stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <inttypes.h>
   7 #include <libgen.h>
   8 #include <limits.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13
  14 #include <git2.h>
  15
  16 #include "compat.h"
  17
  18 struct deltainfo {
  19         git_patch *patch;
  20
  21         size_t addcount;
  22         size_t delcount;
  23 };
  24
  25 struct commitinfo {
  26         const git_oid *id;
  27
  28         char oid[GIT_OID_HEXSZ + 1];
  29         char parentoid[GIT_OID_HEXSZ + 1];
  30
  31         const git_signature *author;
  32         const git_signature *committer;
  33         const char          *summary;
  34         const char          *msg;
  35
  36         git_diff   *diff;
  37         git_commit *commit;
  38         git_commit *parent;
  39         git_tree   *commit_tree;
  40         git_tree   *parent_tree;
  41
  42         size_t addcount;
  43         size_t delcount;
  44         size_t filecount;
  45
  46         struct deltainfo **deltas;
  47         size_t ndeltas;
  48 };
  49
  50 static git_repository *repo;
  51
  52 static const char *relpath = "";
  53 static const char *repodir;
  54
  55 static char *name = "";
  56 static char *strippedname = "";
  57 static char description[255];
  58 static char cloneurl[1024];
  59 static int haslicense, hasreadme, hassubmodules;
  60 static long long nlogcommits = -1; /* < 0 indicates not used */
  61
  62 /* cache */
  63 static git_oid lastoid;
  64 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + nul byte */
  65 static FILE *rcachefp, *wcachefp;
  66 static const char *cachefile;
  67
  68 void
  69 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  70 {
  71         int r;
  72
  73         r = snprintf(buf, bufsiz, "%s%s%s",
  74                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  75         if (r == -1 || (size_t)r >= bufsiz)
  76                 errx(1, "path truncated: '%s%s%s'",
  77                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  78 }
  79
  80 void
  81 deltainfo_free(struct deltainfo *di)
  82 {
  83         if (!di)
  84                 return;
  85         git_patch_free(di->patch);
  86         memset(di, 0, sizeof(*di));
  87         free(di);
  88 }
  89
  90 int
  91 commitinfo_getstats(struct commitinfo *ci)
  92 {
  93         struct deltainfo *di;
  94         git_diff_options opts;
  95         const git_diff_delta *delta;
  96         const git_diff_hunk *hunk;
  97         const git_diff_line *line;
  98         git_patch *patch = NULL;
  99         size_t ndeltas, nhunks, nhunklines;
 100         size_t i, j, k;
 101
 102         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 103                 goto err;
 104         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 105                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 106                         ci->parent = NULL;
 107                         ci->parent_tree = NULL;
 108                 }
 109         }
 110
 111         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 112         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH;
 113         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 114                 goto err;
 115
 116         ndeltas = git_diff_num_deltas(ci->diff);
 117         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 118                 err(1, "calloc");
 119
 120         for (i = 0; i < ndeltas; i++) {
 121                 if (git_patch_from_diff(&patch, ci->diff, i))
 122                         goto err;
 123                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 124                         err(1, "calloc");
 125                 di->patch = patch;
 126                 ci->deltas[i] = di;
 127
 128                 delta = git_patch_get_delta(patch);
 129
 130                 /* skip stats for binary data */
 131                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 132                         continue;
 133
 134                 nhunks = git_patch_num_hunks(patch);
 135                 for (j = 0; j < nhunks; j++) {
 136                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 137                                 break;
 138                         for (k = 0; ; k++) {
 139                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 140                                         break;
 141                                 if (line->old_lineno == -1) {
 142                                         di->addcount++;
 143                                         ci->addcount++;
 144                                 } else if (line->new_lineno == -1) {
 145                                         di->delcount++;
 146                                         ci->delcount++;
 147                                 }
 148                         }
 149                 }
 150         }
 151         ci->ndeltas = i;
 152         ci->filecount = i;
 153
 154         return 0;
 155
 156 err:
 157         git_diff_free(ci->diff);
 158         ci->diff = NULL;
 159         git_tree_free(ci->commit_tree);
 160         ci->commit_tree = NULL;
 161         git_tree_free(ci->parent_tree);
 162         ci->parent_tree = NULL;
 163         git_commit_free(ci->parent);
 164         ci->parent = NULL;
 165
 166         if (ci->deltas)
 167                 for (i = 0; i < ci->ndeltas; i++)
 168                         deltainfo_free(ci->deltas[i]);
 169         free(ci->deltas);
 170         ci->deltas = NULL;
 171         ci->ndeltas = 0;
 172         ci->addcount = 0;
 173         ci->delcount = 0;
 174         ci->filecount = 0;
 175
 176         return -1;
 177 }
 178
 179 void
 180 commitinfo_free(struct commitinfo *ci)
 181 {
 182         size_t i;
 183
 184         if (!ci)
 185                 return;
