stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <inttypes.h>
   7 #include <libgen.h>
   8 #include <limits.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13
  14 #include <git2.h>
  15
  16 #include "compat.h"
  17
  18 struct deltainfo {
  19         git_patch *patch;
  20
  21         size_t addcount;
  22         size_t delcount;
  23 };
  24
  25 struct commitinfo {
  26         const git_oid *id;
  27
  28         char oid[GIT_OID_HEXSZ + 1];
  29         char parentoid[GIT_OID_HEXSZ + 1];
  30
  31         const git_signature *author;
  32         const git_signature *committer;
  33         const char          *summary;
  34         const char          *msg;
  35
  36         git_diff   *diff;
  37         git_commit *commit;
  38         git_commit *parent;
  39         git_tree   *commit_tree;
  40         git_tree   *parent_tree;
  41
  42         size_t addcount;
  43         size_t delcount;
  44         size_t filecount;
  45
  46         struct deltainfo **deltas;
  47         size_t ndeltas;
  48 };
  49
  50 static git_repository *repo;
  51
  52 static const char *relpath = "";
  53 static const char *repodir;
  54
  55 static char *name = "";
  56 static char *strippedname = "";
  57 static char description[255];
  58 static char cloneurl[1024];
  59 static char *submodules;
  60 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
  61 static char *license;
  62 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
  63 static char *readme;
  64 static long long nlogcommits = -1; /* < 0 indicates not used */
  65
  66 /* cache */
  67 static git_oid lastoid;
  68 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  69 static FILE *rcachefp, *wcachefp;
  70 static const char *cachefile;
  71
  72 void
  73 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  74 {
  75         int r;
  76
  77         r = snprintf(buf, bufsiz, "%s%s%s",
  78                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  79         if (r == -1 || (size_t)r >= bufsiz)
  80                 errx(1, "path truncated: '%s%s%s'",
  81                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  82 }
  83
  84 void
  85 deltainfo_free(struct deltainfo *di)
  86 {
  87         if (!di)
  88                 return;
  89         git_patch_free(di->patch);
  90         memset(di, 0, sizeof(*di));
  91         free(di);
  92 }
  93
  94 int
  95 commitinfo_getstats(struct commitinfo *ci)
  96 {
  97         struct deltainfo *di;
  98         git_diff_options opts;
  99         git_diff_find_options fopts;
 100         const git_diff_delta *delta;
 101         const git_diff_hunk *hunk;
 102         const git_diff_line *line;
 103         git_patch *patch = NULL;
 104         size_t ndeltas, nhunks, nhunklines;
 105         size_t i, j, k;
 106
 107         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 108                 goto err;
 109         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 110                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 111                         ci->parent = NULL;
 112                         ci->parent_tree = NULL;
 113                 }
 114         }
 115
 116         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 117         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 118                       GIT_DIFF_IGNORE_SUBMODULES |
 119                       GIT_DIFF_INCLUDE_TYPECHANGE;
 120         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 121                 goto err;
 122
 123         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 124                 goto err;
 125         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES;
 126         if (git_diff_find_similar(ci->diff, &fopts))
 127                 goto err;
 128
 129         ndeltas = git_diff_num_deltas(ci->diff);
 130         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 131                 err(1, "calloc");
 132
 133         for (i = 0; i < ndeltas; i++) {
 134                 if (git_patch_from_diff(&patch, ci->diff, i))
 135                         goto err;
 136
 137                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 138                         err(1, "calloc");
 139                 di->patch = patch;
 140                 ci->deltas[i] = di;
 141
 142                 delta = git_patch_get_delta(patch);
 143
 144                 /* skip stats for binary data */
 145                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 146                         continue;
 147
 148                 nhunks = git_patch_num_hunks(patch);
 149                 for (j = 0; j < nhunks; j++) {
 150                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 151                                 break;
 152                         for (k = 0; ; k++) {
 153                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 154                                         break;
 155                                 if (line->old_lineno == -1) {
 156                                         di->addcount++;
 157                                         ci->addcount++;
 158                                 } else if (line->new_lineno == -1) {
 159                                         di->delcount++;
 160                                         ci->delcount++;
 161                                 }
 162                         }
 163                 }
 164         }
 165         ci->ndeltas = i;
 166         ci->filecount = i;
 167
 168         return 0;
 169
 170 err:
 171         git_diff_free(ci->diff);
 172         ci->diff = NULL;
 173         git_tree_free(ci->commit_tree);
 174         ci->commit_tree = NULL;
 175         git_tree_free(ci->parent_tree);
 176         ci->parent_tree = NULL;
 177         git_commit_free(ci->parent);
 178         ci->parent = NULL;
 179
 180         if (ci->deltas)
