src/stagit.c

   1 #include <sys/stat.h>
   2 #include <sys/types.h>
   3
   4 #include <err.h>
   5 #include <errno.h>
   6 #include <libgen.h>
   7 #include <limits.h>
   8 #include <stdint.h>
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <stdbool.h>
  12 #include <string.h>
  13 #include <time.h>
  14 #include <unistd.h>
  15
  16 #include <git2.h>
  17
  18 #ifdef HAS_CMARK
  19 #include <cmark-gfm.h>
  20 #endif
  21
  22 #include "compat.h"
  23 #include "cp.h"
  24
  25 struct deltainfo {
  26         git_patch *patch;
  27
  28         size_t addcount;
  29         size_t delcount;
  30 };
  31
  32 struct commitinfo {
  33         const git_oid *id;
  34
  35         char oid[GIT_OID_HEXSZ + 1];
  36         char parentoid[GIT_OID_HEXSZ + 1];
  37
  38         const git_signature *author;
  39         const git_signature *committer;
  40         const char          *summary;
  41         const char          *msg;
  42
  43         git_diff   *diff;
  44         git_commit *commit;
  45         git_commit *parent;
  46         git_tree   *commit_tree;
  47         git_tree   *parent_tree;
  48
  49         size_t addcount;
  50         size_t delcount;
  51         size_t filecount;
  52
  53         struct deltainfo **deltas;
  54         size_t ndeltas;
  55 };
  56
  57 static git_repository *repo;
  58
  59 static const char *baseurl = ""; /* base URL to make absolute RSS/Atom URI */
  60 static const char *relpath = "";
  61 static const char *repodir;
  62
  63 static char *name = "";
  64 static char *strippedname = "";
  65 static char description[255];
  66 static char cloneurl[1024];
  67 static char *submodules;
  68 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
  69 static char *license;
  70 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
  71 static char *readme;
  72 static long long nlogcommits = -1; /* < 0 indicates not used */
  73
  74 bool htmlized; /* true if markdoown converted to HTML */
  75 static char oldfilename[PATH_MAX]; /* filename of the last file */
  76
  77 /* cache */
  78 static git_oid lastoid;
  79 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
  80 static FILE *rcachefp, *wcachefp;
  81 static const char *cachefile;
  82
  83 void
  84 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
  85 {
  86         int r;
  87
  88         r = snprintf(buf, bufsiz, "%s%s%s",
  89                 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  90         if (r < 0 || (size_t)r >= bufsiz)
  91                 errx(1, "path truncated: '%s%s%s'",
  92                         path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
  93 }
  94
  95 void
  96 deltainfo_free(struct deltainfo *di)
  97 {
  98         if (!di)
  99                 return;
 100         git_patch_free(di->patch);
 101         memset(di, 0, sizeof(*di));
 102         free(di);
 103 }
 104
 105 int
 106 commitinfo_getstats(struct commitinfo *ci)
 107 {
 108         struct deltainfo *di;
 109         git_diff_options opts;
 110         git_diff_find_options fopts;
 111         const git_diff_delta *delta;
 112         const git_diff_hunk *hunk;
 113         const git_diff_line *line;
 114         git_patch *patch = NULL;
 115         size_t ndeltas, nhunks, nhunklines;
 116         size_t i, j, k;
 117
 118         if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
 119                 goto err;
 120         if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
 121                 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
 122                         ci->parent = NULL;
 123                         ci->parent_tree = NULL;
 124                 }
 125         }
 126
 127         git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
 128         opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
 129                       GIT_DIFF_IGNORE_SUBMODULES |
 130                       GIT_DIFF_INCLUDE_TYPECHANGE;
 131         if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
 132                 goto err;
 133
 134         if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
 135                 goto err;
 136         /* find renames and copies, exact matches (no heuristic) for renames. */
 137         fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
 138                        GIT_DIFF_FIND_EXACT_MATCH_ONLY;
 139         if (git_diff_find_similar(ci->diff, &fopts))
 140                 goto err;
 141
 142         ndeltas = git_diff_num_deltas(ci->diff);
 143         if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
 144                 err(1, "calloc");
 145
 146         for (i = 0; i < ndeltas; i++) {
 147                 if (git_patch_from_diff(&patch, ci->diff, i))
 148                         goto err;
 149
 150                 if (!(di = calloc(1, sizeof(struct deltainfo))))
 151                         err(1, "calloc");
 152                 di->patch = patch;
 153                 ci->deltas[i] = di;
 154
 155                 delta = git_patch_get_delta(patch);
 156
 157                 /* skip stats for binary data */
 158                 if (delta->flags & GIT_DIFF_FLAG_BINARY)
 159                         continue;
 160
 161                 nhunks = git_patch_num_hunks(patch);
 162                 for (j = 0; j < nhunks; j++) {
 163                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 164                                 break;
 165                         for (k = 0; ; k++) {
 166                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 167                                         break;
 168                                 if (line->old_lineno == -1) {
 169                                         di->addcount++;
 170                                         ci->addcount++;
 171                                 } else if (line->new_lineno == -1) {
 172                                         di->delcount++;
 173                                         ci->delcount++;
 174                                 }
 175                         }
 176                 }
 177         }
 178         ci->ndeltas = i;
 179         ci->filecount = i;
 180
 181         return 0;
 182
 183 err:
 184         git_diff_free(ci->diff);
 185         ci->diff = NULL;
 186         git_tree_free(ci->commit_tree);
 187         ci->commit_tree = NULL;
 188         git_tree_free(ci->parent_tree);
 189         ci->parent_tree = NULL;
 190         git_commit_free(ci->parent);
 191         ci->parent = NULL;
 192
 193         if (ci->deltas)
 194                 for (i = 0; i < ci->ndeltas; i++)
 195                         deltainfo_free(ci->deltas[i]);
 196         free(ci->deltas);
 197         ci->deltas = NULL;
 198         ci->ndeltas = 0;
 199         ci->addcount = 0;
 200         ci->delcount = 0;
 201         ci->filecount = 0;
 202
 203         return -1;
 204 }
 205
 206 void
 207 commitinfo_free(struct commitinfo *ci)
 208 {