 186         if (ci->deltas)
 187                 for (i = 0; i < ci->ndeltas; i++)
 188                         deltainfo_free(ci->deltas[i]);
 189
 190         free(ci->deltas);
 191         git_diff_free(ci->diff);
 192         git_tree_free(ci->commit_tree);
 193         git_tree_free(ci->parent_tree);
 194         git_commit_free(ci->commit);
 195         git_commit_free(ci->parent);
 196         memset(ci, 0, sizeof(*ci));
 197         free(ci);
 198 }
 199
 200 struct commitinfo *
 201 commitinfo_getbyoid(const git_oid *id)
 202 {
 203         struct commitinfo *ci;
 204
 205         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 206                 err(1, "calloc");
 207
 208         if (git_commit_lookup(&(ci->commit), repo, id))
 209                 goto err;
 210         ci->id = id;
 211
 212         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 213         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 214
 215         ci->author = git_commit_author(ci->commit);
 216         ci->committer = git_commit_committer(ci->commit);
 217         ci->summary = git_commit_summary(ci->commit);
 218         ci->msg = git_commit_message(ci->commit);
 219
 220         return ci;
 221
 222 err:
 223         commitinfo_free(ci);
 224
 225         return NULL;
 226 }
 227
 228 FILE *
 229 efopen(const char *name, const char *flags)
 230 {
 231         FILE *fp;
 232
 233         if (!(fp = fopen(name, flags)))
 234                 err(1, "fopen: '%s'", name);
 235
 236         return fp;
 237 }
 238
 239 /* Escape characters below as HTML 2.0 / XML 1.0. */
 240 void
 241 xmlencode(FILE *fp, const char *s, size_t len)
 242 {
 243         size_t i;
 244
 245         for (i = 0; *s && i < len; s++, i++) {
 246                 switch(*s) {
 247                 case '<':  fputs("&lt;",   fp); break;
 248                 case '>':  fputs("&gt;",   fp); break;
 249                 case '\'': fputs("&#39;",  fp); break;
 250                 case '&':  fputs("&amp;",  fp); break;
 251                 case '"':  fputs("&quot;", fp); break;
 252                 default:   fputc(*s, fp);
 253                 }
 254         }
 255 }
 256
 257 int
 258 mkdirp(const char *path)
 259 {
 260         char tmp[PATH_MAX], *p;
 261
 262         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 263                 errx(1, "path truncated: '%s'", path);
 264         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 265                 if (*p != '/')
 266                         continue;
 267                 *p = '\0';
 268                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 269                         return -1;
 270                 *p = '/';
 271         }
 272         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 273                 return -1;
 274         return 0;
 275 }
 276
 277 void
 278 printtimez(FILE *fp, const git_time *intime)
 279 {
 280         struct tm *intm;
 281         time_t t;
 282         char out[32];
 283
 284         t = (time_t)intime->time;
 285         if (!(intm = gmtime(&t)))
 286                 return;
 287         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 288         fputs(out, fp);
 289 }
 290
 291 void
 292 printtime(FILE *fp, const git_time *intime)
 293 {
 294         struct tm *intm;
 295         time_t t;
 296         char out[32];
 297
 298         t = (time_t)intime->time + (intime->offset * 60);
 299         if (!(intm = gmtime(&t)))
 300                 return;
 301         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 302         if (intime->offset < 0)
 303                 fprintf(fp, "%s -%02d%02d", out,
 304                             -(intime->offset) / 60, -(intime->offset) % 60);
 305         else
 306                 fprintf(fp, "%s +%02d%02d", out,
 307                             intime->offset / 60, intime->offset % 60);
 308 }
 309
 310 void
 311 printtimeshort(FILE *fp, const git_time *intime)
 312 {
 313         struct tm *intm;
 314         time_t t;
 315         char out[32];
 316
 317         t = (time_t)intime->time;
 318         if (!(intm = gmtime(&t)))
 319                 return;
 320         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 321         fputs(out, fp);
 322 }
 323
 324 void
 325 writeheader(FILE *fp, const char *title)
 326 {
 327         fputs("<!DOCTYPE html>\n"
 328                 "<html>\n<head>\n"
 329                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 330                 "<title>", fp);
 331         xmlencode(fp, title, strlen(title));
 332         if (title[0] && strippedname[0])
 333                 fputs(" - ", fp);
 334         xmlencode(fp, strippedname, strlen(strippedname));
 335         if (description[0])
 336                 fputs(" - ", fp);
 337         xmlencode(fp, description, strlen(description));
 338         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 339         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 340                 name, relpath);
 341         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 342         fputs("</head>\n<body>\n<table><tr><td>", fp);
 343         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 344                 relpath, relpath);
 345         fputs("</td><td><h1>", fp);
 346         xmlencode(fp, strippedname, strlen(strippedname));
 347         fputs("</h1><span class=\"desc\">", fp);
 348         xmlencode(fp, description, strlen(description));
 349         fputs("</span></td></tr>", fp);
 350         if (cloneurl[0]) {
 351                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 352                 xmlencode(fp, cloneurl, strlen(cloneurl));
 353                 fputs("\">", fp);
 354                 xmlencode(fp, cloneurl, strlen(cloneurl));