 181                 for (i = 0; i < ci->ndeltas; i++)
 182                         deltainfo_free(ci->deltas[i]);
 183         free(ci->deltas);
 184         ci->deltas = NULL;
 185         ci->ndeltas = 0;
 186         ci->addcount = 0;
 187         ci->delcount = 0;
 188         ci->filecount = 0;
 189
 190         return -1;
 191 }
 192
 193 void
 194 commitinfo_free(struct commitinfo *ci)
 195 {
 196         size_t i;
 197
 198         if (!ci)
 199                 return;
 200         if (ci->deltas)
 201                 for (i = 0; i < ci->ndeltas; i++)
 202                         deltainfo_free(ci->deltas[i]);
 203
 204         free(ci->deltas);
 205         git_diff_free(ci->diff);
 206         git_tree_free(ci->commit_tree);
 207         git_tree_free(ci->parent_tree);
 208         git_commit_free(ci->commit);
 209         git_commit_free(ci->parent);
 210         memset(ci, 0, sizeof(*ci));
 211         free(ci);
 212 }
 213
 214 struct commitinfo *
 215 commitinfo_getbyoid(const git_oid *id)
 216 {
 217         struct commitinfo *ci;
 218
 219         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 220                 err(1, "calloc");
 221
 222         if (git_commit_lookup(&(ci->commit), repo, id))
 223                 goto err;
 224         ci->id = id;
 225
 226         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 227         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 228
 229         ci->author = git_commit_author(ci->commit);
 230         ci->committer = git_commit_committer(ci->commit);
 231         ci->summary = git_commit_summary(ci->commit);
 232         ci->msg = git_commit_message(ci->commit);
 233
 234         return ci;
 235
 236 err:
 237         commitinfo_free(ci);
 238
 239         return NULL;
 240 }
 241
 242 FILE *
 243 efopen(const char *name, const char *flags)
 244 {
 245         FILE *fp;
 246
 247         if (!(fp = fopen(name, flags)))
 248                 err(1, "fopen: '%s'", name);
 249
 250         return fp;
 251 }
 252
 253 /* Escape characters below as HTML 2.0 / XML 1.0. */
 254 void
 255 xmlencode(FILE *fp, const char *s, size_t len)
 256 {
 257         size_t i;
 258
 259         for (i = 0; *s && i < len; s++, i++) {
 260                 switch(*s) {
 261                 case '<':  fputs("&lt;",   fp); break;
 262                 case '>':  fputs("&gt;",   fp); break;
 263                 case '\'': fputs("&#39;",  fp); break;
 264                 case '&':  fputs("&amp;",  fp); break;
 265                 case '"':  fputs("&quot;", fp); break;
 266                 default:   fputc(*s, fp);
 267                 }
 268         }
 269 }
 270
 271 int
 272 mkdirp(const char *path)
 273 {
 274         char tmp[PATH_MAX], *p;
 275
 276         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 277                 errx(1, "path truncated: '%s'", path);
 278         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 279                 if (*p != '/')
 280                         continue;
 281                 *p = '\0';
 282                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 283                         return -1;
 284                 *p = '/';
 285         }
 286         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 287                 return -1;
 288         return 0;
 289 }
 290
 291 void
 292 printtimez(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;
 299         if (!(intm = gmtime(&t)))
 300                 return;
 301         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 302         fputs(out, fp);
 303 }
 304
 305 void
 306 printtime(FILE *fp, const git_time *intime)
 307 {
 308         struct tm *intm;
 309         time_t t;
 310         char out[32];
 311
 312         t = (time_t)intime->time + (intime->offset * 60);
 313         if (!(intm = gmtime(&t)))
 314                 return;
 315         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 316         if (intime->offset < 0)
 317                 fprintf(fp, "%s -%02d%02d", out,
 318                             -(intime->offset) / 60, -(intime->offset) % 60);
 319         else
 320                 fprintf(fp, "%s +%02d%02d", out,
 321                             intime->offset / 60, intime->offset % 60);
 322 }
 323
 324 void
 325 printtimeshort(FILE *fp, const git_time *intime)
 326 {
 327         struct tm *intm;
 328         time_t t;
 329         char out[32];
 330
 331         t = (time_t)intime->time;
 332         if (!(intm = gmtime(&t)))
 333                 return;
 334         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 335         fputs(out, fp);
 336 }
 337
 338 void
 339 writeheader(FILE *fp, const char *title)
 340 {
 341         fputs("<!DOCTYPE html>\n"
 342                 "<html>\n<head>\n"
 343                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 344                 "<title>", fp);
 345         xmlencode(fp, title, strlen(title));
 346         if (title[0] && strippedname[0])
 347                 fputs(" - ", fp);
 348         xmlencode(fp, strippedname, strlen(strippedname));
 349         if (description[0])
 350                 fputs(" - ", fp);
 351         xmlencode(fp, description, strlen(description));
 352         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 353         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 354                 name, relpath);
 355         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 356         fputs("</head>\n<body>\n<table><tr><td>", fp);
 357         fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 358                 relpath, relpath);
 359         fputs("</td><td><h1>", fp);
 360         xmlencode(fp, strippedname, strlen(strippedname));
 361         fputs("</h1><span class=\"desc\">", fp);
 362         xmlencode(fp, description, strlen(description));
 363         fputs("</span></td></tr>", fp);
 364         if (cloneurl[0]) {
