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 char *submodules;
  60 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
  61 static char *license;
  62 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
  63 static char *readme;
  64 static long long nlogcommits = -1; /* < 0 indicates not used */
  65
  66 /* cache */
  67 static git_oid lastoid;
  68 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  69 static FILE *rcachefp, *wcachefp;
  70 static const char *cachefile;
  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         memset(di, 0, sizeof(*di));
  91         free(di);
  92 }
  93
  94 int
  95 commitinfo_getstats(struct commitinfo *ci)
  96 {
  97         struct deltainfo *di;
  98         git_diff_options opts;
  99         git_diff_find_options fopts;
 100         const git_diff_delta *delta;
 101         const git_diff_hunk *hunk;
 102         const git_diff_line *line;
 103         git_patch *patch = NULL;
 104         size_t ndeltas, nhunks, nhunklines;
 105         size_t i, j, k;
 106
 107         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 108                 goto err;
 109         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 110                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 111                         ci->parent = NULL;
 112                         ci->parent_tree = NULL;
 113                 }
 114         }
 115
 116         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 117         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 118                       GIT_DIFF_IGNORE_SUBMODULES |
 119                       GIT_DIFF_INCLUDE_TYPECHANGE;
 120         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 121                 goto err;
 122
 123         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 124                 goto err;
 125         /* find renames and copies, exact matches (no heuristic) for renames. */
 126         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
 127                        GIT_DIFF_FIND_EXACT_MATCH_ONLY;
 128         if (git_diff_find_similar(ci->diff, &fopts))
 129                 goto err;
 130
 131         ndeltas = git_diff_num_deltas(ci->diff);
 132         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 133                 err(1, "calloc");
 134
 135         for (i = 0; i < ndeltas; i++) {
 136                 if (git_patch_from_diff(&patch, ci->diff, i))
 137                         goto err;
 138
 139                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 140                         err(1, "calloc");
 141                 di->patch = patch;
 142                 ci->deltas[i] = di;
 143
 144                 delta = git_patch_get_delta(patch);
 145
 146                 /* skip stats for binary data */
 147                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 148                         continue;
 149
 150                 nhunks = git_patch_num_hunks(patch);
 151                 for (j = 0; j < nhunks; j++) {
 152                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 153                                 break;
 154                         for (k = 0; ; k++) {
 155                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 156                                         break;
 157                                 if (line->old_lineno == -1) {
 158                                         di->addcount++;
 159                                         ci->addcount++;
 160                                 } else if (line->new_lineno == -1) {
 161                                         di->delcount++;
 162                                         ci->delcount++;
 163                                 }
 164                         }
 165                 }
 166         }
 167         ci->ndeltas = i;
 168         ci->filecount = i;
 169
 170         return 0;
 171
 172 err:
 173         git_diff_free(ci->diff);
 174         ci->diff = NULL;
 175         git_tree_free(ci->commit_tree);
 176         ci->commit_tree = NULL;
 177         git_tree_free(ci->parent_tree);
 178         ci->parent_tree = NULL;
 179         git_commit_free(ci->parent);
 180         ci->parent = NULL;
 181
 182         if (ci->deltas)
 183                 for (i = 0; i < ci->ndeltas; i++)
 184                         deltainfo_free(ci->deltas[i]);
 185         free(ci->deltas);
 186         ci->deltas = NULL;
 187         ci->ndeltas = 0;
 188         ci->addcount = 0;
 189         ci->delcount = 0;
 190         ci->filecount = 0;
 191
 192         return -1;
 193 }
 194
 195 void
 196 commitinfo_free(struct commitinfo *ci)
 197 {
 198         size_t i;
 199
 200         if (!ci)
 201                 return;
 202         if (ci->deltas)
 203                 for (i = 0; i < ci->ndeltas; i++)
 204                         deltainfo_free(ci->deltas[i]);
 205
 206         free(ci->deltas);
 207         git_diff_free(ci->diff);
 208         git_tree_free(ci->commit_tree);
 209         git_tree_free(ci->parent_tree);
 210         git_commit_free(ci->commit);
 211         git_commit_free(ci->parent);
 212         memset(ci, 0, sizeof(*ci));
 213         free(ci);
 214 }
 215
 216 struct commitinfo *
 217 commitinfo_getbyoid(const git_oid *id)
 218 {
 219         struct commitinfo *ci;
 220
 221         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 222                 err(1, "calloc");
 223
 224         if (git_commit_lookup(&(ci->commit), repo, id))
 225                 goto err;
 226         ci->id = id;
 227
 228         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 229         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 230