 355                 fputs("</a></td></tr>", fp);
 356         }
 357         fputs("<tr><td></td><td>\n", fp);
 358         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 359         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 360         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 361         if (hassubmodules)
 362                 fprintf(fp, " | <a href=\"%sfile/.gitmodules.html\">Submodules</a>", relpath);
 363         if (hasreadme)
 364                 fprintf(fp, " | <a href=\"%sfile/README.html\">README</a>", relpath);
 365         if (haslicense)
 366                 fprintf(fp, " | <a href=\"%sfile/LICENSE.html\">LICENSE</a>", relpath);
 367         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 368 }
 369
 370 void
 371 writefooter(FILE *fp)
 372 {
 373         fputs("</div>\n</body>\n</html>\n", fp);
 374 }
 375
 376 int
 377 writeblobhtml(FILE *fp, const git_blob *blob)
 378 {
 379         size_t n = 0, i, prev;
 380         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 381         const char *s = git_blob_rawcontent(blob);
 382         git_off_t len = git_blob_rawsize(blob);
 383
 384         fputs("<pre id=\"blob\">\n", fp);
 385
 386         if (len > 0) {
 387                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 388                         if (s[i] != '\n')
 389                                 continue;
 390                         n++;
 391                         fprintf(fp, nfmt, n, n, n);
 392                         xmlencode(fp, &s[prev], i - prev + 1);
 393                         prev = i + 1;
 394                 }
 395                 /* trailing data */
 396                 if ((len - prev) > 0) {
 397                         n++;
 398                         fprintf(fp, nfmt, n, n, n);
 399                         xmlencode(fp, &s[prev], len - prev);
 400                 }
 401         }
 402
 403         fputs("</pre>\n", fp);
 404
 405         return n;
 406 }
 407
 408 void
 409 printcommit(FILE *fp, struct commitinfo *ci)
 410 {
 411         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 412                 relpath, ci->oid, ci->oid);
 413
 414         if (ci->parentoid[0])
 415                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 416                         relpath, ci->parentoid, ci->parentoid);
 417
 418         if (ci->author) {
 419                 fputs("<b>Author:</b> ", fp);
 420                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 421                 fputs(" &lt;<a href=\"mailto:", fp);
 422                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 423                 fputs("\">", fp);
 424                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 425                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 426                 printtime(fp, &(ci->author->when));
 427                 fputc('\n', fp);
 428         }
 429         if (ci->msg) {
 430                 fputc('\n', fp);
 431                 xmlencode(fp, ci->msg, strlen(ci->msg));
 432                 fputc('\n', fp);
 433         }
 434 }
 435
 436 void
 437 printshowfile(FILE *fp, struct commitinfo *ci)
 438 {
 439         const git_diff_delta *delta;
 440         const git_diff_hunk *hunk;
 441         const git_diff_line *line;
 442         git_patch *patch;
 443         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 444         char linestr[80];
 445
 446         printcommit(fp, ci);
 447
 448         if (!ci->deltas)
 449                 return;
 450
 451         if (ci->filecount > 1000   ||
 452             ci->ndeltas   > 1000   ||
 453             ci->addcount  > 100000 ||
 454             ci->delcount  > 100000) {
 455                 fputs("Diff is too large, output suppressed.\n", fp);
 456                 return;
 457         }
 458
 459         /* diff stat */
 460         fputs("<b>Diffstat:</b>\n<table>", fp);
 461         for (i = 0; i < ci->ndeltas; i++) {
 462                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 463                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 464                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 465                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 466                         fputs(" -&gt; ", fp);
 467                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 468                 }
 469
 470                 add = ci->deltas[i]->addcount;
 471                 del = ci->deltas[i]->delcount;
 472                 changed = add + del;
 473                 total = sizeof(linestr) - 2;
 474                 if (changed > total) {
 475                         if (add)
 476                                 add = ((float)total / changed * add) + 1;
 477                         if (del)
 478                                 del = ((float)total / changed * del) + 1;
 479                 }
 480                 memset(&linestr, '+', add);
 481                 memset(&linestr[add], '-', del);
 482
 483                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 484                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 485                 fwrite(&linestr, 1, add, fp);
 486                 fputs("</span><span class=\"d\">", fp);
 487                 fwrite(&linestr[add], 1, del, fp);
 488                 fputs("</span></td></tr>\n", fp);
 489         }
 490         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 491                 ci->filecount, ci->filecount == 1 ? "" : "s",
 492                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 493                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 494
 495         fputs("<hr/>", fp);
 496
 497         for (i = 0; i < ci->ndeltas; i++) {
 498                 patch = ci->deltas[i]->patch;