 209         size_t i;
 210
 211         if (!ci)
 212                 return;
 213         if (ci->deltas)
 214                 for (i = 0; i < ci->ndeltas; i++)
 215                         deltainfo_free(ci->deltas[i]);
 216
 217         free(ci->deltas);
 218         git_diff_free(ci->diff);
 219         git_tree_free(ci->commit_tree);
 220         git_tree_free(ci->parent_tree);
 221         git_commit_free(ci->commit);
 222         git_commit_free(ci->parent);
 223         memset(ci, 0, sizeof(*ci));
 224         free(ci);
 225 }
 226
 227 struct commitinfo *
 228 commitinfo_getbyoid(const git_oid *id)
 229 {
 230         struct commitinfo *ci;
 231
 232         if (!(ci = calloc(1, sizeof(struct commitinfo))))
 233                 err(1, "calloc");
 234
 235         if (git_commit_lookup(&(ci->commit), repo, id))
 236                 goto err;
 237         ci->id = id;
 238
 239         git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
 240         git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
 241
 242         ci->author = git_commit_author(ci->commit);
 243         ci->committer = git_commit_committer(ci->commit);
 244         ci->summary = git_commit_summary(ci->commit);
 245         ci->msg = git_commit_message(ci->commit);
 246
 247         return ci;
 248
 249 err:
 250         commitinfo_free(ci);
 251
 252         return NULL;
 253 }
 254
 255 FILE *
 256 efopen(const char *name, const char *flags)
 257 {
 258         FILE *fp;
 259
 260         if (!(fp = fopen(name, flags)))
 261                 err(1, "fopen: '%s'", name);
 262
 263         return fp;
 264 }
 265
 266 /* Escape characters below as HTML 2.0 / XML 1.0. */
 267 void
 268 xmlencode(FILE *fp, const char *s, size_t len)
 269 {
 270         size_t i;
 271
 272         for (i = 0; *s && i < len; s++, i++) {
 273                 switch(*s) {
 274                 case '<':  fputs("&lt;",   fp); break;
 275                 case '>':  fputs("&gt;",   fp); break;
 276                 case '\'': fputs("&#39;",  fp); break;
 277                 case '&':  fputs("&amp;",  fp); break;
 278                 case '"':  fputs("&quot;", fp); break;
 279                 default:   fputc(*s, fp);
 280                 }
 281         }
 282 }
 283
 284 /* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\n', '\r' */
 285 void
 286 xmlencodeline(FILE *fp, const char *s, size_t len)
 287 {
 288         size_t i;
 289
 290         for (i = 0; *s && i < len; s++, i++) {
 291                 switch(*s) {
 292                 case '<':  fputs("&lt;",   fp); break;
 293                 case '>':  fputs("&gt;",   fp); break;
 294                 case '\'': fputs("&#39;",  fp); break;
 295                 case '&':  fputs("&amp;",  fp); break;
 296                 case '"':  fputs("&quot;", fp); break;
 297                 case '\r': break; /* ignore CR */
 298                 case '\n': break; /* ignore LF */
 299                 default:   putc(*s, fp);
 300                 }
 301         }
 302 }
 303
 304 /* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\n', '\r' */
 305 void
 306 xmlencodeline(FILE *fp, const char *s, size_t len)
 307 {
 308         size_t i;
 309
 310         for (i = 0; *s && i < len; s++, i++) {
 311                 switch(*s) {
 312                 case '<':  fputs("&lt;",   fp); break;
 313                 case '>':  fputs("&gt;",   fp); break;
 314                 case '\'': fputs("&#39;",  fp); break;
 315                 case '&':  fputs("&amp;",  fp); break;
 316                 case '"':  fputs("&quot;", fp); break;
 317                 case '\r': break; /* ignore CR */
 318                 case '\n': break; /* ignore LF */
 319                 default:   putc(*s, fp);
 320                 }
 321         }
 322 }
 323
 324 int
 325 mkdirp(const char *path)
 326 {
 327         char tmp[PATH_MAX], *p;
 328
 329         if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
 330                 errx(1, "path truncated: '%s'", path);
 331         for (p = tmp + (tmp[0] == '/'); *p; p++) {
 332                 if (*p != '/')
 333                         continue;
 334                 *p = '\0';
 335                 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 336                         return -1;
 337                 *p = '/';
 338         }
 339         if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
 340                 return -1;
 341         return 0;
 342 }
 343
 344 void
 345 printtimez(FILE *fp, const git_time *intime)
 346 {
 347         struct tm *intm;
 348         time_t t;
 349         char out[32];
 350
 351         t = (time_t)intime->time;
 352         if (!(intm = gmtime(&t)))
 353                 return;
 354         strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
 355         fputs(out, fp);
 356 }
 357
 358 void
 359 printtime(FILE *fp, const git_time *intime)
 360 {
 361         struct tm *intm;
 362         time_t t;
 363         char out[32];
 364
 365         t = (time_t)intime->time + (intime->offset * 60);
 366         if (!(intm = gmtime(&t)))
 367                 return;
 368         strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
 369         if (intime->offset < 0)
 370                 fprintf(fp, "%s -%02d%02d", out,
 371                             -(intime->offset) / 60, -(intime->offset) % 60);
 372         else
 373                 fprintf(fp, "%s +%02d%02d", out,
 374                             intime->offset / 60, intime->offset % 60);
 375 }
 376
 377 void
 378 printtimeshort(FILE *fp, const git_time *intime)
 379 {
 380         struct tm *intm;
 381         time_t t;
 382         char out[32];
 383
 384         t = (time_t)intime->time;
 385         if (!(intm = gmtime(&t)))
 386                 return;
 387         strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
 388         fputs(out, fp);
 389 }
 390
 391 void
 392 writeheader(FILE *fp, const char *title)
 393 {
 394         fputs("<!DOCTYPE html>\n"
 395                 "<html lang=\"en\">\n<head>\n"
 396                 "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
 397                 "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n"
 398                 "<title>", fp);
 399         xmlencode(fp, title, strlen(title));
 400         if (title[0] && strippedname[0])
 401                 fputs(" - ", fp);
 402         xmlencode(fp, strippedname, strlen(strippedname));
 403         if (description[0])
 404                 fputs(" - ", fp);
 405         xmlencode(fp, description, strlen(description));
 406         fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
 407         fprintf(fp, "<link rel=\"alternate\" type=\"application/atom+xml\" title=\"%s Atom Feed\" href=\"%satom.xml\" />\n",
 408                 name, relpath);
 409         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
 410         fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%ssyntax.css\" />\n", relpath);
