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 void
  69 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  70 {
  71         int r;
  72
  73         r = snprintf(buf, bufsiz, "%s%s%s",
  74                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  75         if (r == -1 || (size_t)r >= bufsiz)
  76                 errx(1, "path truncated: '%s%s%s'",
  77                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  78 }
  79
  80 void
  81 deltainfo_free(struct deltainfo *di)
  82 {
  83         if (!di)
  84                 return;
  85         git_patch_free(di->patch);
  86         memset(di, 0, sizeof(*di));
  87         free(di);
  88 }
  89
  90 int
  91 commitinfo_getstats(struct commitinfo *ci)
  92 {
  93         struct deltainfo *di;
  94         git_diff_options opts;
  95         git_diff_find_options fopts;
  96         const git_diff_delta *delta;
  97         const git_diff_hunk *hunk;
  98         const git_diff_line *line;
  99         git_patch *patch = NULL;
 100         size_t ndeltas, nhunks, nhunklines;
 101         size_t i, j, k;
 102
 103         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 104                 goto err;
 105         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 106                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 107                         ci->parent = NULL;
 108                         ci->parent_tree = NULL;
 109                 }
 110         }
 111
 112         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 113         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 114         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 115                 goto err;
 116
 117         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 118                 goto err;
 119         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES;
 120         if (git_diff_find_similar(ci->diff, &fopts))
 121                 goto err;
 122
 123         ndeltas = git_diff_num_deltas(ci->diff);
 124         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 125                 err(1, "calloc");
 126
 127         for (i = 0; i < ndeltas; i++) {
 128                 if (git_patch_from_diff(&patch, ci->diff, i))
 129                         goto err;
 130
 131                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 132                         err(1, "calloc");
 133                 di->patch = patch;
 134                 ci->deltas[i] = di;
 135
 136                 delta = git_patch_get_delta(patch);
 137
 138                 /* skip stats for binary data */
 139                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 140                         continue;
 141
 142                 nhunks = git_patch_num_hunks(patch);
 143                 for (j = 0; j < nhunks; j++) {
 144                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 145                                 break;
 146                         for (k = 0; ; k++) {
 147                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 148                                         break;
 149                                 if (line->old_lineno == -1) {
 150                                         di->addcount++;
 151                                         ci->addcount++;
 152                                 } else if (line->new_lineno == -1) {
 153                                         di->delcount++;
 154                                         ci->delcount++;
 155                                 }
 156                         }
 157                 }
 158         }
 159         ci->ndeltas = i;
 160         ci->filecount = i;
 161
 162         return 0;
 163
 164 err:
 165         git_diff_free(ci->diff);
 166         ci->diff = NULL;
 167         git_tree_free(ci->commit_tree);
 168         ci->commit_tree = NULL;
 169         git_tree_free(ci->parent_tree);
 170         ci->parent_tree = NULL;
 171         git_commit_free(ci->parent);
 172         ci->parent = NULL;
 173
 174         if (ci->deltas)
 175                 for (i = 0; i < ci->ndeltas; i++)
 176                         deltainfo_free(ci->deltas[i]);
 177         free(ci->deltas);
 178         ci->deltas = NULL;
 179         ci->ndeltas = 0;
 180         ci->addcount = 0;
 181         ci->delcount = 0;
 182         ci->filecount = 0;
 183
 184         return -1;
 185 }
 186
 187 void
 188 commitinfo_free(struct commitinfo *ci)
 189 {
 190         size_t i;
 191
 192         if (!ci)
 193                 return;
 194         if (ci->deltas)
 195                 for (i = 0; i < ci->ndeltas; i++)
 196                         deltainfo_free(ci->deltas[i]);
 197
 198         free(ci->deltas);
 199         git_diff_free(ci->diff);
 200         git_tree_free(ci->commit_tree);
 201         git_tree_free(ci->parent_tree);
 202         git_commit_free(ci->commit);
 203         git_commit_free(ci->parent);
 204         memset(ci, 0, sizeof(*ci));
 205         free(ci);
 206 }
 207
 208 struct commitinfo *
 209 commitinfo_getbyoid(const git_oid *id)
 210 {
 211         struct commitinfo *ci;
 212
 213         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 214                 err(1, "calloc");
 215
 216         if (git_commit_lookup(&(ci->commit), repo, id))
 217                 goto err;
 218         ci->id = id;
 219
 220         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 221         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 222
 223         ci->author = git_commit_author(ci->commit);
 224         ci->committer = git_commit_committer(ci->commit);
