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  68 static FILE *rcachefp, *wcachefp;
  69 static const char *cachefile;
  70
  71 #ifndef USE_PLEDGE
  72 #define pledge(p1,p2) 0
  73 #endif
  74
  75 void
  76 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  77 {
  78         int r;
  79
  80         r = snprintf(buf, bufsiz, "%s%s%s",
  81                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  82         if (r == -1 || (size_t)r >= bufsiz)
  83                 errx(1, "path truncated: '%s%s%s'",
  84                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  85 }
  86
  87 void
  88 deltainfo_free(struct deltainfo *di)
  89 {
  90         if (!di)
  91                 return;
  92         git_patch_free(di->patch);
  93         di->patch = NULL;
  94         free(di);
  95 }
  96
  97 int
  98 commitinfo_getstats(struct commitinfo *ci)
  99 {
 100         struct deltainfo *di;
 101         const git_diff_delta *delta;
 102         const git_diff_hunk *hunk;
 103         const git_diff_line *line;
 104         git_patch *patch = NULL;
 105         size_t ndeltas, nhunks, nhunklines;
 106         size_t i, j, k;
 107
 108         ndeltas = git_diff_num_deltas(ci->diff);
 109         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 110                 err(1, "calloc");
 111
 112         for (i = 0; i < ndeltas; i++) {
 113                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 114                         err(1, "calloc");
 115                 if (git_patch_from_diff(&patch, ci->diff, i)) {
 116                         git_patch_free(patch);
 117                         goto err;
 118                 }
 119                 di->patch = patch;
 120                 ci->deltas[i] = di;
 121
 122                 delta = git_patch_get_delta(patch);
 123
 124                 /* skip stats for binary data */
 125                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 126                         continue;
 127
 128                 nhunks = git_patch_num_hunks(patch);
 129                 for (j = 0; j < nhunks; j++) {
 130                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 131                                 break;
 132                         for (k = 0; ; k++) {
 133                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 134                                         break;
 135                                 if (line->old_lineno == -1) {
 136                                         di->addcount++;
 137                                         ci->addcount++;
 138                                 } else if (line->new_lineno == -1) {
 139                                         di->delcount++;
 140                                         ci->delcount++;
 141                                 }
 142                         }
 143                 }
 144         }
 145         ci->ndeltas = i;
 146         ci->filecount = i;
 147
 148         return 0;
 149
 150 err:
 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         ci->ndeltas = 0;
 157         ci->addcount = 0;
 158         ci->delcount = 0;
 159         ci->filecount = 0;
 160
 161         return -1;
 162 }
 163
 164 void
 165 commitinfo_free(struct commitinfo *ci)
 166 {
 167         size_t i;
 168
 169         if (!ci)
 170                 return;
 171         if (ci->deltas)
 172                 for (i = 0; i < ci->ndeltas; i++)
 173                         deltainfo_free(ci->deltas[i]);
 174         free(ci->deltas);
 175         ci->deltas = NULL;
 176         git_diff_free(ci->diff);
 177         git_tree_free(ci->commit_tree);
 178         git_tree_free(ci->parent_tree);
 179         git_commit_free(ci->commit);
 180 }
 181
 182 struct commitinfo *
 183 commitinfo_getbyoid(const git_oid *id)
 184 {
 185         struct commitinfo *ci;
 186         git_diff_options opts;
 187
 188         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 189                 err(1, "calloc");
 190
 191         if (git_commit_lookup(&(ci->commit), repo, id))
 192                 goto err;
 193         ci->id = id;
 194
 195         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 196         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 197
 198         ci->author = git_commit_author(ci->commit);
 199         ci->committer = git_commit_committer(ci->commit);
 200         ci->summary = git_commit_summary(ci->commit);
 201         ci->msg = git_commit_message(ci->commit);
 202
 203         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 204                 goto err;
 205         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 206                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 207                         ci->parent = NULL;
 208                         ci->parent_tree = NULL;
 209                 }
 210         }
 211
 212         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 213         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 214         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 215                 goto err;