 411         fputs("</head>\n<body>\n<table><tr><td>", fp);
 412         fprintf(fp, "<a href=\"../%s\"><img alt=\"Home\" src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
 413                 relpath, relpath);
 414         fputs("</td><td><h1>", fp);
 415         xmlencode(fp, strippedname, strlen(strippedname));
 416         fputs("</h1></td></tr><tr><td></td><td><span class=\"desc\">", fp);
 417         xmlencode(fp, description, strlen(description));
 418         fputs("</span></td></tr>", fp);
 419         if (cloneurl[0]) {
 420                 fputs("<tr class=\"url\"><td></td><td><span class=\"clone\">git clone <a href=\"", fp);
 421                 xmlencode(fp, cloneurl, strlen(cloneurl));
 422                 fputs("\">", fp);
 423                 xmlencode(fp, cloneurl, strlen(cloneurl));
 424                 fputs("</a></span></td></tr>", fp);
 425         }
 426         fputs("<tr><td></td><td>\n", fp);
 427         fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
 428         fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
 429         fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
 430         if (submodules)
 431                 fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
 432                         relpath, submodules);
 433         if (readme)
 434                 fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
 435                         relpath, readme);
 436         if (license)
 437                 fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
 438                         relpath, license);
 439         fprintf(fp, " | <a href=\"%s%s.tar.gz\">Download</a>",
 440                                         relpath, strippedname);
 441         fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
 442 }
 443
 444 void
 445 writefooter(FILE *fp)
 446 {
 447         fputs("</div>\n</body>\n</html>\n", fp);
 448 }
 449
 450 const char *
 451 get_ext(const char *filename)
 452 {
 453         const char *dot = strrchr(filename, '.');
 454         if(!dot || dot == filename) return "";
 455         return dot + 1;
 456 }
 457
 458 void
 459 call_chroma(const char *filename, FILE *fp, const char *s, size_t len)
 460 {
 461         htmlized = false;
 462         char *html = "";
 463         // Flush HTML-file
 464         fflush(fp);
 465
 466 #ifdef HAS_CMARK
 467         html = cmark_markdown_to_html(s, len, CMARK_OPT_DEFAULT);
 468         if (strcmp(get_ext(filename), "md") == 0) htmlized = true;
 469 #endif
 470
 471 #ifdef HAS_CHROMA
 472         if (!htmlized) {
 473                 // Copy STDOUT
 474                 int stdout_copy = dup(1);
 475
 476                 // Redirect STDOUT
 477                 dup2(fileno(fp), 1);
 478
 479                 char cmd[255] = "chroma --html --html-only --html-lines --html-lines-table --filename ";
 480                 strncat(cmd, filename, strlen(filename) + 1);
 481                 FILE *child = popen(cmd, "w");
 482                 if (child == NULL) {
 483                         printf("child is null: %s", strerror(errno));
 484                         exit(1);
 485                 }
 486
 487                 // Give code to highlight through STDIN:
 488                 size_t i;
 489                 for (i = 0; *s && i < len; s++, i++) {
 490                         fprintf(child, "%c", *s);
 491                 }
 492
 493                 pclose(child);
 494                 fflush(stdout);
 495
 496                 // Give back STDOUT.
 497                 dup2(stdout_copy, 1);
 498
 499         } else {
 500                 fprintf(fp, "%s", html);
 501         }
 502 #else
 503                 fprintf(fp, "<pre>%s</pre>", s);
 504 #endif
 505 }
 506
 507 void
 508 writeblobhtml(const char *filename, FILE *fp, const git_blob *blob)
 509 {
 510         const char *s = git_blob_rawcontent(blob);
 511         git_off_t len = git_blob_rawsize(blob);
 512
 513         if (len > 0) {
 514                 call_chroma(filename, fp, s, len);
 515         }
 516 }
 517
 518 void
 519 printcommit(FILE *fp, struct commitinfo *ci)
 520 {
 521         fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 522                         relpath, ci->oid, ci->oid);
 523
 524         if (ci->parentoid[0])
 525                 fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
 526                                 relpath, ci->parentoid, ci->parentoid);
 527
 528         if (ci->author) {
 529                 fputs("<b>Author:</b> ", fp);
 530                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 531                 fputs(" &lt;<a href=\"mailto:", fp);
 532                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 533                 fputs("\">", fp);
 534                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 535                 fputs("</a>&gt;\n<b>Date:</b>   ", fp);
 536                 printtime(fp, &(ci->author->when));
 537                 fputc('\n', fp);
 538         }
 539         if (ci->msg) {
 540                 fputc('\n', fp);
 541                 xmlencode(fp, ci->msg, strlen(ci->msg));
 542                 fputc('\n', fp);
 543         }
 544 }
 545
 546 void
 547 printshowfile(FILE *fp, struct commitinfo *ci)
 548 {
 549         const git_diff_delta *delta;
 550         const git_diff_hunk *hunk;
 551         const git_diff_line *line;
 552         git_patch *patch;
 553         size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
 554         char linestr[80];
 555         int c;
 556
 557         printcommit(fp, ci);
 558
 559         if (!ci->deltas)
 560                 return;
 561
 562         if (ci->filecount > 1000   ||
 563             ci->ndeltas   > 1000   ||
 564             ci->addcount  > 100000 ||
 565             ci->delcount  > 100000) {
 566                 fputs("Diff is too large, output suppressed.\n", fp);
 567                 return;
 568         }
 569
 570         /* diff stat */
 571         fputs("<b>Diffstat:</b>\n<table>", fp);
 572         for (i = 0; i < ci->ndeltas; i++) {
 573                 delta = git_patch_get_delta(ci->deltas[i]->patch);
 574
 575                 switch (delta->status) {
 576                 case GIT_DELTA_ADDED:      c = 'A'; break;
 577                 case GIT_DELTA_COPIED:     c = 'C'; break;
 578                 case GIT_DELTA_DELETED:    c = 'D'; break;
 579                 case GIT_DELTA_MODIFIED:   c = 'M'; break;
 580                 case GIT_DELTA_RENAMED:    c = 'R'; break;
 581                 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
 582                 default:                   c = ' '; break;
 583                 }
 584                 if (c == ' ')
 585                         fprintf(fp, "<tr><td>%c", c);
 586                 else
 587                         fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
 588