 225         ci->summary = git_commit_summary(ci->commit);
 226         ci->msg = git_commit_message(ci->commit);
 227
 228         return ci;
 229
 230 err:
 231         commitinfo_free(ci);
 232
 233         return NULL;
 234 }
 235
 236 FILE *
 237 efopen(const char *name, const char *flags)
 238 {
 239         FILE *fp;
 240
 241         if (!(fp = fopen(name, flags)))
 242                 err(1, "fopen: '%s'", name);
 243
 244         return fp;
 245 }
 246
 247 /* Escape characters below as HTML 2.0 / XML 1.0. */
 248 void
 249 xmlencode(FILE *fp, const char *s, size_t len)
 250 {
 251         size_t i;
 252
 253         for (i = 0; *s && i < len; s++, i++) {
 254                 switch(*s) {
 255                 case '<':  fputs("&lt;",   fp); break;
 256                 case '>':  fputs("&gt;",   fp); break;
 257                 case '\'': fputs("&#39;",  fp); break;
 258                 case '&':  fputs("&amp;",  fp); break;
 259                 case '"':  fputs("&quot;", fp); break;
 260                 default:   fputc(*s, fp);
 261                 }
 262         }
 263 }
 264
 265 int
 266 mkdirp(const char *path)
 267 {
 268         char tmp[PATH_MAX], *p;
 269
 270         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 271                 errx(1, "path truncated: '%s'", path);
 272         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 273                 if (*p != '/')
 274                         continue;
 275                 *p = '\0';
 276                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 277                         return -1;
 278                 *p = '/';
 279         }
 280         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 281                 return -1;
 282         return 0;
 283 }
 284
 285 void
 286 printtimez(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;
 293         if (!(intm = gmtime(&t)))
 294                 return;
 295         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 296         fputs(out, fp);
 297 }
 298
 299 void
 300 printtime(FILE *fp, const git_time *intime)
 301 {
 302         struct tm *intm;
 303         time_t t;
 304         char out[32];
 305
 306         t = (time_t)intime->time + (intime->offset * 60);
 307         if (!(intm = gmtime(&t)))
 308                 return;
 309         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 310         if (intime->offset < 0)
 311                 fprintf(fp, "%s -%02d%02d", out,
 312                             -(intime->offset) / 60, -(intime->offset) % 60);
 313         else
 314                 fprintf(fp, "%s +%02d%02d", out,
 315                             intime->offset / 60, intime->offset % 60);
 316 }
 317
 318 void
 319 printtimeshort(FILE *fp, const git_time *intime)
 320 {
 321         struct tm *intm;
 322         time_t t;
 323         char out[32];
 324
 325         t = (time_t)intime->time;
 326         if (!(intm = gmtime(&t)))
 327                 return;
 328         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 329         fputs(out, fp);
 330 }
 331
 332 void
 333 writeheader(FILE *fp, const char *title)
 334 {
 335         fputs("<!DOCTYPE html>\n"
 336                 "<html>\n<head>\n"
 337                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 338                 "<title>", fp);
 339         xmlencode(fp, title, strlen(title));
 340         if (title[0] && strippedname[0])
 341                 fputs(" - ", fp);
 342         xmlencode(fp, strippedname, strlen(strippedname));
 343         if (description[0])
 344                 fputs(" - ", fp);
 345         xmlencode(fp, description, strlen(description));
 346         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 347         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 348                 name, relpath);
 349         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 350         fputs("</head>\n<body>\n<table><tr><td>", fp);
 351         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 352                 relpath, relpath);
 353         fputs("</td><td><h1>", fp);
 354         xmlencode(fp, strippedname, strlen(strippedname));
 355         fputs("</h1><span class=\"desc\">", fp);
 356         xmlencode(fp, description, strlen(description));
 357         fputs("</span></td></tr>", fp);
 358         if (cloneurl[0]) {
 359                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 360                 xmlencode(fp, cloneurl, strlen(cloneurl));
 361                 fputs("\">", fp);
 362                 xmlencode(fp, cloneurl, strlen(cloneurl));
 363                 fputs("</a></td></tr>", fp);
 364         }
 365         fputs("<tr><td></td><td>\n", fp);
 366         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 367         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 368         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 369         if (hassubmodules)
 370                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 371         if (hasreadme)
 372                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 373         if (haslicense)
 374                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 375         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 376 }
 377
 378 void
 379 writefooter(FILE *fp)
 380 {
 381         fputs("</div>\n</body>\n</html>\n", fp);
 382 }
 383
 384 int
 385 writeblobhtml(FILE *fp, const git_blob *blob)
 386 {
 387         size_t n = 0, i, prev;
 388         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 389         const char *s = git_blob_rawcontent(blob);
