stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <inttypes.h>
   7 #include <libgen.h>
   8 #include <limits.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13
  14 #include <git2.h>
  15
  16 #include "compat.h"
  17
  18 struct deltainfo {
  19         git_patch *patch;
  20
  21         size_t addcount;
  22         size_t delcount;
  23 };
  24
  25 struct commitinfo {
  26         const git_oid *id;
  27
  28         char oid[GIT_OID_HEXSZ + 1];
  29         char parentoid[GIT_OID_HEXSZ + 1];
  30
  31         const git_signature *author;
  32         const git_signature *committer;
  33         const char          *summary;
  34         const char          *msg;
  35
  36         git_diff   *diff;
  37         git_commit *commit;
  38         git_commit *parent;
  39         git_tree   *commit_tree;
  40         git_tree   *parent_tree;
  41
  42         size_t addcount;
  43         size_t delcount;
  44         size_t filecount;
  45
  46         struct deltainfo **deltas;
  47         size_t ndeltas;
  48 };
  49
  50 static git_repository *repo;
  51
  52 static const char *relpath = "";
  53 static const char *repodir;
  54
  55 static char *name = "";
  56 static char *strippedname = "";
  57 static char description[255];
  58 static char cloneurl[1024];
  59 static int haslicense, hasreadme, hassubmodules;
  60 static long long nlogcommits = -1; /* < 0 indicates not used */
  61
  62 /* cache */
  63 static git_oid lastoid;
  64 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  65 static FILE *rcachefp, *wcachefp;
  66 static const char *cachefile;
  67
  68 #ifndef USE_PLEDGE
  69 #define pledge(p1,p2) 0
  70 #endif
  71
  72 void
  73 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  74 {
  75         int r;
  76
  77         r = snprintf(buf, bufsiz, "%s%s%s",
  78                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  79         if (r == -1 || (size_t)r >= bufsiz)
  80                 errx(1, "path truncated: '%s%s%s'",
  81                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  82 }
  83
  84 void
  85 deltainfo_free(struct deltainfo *di)
  86 {
  87         if (!di)
  88                 return;
  89         git_patch_free(di->patch);
  90         di->patch = NULL;
  91         free(di);
  92 }
  93
  94 int
  95 commitinfo_getstats(struct commitinfo *ci)
  96 {
  97         struct deltainfo *di;
  98         const git_diff_delta *delta;
  99         const git_diff_hunk *hunk;
 100         const git_diff_line *line;
 101         git_patch *patch = NULL;
 102         size_t ndeltas, nhunks, nhunklines;
 103         size_t i, j, k;
 104
 105         ndeltas = git_diff_num_deltas(ci->diff);
 106         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 107                 err(1, "calloc");
 108
 109         for (i = 0; i < ndeltas; i++) {
 110                 if (git_patch_from_diff(&patch, ci->diff, i))
 111                         goto err;
 112                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 113                         err(1, "calloc");
 114                 di->patch = patch;
 115                 ci->deltas[i] = di;
 116
 117                 delta = git_patch_get_delta(patch);
 118
 119                 /* skip stats for binary data */
 120                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 121                         continue;
 122
 123                 nhunks = git_patch_num_hunks(patch);
 124                 for (j = 0; j < nhunks; j++) {
 125                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 126                                 break;
 127                         for (k = 0; ; k++) {
 128                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 129                                         break;
 130                                 if (line->old_lineno == -1) {
 131                                         di->addcount++;
 132                                         ci->addcount++;
 133                                 } else if (line->new_lineno == -1) {
 134                                         di->delcount++;
 135                                         ci->delcount++;
 136                                 }
 137                         }
 138                 }
 139         }
 140         ci->ndeltas = i;
 141         ci->filecount = i;
 142
 143         return 0;
 144
 145 err:
 146         if (ci->deltas)
 147                 for (i = 0; i < ci->ndeltas; i++)
 148                         deltainfo_free(ci->deltas[i]);
 149         free(ci->deltas);
 150         ci->deltas = NULL;
 151         ci->ndeltas = 0;
 152         ci->addcount = 0;
 153         ci->delcount = 0;
 154         ci->filecount = 0;
 155
 156         return -1;
 157 }
 158
 159 void
 160 commitinfo_free(struct commitinfo *ci)
 161 {
 162         size_t i;
 163
 164         if (!ci)
 165                 return;
 166         if (ci->deltas)
 167                 for (i = 0; i < ci->ndeltas; i++)
 168                         deltainfo_free(ci->deltas[i]);
 169         free(ci->deltas);
 170         ci->deltas = NULL;
 171         git_diff_free(ci->diff);
 172         git_tree_free(ci->commit_tree);
 173         git_tree_free(ci->parent_tree);
 174         git_commit_free(ci->commit);
 175         git_commit_free(ci->parent);
 176         free(ci);
 177 }
 178
 179 struct commitinfo *
 180 commitinfo_getbyoid(const git_oid *id)
 181 {
 182         struct commitinfo *ci;
 183         git_diff_options opts;
 184
 185         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 186                 err(1, "calloc");
 187
 188         if (git_commit_lookup(&(ci->commit), repo, id))
