stagit-gemini.c - stagit-gemini - Stagit for gemini protocol Openbsd
(HTM) git clone git://thinkerwim.org/stagit-gemini.git
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---
stagit-gemini.c (35611B)
---
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 <locale.h>
9 #include <stdint.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <time.h>
14 #include <unistd.h>
15 #include <wchar.h>
16
17 #include <git2.h>
18
19 #include "compat.h"
20
21 #define LEN(s) (sizeof(s)/sizeof(*s))
22 #define PAD_TRUNCATE_SYMBOL "\xe2\x80\xa6" /* symbol: "ellipsis" */
23 #define UTF_INVALID_SYMBOL "\xef\xbf\xbd" /* symbol: "replacement" */
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 /* reference and associated data for sorting */
58 struct referenceinfo {
59 struct git_reference *ref;
60 struct commitinfo *ci;
61 };
62
63 static git_repository *repo;
64
65 static const char *baseurl = ""; /* base URL to make absolute RSS/Atom URI */
66 static const char *relpath = "";
67 static const char *repodir;
68
69 static char *name = "";
70 static char *strippedname = "";
71 static char description[255];
72 static char cloneurl[1024];
73 static char *submodules;
74 static char *licensefiles[] = { "HEAD:LICENSE", "HEAD:LICENSE.md", "HEAD:COPYING" };
75 static char *license;
76 static char *readmefiles[] = { "HEAD:README", "HEAD:README.md" };
77 static char *readme;
78 static long long nlogcommits = -1; /* -1 indicates not used */
79
80 /* cache */
81 static git_oid lastoid;
82 static char lastoidstr[GIT_OID_HEXSZ + 2]; /* id + newline + NUL byte */
83 static FILE *rcachefp, *wcachefp;
84 static const char *cachefile;
85
86 /* Handle read or write errors for a FILE * stream */
87 void
88 checkfileerror(FILE *fp, const char *name, int mode)
89 {
90 if (mode == 'r' && ferror(fp))
91 errx(1, "read error: %s", name);
92 else if (mode == 'w' && (fflush(fp) || ferror(fp)))
93 errx(1, "write error: %s", name);
94 }
95
96 /* Format `len' columns of characters. If string is shorter pad the rest
97 * with characters `pad`. */
98 int
99 utf8pad(char *buf, size_t bufsiz, const char *s, size_t len, int pad)
100 {
101 wchar_t wc;
102 size_t col = 0, i, slen, siz = 0;
103 int inc, rl, w;
104
105 if (!bufsiz)
106 return -1;
107 if (!len) {
108 buf[0] = '\0';
109 return 0;
110 }
111
112 slen = strlen(s);
113 for (i = 0; i < slen; i += inc) {
114 inc = 1; /* next byte */
115 if ((unsigned char)s[i] < 32)
116 continue;
117
118 rl = mbtowc(&wc, &s[i], slen - i < 4 ? slen - i : 4);
119 inc = rl;
120 if (rl < 0) {
121 mbtowc(NULL, NULL, 0); /* reset state */
122 inc = 1; /* invalid, seek next byte */
123 w = 1; /* replacement char is one width */
124 } else if ((w = wcwidth(wc)) == -1) {
125 continue;
126 }
127
128 if (col + w > len || (col + w == len && s[i + inc])) {
129 if (siz + 4 >= bufsiz)
130 return -1;
131 memcpy(&buf[siz], PAD_TRUNCATE_SYMBOL, sizeof(PAD_TRUNCATE_SYMBOL) - 1);
132 siz += sizeof(PAD_TRUNCATE_SYMBOL) - 1;
133 buf[siz] = '\0';
134 col++;
135 break;
136 } else if (rl < 0) {
137 if (siz + 4 >= bufsiz)
138 return -1;
139 memcpy(&buf[siz], UTF_INVALID_SYMBOL, sizeof(UTF_INVALID_SYMBOL) - 1);
140 siz += sizeof(UTF_INVALID_SYMBOL) - 1;
141 buf[siz] = '\0';
142 col++;
143 continue;
144 }
145 if (siz + inc + 1 >= bufsiz)
146 return -1;
147 memcpy(&buf[siz], &s[i], inc);
148 siz += inc;
149 buf[siz] = '\0';
150 col += w;
151 }
152
153 len -= col;
154 if (siz + len + 1 >= bufsiz)
155 return -1;
156 memset(&buf[siz], pad, len);
157 siz += len;
158 buf[siz] = '\0';
159
160 return 0;
161 }
162
163 void
164 joinpath(char *buf, size_t bufsiz, const char *path, const char *path2)
165 {
166 int r;
167
168 r = snprintf(buf, bufsiz, "%s%s%s",
169 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
170 if (r < 0 || (size_t)r >= bufsiz)
171 errx(1, "path truncated: '%s%s%s'",
172 path, path[0] && path[strlen(path) - 1] != '/' ? "/" : "", path2);
173 }
174
175 void
176 deltainfo_free(struct deltainfo *di)
177 {
178 if (!di)
179 return;
180 git_patch_free(di->patch);
181 memset(di, 0, sizeof(*di));
182 free(di);
183 }
184
185 int
186 commitinfo_getstats(struct commitinfo *ci)
187 {
188 struct deltainfo *di;
189 git_diff_options opts;
190 git_diff_find_options fopts;
191 const git_diff_delta *delta;
192 const git_diff_hunk *hunk;
193 const git_diff_line *line;
194 git_patch *patch = NULL;
195 size_t ndeltas, nhunks, nhunklines;
196 size_t i, j, k;
197
198 if (git_tree_lookup(&(ci->commit_tree), repo, git_commit_tree_id(ci->commit)))
199 goto err;
200 if (!git_commit_parent(&(ci->parent), ci->commit, 0)) {
201 if (git_tree_lookup(&(ci->parent_tree), repo, git_commit_tree_id(ci->parent))) {
202 ci->parent = NULL;
203 ci->parent_tree = NULL;
204 }
205 }
206
207 git_diff_init_options(&opts, GIT_DIFF_OPTIONS_VERSION);
208 opts.flags |= GIT_DIFF_DISABLE_PATHSPEC_MATCH |
209 GIT_DIFF_IGNORE_SUBMODULES |
210 GIT_DIFF_INCLUDE_TYPECHANGE;