 589                 fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
 590                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 591                 if (strcmp(delta->old_file.path, delta->new_file.path)) {
 592                         fputs(" -&gt; ", fp);
 593                         xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 594                 }
 595
 596                 add = ci->deltas[i]->addcount;
 597                 del = ci->deltas[i]->delcount;
 598                 changed = add + del;
 599                 total = sizeof(linestr) - 2;
 600                 if (changed > total) {
 601                         if (add)
 602                                 add = ((float)total / changed * add) + 1;
 603                         if (del)
 604                                 del = ((float)total / changed * del) + 1;
 605                 }
 606                 memset(&linestr, '+', add);
 607                 memset(&linestr[add], '-', del);
 608
 609                 fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
 610                         ci->deltas[i]->addcount + ci->deltas[i]->delcount);
 611                 fwrite(&linestr, 1, add, fp);
 612                 fputs("</span><span class=\"d\">", fp);
 613                 fwrite(&linestr[add], 1, del, fp);
 614                 fputs("</span></td></tr>\n", fp);
 615         }
 616         fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
 617                 ci->filecount, ci->filecount == 1 ? "" : "s",
 618                 ci->addcount,  ci->addcount  == 1 ? "" : "s",
 619                 ci->delcount,  ci->delcount  == 1 ? "" : "s");
 620
 621         fputs("<hr/>", fp);
 622
 623         for (i = 0; i < ci->ndeltas; i++) {
 624                 patch = ci->deltas[i]->patch;
 625                 delta = git_patch_get_delta(patch);
 626                 fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
 627                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 628                 fputs(".html\">", fp);
 629                 xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
 630                 fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
 631                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 632                 fprintf(fp, ".html\">");
 633                 xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
 634                 fprintf(fp, "</a></b>\n");
 635
 636                 /* check binary data */
 637                 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
 638                         fputs("Binary files differ.\n", fp);
 639                         continue;
 640                 }
 641
 642                 nhunks = git_patch_num_hunks(patch);
 643                 for (j = 0; j < nhunks; j++) {
 644                         if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
 645                                 break;
 646
 647                         fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
 648                         xmlencode(fp, hunk->header, hunk->header_len);
 649                         fputs("</a>", fp);
 650
 651                         for (k = 0; ; k++) {
 652                                 if (git_patch_get_line_in_hunk(&line, patch, j, k))
 653                                         break;
 654                                 if (line->old_lineno == -1)
 655                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
 656                                                 i, j, k, i, j, k);
 657                                 else if (line->new_lineno == -1)
 658                                         fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
 659                                                 i, j, k, i, j, k);
 660                                 else
 661                                         putc(' ', fp);
 662                                 xmlencodeline(fp, line->content, line->content_len);
 663                                 putc('\n', fp);
 664                                 if (line->old_lineno == -1 || line->new_lineno == -1)
 665                                         fputs("</a>", fp);
 666                         }
 667                 }
 668         }
 669 }
 670
 671 void
 672 writelogline(FILE *fp, struct commitinfo *ci)
 673 {
 674         fputs("<tr><td>", fp);
 675         if (ci->author)
 676                 printtimeshort(fp, &(ci->author->when));
 677         fputs("</td><td>", fp);
 678         if (ci->summary) {
 679                 fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
 680                 xmlencode(fp, ci->summary, strlen(ci->summary));
 681                 fputs("</a>", fp);
 682         }
 683         fputs("</td><td>", fp);
 684         if (ci->author)
 685                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 686         fputs("</td><td class=\"num\" align=\"right\">", fp);
 687         fprintf(fp, "%zu", ci->filecount);
 688         fputs("</td><td class=\"num\" align=\"right\">", fp);
 689         fprintf(fp, "+%zu", ci->addcount);
 690         fputs("</td><td class=\"num\" align=\"right\">", fp);
 691         fprintf(fp, "-%zu", ci->delcount);
 692         fputs("</td></tr>\n", fp);
 693 }
 694
 695 int
 696 writelog(FILE *fp, const git_oid *oid)
 697 {
 698         struct commitinfo *ci;
 699         git_revwalk *w = NULL;
 700         git_oid id;
 701         char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
 702         FILE *fpfile;
 703         int r;
 704
 705         git_revwalk_new(&w, repo);
 706         git_revwalk_push(w, oid);
 707         git_revwalk_simplify_first_parent(w);
 708
 709         while (!git_revwalk_next(&id, w)) {
 710                 relpath = "";
 711
 712                 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
 713                         break;
 714
 715                 git_oid_tostr(oidstr, sizeof(oidstr), &id);
 716                 r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
 717                 if (r < 0 || (size_t)r >= sizeof(path))
 718                         errx(1, "path truncated: 'commit/%s.html'", oidstr);
 719                 r = access(path, F_OK);
 720
 721                 /* optimization: if there are no log lines to write and
 722                    the commit file already exists: skip the diffstat */
 723                 if (!nlogcommits && !r)
 724                         continue;
 725
 726                 if (!(ci = commitinfo_getbyoid(&id)))
 727                         break;
 728                 /* diffstat: for stagit HTML required for the log.html line */
 729                 if (commitinfo_getstats(ci) == -1)
 730                         goto err;
 731
 732                 if (nlogcommits < 0) {
 733                         writelogline(fp, ci);
 734                 } else if (nlogcommits > 0) {
 735                         writelogline(fp, ci);