 189                 goto err;
 190         ci->id = id;
 191
 192         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 193         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 194
 195         ci->author = git_commit_author(ci->commit);
 196         ci->committer = git_commit_committer(ci->commit);
 197         ci->summary = git_commit_summary(ci->commit);
 198         ci->msg = git_commit_message(ci->commit);
 199
 200         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 201                 goto err;
 202         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 203                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 204                         ci->parent = NULL;
 205                         ci->parent_tree = NULL;
 206                 }
 207         }
 208
 209         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 210         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 211         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 212                 goto err;
 213
 214         return ci;
 215
 216 err:
 217         commitinfo_free(ci);
 218
 219         return NULL;
 220 }
 221
 222 FILE *
 223 efopen(const char *name, const char *flags)
 224 {
 225         FILE *fp;
 226
 227         if (!(fp = fopen(name, flags)))
 228                 err(1, "fopen: '%s'", name);
 229
 230         return fp;
 231 }
 232
 233 /* Escape characters below as HTML 2.0 / XML 1.0. */
 234 void
 235 xmlencode(FILE *fp, const char *s, size_t len)
 236 {
 237         size_t i;
 238
 239         for (i = 0; *s && i < len; s++, i++) {
 240                 switch(*s) {
 241                 case '<':  fputs("&lt;",   fp); break;
 242                 case '>':  fputs("&gt;",   fp); break;
 243                 case '\'': fputs("&#39;",  fp); break;
 244                 case '&':  fputs("&amp;",  fp); break;
 245                 case '"':  fputs("&quot;", fp); break;
 246                 default:   fputc(*s, fp);
 247                 }
 248         }
 249 }
 250
 251 int
 252 mkdirp(const char *path)
 253 {
 254         char tmp[PATH_MAX], *p;
 255
 256         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 257                 errx(1, "path truncated: '%s'", path);
 258         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 259                 if (*p != '/')
 260                         continue;
 261                 *p = '\0';
 262                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 263                         return -1;
 264                 *p = '/';
 265         }
 266         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 267                 return -1;
 268         return 0;
 269 }
 270
 271 void
 272 printtimez(FILE *fp, const git_time *intime)
 273 {
 274         struct tm *intm;
 275         time_t t;
 276         char out[32];
 277
 278         t = (time_t)intime->time;
 279         if (!(intm = gmtime(&t)))
 280                 return;
 281         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 282         fputs(out, fp);
 283 }
 284
 285 void
 286 printtime(FILE *fp, const git_time *intime)
 287 {
 288         struct tm *intm;
 289         time_t t;
 290         char out[32];
 291
 292         t = (time_t)intime->time + (intime->offset * 60);
 293         if (!(intm = gmtime(&t)))
 294                 return;
 295         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 296         if (intime->offset < 0)
 297                 fprintf(fp, "%s -%02d%02d", out,
 298                             -(intime->offset) / 60, -(intime->offset) % 60);
 299         else
 300                 fprintf(fp, "%s +%02d%02d", out,
 301                             intime->offset / 60, intime->offset % 60);
 302 }
 303
 304 void
 305 printtimeshort(FILE *fp, const git_time *intime)
 306 {
 307         struct tm *intm;
 308         time_t t;
 309         char out[32];
 310
 311         t = (time_t)intime->time;
 312         if (!(intm = gmtime(&t)))
 313                 return;
 314         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 315         fputs(out, fp);
 316 }
 317
 318 void
 319 writeheader(FILE *fp, const char *title)
 320 {
 321         fputs("<!DOCTYPE html>\n"
 322                 "<html>\n<head>\n"
 323                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 324                 "<title>", fp);
 325         xmlencode(fp, title, strlen(title));
 326         if (title[0] && strippedname[0])
 327                 fputs(" - ", fp);
 328         xmlencode(fp, strippedname, strlen(strippedname));
 329         if (description[0])
 330                 fputs(" - ", fp);
 331         xmlencode(fp, description, strlen(description));
 332         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 333         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 334                 name, relpath);
 335         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 336         fputs("</head>\n<body>\n<table><tr><td>", fp);
 337         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 338                 relpath, relpath);
 339         fputs("</td><td><h1>", fp);
 340         xmlencode(fp, strippedname, strlen(strippedname));
 341         fputs("</h1><span class=\"desc\">", fp);
 342         xmlencode(fp, description, strlen(description));
 343         fputs("</span></td></tr>", fp);
 344         if (cloneurl[0]) {
 345                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 346                 xmlencode(fp, cloneurl, strlen(cloneurl));
 347                 fputs("\">", fp);
 348                 xmlencode(fp, cloneurl, strlen(cloneurl));
 349                 fputs("</a></td></tr>", fp);
