stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <inttypes.h>
   7 #include <libgen.h>
   8 #include <limits.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13
  14 #include <git2.h>
  15
  16 #include "compat.h"
  17
  18 struct deltainfo {
  19         git_patch *patch;
  20
  21         size_t addcount;
  22         size_t delcount;
  23 };
  24
  25 struct commitinfo {
  26         const git_oid *id;
  27
  28         char oid[GIT_OID_HEXSZ + 1];
  29         char parentoid[GIT_OID_HEXSZ + 1];
  30
  31         const git_signature *author;
  32         const git_signature *committer;
  33         const char          *summary;
  34         const char          *msg;
  35
  36         git_diff   *diff;
  37         git_commit *commit;
  38         git_commit *parent;
  39         git_tree   *commit_tree;
  40         git_tree   *parent_tree;
  41
  42         size_t addcount;
  43         size_t delcount;
  44         size_t filecount;
  45
  46         struct deltainfo **deltas;
  47         size_t ndeltas;
  48 };
  49
  50 static git_repository *repo;
  51
  52 static const char *relpath = "";
  53 static const char *repodir;
  54
  55 static char *name = "";
  56 static char *strippedname = "";
  57 static char description[255];
  58 static char cloneurl[1024];
  59 static int haslicense, hasreadme, hassubmodules;
  60 static long long nlogcommits = -1; /* < 0 indicates not used */
  61
  62 /* cache */
  63 static git_oid lastoid;
  64 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  65 static FILE *rcachefp, *wcachefp;
  66 static const char *cachefile;
  67
  68 #ifndef USE_PLEDGE
  69 #define pledge(p1,p2) 0
  70 #endif
  71
  72 void
  73 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  74 {
  75         int r;
  76
  77         r = snprintf(buf, bufsiz, "%s%s%s",
  78                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  79         if (r == -1 || (size_t)r >= bufsiz)
  80                 errx(1, "path truncated: '%s%s%s'",
  81                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  82 }
  83
  84 void
  85 deltainfo_free(struct deltainfo *di)
  86 {
  87         if (!di)
  88                 return;
  89         git_patch_free(di->patch);
  90         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         const git_diff_delta *delta;
 100         const git_diff_hunk *hunk;
 101         const git_diff_line *line;
 102         git_patch *patch = NULL;
 103         size_t ndeltas, nhunks, nhunklines;
 104         size_t i, j, k;
 105
 106         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 107                 goto err;
 108         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 109                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 110                         ci->parent = NULL;
 111                         ci->parent_tree = NULL;
 112                 }
 113         }
 114
 115         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 116         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 117         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 118                 goto err;
 119
 120         ndeltas = git_diff_num_deltas(ci->diff);
 121         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 122                 err(1, "calloc");
 123
 124         for (i = 0; i < ndeltas; i++) {
 125                 if (git_patch_from_diff(&patch, ci->diff, i))
 126                         goto err;
 127                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 128                         err(1, "calloc");
 129                 di->patch = patch;
 130                 ci->deltas[i] = di;
 131
 132                 delta = git_patch_get_delta(patch);
 133
 134                 /* skip stats for binary data */
 135                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 136                         continue;
 137
 138                 nhunks = git_patch_num_hunks(patch);
 139                 for (j = 0; j < nhunks; j++) {
 140                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 141                                 break;
 142                         for (k = 0; ; k++) {
 143                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 144                                         break;
 145                                 if (line->old_lineno == -1) {
 146                                         di->addcount++;
 147                                         ci->addcount++;
 148                                 } else if (line->new_lineno == -1) {
 149                                         di->delcount++;
 150                                         ci->delcount++;
 151                                 }
 152                         }
 153                 }
 154         }
 155         ci->ndeltas = i;
 156         ci->filecount = i;
 157
 158         return 0;
 159
 160 err:
 161         git_diff_free(ci->diff);
 162         ci->diff = NULL;
 163         git_tree_free(ci->commit_tree);
 164         ci->commit_tree = NULL;
 165         git_tree_free(ci->parent_tree);
 166         ci->parent_tree = NULL;
 167         git_commit_free(ci->parent);
 168         ci->parent = NULL;
 169
 170         if (ci->deltas)
 171                 for (i = 0; i < ci->ndeltas; i++)
 172                         deltainfo_free(ci->deltas[i]);
 173         free(ci->deltas);
 174         ci->deltas = NULL;
 175         ci->ndeltas = 0;
 176         ci->addcount = 0;
 177         ci->delcount = 0;
 178         ci->filecount = 0;
 179
 180         return -1;
 181 }
 182
 183 void
 184 commitinfo_free(struct commitinfo *ci)
 185 {
 186         size_t i;
 187
 188         if (!ci)
 189                 return;
 190         if (ci->deltas)