 216         if (commitinfo_getstats(ci) == -1)
 217                 goto err;
 218
 219         return ci;
 220
 221 err:
 222         commitinfo_free(ci);
 223         free(ci);
 224
 225         return NULL;
 226 }
 227
 228 FILE *
 229 efopen(const char *name, const char *flags)
 230 {
 231         FILE *fp;
 232
 233         if (!(fp = fopen(name, flags)))
 234                 err(1, "fopen");
 235
 236         return fp;
 237 }
 238
 239 /* Escape characters below as HTML 2.0 / XML 1.0. */
 240 void
 241 xmlencode(FILE *fp, const char *s, size_t len)
 242 {
 243         size_t i;
 244
 245         for (i = 0; *s && i < len; s++, i++) {
 246                 switch(*s) {
 247                 case '<':  fputs("&lt;",   fp); break;
 248                 case '>':  fputs("&gt;",   fp); break;
 249                 case '\'': fputs("&apos;", fp); break;
 250                 case '&':  fputs("&amp;",  fp); break;
 251                 case '"':  fputs("&quot;", fp); break;
 252                 default:   fputc(*s, fp);
 253                 }
 254         }
 255 }
 256
 257 int
 258 mkdirp(const char *path)
 259 {
 260         char tmp[PATH_MAX], *p;
 261
 262         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 263                 errx(1, "path truncated: '%s'", path);
 264         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 265                 if (*p != '/')
 266                         continue;
 267                 *p = '\0';
 268                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 269                         return -1;
 270                 *p = '/';
 271         }
 272         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 273                 return -1;
 274         return 0;
 275 }
 276
 277 void
 278 printtimez(FILE *fp, const git_time *intime)
 279 {
 280         struct tm *intm;
 281         time_t t;
 282         char out[32];
 283
 284         t = (time_t)intime->time;
 285         if (!(intm = gmtime(&t)))
 286                 return;
 287         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 288         fputs(out, fp);
 289 }
 290
 291 void
 292 printtime(FILE *fp, const git_time *intime)
 293 {
 294         struct tm *intm;
 295         time_t t;
 296         char out[32];
 297
 298         t = (time_t)intime->time + (intime->offset * 60);
 299         if (!(intm = gmtime(&t)))
 300                 return;
 301         strftime(out, sizeof(out), "%a %b %e %H:%M:%S", intm);
 302         if (intime->offset < 0)
 303                 fprintf(fp, "%s -%02d%02d", out,
 304                             -(intime->offset) / 60, -(intime->offset) % 60);
 305         else
 306                 fprintf(fp, "%s +%02d%02d", out,
 307                             intime->offset / 60, intime->offset % 60);
 308 }
 309
 310 void
 311 printtimeshort(FILE *fp, const git_time *intime)
 312 {
 313         struct tm *intm;
 314         time_t t;
 315         char out[32];
 316
 317         t = (time_t)intime->time;
 318         if (!(intm = gmtime(&t)))
 319                 return;
 320         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 321         fputs(out, fp);
 322 }
 323
 324 void
 325 writeheader(FILE *fp, const char *title)
 326 {
 327         fputs("<!DOCTYPE html>\n"
 328                 "<html>\n<head>\n"
 329                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 330                 "<title>", fp);
 331         xmlencode(fp, title, strlen(title));
 332         if (title[0] && strippedname[0])
 333                 fputs(" - ", fp);
 334         xmlencode(fp, strippedname, strlen(strippedname));
 335         if (description[0])
 336                 fputs(" - ", fp);
 337         xmlencode(fp, description, strlen(description));
 338         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 339         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 340                 name, relpath);
 341         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 342         fputs("</head>\n<body>\n<table><tr><td>", fp);
 343         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 344                 relpath, relpath);
 345         fputs("</td><td><h1>", fp);
 346         xmlencode(fp, strippedname, strlen(strippedname));
 347         fputs("</h1><span class=\"desc\">", fp);
 348         xmlencode(fp, description, strlen(description));
 349         fputs("</span></td></tr>", fp);
 350         if (cloneurl[0]) {
 351                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 352                 xmlencode(fp, cloneurl, strlen(cloneurl));
 353                 fputs("\">", fp);
 354                 xmlencode(fp, cloneurl, strlen(cloneurl));
 355                 fputs("</a></td></tr>", fp);
 356         }
 357         fputs("<tr><td></td><td>\n", fp);