211 if (git_diff_tree_to_tree(&(ci->diff), repo, ci->parent_tree, ci->commit_tree, &opts))
212 goto err;
213
214 if (git_diff_find_init_options(&fopts, GIT_DIFF_FIND_OPTIONS_VERSION))
215 goto err;
216 /* find renames and copies, exact matches (no heuristic) for renames. */
217 fopts.flags |= GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES |
218 GIT_DIFF_FIND_EXACT_MATCH_ONLY;
219 if (git_diff_find_similar(ci->diff, &fopts))
220 goto err;
221
222 ndeltas = git_diff_num_deltas(ci->diff);
223 if (ndeltas && !(ci->deltas = calloc(ndeltas, sizeof(struct deltainfo *))))
224 err(1, "calloc");
225
226 for (i = 0; i < ndeltas; i++) {
227 if (git_patch_from_diff(&patch, ci->diff, i))
228 goto err;
229
230 if (!(di = calloc(1, sizeof(struct deltainfo))))
231 err(1, "calloc");
232 di->patch = patch;
233 ci->deltas[i] = di;
234
235 delta = git_patch_get_delta(patch);
236
237 /* skip stats for binary data */
238 if (delta->flags & GIT_DIFF_FLAG_BINARY)
239 continue;
240
241 nhunks = git_patch_num_hunks(patch);
242 for (j = 0; j < nhunks; j++) {
243 if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
244 break;
245 for (k = 0; ; k++) {
246 if (git_patch_get_line_in_hunk(&line, patch, j, k))
247 break;
248 if (line->old_lineno == -1) {
249 di->addcount++;
250 ci->addcount++;
251 } else if (line->new_lineno == -1) {
252 di->delcount++;
253 ci->delcount++;
254 }
255 }
256 }
257 }
258 ci->ndeltas = i;
259 ci->filecount = i;
260
261 return 0;
262
263 err:
264 git_diff_free(ci->diff);
265 ci->diff = NULL;
266 git_tree_free(ci->commit_tree);
267 ci->commit_tree = NULL;
268 git_tree_free(ci->parent_tree);
269 ci->parent_tree = NULL;
270 git_commit_free(ci->parent);
271 ci->parent = NULL;
272 if (ci->deltas)
273 for (i = 0; i < ci->ndeltas; i++)
274 deltainfo_free(ci->deltas[i]);
275 free(ci->deltas);
276 ci->deltas = NULL;
277 ci->ndeltas = 0;
278 ci->addcount = 0;
279 ci->delcount = 0;
280 ci->filecount = 0;
281
282 return -1;
283 }
284
285 void
286 commitinfo_free(struct commitinfo *ci)
287 {
288 size_t i;
289
290 if (!ci)
291 return;
292 if (ci->deltas)
293 for (i = 0; i < ci->ndeltas; i++)
294 deltainfo_free(ci->deltas[i]);
295 free(ci->deltas);
296 git_diff_free(ci->diff);
297 git_tree_free(ci->commit_tree);
298 git_tree_free(ci->parent_tree);
299 git_commit_free(ci->commit);
300 git_commit_free(ci->parent);
301 memset(ci, 0, sizeof(*ci));
302 free(ci);
303 }
304
305 struct commitinfo *
306 commitinfo_getbyoid(const git_oid *id)
307 {
308 struct commitinfo *ci;
309
310 if (!(ci = calloc(1, sizeof(struct commitinfo))))
311 err(1, "calloc");
312
313 if (git_commit_lookup(&(ci->commit), repo, id))
314 goto err;
315 ci->id = id;
316
317 git_oid_tostr(ci->oid, sizeof(ci->oid), git_commit_id(ci->commit));
318 git_oid_tostr(ci->parentoid, sizeof(ci->parentoid), git_commit_parent_id(ci->commit, 0));
319
320 ci->author = git_commit_author(ci->commit);
321 ci->committer = git_commit_committer(ci->commit);
322 ci->summary = git_commit_summary(ci->commit);
323 ci->msg = git_commit_message(ci->commit);
324
325 return ci;
326
327 err:
328 commitinfo_free(ci);
329
330 return NULL;
331 }
332
333 int
334 refs_cmp(const void *v1, const void *v2)
335 {
336 const struct referenceinfo *r1 = v1, *r2 = v2;
337 time_t t1, t2;
338 int r;
339
340 if ((r = git_reference_is_tag(r1->ref) - git_reference_is_tag(r2->ref)))
341 return r;
342
343 t1 = r1->ci->author ? r1->ci->author->when.time : 0;
344 t2 = r2->ci->author ? r2->ci->author->when.time : 0;
345 if ((r = t1 > t2 ? -1 : (t1 == t2 ? 0 : 1)))
346 return r;
347
348 return strcmp(git_reference_shorthand(r1->ref),
349 git_reference_shorthand(r2->ref));
350 }
351
352 int
353 getrefs(struct referenceinfo **pris, size_t *prefcount)
354 {
355 struct referenceinfo *ris = NULL;
356 struct commitinfo *ci = NULL;
357 git_reference_iterator *it = NULL;
358 const git_oid *id = NULL;
359 git_object *obj = NULL;
360 git_reference *dref = NULL, *r, *ref = NULL;
361 size_t i, refcount;
362
363 *pris = NULL;
364 *prefcount = 0;
365
366 if (git_reference_iterator_new(&it, repo))
367 return -1;
368
369 for (refcount = 0; !git_reference_next(&ref, it); ) {
370 if (!git_reference_is_branch(ref) && !git_reference_is_tag(ref)) {
371 git_reference_free(ref);
372 ref = NULL;
373 continue;
374 }
375
376 switch (git_reference_type(ref)) {
377 case GIT_REF_SYMBOLIC:
378 if (git_reference_resolve(&dref, ref))
379 goto err;
380 r = dref;
381 break;
382 case GIT_REF_OID:
383 r = ref;
384 break;
385 default:
386 continue;
387 }
388 if (!git_reference_target(r) ||
389 git_reference_peel(&obj, r, GIT_OBJ_ANY))
390 goto err;
391 if (!(id = git_object_id(obj)))
392 goto err;
393 if (!(ci = commitinfo_getbyoid(id)))
394 break;
395
396 if (!(ris = reallocarray(ris, refcount + 1, sizeof(*ris))))
397 err(1, "realloc");
398 ris[refcount].ci = ci;
399 ris[refcount].ref = r;
400 refcount++;
401
402 git_object_free(obj);
403 obj = NULL;
404 git_reference_free(dref);