 231         ci->author = git_commit_author(ci->commit);
 232         ci->committer = git_commit_committer(ci->commit);
 233         ci->summary = git_commit_summary(ci->commit);
 234         ci->msg = git_commit_message(ci->commit);
 235
 236         return ci;
 237
 238 err:
 239         commitinfo_free(ci);
 240
 241         return NULL;
 242 }
 243
 244 FILE *
 245 efopen(const char *name, const char *flags)
 246 {
 247         FILE *fp;
 248
 249         if (!(fp = fopen(name, flags)))
 250                 err(1, "fopen: '%s'", name);
 251
 252         return fp;
 253 }
 254
 255 /* Escape characters below as HTML 2.0 / XML 1.0. */
 256 void
 257 xmlencode(FILE *fp, const char *s, size_t len)
 258 {
 259         size_t i;
 260
 261         for (i = 0; *s && i < len; s++, i++) {
 262                 switch(*s) {
 263                 case '<':  fputs("&lt;",   fp); break;
 264                 case '>':  fputs("&gt;",   fp); break;
 265                 case '\'': fputs("&#39;",  fp); break;
 266                 case '&':  fputs("&amp;",  fp); break;
 267                 case '"':  fputs("&quot;", fp); break;
 268                 default:   fputc(*s, fp);
 269                 }
 270         }
 271 }
 272
 273 int
 274 mkdirp(const char *path)
 275 {
 276         char tmp[PATH_MAX], *p;
 277
 278         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 279                 errx(1, "path truncated: '%s'", path);
 280         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 281                 if (*p != '/')
 282                         continue;
 283                 *p = '\0';
 284                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 285                         return -1;
 286                 *p = '/';
 287         }
 288         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 289                 return -1;
 290         return 0;
 291 }
 292
 293 void
 294 printtimez(FILE *fp, const git_time *intime)
 295 {
 296         struct tm *intm;
 297         time_t t;
 298         char out[32];
 299
 300         t = (time_t)intime->time;
 301         if (!(intm = gmtime(&t)))
 302                 return;
 303         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 304         fputs(out, fp);
 305 }
 306
 307 void
 308 printtime(FILE *fp, const git_time *intime)
 309 {
 310         struct tm *intm;
 311         time_t t;
 312         char out[32];
 313
 314         t = (time_t)intime->time + (intime->offset * 60);
 315         if (!(intm = gmtime(&t)))
 316                 return;
 317         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 318         if (intime->offset < 0)
 319                 fprintf(fp, "%s -%02d%02d", out,
 320                             -(intime->offset) / 60, -(intime->offset) % 60);
 321         else
 322                 fprintf(fp, "%s +%02d%02d", out,
 323                             intime->offset / 60, intime->offset % 60);
 324 }
 325
 326 void
 327 printtimeshort(FILE *fp, const git_time *intime)
 328 {
 329         struct tm *intm;
 330         time_t t;
 331         char out[32];
 332
 333         t = (time_t)intime->time;
 334         if (!(intm = gmtime(&t)))
 335                 return;
 336         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 337         fputs(out, fp);
 338 }
 339
 340 void
 341 writeheader(FILE *fp, const char *title)
 342 {
 343         fputs("<!DOCTYPE html>\n"
 344                 "<html>\n<head>\n"
 345                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 346                 "<title>", fp);
 347         xmlencode(fp, title, strlen(title));
 348         if (title[0] && strippedname[0])
 349                 fputs(" - ", fp);
 350         xmlencode(fp, strippedname, strlen(strippedname));
 351         if (description[0])
 352                 fputs(" - ", fp);
 353         xmlencode(fp, description, strlen(description));
 354         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 355         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 356                 name, relpath);
 357         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 358         fputs("</head>\n<body>\n<table><tr><td>", fp);
 359         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 360                 relpath, relpath);
 361         fputs("</td><td><h1>", fp);
 362         xmlencode(fp, strippedname, strlen(strippedname));
 363         fputs("</h1><span class=\"desc\">", fp);
 364         xmlencode(fp, description, strlen(description));
 365         fputs("</span></td></tr>", fp);
 366         if (cloneurl[0]) {
 367                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 368                 xmlencode(fp, cloneurl, strlen(cloneurl));
 369                 fputs("\">", fp);
 370                 xmlencode(fp, cloneurl, strlen(cloneurl));
 371                 fputs("</a></td></tr>", fp);
 372         }
 373         fputs("<tr><td></td><td>\n", fp);
 374         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 375         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 376         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 377         if (submodules)
 378                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 379                         relpath, submodules);
 380         if (readme)
 381                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 382                         relpath, readme);
 383         if (license)
 384                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 385                         relpath, license);
 386         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 387 }
 388
 389 void