 365                 fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
 366                 xmlencode(fp, cloneurl, strlen(cloneurl));
 367                 fputs("\">", fp);
 368                 xmlencode(fp, cloneurl, strlen(cloneurl));
 369                 fputs("</a></td></tr>", fp);
 370         }
 371         fputs("<tr><td></td><td>\n", fp);
 372         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 373         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 374         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 375         if (submodules)
 376                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 377                         relpath, submodules);
 378         if (readme)
 379                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 380                         relpath, readme);
 381         if (license)
 382                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 383                         relpath, license);
 384         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 385 }
 386
 387 void
 388 writefooter(FILE *fp)
 389 {
 390         fputs("</div>\n</body>\n</html>\n", fp);
 391 }
 392
 393 int
 394 writeblobhtml(FILE *fp, const git_blob *blob)
 395 {
 396         size_t n = 0, i, prev;
 397         const char *nfmt = "<a href=\"#l%d\" class=\"line\" id=\"l%d\">%7d</a> ";
 398         const char *s = git_blob_rawcontent(blob);
 399         git_off_t len = git_blob_rawsize(blob);
 400
 401         fputs("<pre id=\"blob\">\n", fp);
 402
 403         if (len > 0) {
 404                 for (i = 0, prev = 0; i < (size_t)len; i++) {
 405                         if (s[i] != '\n')
 406                                 continue;
 407                         n++;
 408                         fprintf(fp, nfmt, n, n, n);
 409                         xmlencode(fp, &s[prev], i - prev + 1);
 410                         prev = i + 1;
 411                 }
 412                 /* trailing data */
 413                 if ((len - prev) > 0) {
 414                         n++;
 415                         fprintf(fp, nfmt, n, n, n);
 416                         xmlencode(fp, &s[prev], len - prev);
 417                 }
 418         }
 419
 420         fputs("</pre>\n", fp);
 421
 422         return n;
 423 }
 424
 425 void
 426 printcommit(FILE *fp, struct commitinfo *ci)
 427 {
 428         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 429                 relpath, ci->oid, ci->oid);
 430
 431         if (ci->parentoid[0])
 432                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 433                         relpath, ci->parentoid, ci->parentoid);
 434
 435         if (ci->author) {
 436                 fputs("<b>Author:</b> ", fp);
 437                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 438                 fputs(" &lt;<a href=\"mailto:", fp);
 439                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 440                 fputs("\">", fp);
 441                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 442                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 443                 printtime(fp, &(ci->author->when));
 444                 fputc('\n', fp);
 445         }
 446         if (ci->msg) {
 447                 fputc('\n', fp);
 448                 xmlencode(fp, ci->msg, strlen(ci->msg));
 449                 fputc('\n', fp);
 450         }
 451 }
 452
 453 void
 454 printshowfile(FILE *fp, struct commitinfo *ci)
 455 {
 456         const git_diff_delta *delta;
 457         const git_diff_hunk *hunk;
 458         const git_diff_line *line;
 459         git_patch *patch;
 460         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 461         char linestr[80];
 462
 463         printcommit(fp, ci);
 464
 465         if (!ci->deltas)
 466                 return;
 467
 468         if (ci->filecount > 1000   ||
 469             ci->ndeltas   > 1000   ||
 470             ci->addcount  > 100000 ||
 471             ci->delcount  > 100000) {
 472                 fputs("Diff is too large, output suppressed.\n", fp);
 473                 return;
 474         }
 475
 476         /* diff stat */
 477         fputs("<b>Diffstat:</b>\n<table>", fp);
 478         for (i = 0; i < ci->ndeltas; i++) {
 479                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 480
 481                 fprintf(fp, "<tr><td><a href=\"#h%zu\">", i);
 482                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 483                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 484                         fputs(" -&gt; ", fp);
 485                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 486                 }
 487
 488                 add = ci->deltas[i]->addcount;
 489                 del = ci->deltas[i]->delcount;
 490                 changed = add + del;
 491                 total = sizeof(linestr) - 2;
 492                 if (changed > total) {
 493                         if (add)
 494                                 add = ((float)total / changed * add) + 1;
 495                         if (del)
 496                                 del = ((float)total / changed * del) + 1;
 497                 }
 498                 memset(&linestr, '+', add);
 499                 memset(&linestr[add], '-', del);
 500
 501                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 502                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 503                 fwrite(&linestr, 1, add, fp);
 504                 fputs("</span><span class=\"d\">", fp);
 505                 fwrite(&linestr[add], 1, del, fp);
 506                 fputs("</span></td></tr>\n", fp);
 507         }
 508         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 509                 ci->filecount, ci->filecount == 1 ? "" : "s",