 358         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 359         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 360         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 361         if (hassubmodules)
 362                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 363         if (hasreadme)
 364                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 365         if (haslicense)
 366                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 367         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 368 }
 369
 370 void
 371 writefooter(FILE *fp)
 372 {
 373         fputs("</div>\n</body>\n</html>\n", fp);
 374 }
 375
 376 int
 377 writeblobhtml(FILE *fp, const git_blob *blob)
 378 {
 379         off_t i;
 380         size_t n = 0;
 381         char *nfmt = "<a href=\"#l%d\" id=\"l%d\">%d</a>\n";
 382         const char *s = git_blob_rawcontent(blob);
 383         git_off_t len = git_blob_rawsize(blob);
 384
 385         fputs("<table id=\"blob\"><tr><td class=\"num\"><pre>\n", fp);
 386
 387         if (len) {
 388                 n++;
 389                 fprintf(fp, nfmt, n, n, n);
 390                 for (i = 0; i < len - 1; i++) {
 391                         if (s[i] == '\n') {
 392                                 n++;
 393                                 fprintf(fp, nfmt, n, n, n);
 394                         }
 395                 }
 396         }
 397
 398         fputs("</pre></td><td><pre>\n", fp);
 399         xmlencode(fp, s, (size_t)len);
 400         fputs("</pre></td></tr></table>\n", fp);
 401
 402         return n;
 403 }
 404
 405 void
 406 printcommit(FILE *fp, struct commitinfo *ci)
 407 {
 408         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 409                 relpath, ci->oid, ci->oid);
 410
 411         if (ci->parentoid[0])
 412                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 413                         relpath, ci->parentoid, ci->parentoid);
 414
 415         if (ci->author) {
 416                 fputs("<b>Author:</b> ", fp);
 417                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 418                 fputs(" &lt;<a href=\"mailto:", fp);
 419                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 420                 fputs("\">", fp);
 421                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 422                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 423                 printtime(fp, &(ci->author->when));
 424                 fputc('\n', fp);
 425         }
 426         if (ci->msg) {
 427                 fputc('\n', fp);
 428                 xmlencode(fp, ci->msg, strlen(ci->msg));
 429                 fputc('\n', fp);
 430         }
 431 }
 432
 433 void
 434 printshowfile(FILE *fp, struct commitinfo *ci)
 435 {
 436         const git_diff_delta *delta;
 437         const git_diff_hunk *hunk;
 438         const git_diff_line *line;
 439         git_patch *patch;
 440         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 441         char linestr[80];
 442
 443         printcommit(fp, ci);
 444
 445         if (!ci->deltas)
 446                 return;
 447
 448         if (ci->filecount > 1000   ||
 449             ci->ndeltas   > 1000   ||
 450             ci->addcount  > 100000 ||
 451             ci->delcount  > 100000) {
 452                 fputs("Diff is too large, output suppressed.\n", fp);
 453                 return;
 454         }
 455
 456         /* diff stat */
 457         fputs("<b>Diffstat:</b>\n<table>", fp);
 458         for (i = 0; i < ci->ndeltas; i++) {
 459                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 460                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 461                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 462                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 463                         fputs(" -&gt; ", fp);
 464                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 465                 }
 466
 467                 add = ci->deltas[i]->addcount;
 468                 del = ci->deltas[i]->delcount;
 469                 changed = add + del;
 470                 total = sizeof(linestr) - 2;
 471                 if (changed > total) {
 472                         if (add)
 473                                 add = ((float)total / changed * add) + 1;
 474                         if (del)
 475                                 del = ((float)total / changed * del) + 1;
 476                 }
 477                 memset(&linestr, '+', add);
 478                 memset(&linestr[add], '-', del);
 479
 480                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 481                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 482                 fwrite(&linestr, 1, add, fp);
 483                 fputs("</span><span class=\"d\">", fp);
 484                 fwrite(&linestr[add], 1, del, fp);
 485                 fputs("</span></td></tr>\n", fp);
 486         }