 390 writefooter(FILE *fp)
 391 {
 392         fputs("</div>\n</body>\n</html>\n", fp);
 393 }
 394
 395 int
 396 writeblobhtml(FILE *fp, const git_blob *blob)
 397 {
 398         size_t n = 0, i, prev;
 399         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 400         const char *s = git_blob_rawcontent(blob);
 401         git_off_t len = git_blob_rawsize(blob);
 402
 403         fputs("<pre id=\"blob\">\n", fp);
 404
 405         if (len > 0) {
 406                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 407                         if (s[i] != '\n')
 408                                 continue;
 409                         n++;
 410                         fprintf(fp, nfmt, n, n, n);
 411                         xmlencode(fp, &s[prev], i - prev + 1);
 412                         prev = i + 1;
 413                 }
 414                 /* trailing data */
 415                 if ((len - prev) > 0) {
 416                         n++;
 417                         fprintf(fp, nfmt, n, n, n);
 418                         xmlencode(fp, &s[prev], len - prev);
 419                 }
 420         }
 421
 422         fputs("</pre>\n", fp);
 423
 424         return n;
 425 }
 426
 427 void
 428 printcommit(FILE *fp, struct commitinfo *ci)
 429 {
 430         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 431                 relpath, ci->oid, ci->oid);
 432
 433         if (ci->parentoid[0])
 434                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 435                         relpath, ci->parentoid, ci->parentoid);
 436
 437         if (ci->author) {
 438                 fputs("<b>Author:</b> ", fp);
 439                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 440                 fputs(" &lt;<a href=\"mailto:", fp);
 441                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 442                 fputs("\">", fp);
 443                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 444                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 445                 printtime(fp, &(ci->author->when));
 446                 fputc('\n', fp);
 447         }
 448         if (ci->msg) {
 449                 fputc('\n', fp);
 450                 xmlencode(fp, ci->msg, strlen(ci->msg));
 451                 fputc('\n', fp);
 452         }
 453 }
 454
 455 void
 456 printshowfile(FILE *fp, struct commitinfo *ci)
 457 {
 458         const git_diff_delta *delta;
 459         const git_diff_hunk *hunk;
 460         const git_diff_line *line;
 461         git_patch *patch;
 462         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 463         char linestr[80];
 464
 465         printcommit(fp, ci);
 466
 467         if (!ci->deltas)
 468                 return;
 469
 470         if (ci->filecount > 1000   ||
 471             ci->ndeltas   > 1000   ||
 472             ci->addcount  > 100000 ||
 473             ci->delcount  > 100000) {
 474                 fputs("Diff is too large, output suppressed.\n", fp);
 475                 return;
 476         }
 477
 478         /* diff stat */
 479         fputs("<b>Diffstat:</b>\n<table>", fp);
 480         for (i = 0; i < ci->ndeltas; i++) {
 481                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 482
 483                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 484                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 485                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 486                         fputs(" -&gt; ", fp);
 487                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 488                 }
 489
 490                 add = ci->deltas[i]->addcount;
 491                 del = ci->deltas[i]->delcount;
 492                 changed = add + del;
 493                 total = sizeof(linestr) - 2;
 494                 if (changed > total) {
 495                         if (add)
 496                                 add = ((float)total / changed * add) + 1;
 497                         if (del)
 498                                 del = ((float)total / changed * del) + 1;
 499                 }
 500                 memset(&linestr, '+', add);
 501                 memset(&linestr[add], '-', del);
 502
 503                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 504                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 505                 fwrite(&linestr, 1, add, fp);
 506                 fputs("</span><span class=\"d\">", fp);
 507                 fwrite(&linestr[add], 1, del, fp);
 508                 fputs("</span></td></tr>\n", fp);
 509         }
 510         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 511                 ci->filecount, ci->filecount == 1 ? "" : "s",
 512                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 513                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 514
 515         fputs("<hr/>", fp);
 516
 517         for (i = 0; i < ci->ndeltas; i++) {
 518                 patch = ci->deltas[i]->patch;
 519                 delta = git_patch_get_delta(patch);
 520                 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",
 521                         i, relpath, delta->old_file.path, delta->old_file.path,
 522                         relpath, delta->new_file.path, delta->new_file.path);
 523
 524                 /* check binary data */
 525                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 526                         fputs("Binary files differ.\n", fp);
 527                         continue;
 528                 }
 529
 530                 nhunks = git_patch_num_hunks(patch);