 510                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 511                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 512
 513         fputs("<hr/>", fp);
 514
 515         for (i = 0; i < ci->ndeltas; i++) {
 516                 patch = ci->deltas[i]->patch;
 517                 delta = git_patch_get_delta(patch);
 518                 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",
 519                         i, relpath, delta->old_file.path, delta->old_file.path,
 520                         relpath, delta->new_file.path, delta->new_file.path);
 521
 522                 /* check binary data */
 523                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 524                         fputs("Binary files differ.\n", fp);
 525                         continue;
 526                 }
 527
 528                 nhunks = git_patch_num_hunks(patch);
 529                 for (j = 0; j < nhunks; j++) {
 530                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 531                                 break;
 532
 533                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 534                         xmlencode(fp, hunk->header, hunk->header_len);
 535                         fputs("</a>", fp);
 536
 537                         for (k = 0; ; k++) {
 538                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 539                                         break;
 540                                 if (line->old_lineno == -1)
 541                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 542                                                 i, j, k, i, j, k);
 543                                 else if (line->new_lineno == -1)
 544                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 545                                                 i, j, k, i, j, k);
 546                                 else
 547                                         fputc(' ', fp);
 548                                 xmlencode(fp, line->content, line->content_len);
 549                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 550                                         fputs("</a>", fp);
 551                         }
 552                 }
 553         }
 554 }
 555
 556 void
 557 writelogline(FILE *fp, struct commitinfo *ci)
 558 {
 559         fputs("<tr><td>", fp);
 560         if (ci->author)
 561                 printtimeshort(fp, &(ci->author->when));
 562         fputs("</td><td>", fp);
 563         if (ci->summary) {
 564                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 565                 xmlencode(fp, ci->summary, strlen(ci->summary));
 566                 fputs("</a>", fp);
 567         }
 568         fputs("</td><td>", fp);
 569         if (ci->author)
 570                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 571         fputs("</td><td class=\"num\" align=\"right\">", fp);
 572         fprintf(fp, "%zu", ci->filecount);
 573         fputs("</td><td class=\"num\" align=\"right\">", fp);
 574         fprintf(fp, "+%zu", ci->addcount);
 575         fputs("</td><td class=\"num\" align=\"right\">", fp);
 576         fprintf(fp, "-%zu", ci->delcount);
 577         fputs("</td></tr>\n", fp);
 578 }
 579
 580 int
 581 writelog(FILE *fp, const git_oid *oid)
 582 {
 583         struct commitinfo *ci;
 584         git_revwalk *w = NULL;
 585         git_oid id;
 586         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 587         FILE *fpfile;
 588         int r;
 589
 590         git_revwalk_new(&w, repo);
 591         git_revwalk_push(w, oid);
 592         git_revwalk_sorting(w, GIT_SORT_TIME);
 593         git_revwalk_simplify_first_parent(w);
 594
 595         while (!git_revwalk_next(&id, w)) {
 596                 relpath = "";
 597
 598                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 599                         break;
 600
 601                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 602                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 603                 if (r == -1 || (size_t)r >= sizeof(path))
 604                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 605                 r = access(path, F_OK);
 606
 607                 /* optimization: if there are no log lines to write and
 608                    the commit file already exists: skip the diffstat */
 609                 if (!nlogcommits && !r)
 610                         continue;
 611
 612                 if (!(ci = commitinfo_getbyoid(&id)))
 613                         break;
 614                 /* diffstat: for stagit HTML required for the log.html line */
 615                 if (commitinfo_getstats(ci) == -1)
 616                         goto err;
 617
 618                 if (nlogcommits < 0) {
 619                         writelogline(fp, ci);
 620                 } else if (nlogcommits > 0) {
 621                         writelogline(fp, ci);
 622                         nlogcommits--;
 623                         if (!nlogcommits && ci->parentoid[0])
 624                                 fputs("<tr><td></td><td colspan=\"5\">"
 625                                       "More commits remaining [...]</td>"
 626                                       "</tr>\n", fp);
 627                 }
 628
 629                 if (cachefile)
 630                         writelogline(wcachefp, ci);
 631
 632                 /* check if file exists if so skip it */
 633                 if (r) {
 634                         relpath = "../";
 635                         fpfile = efopen(path, "w");
 636                         writeheader(fpfile, ci->summary);
 637                         fputs("<pre>", fpfile);
 638                         printshowfile(fpfile, ci);
 639                         fputs("</pre>\n", fpfile);
 640                         writefooter(fpfile);
 641                         fclose(fpfile);