 499                 delta = git_patch_get_delta(patch);
 500                 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",
 501                         i, relpath, delta->old_file.path, delta->old_file.path,
 502                         relpath, delta->new_file.path, delta->new_file.path);
 503
 504                 /* check binary data */
 505                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 506                         fputs("Binary files differ.\n", fp);
 507                         continue;
 508                 }
 509
 510                 nhunks = git_patch_num_hunks(patch);
 511                 for (j = 0; j < nhunks; j++) {
 512                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 513                                 break;
 514
 515                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 516                         xmlencode(fp, hunk->header, hunk->header_len);
 517                         fputs("</a>", fp);
 518
 519                         for (k = 0; ; k++) {
 520                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 521                                         break;
 522                                 if (line->old_lineno == -1)
 523                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 524                                                 i, j, k, i, j, k);
 525                                 else if (line->new_lineno == -1)
 526                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 527                                                 i, j, k, i, j, k);
 528                                 else
 529                                         fputc(' ', fp);
 530                                 xmlencode(fp, line->content, line->content_len);
 531                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 532                                         fputs("</a>", fp);
 533                         }
 534                 }
 535         }
 536 }
 537
 538 void
 539 writelogline(FILE *fp, struct commitinfo *ci)
 540 {
 541         fputs("<tr><td>", fp);
 542         if (ci->author)
 543                 printtimeshort(fp, &(ci->author->when));
 544         fputs("</td><td>", fp);
 545         if (ci->summary) {
 546                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 547                 xmlencode(fp, ci->summary, strlen(ci->summary));
 548                 fputs("</a>", fp);
 549         }
 550         fputs("</td><td>", fp);
 551         if (ci->author)
 552                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 553         fputs("</td><td class=\"num\" align=\"right\">", fp);
 554         fprintf(fp, "%zu", ci->filecount);
 555         fputs("</td><td class=\"num\" align=\"right\">", fp);
 556         fprintf(fp, "+%zu", ci->addcount);
 557         fputs("</td><td class=\"num\" align=\"right\">", fp);
 558         fprintf(fp, "-%zu", ci->delcount);
 559         fputs("</td></tr>\n", fp);
 560 }
 561
 562 int
 563 writelog(FILE *fp, const git_oid *oid)
 564 {
 565         struct commitinfo *ci;
 566         git_revwalk *w = NULL;
 567         git_oid id;
 568         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 569         FILE *fpfile;
 570         int r;
 571
 572         git_revwalk_new(&w, repo);
 573         git_revwalk_push(w, oid);
 574         git_revwalk_sorting(w, GIT_SORT_TIME);
 575         git_revwalk_simplify_first_parent(w);
 576
 577         while (!git_revwalk_next(&id, w)) {
 578                 relpath = "";
 579
 580                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 581                         break;
 582
 583                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 584                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 585                 if (r == -1 || (size_t)r >= sizeof(path))
 586                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 587                 r = access(path, F_OK);
 588
 589                 /* optimization: if there are no log lines to write and
 590                    the commit file already exists: skip the diffstat */
 591                 if (!nlogcommits && !r)
 592                         continue;
 593
 594                 if (!(ci = commitinfo_getbyoid(&id)))
 595                         break;
 596                 /* diffstat: for stagit HTML required for the log.html line */
 597                 if (commitinfo_getstats(ci) == -1)
 598                         goto err;
 599
 600                 if (nlogcommits < 0) {
 601                         writelogline(fp, ci);
 602                 } else if (nlogcommits > 0) {
 603                         writelogline(fp, ci);
 604                         nlogcommits--;
 605                 }
 606
 607                 if (cachefile)
 608                         writelogline(wcachefp, ci);
 609
 610                 /* check if file exists if so skip it */
 611                 if (r) {
 612                         relpath = "../";
 613                         fpfile = efopen(path, "w");
 614                         writeheader(fpfile, ci->summary);
 615                         fputs("<pre>", fpfile);
 616                         printshowfile(fpfile, ci);
 617                         fputs("</pre>\n", fpfile);
 618                         writefooter(fpfile);
 619                         fclose(fpfile);
 620                 }
 621 err:
 622                 commitinfo_free(ci);
 623         }
 624         git_revwalk_free(w);
 625
 626         relpath = "";
 627
 628         return 0;
 629 }
 630
 631 void
 632 printcommitatom(FILE *fp, struct commitinfo *ci)
 633 {
 634         fputs("<entry>\n", fp);
 635
 636         fprintf(fp, "<id>%s</id>\n", ci->oid);
 637         if (ci->author) {
 638                 fputs("<published>", fp);