405 dref = NULL;
406 }
407 git_reference_iterator_free(it);
408
409 /* sort by type, date then shorthand name */
410 qsort(ris, refcount, sizeof(*ris), refs_cmp);
411
412 *pris = ris;
413 *prefcount = refcount;
414
415 return 0;
416
417 err:
418 git_object_free(obj);
419 git_reference_free(dref);
420 commitinfo_free(ci);
421 for (i = 0; i < refcount; i++) {
422 commitinfo_free(ris[i].ci);
423 git_reference_free(ris[i].ref);
424 }
425 free(ris);
426
427 return -1;
428 }
429
430 FILE *
431 efopen(const char *filename, const char *flags)
432 {
433 FILE *fp;
434
435 if (!(fp = fopen(filename, flags)))
436 err(1, "fopen: '%s'", filename);
437
438 return fp;
439 }
440
441 /* Escape characters below as HTML 2.0 / XML 1.0. */
442 void
443 xmlencode(FILE *fp, const char *s, size_t len)
444 {
445 size_t i;
446
447 for (i = 0; *s && i < len; s++, i++) {
448 switch(*s) {
449 case '<': fputs("<", fp); break;
450 case '>': fputs(">", fp); break;
451 case '\'': fputs("'", fp); break;
452 case '&': fputs("&", fp); break;
453 case '"': fputs(""", fp); break;
454 default: putc(*s, fp);
455 }
456 }
457 }
458
459 /* Escape characters in text in geomyidae .gmi format, with newlines */
460 void
461 gmitextnl(FILE *fp, const char *s, size_t len)
462 {
463 size_t i, n = 0;
464
465 for (i = 0; s[i] && i < len; i++) {
466 switch (s[i]) {
467 case '\r': break;
468 default: fputc(s[i], fp);
469 }
470 n = (s[i] != '\n');
471 }
472 }
473
474 /* Escape characters in text in geomyidae .gmi format,
475 newlines are ignored */
476 void
477 gmitext(FILE *fp, const char *s, size_t len)
478 {
479 size_t i;
480
481 for (i = 0; *s && i < len; s++, i++) {
482 switch (*s) {
483 case '\r': /* ignore CR */
484 case '\n': /* ignore LF */
485 break;
486 default:
487 putc(*s, fp);
488 break;
489 }
490 }
491 }
492
493 /* Escape characters in links in geomyidae .gmi format */
494 void
495 gmilink(FILE *fp, const char *s, size_t len)
496 {
497 size_t i;
498
499 for (i = 0; *s && i < len; s++, i++) {
500 switch (*s) {
501 case '\r': /* ignore CR */
502 case '\n': /* ignore LF */
503 break;
504 default:
505 putc(*s, fp);
506 break;
507 }
508 }
509 }
510
511 int
512 mkdirp(const char *path)
513 {
514 char tmp[PATH_MAX], *p;
515
516 if (strlcpy(tmp, path, sizeof(tmp)) >= sizeof(tmp))
517 errx(1, "path truncated: '%s'", path);
518 for (p = tmp + (tmp[0] == '/'); *p; p++) {
519 if (*p != '/')
520 continue;
521 *p = '\0';
522 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
523 return -1;
524 *p = '/';
525 }
526 if (mkdir(tmp, S_IRWXU | S_IRWXG | S_IRWXO) < 0 && errno != EEXIST)
527 return -1;
528 return 0;
529 }
530
531 void
532 printtimez(FILE *fp, const git_time *intime)
533 {
534 struct tm *intm;
535 time_t t;
536 char out[32];
537
538 t = (time_t)intime->time;
539 if (!(intm = gmtime(&t)))
540 return;
541 strftime(out, sizeof(out), "%Y-%m-%dT%H:%M:%SZ", intm);
542 fputs(out, fp);
543 }
544
545 void
546 printtime(FILE *fp, const git_time *intime)
547 {
548 struct tm *intm;
549 time_t t;
550 char out[32];
551
552 t = (time_t)intime->time + (intime->offset * 60);
553 if (!(intm = gmtime(&t)))
554 return;
555 strftime(out, sizeof(out), "%a, %e %b %Y %H:%M:%S", intm);
556 if (intime->offset < 0)
557 fprintf(fp, "%s -%02d%02d", out,
558 -(intime->offset) / 60, -(intime->offset) % 60);
559 else
560 fprintf(fp, "%s +%02d%02d", out,
561 intime->offset / 60, intime->offset % 60);
562 }
563
564 void
565 printtimeshort(FILE *fp, const git_time *intime)
566 {
567 struct tm *intm;
568 time_t t;
569 char out[32];
570
571 t = (time_t)intime->time;
572 if (!(intm = gmtime(&t)))
573 return;
574 strftime(out, sizeof(out), "%Y-%m-%d %H:%M", intm);
575 fputs(out, fp);
576 }
577
578 void
579 writeheader(FILE *fp, const char *title)
580 {
581 gmitext(fp, title, strlen(title));
582 if (title[0] && strippedname[0])
583 fputs(" - ", fp);
584 gmitext(fp, strippedname, strlen(strippedname));
585 if (description[0])
586 fputs(" - ", fp);
587 gmitext(fp, description, strlen(description));
588 fputs("\n", fp);
589 if (cloneurl[0]) {
590 fputs("=> ", fp);
591 gmilink(fp, cloneurl, strlen(cloneurl));
592 fputs(" git clone: ", fp);
593 gmilink(fp, cloneurl, strlen(cloneurl));
594 fputc('\n', fp);
595 }
596 fprintf(fp, "=> %s/log.gmi Log\n", relpath);
597 fprintf(fp, "=> %s/files.gmi Files\n", relpath);
598 fprintf(fp, "=> %s/refs.gmi Refs\n", relpath);
599 if (submodules)
600 fprintf(fp, "=> %s/file/%s.gmi Submodules\n",
601 relpath, submodules);
602 if (readme)
603 fprintf(fp, "=> %s/file/%s.gmi README\n",
604 relpath, readme);
605 if (license)
606 fprintf(fp, "=> %s/file/%s.gmi LICENSE\n",
607 relpath, license);
608 fputs("---\n", fp);
609 }
610
611 void
612 writefooter(FILE *fp)
613 {
614 fputs("\n\ngenerated w/ stagit-gemini\n\n", fp);
615 }
616
617 size_t
618 writeblobgmi(FILE *fp, const git_blob *blob)
619 {
620 size_t n = 0, i, j, len, prev;
621 const char *nfmt = "%6zu ";
622 const char *s = git_blob_rawcontent(blob);