 487         fprintf(fp, "</table>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 488                 ci->filecount, ci->filecount == 1 ? "" : "s",
 489                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 490                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 491
 492         fputs("<hr/>", fp);
 493
 494         for (i = 0; i < ci->ndeltas; i++) {
 495                 patch = ci->deltas[i]->patch;
 496                 delta = git_patch_get_delta(patch);
 497                 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",
 498                         i, relpath, delta->old_file.path, delta->old_file.path,
 499                         relpath, delta->new_file.path, delta->new_file.path);
 500
 501                 /* check binary data */
 502                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 503                         fputs("Binary files differ.\n", fp);
 504                         continue;
 505                 }
 506
 507                 nhunks = git_patch_num_hunks(patch);
 508                 for (j = 0; j < nhunks; j++) {
 509                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 510                                 break;
 511
 512                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 513                         xmlencode(fp, hunk->header, hunk->header_len);
 514                         fputs("</a>", fp);
 515
 516                         for (k = 0; ; k++) {
 517                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 518                                         break;
 519                                 if (line->old_lineno == -1)
 520                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 521                                                 i, j, k, i, j, k);
 522                                 else if (line->new_lineno == -1)
 523                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 524                                                 i, j, k, i, j, k);
 525                                 else
 526                                         fputc(' ', fp);
 527                                 xmlencode(fp, line->content, line->content_len);
 528                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 529                                         fputs("</a>", fp);
 530                         }
 531                 }
 532         }
 533 }
 534
 535 void
 536 writelogline(FILE *fp, struct commitinfo *ci)
 537 {
 538         size_t len;
 539
 540         fputs("<tr><td>", fp);
 541         if (ci->author)
 542                 printtimeshort(fp, &(ci->author->when));
 543         fputs("</td><td>", fp);
 544         if (ci->summary) {
 545                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 546                 if ((len = strlen(ci->summary)) > summarylen) {
 547                         xmlencode(fp, ci->summary, summarylen - 1);
 548                         fputs("…", fp);
 549                 } else {
 550                         xmlencode(fp, ci->summary, len);
 551                 }
 552                 fputs("</a>", fp);
 553         }
 554         fputs("</td><td>", fp);
 555         if (ci->author)
 556                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 557         fputs("</td><td class=\"num\">", fp);
 558         fprintf(fp, "%zu", ci->filecount);
 559         fputs("</td><td class=\"num\">", fp);
 560         fprintf(fp, "+%zu", ci->addcount);
 561         fputs("</td><td class=\"num\">", fp);
 562         fprintf(fp, "-%zu", ci->delcount);
 563         fputs("</td></tr>\n", fp);
 564 }
 565
 566 int
 567 writelog(FILE *fp, const git_oid *oid)
 568 {
 569         struct commitinfo *ci;
 570         git_revwalk *w = NULL;
 571         git_oid id;
 572         char path[PATH_MAX];
 573         FILE *fpfile;
 574         int r;
 575
 576         git_revwalk_new(&w, repo);
 577         git_revwalk_push(w, oid);
 578         git_revwalk_sorting(w, GIT_SORT_TIME);
 579         git_revwalk_simplify_first_parent(w);
 580
 581         while (!git_revwalk_next(&id, w)) {
 582                 relpath = "";
 583
 584                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 585                         break;
 586                 if (!(ci = commitinfo_getbyoid(&id)))
 587                         break;
 588
 589                 writelogline(fp, ci);
 590                 if (cachefile)
 591                         writelogline(wcachefp, ci);
 592
 593                 relpath = "../";
 594
 595                 r = snprintf(path, sizeof(path), "commit/%s.html", ci->oid);
 596                 if (r == -1 || (size_t)r >= sizeof(path))
 597                         errx(1, "path truncated: 'commit/%s.html'", ci->oid);
 598
 599                 /* check if file exists if so skip it */
 600                 if (access(path, F_OK)) {
 601                         fpfile = efopen(path, "w");
 602                         writeheader(fpfile, ci->summary);
 603                         fputs("<pre>", fpfile);
