stagit

static git page generator
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stagit.c (36274B)


      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 <string.h>
     12 #include <time.h>
     13 #include <unistd.h>
     14 
     15 #include <git2.h>
     16 
     17 #include "compat.h"
     18 
     19 #define LEN(s)    (sizeof(s)/sizeof(*s))
     20 
     21 struct deltainfo {
     22 	git_patch *patch;
     23 
     24 	size_t addcount;
     25 	size_t delcount;
     26 };
     27 
     28 struct commitinfo {
     29 	const git_oid *id;
     30 
     31 	char oid[GIT_OID_HEXSZ + 1];
     32 	char parentoid[GIT_OID_HEXSZ + 1];
     33 
     34 	const git_signature *author;
     35 	const git_signature *committer;
     36 	const char          *summary;
     37 	const char          *msg;
     38 
     39 	git_diff   *diff;
     40 	git_commit *commit;
     41 	git_commit *parent;
     42 	git_tree   *commit_tree;
     43 	git_tree   *parent_tree;
     44 
     45 	size_t addcount;
     46 	size_t delcount;
     47 	size_t filecount;
     48 
     49 	struct deltainfo **deltas;
     50 	size_t ndeltas;
     51 };
     52 
     53 /* reference and associated data for sorting */
     54 struct referenceinfo {
     55 	struct git_reference *ref;
     56 	struct commitinfo *ci;
     57 };
     58 
     59 static git_repository *repo;
     60 
     61 static const char *baseurl = ""; /* base URL to make absolute RSS/Atom URI */
     62 static const char *relpath = "";
     63 static const char *repodir;
     64 
     65 static char *name = "";
     66 static char *strippedname = "";
     67 static char description[255];
     68 static char cloneurl[1024];
     69 static char *submodules;
     70 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
     71 static char *license;
     72 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
     73 static char *readme;
     74 static long long nlogcommits = -1; /* -1 indicates not used */
     75 
     76 /* cache */
     77 static git_oid lastoid;
     78 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
     79 static FILE *rcachefp, *wcachefp;
     80 static const char *cachefile;
     81 
     82 /* Handle read or write errors for a FILE * stream */
     83 void
     84 checkfileerror(FILE *fp, const char *name, int mode)
     85 {
     86 	if (mode == 'r' && ferror(fp))
     87 		errx(1, "read error: %s", name);
     88 	else if (mode == 'w' && (fflush(fp) || ferror(fp)))
     89 		errx(1, "write error: %s", name);
     90 }
     91 
     92 void
     93 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
     94 {
     95 	int r;
     96 
     97 	r = snprintf(buf, bufsiz, "%s%s%s",
     98 		path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
     99 	if (r < 0 || (size_t)r >= bufsiz)
    100 		errx(1, "path truncated: '%s%s%s'",
    101 			path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
    102 }
    103 
    104 void
    105 deltainfo_free(struct deltainfo *di)
    106 {
    107 	if (!di)
    108 		return;
    109 	git_patch_free(di->patch);
    110 	memset(di, 0, sizeof(*di));
    111 	free(di);
    112 }
    113 
    114 int
    115 commitinfo_getstats(struct commitinfo *ci)
    116 {
    117 	struct deltainfo *di;
    118 	git_diff_options opts;
    119 	git_diff_find_options fopts;
    120 	const git_diff_delta *delta;
    121 	const git_diff_hunk *hunk;
    122 	const git_diff_line *line;
    123 	git_patch *patch = NULL;
    124 	size_t ndeltas, nhunks, nhunklines;
    125 	size_t i, j, k;
    126 
    127 	if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
    128 		goto err;
    129 	if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
    130 		if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
    131 			ci->parent = NULL;
    132 			ci->parent_tree = NULL;
    133 		}
    134 	}
    135 
    136 	git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
    137 	opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
    138 	              GIT_DIFF_IGNORE_SUBMODULES |
    139 		      GIT_DIFF_INCLUDE_TYPECHANGE;
    140 	if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
    141 		goto err;
    142 
    143 	if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
    144 		goto err;
    145 	/* find renames and copies, exact matches (no heuristic) for renames. */
    146 	fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
    147 	               GIT_DIFF_FIND_EXACT_MATCH_ONLY;
    148 	if (git_diff_find_similar(ci->diff, &fopts))
    149 		goto err;
    150 
    151 	ndeltas = git_diff_num_deltas(ci->diff);
    152 	if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
    153 		err(1, "calloc");
    154 
    155 	for (i = 0; i < ndeltas; i++) {
    156 		if (git_patch_from_diff(&patch, ci->diff, i))
    157 			goto err;
    158 
    159 		if (!(di = calloc(1, sizeof(struct deltainfo))))
    160 			err(1, "calloc");
    161 		di->patch = patch;
    162 		ci->deltas[i] = di;
    163 
    164 		delta = git_patch_get_delta(patch);
    165 
    166 		/* skip stats for binary data */
    167 		if (delta->flags & GIT_DIFF_FLAG_BINARY)
    168 			continue;
    169 
    170 		nhunks = git_patch_num_hunks(patch);
    171 		for (j = 0; j < nhunks; j++) {
    172 			if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
    173 				break;
    174 			for (k = 0; ; k++) {
    175 				if (git_patch_get_line_in_hunk(&line, patch, j, k))
    176 					break;
    177 				if (line->old_lineno == -1) {
    178 					di->addcount++;
    179 					ci->addcount++;
    180 				} else if (line->new_lineno == -1) {
    181 					di->delcount++;
    182 					ci->delcount++;
    183 				}
    184 			}
    185 		}
    186 	}
    187 	ci->ndeltas = i;
    188 	ci->filecount = i;
    189 
    190 	return 0;
    191 
    192 err:
    193 	git_diff_free(ci->diff);
    194 	ci->diff = NULL;
    195 	git_tree_free(ci->commit_tree);
    196 	ci->commit_tree = NULL;
    197 	git_tree_free(ci->parent_tree);