 350         }
 351         fputs("<tr><td></td><td>\n", fp);
 352         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 353         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 354         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 355         if (hassubmodules)
 356                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 357         if (hasreadme)
 358                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 359         if (haslicense)
 360                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 361         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 362 }
 363
 364 void
 365 writefooter(FILE *fp)
 366 {
 367         fputs("</div>\n</body>\n</html>\n", fp);
 368 }
 369
 370 int
 371 writeblobhtml(FILE *fp, const git_blob *blob)
 372 {
 373         size_t n = 0, i, prev;
 374         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 375         const char *s = git_blob_rawcontent(blob);
 376         git_off_t len = git_blob_rawsize(blob);
 377
 378         fputs("<pre id=\"blob\">\n", fp);
 379
 380         if (len > 0) {
 381                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 382                         if (s[i] != '\n')
 383                                 continue;
 384                         n++;
 385                         fprintf(fp, nfmt, n, n, n);
 386                         xmlencode(fp, &s[prev], i - prev + 1);
 387                         prev = i + 1;
 388                 }
 389                 /* trailing data */
 390                 if ((len - prev) > 0) {
 391                         n++;
 392                         fprintf(fp, nfmt, n, n, n);
 393                         xmlencode(fp, &s[prev], len - prev);
 394                 }
 395         }
 396
 397         fputs("</pre>\n", fp);
 398
 399         return n;
 400 }
 401
 402 void
 403 printcommit(FILE *fp, struct commitinfo *ci)
 404 {
 405         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 406                 relpath, ci->oid, ci->oid);
 407
 408         if (ci->parentoid[0])
 409                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 410                         relpath, ci->parentoid, ci->parentoid);
 411
 412         if (ci->author) {
 413                 fputs("<b>Author:</b> ", fp);
 414                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 415                 fputs(" &lt;<a href=\"mailto:", fp);
 416                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 417                 fputs("\">", fp);
 418                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 419                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 420                 printtime(fp, &(ci->author->when));
 421                 fputc('\n', fp);
 422         }
 423         if (ci->msg) {
 424                 fputc('\n', fp);
 425                 xmlencode(fp, ci->msg, strlen(ci->msg));
 426                 fputc('\n', fp);
 427         }
 428 }
 429
 430 void
 431 printshowfile(FILE *fp, struct commitinfo *ci)
 432 {
 433         const git_diff_delta *delta;
 434         const git_diff_hunk *hunk;
 435         const git_diff_line *line;
 436         git_patch *patch;
 437         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 438         char linestr[80];
 439
 440         printcommit(fp, ci);
 441
 442         if (!ci->deltas)
 443                 return;
 444
 445         if (ci->filecount > 1000   ||
 446             ci->ndeltas   > 1000   ||
 447             ci->addcount  > 100000 ||
 448             ci->delcount  > 100000) {
 449                 fputs("Diff is too large, output suppressed.\n", fp);
 450                 return;
 451         }
 452
 453         /* diff stat */
 454         fputs("<b>Diffstat:</b>\n<table>", fp);
 455         for (i = 0; i < ci->ndeltas; i++) {
 456                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 457                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 458                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 459                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 460                         fputs(" -&gt; ", fp);
 461                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 462                 }
 463
 464                 add = ci->deltas[i]->addcount;
 465                 del = ci->deltas[i]->delcount;
 466                 changed = add + del;
 467                 total = sizeof(linestr) - 2;
 468                 if (changed > total) {
 469                         if (add)
 470                                 add = ((float)total / changed * add) + 1;
 471                         if (del)
 472                                 del = ((float)total / changed * del) + 1;
 473                 }
 474                 memset(&linestr, '+', add);
 475                 memset(&linestr[add], '-', del);
 476
 477                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 478                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 479                 fwrite(&linestr, 1, add, fp);
 480                 fputs("</span><span class=\"d\">", fp);
 481                 fwrite(&linestr[add], 1, del, fp);
 482                 fputs("</span></td></tr>\n", fp);
 483         }
 484         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 485                 ci->filecount, ci->filecount == 1 ? "" : "s",
 486                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 487                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 488
 489         fputs("<hr/>", fp);
 490
 491         for (i = 0; i < ci->ndeltas; i++) {