 639                 printtimez(fp, &(ci->author->when));
 640                 fputs("</published>\n", fp);
 641         }
 642         if (ci->committer) {
 643                 fputs("<updated>", fp);
 644                 printtimez(fp, &(ci->committer->when));
 645                 fputs("</updated>\n", fp);
 646         }
 647         if (ci->summary) {
 648                 fputs("<title type=\"text\">", fp);
 649                 xmlencode(fp, ci->summary, strlen(ci->summary));
 650                 fputs("</title>\n", fp);
 651         }
 652         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 653                 ci->oid);
 654
 655         if (ci->author) {
 656                 fputs("<author><name>", fp);
 657                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 658                 fputs("</name>\n<email>", fp);
 659                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 660                 fputs("</email>\n</author>\n", fp);
 661         }
 662
 663         fputs("<content type=\"text\">", fp);
 664         fprintf(fp, "commit %s\n", ci->oid);
 665         if (ci->parentoid[0])
 666                 fprintf(fp, "parent %s\n", ci->parentoid);
 667         if (ci->author) {
 668                 fputs("Author: ", fp);
 669                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 670                 fputs(" &lt;", fp);
 671                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 672                 fputs("&gt;\nDate:   ", fp);
 673                 printtime(fp, &(ci->author->when));
 674                 fputc('\n', fp);
 675         }
 676         if (ci->msg) {
 677                 fputc('\n', fp);
 678                 xmlencode(fp, ci->msg, strlen(ci->msg));
 679         }
 680         fputs("\n</content>\n</entry>\n", fp);
 681 }
 682
 683 int
 684 writeatom(FILE *fp)
 685 {
 686         struct commitinfo *ci;
 687         git_revwalk *w = NULL;
 688         git_oid id;
 689         size_t i, m = 100; /* last 'm' commits */
 690
 691         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 692               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 693         xmlencode(fp, strippedname, strlen(strippedname));
 694         fputs(", branch HEAD</title>\n<subtitle>", fp);
 695         xmlencode(fp, description, strlen(description));
 696         fputs("</subtitle>\n", fp);
 697
 698         git_revwalk_new(&w, repo);
 699         git_revwalk_push_head(w);
 700         git_revwalk_sorting(w, GIT_SORT_TIME);
 701         git_revwalk_simplify_first_parent(w);
 702
 703         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 704                 if (!(ci = commitinfo_getbyoid(&id)))
 705                         break;
 706                 printcommitatom(fp, ci);
 707                 commitinfo_free(ci);
 708         }
 709         git_revwalk_free(w);
 710
 711         fputs("</feed>\n", fp);
 712
 713         return 0;
 714 }
 715
 716 int
 717 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 718 {
 719         char tmp[PATH_MAX] = "", *d;
 720         const char *p;
 721         int lc = 0;
 722         FILE *fp;
 723
 724         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 725                 errx(1, "path truncated: '%s'", fpath);
 726         if (!(d = dirname(tmp)))
 727                 err(1, "dirname");
 728         if (mkdirp(d))
 729                 return -1;
 730
 731         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 732                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 733                         errx(1, "path truncated: '../%s'", tmp);
 734         }
 735         relpath = tmp;
 736
 737         fp = efopen(fpath, "w");
 738         writeheader(fp, filename);
 739         fputs("<p> ", fp);
 740         xmlencode(fp, filename, strlen(filename));
 741         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 742         fputs("</p><hr/>", fp);
 743
 744         if (git_blob_is_binary((git_blob *)obj)) {
 745                 fputs("<p>Binary file.</p>\n", fp);
 746         } else {
 747                 lc = writeblobhtml(fp, (git_blob *)obj);
 748                 if (ferror(fp))
 749                         err(1, "fwrite");
 750         }
 751         writefooter(fp);
 752         fclose(fp);
 753
 754         relpath = "";
 755
 756         return lc;
 757 }
 758
 759 const char *
 760 filemode(git_filemode_t m)
 761 {
 762         static char mode[11];
 763
 764         memset(mode, '-', sizeof(mode) - 1);
 765         mode[10] = '\0';
 766
 767         if (S_ISREG(m))
 768                 mode[0] = '-';
 769         else if (S_ISBLK(m))
 770                 mode[0] = 'b';
 771         else if (S_ISCHR(m))
 772                 mode[0] = 'c';
 773         else if (S_ISDIR(m))
 774                 mode[0] = 'd';
 775         else if (S_ISFIFO(m))
 776                 mode[0] = 'p';
 777         else if (S_ISLNK(m))
 778                 mode[0] = 'l';
 779         else if (S_ISSOCK(m))
 780                 mode[0] = 's';
 781         else
 782                 mode[0] = '?';
 783
 784         if (m & S_IRUSR) mode[1] = 'r';
 785         if (m & S_IWUSR) mode[2] = 'w';
 786         if (m & S_IXUSR) mode[3] = 'x';
 787         if (m & S_IRGRP) mode[4] = 'r';
 788         if (m & S_IWGRP) mode[5] = 'w';
 789         if (m & S_IXGRP) mode[6] = 'x';
 790         if (m & S_IROTH) mode[7] = 'r';
 791         if (m & S_IWOTH) mode[8] = 'w';
 792         if (m & S_IXOTH) mode[9] = 'x';
 793
 794         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 795         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 796         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 797
 798         return mode;
 799 }
 800
 801 int
 802 writefilestree(FILE *fp, git_tree *tree, const char *path)