    198 	ci->parent_tree = NULL;
    199 	git_commit_free(ci->parent);
    200 	ci->parent = NULL;
    201 
    202 	if (ci->deltas)
    203 		for (i = 0; i < ci->ndeltas; i++)
    204 			deltainfo_free(ci->deltas[i]);
    205 	free(ci->deltas);
    206 	ci->deltas = NULL;
    207 	ci->ndeltas = 0;
    208 	ci->addcount = 0;
    209 	ci->delcount = 0;
    210 	ci->filecount = 0;
    211 
    212 	return -1;
    213 }
    214 
    215 void
    216 commitinfo_free(struct commitinfo *ci)
    217 {
    218 	size_t i;
    219 
    220 	if (!ci)
    221 		return;
    222 	if (ci->deltas)
    223 		for (i = 0; i < ci->ndeltas; i++)
    224 			deltainfo_free(ci->deltas[i]);
    225 
    226 	free(ci->deltas);
    227 	git_diff_free(ci->diff);
    228 	git_tree_free(ci->commit_tree);
    229 	git_tree_free(ci->parent_tree);
    230 	git_commit_free(ci->commit);
    231 	git_commit_free(ci->parent);
    232 	memset(ci, 0, sizeof(*ci));
    233 	free(ci);
    234 }
    235 
    236 struct commitinfo *
    237 commitinfo_getbyoid(const git_oid *id)
    238 {
    239 	struct commitinfo *ci;
    240 
    241 	if (!(ci = calloc(1, sizeof(struct commitinfo))))
    242 		err(1, "calloc");
    243 
    244 	if (git_commit_lookup(&(ci->commit), repo, id))
    245 		goto err;
    246 	ci->id = id;
    247 
    248 	git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
    249 	git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
    250 
    251 	ci->author = git_commit_author(ci->commit);
    252 	ci->committer = git_commit_committer(ci->commit);
    253 	ci->summary = git_commit_summary(ci->commit);
    254 	ci->msg = git_commit_message(ci->commit);
    255 
    256 	return ci;
    257 
    258 err:
    259 	commitinfo_free(ci);
    260 
    261 	return NULL;
    262 }
    263 
    264 int
    265 refs_cmp(const void *v1, const void *v2)
    266 {
    267 	const struct referenceinfo *r1 = v1, *r2 = v2;
    268 	time_t t1, t2;
    269 	int r;
    270 
    271 	if ((r = git_reference_is_tag(r1->ref) - git_reference_is_tag(r2->ref)))
    272 		return r;
    273 
    274 	t1 = r1->ci->author ? r1->ci->author->when.time : 0;
    275 	t2 = r2->ci->author ? r2->ci->author->when.time : 0;
    276 	if ((r = t1 > t2 ? -1 : (t1 == t2 ? 0 : 1)))
    277 		return r;
    278 
    279 	return strcmp(git_reference_shorthand(r1->ref),
    280 	              git_reference_shorthand(r2->ref));
    281 }
    282 
    283 int
    284 getrefs(struct referenceinfo **pris, size_t *prefcount)
    285 {
    286 	struct referenceinfo *ris = NULL;
    287 	struct commitinfo *ci = NULL;
    288 	git_reference_iterator *it = NULL;
    289 	const git_oid *id = NULL;
    290 	git_object *obj = NULL;
    291 	git_reference *dref = NULL, *r, *ref = NULL;
    292 	size_t i, refcount;
    293 
    294 	*pris = NULL;
    295 	*prefcount = 0;
    296 
    297 	if (git_reference_iterator_new(&it, repo))
    298 		return -1;
    299 
    300 	for (refcount = 0; !git_reference_next(&ref, it); ) {
    301 		if (!git_reference_is_branch(ref) && !git_reference_is_tag(ref)) {
    302 			git_reference_free(ref);
    303 			ref = NULL;
    304 			continue;
    305 		}
    306 
    307 		switch (git_reference_type(ref)) {
    308 		case GIT_REF_SYMBOLIC:
    309 			if (git_reference_resolve(&dref, ref))
    310 				goto err;
    311 			r = dref;
    312 			break;
    313 		case GIT_REF_OID:
    314 			r = ref;
    315 			break;
    316 		default:
    317 			continue;
    318 		}
    319 		if (!git_reference_target(r) ||
    320 		    git_reference_peel(&obj, r, GIT_OBJ_ANY))
    321 			goto err;
    322 		if (!(id = git_object_id(obj)))
    323 			goto err;
    324 		if (!(ci = commitinfo_getbyoid(id)))
    325 			break;
    326 
    327 		if (!(ris = reallocarray(ris, refcount + 1, sizeof(*ris))))
    328 			err(1, "realloc");
    329 		ris[refcount].ci = ci;
    330 		ris[refcount].ref = r;
    331 		refcount++;
    332 
    333 		git_object_free(obj);
    334 		obj = NULL;
    335 		git_reference_free(dref);
    336 		dref = NULL;
    337 	}
    338 	git_reference_iterator_free(it);
    339 
    340 	/* sort by type, date then shorthand name */
    341 	qsort(ris, refcount, sizeof(*ris), refs_cmp);
    342 
    343 	*pris = ris;
    344 	*prefcount = refcount;
    345 
    346 	return 0;
    347 
    348 err:
    349 	git_object_free(obj);
    350 	git_reference_free(dref);
    351 	commitinfo_free(ci);
    352 	for (i = 0; i < refcount; i++) {
    353 		commitinfo_free(ris[i].ci);
    354 		git_reference_free(ris[i].ref);
    355 	}
    356 	free(ris);
    357 
    358 	return -1;
    359 }
    360 
    361 FILE *
    362 efopen(const char *filename, const char *flags)
    363 {
    364 	FILE *fp;
    365 
    366 	if (!(fp = fopen(filename, flags)))
    367 		err(1, "fopen: '%s'", filename);
    368 
    369 	return fp;
    370 }
    371 
    372 /* Percent-encode, see RFC3986 section 2.1. */
    373 void
    374 percentencode(FILE *fp, const char *s, size_t len)
    375 {
    376 	static char tab[] = "0123456789ABCDEF";
    377 	unsigned char uc;
    378 	size_t i;
    379 
    380 	for (i = 0; *s && i < len; s++, i++) {
    381 		uc = *s;
    382 		/* NOTE: do not encode '/' for paths or ",-." */
    383 		if (uc < ',' || uc >= 127 || (uc >= ':' && uc <= '@') ||
    384 		    uc == '[' || uc == ']') {
    385 			putc('%', fp);
    386 			putc(tab[(uc >> 4) & 0x0f], fp);
    387 			putc(tab[uc & 0x0f], fp);
    388 		} else {
    389 			putc(uc, fp);
    390 		}
    391 	}
    392 }
    393 
    394 /* Escape characters below as HTML 2.0 / XML 1.0. */
    395 void
    396 xmlencode(FILE *fp, const char *s, size_t len)
    397 {
    398 	size_t i;
    399 
    400 	for (i = 0; *s && i < len; s++, i++) {
    401 		switch(*s) {
    402 		case '<':  fputs("&lt;",   fp); break;
    403 		case '>':  fputs("&gt;",   fp); break;
    404 		case '\'': fputs("&#39;",  fp); break;
    405 		case '&':  fputs("&amp;",  fp); break;