 531                 for (j = 0; j < nhunks; j++) {
 532                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 533                                 break;
 534
 535                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 536                         xmlencode(fp, hunk->header, hunk->header_len);
 537                         fputs("</a>", fp);
 538
 539                         for (k = 0; ; k++) {
 540                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 541                                         break;
 542                                 if (line->old_lineno == -1)
 543                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 544                                                 i, j, k, i, j, k);
 545                                 else if (line->new_lineno == -1)
 546                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 547                                                 i, j, k, i, j, k);
 548                                 else
 549                                         fputc(' ', fp);
 550                                 xmlencode(fp, line->content, line->content_len);
 551                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 552                                         fputs("</a>", fp);
 553                         }
 554                 }
 555         }
 556 }
 557
 558 void
 559 writelogline(FILE *fp, struct commitinfo *ci)
 560 {
 561         fputs("<tr><td>", fp);
 562         if (ci->author)
 563                 printtimeshort(fp, &(ci->author->when));
 564         fputs("</td><td>", fp);
 565         if (ci->summary) {
 566                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 567                 xmlencode(fp, ci->summary, strlen(ci->summary));
 568                 fputs("</a>", fp);
 569         }
 570         fputs("</td><td>", fp);
 571         if (ci->author)
 572                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 573         fputs("</td><td class=\"num\" align=\"right\">", fp);
 574         fprintf(fp, "%zu", ci->filecount);
 575         fputs("</td><td class=\"num\" align=\"right\">", fp);
 576         fprintf(fp, "+%zu", ci->addcount);
 577         fputs("</td><td class=\"num\" align=\"right\">", fp);
 578         fprintf(fp, "-%zu", ci->delcount);
 579         fputs("</td></tr>\n", fp);
 580 }
 581
 582 int
 583 writelog(FILE *fp, const git_oid *oid)
 584 {
 585         struct commitinfo *ci;
 586         git_revwalk *w = NULL;
 587         git_oid id;
 588         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 589         FILE *fpfile;
 590         int r;
 591
 592         git_revwalk_new(&w, repo);
 593         git_revwalk_push(w, oid);
 594         git_revwalk_sorting(w, GIT_SORT_TIME);
 595         git_revwalk_simplify_first_parent(w);
 596
 597         while (!git_revwalk_next(&id, w)) {
 598                 relpath = "";
 599
 600                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 601                         break;
 602
 603                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 604                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 605                 if (r == -1 || (size_t)r >= sizeof(path))
 606                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 607                 r = access(path, F_OK);
 608
 609                 /* optimization: if there are no log lines to write and
 610                    the commit file already exists: skip the diffstat */
 611                 if (!nlogcommits && !r)
 612                         continue;
 613
 614                 if (!(ci = commitinfo_getbyoid(&id)))
 615                         break;
 616                 /* diffstat: for stagit HTML required for the log.html line */
 617                 if (commitinfo_getstats(ci) == -1)
 618                         goto err;
 619
 620                 if (nlogcommits < 0) {
 621                         writelogline(fp, ci);
 622                 } else if (nlogcommits > 0) {
 623                         writelogline(fp, ci);
 624                         nlogcommits--;
 625                         if (!nlogcommits && ci->parentoid[0])
 626                                 fputs("<tr><td></td><td colspan=\"5\">"
 627                                       "More commits remaining [...]</td>"
 628                                       "</tr>\n", fp);
 629                 }
 630
 631                 if (cachefile)
 632                         writelogline(wcachefp, ci);
 633
 634                 /* check if file exists if so skip it */
 635                 if (r) {
 636                         relpath = "../";
 637                         fpfile = efopen(path, "w");
 638                         writeheader(fpfile, ci->summary);
 639                         fputs("<pre>", fpfile);
 640                         printshowfile(fpfile, ci);
 641                         fputs("</pre>\n", fpfile);
 642                         writefooter(fpfile);
 643                         fclose(fpfile);
 644                 }
 645 err:
 646                 commitinfo_free(ci);
 647         }
 648         git_revwalk_free(w);
 649
 650         relpath = "";
 651
 652         return 0;
 653 }
 654
 655 void
 656 printcommitatom(FILE *fp, struct commitinfo *ci)
 657 {
 658         fputs("<entry>\n", fp);
 659
 660         fprintf(fp, "<id>%s</id>\n", ci->oid);
 661         if (ci->author) {
 662                 fputs("<published>", fp);
 663                 printtimez(fp, &(ci->author->when));
 664                 fputs("</published>\n", fp);
 665         }
 666         if (ci->committer) {
 667                 fputs("<updated>", fp);