 191                 for (i = 0; i < ci->ndeltas; i++)
 192                         deltainfo_free(ci->deltas[i]);
 193
 194         free(ci->deltas);
 195         git_diff_free(ci->diff);
 196         git_tree_free(ci->commit_tree);
 197         git_tree_free(ci->parent_tree);
 198         git_commit_free(ci->commit);
 199         git_commit_free(ci->parent);
 200         memset(ci, 0, sizeof(*ci));
 201         free(ci);
 202 }
 203
 204 struct commitinfo *
 205 commitinfo_getbyoid(const git_oid *id)
 206 {
 207         struct commitinfo *ci;
 208
 209         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 210                 err(1, "calloc");
 211
 212         if (git_commit_lookup(&(ci->commit), repo, id))
 213                 goto err;
 214         ci->id = id;
 215
 216         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 217         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 218
 219         ci->author = git_commit_author(ci->commit);
 220         ci->committer = git_commit_committer(ci->commit);
 221         ci->summary = git_commit_summary(ci->commit);
 222         ci->msg = git_commit_message(ci->commit);
 223
 224         return ci;
 225
 226 err:
 227         commitinfo_free(ci);
 228
 229         return NULL;
 230 }
 231
 232 FILE *
 233 efopen(const char *name, const char *flags)
 234 {
 235         FILE *fp;
 236
 237         if (!(fp = fopen(name, flags)))
 238                 err(1, "fopen: '%s'", name);
 239
 240         return fp;
 241 }
 242
 243 /* Escape characters below as HTML 2.0 / XML 1.0. */
 244 void
 245 xmlencode(FILE *fp, const char *s, size_t len)
 246 {
 247         size_t i;
 248
 249         for (i = 0; *s && i < len; s++, i++) {
 250                 switch(*s) {
 251                 case '<':  fputs("&lt;",   fp); break;
 252                 case '>':  fputs("&gt;",   fp); break;
 253                 case '\'': fputs("&#39;",  fp); break;
 254                 case '&':  fputs("&amp;",  fp); break;
 255                 case '"':  fputs("&quot;", fp); break;
 256                 default:   fputc(*s, fp);
 257                 }
 258         }
 259 }
 260
 261 int
 262 mkdirp(const char *path)
 263 {
 264         char tmp[PATH_MAX], *p;
 265
 266         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 267                 errx(1, "path truncated: '%s'", path);
 268         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 269                 if (*p != '/')
 270                         continue;
 271                 *p = '\0';
 272                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 273                         return -1;
 274                 *p = '/';
 275         }
 276         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 277                 return -1;
 278         return 0;
 279 }
 280
 281 void
 282 printtimez(FILE *fp, const git_time *intime)
 283 {
 284         struct tm *intm;
 285         time_t t;
 286         char out[32];
 287
 288         t = (time_t)intime->time;
 289         if (!(intm = gmtime(&t)))
 290                 return;
 291         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 292         fputs(out, fp);
 293 }
 294
 295 void
 296 printtime(FILE *fp, const git_time *intime)
 297 {
 298         struct tm *intm;
 299         time_t t;
 300         char out[32];
 301
 302         t = (time_t)intime->time + (intime->offset * 60);
 303         if (!(intm = gmtime(&t)))
 304                 return;
 305         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 306         if (intime->offset < 0)
 307                 fprintf(fp, "%s -%02d%02d", out,
 308                             -(intime->offset) / 60, -(intime->offset) % 60);
 309         else
 310                 fprintf(fp, "%s +%02d%02d", out,
 311                             intime->offset / 60, intime->offset % 60);
 312 }
 313
 314 void
 315 printtimeshort(FILE *fp, const git_time *intime)
 316 {
 317         struct tm *intm;
 318         time_t t;
 319         char out[32];
 320
 321         t = (time_t)intime->time;
 322         if (!(intm = gmtime(&t)))
 323                 return;
 324         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 325         fputs(out, fp);
 326 }
 327
 328 void
 329 writeheader(FILE *fp, const char *title)
 330 {
 331         fputs("<!DOCTYPE html>\n"
 332                 "<html>\n<head>\n"
 333                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 334                 "<title>", fp);
 335         xmlencode(fp, title, strlen(title));
 336         if (title[0] && strippedname[0])
 337                 fputs(" - ", fp);
 338         xmlencode(fp, strippedname, strlen(strippedname));
 339         if (description[0])
 340                 fputs(" - ", fp);
 341         xmlencode(fp, description, strlen(description));
 342         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 343         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 344                 name, relpath);
 345         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 346         fputs("</head>\n<body>\n<table><tr><td>", fp);
 347         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 348                 relpath, relpath);
 349         fputs("</td><td><h1>", fp);
 350         xmlencode(fp, strippedname, strlen(strippedname));
 351         fputs("</h1><span class=\"desc\">", fp);
 352         xmlencode(fp, description, strlen(description));
 353         fputs("</span></td></tr>", fp);
 354         if (cloneurl[0]) {
 355                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 356                 xmlencode(fp, cloneurl, strlen(cloneurl));
 357                 fputs("\">", fp);
 358                 xmlencode(fp, cloneurl, strlen(cloneurl));
 359                 fputs("</a></td></tr>", fp);