 604                         printshowfile(fpfile, ci);
 605                         fputs("</pre>\n", fpfile);
 606                         writefooter(fpfile);
 607                         fclose(fpfile);
 608                 }
 609                 commitinfo_free(ci);
 610         }
 611         git_revwalk_free(w);
 612
 613         relpath = "";
 614
 615         return 0;
 616 }
 617
 618 void
 619 printcommitatom(FILE *fp, struct commitinfo *ci)
 620 {
 621         fputs("<entry>\n", fp);
 622
 623         fprintf(fp, "<id>%s</id>\n", ci->oid);
 624         if (ci->author) {
 625                 fputs("<published>", fp);
 626                 printtimez(fp, &(ci->author->when));
 627                 fputs("</published>\n", fp);
 628         }
 629         if (ci->committer) {
 630                 fputs("<updated>", fp);
 631                 printtimez(fp, &(ci->committer->when));
 632                 fputs("</updated>\n", fp);
 633         }
 634         if (ci->summary) {
 635                 fputs("<title type=\"text\">", fp);
 636                 xmlencode(fp, ci->summary, strlen(ci->summary));
 637                 fputs("</title>\n", fp);
 638         }
 639         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 640                 ci->oid);
 641
 642         if (ci->author) {
 643                 fputs("<author><name>", fp);
 644                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 645                 fputs("</name>\n<email>", fp);
 646                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 647                 fputs("</email>\n</author>\n", fp);
 648         }
 649
 650         fputs("<content type=\"text\">", fp);
 651         fprintf(fp, "commit %s\n", ci->oid);
 652         if (ci->parentoid[0])
 653                 fprintf(fp, "parent %s\n", ci->parentoid);
 654         if (ci->author) {
 655                 fputs("Author: ", fp);
 656                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 657                 fputs(" &lt;", fp);
 658                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 659                 fputs("&gt;\nDate:   ", fp);
 660                 printtime(fp, &(ci->author->when));
 661                 fputc('\n', fp);
 662         }
 663         if (ci->msg) {
 664                 fputc('\n', fp);
 665                 xmlencode(fp, ci->msg, strlen(ci->msg));
 666         }
 667         fputs("\n</content>\n</entry>\n", fp);
 668 }
 669
 670 int
 671 writeatom(FILE *fp)
 672 {
 673         struct commitinfo *ci;
 674         git_revwalk *w = NULL;
 675         git_oid id;
 676         size_t i, m = 100; /* last 'm' commits */
 677
 678         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 679               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 680         xmlencode(fp, strippedname, strlen(strippedname));
 681         fputs(", branch HEAD</title>\n<subtitle>", fp);
 682         xmlencode(fp, description, strlen(description));
 683         fputs("</subtitle>\n", fp);
 684
 685         git_revwalk_new(&w, repo);
 686         git_revwalk_push_head(w);
 687         git_revwalk_sorting(w, GIT_SORT_TIME);
 688         git_revwalk_simplify_first_parent(w);
 689
 690         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 691                 if (!(ci = commitinfo_getbyoid(&id)))
 692                         break;
 693                 printcommitatom(fp, ci);
 694                 commitinfo_free(ci);
 695         }
 696         git_revwalk_free(w);
 697
 698         fputs("</feed>", fp);
 699
 700         return 0;
 701 }
 702
 703 int
 704 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 705 {
 706         char tmp[PATH_MAX] = "", *d;
 707         const char *p;
 708         int lc = 0;
 709         FILE *fp;
 710
 711         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 712                 errx(1, "path truncated: '%s'", fpath);
 713         if (!(d = dirname(tmp)))
 714                 err(1, "dirname");
 715         if (mkdirp(d))
 716                 return -1;
 717
 718         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 719                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 720                         errx(1, "path truncated: '../%s'", tmp);
 721         }
 722         relpath = tmp;
 723
 724         fp = efopen(fpath, "w");
 725         writeheader(fp, filename);
 726         fputs("<p> ", fp);
 727         xmlencode(fp, filename, strlen(filename));
 728         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 729         fputs("</p><hr/>", fp);
 730
 731         if (git_blob_is_binary((git_blob *)obj)) {
 732                 fputs("<p>Binary file.</p>\n", fp);
 733         } else {
 734                 lc = writeblobhtml(fp, (git_blob *)obj);
 735                 if (ferror(fp))
 736                         err(1, "fwrite");
 737         }
 738         writefooter(fp);
 739         fclose(fp);
 740
 741         relpath = "";
 742