 803 {
 804         const git_tree_entry *entry = NULL;
 805         git_submodule *module = NULL;
 806         git_object *obj = NULL;
 807         git_off_t filesize;
 808         const char *entryname;
 809         char filepath[PATH_MAX], entrypath[PATH_MAX];
 810         size_t count, i;
 811         int lc, r, ret;
 812
 813         count = git_tree_entrycount(tree);
 814         for (i = 0; i < count; i++) {
 815                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 816                     !(entryname = git_tree_entry_name(entry)))
 817                         return -1;
 818                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 819
 820                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 821                          entrypath);
 822                 if (r == -1 || (size_t)r >= sizeof(filepath))
 823                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 824
 825                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 826                         switch (git_object_type(obj)) {
 827                         case GIT_OBJ_BLOB:
 828                                 break;
 829                         case GIT_OBJ_TREE:
 830                                 /* NOTE: recurses */
 831                                 ret = writefilestree(fp, (git_tree *)obj,
 832                                                      entrypath);
 833                                 git_object_free(obj);
 834                                 if (ret)
 835                                         return ret;
 836                                 continue;
 837                         default:
 838                                 git_object_free(obj);
 839                                 continue;
 840                         }
 841
 842                         filesize = git_blob_rawsize((git_blob *)obj);
 843                         lc = writeblob(obj, filepath, entryname, filesize);
 844
 845                         fputs("<tr><td>", fp);
 846                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 847                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 848                         xmlencode(fp, entrypath, strlen(entrypath));
 849                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 850                         if (lc > 0)
 851                                 fprintf(fp, "%dL", lc);
 852                         else
 853                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 854                         fputs("</td></tr>\n", fp);
 855                         git_object_free(obj);
 856                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 857                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 858                                 relpath);
 859                         xmlencode(fp, entrypath, strlen(entrypath));
 860                         git_submodule_free(module);
 861                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 862                 }
 863         }
 864
 865         return 0;
 866 }
 867
 868 int
 869 writefiles(FILE *fp, const git_oid *id)
 870 {
 871         git_tree *tree = NULL;
 872         git_commit *commit = NULL;
 873         int ret = -1;
 874
 875         fputs("<table id=\"files\"><thead>\n<tr>"
 876               "<td><b>Mode</b></td><td><b>Name</b></td>"
 877               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 878               "</tr>\n</thead><tbody>\n", fp);
 879
 880         if (!git_commit_lookup(&commit, repo, id) &&
 881             !git_commit_tree(&tree, commit))
 882                 ret = writefilestree(fp, tree, "");
 883
 884         fputs("</tbody></table>", fp);
 885
 886         git_commit_free(commit);
 887         git_tree_free(tree);
 888
 889         return ret;
 890 }
 891
 892 int
 893 refs_cmp(const void *v1, const void *v2)
 894 {
 895         git_reference *r1 = (*(git_reference **)v1);
 896         git_reference *r2 = (*(git_reference **)v2);
 897         int r;
 898
 899         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 900                 return r;
 901
 902         return strcmp(git_reference_shorthand(r1),
 903                       git_reference_shorthand(r2));
 904 }
 905
 906 int
 907 writerefs(FILE *fp)
 908 {
 909         struct commitinfo *ci;
 910         const git_oid *id = NULL;
 911         git_object *obj = NULL;
 912         git_reference *dref = NULL, *r, *ref = NULL;
 913         git_reference_iterator *it = NULL;
 914         git_reference **refs = NULL;
 915         size_t count, i, j, refcount;
 916         const char *titles[] = { "Branches", "Tags" };
 917         const char *ids[] = { "branches", "tags" };
 918         const char *name;
 919
 920         if (git_reference_iterator_new(&it, repo))
 921                 return -1;
 922
 923         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 924                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 925                         err(1, "realloc");
 926                 refs[refcount] = ref;
 927         }
 928         git_reference_iterator_free(it);
 929
 930         /* sort by type then shorthand name */
 931         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 932
 933         for (j = 0; j < 2; j++) {
 934                 for (i = 0, count = 0; i < refcount; i++) {
 935                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 936                             !(git_reference_is_tag(refs[i]) && j == 1))
 937                                 continue;
 938
 939                         switch (git_reference_type(refs[i])) {
 940                         case GIT_REF_SYMBOLIC:
 941                                 if (git_reference_resolve(&dref, refs[i]))