 736                         nlogcommits--;
 737                         if (!nlogcommits && ci->parentoid[0])
 738                                 fputs("<tr><td></td><td colspan=\"5\">"
 739                                       "More commits remaining [...]</td>"
 740                                       "</tr>\n", fp);
 741                 }
 742
 743                 if (cachefile)
 744                         writelogline(wcachefp, ci);
 745
 746                 /* check if file exists if so skip it */
 747                 if (r) {
 748                         relpath = "../";
 749                         fpfile = efopen(path, "w");
 750                         writeheader(fpfile, ci->summary);
 751                         fputs("<pre>", fpfile);
 752                         printshowfile(fpfile, ci);
 753                         fputs("</pre>\n", fpfile);
 754                         writefooter(fpfile);
 755                         fclose(fpfile);
 756                 }
 757 err:
 758                 commitinfo_free(ci);
 759         }
 760         git_revwalk_free(w);
 761
 762         relpath = "";
 763
 764         return 0;
 765 }
 766
 767 void
 768 printcommitatom(FILE *fp, struct commitinfo *ci)
 769 {
 770         fputs("<entry>\n", fp);
 771
 772         fprintf(fp, "<id>%s</id>\n", ci->oid);
 773         if (ci->author) {
 774                 fputs("<published>", fp);
 775                 printtimez(fp, &(ci->author->when));
 776                 fputs("</published>\n", fp);
 777         }
 778         if (ci->committer) {
 779                 fputs("<updated>", fp);
 780                 printtimez(fp, &(ci->committer->when));
 781                 fputs("</updated>\n", fp);
 782         }
 783         if (ci->summary) {
 784                 fputs("<title type=\"text\">", fp);
 785                 xmlencode(fp, ci->summary, strlen(ci->summary));
 786                 fputs("</title>\n", fp);
 787         }
 788         fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"%scommit/%s.html\" />\n",
 789                 baseurl, ci->oid);
 790
 791         if (ci->author) {
 792                 fputs("<author>\n<name>", fp);
 793                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 794                 fputs("</name>\n<email>", fp);
 795                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 796                 fputs("</email>\n</author>\n", fp);
 797         }
 798
 799         fputs("<content type=\"text\">", fp);
 800         fprintf(fp, "commit %s\n", ci->oid);
 801         if (ci->parentoid[0])
 802                 fprintf(fp, "parent %s\n", ci->parentoid);
 803         if (ci->author) {
 804                 fputs("Author: ", fp);
 805                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
 806                 fputs(" &lt;", fp);
 807                 xmlencode(fp, ci->author->email, strlen(ci->author->email));
 808                 fputs("&gt;\nDate:   ", fp);
 809                 printtime(fp, &(ci->author->when));
 810                 fputc('\n', fp);
 811         }
 812         if (ci->msg) {
 813                 fputc('\n', fp);
 814                 xmlencode(fp, ci->msg, strlen(ci->msg));
 815         }
 816         fputs("\n</content>\n</entry>\n", fp);
 817 }
 818
 819 int
 820 writeatom(FILE *fp)
 821 {
 822         struct commitinfo *ci;
 823         git_revwalk *w = NULL;
 824         git_oid id;
 825         size_t i, m = 100; /* last 'm' commits */
 826
 827         fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
 828               "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
 829         xmlencode(fp, strippedname, strlen(strippedname));
 830         fputs(", branch HEAD</title>\n<subtitle>", fp);
 831         xmlencode(fp, description, strlen(description));
 832         fputs("</subtitle>\n", fp);
 833
 834         git_revwalk_new(&w, repo);
 835         git_revwalk_push_head(w);
 836         git_revwalk_simplify_first_parent(w);
 837
 838         for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
 839                 if (!(ci = commitinfo_getbyoid(&id)))
 840                         break;
 841                 printcommitatom(fp, ci);
 842                 commitinfo_free(ci);
 843         }
 844         git_revwalk_free(w);
 845
 846         fputs("</feed>\n", fp);
 847
 848         return 0;
 849 }
 850
 851 float
 852 rounder(float var)
 853 {
 854     int value = var * 10 + .5;
 855     return value / 10.0;
 856 }
 857
 858 const char *
 859 convertbytes(int bytes)
 860 {
 861         bytes = (float)bytes;
 862         static char outp[25];
 863         if (bytes < 1024) sprintf(outp, "%u %s", bytes, "B");
 864         else if (bytes < 1048576) sprintf(outp, "%0.1f %s", rounder(bytes/1024.0), "K");
 865         else sprintf(outp, "%0.1f %s", rounder(bytes/1048576.0), "M");
 866         return outp;
 867 }
 868
 869 void
 870 writeblob(git_object *obj, const char *fpath, const char *filename, git_off_t filesize)
 871 {
 872         char tmp[PATH_MAX] = "", *d;
 873         const char *p;
 874         FILE *fp;
 875
 876         if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
 877                 errx(1, "path truncated: '%s'", fpath);
 878         if (!(d = dirname(tmp)))
 879                 err(1, "dirname");
 880         mkdirp(d);
 881
 882         for (p = fpath, tmp[0] = '\0'; *p; p++) {
 883                 if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
 884                         errx(1, "path truncated: '../%s'", tmp);
 885         }
 886         relpath = tmp;
 887
 888         fp = efopen(fpath, "w");
 889         writeheader(fp, filename);
 890         fputs("<p> ", fp);
 891         xmlencode(fp, filename, strlen(filename));
 892         fprintf(fp, " (%s)", convertbytes((int)filesize));
 893
 894 #ifdef HAS_CMARK
 895         char newfpath[PATH_MAX];
 896         char newfilename[PATH_MAX];
 897         if (strcmp(get_ext(filename), "md") == 0) {
 898                 fprintf(fp, " <a href=\"%s.html-raw\">View raw</a>", filename);
 899                 strcpy(newfpath, fpath);
 900                 strcat(newfpath, "-raw");
 901
 902                 strcpy(newfilename, filename);
 903                 strcat(newfilename, "-raw");
 904                 strcpy(oldfilename, filename);
 905
 906                 /* NOTE: recurses */
 907                 writeblob(obj, newfpath, newfilename, filesize);
 908         } else if (strcmp(get_ext(filename), "md-raw" ) == 0) {
 909                 fprintf(fp, " <a href=\"%s.html\">View rendered</a>", oldfilename);
 910         }
 911 #endif
 912
 913         fputs(".</p><hr/>", fp);
 914
 915         if (git_blob_is_binary((git_blob *)obj)) {
 916                 fputs("<p>Binary file.</p>\n", fp);
 917         } else {
 918                 writeblobhtml(filename, fp, (git_blob *)obj);
 919                 if (ferror(fp))
 920                         err(1, "fwrite");