 743         return lc;
 744 }
 745
 746 const char *
 747 filemode(git_filemode_t m)
 748 {
 749         static char mode[11];
 750
 751         memset(mode, '-', sizeof(mode) - 1);
 752         mode[10] = '\0';
 753
 754         if (S_ISREG(m))
 755                 mode[0] = '-';
 756         else if (S_ISBLK(m))
 757                 mode[0] = 'b';
 758         else if (S_ISCHR(m))
 759                 mode[0] = 'c';
 760         else if (S_ISDIR(m))
 761                 mode[0] = 'd';
 762         else if (S_ISFIFO(m))
 763                 mode[0] = 'p';
 764         else if (S_ISLNK(m))
 765                 mode[0] = 'l';
 766         else if (S_ISSOCK(m))
 767                 mode[0] = 's';
 768         else
 769                 mode[0] = '?';
 770
 771         if (m & S_IRUSR) mode[1] = 'r';
 772         if (m & S_IWUSR) mode[2] = 'w';
 773         if (m & S_IXUSR) mode[3] = 'x';
 774         if (m & S_IRGRP) mode[4] = 'r';
 775         if (m & S_IWGRP) mode[5] = 'w';
 776         if (m & S_IXGRP) mode[6] = 'x';
 777         if (m & S_IROTH) mode[7] = 'r';
 778         if (m & S_IWOTH) mode[8] = 'w';
 779         if (m & S_IXOTH) mode[9] = 'x';
 780
 781         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 782         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 783         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 784
 785         return mode;
 786 }
 787
 788 int
 789 writefilestree(FILE *fp, git_tree *tree, const char *path)
 790 {
 791         const git_tree_entry *entry = NULL;
 792         git_submodule *module = NULL;
 793         git_object *obj = NULL;
 794         git_off_t filesize;
 795         const char *entryname;
 796         char filepath[PATH_MAX], entrypath[PATH_MAX];
 797         size_t count, i;
 798         int lc, r, ret;
 799
 800         count = git_tree_entrycount(tree);
 801         for (i = 0; i < count; i++) {
 802                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 803                     !(entryname = git_tree_entry_name(entry)))
 804                         return -1;
 805                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 806
 807                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 808                          entrypath);
 809                 if (r == -1 || (size_t)r >= sizeof(filepath))
 810                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 811
 812                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 813                         switch (git_object_type(obj)) {
 814                         case GIT_OBJ_BLOB:
 815                                 break;
 816                         case GIT_OBJ_TREE:
 817                                 /* NOTE: recurses */
 818                                 ret = writefilestree(fp, (git_tree *)obj,
 819                                                      entrypath);
 820                                 git_object_free(obj);
 821                                 if (ret)
 822                                         return ret;
 823                                 continue;
 824                         default:
 825                                 git_object_free(obj);
 826                                 continue;
 827                         }
 828
 829                         filesize = git_blob_rawsize((git_blob *)obj);
 830                         lc = writeblob(obj, filepath, entryname, filesize);
 831
 832                         fputs("<tr><td>", fp);
 833                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 834                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 835                         xmlencode(fp, entrypath, strlen(entrypath));
 836                         fputs("</a></td><td class=\"num\">", fp);
 837                         if (showlinecount && lc > 0)
 838                                 fprintf(fp, "%dL", lc);
 839                         else
 840                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 841                         fputs("</td></tr>\n", fp);
 842                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 843                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 844                                 relpath);
 845                         xmlencode(fp, entrypath, strlen(entrypath));
 846                         git_submodule_free(module);
 847                         fputs("</a></td><td class=\"num\"></td></tr>\n", fp);
 848                 }
 849         }
 850
 851         return 0;
 852 }
 853
 854 int
 855 writefiles(FILE *fp, const git_oid *id)
 856 {
 857         git_tree *tree = NULL;
 858         git_commit *commit = NULL;
 859         int ret = -1;
 860
 861         fputs("<table id=\"files\"><thead>\n<tr>"
 862               "<td>Mode</td><td>Name</td><td class=\"num\">Size</td>"
 863               "</tr>\n</thead><tbody>\n", fp);
 864
 865         if (!git_commit_lookup(&commit, repo, id) &&
 866             !git_commit_tree(&tree, commit))