    406 		case '"':  fputs("&quot;", fp); break;
    407 		default:   putc(*s, fp);
    408 		}
    409 	}
    410 }
    411 
    412 /* Escape characters below as HTML 2.0 / XML 1.0, ignore printing '\r', '\n' */
    413 void
    414 xmlencodeline(FILE *fp, const char *s, size_t len)
    415 {
    416 	size_t i;
    417 
    418 	for (i = 0; *s && i < len; s++, i++) {
    419 		switch(*s) {
    420 		case '<':  fputs("&lt;",   fp); break;
    421 		case '>':  fputs("&gt;",   fp); break;
    422 		case '\'': fputs("&#39;",  fp); break;
    423 		case '&':  fputs("&amp;",  fp); break;
    424 		case '"':  fputs("&quot;", fp); break;
    425 		case '\r': break; /* ignore CR */
    426 		case '\n': break; /* ignore LF */
    427 		default:   putc(*s, fp);
    428 		}
    429 	}
    430 }
    431 
    432 int
    433 mkdirp(const char *path)
    434 {
    435 	char tmp[PATH_MAX], *p;
    436 
    437 	if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
    438 		errx(1, "path truncated: '%s'", path);
    439 	for (p = tmp + (tmp[0] == '/'); *p; p++) {
    440 		if (*p != '/')
    441 			continue;
    442 		*p = '\0';
    443 		if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
    444 			return -1;
    445 		*p = '/';
    446 	}
    447 	if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
    448 		return -1;
    449 	return 0;
    450 }
    451 
    452 void
    453 printtimez(FILE *fp, const git_time *intime)
    454 {
    455 	struct tm *intm;
    456 	time_t t;
    457 	char out[32];
    458 
    459 	t = (time_t)intime->time;
    460 	if (!(intm = gmtime(&t)))
    461 		return;
    462 	strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
    463 	fputs(out, fp);
    464 }
    465 
    466 void
    467 printtime(FILE *fp, const git_time *intime)
    468 {
    469 	struct tm *intm;
    470 	time_t t;
    471 	char out[32];
    472 
    473 	t = (time_t)intime->time + (intime->offset * 60);
    474 	if (!(intm = gmtime(&t)))
    475 		return;
    476 	strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
    477 	if (intime->offset < 0)
    478 		fprintf(fp, "%s -%02d%02d", out,
    479 		            -(intime->offset) / 60, -(intime->offset) % 60);
    480 	else
    481 		fprintf(fp, "%s +%02d%02d", out,
    482 		            intime->offset / 60, intime->offset % 60);
    483 }
    484 
    485 void
    486 printtimeshort(FILE *fp, const git_time *intime)
    487 {
    488 	struct tm *intm;
    489 	time_t t;
    490 	char out[32];
    491 
    492 	t = (time_t)intime->time;
    493 	if (!(intm = gmtime(&t)))
    494 		return;
    495 	strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
    496 	fputs(out, fp);
    497 }
    498 
    499 void
    500 writeheader(FILE *fp, const char *title)
    501 {
    502 	fputs("<!DOCTYPE html>\n"
    503 		"<html>\n<head>\n"
    504 		"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\" />\n"
    505 		"<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\" />\n"
    506 		"<title>", fp);
    507 	xmlencode(fp, title, strlen(title));
    508 	if (title[0] && strippedname[0])
    509 		fputs(" - ", fp);
    510 	xmlencode(fp, strippedname, strlen(strippedname));
    511 	if (description[0])
    512 		fputs(" - ", fp);
    513 	xmlencode(fp, description, strlen(description));
    514 	fprintf(fp, "</title>\n<link rel=\"icon\" type=\"image/png\" href=\"%sfavicon.png\" />\n", relpath);
    515 	fputs("<link rel=\"alternate\" type=\"application/atom+xml\" title=\"", fp);
    516 	xmlencode(fp, name, strlen(name));
    517 	fprintf(fp, " Atom Feed\" href=\"%satom.xml\" />\n", relpath);
    518 	fputs("<link rel=\"alternate\" type=\"application/atom+xml\" title=\"", fp);
    519 	xmlencode(fp, name, strlen(name));
    520 	fprintf(fp, " Atom Feed (tags)\" href=\"%stags.xml\" />\n", relpath);
    521 	fprintf(fp, "<link rel=\"stylesheet\" type=\"text/css\" href=\"%sstyle.css\" />\n", relpath);
    522 	fputs("</head>\n<body>\n<table><tr><td>", fp);
    523 	fprintf(fp, "<a href=\"../%s\"><img src=\"%slogo.png\" alt=\"\" width=\"32\" height=\"32\" /></a>",
    524 	        relpath, relpath);
    525 	fputs("</td><td><h1>", fp);
    526 	xmlencode(fp, strippedname, strlen(strippedname));
    527 	fputs("</h1><span class=\"desc\">", fp);
    528 	xmlencode(fp, description, strlen(description));
    529 	fputs("</span></td></tr>", fp);
    530 	if (cloneurl[0]) {
    531 		fputs("<tr class=\"url\"><td></td><td>git clone <a href=\"", fp);
    532 		xmlencode(fp, cloneurl, strlen(cloneurl)); /* not percent-encoded */
    533 		fputs("\">", fp);
    534 		xmlencode(fp, cloneurl, strlen(cloneurl));
    535 		fputs("</a></td></tr>", fp);
    536 	}
    537 	fputs("<tr><td></td><td>\n", fp);
    538 	fprintf(fp, "<a href=\"%slog.html\">Log</a> | ", relpath);
    539 	fprintf(fp, "<a href=\"%sfiles.html\">Files</a> | ", relpath);
    540 	fprintf(fp, "<a href=\"%srefs.html\">Refs</a>", relpath);
    541 	if (submodules)
    542 		fprintf(fp, " | <a href=\"%sfile/%s.html\">Submodules</a>",
    543 		        relpath, submodules);
    544 	if (readme)
    545 		fprintf(fp, " | <a href=\"%sfile/%s.html\">README</a>",
    546 		        relpath, readme);
    547 	if (license)
    548 		fprintf(fp, " | <a href=\"%sfile/%s.html\">LICENSE</a>",
    549 		        relpath, license);
    550 	fputs("</td></tr></table>\n<hr/>\n<div id=\"content\">\n", fp);
    551 }
    552 
    553 void
    554 writefooter(FILE *fp)
    555 {
    556 	fputs("</div>\n</body>\n</html>\n", fp);
    557 }
    558 
    559 size_t
    560 writeblobhtml(FILE *fp, const git_blob *blob)
    561 {
    562 	size_t n = 0, i, len, prev;
    563 	const char *nfmt = "<a href=\"#l%zu\" class=\"line\" id=\"l%zu\">%7zu</a> ";
    564 	const char *s = git_blob_rawcontent(blob);
    565 
    566 	len = git_blob_rawsize(blob);
    567 	fputs("<pre id=\"blob\">\n", fp);
    568 
    569 	if (len > 0) {
    570 		for (i = 0, prev = 0; i < len; i++) {