 668                 printtimez(fp, &(ci->committer->when));
 669                 fputs("</updated>\n", fp);
 670         }
 671         if (ci->summary) {
 672                 fputs("<title type=\"text\">", fp);
 673                 xmlencode(fp, ci->summary, strlen(ci->summary));
 674                 fputs("</title>\n", fp);
 675         }
 676         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 677                 ci->oid);
 678
 679         if (ci->author) {
 680                 fputs("<author><name>", fp);
 681                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 682                 fputs("</name>\n<email>", fp);
 683                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 684                 fputs("</email>\n</author>\n", fp);
 685         }
 686
 687         fputs("<content type=\"text\">", fp);
 688         fprintf(fp, "commit %s\n", ci->oid);
 689         if (ci->parentoid[0])
 690                 fprintf(fp, "parent %s\n", ci->parentoid);
 691         if (ci->author) {
 692                 fputs("Author: ", fp);
 693                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 694                 fputs(" &lt;", fp);
 695                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 696                 fputs("&gt;\nDate:   ", fp);
 697                 printtime(fp, &(ci->author->when));
 698                 fputc('\n', fp);
 699         }
 700         if (ci->msg) {
 701                 fputc('\n', fp);
 702                 xmlencode(fp, ci->msg, strlen(ci->msg));
 703         }
 704         fputs("\n</content>\n</entry>\n", fp);
 705 }
 706
 707 int
 708 writeatom(FILE *fp)
 709 {
 710         struct commitinfo *ci;
 711         git_revwalk *w = NULL;
 712         git_oid id;
 713         size_t i, m = 100; /* last 'm' commits */
 714
 715         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 716               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 717         xmlencode(fp, strippedname, strlen(strippedname));
 718         fputs(", branch HEAD</title>\n<subtitle>", fp);
 719         xmlencode(fp, description, strlen(description));
 720         fputs("</subtitle>\n", fp);
 721
 722         git_revwalk_new(&w, repo);
 723         git_revwalk_push_head(w);
 724         git_revwalk_sorting(w, GIT_SORT_TIME);
 725         git_revwalk_simplify_first_parent(w);
 726
 727         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 728                 if (!(ci = commitinfo_getbyoid(&id)))
 729                         break;
 730                 printcommitatom(fp, ci);
 731                 commitinfo_free(ci);
 732         }
 733         git_revwalk_free(w);
 734
 735         fputs("</feed>\n", fp);
 736
 737         return 0;
 738 }
 739
 740 int
 741 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 742 {
 743         char tmp[PATH_MAX] = "", *d;
 744         const char *p;
 745         int lc = 0;
 746         FILE *fp;
 747
 748         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 749                 errx(1, "path truncated: '%s'", fpath);
 750         if (!(d = dirname(tmp)))
 751                 err(1, "dirname");
 752         if (mkdirp(d))
 753                 return -1;
 754
 755         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 756                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 757                         errx(1, "path truncated: '../%s'", tmp);
 758         }
 759         relpath = tmp;
 760
 761         fp = efopen(fpath, "w");
 762         writeheader(fp, filename);
 763         fputs("<p> ", fp);
 764         xmlencode(fp, filename, strlen(filename));
 765         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 766         fputs("</p><hr/>", fp);
 767
 768         if (git_blob_is_binary((git_blob *)obj)) {
 769                 fputs("<p>Binary file.</p>\n", fp);
 770         } else {
 771                 lc = writeblobhtml(fp, (git_blob *)obj);
 772                 if (ferror(fp))
 773                         err(1, "fwrite");
 774         }
 775         writefooter(fp);
 776         fclose(fp);
 777
 778         relpath = "";
 779
 780         return lc;
 781 }
 782
 783 const char *
 784 filemode(git_filemode_t m)
 785 {
 786         static char mode[11];
 787
 788         memset(mode, '-', sizeof(mode) - 1);
 789         mode[10] = '\0';
 790
 791         if (S_ISREG(m))
 792                 mode[0] = '-';
 793         else if (S_ISBLK(m))
 794                 mode[0] = 'b';
 795         else if (S_ISCHR(m))
 796                 mode[0] = 'c';
 797         else if (S_ISDIR(m))
 798                 mode[0] = 'd';
 799         else if (S_ISFIFO(m))
 800                 mode[0] = 'p';
 801         else if (S_ISLNK(m))
 802                 mode[0] = 'l';
 803         else if (S_ISSOCK(m))
 804                 mode[0] = 's';
 805         else
 806                 mode[0] = '?';
 807
 808         if (m & S_IRUSR) mode[1] = 'r';
 809         if (m & S_IWUSR) mode[2] = 'w';
 810         if (m & S_IXUSR) mode[3] = 'x';
 811         if (m & S_IRGRP) mode[4] = 'r';
 812         if (m & S_IWGRP) mode[5] = 'w';
 813         if (m & S_IXGRP) mode[6] = 'x';
 814         if (m & S_IROTH) mode[7] = 'r';
 815         if (m & S_IWOTH) mode[8] = 'w';
 816         if (m & S_IXOTH) mode[9] = 'x';
 817
 818         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 819         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 820         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 821
 822         return mode;
 823 }
 824
 825 int
 826 writefilestree(FILE *fp, git_tree *tree, const char *path)
 827 {
 828         const git_tree_entry *entry = NULL;