 642                 }
 643 err:
 644                 commitinfo_free(ci);
 645         }
 646         git_revwalk_free(w);
 647
 648         relpath = "";
 649
 650         return 0;
 651 }
 652
 653 void
 654 printcommitatom(FILE *fp, struct commitinfo *ci)
 655 {
 656         fputs("<entry>\n", fp);
 657
 658         fprintf(fp, "<id>%s</id>\n", ci->oid);
 659         if (ci->author) {
 660                 fputs("<published>", fp);
 661                 printtimez(fp, &(ci->author->when));
 662                 fputs("</published>\n", fp);
 663         }
 664         if (ci->committer) {
 665                 fputs("<updated>", fp);
 666                 printtimez(fp, &(ci->committer->when));
 667                 fputs("</updated>\n", fp);
 668         }
 669         if (ci->summary) {
 670                 fputs("<title type=\"text\">", fp);
 671                 xmlencode(fp, ci->summary, strlen(ci->summary));
 672                 fputs("</title>\n", fp);
 673         }
 674         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"commit/%s.html\" />",
 675                 ci->oid);
 676
 677         if (ci->author) {
 678                 fputs("<author><name>", fp);
 679                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 680                 fputs("</name>\n<email>", fp);
 681                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 682                 fputs("</email>\n</author>\n", fp);
 683         }
 684
 685         fputs("<content type=\"text\">", fp);
 686         fprintf(fp, "commit %s\n", ci->oid);
 687         if (ci->parentoid[0])
 688                 fprintf(fp, "parent %s\n", ci->parentoid);
 689         if (ci->author) {
 690                 fputs("Author: ", fp);
 691                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 692                 fputs(" &lt;", fp);
 693                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 694                 fputs("&gt;\nDate:   ", fp);
 695                 printtime(fp, &(ci->author->when));
 696                 fputc('\n', fp);
 697         }
 698         if (ci->msg) {
 699                 fputc('\n', fp);
 700                 xmlencode(fp, ci->msg, strlen(ci->msg));
 701         }
 702         fputs("\n</content>\n</entry>\n", fp);
 703 }
 704
 705 int
 706 writeatom(FILE *fp)
 707 {
 708         struct commitinfo *ci;
 709         git_revwalk *w = NULL;
 710         git_oid id;
 711         size_t i, m = 100; /* last 'm' commits */
 712
 713         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 714               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 715         xmlencode(fp, strippedname, strlen(strippedname));
 716         fputs(", branch HEAD</title>\n<subtitle>", fp);
 717         xmlencode(fp, description, strlen(description));
 718         fputs("</subtitle>\n", fp);
 719
 720         git_revwalk_new(&w, repo);
 721         git_revwalk_push_head(w);
 722         git_revwalk_sorting(w, GIT_SORT_TIME);
 723         git_revwalk_simplify_first_parent(w);
 724
 725         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 726                 if (!(ci = commitinfo_getbyoid(&id)))
 727                         break;
 728                 printcommitatom(fp, ci);
 729                 commitinfo_free(ci);
 730         }
 731         git_revwalk_free(w);
 732
 733         fputs("</feed>\n", fp);
 734
 735         return 0;
 736 }
 737
 738 int
 739 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 740 {
 741         char tmp[PATH_MAX] = "", *d;
 742         const char *p;
 743         int lc = 0;
 744         FILE *fp;
 745
 746         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 747                 errx(1, "path truncated: '%s'", fpath);
 748         if (!(d = dirname(tmp)))
 749                 err(1, "dirname");
 750         if (mkdirp(d))
 751                 return -1;
 752
 753         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 754                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 755                         errx(1, "path truncated: '../%s'", tmp);
 756         }
 757         relpath = tmp;
 758
 759         fp = efopen(fpath, "w");
 760         writeheader(fp, filename);
 761         fputs("<p> ", fp);
 762         xmlencode(fp, filename, strlen(filename));
 763         fprintf(fp, " (%juB)", (uintmax_t)filesize);
 764         fputs("</p><hr/>", fp);
 765
 766         if (git_blob_is_binary((git_blob *)obj)) {
 767                 fputs("<p>Binary file.</p>\n", fp);
 768         } else {
 769                 lc = writeblobhtml(fp, (git_blob *)obj);
 770                 if (ferror(fp))
 771                         err(1, "fwrite");
 772         }
 773         writefooter(fp);
 774         fclose(fp);
 775
 776         relpath = "";
 777
 778         return lc;
 779 }
 780
 781 const char *
 782 filemode(git_filemode_t m)
 783 {
 784         static char mode[11];
 785
 786         memset(mode, '-', sizeof(mode) - 1);
 787         mode[10] = '\0';
 788
 789         if (S_ISREG(m))
 790                 mode[0] = '-';
 791         else if (S_ISBLK(m))
 792                 mode[0] = 'b';
 793         else if (S_ISCHR(m))
 794                 mode[0] = 'c';
 795         else if (S_ISDIR(m))
 796                 mode[0] = 'd';
 797         else if (S_ISFIFO(m))
 798                 mode[0] = 'p';
 799         else if (S_ISLNK(m))
 800                 mode[0] = 'l';
 801         else if (S_ISSOCK(m))
 802                 mode[0] = 's';
 803         else
 804                 mode[0] = '?';
 805
 806         if (m & S_IRUSR) mode[1] = 'r';
 807         if (m & S_IWUSR) mode[2] = 'w';
 808         if (m & S_IXUSR) mode[3] = 'x';
 809         if (m & S_IRGRP) mode[4] = 'r';
 810         if (m & S_IWGRP) mode[5] = 'w';
 811         if (m & S_IXGRP) mode[6] = 'x';
 812         if (m & S_IROTH) mode[7] = 'r';
 813         if (m & S_IWOTH) mode[8] = 'w';