    571 			if (s[i] != '\n')
    572 				continue;
    573 			n++;
    574 			fprintf(fp, nfmt, n, n, n);
    575 			xmlencodeline(fp, &s[prev], i - prev + 1);
    576 			putc('\n', fp);
    577 			prev = i + 1;
    578 		}
    579 		/* trailing data */
    580 		if ((len - prev) > 0) {
    581 			n++;
    582 			fprintf(fp, nfmt, n, n, n);
    583 			xmlencodeline(fp, &s[prev], len - prev);
    584 		}
    585 	}
    586 
    587 	fputs("</pre>\n", fp);
    588 
    589 	return n;
    590 }
    591 
    592 void
    593 printcommit(FILE *fp, struct commitinfo *ci)
    594 {
    595 	fprintf(fp, "<b>commit</b> <a href=\"%scommit/%s.html\">%s</a>\n",
    596 		relpath, ci->oid, ci->oid);
    597 
    598 	if (ci->parentoid[0])
    599 		fprintf(fp, "<b>parent</b> <a href=\"%scommit/%s.html\">%s</a>\n",
    600 			relpath, ci->parentoid, ci->parentoid);
    601 
    602 	if (ci->author) {
    603 		fputs("<b>Author:</b> ", fp);
    604 		xmlencode(fp, ci->author->name, strlen(ci->author->name));
    605 		fputs(" &lt;<a href=\"mailto:", fp);
    606 		xmlencode(fp, ci->author->email, strlen(ci->author->email)); /* not percent-encoded */
    607 		fputs("\">", fp);
    608 		xmlencode(fp, ci->author->email, strlen(ci->author->email));
    609 		fputs("</a>&gt;\n<b>Date:</b>   ", fp);
    610 		printtime(fp, &(ci->author->when));
    611 		putc('\n', fp);
    612 	}
    613 	if (ci->msg) {
    614 		putc('\n', fp);
    615 		xmlencode(fp, ci->msg, strlen(ci->msg));
    616 		putc('\n', fp);
    617 	}
    618 }
    619 
    620 void
    621 printshowfile(FILE *fp, struct commitinfo *ci)
    622 {
    623 	const git_diff_delta *delta;
    624 	const git_diff_hunk *hunk;
    625 	const git_diff_line *line;
    626 	git_patch *patch;
    627 	size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
    628 	char linestr[80];
    629 	int c;
    630 
    631 	printcommit(fp, ci);
    632 
    633 	if (!ci->deltas)
    634 		return;
    635 
    636 	if (ci->filecount > 1000   ||
    637 	    ci->ndeltas   > 1000   ||
    638 	    ci->addcount  > 100000 ||
    639 	    ci->delcount  > 100000) {
    640 		fputs("Diff is too large, output suppressed.\n", fp);
    641 		return;
    642 	}
    643 
    644 	/* diff stat */
    645 	fputs("<b>Diffstat:</b>\n<table>", fp);
    646 	for (i = 0; i < ci->ndeltas; i++) {
    647 		delta = git_patch_get_delta(ci->deltas[i]->patch);
    648 
    649 		switch (delta->status) {
    650 		case GIT_DELTA_ADDED:      c = 'A'; break;
    651 		case GIT_DELTA_COPIED:     c = 'C'; break;
    652 		case GIT_DELTA_DELETED:    c = 'D'; break;
    653 		case GIT_DELTA_MODIFIED:   c = 'M'; break;
    654 		case GIT_DELTA_RENAMED:    c = 'R'; break;
    655 		case GIT_DELTA_TYPECHANGE: c = 'T'; break;
    656 		default:                   c = ' '; break;
    657 		}
    658 		if (c == ' ')
    659 			fprintf(fp, "<tr><td>%c", c);
    660 		else
    661 			fprintf(fp, "<tr><td class=\"%c\">%c", c, c);
    662 
    663 		fprintf(fp, "</td><td><a href=\"#h%zu\">", i);
    664 		xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
    665 		if (strcmp(delta->old_file.path, delta->new_file.path)) {
    666 			fputs(" -&gt; ", fp);
    667 			xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
    668 		}
    669 
    670 		add = ci->deltas[i]->addcount;
    671 		del = ci->deltas[i]->delcount;
    672 		changed = add + del;
    673 		total = sizeof(linestr) - 2;
    674 		if (changed > total) {
    675 			if (add)
    676 				add = ((float)total / changed * add) + 1;
    677 			if (del)
    678 				del = ((float)total / changed * del) + 1;
    679 		}
    680 		memset(&linestr, '+', add);
    681 		memset(&linestr[add], '-', del);
    682 
    683 		fprintf(fp, "</a></td><td> | </td><td class=\"num\">%zu</td><td><span class=\"i\">",
    684 		        ci->deltas[i]->addcount + ci->deltas[i]->delcount);
    685 		fwrite(&linestr, 1, add, fp);
    686 		fputs("</span><span class=\"d\">", fp);
    687 		fwrite(&linestr[add], 1, del, fp);
    688 		fputs("</span></td></tr>\n", fp);
    689 	}
    690 	fprintf(fp, "</table></pre><pre>%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
    691 		ci->filecount, ci->filecount == 1 ? "" : "s",
    692 	        ci->addcount,  ci->addcount  == 1 ? "" : "s",
    693 	        ci->delcount,  ci->delcount  == 1 ? "" : "s");
    694 
    695 	fputs("<hr/>", fp);
    696 
    697 	for (i = 0; i < ci->ndeltas; i++) {
    698 		patch = ci->deltas[i]->patch;
    699 		delta = git_patch_get_delta(patch);
    700 		fprintf(fp, "<b>diff --git a/<a id=\"h%zu\" href=\"%sfile/", i, relpath);
    701 		percentencode(fp, delta->old_file.path, strlen(delta->old_file.path));
    702 		fputs(".html\">", fp);
    703 		xmlencode(fp, delta->old_file.path, strlen(delta->old_file.path));
    704 		fprintf(fp, "</a> b/<a href=\"%sfile/", relpath);
    705 		percentencode(fp, delta->new_file.path, strlen(delta->new_file.path));
    706 		fprintf(fp, ".html\">");
    707 		xmlencode(fp, delta->new_file.path, strlen(delta->new_file.path));
    708 		fprintf(fp, "</a></b>\n");
    709 
    710 		/* check binary data */
    711 		if (delta->flags & GIT_DIFF_FLAG_BINARY) {
    712 			fputs("Binary files differ.\n", fp);
    713 			continue;
    714 		}
    715 
    716 		nhunks = git_patch_num_hunks(patch);
    717 		for (j = 0; j < nhunks; j++) {
    718 			if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
    719 				break;
    720 
    721 			fprintf(fp, "<a href=\"#h%zu-%zu\" id=\"h%zu-%zu\" class=\"h\">", i, j, i, j);
    722 			xmlencode(fp, hunk->header, hunk->header_len);
    723 			fputs("</a>", fp);
    724 
    725 			for (k = 0; ; k++) {
    726 				if (git_patch_get_line_in_hunk(&line, patch, j, k))
    727 					break;
    728 				if (line->old_lineno == -1)
    729 					fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"i\">+",
    730 						i, j, k, i, j, k);
    731 				else if (line->new_lineno == -1)