 492                 patch = ci->deltas[i]->patch;
 493                 delta = git_patch_get_delta(patch);
 494                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/%s.html\">%s</a> b/<a href=\"%sfile/%s.html\">%s</a></b>\n",
 495                         i, relpath, delta->old_file.path, delta->old_file.path,
 496                         relpath, delta->new_file.path, delta->new_file.path);
 497
 498                 /* check binary data */
 499                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 500                         fputs("Binary files differ.\n", fp);
 501                         continue;
 502                 }
 503
 504                 nhunks = git_patch_num_hunks(patch);
 505                 for (j = 0; j < nhunks; j++) {
 506                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 507                                 break;
 508
 509                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 510                         xmlencode(fp, hunk->header, hunk->header_len);
 511                         fputs("</a>", fp);
 512
 513                         for (k = 0; ; k++) {
 514                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 515                                         break;
 516                                 if (line->old_lineno == -1)
 517                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 518                                                 i, j, k, i, j, k);
 519                                 else if (line->new_lineno == -1)
 520                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 521                                                 i, j, k, i, j, k);
 522                                 else
 523                                         fputc(' ', fp);
 524                                 xmlencode(fp, line->content, line->content_len);
 525                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 526                                         fputs("</a>", fp);
 527                         }
 528                 }
 529         }
 530 }
 531
 532 void
 533 writelogline(FILE *fp, struct commitinfo *ci)
 534 {
 535         fputs("<tr><td>", fp);
 536         if (ci->author)
 537                 printtimeshort(fp, &(ci->author->when));
 538         fputs("</td><td>", fp);
 539         if (ci->summary) {
 540                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 541                 xmlencode(fp, ci->summary, strlen(ci->summary));
 542                 fputs("</a>", fp);
 543         }
 544         fputs("</td><td>", fp);
 545         if (ci->author)
 546                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 547         fputs("</td><td class=\"num\" align=\"right\">", fp);
 548         fprintf(fp, "%zu", ci->filecount);
 549         fputs("</td><td class=\"num\" align=\"right\">", fp);
 550         fprintf(fp, "+%zu", ci->addcount);
 551         fputs("</td><td class=\"num\" align=\"right\">", fp);
 552         fprintf(fp, "-%zu", ci->delcount);
 553         fputs("</td></tr>\n", fp);
 554 }
 555
 556 int
 557 writelog(FILE *fp, const git_oid *oid)
 558 {
 559         struct commitinfo *ci;
 560         git_revwalk *w = NULL;
 561         git_oid id;
 562         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 563         FILE *fpfile;
 564         int r;
 565
 566         git_revwalk_new(&w, repo);
 567         git_revwalk_push(w, oid);
 568         git_revwalk_sorting(w, GIT_SORT_TIME);
 569         git_revwalk_simplify_first_parent(w);
 570
 571         while (!git_revwalk_next(&id, w)) {
 572                 relpath = "";
 573
 574                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 575                         break;
 576
 577                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 578                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 579                 if (r == -1 || (size_t)r >= sizeof(path))
 580                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 581                 r = access(path, F_OK);
 582
 583                 /* optimization: if there are no log lines to write and
 584                    the commit file already exists: skip the diffstat */
 585                 if (!nlogcommits && !r)
 586                         continue;
 587
 588                 if (!(ci = commitinfo_getbyoid(&id)))
 589                         break;
 590                 /* diffstat: for stagit HTML required for the log.html line */
 591                 if (commitinfo_getstats(ci) == -1)
 592                         goto err;
 593
 594                 if (nlogcommits < 0) {
 595                         writelogline(fp, ci);
 596                 } else if (nlogcommits > 0) {
 597                         writelogline(fp, ci);
 598                         nlogcommits--;
 599                 }
 600
 601                 if (cachefile)
 602                         writelogline(wcachefp, ci);
 603
 604                 /* check if file exists if so skip it */
 605                 if (r) {
 606                         relpath = "../";
 607                         fpfile = efopen(path, "w");
 608                         writeheader(fpfile, ci->summary);
 609                         fputs("<pre>", fpfile);
 610                         printshowfile(fpfile, ci);
 611                         fputs("</pre>\n", fpfile);
 612                         writefooter(fpfile);
 613                         fclose(fpfile);
 614                 }
 615 err:
 616                 commitinfo_free(ci);
 617         }
 618         git_revwalk_free(w);
 619
 620         relpath = "";
 621
 622         return 0;
 623 }