 942                                         goto err;
 943                                 r = dref;
 944                                 break;
 945                         case GIT_REF_OID:
 946                                 r = refs[i];
 947                                 break;
 948                         default:
 949                                 continue;
 950                         }
 951                         if (!git_reference_target(r) ||
 952                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 953                                 goto err;
 954                         if (!(id = git_object_id(obj)))
 955                                 goto err;
 956                         if (!(ci = commitinfo_getbyoid(id)))
 957                                 break;
 958
 959                         /* print header if it has an entry (first). */
 960                         if (++count == 1) {
 961                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 962                                         "<thead>\n<tr><td><b>Name</b></td>"
 963                                         "<td><b>Last commit date</b></td>"
 964                                         "<td><b>Author</b></td>\n</tr>\n"
 965                                         "</thead><tbody>\n",
 966                                          titles[j], ids[j]);
 967                         }
 968
 969                         relpath = "";
 970                         name = git_reference_shorthand(r);
 971
 972                         fputs("<tr><td>", fp);
 973                         xmlencode(fp, name, strlen(name));
 974                         fputs("</td><td>", fp);
 975                         if (ci->author)
 976                                 printtimeshort(fp, &(ci->author->when));
 977                         fputs("</td><td>", fp);
 978                         if (ci->author)
 979                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 980                         fputs("</td></tr>\n", fp);
 981
 982                         relpath = "../";
 983
 984                         commitinfo_free(ci);
 985                         git_object_free(obj);
 986                         obj = NULL;
 987                         git_reference_free(dref);
 988                         dref = NULL;
 989                 }
 990                 /* table footer */
 991                 if (count)
 992                         fputs("</tbody></table><br/>", fp);
 993         }
 994
 995 err:
 996         git_object_free(obj);
 997         git_reference_free(dref);
 998
 999         for (i = 0; i < refcount; i++)
1000                 git_reference_free(refs[i]);
1001         free(refs);
1002
1003         return 0;
1004 }
1005
1006 void
1007 usage(char *argv0)
1008 {
1009         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1010         exit(1);
1011 }
1012
1013 int
1014 main(int argc, char *argv[])
1015 {
1016         git_object *obj = NULL;
1017         const git_oid *head = NULL;
1018         const git_error *e = NULL;
1019         mode_t mask;
1020         FILE *fp, *fpread;
1021         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1022         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1023         size_t n;
1024         int i, fd;
1025
1026         for (i = 1; i < argc; i++) {
1027                 if (argv[i][0] != '-') {
1028                         if (repodir)
1029                                 usage(argv[0]);
1030                         repodir = argv[i];
1031                 } else if (argv[i][1] == 'c') {
1032                         if (nlogcommits > 0 || i + 1 >= argc)
1033                                 usage(argv[0]);
1034                         cachefile = argv[++i];
1035                 } else if (argv[i][1] == 'l') {
1036                         if (cachefile || i + 1 >= argc)
1037                                 usage(argv[0]);
1038                         errno = 0;
1039                         nlogcommits = strtoll(argv[++i], &p, 10);
1040                         if (argv[i][0] == '\0' || *p != '\0' ||
1041                             nlogcommits <= 0)
1042                                 usage(argv[0]);
1043                         if (errno == ERANGE && (nlogcommits == LLONG_MAX ||
1044                             nlogcommits == LLONG_MIN))
1045                                 usage(argv[0]);
1046                 }
1047         }
1048         if (!repodir)
1049                 usage(argv[0]);
1050
1051         if (!realpath(repodir, repodirabs))
1052                 err(1, "realpath");
1053
1054         git_libgit2_init();
1055
1056 #ifdef __OpenBSD__
1057         if (cachefile) {
1058                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1059                         err(1, "pledge");
1060         } else {
1061                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1062                         err(1, "pledge");
1063         }
1064 #endif
1065
1066         if (git_repository_open_ext(&repo, repodir,
1067                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1068                 e = giterr_last();
1069                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1070                 return 1;
1071         }
1072
1073         /* find HEAD */
1074         if (!git_revparse_single(&obj, repo, "HEAD"))
1075                 head = git_object_id(obj);
1076         git_object_free(obj);
1077
1078         /* use directory name as name */
1079         if ((name = strrchr(repodirabs, '/')))
1080                 name++;
1081         else
1082                 name = "";
1083
1084         /* strip .git suffix */
1085         if (!(strippedname = strdup(name)))
1086                 err(1, "strdup");
1087         if ((p = strrchr(strippedname, '.')))