 390         git_off_t len = git_blob_rawsize(blob);
 391
 392         fputs("<pre id=\"blob\">\n", fp);
 393
 394         if (len > 0) {
 395                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 396                         if (s[i] != '\n')
 397                                 continue;
 398                         n++;
 399                         fprintf(fp, nfmt, n, n, n);
 400                         xmlencode(fp, &s[prev], i - prev + 1);
 401                         prev = i + 1;
 402                 }
 403                 /* trailing data */
 404                 if ((len - prev) > 0) {
 405                         n++;
 406                         fprintf(fp, nfmt, n, n, n);
 407                         xmlencode(fp, &s[prev], len - prev);
 408                 }
 409         }
 410
 411         fputs("</pre>\n", fp);
 412
 413         return n;
 414 }
 415
 416 void
 417 printcommit(FILE *fp, struct commitinfo *ci)
 418 {
 419         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 420                 relpath, ci->oid, ci->oid);
 421
 422         if (ci->parentoid[0])
 423                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 424                         relpath, ci->parentoid, ci->parentoid);
 425
 426         if (ci->author) {
 427                 fputs("<b>Author:</b> ", fp);
 428                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 429                 fputs(" &lt;<a href=\"mailto:", fp);
 430                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 431                 fputs("\">", fp);
 432                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 433                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 434                 printtime(fp, &(ci->author->when));
 435                 fputc('\n', fp);
 436         }
 437         if (ci->msg) {
 438                 fputc('\n', fp);
 439                 xmlencode(fp, ci->msg, strlen(ci->msg));
 440                 fputc('\n', fp);
 441         }
 442 }
 443
 444 void
 445 printshowfile(FILE *fp, struct commitinfo *ci)
 446 {
 447         const git_diff_delta *delta;
 448         const git_diff_hunk *hunk;
 449         const git_diff_line *line;
 450         git_patch *patch;
 451         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 452         char linestr[80];
 453
 454         printcommit(fp, ci);
 455
 456         if (!ci->deltas)
 457                 return;
 458
 459         if (ci->filecount > 1000   ||
 460             ci->ndeltas   > 1000   ||
 461             ci->addcount  > 100000 ||
 462             ci->delcount  > 100000) {
 463                 fputs("Diff is too large, output suppressed.\n", fp);
 464                 return;
 465         }
 466
 467         /* diff stat */
 468         fputs("<b>Diffstat:</b>\n<table>", fp);
 469         for (i = 0; i < ci->ndeltas; i++) {
 470                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 471
 472                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 473                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 474                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 475                         fputs(" -&gt; ", fp);
 476                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 477                 }
 478
 479                 add = ci->deltas[i]->addcount;
 480                 del = ci->deltas[i]->delcount;
 481                 changed = add + del;
 482                 total = sizeof(linestr) - 2;
 483                 if (changed > total) {
 484                         if (add)
 485                                 add = ((float)total / changed * add) + 1;
 486                         if (del)
 487                                 del = ((float)total / changed * del) + 1;
 488                 }
 489                 memset(&linestr, '+', add);
 490                 memset(&linestr[add], '-', del);
 491
 492                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 493                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 494                 fwrite(&linestr, 1, add, fp);
 495                 fputs("</span><span class=\"d\">", fp);
 496                 fwrite(&linestr[add], 1, del, fp);
 497                 fputs("</span></td></tr>\n", fp);
 498         }
 499         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 500                 ci->filecount, ci->filecount == 1 ? "" : "s",
 501                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 502                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 503
 504         fputs("<hr/>", fp);
 505
 506         for (i = 0; i < ci->ndeltas; i++) {
 507                 patch = ci->deltas[i]->patch;
 508                 delta = git_patch_get_delta(patch);
 509                 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",
 510                         i, relpath, delta->old_file.path, delta->old_file.path,
 511                         relpath, delta->new_file.path, delta->new_file.path);
 512
 513                 /* check binary data */
 514                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 515                         fputs("Binary files differ.\n", fp);
 516                         continue;
 517                 }
 518
 519                 nhunks = git_patch_num_hunks(patch);
 520                 for (j = 0; j < nhunks; j++) {
 521                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 522                                 break;
 523
 524                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 525                         xmlencode(fp, hunk->header, hunk->header_len);