 624
 625 void
 626 printcommitatom(FILE *fp, struct commitinfo *ci)
 627 {
 628         fputs("<entry>\n", fp);
 629
 630         fprintf(fp, "<id>%s</id>\n", ci->oid);
 631         if (ci->author) {
 632                 fputs("<published>", fp);
 633                 printtimez(fp, &(ci->author->when));
 634                 fputs("</published>\n", fp);
 635         }
 636         if (ci->committer) {
 637                 fputs("<updated>", fp);
 638                 printtimez(fp, &(ci->committer->when));
 639                 fputs("</updated>\n", fp);
 640         }
 641         if (ci->summary) {
 642                 fputs("<title type=\"text\">", fp);
 643                 xmlencode(fp, ci->summary, strlen(ci->summary));
 644                 fputs("</title>\n", fp);
 645         }
 646         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 647                 ci->oid);
 648
 649         if (ci->author) {
 650                 fputs("<author><name>", fp);
 651                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 652                 fputs("</name>\n<email>", fp);
 653                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 654                 fputs("</email>\n</author>\n", fp);
 655         }
 656
 657         fputs("<content type=\"text\">", fp);
 658         fprintf(fp, "commit %s\n", ci->oid);
 659         if (ci->parentoid[0])
 660                 fprintf(fp, "parent %s\n", ci->parentoid);
 661         if (ci->author) {
 662                 fputs("Author: ", fp);
 663                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 664                 fputs(" &lt;", fp);
 665                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 666                 fputs("&gt;\nDate:   ", fp);
 667                 printtime(fp, &(ci->author->when));
 668                 fputc('\n', fp);
 669         }
 670         if (ci->msg) {
 671                 fputc('\n', fp);
 672                 xmlencode(fp, ci->msg, strlen(ci->msg));
 673         }
 674         fputs("\n</content>\n</entry>\n", fp);
 675 }
 676
 677 int
 678 writeatom(FILE *fp)
 679 {
 680         struct commitinfo *ci;
 681         git_revwalk *w = NULL;
 682         git_oid id;
 683         size_t i, m = 100; /* last 'm' commits */
 684
 685         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 686               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 687         xmlencode(fp, strippedname, strlen(strippedname));
 688         fputs(", branch HEAD</title>\n<subtitle>", fp);
 689         xmlencode(fp, description, strlen(description));
 690         fputs("</subtitle>\n", fp);
 691
 692         git_revwalk_new(&w, repo);
 693         git_revwalk_push_head(w);
 694         git_revwalk_sorting(w, GIT_SORT_TIME);
 695         git_revwalk_simplify_first_parent(w);
 696
 697         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 698                 if (!(ci = commitinfo_getbyoid(&id)))
 699                         break;
 700                 printcommitatom(fp, ci);
 701                 commitinfo_free(ci);
 702         }
 703         git_revwalk_free(w);
 704
 705         fputs("</feed>\n", fp);
 706
 707         return 0;
 708 }
 709
 710 int
 711 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 712 {
 713         char tmp[PATH_MAX] = "", *d;
 714         const char *p;
 715         int lc = 0;
 716         FILE *fp;
 717
 718         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 719                 errx(1, "path truncated: '%s'", fpath);
 720         if (!(d = dirname(tmp)))
 721                 err(1, "dirname");
 722         if (mkdirp(d))
 723                 return -1;
 724
 725         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 726                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 727                         errx(1, "path truncated: '../%s'", tmp);
 728         }
 729         relpath = tmp;
 730
 731         fp = efopen(fpath, "w");
 732         writeheader(fp, filename);
 733         fputs("<p> ", fp);
 734         xmlencode(fp, filename, strlen(filename));
 735         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 736         fputs("</p><hr/>", fp);
 737
 738         if (git_blob_is_binary((git_blob *)obj)) {
 739                 fputs("<p>Binary file.</p>\n", fp);
 740         } else {
 741                 lc = writeblobhtml(fp, (git_blob *)obj);
 742                 if (ferror(fp))
 743                         err(1, "fwrite");
 744         }
 745         writefooter(fp);
 746         fclose(fp);
 747
 748         relpath = "";
 749
 750         return lc;
 751 }
 752
 753 const char *
 754 filemode(git_filemode_t m)
 755 {
 756         static char mode[11];
 757
 758         memset(mode, '-', sizeof(mode) - 1);
 759         mode[10] = '\0';
 760
 761         if (S_ISREG(m))
 762                 mode[0] = '-';
 763         else if (S_ISBLK(m))
 764                 mode[0] = 'b';
 765         else if (S_ISCHR(m))
 766                 mode[0] = 'c';
 767         else if (S_ISDIR(m))
 768                 mode[0] = 'd';
 769         else if (S_ISFIFO(m))
 770                 mode[0] = 'p';
 771         else if (S_ISLNK(m))
 772                 mode[0] = 'l';
 773         else if (S_ISSOCK(m))
 774                 mode[0] = 's';
 775         else
 776                 mode[0] = '?';
 777
 778         if (m & S_IRUSR) mode[1] = 'r';
 779         if (m & S_IWUSR) mode[2] = 'w';
 780         if (m & S_IXUSR) mode[3] = 'x';
 781         if (m & S_IRGRP) mode[4] = 'r';
 782         if (m & S_IWGRP) mode[5] = 'w';
 783         if (m & S_IXGRP) mode[6] = 'x';
 784         if (m & S_IROTH) mode[7] = 'r';