1088                 if (!strcmp(p, ".git"))
1089                         *p = '\0';
1090
1091         /* read description or .git/description */
1092         joinpath(path, sizeof(path), repodir, "description");
1093         if (!(fpread = fopen(path, "r"))) {
1094                 joinpath(path, sizeof(path), repodir, ".git/description");
1095                 fpread = fopen(path, "r");
1096         }
1097         if (fpread) {
1098                 if (!fgets(description, sizeof(description), fpread))
1099                         description[0] = '\0';
1100                 fclose(fpread);
1101         }
1102
1103         /* read url or .git/url */
1104         joinpath(path, sizeof(path), repodir, "url");
1105         if (!(fpread = fopen(path, "r"))) {
1106                 joinpath(path, sizeof(path), repodir, ".git/url");
1107                 fpread = fopen(path, "r");
1108         }
1109         if (fpread) {
1110                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1111                         cloneurl[0] = '\0';
1112                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1113                 fclose(fpread);
1114         }
1115
1116         /* check LICENSE */
1117         haslicense = (!git_revparse_single(&obj, repo, "HEAD:LICENSE") &&
1118                 git_object_type(obj) == GIT_OBJ_BLOB);
1119         git_object_free(obj);
1120
1121         /* check README */
1122         hasreadme = (!git_revparse_single(&obj, repo, "HEAD:README") &&
1123                 git_object_type(obj) == GIT_OBJ_BLOB);
1124         git_object_free(obj);
1125
1126         hassubmodules = (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1127                 git_object_type(obj) == GIT_OBJ_BLOB);
1128         git_object_free(obj);
1129
1130         /* log for HEAD */
1131         fp = efopen("log.html", "w");
1132         relpath = "";
1133         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1134         writeheader(fp, "Log");
1135         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1136               "<td><b>Commit message</b></td>"
1137               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1138               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1139               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1140
1141         if (cachefile && head) {
1142                 /* read from cache file (does not need to exist) */
1143                 if ((rcachefp = fopen(cachefile, "r"))) {
1144                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1145                                 errx(1, "%s: no object id", cachefile);
1146                         if (git_oid_fromstr(&lastoid, lastoidstr))
1147                                 errx(1, "%s: invalid object id", cachefile);
1148                 }
1149
1150                 /* write log to (temporary) cache */
1151                 if ((fd = mkstemp(tmppath)) == -1)
1152                         err(1, "mkstemp");
1153                 if (!(wcachefp = fdopen(fd, "w")))
1154                         err(1, "fdopen: '%s'", tmppath);
1155                 /* write last commit id (HEAD) */
1156                 git_oid_tostr(buf, sizeof(buf), head);
1157                 fprintf(wcachefp, "%s\n", buf);
1158
1159                 writelog(fp, head);
1160
1161                 if (rcachefp) {
1162                         /* append previous log to log.html and the new cache */
1163                         while (!feof(rcachefp)) {
1164                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1165                                 if (ferror(rcachefp))
1166                                         err(1, "fread");
1167                                 if (fwrite(buf, 1, n, fp) != n ||
1168                                     fwrite(buf, 1, n, wcachefp) != n)
1169                                         err(1, "fwrite");
1170                         }
1171                         fclose(rcachefp);
1172                 }
1173                 fclose(wcachefp);
1174         } else {
1175                 if (head)
1176                         writelog(fp, head);
1177         }
1178
1179         fputs("</tbody></table>", fp);
1180         writefooter(fp);
1181         fclose(fp);
1182
1183         /* files for HEAD */
1184         fp = efopen("files.html", "w");
1185         writeheader(fp, "Files");
1186         if (head)
1187                 writefiles(fp, head);
1188         writefooter(fp);
1189         fclose(fp);
1190
1191         /* summary page with branches and tags */
1192         fp = efopen("refs.html", "w");
1193         writeheader(fp, "Refs");
1194         writerefs(fp);
1195         writefooter(fp);
1196         fclose(fp);
1197
1198         /* Atom feed */
1199         fp = efopen("atom.xml", "w");
1200         writeatom(fp);
1201         fclose(fp);
1202
1203         /* rename new cache file on success */
1204         if (cachefile && head) {
1205                 if (rename(tmppath, cachefile))
1206                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1207                 umask((mask = umask(0)));
1208                 if (chmod(cachefile,
1209                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1210                         err(1, "chmod: '%s'", cachefile);
1211         }
1212
1213         /* cleanup */
1214         git_repository_free(repo);
1215         git_libgit2_shutdown();
1216
1217         return 0;
1218 }