 526                         fputs("</a>", fp);
 527
 528                         for (k = 0; ; k++) {
 529                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 530                                         break;
 531                                 if (line->old_lineno == -1)
 532                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 533                                                 i, j, k, i, j, k);
 534                                 else if (line->new_lineno == -1)
 535                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 536                                                 i, j, k, i, j, k);
 537                                 else
 538                                         fputc(' ', fp);
 539                                 xmlencode(fp, line->content, line->content_len);
 540                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 541                                         fputs("</a>", fp);
 542                         }
 543                 }
 544         }
 545 }
 546
 547 void
 548 writelogline(FILE *fp, struct commitinfo *ci)
 549 {
 550         fputs("<tr><td>", fp);
 551         if (ci->author)
 552                 printtimeshort(fp, &(ci->author->when));
 553         fputs("</td><td>", fp);
 554         if (ci->summary) {
 555                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 556                 xmlencode(fp, ci->summary, strlen(ci->summary));
 557                 fputs("</a>", fp);
 558         }
 559         fputs("</td><td>", fp);
 560         if (ci->author)
 561                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 562         fputs("</td><td class=\"num\" align=\"right\">", fp);
 563         fprintf(fp, "%zu", ci->filecount);
 564         fputs("</td><td class=\"num\" align=\"right\">", fp);
 565         fprintf(fp, "+%zu", ci->addcount);
 566         fputs("</td><td class=\"num\" align=\"right\">", fp);
 567         fprintf(fp, "-%zu", ci->delcount);
 568         fputs("</td></tr>\n", fp);
 569 }
 570
 571 int
 572 writelog(FILE *fp, const git_oid *oid)
 573 {
 574         struct commitinfo *ci;
 575         git_revwalk *w = NULL;
 576         git_oid id;
 577         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 578         FILE *fpfile;
 579         int r;
 580
 581         git_revwalk_new(&w, repo);
 582         git_revwalk_push(w, oid);
 583         git_revwalk_sorting(w, GIT_SORT_TIME);
 584         git_revwalk_simplify_first_parent(w);
 585
 586         while (!git_revwalk_next(&id, w)) {
 587                 relpath = "";
 588
 589                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 590                         break;
 591
 592                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 593                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 594                 if (r == -1 || (size_t)r >= sizeof(path))
 595                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 596                 r = access(path, F_OK);
 597
 598                 /* optimization: if there are no log lines to write and
 599                    the commit file already exists: skip the diffstat */
 600                 if (!nlogcommits && !r)
 601                         continue;
 602
 603                 if (!(ci = commitinfo_getbyoid(&id)))
 604                         break;
 605                 /* diffstat: for stagit HTML required for the log.html line */
 606                 if (commitinfo_getstats(ci) == -1)
 607                         goto err;
 608
 609                 if (nlogcommits < 0) {
 610                         writelogline(fp, ci);
 611                 } else if (nlogcommits > 0) {
 612                         writelogline(fp, ci);
 613                         nlogcommits--;
 614                         if (!nlogcommits && ci->parentoid[0])
 615                                 fputs("<tr><td></td><td colspan=\"5\">"
 616                                       "More commits remaining [...]</td>"
 617                                       "</tr>\n", fp);
 618                 }
 619
 620                 if (cachefile)
 621                         writelogline(wcachefp, ci);
 622
 623                 /* check if file exists if so skip it */
 624                 if (r) {
 625                         relpath = "../";
 626                         fpfile = efopen(path, "w");
 627                         writeheader(fpfile, ci->summary);
 628                         fputs("<pre>", fpfile);
 629                         printshowfile(fpfile, ci);
 630                         fputs("</pre>\n", fpfile);
 631                         writefooter(fpfile);
 632                         fclose(fpfile);
 633                 }
 634 err:
 635                 commitinfo_free(ci);
 636         }
 637         git_revwalk_free(w);
 638
 639         relpath = "";
 640
 641         return 0;
 642 }
 643
 644 void
 645 printcommitatom(FILE *fp, struct commitinfo *ci)
 646 {
 647         fputs("<entry>\n", fp);
 648
 649         fprintf(fp, "<id>%s</id>\n", ci->oid);
 650         if (ci->author) {
 651                 fputs("<published>", fp);
 652                 printtimez(fp, &(ci->author->when));
 653                 fputs("</published>\n", fp);
 654         }
 655         if (ci->committer) {
 656                 fputs("<updated>", fp);
 657                 printtimez(fp, &(ci->committer->when));
 658                 fputs("</updated>\n", fp);
 659         }
 660         if (ci->summary) {