 814         if (m & S_IXOTH) mode[9] = 'x';
 815
 816         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 817         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 818         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 819
 820         return mode;
 821 }
 822
 823 int
 824 writefilestree(FILE *fp, git_tree *tree, const char *path)
 825 {
 826         const git_tree_entry *entry = NULL;
 827         git_submodule *module = NULL;
 828         git_object *obj = NULL;
 829         git_off_t filesize;
 830         const char *entryname;
 831         char filepath[PATH_MAX], entrypath[PATH_MAX];
 832         size_t count, i;
 833         int lc, r, ret;
 834
 835         count = git_tree_entrycount(tree);
 836         for (i = 0; i < count; i++) {
 837                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 838                     !(entryname = git_tree_entry_name(entry)))
 839                         return -1;
 840                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 841
 842                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 843                          entrypath);
 844                 if (r == -1 || (size_t)r >= sizeof(filepath))
 845                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 846
 847                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 848                         switch (git_object_type(obj)) {
 849                         case GIT_OBJ_BLOB:
 850                                 break;
 851                         case GIT_OBJ_TREE:
 852                                 /* NOTE: recurses */
 853                                 ret = writefilestree(fp, (git_tree *)obj,
 854                                                      entrypath);
 855                                 git_object_free(obj);
 856                                 if (ret)
 857                                         return ret;
 858                                 continue;
 859                         default:
 860                                 git_object_free(obj);
 861                                 continue;
 862                         }
 863
 864                         filesize = git_blob_rawsize((git_blob *)obj);
 865                         lc = writeblob(obj, filepath, entryname, filesize);
 866
 867                         fputs("<tr><td>", fp);
 868                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
 869                         fprintf(fp, "</td><td><a href=\"%s%s\">", relpath, filepath);
 870                         xmlencode(fp, entrypath, strlen(entrypath));
 871                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
 872                         if (lc > 0)
 873                                 fprintf(fp, "%dL", lc);
 874                         else
 875                                 fprintf(fp, "%juB", (uintmax_t)filesize);
 876                         fputs("</td></tr>\n", fp);
 877                         git_object_free(obj);
 878                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
 879                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
 880                                 relpath);
 881                         xmlencode(fp, entrypath, strlen(entrypath));
 882                         git_submodule_free(module);
 883                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
 884                 }
 885         }
 886
 887         return 0;
 888 }
 889
 890 int
 891 writefiles(FILE *fp, const git_oid *id)
 892 {
 893         git_tree *tree = NULL;
 894         git_commit *commit = NULL;
 895         int ret = -1;
 896
 897         fputs("<table id=\"files\"><thead>\n<tr>"
 898               "<td><b>Mode</b></td><td><b>Name</b></td>"
 899               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
 900               "</tr>\n</thead><tbody>\n", fp);
 901
 902         if (!git_commit_lookup(&commit, repo, id) &&
 903             !git_commit_tree(&tree, commit))
 904                 ret = writefilestree(fp, tree, "");
 905
 906         fputs("</tbody></table>", fp);
 907
 908         git_commit_free(commit);
 909         git_tree_free(tree);
 910
 911         return ret;
 912 }
 913
 914 int
 915 refs_cmp(const void *v1, const void *v2)
 916 {
 917         git_reference *r1 = (*(git_reference **)v1);
 918         git_reference *r2 = (*(git_reference **)v2);
 919         int r;
 920
 921         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
 922                 return r;
 923
 924         return strcmp(git_reference_shorthand(r1),
 925                       git_reference_shorthand(r2));
 926 }
 927
 928 int
 929 writerefs(FILE *fp)
 930 {
 931         struct commitinfo *ci;
 932         const git_oid *id = NULL;
 933         git_object *obj = NULL;
 934         git_reference *dref = NULL, *r, *ref = NULL;
 935         git_reference_iterator *it = NULL;
 936         git_reference **refs = NULL;
 937         size_t count, i, j, refcount;
 938         const char *titles[] = { "Branches", "Tags" };
 939         const char *ids[] = { "branches", "tags" };
 940         const char *name;
 941
 942         if (git_reference_iterator_new(&it, repo))
 943                 return -1;
 944
 945         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
 946                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
 947                         err(1, "realloc");
 948                 refs[refcount] = ref;
 949         }
 950         git_reference_iterator_free(it);
 951
 952         /* sort by type then shorthand name */
 953         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
 954
 955         for (j = 0; j < 2; j++) {
 956                 for (i = 0, count = 0; i < refcount; i++) {
 957                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
 958                             !(git_reference_is_tag(refs[i]) && j == 1))