 867                 ret = writefilestree(fp, tree, "");
 868
 869         fputs("</tbody></table>", fp);
 870
 871         git_commit_free(commit);
 872         git_tree_free(tree);
 873
 874         return ret;
 875 }
 876
 877 int
 878 refs_cmp(const void *v1, const void *v2)
 879 {
 880         git_reference *r1 = (*(git_reference **)v1);
 881         git_reference *r2 = (*(git_reference **)v2);
 882         int r;
 883
 884         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 885                 return r;
 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 (!git_reference_target(r) ||
 937                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 938                                 goto err;
 939                         if (!(id = git_object_id(obj)))
 940                                 goto err;
 941                         if (!(ci = commitinfo_getbyoid(id)))
 942                                 break;
 943
 944                         /* print header if it has an entry (first). */
 945                         if (++count == 1) {
 946                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\"><thead>\n<tr><td>Name</td>"
 947                                       "<td>Last commit date</td><td>Author</td>\n</tr>\n</thead><tbody>\n",
 948                                       titles[j], ids[j]);
 949                         }
 950
 951                         relpath = "";
 952                         name = git_reference_shorthand(r);
 953
 954                         fputs("<tr><td>", fp);
 955                         xmlencode(fp, name, strlen(name));
 956                         fputs("</td><td>", fp);
 957                         if (ci->author)
 958                                 printtimeshort(fp, &(ci->author->when));
 959                         fputs("</td><td>", fp);
 960                         if (ci->author)
 961                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 962                         fputs("</td></tr>\n", fp);
 963
 964                         relpath = "../";
 965
 966                         commitinfo_free(ci);
 967                         git_object_free(obj);
 968                         obj = NULL;
 969                         git_reference_free(dref);
 970                         dref = NULL;
 971                 }
 972                 /* table footer */
 973                 if (count)
 974                         fputs("</tbody></table><br/>", fp);
 975         }
 976
 977 err:
 978         git_object_free(obj);
 979         git_reference_free(dref);
 980
 981         for (i = 0; i < refcount; i++)
 982                 git_reference_free(refs[i]);
 983         free(refs);
 984
 985         return 0;
 986 }
 987
 988 void
 989 usage(char *argv0)
 990 {
 991         fprintf(stderr, "%s [-c cachefile] repodir\n", argv0);
 992         exit(1);
 993 }
 994
 995 int
 996 main(int argc, char *argv[])
 997 {
 998         git_object *obj = NULL;
 999         const git_oid *head = NULL;
1000         const git_error *e = NULL;
1001         FILE *fp, *fpread;
1002         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1003         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1004         size_t n;
1005         int i, fd;
1006
1007         if (pledge("stdio rpath wpath cpath", NULL) == -1)
1008                 err(1, "pledge");
1009
1010         for (i = 1; i < argc; i++) {
1011                 if (argv[i][0] != '-') {
1012                         if (repodir)
1013                                 usage(argv[0]);
1014                         repodir = argv[i];
1015                 } else if (argv[i][1] == 'c') {
1016                         if (i + 1 >= argc)
1017                                 usage(argv[0]);
1018                         cachefile = argv[++i];
1019                 }
1020         }
1021         if (!repodir)
1022                 usage(argv[0]);
1023
1024         if (!realpath(repodir, repodirabs))
1025                 err(1, "realpath");
1026
1027         git_libgit2_init();
1028
1029         if (git_repository_open_ext(&repo, repodir,
1030                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1031                 e = giterr_last();
1032                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1033                 return 1;
1034         }
1035
1036         /* find HEAD */
1037         if (!git_revparse_single(&obj, repo, "HEAD"))
1038                 head = git_object_id(obj);
1039         git_object_free(obj);
1040
1041         /* don't cache if there is no HEAD */
1042         if (!head)
1043                 cachefile = NULL;
1044
1045         /* use directory name as name */
1046         if ((name = strrchr(repodirabs, '/')))
1047                 name++;
1048         else
1049                 name = "";
1050
1051         /* strip .git suffix */
1052         if (!(strippedname = strdup(name)))
1053                 err(1, "strdup");
1054         if ((p = strrchr(strippedname, '.')))