 360         }
 361         fputs("<tr><td></td><td>\n", fp);
 362         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 363         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 364         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 365         if (hassubmodules)
 366                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 367         if (hasreadme)
 368                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 369         if (haslicense)
 370                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 371         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 372 }
 373
 374 void
 375 writefooter(FILE *fp)
 376 {
 377         fputs("</div>\n</body>\n</html>\n", fp);
 378 }
 379
 380 int
 381 writeblobhtml(FILE *fp, const git_blob *blob)
 382 {
 383         size_t n = 0, i, prev;
 384         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 385         const char *s = git_blob_rawcontent(blob);
 386         git_off_t len = git_blob_rawsize(blob);
 387
 388         fputs("<pre id=\"blob\">\n", fp);
 389
 390         if (len > 0) {
 391                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 392                         if (s[i] != '\n')
 393                                 continue;
 394                         n++;
 395                         fprintf(fp, nfmt, n, n, n);
 396                         xmlencode(fp, &s[prev], i - prev + 1);
 397                         prev = i + 1;
 398                 }
 399                 /* trailing data */
 400                 if ((len - prev) > 0) {
 401                         n++;
 402                         fprintf(fp, nfmt, n, n, n);
 403                         xmlencode(fp, &s[prev], len - prev);
 404                 }
 405         }
 406
 407         fputs("</pre>\n", fp);
 408
 409         return n;
 410 }
 411
 412 void
 413 printcommit(FILE *fp, struct commitinfo *ci)
 414 {
 415         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 416                 relpath, ci->oid, ci->oid);
 417
 418         if (ci->parentoid[0])
 419                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 420                         relpath, ci->parentoid, ci->parentoid);
 421
 422         if (ci->author) {
 423                 fputs("<b>Author:</b> ", fp);
 424                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 425                 fputs(" &lt;<a href=\"mailto:", fp);
 426                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 427                 fputs("\">", fp);
 428                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 429                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 430                 printtime(fp, &(ci->author->when));
 431                 fputc('\n', fp);
 432         }
 433         if (ci->msg) {
 434                 fputc('\n', fp);
 435                 xmlencode(fp, ci->msg, strlen(ci->msg));
 436                 fputc('\n', fp);
 437         }
 438 }
 439
 440 void
 441 printshowfile(FILE *fp, struct commitinfo *ci)
 442 {
 443         const git_diff_delta *delta;
 444         const git_diff_hunk *hunk;
 445         const git_diff_line *line;
 446         git_patch *patch;
 447         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 448         char linestr[80];
 449
 450         printcommit(fp, ci);
 451
 452         if (!ci->deltas)
 453                 return;
 454
 455         if (ci->filecount > 1000   ||
 456             ci->ndeltas   > 1000   ||
 457             ci->addcount  > 100000 ||
 458             ci->delcount  > 100000) {
 459                 fputs("Diff is too large, output suppressed.\n", fp);
 460                 return;
 461         }
 462
 463         /* diff stat */
 464         fputs("<b>Diffstat:</b>\n<table>", fp);
 465         for (i = 0; i < ci->ndeltas; i++) {
 466                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 467                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 468                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 469                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 470                         fputs(" -&gt; ", fp);
 471                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 472                 }
 473
 474                 add = ci->deltas[i]->addcount;
 475                 del = ci->deltas[i]->delcount;
 476                 changed = add + del;
 477                 total = sizeof(linestr) - 2;
 478                 if (changed > total) {
 479                         if (add)
 480                                 add = ((float)total / changed * add) + 1;
 481                         if (del)
 482                                 del = ((float)total / changed * del) + 1;
 483                 }
 484                 memset(&linestr, '+', add);
 485                 memset(&linestr[add], '-', del);
 486
 487                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 488                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 489                 fwrite(&linestr, 1, add, fp);
 490                 fputs("</span><span class=\"d\">", fp);
 491                 fwrite(&linestr[add], 1, del, fp);
 492                 fputs("</span></td></tr>\n", fp);
 493         }
 494         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 495                 ci->filecount, ci->filecount == 1 ? "" : "s",
 496                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 497                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 498
 499         fputs("<hr/>", fp);
 500
 501         for (i = 0; i < ci->ndeltas; i++) {
 502                 patch = ci->deltas[i]->patch;
 503                 delta = git_patch_get_delta(patch);