 959                                 continue;
 960
 961                         switch (git_reference_type(refs[i])) {
 962                         case GIT_REF_SYMBOLIC:
 963                                 if (git_reference_resolve(&dref, refs[i]))
 964                                         goto err;
 965                                 r = dref;
 966                                 break;
 967                         case GIT_REF_OID:
 968                                 r = refs[i];
 969                                 break;
 970                         default:
 971                                 continue;
 972                         }
 973                         if (!git_reference_target(r) ||
 974                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
 975                                 goto err;
 976                         if (!(id = git_object_id(obj)))
 977                                 goto err;
 978                         if (!(ci = commitinfo_getbyoid(id)))
 979                                 break;
 980
 981                         /* print header if it has an entry (first). */
 982                         if (++count == 1) {
 983                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
 984                                         "<thead>\n<tr><td><b>Name</b></td>"
 985                                         "<td><b>Last commit date</b></td>"
 986                                         "<td><b>Author</b></td>\n</tr>\n"
 987                                         "</thead><tbody>\n",
 988                                          titles[j], ids[j]);
 989                         }
 990
 991                         relpath = "";
 992                         name = git_reference_shorthand(r);
 993
 994                         fputs("<tr><td>", fp);
 995                         xmlencode(fp, name, strlen(name));
 996                         fputs("</td><td>", fp);
 997                         if (ci->author)
 998                                 printtimeshort(fp, &(ci->author->when));
 999                         fputs("</td><td>", fp);
1000                         if (ci->author)
1001                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1002                         fputs("</td></tr>\n", fp);
1003
1004                         relpath = "../";
1005
1006                         commitinfo_free(ci);
1007                         git_object_free(obj);
1008                         obj = NULL;
1009                         git_reference_free(dref);
1010                         dref = NULL;
1011                 }
1012                 /* table footer */
1013                 if (count)
1014                         fputs("</tbody></table><br/>", fp);
1015         }
1016
1017 err:
1018         git_object_free(obj);
1019         git_reference_free(dref);
1020
1021         for (i = 0; i < refcount; i++)
1022                 git_reference_free(refs[i]);
1023         free(refs);
1024
1025         return 0;
1026 }
1027
1028 void
1029 usage(char *argv0)
1030 {
1031         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1032         exit(1);
1033 }
1034
1035 int
1036 main(int argc, char *argv[])
1037 {
1038         git_object *obj = NULL;
1039         const git_oid *head = NULL;
1040         const git_error *e = NULL;
1041         mode_t mask;
1042         FILE *fp, *fpread;
1043         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1044         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1045         size_t n;
1046         int i, fd;
1047
1048         for (i = 1; i < argc; i++) {
1049                 if (argv[i][0] != '-') {
1050                         if (repodir)
1051                                 usage(argv[0]);
1052                         repodir = argv[i];
1053                 } else if (argv[i][1] == 'c') {
1054                         if (nlogcommits > 0 || i + 1 >= argc)
1055                                 usage(argv[0]);
1056                         cachefile = argv[++i];
1057                 } else if (argv[i][1] == 'l') {
1058                         if (cachefile || i + 1 >= argc)
1059                                 usage(argv[0]);
1060                         errno = 0;
1061                         nlogcommits = strtoll(argv[++i], &p, 10);
1062                         if (argv[i][0] == '\0' || *p != '\0' ||
1063                             nlogcommits <= 0 || errno)
1064                                 usage(argv[0]);
1065                 }
1066         }
1067         if (!repodir)
1068                 usage(argv[0]);
1069
1070         if (!realpath(repodir, repodirabs))
1071                 err(1, "realpath");
1072
1073         git_libgit2_init();
1074
1075 #ifdef __OpenBSD__
1076         if (cachefile) {
1077                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1078                         err(1, "pledge");
1079         } else {
1080                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1081                         err(1, "pledge");
1082         }
1083 #endif
1084
1085         if (git_repository_open_ext(&repo, repodir,
1086                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1087                 e = giterr_last();
1088                 fprintf(stderr, "%s: %s\n", argv[0], e->message);
1089                 return 1;
1090         }
1091
1092         /* find HEAD */
1093         if (!git_revparse_single(&obj, repo, "HEAD"))
1094                 head = git_object_id(obj);
1095         git_object_free(obj);
1096
1097         /* use directory name as name */
1098         if ((name = strrchr(repodirabs, '/')))
1099                 name++;
1100         else
1101                 name = "";
1102
1103         /* strip .git suffix */
1104         if (!(strippedname = strdup(name)))
1105                 err(1, "strdup");
1106         if ((p = strrchr(strippedname, '.')))