    732 					fprintf(fp, "<a href=\"#h%zu-%zu-%zu\" id=\"h%zu-%zu-%zu\" class=\"d\">-",
    733 						i, j, k, i, j, k);
    734 				else
    735 					putc(' ', fp);
    736 				xmlencodeline(fp, line->content, line->content_len);
    737 				putc('\n', fp);
    738 				if (line->old_lineno == -1 || line->new_lineno == -1)
    739 					fputs("</a>", fp);
    740 			}
    741 		}
    742 	}
    743 }
    744 
    745 void
    746 writelogline(FILE *fp, struct commitinfo *ci)
    747 {
    748 	fputs("<tr><td>", fp);
    749 	if (ci->author)
    750 		printtimeshort(fp, &(ci->author->when));
    751 	fputs("</td><td>", fp);
    752 	if (ci->summary) {
    753 		fprintf(fp, "<a href=\"%scommit/%s.html\">", relpath, ci->oid);
    754 		xmlencode(fp, ci->summary, strlen(ci->summary));
    755 		fputs("</a>", fp);
    756 	}
    757 	fputs("</td><td>", fp);
    758 	if (ci->author)
    759 		xmlencode(fp, ci->author->name, strlen(ci->author->name));
    760 	fputs("</td><td class=\"num\" align=\"right\">", fp);
    761 	fprintf(fp, "%zu", ci->filecount);
    762 	fputs("</td><td class=\"num\" align=\"right\">", fp);
    763 	fprintf(fp, "+%zu", ci->addcount);
    764 	fputs("</td><td class=\"num\" align=\"right\">", fp);
    765 	fprintf(fp, "-%zu", ci->delcount);
    766 	fputs("</td></tr>\n", fp);
    767 }
    768 
    769 int
    770 writelog(FILE *fp, const git_oid *oid)
    771 {
    772 	struct commitinfo *ci;
    773 	git_revwalk *w = NULL;
    774 	git_oid id;
    775 	char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
    776 	FILE *fpfile;
    777 	size_t remcommits = 0;
    778 	int r;
    779 
    780 	git_revwalk_new(&w, repo);
    781 	git_revwalk_push(w, oid);
    782 
    783 	while (!git_revwalk_next(&id, w)) {
    784 		relpath = "";
    785 
    786 		if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
    787 			break;
    788 
    789 		git_oid_tostr(oidstr, sizeof(oidstr), &id);
    790 		r = snprintf(path, sizeof(path), "commit/%s.html", oidstr);
    791 		if (r < 0 || (size_t)r >= sizeof(path))
    792 			errx(1, "path truncated: 'commit/%s.html'", oidstr);
    793 		r = access(path, F_OK);
    794 
    795 		/* optimization: if there are no log lines to write and
    796 		   the commit file already exists: skip the diffstat */
    797 		if (!nlogcommits) {
    798 			remcommits++;
    799 			if (!r)
    800 				continue;
    801 		}
    802 
    803 		if (!(ci = commitinfo_getbyoid(&id)))
    804 			break;
    805 		/* diffstat: for stagit HTML required for the log.html line */
    806 		if (commitinfo_getstats(ci) == -1)
    807 			goto err;
    808 
    809 		if (nlogcommits != 0) {
    810 			writelogline(fp, ci);
    811 			if (nlogcommits > 0)
    812 				nlogcommits--;
    813 		}
    814 
    815 		if (cachefile)
    816 			writelogline(wcachefp, ci);
    817 
    818 		/* check if file exists if so skip it */
    819 		if (r) {
    820 			relpath = "../";
    821 			fpfile = efopen(path, "w");
    822 			writeheader(fpfile, ci->summary);
    823 			fputs("<pre>", fpfile);
    824 			printshowfile(fpfile, ci);
    825 			fputs("</pre>\n", fpfile);
    826 			writefooter(fpfile);
    827 			checkfileerror(fpfile, path, 'w');
    828 			fclose(fpfile);
    829 		}
    830 err:
    831 		commitinfo_free(ci);
    832 	}
    833 	git_revwalk_free(w);
    834 
    835 	if (nlogcommits == 0 && remcommits != 0) {
    836 		fprintf(fp, "<tr><td></td><td colspan=\"5\">"
    837 		        "%zu more commits remaining, fetch the repository"
    838 		        "</td></tr>\n", remcommits);
    839 	}
    840 
    841 	relpath = "";
    842 
    843 	return 0;
    844 }
    845 
    846 void
    847 printcommitatom(FILE *fp, struct commitinfo *ci, const char *tag)
    848 {
    849 	fputs("<entry>\n", fp);
    850 
    851 	fprintf(fp, "<id>%s</id>\n", ci->oid);
    852 	if (ci->author) {
    853 		fputs("<published>", fp);
    854 		printtimez(fp, &(ci->author->when));
    855 		fputs("</published>\n", fp);
    856 	}
    857 	if (ci->committer) {
    858 		fputs("<updated>", fp);
    859 		printtimez(fp, &(ci->committer->when));
    860 		fputs("</updated>\n", fp);
    861 	}
    862 	if (ci->summary) {
    863 		fputs("<title type=\"text\">", fp);
    864 		if (tag && tag[0]) {
    865 			fputs("[", fp);
    866 			xmlencode(fp, tag, strlen(tag));
    867 			fputs("] ", fp);
    868 		}
    869 		xmlencode(fp, ci->summary, strlen(ci->summary));
    870 		fputs("</title>\n", fp);
    871 	}
    872 	fprintf(fp, "<link rel=\"alternate\" type=\"text/html\" href=\"%scommit/%s.html\" />\n",
    873 	        baseurl, ci->oid);
    874 
    875 	if (ci->author) {
    876 		fputs("<author>\n<name>", fp);
    877 		xmlencode(fp, ci->author->name, strlen(ci->author->name));
    878 		fputs("</name>\n<email>", fp);
    879 		xmlencode(fp, ci->author->email, strlen(ci->author->email));
    880 		fputs("</email>\n</author>\n", fp);
    881 	}
    882 
    883 	fputs("<content type=\"text\">", fp);
    884 	fprintf(fp, "commit %s\n", ci->oid);
    885 	if (ci->parentoid[0])
    886 		fprintf(fp, "parent %s\n", ci->parentoid);
    887 	if (ci->author) {
    888 		fputs("Author: ", fp);
    889 		xmlencode(fp, ci->author->name, strlen(ci->author->name));
    890 		fputs(" &lt;", fp);
    891 		xmlencode(fp, ci->author->email, strlen(ci->author->email));
    892 		fputs("&gt;\nDate:   ", fp);
    893 		printtime(fp, &(ci->author->when));
    894 		putc('\n', fp);
    895 	}
    896 	if (ci->msg) {
    897 		putc('\n', fp);
    898 		xmlencode(fp, ci->msg, strlen(ci->msg));
    899 	}
    900 	fputs("\n</content>\n</entry>\n", fp);
    901 }
    902 
    903 int
    904 writeatom(FILE *fp, int all)
    905 {
    906 	struct referenceinfo *ris = NULL;
    907 	size_t refcount = 0;
    908 	struct commitinfo *ci;
    909 	git_revwalk *w = NULL;
    910 	git_oid id;
    911 	size_t i, m = 100; /* last 'm' commits */
    912 
    913 	fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