623
624 len = git_blob_rawsize(blob);
625 if (len > 0) {
626 for (i = 0, prev = 0; i < len; i++) {
627 if (s[i] != '\n')
628 continue;
629 n++;
630 fprintf(fp, nfmt, n, n, n);
631 for (j = prev; j <= i && s[j]; j++) {
632 switch (s[j]) {
633 case '\r': break;
634 default: putc(s[j], fp);
635 }
636 }
637 prev = i + 1;
638 }
639 /* trailing data */
640 if ((len - prev) > 0) {
641 n++;
642 fprintf(fp, nfmt, n, n, n);
643 for (j = prev; j < len - prev && s[j]; j++) {
644 switch (s[j]) {
645 case '\r': break;
646 case '\t': fputs(" ", fp); break;
647 default: putc(s[j], fp);
648 }
649 }
650 }
651 }
652
653 return n;
654 }
655
656 void
657 printcommit(FILE *fp, struct commitinfo *ci)
658 {
659 fprintf(fp, "=> %s/commit/%s.gmi commit %s\n",
660 relpath, ci->oid, ci->oid);
661
662 if (ci->parentoid[0])
663 fprintf(fp, "=> %s/commit/%s.gmi parent %s\n",
664 relpath, ci->parentoid, ci->parentoid);
665
666 if (ci->author) {
667 fputs(" Author: ", fp);
668 gmilink(fp, ci->author->name, strlen(ci->author->name));
669 fputs(" <", fp);
670 gmilink(fp, ci->author->email, strlen(ci->author->email));
671 fputs(">\n", fp);
672 fputs("Date: ", fp);
673 printtime(fp, &(ci->author->when));
674 putc('\n', fp);
675 }
676 if (ci->msg) {
677 putc('\n', fp);
678 gmitextnl(fp, ci->msg, strlen(ci->msg));
679 putc('\n', fp);
680 }
681 }
682
683 void
684 printshowfile(FILE *fp, struct commitinfo *ci)
685 {
686 const git_diff_delta *delta;
687 const git_diff_hunk *hunk;
688 const git_diff_line *line;
689 git_patch *patch;
690 size_t nhunks, nhunklines, changed, add, del, total, i, j, k;
691 char buf[256], filename[256], linestr[32];
692 int c;
693
694 printcommit(fp, ci);
695
696 if (!ci->deltas)
697 return;
698
699 if (ci->filecount > 1000 ||
700 ci->ndeltas > 1000 ||
701 ci->addcount > 100000 ||
702 ci->delcount > 100000) {
703 fputs("\nDiff is too large, output suppressed.\n", fp);
704 return;
705 }
706
707 /* diff stat */
708 fputs("Diffstat:\n", fp);
709 for (i = 0; i < ci->ndeltas; i++) {
710 delta = git_patch_get_delta(ci->deltas[i]->patch);
711
712 switch (delta->status) {
713 case GIT_DELTA_ADDED: c = 'A'; break;
714 case GIT_DELTA_COPIED: c = 'C'; break;
715 case GIT_DELTA_DELETED: c = 'D'; break;
716 case GIT_DELTA_MODIFIED: c = 'M'; break;
717 case GIT_DELTA_RENAMED: c = 'R'; break;
718 case GIT_DELTA_TYPECHANGE: c = 'T'; break;
719 default: c = ' '; break;
720 }
721
722 if (strcmp(delta->old_file.path, delta->new_file.path)) {
723 snprintf(filename, sizeof(filename), "%s -> %s",
724 delta->old_file.path, delta->new_file.path);
725 utf8pad(buf, sizeof(buf), filename, 35, ' ');
726 } else {
727 utf8pad(buf, sizeof(buf), delta->old_file.path, 35, ' ');
728 }
729 fprintf(fp, " %c ", c);
730 gmitext(fp, buf, strlen(buf));
731
732 add = ci->deltas[i]->addcount;
733 del = ci->deltas[i]->delcount;
734 changed = add + del;
735 total = sizeof(linestr) - 2;
736 if (changed > total) {
737 if (add)
738 add = ((float)total / changed * add) + 1;
739 if (del)
740 del = ((float)total / changed * del) + 1;
741 }
742 memset(&linestr, '+', add);
743 memset(&linestr[add], '-', del);
744
745 fprintf(fp, " | %7zu ",
746 ci->deltas[i]->addcount + ci->deltas[i]->delcount);
747 fwrite(&linestr, 1, add, fp);
748 fwrite(&linestr[add], 1, del, fp);
749 fputs("\n", fp);
750 }
751 fprintf(fp, "\n%zu file%s changed, %zu insertion%s(+), %zu deletion%s(-)\n",
752 ci->filecount, ci->filecount == 1 ? "" : "s",
753 ci->addcount, ci->addcount == 1 ? "" : "s",
754 ci->delcount, ci->delcount == 1 ? "" : "s");
755
756 fputs("---\n", fp);
757
758 for (i = 0; i < ci->ndeltas; i++) {
759 patch = ci->deltas[i]->patch;
760 delta = git_patch_get_delta(patch);
761 /* NOTE: only links to new path */
762 fprintf(fp, "=> %s/file/", relpath);
763 gmilink(fp, delta->new_file.path, strlen(delta->new_file.path));
764 fputs(".gmi diff --git a/", fp);
765 gmilink(fp, delta->old_file.path, strlen(delta->old_file.path));
766 fputs(" b/", fp);
767 gmilink(fp, delta->new_file.path, strlen(delta->new_file.path));
768 fputc('\n', fp);
769
770 /* check binary data */
771 if (delta->flags & GIT_DIFF_FLAG_BINARY) {
772 fputs("Binary files differ.\n", fp);
773 continue;
774 }
775
776 nhunks = git_patch_num_hunks(patch);
777 for (j = 0; j < nhunks; j++) {
778 if (git_patch_get_hunk(&hunk, &nhunklines, patch, j))
779 break;
780
781 if (hunk->header_len > 0 && hunk->header[0] == '[')
782 fputc('t', fp);
783 gmitext(fp, hunk->header, hunk->header_len);
784 putc('\n', fp);
785
786 for (k = 0; ; k++) {
787 if (git_patch_get_line_in_hunk(&line, patch, j, k))
788 break;
789 if (line->old_lineno == -1)
790 fputs("+", fp);
791 else if (line->new_lineno == -1)
792 fputs("-", fp);
793 else
794 fputs(" ", fp);
795 gmitext(fp, line->content, line->content_len);
796 putc('\n', fp);
797 }
798 }
799 }
800 }
801
802 void
803 writelogline(FILE *fp, struct commitinfo *ci)
804 {
805 char buf[256];
806