 921         }
 922
 923         writefooter(fp);
 924         fclose(fp);
 925
 926         relpath = "";
 927 }
 928
 929 const char *
 930 filemode(git_filemode_t m)
 931 {
 932         static char mode[11];
 933
 934         memset(mode, '-', sizeof(mode) - 1);
 935         mode[10] = '\0';
 936
 937         if (S_ISREG(m))
 938                 mode[0] = '-';
 939         else if (S_ISBLK(m))
 940                 mode[0] = 'b';
 941         else if (S_ISCHR(m))
 942                 mode[0] = 'c';
 943         else if (S_ISDIR(m))
 944                 mode[0] = 'd';
 945         else if (S_ISFIFO(m))
 946                 mode[0] = 'p';
 947         else if (S_ISLNK(m))
 948                 mode[0] = 'l';
 949         else if (S_ISSOCK(m))
 950                 mode[0] = 's';
 951         else
 952                 mode[0] = '?';
 953
 954         if (m & S_IRUSR) mode[1] = 'r';
 955         if (m & S_IWUSR) mode[2] = 'w';
 956         if (m & S_IXUSR) mode[3] = 'x';
 957         if (m & S_IRGRP) mode[4] = 'r';
 958         if (m & S_IWGRP) mode[5] = 'w';
 959         if (m & S_IXGRP) mode[6] = 'x';
 960         if (m & S_IROTH) mode[7] = 'r';
 961         if (m & S_IWOTH) mode[8] = 'w';
 962         if (m & S_IXOTH) mode[9] = 'x';
 963
 964         if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
 965         if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
 966         if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
 967
 968         return mode;
 969 }
 970
 971 int
 972 writefilestree(FILE *fp, git_tree *tree, const char *path)
 973 {
 974         const git_tree_entry *entry = NULL;
 975         git_submodule *module = NULL;
 976         git_object *obj = NULL;
 977         git_off_t filesize;
 978         const char *entryname;
 979         char filepath[PATH_MAX], entrypath[PATH_MAX];
 980         size_t count, i;
 981         int r, ret;
 982
 983         count = git_tree_entrycount(tree);
 984         for (i = 0; i < count; i++) {
 985                 if (!(entry = git_tree_entry_byindex(tree, i)) ||
 986                     !(entryname = git_tree_entry_name(entry)))
 987                         return -1;
 988                 joinpath(entrypath, sizeof(entrypath), path, entryname);
 989
 990                 r = snprintf(filepath, sizeof(filepath), "file/%s.html",
 991                          entrypath);
 992                 if (r < 0 || (size_t)r >= sizeof(filepath))
 993                         errx(1, "path truncated: 'file/%s.html'", entrypath);
 994
 995                 if (!git_tree_entry_to_object(&obj, repo, entry)) {
 996                         switch (git_object_type(obj)) {
 997                         case GIT_OBJ_BLOB:
 998                                 break;
 999                         case GIT_OBJ_TREE:
1000                                 /* NOTE: recurses */
1001                                 ret = writefilestree(fp, (git_tree *)obj,
1002                                                      entrypath);
1003                                 git_object_free(obj);
1004                                 if (ret)
1005                                         return ret;
1006                                 continue;
1007                         default:
1008                                 git_object_free(obj);
1009                                 continue;
1010                         }
1011
1012                         filesize = git_blob_rawsize((git_blob *)obj);
1013                         writeblob(obj, filepath, entryname, filesize);
1014
1015                         fputs("<tr><td>", fp);
1016                         fputs(filemode(git_tree_entry_filemode(entry)), fp);
1017                         fprintf(fp, "</td><td><a href=\"%s", relpath);
1018                         xmlencode(fp, filepath, strlen(filepath));
1019                         fputs("\">", fp);
1020                         xmlencode(fp, entrypath, strlen(entrypath));
1021                         fputs("</a></td><td class=\"num\" align=\"right\">", fp);
1022                         fprintf(fp, "%s", convertbytes((int)filesize));
1023                         fputs("</td></tr>\n", fp);
1024                         git_object_free(obj);
1025                 } else if (!git_submodule_lookup(&module, repo, entryname)) {
1026                         fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
1027                                 relpath);
1028                         xmlencode(fp, entrypath, strlen(entrypath));
1029                         git_submodule_free(module);
1030                         fputs("</a></td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
1031                 }
1032         }
1033
1034         return 0;
1035 }
1036
1037 int
1038 writefiles(FILE *fp, const git_oid *id)
1039 {
1040         git_tree *tree = NULL;
1041         git_commit *commit = NULL;
1042         int ret = -1;
1043
1044         fputs("<table id=\"files\"><thead>\n<tr>"
1045               "<td><b>Mode</b></td><td><b>Name</b></td>"
1046               "<td class=\"num\" align=\"right\"><b>Size</b></td>"
1047               "</tr>\n</thead><tbody>\n", fp);
1048
1049         if (!git_commit_lookup(&commit, repo, id) &&
1050             !git_commit_tree(&tree, commit))
1051                 ret = writefilestree(fp, tree, "");
1052
1053         fputs("</tbody></table>", fp);
1054
1055         git_commit_free(commit);
1056         git_tree_free(tree);
1057
1058         return ret;
1059 }
1060
1061 int
1062 refs_cmp(const void *v1, const void *v2)
1063 {
1064         git_reference *r1 = (*(git_reference **)v1);
1065         git_reference *r2 = (*(git_reference **)v2);
1066         int r;
1067
1068         if ((r = git_reference_is_branch(r1) - git_reference_is_branch(r2)))
1069                 return r;
1070
1071         return strcmp(git_reference_shorthand(r1),
1072                       git_reference_shorthand(r2));
1073 }
1074
1075 int
1076 writerefs(FILE *fp)
1077 {
1078         struct commitinfo *ci;
1079         const git_oid *id = NULL;
1080         git_object *obj = NULL;
1081         git_reference *dref = NULL, *r, *ref = NULL;
1082         git_reference_iterator *it = NULL;
1083         git_reference **refs = NULL;
1084         size_t count, i, j, refcount;
1085         const char *titles[] = { "Branches", "Tags" };
1086         const char *ids[] = { "branches", "tags" };
1087         const char *name;
1088
1089         if (git_reference_iterator_new(&it, repo))
1090                 return -1;
1091
1092         for (refcount = 0; !git_reference_next(&ref, it); refcount++) {
1093                 if (!(refs = reallocarray(refs, refcount + 1, sizeof(git_reference *))))
1094                         err(1, "realloc");
1095                 refs[refcount] = ref;
1096         }
1097         git_reference_iterator_free(it);
1098
1099         /* sort by type then shorthand name */