 785         if (m & S_IWOTH) mode[8] = 'w';
 786         if (m & S_IXOTH) mode[9] = 'x';
 787
 788         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 789         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 790         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 791
 792         return mode;
 793 }
 794
 795 int
 796 writefilestree(FILE *fp, git_tree *tree, const char *path)
 797 {
 798         const git_tree_entry *entry = NULL;
 799         git_submodule *module = NULL;
 800         git_object *obj = NULL;
 801         git_off_t filesize;
 802         const char *entryname;
 803         char filepath[PATH_MAX], entrypath[PATH_MAX];
 804         size_t count, i;
 805         int lc, r, ret;
 806
 807         count = git_tree_entrycount(tree);
 808         for (i = 0; i < count; i++) {
 809                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 810                     !(entryname = git_tree_entry_name(entry)))
 811                         return -1;
 812                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 813
 814                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 815                          entrypath);
 816                 if (r == -1 || (size_t)r >= sizeof(filepath))
 817                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 818
 819                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 820                         switch (git_object_type(obj)) {
 821                         case GIT_OBJ_BLOB:
 822                                 break;
 823                         case GIT_OBJ_TREE:
 824                                 /* NOTE: recurses */
 825                                 ret = writefilestree(fp, (git_tree *)obj,
 826                                                      entrypath);
 827                                 git_object_free(obj);
 828                                 if (ret)
 829                                         return ret;
 830                                 continue;
 831                         default:
 832                                 git_object_free(obj);
 833                                 continue;
 834                         }
 835
 836                         filesize = git_blob_rawsize((git_blob *)obj);
 837                         lc = writeblob(obj, filepath, entryname, filesize);
 838
 839                         fputs("<tr><td>", fp);
 840                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 841                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 842                         xmlencode(fp, entrypath, strlen(entrypath));
 843                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 844                         if (lc > 0)
 845                                 fprintf(fp, "%dL", lc);
 846                         else
 847                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 848                         fputs("</td></tr>\n", fp);
 849                         git_object_free(obj);
 850                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 851                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 852                                 relpath);
 853                         xmlencode(fp, entrypath, strlen(entrypath));
 854                         git_submodule_free(module);
 855                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 856                 }
 857         }
 858
 859         return 0;
 860 }
 861
 862 int
 863 writefiles(FILE *fp, const git_oid *id)
 864 {
 865         git_tree *tree = NULL;
 866         git_commit *commit = NULL;
 867         int ret = -1;
 868
 869         fputs("<table id=\"files\"><thead>\n<tr>"
 870               "<td><b>Mode</b></td><td><b>Name</b></td>"
 871               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 872               "</tr>\n</thead><tbody>\n", fp);
 873
 874         if (!git_commit_lookup(&commit, repo, id) &&
 875             !git_commit_tree(&tree, commit))
 876                 ret = writefilestree(fp, tree, "");
 877
 878         fputs("</tbody></table>", fp);
 879
 880         git_commit_free(commit);
 881         git_tree_free(tree);
 882
 883         return ret;
 884 }
 885
 886 int
 887 refs_cmp(const void *v1, const void *v2)
 888 {
 889         git_reference *r1 = (*(git_reference **)v1);
 890         git_reference *r2 = (*(git_reference **)v2);
 891         int r;
 892
 893         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 894                 return r;
 895
 896         return strcmp(git_reference_shorthand(r1),
 897                       git_reference_shorthand(r2));
 898 }
 899
 900 int
 901 writerefs(FILE *fp)
 902 {
 903         struct commitinfo *ci;
 904         const git_oid *id = NULL;
 905         git_object *obj = NULL;
 906         git_reference *dref = NULL, *r, *ref = NULL;
 907         git_reference_iterator *it = NULL;
 908         git_reference **refs = NULL;
 909         size_t count, i, j, refcount;
 910         const char *titles[] = { "Branches", "Tags" };
 911         const char *ids[] = { "branches", "tags" };
 912         const char *name;
 913
 914         if (git_reference_iterator_new(&it, repo))
 915                 return -1;
 916
 917         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 918                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 919                         err(1, "realloc");
 920                 refs[refcount] = ref;
 921         }
 922         git_reference_iterator_free(it);
 923
 924         /* sort by type then shorthand name */
 925         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 926