807 fprintf(fp, "=> %s/commit/%s.gmi ", relpath, ci->oid);
808 if (ci->author)
809 printtimeshort(fp, &(ci->author->when));
810 else
811 fputs(" ", fp);
812 fputs(" ", fp);
813 utf8pad(buf, sizeof(buf), ci->summary ? ci->summary : "", 40, ' ');
814 gmilink(fp, buf, strlen(buf));
815 fputs(" ", fp);
816 utf8pad(buf, sizeof(buf), ci->author ? ci->author->name : "", 19, '\0');
817 gmilink(fp, buf, strlen(buf));
818 fputc('\n', fp);
819 }
820
821 int
822 writelog(FILE *fp, const git_oid *oid)
823 {
824 struct commitinfo *ci;
825 git_revwalk *w = NULL;
826 git_oid id;
827 char path[PATH_MAX], oidstr[GIT_OID_HEXSZ + 1];
828 FILE *fpfile;
829 size_t remcommits = 0;
830 int r;
831
832 git_revwalk_new(&w, repo);
833 git_revwalk_push(w, oid);
834
835 while (!git_revwalk_next(&id, w)) {
836 if (cachefile && !memcmp(&id, &lastoid, sizeof(id)))
837 break;
838
839 git_oid_tostr(oidstr, sizeof(oidstr), &id);
840 r = snprintf(path, sizeof(path), "commit/%s.gmi", oidstr);
841 if (r < 0 || (size_t)r >= sizeof(path))
842 errx(1, "path truncated: 'commit/%s.gmi'", oidstr);
843 r = access(path, F_OK);
844
845 /* optimization: if there are no log lines to write and
846 the commit file already exists: skip the diffstat */
847 if (!nlogcommits) {
848 remcommits++;
849 if (!r)
850 continue;
851 }
852
853 if (!(ci = commitinfo_getbyoid(&id)))
854 break;
855
856 if (nlogcommits != 0) {
857 writelogline(fp, ci);
858 if (nlogcommits > 0)
859 nlogcommits--;
860 }
861
862 if (cachefile)
863 writelogline(wcachefp, ci);
864
865 /* check if file exists if so skip it */
866 if (r) {
867 /* lookup stats: only required here for gemini */
868 if (commitinfo_getstats(ci) == -1)
869 goto err;
870
871 fpfile = efopen(path, "w");
872 writeheader(fpfile, ci->summary);
873 printshowfile(fpfile, ci);
874 writefooter(fpfile);
875 checkfileerror(fpfile, path, 'w');
876 fclose(fpfile);
877 }
878 err:
879 commitinfo_free(ci);
880 }
881 git_revwalk_free(w);
882
883 if (nlogcommits == 0 && remcommits != 0) {
884 fprintf(fp, "%16.16s "
885 "%zu more commits remaining, fetch the repository\n",
886 "", remcommits);
887 }
888
889 return 0;
890 }
891
892 void
893 printcommitatom(FILE *fp, struct commitinfo *ci, const char *tag)
894 {
895 fputs("<entry>\n", fp);
896
897 fprintf(fp, "<id>%s</id>\n", ci->oid);
898 if (ci->author) {
899 fputs("<published>", fp);
900 printtimez(fp, &(ci->author->when));
901 fputs("</published>\n", fp);
902 }
903 if (ci->committer) {
904 fputs("<updated>", fp);
905 printtimez(fp, &(ci->committer->when));
906 fputs("</updated>\n", fp);
907 }
908 if (ci->summary) {
909 fputs("<title type=\"text\">", fp);
910 if (tag && tag[0]) {
911 fputs("[", fp);
912 xmlencode(fp, tag, strlen(tag));
913 fputs("] ", fp);
914 }
915 xmlencode(fp, ci->summary, strlen(ci->summary));
916 fputs("</title>\n", fp);
917 }
918 fprintf(fp, "<link rel=\"alternate\" href=\"%scommit/%s.gmi\" />\n",
919 baseurl, ci->oid);
920
921 if (ci->author) {
922 fputs("<author>\n<name>", fp);
923 xmlencode(fp, ci->author->name, strlen(ci->author->name));
924 fputs("</name>\n<email>", fp);
925 xmlencode(fp, ci->author->email, strlen(ci->author->email));
926 fputs("</email>\n</author>\n", fp);
927 }
928
929 fputs("<content type=\"text\">", fp);
930 fprintf(fp, "commit %s\n", ci->oid);
931 if (ci->parentoid[0])
932 fprintf(fp, "parent %s\n", ci->parentoid);
933 if (ci->author) {
934 fputs("Author: ", fp);
935 xmlencode(fp, ci->author->name, strlen(ci->author->name));
936 fputs(" <", fp);
937 xmlencode(fp, ci->author->email, strlen(ci->author->email));
938 fputs(">\nDate: ", fp);
939 printtime(fp, &(ci->author->when));
940 putc('\n', fp);
941 }
942 if (ci->msg) {
943 putc('\n', fp);
944 xmlencode(fp, ci->msg, strlen(ci->msg));
945 }
946 fputs("\n</content>\n</entry>\n", fp);
947 }
948
949 int
950 writeatom(FILE *fp, int all)
951 {
952 struct referenceinfo *ris = NULL;
953 size_t refcount = 0;
954 struct commitinfo *ci;
955 git_revwalk *w = NULL;
956 git_oid id;
957 size_t i, m = 100; /* last 'm' commits */
958
959 fputs("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
960 "<feed xmlns=\"http://www.w3.org/2005/Atom\">\n<title>", fp);
961 xmlencode(fp, strippedname, strlen(strippedname));
962 fputs(", branch HEAD</title>\n<subtitle>", fp);
963 xmlencode(fp, description, strlen(description));
964 fputs("</subtitle>\n", fp);
965
966 /* all commits or only tags? */
967 if (all) {
968 git_revwalk_new(&w, repo);
969 git_revwalk_push_head(w);
970 for (i = 0; i < m && !git_revwalk_next(&id, w); i++) {
971 if (!(ci = commitinfo_getbyoid(&id)))
972 break;
973 printcommitatom(fp, ci, "");
974 commitinfo_free(ci);
975 }
976 git_revwalk_free(w);
977 } else if (getrefs(&ris, &refcount) != -1) {
978 /* references: tags */
979 for (i = 0; i < refcount; i++) {
980 if (git_reference_is_tag(ris[i].ref))
981 printcommitatom(fp, ris[i].ci,
982 git_reference_shorthand(ris[i].ref));
983
984 commitinfo_free(ris[i].ci);