 829         git_submodule *module = NULL;
 830         git_object *obj = NULL;
 831         git_off_t filesize;
 832         const char *entryname;
 833         char filepath[PATH_MAX], entrypath[PATH_MAX];
 834         size_t count, i;
 835         int lc, r, ret;
 836
 837         count = git_tree_entrycount(tree);
 838         for (i = 0; i < count; i++) {
 839                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 840                     !(entryname = git_tree_entry_name(entry)))
 841                         return -1;
 842                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 843
 844                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 845                          entrypath);
 846                 if (r == -1 || (size_t)r >= sizeof(filepath))
 847                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 848
 849                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 850                         switch (git_object_type(obj)) {
 851                         case GIT_OBJ_BLOB:
 852                                 break;
 853                         case GIT_OBJ_TREE:
 854                                 /* NOTE: recurses */
 855                                 ret = writefilestree(fp, (git_tree *)obj,
 856                                                      entrypath);
 857                                 git_object_free(obj);
 858                                 if (ret)
 859                                         return ret;
 860                                 continue;
 861                         default:
 862                                 git_object_free(obj);
 863                                 continue;
 864                         }
 865
 866                         filesize = git_blob_rawsize((git_blob *)obj);
 867                         lc = writeblob(obj, filepath, entryname, filesize);
 868
 869                         fputs("<tr><td>", fp);
 870                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 871                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 872                         xmlencode(fp, entrypath, strlen(entrypath));
 873                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 874                         if (lc > 0)
 875                                 fprintf(fp, "%dL", lc);
 876                         else
 877                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 878                         fputs("</td></tr>\n", fp);
 879                         git_object_free(obj);
 880                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 881                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 882                                 relpath);
 883                         xmlencode(fp, entrypath, strlen(entrypath));
 884                         git_submodule_free(module);
 885                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 886                 }
 887         }
 888
 889         return 0;
 890 }
 891
 892 int
 893 writefiles(FILE *fp, const git_oid *id)
 894 {
 895         git_tree *tree = NULL;
 896         git_commit *commit = NULL;
 897         int ret = -1;
 898
 899         fputs("<table id=\"files\"><thead>\n<tr>"
 900               "<td><b>Mode</b></td><td><b>Name</b></td>"
 901               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 902               "</tr>\n</thead><tbody>\n", fp);
 903
 904         if (!git_commit_lookup(&commit, repo, id) &&
 905             !git_commit_tree(&tree, commit))
 906                 ret = writefilestree(fp, tree, "");
 907
 908         fputs("</tbody></table>", fp);
 909
 910         git_commit_free(commit);
 911         git_tree_free(tree);
 912
 913         return ret;
 914 }
 915
 916 int
 917 refs_cmp(const void *v1, const void *v2)
 918 {
 919         git_reference *r1 = (*(git_reference **)v1);
 920         git_reference *r2 = (*(git_reference **)v2);
 921         int r;
 922
 923         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 924                 return r;
 925
 926         return strcmp(git_reference_shorthand(r1),
 927                       git_reference_shorthand(r2));
 928 }
 929
 930 int
 931 writerefs(FILE *fp)
 932 {
 933         struct commitinfo *ci;
 934         const git_oid *id = NULL;
 935         git_object *obj = NULL;
 936         git_reference *dref = NULL, *r, *ref = NULL;
 937         git_reference_iterator *it = NULL;
 938         git_reference **refs = NULL;
 939         size_t count, i, j, refcount;
 940         const char *titles[] = { "Branches", "Tags" };
 941         const char *ids[] = { "branches", "tags" };
 942         const char *name;
 943
 944         if (git_reference_iterator_new(&it, repo))
 945                 return -1;
 946
 947         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 948                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 949                         err(1, "realloc");
 950                 refs[refcount] = ref;
 951         }
 952         git_reference_iterator_free(it);
 953
 954         /* sort by type then shorthand name */
 955         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 956
 957         for (j = 0; j < 2; j++) {
 958                 for (i = 0, count = 0; i < refcount; i++) {
 959                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 960                             !(git_reference_is_tag(refs[i]) && j == 1))
 961                                 continue;
 962
 963                         switch (git_reference_type(refs[i])) {
 964                         case GIT_REF_SYMBOLIC:
 965                                 if (git_reference_resolve(&dref, refs[i]))
 966                                         goto err;
 967                                 r = dref;
 968                                 break;
 969                         case GIT_REF_OID:
 970                                 r = refs[i];
 971                                 break;
 972                         default:
 973                                 continue;
 974                         }
 975                         if (!git_reference_target(r) ||
 976                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 977                                 goto err;
 978                         if (!(id = git_object_id(obj)))
 979                                 goto err;
 980                         if (!(ci = commitinfo_getbyoid(id)))
 981                                 break;
 982
 983                         /* print header if it has an entry (first). */
 984                         if (++count == 1) {
 985                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 986                                         "<thead>\n<tr><td><b>Name</b></td>"
 987                                         "<td><b>Last commit date</b></td>"
 988                                         "<td><b>Author</b></td>\n</tr>\n"
 989                                         "</thead><tbody>\n",
 990                                          titles[j], ids[j]);
 991                         }
 992
 993                         relpath = "";
 994                         name = git_reference_shorthand(r);
 995
 996                         fputs("<tr><td>", fp);
 997                         xmlencode(fp, name, strlen(name));
 998                         fputs("</td><td>", fp);
 999                         if (ci->author)
1000                                 printtimeshort(fp, &(ci->author->when));
1001                         fputs("</td><td>", fp);
1002                         if (ci->author)
1003                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1004                         fputs("</td></tr>\n", fp);
1005
1006                         relpath = "../";
1007
1008                         commitinfo_free(ci);
1009                         git_object_free(obj);
1010                         obj = NULL;
1011                         git_reference_free(dref);
1012                         dref = NULL;
1013                 }
1014                 /* table footer */
1015                 if (count)
1016                         fputs("</tbody></table><br/>", fp);
1017         }
1018
1019 err:
1020         git_object_free(obj);
1021         git_reference_free(dref);
1022
1023         for (i = 0; i < refcount; i++)
1024                 git_reference_free(refs[i]);
1025         free(refs);
1026
1027         return 0;
1028 }
1029
1030 void
1031 usage(char *argv0)
1032 {
1033         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1034         exit(1);
1035 }
1036
1037 int
1038 main(int argc, char *argv[])
1039 {
1040         git_object *obj = NULL;
1041         const git_oid *head = NULL;
1042         const git_error *e = NULL;
1043         mode_t mask;
1044         FILE *fp, *fpread;
1045         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1046         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1047         size_t n;
1048         int i, fd;
1049
1050         for (i = 1; i < argc; i++) {
1051                 if (argv[i][0] != '-') {
1052                         if (repodir)
1053                                 usage(argv[0]);
1054                         repodir = argv[i];
1055                 } else if (argv[i][1] == 'c') {
1056                         if (nlogcommits > 0 || i + 1 >= argc)
1057                                 usage(argv[0]);
1058                         cachefile = argv[++i];
1059                 } else if (argv[i][1] == 'l') {
1060                         if (cachefile || i + 1 >= argc)
1061                                 usage(argv[0]);
1062                         errno = 0;
1063                         nlogcommits = strtoll(argv[++i], &p, 10);
1064                         if (argv[i][0] == '\0' || *p != '\0' ||
1065                             nlogcommits <= 0 || errno)
1066                                 usage(argv[0]);
1067                 }
1068         }
1069         if (!repodir)
1070                 usage(argv[0]);
1071
1072         if (!realpath(repodir, repodirabs))
1073                 err(1, "realpath");
1074
1075         git_libgit2_init();
1076
1077 #ifdef __OpenBSD__
1078         if (cachefile) {
1079                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1080                         err(1, "pledge");
1081         } else {
1082                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1083                         err(1, "pledge");
1084         }
1085 #endif
1086
1087         if (git_repository_open_ext(&repo, repodir,
1088                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1089                 e = giterr_last();
1090                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1091                 return 1;
1092         }
1093
1094         /* find HEAD */
1095         if (!git_revparse_single(&obj, repo, "HEAD"))
1096                 head = git_object_id(obj);
1097         git_object_free(obj);
1098
1099         /* use directory name as name */
1100         if ((name = strrchr(repodirabs, '/')))
1101                 name++;
1102         else
1103                 name = "";
1104
1105         /* strip .git suffix */
1106         if (!(strippedname = strdup(name)))
1107                 err(1, "strdup");
1108         if ((p = strrchr(strippedname, '.')))