1100         qsort(refs, refcount, sizeof(git_reference *), refs_cmp);
1101
1102         for (j = 0; j < 2; j++) {
1103                 for (i = 0, count = 0; i < refcount; i++) {
1104                         if (!(git_reference_is_branch(refs[i]) && j == 0) &&
1105                             !(git_reference_is_tag(refs[i]) && j == 1))
1106                                 continue;
1107
1108                         switch (git_reference_type(refs[i])) {
1109                         case GIT_REF_SYMBOLIC:
1110                                 if (git_reference_resolve(&dref, refs[i]))
1111                                         goto err;
1112                                 r = dref;
1113                                 break;
1114                         case GIT_REF_OID:
1115                                 r = refs[i];
1116                                 break;
1117                         default:
1118                                 continue;
1119                         }
1120                         if (!git_reference_target(r) ||
1121                             git_reference_peel(&obj, r, GIT_OBJ_ANY))
1122                                 goto err;
1123                         if (!(id = git_object_id(obj)))
1124                                 goto err;
1125                         if (!(ci = commitinfo_getbyoid(id)))
1126                                 break;
1127
1128                         /* print header if it has an entry (first). */
1129                         if (++count == 1) {
1130                                 fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
1131                                         "<thead>\n<tr><td><b>Name</b></td>"
1132                                         "<td><b>Last commit date</b></td>"
1133                                         "<td><b>Author</b></td>\n</tr>\n"
1134                                         "</thead><tbody>\n",
1135                                          titles[j], ids[j]);
1136                         }
1137
1138                         relpath = "";
1139                         name = git_reference_shorthand(r);
1140
1141                         fputs("<tr><td>", fp);
1142                         xmlencode(fp, name, strlen(name));
1143                         fputs("</td><td>", fp);
1144                         if (ci->author)
1145                                 printtimeshort(fp, &(ci->author->when));
1146                         fputs("</td><td>", fp);
1147                         if (ci->author)
1148                                 xmlencode(fp, ci->author->name, strlen(ci->author->name));
1149                         fputs("</td></tr>\n", fp);
1150
1151                         relpath = "../";
1152
1153                         commitinfo_free(ci);
1154                         git_object_free(obj);
1155                         obj = NULL;
1156                         git_reference_free(dref);
1157                         dref = NULL;
1158                 }
1159                 /* table footer */
1160                 if (count)
1161                         fputs("</tbody></table><br/>", fp);
1162         }
1163
1164 err:
1165         git_object_free(obj);
1166         git_reference_free(dref);
1167
1168         for (i = 0; i < refcount; i++)
1169                 git_reference_free(refs[i]);
1170         free(refs);
1171
1172         return 0;
1173 }
1174
1175 void
1176 usage(char *argv0)
1177 {
1178         fprintf(stderr, "%s [-c cachefile | -l commits] repodir\n", argv0);
1179         exit(1);
1180 }
1181
1182 int
1183 main(int argc, char *argv[])
1184 {
1185         git_object *obj = NULL;
1186         const git_oid *head = NULL;
1187         mode_t mask;
1188         FILE *fp, *fpread;
1189         char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1190         char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1191         size_t n;
1192         int i, fd;
1193
1194         for (i = 1; i < argc; i++) {
1195                 if (argv[i][0] != '-') {
1196                         if (repodir)
1197                                 usage(argv[0]);
1198                         repodir = argv[i];
1199                 } else if (argv[i][1] == 'c') {
1200                         if (nlogcommits > 0 || i + 1 >= argc)
1201                                 usage(argv[0]);
1202                         cachefile = argv[++i];
1203                 } else if (argv[i][1] == 'l') {
1204                         if (cachefile || i + 1 >= argc)
1205                                 usage(argv[0]);
1206                         errno = 0;
1207                         nlogcommits = strtoll(argv[++i], &p, 10);
1208                         if (argv[i][0] == '\0' || *p != '\0' ||
1209                             nlogcommits <= 0 || errno)
1210                                 usage(argv[0]);
1211                 }
1212         }
1213         if (!repodir)
1214                 usage(argv[0]);
1215
1216         if (!realpath(repodir, repodirabs))
1217                 err(1, "realpath");
1218
1219         git_libgit2_init();
1220
1221 #ifdef __OpenBSD__
1222         if (unveil(repodir, "r") == -1)
1223                 err(1, "unveil: %s", repodir);
1224         if (unveil(".", "rwc") == -1)
1225                 err(1, "unveil: .");
1226         if (cachefile && unveil(cachefile, "rwc") == -1)
1227                 err(1, "unveil: %s", cachefile);
1228
1229         if (cachefile) {
1230                 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1231                         err(1, "pledge");
1232         } else {
1233                 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1234                         err(1, "pledge");
1235         }
1236 #endif
1237
1238         if ((p = getenv("STAGIT_BASEURL")))
1239                 baseurl = p;
1240
1241         if (git_repository_open_ext(&repo, repodir,
1242                 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1243                 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1244                 return 1;
1245         }
1246
1247         /* find HEAD */
1248         if (!git_revparse_single(&obj, repo, "HEAD"))
1249                 head = git_object_id(obj);
1250         git_object_free(obj);
1251
1252         /* use directory name as name */
1253         if ((name = strrchr(repodirabs, '/')))
1254                 name++;
1255         else
1256                 name = "";
1257
1258         /* copy css */
1259         char cwd[PATH_MAX];
1260         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1261         cp("/usr/local/share/stagit/syntax.css", strcat(cwd, "/syntax.css"));
1262         strcpy(cwd, getcwd(cwd, sizeof(cwd)));
1263         cp("/usr/local/share/stagit/style.css", strcat(cwd, "/style.css"));
1264
1265         /* strip .git suffix */
1266         if (!(strippedname = strdup(name)))
1267                 err(1, "strdup");
1268         if ((p = strrchr(strippedname, '.')))