985 git_reference_free(ris[i].ref);
986 }
987 free(ris);
988 }
989
990 fputs("</feed>\n", fp);
991
992 return 0;
993 }
994
995 size_t
996 writeblob(git_object *obj, const char *fpath, const char *filename, size_t filesize)
997 {
998 char tmp[PATH_MAX] = "", *d;
999 size_t lc = 0;
1000 FILE *fp;
1001
1002 if (strlcpy(tmp, fpath, sizeof(tmp)) >= sizeof(tmp))
1003 errx(1, "path truncated: '%s'", fpath);
1004 if (!(d = dirname(tmp)))
1005 err(1, "dirname");
1006 if (mkdirp(d))
1007 return -1;
1008
1009 fp = efopen(fpath, "w");
1010 writeheader(fp, filename);
1011 if (filename[0] == '[')
1012 fputs("[|", fp);
1013 gmitext(fp, filename, strlen(filename));
1014 fprintf(fp, " (%zuB)\n", filesize);
1015 fputs("---\n", fp);
1016
1017 if (git_blob_is_binary((git_blob *)obj))
1018 fputs("Binary file.\n", fp);
1019 else
1020 lc = writeblobgmi(fp, (git_blob *)obj);
1021
1022 writefooter(fp);
1023 checkfileerror(fp, fpath, 'w');
1024 fclose(fp);
1025
1026 return lc;
1027 }
1028
1029 const char *
1030 filemode(git_filemode_t m)
1031 {
1032 static char mode[11];
1033
1034 memset(mode, '-', sizeof(mode) - 1);
1035 mode[10] = '\0';
1036
1037 if (S_ISREG(m))
1038 mode[0] = '-';
1039 else if (S_ISBLK(m))
1040 mode[0] = 'b';
1041 else if (S_ISCHR(m))
1042 mode[0] = 'c';
1043 else if (S_ISDIR(m))
1044 mode[0] = 'd';
1045 else if (S_ISFIFO(m))
1046 mode[0] = 'p';
1047 else if (S_ISLNK(m))
1048 mode[0] = 'l';
1049 else if (S_ISSOCK(m))
1050 mode[0] = 's';
1051 else
1052 mode[0] = '?';
1053
1054 if (m & S_IRUSR) mode[1] = 'r';
1055 if (m & S_IWUSR) mode[2] = 'w';
1056 if (m & S_IXUSR) mode[3] = 'x';
1057 if (m & S_IRGRP) mode[4] = 'r';
1058 if (m & S_IWGRP) mode[5] = 'w';
1059 if (m & S_IXGRP) mode[6] = 'x';
1060 if (m & S_IROTH) mode[7] = 'r';
1061 if (m & S_IWOTH) mode[8] = 'w';
1062 if (m & S_IXOTH) mode[9] = 'x';
1063
1064 if (m & S_ISUID) mode[3] = (mode[3] == 'x') ? 's' : 'S';
1065 if (m & S_ISGID) mode[6] = (mode[6] == 'x') ? 's' : 'S';
1066 if (m & S_ISVTX) mode[9] = (mode[9] == 'x') ? 't' : 'T';
1067
1068 return mode;
1069 }
1070
1071 int
1072 writefilestree(FILE *fp, git_tree *tree, const char *path)
1073 {
1074 const git_tree_entry *entry = NULL;
1075 git_object *obj = NULL;
1076 const char *entryname;
1077 char buf[256], filepath[PATH_MAX], entrypath[PATH_MAX], oid[8];
1078 size_t count, i, lc, filesize;
1079 int r, ret;
1080
1081 count = git_tree_entrycount(tree);
1082 for (i = 0; i < count; i++) {
1083 if (!(entry = git_tree_entry_byindex(tree, i)) ||
1084 !(entryname = git_tree_entry_name(entry)))
1085 return -1;
1086 joinpath(entrypath, sizeof(entrypath), path, entryname);
1087
1088 r = snprintf(filepath, sizeof(filepath), "file/%s.gmi",
1089 entrypath);
1090 if (r < 0 || (size_t)r >= sizeof(filepath))
1091 errx(1, "path truncated: 'file/%s.gmi'", entrypath);
1092
1093 if (!git_tree_entry_to_object(&obj, repo, entry)) {
1094 switch (git_object_type(obj)) {
1095 case GIT_OBJ_BLOB:
1096 break;
1097 case GIT_OBJ_TREE:
1098 /* NOTE: recurses */
1099 ret = writefilestree(fp, (git_tree *)obj,
1100 entrypath);
1101 git_object_free(obj);
1102 if (ret)
1103 return ret;
1104 continue;
1105 default:
1106 git_object_free(obj);
1107 continue;
1108 }
1109
1110 filesize = git_blob_rawsize((git_blob *)obj);
1111 lc = writeblob(obj, filepath, entryname, filesize);
1112
1113 fprintf(fp, "=> %s/", relpath);
1114 gmilink(fp, filepath, strlen(filepath));
1115 fputc(' ', fp);
1116 fputs(filemode(git_tree_entry_filemode(entry)), fp);
1117 fputs(" ", fp);
1118 utf8pad(buf, sizeof(buf), entrypath, 50, ' ');
1119 gmilink(fp, buf, strlen(buf));
1120 fputs(" ", fp);
1121 if (lc > 0)
1122 fprintf(fp, "%7zuL", lc);
1123 else
1124 fprintf(fp, "%7zuB", filesize);
1125 fputc('\n', fp);
1126 git_object_free(obj);
1127 } else if (git_tree_entry_type(entry) == GIT_OBJ_COMMIT) {
1128 /* commit object in tree is a submodule */
1129 git_oid_tostr(oid, sizeof(oid), git_tree_entry_id(entry));
1130 gmilink(fp, oid, strlen(oid));
1131 fprintf(fp, "=> %s/file/.gitmodules.gmi ", relpath);
1132 fputs("m--------- ", fp);
1133
1134 fputc('\n', fp);
1135
1136
1137 /* NOTE: linecount omitted */
1138 }
1139 }
1140
1141 return 0;
1142 }
1143
1144 int
1145 writefiles(FILE *fp, const git_oid *id)
1146 {
1147 git_tree *tree = NULL;
1148 git_commit *commit = NULL;
1149 int ret = -1;
1150
1151 fprintf(fp, "%-10.10s ", "Mode");
1152 fprintf(fp, "%-50.50s ", "Name");
1153 fprintf(fp, "%8.8s\n", "Size");
1154
1155 if (!git_commit_lookup(&commit, repo, id) &&
1156 !git_commit_tree(&tree, commit))
1157 ret = writefilestree(fp, tree, "");
1158
1159 git_commit_free(commit);
1160 git_tree_free(tree);
1161
1162 return ret;
1163 }
1164
1165 int
1166 writerefs(FILE *fp)
1167 {
1168 struct referenceinfo *ris = NULL;
1169 struct commitinfo *ci;
1170 size_t count, i, j, refcount;
1171 const char *titles[] = { "Branches", "Tags" };
1172 const char *s;
1173 char buf[256];
1174
1175 if (getrefs(&ris, &refcount) == -1)