 661                 fputs("<title type=\"text\">", fp);
 662                 xmlencode(fp, ci->summary, strlen(ci->summary));
 663                 fputs("</title>\n", fp);
 664         }
 665         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 666                 ci->oid);
 667
 668         if (ci->author) {
 669                 fputs("<author><name>", fp);
 670                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 671                 fputs("</name>\n<email>", fp);
 672                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 673                 fputs("</email>\n</author>\n", fp);
 674         }
 675
 676         fputs("<content type=\"text\">", fp);
 677         fprintf(fp, "commit %s\n", ci->oid);
 678         if (ci->parentoid[0])
 679                 fprintf(fp, "parent %s\n", ci->parentoid);
 680         if (ci->author) {
 681                 fputs("Author: ", fp);
 682                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 683                 fputs(" &lt;", fp);
 684                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 685                 fputs("&gt;\nDate:   ", fp);
 686                 printtime(fp, &(ci->author->when));
 687                 fputc('\n', fp);
 688         }
 689         if (ci->msg) {
 690                 fputc('\n', fp);
 691                 xmlencode(fp, ci->msg, strlen(ci->msg));
 692         }
 693         fputs("\n</content>\n</entry>\n", fp);
 694 }
 695
 696 int
 697 writeatom(FILE *fp)
 698 {
 699         struct commitinfo *ci;
 700         git_revwalk *w = NULL;
 701         git_oid id;
 702         size_t i, m = 100; /* last 'm' commits */
 703
 704         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 705               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 706         xmlencode(fp, strippedname, strlen(strippedname));
 707         fputs(", branch HEAD</title>\n<subtitle>", fp);
 708         xmlencode(fp, description, strlen(description));
 709         fputs("</subtitle>\n", fp);
 710
 711         git_revwalk_new(&w, repo);
 712         git_revwalk_push_head(w);
 713         git_revwalk_sorting(w, GIT_SORT_TIME);
 714         git_revwalk_simplify_first_parent(w);
 715
 716         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 717                 if (!(ci = commitinfo_getbyoid(&id)))
 718                         break;
 719                 printcommitatom(fp, ci);
 720                 commitinfo_free(ci);
 721         }
 722         git_revwalk_free(w);
 723
 724         fputs("</feed>\n", fp);
 725
 726         return 0;
 727 }
 728
 729 int
 730 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 731 {
 732         char tmp[PATH_MAX] = "", *d;
 733         const char *p;
 734         int lc = 0;
 735         FILE *fp;
 736
 737         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 738                 errx(1, "path truncated: '%s'", fpath);
 739         if (!(d = dirname(tmp)))
 740                 err(1, "dirname");
 741         if (mkdirp(d))
 742                 return -1;
 743
 744         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 745                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 746                         errx(1, "path truncated: '../%s'", tmp);
 747         }
 748         relpath = tmp;
 749
 750         fp = efopen(fpath, "w");
 751         writeheader(fp, filename);
 752         fputs("<p> ", fp);
 753         xmlencode(fp, filename, strlen(filename));
 754         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 755         fputs("</p><hr/>", fp);
 756
 757         if (git_blob_is_binary((git_blob *)obj)) {
 758                 fputs("<p>Binary file.</p>\n", fp);
 759         } else {
 760                 lc = writeblobhtml(fp, (git_blob *)obj);
 761                 if (ferror(fp))
 762                         err(1, "fwrite");
 763         }
 764         writefooter(fp);
 765         fclose(fp);
 766
 767         relpath = "";
 768
 769         return lc;
 770 }
 771
 772 const char *
 773 filemode(git_filemode_t m)
 774 {
 775         static char mode[11];
 776
 777         memset(mode, '-', sizeof(mode) - 1);
 778         mode[10] = '\0';
 779
 780         if (S_ISREG(m))
 781                 mode[0] = '-';
 782         else if (S_ISBLK(m))
 783                 mode[0] = 'b';
 784         else if (S_ISCHR(m))
 785                 mode[0] = 'c';
 786         else if (S_ISDIR(m))
 787                 mode[0] = 'd';
 788         else if (S_ISFIFO(m))
 789                 mode[0] = 'p';
 790         else if (S_ISLNK(m))
 791                 mode[0] = 'l';
 792         else if (S_ISSOCK(m))
 793                 mode[0] = 's';
 794         else
 795                 mode[0] = '?';
 796
 797         if (m & S_IRUSR) mode[1] = 'r';
 798         if (m & S_IWUSR) mode[2] = 'w';
 799         if (m & S_IXUSR) mode[3] = 'x';
 800         if (m & S_IRGRP) mode[4] = 'r';
 801         if (m & S_IWGRP) mode[5] = 'w';
 802         if (m & S_IXGRP) mode[6] = 'x';
 803         if (m & S_IROTH) mode[7] = 'r';
 804         if (m & S_IWOTH) mode[8] = 'w';
 805         if (m & S_IXOTH) mode[9] = 'x';
 806
 807         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 808         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 809         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 810
 811         return mode;
 812 }
 813
 814 int
 815 writefilestree(FILE *fp, git_tree *tree, const char *path)
 816 {
 817         const git_tree_entry *entry = NULL;
 818         git_submodule *module = NULL;
 819         git_object *obj = NULL;
 820         git_off_t filesize;