 504                 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",
 505                         i, relpath, delta->old_file.path, delta->old_file.path,
 506                         relpath, delta->new_file.path, delta->new_file.path);
 507
 508                 /* check binary data */
 509                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 510                         fputs("Binary files differ.\n", fp);
 511                         continue;
 512                 }
 513
 514                 nhunks = git_patch_num_hunks(patch);
 515                 for (j = 0; j < nhunks; j++) {
 516                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 517                                 break;
 518
 519                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 520                         xmlencode(fp, hunk->header, hunk->header_len);
 521                         fputs("</a>", fp);
 522
 523                         for (k = 0; ; k++) {
 524                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 525                                         break;
 526                                 if (line->old_lineno == -1)
 527                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 528                                                 i, j, k, i, j, k);
 529                                 else if (line->new_lineno == -1)
 530                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 531                                                 i, j, k, i, j, k);
 532                                 else
 533                                         fputc(' ', fp);
 534                                 xmlencode(fp, line->content, line->content_len);
 535                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 536                                         fputs("</a>", fp);
 537                         }
 538                 }
 539         }
 540 }
 541
 542 void
 543 writelogline(FILE *fp, struct commitinfo *ci)
 544 {
 545         fputs("<tr><td>", fp);
 546         if (ci->author)
 547                 printtimeshort(fp, &(ci->author->when));
 548         fputs("</td><td>", fp);
 549         if (ci->summary) {
 550                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 551                 xmlencode(fp, ci->summary, strlen(ci->summary));
 552                 fputs("</a>", fp);
 553         }
 554         fputs("</td><td>", fp);
 555         if (ci->author)
 556                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 557         fputs("</td><td class=\"num\" align=\"right\">", fp);
 558         fprintf(fp, "%zu", ci->filecount);
 559         fputs("</td><td class=\"num\" align=\"right\">", fp);
 560         fprintf(fp, "+%zu", ci->addcount);
 561         fputs("</td><td class=\"num\" align=\"right\">", fp);
 562         fprintf(fp, "-%zu", ci->delcount);
 563         fputs("</td></tr>\n", fp);
 564 }
 565
 566 int
 567 writelog(FILE *fp, const git_oid *oid)
 568 {
 569         struct commitinfo *ci;
 570         git_revwalk *w = NULL;
 571         git_oid id;
 572         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 573         FILE *fpfile;
 574         int r;
 575
 576         git_revwalk_new(&w, repo);
 577         git_revwalk_push(w, oid);
 578         git_revwalk_sorting(w, GIT_SORT_TIME);
 579         git_revwalk_simplify_first_parent(w);
 580
 581         while (!git_revwalk_next(&id, w)) {
 582                 relpath = "";
 583
 584                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 585                         break;
 586
 587                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 588                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 589                 if (r == -1 || (size_t)r >= sizeof(path))
 590                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 591                 r = access(path, F_OK);
 592
 593                 /* optimization: if there are no log lines to write and
 594                    the commit file already exists: skip the diffstat */
 595                 if (!nlogcommits && !r)
 596                         continue;
 597
 598                 if (!(ci = commitinfo_getbyoid(&id)))
 599                         break;
 600                 /* diffstat: for stagit HTML required for the log.html line */
 601                 if (commitinfo_getstats(ci) == -1)
 602                         goto err;
 603
 604                 if (nlogcommits < 0) {
 605                         writelogline(fp, ci);
 606                 } else if (nlogcommits > 0) {
 607                         writelogline(fp, ci);
 608                         nlogcommits--;
 609                 }
 610
 611                 if (cachefile)
 612                         writelogline(wcachefp, ci);
 613
 614                 /* check if file exists if so skip it */
 615                 if (r) {
 616                         relpath = "../";
 617                         fpfile = efopen(path, "w");
 618                         writeheader(fpfile, ci->summary);
 619                         fputs("<pre>", fpfile);
 620                         printshowfile(fpfile, ci);
 621                         fputs("</pre>\n", fpfile);
 622                         writefooter(fpfile);
 623                         fclose(fpfile);
 624                 }
 625 err:
 626                 commitinfo_free(ci);
 627         }
 628         git_revwalk_free(w);
 629
 630         relpath = "";
 631
 632         return 0;
 633 }
 634
 635 void
 636 printcommitatom(FILE *fp, struct commitinfo *ci)
 637 {
 638         fputs("<entry>\n", fp);
 639
 640         fprintf(fp, "<id>%s</id>\n", ci->oid);
 641         if (ci->author) {
 642                 fputs("<published>", fp);