 927         for (j = 0; j < 2; j++) {
 928                 for (i = 0, count = 0; i < refcount; i++) {
 929                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 930                             !(git_reference_is_tag(refs[i]) && j == 1))
 931                                 continue;
 932
 933                         switch (git_reference_type(refs[i])) {
 934                         case GIT_REF_SYMBOLIC:
 935                                 if (git_reference_resolve(&dref, refs[i]))
 936                                         goto err;
 937                                 r = dref;
 938                                 break;
 939                         case GIT_REF_OID:
 940                                 r = refs[i];
 941                                 break;
 942                         default:
 943                                 continue;
 944                         }
 945                         if (!git_reference_target(r) ||
 946                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 947                                 goto err;
 948                         if (!(id = git_object_id(obj)))
 949                                 goto err;
 950                         if (!(ci = commitinfo_getbyoid(id)))
 951                                 break;
 952
 953                         /* print header if it has an entry (first). */
 954                         if (++count == 1) {
 955                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 956                                         "<thead>\n<tr><td><b>Name</b></td>"
 957                                         "<td><b>Last commit date</b></td>"
 958                                         "<td><b>Author</b></td>\n</tr>\n"
 959                                         "</thead><tbody>\n",
 960                                          titles[j], ids[j]);
 961                         }
 962
 963                         relpath = "";
 964                         name = git_reference_shorthand(r);
 965
 966                         fputs("<tr><td>", fp);
 967                         xmlencode(fp, name, strlen(name));
 968                         fputs("</td><td>", fp);
 969                         if (ci->author)
 970                                 printtimeshort(fp, &(ci->author->when));
 971                         fputs("</td><td>", fp);
 972                         if (ci->author)
 973                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 974                         fputs("</td></tr>\n", fp);
 975
 976                         relpath = "../";
 977
 978                         commitinfo_free(ci);
 979                         git_object_free(obj);
 980                         obj = NULL;
 981                         git_reference_free(dref);
 982                         dref = NULL;
 983                 }
 984                 /* table footer */
 985                 if (count)
 986                         fputs("</tbody></table><br/>", fp);
 987         }
 988
 989 err:
 990         git_object_free(obj);
 991         git_reference_free(dref);
 992
 993         for (i = 0; i < refcount; i++)
 994                 git_reference_free(refs[i]);
 995         free(refs);
 996
 997         return 0;
 998 }
 999
1000 void
1001 usage(char *argv0)
1002 {
1003         fprintf(stderr, "%s [-c cachefile] [-l commits] repodir\n", argv0);
1004         exit(1);
1005 }
1006
1007 int
1008 main(int argc, char *argv[])
1009 {
1010         git_object *obj = NULL;
1011         const git_oid *head = NULL;
1012         const git_error *e = NULL;
1013         mode_t mask;
1014         FILE *fp, *fpread;
1015         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1016         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1017         size_t n;
1018         int i, fd;
1019
1020         if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1021                 err(1, "pledge");
1022
1023         for (i = 1; i < argc; i++) {
1024                 if (argv[i][0] != '-') {
1025                         if (repodir)
1026                                 usage(argv[0]);
1027                         repodir = argv[i];
1028                 } else if (argv[i][1] == 'c') {
1029                         if (nlogcommits > 0 || i + 1 >= argc)
1030                                 usage(argv[0]);
1031                         cachefile = argv[++i];
1032                 } else if (argv[i][1] == 'l') {
1033                         if (cachefile || i + 1 >= argc)
1034                                 usage(argv[0]);
1035                         errno = 0;
1036                         nlogcommits = strtoll(argv[++i], &p, 10);
1037                         if (argv[i][0] == '\0' || *p != '\0' ||
1038                             nlogcommits <= 0)
1039                                 usage(argv[0]);
1040                         if (errno == ERANGE && (nlogcommits == LLONG_MAX ||
1041                             nlogcommits == LLONG_MIN))
1042                                 usage(argv[0]);
1043                 }
1044         }
1045         if (!cachefile && pledge("stdio rpath wpath cpath", NULL) == -1)
1046                 err(1, "pledge");
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                 head = git_object_id(obj);
1065         git_object_free(obj);
1066
1067         /* use directory name as name */
1068         if ((name = strrchr(repodirabs, '/')))
1069                 name++;
1070         else
1071                 name = "";
1072
1073         /* strip .git suffix */
1074         if (!(strippedname = strdup(name)))
1075                 err(1, "strdup");
1076         if ((p = strrchr(strippedname, '.')))