 821         const char *entryname;
 822         char filepath[PATH_MAX], entrypath[PATH_MAX];
 823         size_t count, i;
 824         int lc, r, ret;
 825
 826         count = git_tree_entrycount(tree);
 827         for (i = 0; i < count; i++) {
 828                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 829                     !(entryname = git_tree_entry_name(entry)))
 830                         return -1;
 831                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 832
 833                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 834                          entrypath);
 835                 if (r == -1 || (size_t)r >= sizeof(filepath))
 836                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 837
 838                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 839                         switch (git_object_type(obj)) {
 840                         case GIT_OBJ_BLOB:
 841                                 break;
 842                         case GIT_OBJ_TREE:
 843                                 /* NOTE: recurses */
 844                                 ret = writefilestree(fp, (git_tree *)obj,
 845                                                      entrypath);
 846                                 git_object_free(obj);
 847                                 if (ret)
 848                                         return ret;
 849                                 continue;
 850                         default:
 851                                 git_object_free(obj);
 852                                 continue;
 853                         }
 854
 855                         filesize = git_blob_rawsize((git_blob *)obj);
 856                         lc = writeblob(obj, filepath, entryname, filesize);
 857
 858                         fputs("<tr><td>", fp);
 859                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 860                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 861                         xmlencode(fp, entrypath, strlen(entrypath));
 862                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 863                         if (lc > 0)
 864                                 fprintf(fp, "%dL", lc);
 865                         else
 866                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 867                         fputs("</td></tr>\n", fp);
 868                         git_object_free(obj);
 869                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 870                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 871                                 relpath);
 872                         xmlencode(fp, entrypath, strlen(entrypath));
 873                         git_submodule_free(module);
 874                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 875                 }
 876         }
 877
 878         return 0;
 879 }
 880
 881 int
 882 writefiles(FILE *fp, const git_oid *id)
 883 {
 884         git_tree *tree = NULL;
 885         git_commit *commit = NULL;
 886         int ret = -1;
 887
 888         fputs("<table id=\"files\"><thead>\n<tr>"
 889               "<td><b>Mode</b></td><td><b>Name</b></td>"
 890               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 891               "</tr>\n</thead><tbody>\n", fp);
 892
 893         if (!git_commit_lookup(&commit, repo, id) &&
 894             !git_commit_tree(&tree, commit))
 895                 ret = writefilestree(fp, tree, "");
 896
 897         fputs("</tbody></table>", fp);
 898
 899         git_commit_free(commit);
 900         git_tree_free(tree);
 901
 902         return ret;
 903 }
 904
 905 int
 906 refs_cmp(const void *v1, const void *v2)
 907 {
 908         git_reference *r1 = (*(git_reference **)v1);
 909         git_reference *r2 = (*(git_reference **)v2);
 910         int r;
 911
 912         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 913                 return r;
 914
 915         return strcmp(git_reference_shorthand(r1),
 916                       git_reference_shorthand(r2));
 917 }
 918
 919 int
 920 writerefs(FILE *fp)
 921 {
 922         struct commitinfo *ci;
 923         const git_oid *id = NULL;
 924         git_object *obj = NULL;
 925         git_reference *dref = NULL, *r, *ref = NULL;
 926         git_reference_iterator *it = NULL;
 927         git_reference **refs = NULL;
 928         size_t count, i, j, refcount;
 929         const char *titles[] = { "Branches", "Tags" };
 930         const char *ids[] = { "branches", "tags" };
 931         const char *name;
 932
 933         if (git_reference_iterator_new(&it, repo))
 934                 return -1;
 935
 936         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 937                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 938                         err(1, "realloc");
 939                 refs[refcount] = ref;
 940         }
 941         git_reference_iterator_free(it);
 942
 943         /* sort by type then shorthand name */
 944         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 945
 946         for (j = 0; j < 2; j++) {
 947                 for (i = 0, count = 0; i < refcount; i++) {
 948                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 949                             !(git_reference_is_tag(refs[i]) && j == 1))
 950                                 continue;
 951
 952                         switch (git_reference_type(refs[i])) {
 953                         case GIT_REF_SYMBOLIC:
 954                                 if (git_reference_resolve(&dref, refs[i]))