    914 	      "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
    915 	xmlencode(fp, strippedname, strlen(strippedname));
    916 	fputs(", branch HEAD</title>\n<subtitle>", fp);
    917 	xmlencode(fp, description, strlen(description));
    918 	fputs("</subtitle>\n", fp);
    919 
    920 	/* all commits or only tags? */
    921 	if (all) {
    922 		git_revwalk_new(&w, repo);
    923 		git_revwalk_push_head(w);
    924 		for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
    925 			if (!(ci = commitinfo_getbyoid(&id)))
    926 				break;
    927 			printcommitatom(fp, ci, "");
    928 			commitinfo_free(ci);
    929 		}
    930 		git_revwalk_free(w);
    931 	} else if (getrefs(&ris, &refcount) != -1) {
    932 		/* references: tags */
    933 		for (i = 0; i < refcount; i++) {
    934 			if (git_reference_is_tag(ris[i].ref))
    935 				printcommitatom(fp, ris[i].ci,
    936 				                git_reference_shorthand(ris[i].ref));
    937 
    938 			commitinfo_free(ris[i].ci);
    939 			git_reference_free(ris[i].ref);
    940 		}
    941 		free(ris);
    942 	}
    943 
    944 	fputs("</feed>\n", fp);
    945 
    946 	return 0;
    947 }
    948 
    949 size_t
    950 writeblob(git_object *obj, const char *fpath, const char *filename, size_t filesize)
    951 {
    952 	char tmp[PATH_MAX] = "", *d;
    953 	const char *p;
    954 	size_t lc = 0;
    955 	FILE *fp;
    956 
    957 	if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
    958 		errx(1, "path truncated: '%s'", fpath);
    959 	if (!(d = dirname(tmp)))
    960 		err(1, "dirname");
    961 	if (mkdirp(d))
    962 		return -1;
    963 
    964 	for (p = fpath, tmp[0] = '\0'; *p; p++) {
    965 		if (*p == '/' && strlcat(tmp, "../", sizeof(tmp)) >= sizeof(tmp))
    966 			errx(1, "path truncated: '../%s'", tmp);
    967 	}
    968 	relpath = tmp;
    969 
    970 	fp = efopen(fpath, "w");
    971 	writeheader(fp, filename);
    972 	fputs("<p> ", fp);
    973 	xmlencode(fp, filename, strlen(filename));
    974 	fprintf(fp, " (%zuB)", filesize);
    975 	fputs("</p><hr/>", fp);
    976 
    977 	if (git_blob_is_binary((git_blob *)obj))
    978 		fputs("<p>Binary file.</p>\n", fp);
    979 	else
    980 		lc = writeblobhtml(fp, (git_blob *)obj);
    981 
    982 	writefooter(fp);
    983 	checkfileerror(fp, fpath, 'w');
    984 	fclose(fp);
    985 
    986 	relpath = "";
    987 
    988 	return lc;
    989 }
    990 
    991 const char *
    992 filemode(git_filemode_t m)
    993 {
    994 	static char mode[11];
    995 
    996 	memset(mode, '-', sizeof(mode) - 1);
    997 	mode[10] = '\0';
    998 
    999 	if (S_ISREG(m))
   1000 		mode[0] = '-';
   1001 	else if (S_ISBLK(m))
   1002 		mode[0] = 'b';
   1003 	else if (S_ISCHR(m))
   1004 		mode[0] = 'c';
   1005 	else if (S_ISDIR(m))
   1006 		mode[0] = 'd';
   1007 	else if (S_ISFIFO(m))
   1008 		mode[0] = 'p';
   1009 	else if (S_ISLNK(m))
   1010 		mode[0] = 'l';
   1011 	else if (S_ISSOCK(m))
   1012 		mode[0] = 's';
   1013 	else
   1014 		mode[0] = '?';
   1015 
   1016 	if (m & S_IRUSR) mode[1] = 'r';
   1017 	if (m & S_IWUSR) mode[2] = 'w';
   1018 	if (m & S_IXUSR) mode[3] = 'x';
   1019 	if (m & S_IRGRP) mode[4] = 'r';
   1020 	if (m & S_IWGRP) mode[5] = 'w';
   1021 	if (m & S_IXGRP) mode[6] = 'x';
   1022 	if (m & S_IROTH) mode[7] = 'r';
   1023 	if (m & S_IWOTH) mode[8] = 'w';
   1024 	if (m & S_IXOTH) mode[9] = 'x';
   1025 
   1026 	if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
   1027 	if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
   1028 	if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
   1029 
   1030 	return mode;
   1031 }
   1032 
   1033 int
   1034 writefilestree(FILE *fp, git_tree *tree, const char *path)
   1035 {
   1036 	const git_tree_entry *entry = NULL;
   1037 	git_object *obj = NULL;
   1038 	const char *entryname;
   1039 	char filepath[PATH_MAX], entrypath[PATH_MAX], oid[8];
   1040 	size_t count, i, lc, filesize;
   1041 	int r, ret;
   1042 
   1043 	count = git_tree_entrycount(tree);
   1044 	for (i = 0; i < count; i++) {
   1045 		if (!(entry = git_tree_entry_byindex(tree, i)) ||
   1046 		    !(entryname = git_tree_entry_name(entry)))
   1047 			return -1;
   1048 		joinpath(entrypath, sizeof(entrypath), path, entryname);
   1049 
   1050 		r = snprintf(filepath, sizeof(filepath), "file/%s.html",
   1051 		         entrypath);
   1052 		if (r < 0 || (size_t)r >= sizeof(filepath))
   1053 			errx(1, "path truncated: 'file/%s.html'", entrypath);
   1054 
   1055 		if (!git_tree_entry_to_object(&obj, repo, entry)) {
   1056 			switch (git_object_type(obj)) {
   1057 			case GIT_OBJ_BLOB:
   1058 				break;
   1059 			case GIT_OBJ_TREE:
   1060 				/* NOTE: recurses */
   1061 				ret = writefilestree(fp, (git_tree *)obj,
   1062 				                     entrypath);
   1063 				git_object_free(obj);
   1064 				if (ret)
   1065 					return ret;
   1066 				continue;
   1067 			default:
   1068 				git_object_free(obj);
   1069 				continue;
   1070 			}
   1071 
   1072 			filesize = git_blob_rawsize((git_blob *)obj);
   1073 			lc = writeblob(obj, filepath, entryname, filesize);
   1074 
   1075 			fputs("<tr><td>", fp);
   1076 			fputs(filemode(git_tree_entry_filemode(entry)), fp);
   1077 			fprintf(fp, "</td><td><a href=\"%s", relpath);
   1078 			percentencode(fp, filepath, strlen(filepath));
   1079 			fputs("\">", fp);
   1080 			xmlencode(fp, entrypath, strlen(entrypath));
   1081 			fputs("</a></td><td class=\"num\" align=\"right\">", fp);
   1082 			if (lc > 0)
   1083 				fprintf(fp, "%zuL", lc);
   1084 			else
   1085 				fprintf(fp, "%zuB", filesize);
   1086 			fputs("</td></tr>\n", fp);
   1087 			git_object_free(obj);
   1088 		} else if (git_tree_entry_type(entry) == GIT_OBJ_COMMIT) {
   1089 			/* commit object in tree is a submodule */
   1090 			fprintf(fp, "<tr><td>m---------</td><td><a href=\"%sfile/.gitmodules.html\">",
   1091 				relpath);