 643                 printtimez(fp, &(ci->author->when));
 644                 fputs("</published>\n", fp);
 645         }
 646         if (ci->committer) {
 647                 fputs("<updated>", fp);
 648                 printtimez(fp, &(ci->committer->when));
 649                 fputs("</updated>\n", fp);
 650         }
 651         if (ci->summary) {
 652                 fputs("<title type=\"text\">", fp);
 653                 xmlencode(fp, ci->summary, strlen(ci->summary));
 654                 fputs("</title>\n", fp);
 655         }
 656         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 657                 ci->oid);
 658
 659         if (ci->author) {
 660                 fputs("<author><name>", fp);
 661                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 662                 fputs("</name>\n<email>", fp);
 663                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 664                 fputs("</email>\n</author>\n", fp);
 665         }
 666
 667         fputs("<content type=\"text\">", fp);
 668         fprintf(fp, "commit %s\n", ci->oid);
 669         if (ci->parentoid[0])
 670                 fprintf(fp, "parent %s\n", ci->parentoid);
 671         if (ci->author) {
 672                 fputs("Author: ", fp);
 673                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 674                 fputs(" &lt;", fp);
 675                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 676                 fputs("&gt;\nDate:   ", fp);
 677                 printtime(fp, &(ci->author->when));
 678                 fputc('\n', fp);
 679         }
 680         if (ci->msg) {
 681                 fputc('\n', fp);
 682                 xmlencode(fp, ci->msg, strlen(ci->msg));
 683         }
 684         fputs("\n</content>\n</entry>\n", fp);
 685 }
 686
 687 int
 688 writeatom(FILE *fp)
 689 {
 690         struct commitinfo *ci;
 691         git_revwalk *w = NULL;
 692         git_oid id;
 693         size_t i, m = 100; /* last 'm' commits */
 694
 695         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 696               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 697         xmlencode(fp, strippedname, strlen(strippedname));
 698         fputs(", branch HEAD</title>\n<subtitle>", fp);
 699         xmlencode(fp, description, strlen(description));
 700         fputs("</subtitle>\n", fp);
 701
 702         git_revwalk_new(&w, repo);
 703         git_revwalk_push_head(w);
 704         git_revwalk_sorting(w, GIT_SORT_TIME);
 705         git_revwalk_simplify_first_parent(w);
 706
 707         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 708                 if (!(ci = commitinfo_getbyoid(&id)))
 709                         break;
 710                 printcommitatom(fp, ci);
 711                 commitinfo_free(ci);
 712         }
 713         git_revwalk_free(w);
 714
 715         fputs("</feed>\n", fp);
 716
 717         return 0;
 718 }
 719
 720 int
 721 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 722 {
 723         char tmp[PATH_MAX] = "", *d;
 724         const char *p;
 725         int lc = 0;
 726         FILE *fp;
 727
 728         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 729                 errx(1, "path truncated: '%s'", fpath);
 730         if (!(d = dirname(tmp)))
 731                 err(1, "dirname");
 732         if (mkdirp(d))
 733                 return -1;
 734
 735         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 736                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 737                         errx(1, "path truncated: '../%s'", tmp);
 738         }
 739         relpath = tmp;
 740
 741         fp = efopen(fpath, "w");
 742         writeheader(fp, filename);
 743         fputs("<p> ", fp);
 744         xmlencode(fp, filename, strlen(filename));
 745         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 746         fputs("</p><hr/>", fp);
 747
 748         if (git_blob_is_binary((git_blob *)obj)) {
 749                 fputs("<p>Binary file.</p>\n", fp);
 750         } else {
 751                 lc = writeblobhtml(fp, (git_blob *)obj);
 752                 if (ferror(fp))
 753                         err(1, "fwrite");
 754         }
 755         writefooter(fp);
 756         fclose(fp);
 757
 758         relpath = "";
 759
 760         return lc;
 761 }
 762
 763 const char *
 764 filemode(git_filemode_t m)
 765 {
 766         static char mode[11];
 767
 768         memset(mode, '-', sizeof(mode) - 1);
 769         mode[10] = '\0';
 770
 771         if (S_ISREG(m))
 772                 mode[0] = '-';
 773         else if (S_ISBLK(m))
 774                 mode[0] = 'b';
 775         else if (S_ISCHR(m))
 776                 mode[0] = 'c';
 777         else if (S_ISDIR(m))
 778                 mode[0] = 'd';
 779         else if (S_ISFIFO(m))
 780                 mode[0] = 'p';
 781         else if (S_ISLNK(m))
 782                 mode[0] = 'l';
 783         else if (S_ISSOCK(m))
 784                 mode[0] = 's';
 785         else
 786                 mode[0] = '?';
 787
 788         if (m & S_IRUSR) mode[1] = 'r';
 789         if (m & S_IWUSR) mode[2] = 'w';
 790         if (m & S_IXUSR) mode[3] = 'x';
 791         if (m & S_IRGRP) mode[4] = 'r';
 792         if (m & S_IWGRP) mode[5] = 'w';
 793         if (m & S_IXGRP) mode[6] = 'x';
 794         if (m & S_IROTH) mode[7] = 'r';
 795         if (m & S_IWOTH) mode[8] = 'w';
 796         if (m & S_IXOTH) mode[9] = 'x';
 797
 798         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 799         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 800         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 801
 802         return mode;
 803 }
 804
 805 int