 955                                         goto err;
 956                                 r = dref;
 957                                 break;
 958                         case GIT_REF_OID:
 959                                 r = refs[i];
 960                                 break;
 961                         default:
 962                                 continue;
 963                         }
 964                         if (!git_reference_target(r) ||
 965                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 966                                 goto err;
 967                         if (!(id = git_object_id(obj)))
 968                                 goto err;
 969                         if (!(ci = commitinfo_getbyoid(id)))
 970                                 break;
 971
 972                         /* print header if it has an entry (first). */
 973                         if (++count == 1) {
 974                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 975                                         "<thead>\n<tr><td><b>Name</b></td>"
 976                                         "<td><b>Last commit date</b></td>"
 977                                         "<td><b>Author</b></td>\n</tr>\n"
 978                                         "</thead><tbody>\n",
 979                                          titles[j], ids[j]);
 980                         }
 981
 982                         relpath = "";
 983                         name = git_reference_shorthand(r);
 984
 985                         fputs("<tr><td>", fp);
 986                         xmlencode(fp, name, strlen(name));
 987                         fputs("</td><td>", fp);
 988                         if (ci->author)
 989                                 printtimeshort(fp, &(ci->author->when));
 990                         fputs("</td><td>", fp);
 991                         if (ci->author)
 992                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 993                         fputs("</td></tr>\n", fp);
 994
 995                         relpath = "../";
 996
 997                         commitinfo_free(ci);
 998                         git_object_free(obj);
 999                         obj = NULL;
1000                         git_reference_free(dref);
1001                         dref = NULL;
1002                 }
1003                 /* table footer */
1004                 if (count)
1005                         fputs("</tbody></table><br/>", fp);
1006         }
1007
1008 err:
1009         git_object_free(obj);
1010         git_reference_free(dref);
1011
1012         for (i = 0; i < refcount; i++)
1013                 git_reference_free(refs[i]);
1014         free(refs);
1015
1016         return 0;
1017 }
1018
1019 void
1020 usage(char *argv0)
1021 {
1022         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1023         exit(1);
1024 }
1025
1026 int
1027 main(int argc, char *argv[])
1028 {
1029         git_object *obj = NULL;
1030         const git_oid *head = NULL;
1031         const git_error *e = NULL;
1032         mode_t mask;
1033         FILE *fp, *fpread;
1034         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1035         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1036         size_t n;
1037         int i, fd;
1038
1039         for (i = 1; i < argc; i++) {
1040                 if (argv[i][0] != '-') {
1041                         if (repodir)
1042                                 usage(argv[0]);
1043                         repodir = argv[i];
1044                 } else if (argv[i][1] == 'c') {
1045                         if (nlogcommits > 0 || i + 1 >= argc)
1046                                 usage(argv[0]);
1047                         cachefile = argv[++i];
1048                 } else if (argv[i][1] == 'l') {
1049                         if (cachefile || i + 1 >= argc)
1050                                 usage(argv[0]);
1051                         errno = 0;
1052                         nlogcommits = strtoll(argv[++i], &p, 10);
1053                         if (argv[i][0] == '\0' || *p != '\0' ||
1054                             nlogcommits <= 0 || errno)
1055                                 usage(argv[0]);
1056                 }
1057         }
1058         if (!repodir)
1059                 usage(argv[0]);
1060
1061         if (!realpath(repodir, repodirabs))
1062                 err(1, "realpath");
1063
1064         git_libgit2_init();
1065
1066 #ifdef __OpenBSD__
1067         if (cachefile) {
1068                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1069                         err(1, "pledge");
1070         } else {
1071                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1072                         err(1, "pledge");
1073         }
1074 #endif
1075
1076         if (git_repository_open_ext(&repo, repodir,
1077                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1078                 e = giterr_last();
1079                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1080                 return 1;
1081         }
1082
1083         /* find HEAD */
1084         if (!git_revparse_single(&obj, repo, "HEAD"))
1085                 head = git_object_id(obj);
1086         git_object_free(obj);
1087
1088         /* use directory name as name */
1089         if ((name = strrchr(repodirabs, '/')))
1090                 name++;
1091         else
1092                 name = "";
1093
1094         /* strip .git suffix */
1095         if (!(strippedname = strdup(name)))
1096                 err(1, "strdup");
1097         if ((p = strrchr(strippedname, '.')))