   1092 			xmlencode(fp, entrypath, strlen(entrypath));
   1093 			fputs("</a> @ ", fp);
   1094 			git_oid_tostr(oid, sizeof(oid), git_tree_entry_id(entry));
   1095 			xmlencode(fp, oid, strlen(oid));
   1096 			fputs("</td><td class=\"num\" align=\"right\"></td></tr>\n", fp);
   1097 		}
   1098 	}
   1099 
   1100 	return 0;
   1101 }
   1102 
   1103 int
   1104 writefiles(FILE *fp, const git_oid *id)
   1105 {
   1106 	git_tree *tree = NULL;
   1107 	git_commit *commit = NULL;
   1108 	int ret = -1;
   1109 
   1110 	fputs("<table id=\"files\"><thead>\n<tr>"
   1111 	      "<td><b>Mode</b></td><td><b>Name</b></td>"
   1112 	      "<td class=\"num\" align=\"right\"><b>Size</b></td>"
   1113 	      "</tr>\n</thead><tbody>\n", fp);
   1114 
   1115 	if (!git_commit_lookup(&commit, repo, id) &&
   1116 	    !git_commit_tree(&tree, commit))
   1117 		ret = writefilestree(fp, tree, "");
   1118 
   1119 	fputs("</tbody></table>", fp);
   1120 
   1121 	git_commit_free(commit);
   1122 	git_tree_free(tree);
   1123 
   1124 	return ret;
   1125 }
   1126 
   1127 int
   1128 writerefs(FILE *fp)
   1129 {
   1130 	struct referenceinfo *ris = NULL;
   1131 	struct commitinfo *ci;
   1132 	size_t count, i, j, refcount;
   1133 	const char *titles[] = { "Branches", "Tags" };
   1134 	const char *ids[] = { "branches", "tags" };
   1135 	const char *s;
   1136 
   1137 	if (getrefs(&ris, &refcount) == -1)
   1138 		return -1;
   1139 
   1140 	for (i = 0, j = 0, count = 0; i < refcount; i++) {
   1141 		if (j == 0 && git_reference_is_tag(ris[i].ref)) {
   1142 			if (count)
   1143 				fputs("</tbody></table><br/>\n", fp);
   1144 			count = 0;
   1145 			j = 1;
   1146 		}
   1147 
   1148 		/* print header if it has an entry (first). */
   1149 		if (++count == 1) {
   1150 			fprintf(fp, "<h2>%s</h2><table id=\"%s\">"
   1151 		                "<thead>\n<tr><td><b>Name</b></td>"
   1152 			        "<td><b>Last commit date</b></td>"
   1153 			        "<td><b>Author</b></td>\n</tr>\n"
   1154 			        "</thead><tbody>\n",
   1155 			         titles[j], ids[j]);
   1156 		}
   1157 
   1158 		ci = ris[i].ci;
   1159 		s = git_reference_shorthand(ris[i].ref);
   1160 
   1161 		fputs("<tr><td>", fp);
   1162 		xmlencode(fp, s, strlen(s));
   1163 		fputs("</td><td>", fp);
   1164 		if (ci->author)
   1165 			printtimeshort(fp, &(ci->author->when));
   1166 		fputs("</td><td>", fp);
   1167 		if (ci->author)
   1168 			xmlencode(fp, ci->author->name, strlen(ci->author->name));
   1169 		fputs("</td></tr>\n", fp);
   1170 	}
   1171 	/* table footer */
   1172 	if (count)
   1173 		fputs("</tbody></table><br/>\n", fp);
   1174 
   1175 	for (i = 0; i < refcount; i++) {
   1176 		commitinfo_free(ris[i].ci);
   1177 		git_reference_free(ris[i].ref);
   1178 	}
   1179 	free(ris);
   1180 
   1181 	return 0;
   1182 }
   1183 
   1184 void
   1185 usage(char *argv0)
   1186 {
   1187 	fprintf(stderr, "usage: %s [-c cachefile | -l commits] "
   1188 	        "[-u baseurl] repodir\n", argv0);
   1189 	exit(1);
   1190 }
   1191 
   1192 int
   1193 main(int argc, char *argv[])
   1194 {
   1195 	git_object *obj = NULL;
   1196 	const git_oid *head = NULL;
   1197 	mode_t mask;
   1198 	FILE *fp, *fpread;
   1199 	char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
   1200 	char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
   1201 	size_t n;
   1202 	int i, fd;
   1203 
   1204 	for (i = 1; i < argc; i++) {
   1205 		if (argv[i][0] != '-') {
   1206 			if (repodir)
   1207 				usage(argv[0]);
   1208 			repodir = argv[i];
   1209 		} else if (argv[i][1] == 'c') {
   1210 			if (nlogcommits > 0 || i + 1 >= argc)
   1211 				usage(argv[0]);
   1212 			cachefile = argv[++i];
   1213 		} else if (argv[i][1] == 'l') {
   1214 			if (cachefile || i + 1 >= argc)
   1215 				usage(argv[0]);
   1216 			errno = 0;
   1217 			nlogcommits = strtoll(argv[++i], &p, 10);
   1218 			if (argv[i][0] == '\0' || *p != '\0' ||
   1219 			    nlogcommits <= 0 || errno)
   1220 				usage(argv[0]);
   1221 		} else if (argv[i][1] == 'u') {
   1222 			if (i + 1 >= argc)
   1223 				usage(argv[0]);
   1224 			baseurl = argv[++i];
   1225 		}
   1226 	}
   1227 	if (!repodir)
   1228 		usage(argv[0]);
   1229 
   1230 	if (!realpath(repodir, repodirabs))
   1231 		err(1, "realpath");
   1232 
   1233 	/* do not search outside the git repository:
   1234 	   GIT_CONFIG_LEVEL_APP is the highest level currently */
   1235 	git_libgit2_init();
   1236 	for (i = 1; i <= GIT_CONFIG_LEVEL_APP; i++)
   1237 		git_libgit2_opts(GIT_OPT_SET_SEARCH_PATH, i, "");
   1238 	/* do not require the git repository to be owned by the current user */
   1239 	git_libgit2_opts(GIT_OPT_SET_OWNER_VALIDATION, 0);
   1240 
   1241 #ifdef __OpenBSD__
   1242 	if (unveil(repodir, "r") == -1)
   1243 		err(1, "unveil: %s", repodir);
   1244 	if (unveil(".", "rwc") == -1)
   1245 		err(1, "unveil: .");
   1246 	if (cachefile && unveil(cachefile, "rwc") == -1)
   1247 		err(1, "unveil: %s", cachefile);
   1248 
   1249 	if (cachefile) {
   1250 		if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
   1251 			err(1, "pledge");
   1252 	} else {
   1253 		if (pledge("stdio rpath wpath cpath", NULL) == -1)
   1254 			err(1, "pledge");
   1255 	}
   1256 #endif
   1257 
   1258 	if (git_repository_open_ext(&repo, repodir,
   1259 		GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
   1260 		fprintf(stderr, "%s: cannot open repository\n", argv[0]);
   1261 		return 1;
   1262 	}
   1263 
   1264 	/* find HEAD */
   1265 	if (!git_revparse_single(&obj, repo, "HEAD"))
   1266 		head = git_object_id(obj);
   1267 	git_object_free(obj);
   1268 
   1269 	/* use directory name as name */
   1270 	if ((name = strrchr(repodirabs, '/')))
   1271 		name++;
   1272 	else
   1273 		name = "";
   1274 
   1275 	/* strip .git suffix */
   1276 	if (!(strippedname = strdup(name)))
   1277 		err(1, "strdup");
   1278 	if ((p = strrchr(strippedname, '.')))