1176 return -1;
1177
1178 for (i = 0, j = 0, count = 0; i < refcount; i++) {
1179 if (j == 0 && git_reference_is_tag(ris[i].ref)) {
1180 /* table footer */
1181 if (count)
1182 fputs("\n", fp);
1183 count = 0;
1184 j = 1;
1185 }
1186
1187 /* print header if it has an entry (first). */
1188 if (++count == 1) {
1189 fprintf(fp, "%s\n", titles[j]);
1190 if (j)
1191 {
1192 fprintf(fp, " %-30.30s", "Download");
1193 fprintf(fp, " %-32.32s", "Name");
1194 }
1195 else
1196 {
1197 fprintf(fp, " %-32.32s", "Name");
1198 fprintf(fp, " %-32.32s", "Commit message");
1199 }
1200 fprintf(fp, " %-16.16s", "Last commit date");
1201 fprintf(fp, " %s\n", "Author");
1202 }
1203
1204 ci = ris[i].ci;
1205 s = git_reference_shorthand(ris[i].ref);
1206
1207 if (!j){
1208 fputs(" ", fp);
1209 utf8pad(buf, sizeof(buf), s, 32, ' ');
1210 gmilink(fp, buf, strlen(buf));
1211 fputs(" ", fp);
1212 }
1213 if(j)
1214 {
1215
1216 char *shortrepo = NULL;
1217 char *shorttag = NULL;
1218 char link[128];
1219 shortrepo = strdup(name);
1220 shorttag = strdup(s);
1221
1222 if (strstr(shortrepo, ".git"))
1223 {
1224 size_t len = strlen(shortrepo);
1225 shortrepo[len-4] = 0;
1226 }
1227 if (shorttag[0] == 'v') shorttag = shorttag+1;
1228 sprintf(link,"=>/snapshot/%s-%s.tar.gz ",shortrepo,shorttag);
1229 utf8pad(buf, sizeof(buf), link, 32, ' ');
1230 gmilink(fp, buf, strlen(buf));
1231 fputs(" ", fp);
1232 utf8pad(buf, sizeof(buf), s, 32, ' ');
1233 gmilink(fp, buf, strlen(buf));
1234 }
1235 fputs(" ", fp);
1236 utf8pad(buf, sizeof(buf), ci->summary, 32, ' ');
1237 gmilink(fp, buf, strlen(buf));
1238
1239 if (ci->author)
1240 printtimeshort(fp, &(ci->author->when));
1241 else
1242 fputs(" ", fp);
1243 fputs(" ", fp);
1244 if (ci->author) {
1245 utf8pad(buf, sizeof(buf), ci->author->name, 25, '\0');
1246 gmilink(fp, buf, strlen(buf));
1247 }
1248 fputs("\n", fp);
1249 }
1250 /* table footer */
1251 if (count)
1252 fputs("\n", fp);
1253
1254 for (i = 0; i < refcount; i++) {
1255 commitinfo_free(ris[i].ci);
1256 git_reference_free(ris[i].ref);
1257 }
1258 free(ris);
1259
1260 return 0;
1261 }
1262
1263 void
1264 usage(char *argv0)
1265 {
1266 fprintf(stderr, "usage: %s [-b baseprefix] [-c cachefile | -l commits] "
1267 "[-u baseurl] repodir\n", argv0);
1268 exit(1);
1269 }
1270
1271 int
1272 main(int argc, char *argv[])
1273 {
1274 git_object *obj = NULL;
1275 const git_oid *head = NULL;
1276 mode_t mask;
1277 FILE *fp, *fpread;
1278 char path[PATH_MAX], repodirabs[PATH_MAX + 1], *p;
1279 char tmppath[64] = "cache.XXXXXXXXXXXX", buf[BUFSIZ];
1280 size_t n;
1281 int i, fd;
1282
1283 setlocale(LC_CTYPE, "");
1284
1285 for (i = 1; i < argc; i++) {
1286 if (argv[i][0] != '-') {
1287 if (repodir)
1288 usage(argv[0]);
1289 repodir = argv[i];
1290 } else if (argv[i][1] == 'b') {
1291 if (i + 1 >= argc)
1292 usage(argv[0]);
1293 relpath = argv[++i];
1294 } else if (argv[i][1] == 'c') {
1295 if (nlogcommits > 0 || i + 1 >= argc)
1296 usage(argv[0]);
1297 cachefile = argv[++i];
1298 } else if (argv[i][1] == 'l') {
1299 if (cachefile || i + 1 >= argc)
1300 usage(argv[0]);
1301 errno = 0;
1302 nlogcommits = strtoll(argv[++i], &p, 10);
1303 if (argv[i][0] == '\0' || *p != '\0' ||
1304 nlogcommits <= 0 || errno)
1305 usage(argv[0]);
1306 } else if (argv[i][1] == 'u') {
1307 if (i + 1 >= argc)
1308 usage(argv[0]);
1309 baseurl = argv[++i];
1310 }
1311 }
1312 if (!repodir)
1313 usage(argv[0]);
1314
1315 if (!realpath(repodir, repodirabs))
1316 err(1, "realpath");
1317
1318 /* do not search outside the git repository:
1319 GIT_CONFIG_LEVEL_APP is the highest level currently */
1320 git_libgit2_init();
1321 for (i = 1; i <= GIT_CONFIG_LEVEL_APP; i++)
1322 git_libgit2_opts(GIT_OPT_SET_SEARCH_PATH, i, "");
1323 /* do not require the git repository to be owned by the current user */
1324 git_libgit2_opts(GIT_OPT_SET_OWNER_VALIDATION, 0);
1325
1326 #ifdef __OpenBSD__
1327 if (unveil(repodir, "r") == -1)
1328 err(1, "unveil: %s", repodir);
1329 if (unveil(".", "rwc") == -1)
1330 err(1, "unveil: .");
1331 if (cachefile && unveil(cachefile, "rwc") == -1)
1332 err(1, "unveil: %s", cachefile);
1333
1334 if (cachefile) {
1335 if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
1336 err(1, "pledge");
1337 } else {
1338 if (pledge("stdio rpath wpath cpath", NULL) == -1)
1339 err(1, "pledge");
1340 }
1341 #endif
1342
1343 if (git_repository_open_ext(&repo, repodir,
1344 GIT_REPOSITORY_OPEN_NO_SEARCH, NULL) < 0) {
1345 fprintf(stderr, "%s: cannot open repository\n", argv[0]);
1346 return 1;
1347 }
1348
1349 /* find HEAD */
1350 if (!git_revparse_single(&obj, repo, "HEAD"))
1351 head = git_object_id(obj);
1352 git_object_free(obj);
1353
1354 /* use directory name as name */
1355 if ((name = strrchr(repodirabs, '/')))
1356 name++;
1357 else
1358 name = "";
1359
1360 /* strip .git suffix */
1361 if (!(strippedname = strdup(name)))
1362 err(1, "strdup");
1363 if ((p = strrchr(strippedname, '.')))