 806 writefilestree(FILE *fp, git_tree *tree, const char *path)
 807 {
 808         const git_tree_entry *entry = NULL;
 809         git_submodule *module = NULL;
 810         git_object *obj = NULL;
 811         git_off_t filesize;
 812         const char *entryname;
 813         char filepath[PATH_MAX], entrypath[PATH_MAX];
 814         size_t count, i;
 815         int lc, r, ret;
 816
 817         count = git_tree_entrycount(tree);
 818         for (i = 0; i < count; i++) {
 819                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 820                     !(entryname = git_tree_entry_name(entry)))
 821                         return -1;
 822                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 823
 824                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 825                          entrypath);
 826                 if (r == -1 || (size_t)r >= sizeof(filepath))
 827                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 828
 829                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 830                         switch (git_object_type(obj)) {
 831                         case GIT_OBJ_BLOB:
 832                                 break;
 833                         case GIT_OBJ_TREE:
 834                                 /* NOTE: recurses */
 835                                 ret = writefilestree(fp, (git_tree *)obj,
 836                                                      entrypath);
 837                                 git_object_free(obj);
 838                                 if (ret)
 839                                         return ret;
 840                                 continue;
 841                         default:
 842                                 git_object_free(obj);
 843                                 continue;
 844                         }
 845
 846                         filesize = git_blob_rawsize((git_blob *)obj);
 847                         lc = writeblob(obj, filepath, entryname, filesize);
 848
 849                         fputs("<tr><td>", fp);
 850                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 851                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 852                         xmlencode(fp, entrypath, strlen(entrypath));
 853                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 854                         if (lc > 0)
 855                                 fprintf(fp, "%dL", lc);
 856                         else
 857                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 858                         fputs("</td></tr>\n", fp);
 859                         git_object_free(obj);
 860                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 861                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 862                                 relpath);
 863                         xmlencode(fp, entrypath, strlen(entrypath));
 864                         git_submodule_free(module);
 865                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 866                 }
 867         }
 868
 869         return 0;
 870 }
 871
 872 int
 873 writefiles(FILE *fp, const git_oid *id)
 874 {
 875         git_tree *tree = NULL;
 876         git_commit *commit = NULL;
 877         int ret = -1;
 878
 879         fputs("<table id=\"files\"><thead>\n<tr>"
 880               "<td><b>Mode</b></td><td><b>Name</b></td>"
 881               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 882               "</tr>\n</thead><tbody>\n", fp);
 883
 884         if (!git_commit_lookup(&commit, repo, id) &&
 885             !git_commit_tree(&tree, commit))
 886                 ret = writefilestree(fp, tree, "");
 887
 888         fputs("</tbody></table>", fp);
 889
 890         git_commit_free(commit);
 891         git_tree_free(tree);
 892
 893         return ret;
 894 }
 895
 896 int
 897 refs_cmp(const void *v1, const void *v2)
 898 {
 899         git_reference *r1 = (*(git_reference **)v1);
 900         git_reference *r2 = (*(git_reference **)v2);
 901         int r;
 902
 903         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 904                 return r;
 905
 906         return strcmp(git_reference_shorthand(r1),
 907                       git_reference_shorthand(r2));
 908 }
 909
 910 int
 911 writerefs(FILE *fp)
 912 {
 913         struct commitinfo *ci;
 914         const git_oid *id = NULL;
 915         git_object *obj = NULL;
 916         git_reference *dref = NULL, *r, *ref = NULL;
 917         git_reference_iterator *it = NULL;
 918         git_reference **refs = NULL;
 919         size_t count, i, j, refcount;
 920         const char *titles[] = { "Branches", "Tags" };
 921         const char *ids[] = { "branches", "tags" };
 922         const char *name;
 923
 924         if (git_reference_iterator_new(&it, repo))
 925                 return -1;
 926
 927         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 928                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 929                         err(1, "realloc");
 930                 refs[refcount] = ref;
 931         }
 932         git_reference_iterator_free(it);
 933
 934         /* sort by type then shorthand name */
 935         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 936
 937         for (j = 0; j < 2; j++) {
 938                 for (i = 0, count = 0; i < refcount; i++) {
 939                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 940                             !(git_reference_is_tag(refs[i]) && j == 1))
 941                                 continue;
 942
 943                         switch (git_reference_type(refs[i])) {
 944                         case GIT_REF_SYMBOLIC:
 945                                 if (git_reference_resolve(&dref, refs[i]))
 946                                         goto err;
 947                                 r = dref;
 948                                 break;
 949                         case GIT_REF_OID:
 950                                 r = refs[i];
 951                                 break;
 952                         default:
 953                                 continue;
 954                         }
 955                         if (!git_reference_target(r) ||
 956                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 957                                 goto err;
 958                         if (!(id = git_object_id(obj)))
 959                                 goto err;
 960                         if (!(ci = commitinfo_getbyoid(id)))
 961                                 break;
 962
 963                         /* print header if it has an entry (first). */
 964                         if (++count == 1) {
 965                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 966                                         "<thead>\n<tr><td><b>Name</b></td>"
 967                                         "<td><b>Last commit date</b></td>"
 968                                         "<td><b>Author</b></td>\n</tr>\n"
 969                                         "</thead><tbody>\n",
 970                                          titles[j], ids[j]);
 971                         }
 972
 973                         relpath = "";
 974                         name = git_reference_shorthand(r);
 975
 976                         fputs("<tr><td>", fp);
 977                         xmlencode(fp, name, strlen(name));
 978                         fputs("</td><td>", fp);
 979                         if (ci->author)
 980                                 printtimeshort(fp, &(ci->author->when));
 981                         fputs("</td><td>", fp);
 982                         if (ci->author)
 983                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 984                         fputs("</td></tr>\n", fp);
 985
 986                         relpath = "../";
 987
 988                         commitinfo_free(ci);
 989                         git_object_free(obj);
 990                         obj = NULL;
 991                         git_reference_free(dref);
 992                         dref = NULL;
 993                 }
 994                 /* table footer */
 995                 if (count)
 996                         fputs("</tbody></table><br/>", fp);
 997         }
 998
 999 err:
1000         git_object_free(obj);
1001         git_reference_free(dref);
1002
1003         for (i = 0; i < refcount; i++)
1004                 git_reference_free(refs[i]);
1005         free(refs);
1006
1007         return 0;
1008 }
1009
1010 void
1011 usage(char *argv0)
1012 {
1013         fprintf(stderr, "%s [-c cachefile] [-l commits] repodir\n", argv0);
1014         exit(1);
1015 }
1016
1017 int
1018 main(int argc, char *argv[])
1019 {
1020         git_object *obj = NULL;
1021         const git_oid *head = NULL;
1022         const git_error *e = NULL;
1023         mode_t mask;
1024         FILE *fp, *fpread;
1025         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1026         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1027         size_t n;
1028         int i, fd;
1029
1030         if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1031                 err(1, "pledge");
1032
1033         for (i = 1; i < argc; i++) {
1034                 if (argv[i][0] != '-') {
1035                         if (repodir)
1036                                 usage(argv[0]);
1037                         repodir = argv[i];
1038                 } else if (argv[i][1] == 'c') {
1039                         if (nlogcommits > 0 || i + 1 >= argc)
1040                                 usage(argv[0]);
1041                         cachefile = argv[++i];
1042                 } else if (argv[i][1] == 'l') {
1043                         if (cachefile || i + 1 >= argc)
1044                                 usage(argv[0]);
1045                         errno = 0;
1046                         nlogcommits = strtoll(argv[++i], &p, 10);
1047                         if (argv[i][0] == '\0' || *p != '\0' ||
1048                             nlogcommits <= 0)
1049                                 usage(argv[0]);
1050                         if (errno == ERANGE && (nlogcommits == LLONG_MAX ||
1051                             nlogcommits == LLONG_MIN))
1052                                 usage(argv[0]);
1053                 }
1054         }
1055         if (!cachefile && pledge("stdio rpath wpath cpath", NULL) == -1)
1056                 err(1, "pledge");
1057         if (!repodir)
1058                 usage(argv[0]);
1059
1060         if (!realpath(repodir, repodirabs))
1061                 err(1, "realpath");
1062
1063         git_libgit2_init();
1064
1065         if (git_repository_open_ext(&repo, repodir,
1066                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1067                 e = giterr_last();
1068                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1069                 return 1;
1070         }
1071
1072         /* find HEAD */
1073         if (!git_revparse_single(&obj, repo, "HEAD"))
1074                 head = git_object_id(obj);
1075         git_object_free(obj);
1076
1077         /* use directory name as name */
1078         if ((name = strrchr(repodirabs, '/')))
1079                 name++;
1080         else
1081                 name = "";
1082
1083         /* strip .git suffix */
1084         if (!(strippedname = strdup(name)))
1085                 err(1, "strdup");
1086         if ((p = strrchr(strippedname, '.')))