1107                 if (!strcmp(p, ".git"))
1108                         *p = '\0';
1109
1110         /* read description or .git/description */
1111         joinpath(path, sizeof(path), repodir, "description");
1112         if (!(fpread = fopen(path, "r"))) {
1113                 joinpath(path, sizeof(path), repodir, ".git/description");
1114                 fpread = fopen(path, "r");
1115         }
1116         if (fpread) {
1117                 if (!fgets(description, sizeof(description), fpread))
1118                         description[0] = '\0';
1119                 fclose(fpread);
1120         }
1121
1122         /* read url or .git/url */
1123         joinpath(path, sizeof(path), repodir, "url");
1124         if (!(fpread = fopen(path, "r"))) {
1125                 joinpath(path, sizeof(path), repodir, ".git/url");
1126                 fpread = fopen(path, "r");
1127         }
1128         if (fpread) {
1129                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1130                         cloneurl[0] = '\0';
1131                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1132                 fclose(fpread);
1133         }
1134
1135         /* check LICENSE */
1136         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1137                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1138                     git_object_type(obj) == GIT_OBJ_BLOB)
1139                         license = licensefiles[i] + strlen("HEAD:");
1140                 git_object_free(obj);
1141         }
1142
1143         /* check README */
1144         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1145                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1146                     git_object_type(obj) == GIT_OBJ_BLOB)
1147                         readme = readmefiles[i] + strlen("HEAD:");
1148                 git_object_free(obj);
1149         }
1150
1151         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1152             git_object_type(obj) == GIT_OBJ_BLOB)
1153                 submodules = ".gitmodules";
1154         git_object_free(obj);
1155
1156         /* log for HEAD */
1157         fp = efopen("log.html", "w");
1158         relpath = "";
1159         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1160         writeheader(fp, "Log");
1161         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1162               "<td><b>Commit message</b></td>"
1163               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1164               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1165               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1166
1167         if (cachefile && head) {
1168                 /* read from cache file (does not need to exist) */
1169                 if ((rcachefp = fopen(cachefile, "r"))) {
1170                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1171                                 errx(1, "%s: no object id", cachefile);
1172                         if (git_oid_fromstr(&lastoid, lastoidstr))
1173                                 errx(1, "%s: invalid object id", cachefile);
1174                 }
1175
1176                 /* write log to (temporary) cache */
1177                 if ((fd = mkstemp(tmppath)) == -1)
1178                         err(1, "mkstemp");
1179                 if (!(wcachefp = fdopen(fd, "w")))
1180                         err(1, "fdopen: '%s'", tmppath);
1181                 /* write last commit id (HEAD) */
1182                 git_oid_tostr(buf, sizeof(buf), head);
1183                 fprintf(wcachefp, "%s\n", buf);
1184
1185                 writelog(fp, head);
1186
1187                 if (rcachefp) {
1188                         /* append previous log to log.html and the new cache */
1189                         while (!feof(rcachefp)) {
1190                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1191                                 if (ferror(rcachefp))
1192                                         err(1, "fread");
1193                                 if (fwrite(buf, 1, n, fp) != n ||
1194                                     fwrite(buf, 1, n, wcachefp) != n)
1195                                         err(1, "fwrite");
1196                         }
1197                         fclose(rcachefp);
1198                 }
1199                 fclose(wcachefp);
1200         } else {
1201                 if (head)
1202                         writelog(fp, head);
1203         }
1204
1205         fputs("</tbody></table>", fp);
1206         writefooter(fp);
1207         fclose(fp);
1208
1209         /* files for HEAD */
1210         fp = efopen("files.html", "w");
1211         writeheader(fp, "Files");
1212         if (head)
1213                 writefiles(fp, head);
1214         writefooter(fp);
1215         fclose(fp);
1216
1217         /* summary page with branches and tags */
1218         fp = efopen("refs.html", "w");
1219         writeheader(fp, "Refs");
1220         writerefs(fp);
1221         writefooter(fp);
1222         fclose(fp);
1223
1224         /* Atom feed */
1225         fp = efopen("atom.xml", "w");
1226         writeatom(fp);
1227         fclose(fp);
1228
1229         /* rename new cache file on success */
1230         if (cachefile && head) {
1231                 if (rename(tmppath, cachefile))
1232                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1233                 umask((mask = umask(0)));
1234                 if (chmod(cachefile,
1235                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1236                         err(1, "chmod: '%s'", cachefile);
1237         }
1238
1239         /* cleanup */
1240         git_repository_free(repo);
1241         git_libgit2_shutdown();
1242
1243         return 0;
1244 }