1077                 if (!strcmp(p, ".git"))
1078                         *p = '\0';
1079
1080         /* read description or .git/description */
1081         joinpath(path, sizeof(path), repodir, "description");
1082         if (!(fpread = fopen(path, "r"))) {
1083                 joinpath(path, sizeof(path), repodir, ".git/description");
1084                 fpread = fopen(path, "r");
1085         }
1086         if (fpread) {
1087                 if (!fgets(description, sizeof(description), fpread))
1088                         description[0] = '\0';
1089                 fclose(fpread);
1090         }
1091
1092         /* read url or .git/url */
1093         joinpath(path, sizeof(path), repodir, "url");
1094         if (!(fpread = fopen(path, "r"))) {
1095                 joinpath(path, sizeof(path), repodir, ".git/url");
1096                 fpread = fopen(path, "r");
1097         }
1098         if (fpread) {
1099                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1100                         cloneurl[0] = '\0';
1101                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1102                 fclose(fpread);
1103         }
1104
1105         /* check LICENSE */
1106         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1107                 git_object_type(obj) == GIT_OBJ_BLOB);
1108         git_object_free(obj);
1109
1110         /* check README */
1111         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1112                 git_object_type(obj) == GIT_OBJ_BLOB);
1113         git_object_free(obj);
1114
1115         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1116                 git_object_type(obj) == GIT_OBJ_BLOB);
1117         git_object_free(obj);
1118
1119         /* log for HEAD */
1120         fp = efopen("log.html", "w");
1121         relpath = "";
1122         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1123         writeheader(fp, "Log");
1124         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1125               "<td><b>Commit message</b></td>"
1126               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1127               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1128               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1129
1130         if (cachefile && head) {
1131                 /* read from cache file (does not need to exist) */
1132                 if ((rcachefp = fopen(cachefile, "r"))) {
1133                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1134                                 errx(1, "%s: no object id", cachefile);
1135                         if (git_oid_fromstr(&lastoid, lastoidstr))
1136                                 errx(1, "%s: invalid object id", cachefile);
1137                 }
1138
1139                 /* write log to (temporary) cache */
1140                 if ((fd = mkstemp(tmppath)) == -1)
1141                         err(1, "mkstemp");
1142                 if (!(wcachefp = fdopen(fd, "w")))
1143                         err(1, "fdopen: '%s'", tmppath);
1144                 /* write last commit id (HEAD) */
1145                 git_oid_tostr(buf, sizeof(buf), head);
1146                 fprintf(wcachefp, "%s\n", buf);
1147
1148                 writelog(fp, head);
1149
1150                 if (rcachefp) {
1151                         /* append previous log to log.html and the new cache */
1152                         while (!feof(rcachefp)) {
1153                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1154                                 if (ferror(rcachefp))
1155                                         err(1, "fread");
1156                                 if (fwrite(buf, 1, n, fp) != n ||
1157                                     fwrite(buf, 1, n, wcachefp) != n)
1158                                         err(1, "fwrite");
1159                         }
1160                         fclose(rcachefp);
1161                 }
1162                 fclose(wcachefp);
1163         } else {
1164                 if (head)
1165                         writelog(fp, head);
1166         }
1167
1168         fputs("</tbody></table>", fp);
1169         writefooter(fp);
1170         fclose(fp);
1171
1172         /* files for HEAD */
1173         fp = efopen("files.html", "w");
1174         writeheader(fp, "Files");
1175         if (head)
1176                 writefiles(fp, head);
1177         writefooter(fp);
1178         fclose(fp);
1179
1180         /* summary page with branches and tags */
1181         fp = efopen("refs.html", "w");
1182         writeheader(fp, "Refs");
1183         writerefs(fp);
1184         writefooter(fp);
1185         fclose(fp);
1186
1187         /* Atom feed */
1188         fp = efopen("atom.xml", "w");
1189         writeatom(fp);
1190         fclose(fp);
1191
1192         /* rename new cache file on success */
1193         if (cachefile && head) {
1194                 if (rename(tmppath, cachefile))
1195                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1196                 umask((mask = umask(0)));
1197                 if (chmod(cachefile,
1198                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1199                         err(1, "chmod: '%s'", cachefile);
1200         }
1201
1202         /* cleanup */
1203         git_repository_free(repo);
1204         git_libgit2_shutdown();
1205
1206         return 0;
1207 }