1109                 if (!strcmp(p, ".git"))
1110                         *p = '\0';
1111
1112         /* read description or .git/description */
1113         joinpath(path, sizeof(path), repodir, "description");
1114         if (!(fpread = fopen(path, "r"))) {
1115                 joinpath(path, sizeof(path), repodir, ".git/description");
1116                 fpread = fopen(path, "r");
1117         }
1118         if (fpread) {
1119                 if (!fgets(description, sizeof(description), fpread))
1120                         description[0] = '\0';
1121                 fclose(fpread);
1122         }
1123
1124         /* read url or .git/url */
1125         joinpath(path, sizeof(path), repodir, "url");
1126         if (!(fpread = fopen(path, "r"))) {
1127                 joinpath(path, sizeof(path), repodir, ".git/url");
1128                 fpread = fopen(path, "r");
1129         }
1130         if (fpread) {
1131                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1132                         cloneurl[0] = '\0';
1133                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1134                 fclose(fpread);
1135         }
1136
1137         /* check LICENSE */
1138         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1139                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1140                     git_object_type(obj) == GIT_OBJ_BLOB)
1141                         license = licensefiles[i] + strlen("HEAD:");
1142                 git_object_free(obj);
1143         }
1144
1145         /* check README */
1146         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1147                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1148                     git_object_type(obj) == GIT_OBJ_BLOB)
1149                         readme = readmefiles[i] + strlen("HEAD:");
1150                 git_object_free(obj);
1151         }
1152
1153         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1154             git_object_type(obj) == GIT_OBJ_BLOB)
1155                 submodules = ".gitmodules";
1156         git_object_free(obj);
1157
1158         /* log for HEAD */
1159         fp = efopen("log.html", "w");
1160         relpath = "";
1161         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1162         writeheader(fp, "Log");
1163         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1164               "<td><b>Commit message</b></td>"
1165               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1166               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1167               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1168
1169         if (cachefile && head) {
1170                 /* read from cache file (does not need to exist) */
1171                 if ((rcachefp = fopen(cachefile, "r"))) {
1172                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1173                                 errx(1, "%s: no object id", cachefile);
1174                         if (git_oid_fromstr(&lastoid, lastoidstr))
1175                                 errx(1, "%s: invalid object id", cachefile);
1176                 }
1177
1178                 /* write log to (temporary) cache */
1179                 if ((fd = mkstemp(tmppath)) == -1)
1180                         err(1, "mkstemp");
1181                 if (!(wcachefp = fdopen(fd, "w")))
1182                         err(1, "fdopen: '%s'", tmppath);
1183                 /* write last commit id (HEAD) */
1184                 git_oid_tostr(buf, sizeof(buf), head);
1185                 fprintf(wcachefp, "%s\n", buf);
1186
1187                 writelog(fp, head);
1188
1189                 if (rcachefp) {
1190                         /* append previous log to log.html and the new cache */
1191                         while (!feof(rcachefp)) {
1192                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1193                                 if (ferror(rcachefp))
1194                                         err(1, "fread");
1195                                 if (fwrite(buf, 1, n, fp) != n ||
1196                                     fwrite(buf, 1, n, wcachefp) != n)
1197                                         err(1, "fwrite");
1198                         }
1199                         fclose(rcachefp);
1200                 }
1201                 fclose(wcachefp);
1202         } else {
1203                 if (head)
1204                         writelog(fp, head);
1205         }
1206
1207         fputs("</tbody></table>", fp);
1208         writefooter(fp);
1209         fclose(fp);
1210
1211         /* files for HEAD */
1212         fp = efopen("files.html", "w");
1213         writeheader(fp, "Files");
1214         if (head)
1215                 writefiles(fp, head);
1216         writefooter(fp);
1217         fclose(fp);
1218
1219         /* summary page with branches and tags */
1220         fp = efopen("refs.html", "w");
1221         writeheader(fp, "Refs");
1222         writerefs(fp);
1223         writefooter(fp);
1224         fclose(fp);
1225
1226         /* Atom feed */
1227         fp = efopen("atom.xml", "w");
1228         writeatom(fp);
1229         fclose(fp);
1230
1231         /* rename new cache file on success */
1232         if (cachefile && head) {
1233                 if (rename(tmppath, cachefile))
1234                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1235                 umask((mask = umask(0)));
1236                 if (chmod(cachefile,
1237                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1238                         err(1, "chmod: '%s'", cachefile);
1239         }
1240
1241         /* cleanup */
1242         git_repository_free(repo);
1243         git_libgit2_shutdown();
1244
1245         return 0;
1246 }