1269                 if (!strcmp(p, ".git"))
1270                         *p = '\0';
1271
1272         /* read description or .git/description */
1273         joinpath(path, sizeof(path), repodir, "description");
1274         if (!(fpread = fopen(path, "r"))) {
1275                 joinpath(path, sizeof(path), repodir, ".git/description");
1276                 fpread = fopen(path, "r");
1277         }
1278         if (fpread) {
1279                 if (!fgets(description, sizeof(description), fpread))
1280                         description[0] = '\0';
1281                 fclose(fpread);
1282         }
1283
1284         /* read url or .git/url */
1285         joinpath(path, sizeof(path), repodir, "url");
1286         if (!(fpread = fopen(path, "r"))) {
1287                 joinpath(path, sizeof(path), repodir, ".git/url");
1288                 fpread = fopen(path, "r");
1289         }
1290         if (fpread) {
1291                 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1292                         cloneurl[0] = '\0';
1293                 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1294                 fclose(fpread);
1295         }
1296
1297         /* check LICENSE */
1298         for (i = 0; i < sizeof(licensefiles) / sizeof(*licensefiles) && !license; i++) {
1299                 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1300                     git_object_type(obj) == GIT_OBJ_BLOB)
1301                         license = licensefiles[i] + strlen("HEAD:");
1302                 git_object_free(obj);
1303         }
1304
1305         /* check README */
1306         for (i = 0; i < sizeof(readmefiles) / sizeof(*readmefiles) && !readme; i++) {
1307                 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1308                     git_object_type(obj) == GIT_OBJ_BLOB)
1309                         readme = readmefiles[i] + strlen("HEAD:");
1310                 git_object_free(obj);
1311         }
1312
1313         if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1314             git_object_type(obj) == GIT_OBJ_BLOB)
1315                 submodules = ".gitmodules";
1316         git_object_free(obj);
1317
1318         /* Generate tarball */
1319         char tarball[255];
1320         sprintf(tarball, "tar -zcf %s.tar.gz --ignore-failed-read --exclude='.git' %s",
1321                             strippedname, repodir);
1322         system(tarball);
1323
1324         /* log for HEAD */
1325         fp = efopen("log.html", "w");
1326         relpath = "";
1327         mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1328         writeheader(fp, "Log");
1329         fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
1330               "<td><b>Commit</b></td>"
1331               "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
1332               "<td class=\"num\" align=\"right\"><b>+</b></td>"
1333               "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
1334
1335         if (cachefile && head) {
1336                 /* read from cache file (does not need to exist) */
1337                 if ((rcachefp = fopen(cachefile, "r"))) {
1338                         if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1339                                 errx(1, "%s: no object id", cachefile);
1340                         if (git_oid_fromstr(&lastoid, lastoidstr))
1341                                 errx(1, "%s: invalid object id", cachefile);
1342                 }
1343
1344                 /* write log to (temporary) cache */
1345                 if ((fd = mkstemp(tmppath)) == -1)
1346                         err(1, "mkstemp");
1347                 if (!(wcachefp = fdopen(fd, "w")))
1348                         err(1, "fdopen: '%s'", tmppath);
1349                 /* write last commit id (HEAD) */
1350                 git_oid_tostr(buf, sizeof(buf), head);
1351                 fprintf(wcachefp, "%s\n", buf);
1352
1353                 writelog(fp, head);
1354
1355                 if (rcachefp) {
1356                         /* append previous log to log.html and the new cache */
1357                         while (!feof(rcachefp)) {
1358                                 n = fread(buf, 1, sizeof(buf), rcachefp);
1359                                 if (ferror(rcachefp))
1360                                         err(1, "fread");
1361                                 if (fwrite(buf, 1, n, fp) != n ||
1362                                     fwrite(buf, 1, n, wcachefp) != n)
1363                                         err(1, "fwrite");
1364                         }
1365                         fclose(rcachefp);
1366                 }
1367                 fclose(wcachefp);
1368         } else {
1369                 if (head)
1370                         writelog(fp, head);
1371         }
1372
1373         fputs("</tbody></table>", fp);
1374         writefooter(fp);
1375         fclose(fp);
1376
1377         /* files for HEAD */
1378         fp = efopen("files.html", "w");
1379         writeheader(fp, "Files");
1380         if (head)
1381                 writefiles(fp, head);
1382         writefooter(fp);
1383         fclose(fp);
1384
1385         cp("files.html", "index.html");
1386
1387         /* summary page with branches and tags */
1388         fp = efopen("refs.html", "w");
1389         writeheader(fp, "Refs");
1390         writerefs(fp);
1391         writefooter(fp);
1392         fclose(fp);
1393
1394         /* Atom feed */
1395         fp = efopen("atom.xml", "w");
1396         writeatom(fp);
1397         fclose(fp);
1398
1399         /* rename new cache file on success */
1400         if (cachefile && head) {
1401                 if (rename(tmppath, cachefile))
1402                         err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1403                 umask((mask = umask(0)));
1404                 if (chmod(cachefile,
1405                     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1406                         err(1, "chmod: '%s'", cachefile);
1407         }
1408
1409         /* cleanup */
1410         git_repository_free(repo);
1411         git_libgit2_shutdown();
1412
1413         return 0;
1414 }