   1279 		if (!strcmp(p, ".git"))
   1280 			*p = '\0';
   1281 
   1282 	/* read description or .git/description */
   1283 	joinpath(path, sizeof(path), repodir, "description");
   1284 	if (!(fpread = fopen(path, "r"))) {
   1285 		joinpath(path, sizeof(path), repodir, ".git/description");
   1286 		fpread = fopen(path, "r");
   1287 	}
   1288 	if (fpread) {
   1289 		if (!fgets(description, sizeof(description), fpread))
   1290 			description[0] = '\0';
   1291 		checkfileerror(fpread, path, 'r');
   1292 		fclose(fpread);
   1293 	}
   1294 
   1295 	/* read url or .git/url */
   1296 	joinpath(path, sizeof(path), repodir, "url");
   1297 	if (!(fpread = fopen(path, "r"))) {
   1298 		joinpath(path, sizeof(path), repodir, ".git/url");
   1299 		fpread = fopen(path, "r");
   1300 	}
   1301 	if (fpread) {
   1302 		if (!fgets(cloneurl, sizeof(cloneurl), fpread))
   1303 			cloneurl[0] = '\0';
   1304 		checkfileerror(fpread, path, 'r');
   1305 		fclose(fpread);
   1306 		cloneurl[strcspn(cloneurl, "\n")] = '\0';
   1307 	}
   1308 
   1309 	/* check LICENSE */
   1310 	for (i = 0; i < LEN(licensefiles) && !license; i++) {
   1311 		if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
   1312 		    git_object_type(obj) == GIT_OBJ_BLOB)
   1313 			license = licensefiles[i] + strlen("HEAD:");
   1314 		git_object_free(obj);
   1315 	}
   1316 
   1317 	/* check README */
   1318 	for (i = 0; i < LEN(readmefiles) && !readme; i++) {
   1319 		if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
   1320 		    git_object_type(obj) == GIT_OBJ_BLOB)
   1321 			readme = readmefiles[i] + strlen("HEAD:");
   1322 		git_object_free(obj);
   1323 	}
   1324 
   1325 	if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
   1326 	    git_object_type(obj) == GIT_OBJ_BLOB)
   1327 		submodules = ".gitmodules";
   1328 	git_object_free(obj);
   1329 
   1330 	/* log for HEAD */
   1331 	fp = efopen("log.html", "w");
   1332 	relpath = "";
   1333 	mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
   1334 	writeheader(fp, "Log");
   1335 	fputs("<table id=\"log\"><thead>\n<tr><td><b>Date</b></td>"
   1336 	      "<td><b>Commit message</b></td>"
   1337 	      "<td><b>Author</b></td><td class=\"num\" align=\"right\"><b>Files</b></td>"
   1338 	      "<td class=\"num\" align=\"right\"><b>+</b></td>"
   1339 	      "<td class=\"num\" align=\"right\"><b>-</b></td></tr>\n</thead><tbody>\n", fp);
   1340 
   1341 	if (cachefile && head) {
   1342 		/* read from cache file (does not need to exist) */
   1343 		if ((rcachefp = fopen(cachefile, "r"))) {
   1344 			if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
   1345 				errx(1, "%s: no object id", cachefile);
   1346 			if (git_oid_fromstr(&lastoid, lastoidstr))
   1347 				errx(1, "%s: invalid object id", cachefile);
   1348 		}
   1349 
   1350 		/* write log to (temporary) cache */
   1351 		if ((fd = mkstemp(tmppath)) == -1)
   1352 			err(1, "mkstemp");
   1353 		if (!(wcachefp = fdopen(fd, "w")))
   1354 			err(1, "fdopen: '%s'", tmppath);
   1355 		/* write last commit id (HEAD) */
   1356 		git_oid_tostr(buf, sizeof(buf), head);
   1357 		fprintf(wcachefp, "%s\n", buf);
   1358 
   1359 		writelog(fp, head);
   1360 
   1361 		if (rcachefp) {
   1362 			/* append previous log to log.html and the new cache */
   1363 			while (!feof(rcachefp)) {
   1364 				n = fread(buf, 1, sizeof(buf), rcachefp);
   1365 				if (ferror(rcachefp))
   1366 					break;
   1367 				if (fwrite(buf, 1, n, fp) != n ||
   1368 				    fwrite(buf, 1, n, wcachefp) != n)
   1369 					    break;
   1370 			}
   1371 			checkfileerror(rcachefp, cachefile, 'r');
   1372 			fclose(rcachefp);
   1373 		}
   1374 		checkfileerror(wcachefp, tmppath, 'w');
   1375 		fclose(wcachefp);
   1376 	} else {
   1377 		if (head)
   1378 			writelog(fp, head);
   1379 	}
   1380 
   1381 	fputs("</tbody></table>", fp);
   1382 	writefooter(fp);
   1383 	checkfileerror(fp, "log.html", 'w');
   1384 	fclose(fp);
   1385 
   1386 	/* files for HEAD */
   1387 	fp = efopen("files.html", "w");
   1388 	writeheader(fp, "Files");
   1389 	if (head)
   1390 		writefiles(fp, head);
   1391 	writefooter(fp);
   1392 	checkfileerror(fp, "files.html", 'w');
   1393 	fclose(fp);
   1394 
   1395 	/* summary page with branches and tags */
   1396 	fp = efopen("refs.html", "w");
   1397 	writeheader(fp, "Refs");
   1398 	writerefs(fp);
   1399 	writefooter(fp);
   1400 	checkfileerror(fp, "refs.html", 'w');
   1401 	fclose(fp);
   1402 
   1403 	/* Atom feed */
   1404 	fp = efopen("atom.xml", "w");
   1405 	writeatom(fp, 1);
   1406 	checkfileerror(fp, "atom.xml", 'w');
   1407 	fclose(fp);
   1408 
   1409 	/* Atom feed for tags / releases */
   1410 	fp = efopen("tags.xml", "w");
   1411 	writeatom(fp, 0);
   1412 	checkfileerror(fp, "tags.xml", 'w');
   1413 	fclose(fp);
   1414 
   1415 	/* rename new cache file on success */
   1416 	if (cachefile && head) {
   1417 		if (rename(tmppath, cachefile))
   1418 			err(1, "rename: '%s' to '%s'", tmppath, cachefile);
   1419 		umask((mask = umask(0)));
   1420 		if (chmod(cachefile,
   1421 		    (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
   1422 			err(1, "chmod: '%s'", cachefile);
   1423 	}
   1424 
   1425 	/* cleanup */
   1426 	git_repository_free(repo);
   1427 	git_libgit2_shutdown();
   1428 
   1429 	return 0;
   1430 }