1364 if (!strcmp(p, ".git"))
1365 *p = '\0';
1366
1367 /* read description or .git/description */
1368 joinpath(path, sizeof(path), repodir, "description");
1369 if (!(fpread = fopen(path, "r"))) {
1370 joinpath(path, sizeof(path), repodir, ".git/description");
1371 fpread = fopen(path, "r");
1372 }
1373 if (fpread) {
1374 if (!fgets(description, sizeof(description), fpread))
1375 description[0] = '\0';
1376 checkfileerror(fpread, path, 'r');
1377 fclose(fpread);
1378 }
1379
1380 /* read url or .git/url */
1381 joinpath(path, sizeof(path), repodir, "url");
1382 if (!(fpread = fopen(path, "r"))) {
1383 joinpath(path, sizeof(path), repodir, ".git/url");
1384 fpread = fopen(path, "r");
1385 }
1386 if (fpread) {
1387 if (!fgets(cloneurl, sizeof(cloneurl), fpread))
1388 cloneurl[0] = '\0';
1389 checkfileerror(fpread, path, 'r');
1390 fclose(fpread);
1391 cloneurl[strcspn(cloneurl, "\n")] = '\0';
1392 }
1393
1394 /* check LICENSE */
1395 for (i = 0; i < LEN(licensefiles) && !license; i++) {
1396 if (!git_revparse_single(&obj, repo, licensefiles[i]) &&
1397 git_object_type(obj) == GIT_OBJ_BLOB)
1398 license = licensefiles[i] + strlen("HEAD:");
1399 git_object_free(obj);
1400 }
1401
1402 /* check README */
1403 for (i = 0; i < LEN(readmefiles) && !readme; i++) {
1404 if (!git_revparse_single(&obj, repo, readmefiles[i]) &&
1405 git_object_type(obj) == GIT_OBJ_BLOB)
1406 readme = readmefiles[i] + strlen("HEAD:");
1407 git_object_free(obj);
1408 }
1409
1410 if (!git_revparse_single(&obj, repo, "HEAD:.gitmodules") &&
1411 git_object_type(obj) == GIT_OBJ_BLOB)
1412 submodules = ".gitmodules";
1413 git_object_free(obj);
1414
1415 /* log for HEAD */
1416 fp = efopen("log.gmi", "w");
1417 mkdir("commit", S_IRWXU | S_IRWXG | S_IRWXO);
1418 writeheader(fp, "Log");
1419
1420 fprintf(fp, "%-16.16s ", "Date");
1421 fprintf(fp, "%-40.40s ", "Commit message");
1422 fprintf(fp, "%s\n", "Author");
1423
1424 if (cachefile && head) {
1425 /* read from cache file (does not need to exist) */
1426 if ((rcachefp = fopen(cachefile, "r"))) {
1427 if (!fgets(lastoidstr, sizeof(lastoidstr), rcachefp))
1428 errx(1, "%s: no object id", cachefile);
1429 if (git_oid_fromstr(&lastoid, lastoidstr))
1430 errx(1, "%s: invalid object id", cachefile);
1431 }
1432
1433 /* write log to (temporary) cache */
1434 if ((fd = mkstemp(tmppath)) == -1)
1435 err(1, "mkstemp");
1436 if (!(wcachefp = fdopen(fd, "w")))
1437 err(1, "fdopen: '%s'", tmppath);
1438 /* write last commit id (HEAD) */
1439 git_oid_tostr(buf, sizeof(buf), head);
1440 fprintf(wcachefp, "%s\n", buf);
1441
1442 writelog(fp, head);
1443
1444 if (rcachefp) {
1445 /* append previous log to log.gmi and the new cache */
1446 while (!feof(rcachefp)) {
1447 n = fread(buf, 1, sizeof(buf), rcachefp);
1448 if (ferror(rcachefp))
1449 break;
1450 if (fwrite(buf, 1, n, fp) != n ||
1451 fwrite(buf, 1, n, wcachefp) != n)
1452 break;
1453 }
1454 checkfileerror(rcachefp, cachefile, 'r');
1455 fclose(rcachefp);
1456 }
1457 checkfileerror(wcachefp, tmppath, 'w');
1458 fclose(wcachefp);
1459 } else {
1460 if (head)
1461 writelog(fp, head);
1462 }
1463 fprintf(fp, "\n=> %s/atom.xml Atom Feed\n", relpath);
1464 writefooter(fp);
1465 checkfileerror(fp, "log.gmi", 'w');
1466 fclose(fp);
1467
1468 /* files for HEAD */
1469 fp = efopen("files.gmi", "w");
1470 writeheader(fp, "Files");
1471 if (head)
1472 writefiles(fp, head);
1473 writefooter(fp);
1474 checkfileerror(fp, "files.gmi", 'w');
1475 fclose(fp);
1476
1477 /* summary page with branches and tags */
1478 fp = efopen("refs.gmi", "w");
1479 writeheader(fp, "Refs");
1480 writerefs(fp);
1481 writefooter(fp);
1482 checkfileerror(fp, "refs.gmi", 'w');
1483 fclose(fp);
1484
1485 /* Atom feed */
1486 fp = efopen("atom.xml", "w");
1487 writeatom(fp, 1);
1488 checkfileerror(fp, "atom.xml", 'w');
1489 fclose(fp);
1490
1491 /* Atom feed for tags / releases */
1492 fp = efopen("tags.xml", "w");
1493 writeatom(fp, 0);
1494 checkfileerror(fp, "tags.xml", 'w');
1495 fclose(fp);
1496
1497 /* rename new cache file on success */
1498 if (cachefile && head) {
1499 if (rename(tmppath, cachefile))
1500 err(1, "rename: '%s' to '%s'", tmppath, cachefile);
1501 umask((mask = umask(0)));
1502 if (chmod(cachefile,
1503 (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH) & ~mask))
1504 err(1, "chmod: '%s'", cachefile);
1505 }
1506
1507 /* cleanup */
1508 git_repository_free(repo);
1509 git_libgit2_shutdown();
1510
1511 return 0;
1512 }