1055                 if (!strcmp(p, ".git"))
1056                         *p = '\0';
1057
1058         /* read description or .git/description */
1059         joinpath(path, sizeof(path), repodir, "description");
1060         if (!(fpread = fopen(path, "r"))) {
1061                 joinpath(path, sizeof(path), repodir, ".git/description");
1062                 fpread = fopen(path, "r");
1063         }
1064         if (fpread) {
1065                 if (!fgets(description, sizeof(description), fpread))
1066                         description[0] = '\0';
1067                 fclose(fpread);
1068         }
1069
1070         /* read url or .git/url */
1071         joinpath(path, sizeof(path), repodir, "url");
1072         if (!(fpread = fopen(path, "r"))) {
1073                 joinpath(path, sizeof(path), repodir, ".git/url");
1074                 fpread = fopen(path, "r");
1075         }
1076         if (fpread) {
1077                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1078                         cloneurl[0] = '\0';
1079                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1080                 fclose(fpread);
1081         }
1082
1083         /* check LICENSE */
1084         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1085                 git_object_type(obj) == GIT_OBJ_BLOB);
1086         git_object_free(obj);
1087
1088         /* check README */
1089         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1090                 git_object_type(obj) == GIT_OBJ_BLOB);
1091         git_object_free(obj);
1092
1093         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1094                 git_object_type(obj) == GIT_OBJ_BLOB);
1095         git_object_free(obj);
1096
1097         /* log for HEAD */
1098         fp = efopen("log.html", "w");
1099         relpath = "";
1100         mkdir("commit", 0755);
1101         writeheader(fp, "Log");
1102         fputs("<table id=\"log\"><thead>\n<tr><td>Date</td><td>Commit message</td>"
1103                   "<td>Author</td><td class=\"num\">Files</td><td class=\"num\">+</td>"
1104                   "<td class=\"num\">-</td></tr>\n</thead><tbody>\n", fp);
1105
1106         if (cachefile) {
1107                 /* read from cache file (does not need to exist) */
1108                 if ((rcachefp = fopen(cachefile, "r"))) {
1109                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1110                                 errx(1, "%s: no object id", cachefile);
1111                         if (git_oid_fromstr(&lastoid, lastoidstr))
1112                                 errx(1, "%s: invalid object id", cachefile);
1113                 }
1114
1115                 /* write log to (temporary) cache */
1116                 if ((fd = mkstemp(tmppath)) == -1)
1117                         err(1, "mkstemp");
1118                 if (!(wcachefp = fdopen(fd, "w")))
1119                         err(1, "fdopen");
1120                 /* write last commit id (HEAD) */
1121                 git_oid_tostr(buf, sizeof(buf), head);
1122                 fprintf(wcachefp, "%s\n", buf);
1123
1124                 writelog(fp, head);
1125
1126                 if (rcachefp) {
1127                         /* append previous log to log.html and the new cache */
1128                         while (!feof(rcachefp)) {
1129                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1130                                 if (ferror(rcachefp))
1131                                         err(1, "fread");
1132                                 if (fwrite(buf, 1, n, fp) != n ||
1133                                     fwrite(buf, 1, n, wcachefp) != n)
1134                                         err(1, "fwrite");
1135                         }
1136                         fclose(rcachefp);
1137                 }
1138                 fclose(wcachefp);
1139         } else {
1140                 if (head)
1141                         writelog(fp, head);
1142         }
1143
1144         fputs("</tbody></table>", fp);
1145         writefooter(fp);
1146         fclose(fp);
1147
1148         /* files for HEAD */
1149         fp = efopen("files.html", "w");
1150         writeheader(fp, "Files");
1151         if (head)
1152                 writefiles(fp, head);
1153         writefooter(fp);
1154         fclose(fp);
1155
1156         /* summary page with branches and tags */
1157         fp = efopen("refs.html", "w");
1158         writeheader(fp, "Refs");
1159         writerefs(fp);
1160         writefooter(fp);
1161         fclose(fp);
1162
1163         /* Atom feed */
1164         fp = efopen("atom.xml", "w");
1165         writeatom(fp);
1166         fclose(fp);
1167
1168         /* rename new cache file on success */
1169         if (cachefile && rename(tmppath, cachefile))
1170                 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1171
1172         /* cleanup */
1173         git_repository_free(repo);
1174         git_libgit2_shutdown();
1175
1176         return 0;
1177 }