1098                 if (!strcmp(p, ".git"))
1099                         *p = '\0';
1100
1101         /* read description or .git/description */
1102         joinpath(path, sizeof(path), repodir, "description");
1103         if (!(fpread = fopen(path, "r"))) {
1104                 joinpath(path, sizeof(path), repodir, ".git/description");
1105                 fpread = fopen(path, "r");
1106         }
1107         if (fpread) {
1108                 if (!fgets(description, sizeof(description), fpread))
1109                         description[0] = '\0';
1110                 fclose(fpread);
1111         }
1112
1113         /* read url or .git/url */
1114         joinpath(path, sizeof(path), repodir, "url");
1115         if (!(fpread = fopen(path, "r"))) {
1116                 joinpath(path, sizeof(path), repodir, ".git/url");
1117                 fpread = fopen(path, "r");
1118         }
1119         if (fpread) {
1120                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1121                         cloneurl[0] = '\0';
1122                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1123                 fclose(fpread);
1124         }
1125
1126         /* check LICENSE */
1127         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1128                 git_object_type(obj) == GIT_OBJ_BLOB);
1129         git_object_free(obj);
1130
1131         /* check README */
1132         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1133                 git_object_type(obj) == GIT_OBJ_BLOB);
1134         git_object_free(obj);
1135
1136         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1137                 git_object_type(obj) == GIT_OBJ_BLOB);
1138         git_object_free(obj);
1139
1140         /* log for HEAD */
1141         fp = efopen("log.html", "w");
1142         relpath = "";
1143         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1144         writeheader(fp, "Log");
1145         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1146               "<td><b>Commit message</b></td>"
1147               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1148               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1149               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1150
1151         if (cachefile && head) {
1152                 /* read from cache file (does not need to exist) */
1153                 if ((rcachefp = fopen(cachefile, "r"))) {
1154                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1155                                 errx(1, "%s: no object id", cachefile);
1156                         if (git_oid_fromstr(&lastoid, lastoidstr))
1157                                 errx(1, "%s: invalid object id", cachefile);
1158                 }
1159
1160                 /* write log to (temporary) cache */
1161                 if ((fd = mkstemp(tmppath)) == -1)
1162                         err(1, "mkstemp");
1163                 if (!(wcachefp = fdopen(fd, "w")))
1164                         err(1, "fdopen: '%s'", tmppath);
1165                 /* write last commit id (HEAD) */
1166                 git_oid_tostr(buf, sizeof(buf), head);
1167                 fprintf(wcachefp, "%s\n", buf);
1168
1169                 writelog(fp, head);
1170
1171                 if (rcachefp) {
1172                         /* append previous log to log.html and the new cache */
1173                         while (!feof(rcachefp)) {
1174                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1175                                 if (ferror(rcachefp))
1176                                         err(1, "fread");
1177                                 if (fwrite(buf, 1, n, fp) != n ||
1178                                     fwrite(buf, 1, n, wcachefp) != n)
1179                                         err(1, "fwrite");
1180                         }
1181                         fclose(rcachefp);
1182                 }
1183                 fclose(wcachefp);
1184         } else {
1185                 if (head)
1186                         writelog(fp, head);
1187         }
1188
1189         fputs("</tbody></table>", fp);
1190         writefooter(fp);
1191         fclose(fp);
1192
1193         /* files for HEAD */
1194         fp = efopen("files.html", "w");
1195         writeheader(fp, "Files");
1196         if (head)
1197                 writefiles(fp, head);
1198         writefooter(fp);
1199         fclose(fp);
1200
1201         /* summary page with branches and tags */
1202         fp = efopen("refs.html", "w");
1203         writeheader(fp, "Refs");
1204         writerefs(fp);
1205         writefooter(fp);
1206         fclose(fp);
1207
1208         /* Atom feed */
1209         fp = efopen("atom.xml", "w");
1210         writeatom(fp);
1211         fclose(fp);
1212
1213         /* rename new cache file on success */
1214         if (cachefile && head) {
1215                 if (rename(tmppath, cachefile))
1216                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1217                 umask((mask = umask(0)));
1218                 if (chmod(cachefile,
1219                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1220                         err(1, "chmod: '%s'", cachefile);
1221         }
1222
1223         /* cleanup */
1224         git_repository_free(repo);
1225         git_libgit2_shutdown();
1226
1227         return 0;
1228 }