1087                 if (!strcmp(p, ".git"))
1088                         *p = '\0';
1089
1090         /* read description or .git/description */
1091         joinpath(path, sizeof(path), repodir, "description");
1092         if (!(fpread = fopen(path, "r"))) {
1093                 joinpath(path, sizeof(path), repodir, ".git/description");
1094                 fpread = fopen(path, "r");
1095         }
1096         if (fpread) {
1097                 if (!fgets(description, sizeof(description), fpread))
1098                         description[0] = '\0';
1099                 fclose(fpread);
1100         }
1101
1102         /* read url or .git/url */
1103         joinpath(path, sizeof(path), repodir, "url");
1104         if (!(fpread = fopen(path, "r"))) {
1105                 joinpath(path, sizeof(path), repodir, ".git/url");
1106                 fpread = fopen(path, "r");
1107         }
1108         if (fpread) {
1109                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1110                         cloneurl[0] = '\0';
1111                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1112                 fclose(fpread);
1113         }
1114
1115         /* check LICENSE */
1116         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1117                 git_object_type(obj) == GIT_OBJ_BLOB);
1118         git_object_free(obj);
1119
1120         /* check README */
1121         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1122                 git_object_type(obj) == GIT_OBJ_BLOB);
1123         git_object_free(obj);
1124
1125         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1126                 git_object_type(obj) == GIT_OBJ_BLOB);
1127         git_object_free(obj);
1128
1129         /* log for HEAD */
1130         fp = efopen("log.html", "w");
1131         relpath = "";
1132         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1133         writeheader(fp, "Log");
1134         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1135               "<td><b>Commit message</b></td>"
1136               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1137               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1138               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1139
1140         if (cachefile && head) {
1141                 /* read from cache file (does not need to exist) */
1142                 if ((rcachefp = fopen(cachefile, "r"))) {
1143                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1144                                 errx(1, "%s: no object id", cachefile);
1145                         if (git_oid_fromstr(&lastoid, lastoidstr))
1146                                 errx(1, "%s: invalid object id", cachefile);
1147                 }
1148
1149                 /* write log to (temporary) cache */
1150                 if ((fd = mkstemp(tmppath)) == -1)
1151                         err(1, "mkstemp");
1152                 if (!(wcachefp = fdopen(fd, "w")))
1153                         err(1, "fdopen: '%s'", tmppath);
1154                 /* write last commit id (HEAD) */
1155                 git_oid_tostr(buf, sizeof(buf), head);
1156                 fprintf(wcachefp, "%s\n", buf);
1157
1158                 writelog(fp, head);
1159
1160                 if (rcachefp) {
1161                         /* append previous log to log.html and the new cache */
1162                         while (!feof(rcachefp)) {
1163                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1164                                 if (ferror(rcachefp))
1165                                         err(1, "fread");
1166                                 if (fwrite(buf, 1, n, fp) != n ||
1167                                     fwrite(buf, 1, n, wcachefp) != n)
1168                                         err(1, "fwrite");
1169                         }
1170                         fclose(rcachefp);
1171                 }
1172                 fclose(wcachefp);
1173         } else {
1174                 if (head)
1175                         writelog(fp, head);
1176         }
1177
1178         fputs("</tbody></table>", fp);
1179         writefooter(fp);
1180         fclose(fp);
1181
1182         /* files for HEAD */
1183         fp = efopen("files.html", "w");
1184         writeheader(fp, "Files");
1185         if (head)
1186                 writefiles(fp, head);
1187         writefooter(fp);
1188         fclose(fp);
1189
1190         /* summary page with branches and tags */
1191         fp = efopen("refs.html", "w");
1192         writeheader(fp, "Refs");
1193         writerefs(fp);
1194         writefooter(fp);
1195         fclose(fp);
1196
1197         /* Atom feed */
1198         fp = efopen("atom.xml", "w");
1199         writeatom(fp);
1200         fclose(fp);
1201
1202         /* rename new cache file on success */
1203         if (cachefile && head) {
1204                 if (rename(tmppath, cachefile))
1205                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1206                 umask((mask = umask(0)));
1207                 if (chmod(cachefile,
1208                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1209                         err(1, "chmod: '%s'", cachefile);
1210         }
1211
1212         /* cleanup */
1213         git_repository_free(repo);
1214         git_libgit2_shutdown();
1215
1216         return 0;
1217 }