io, database: preserve [am]time for cached and fetched files

preserve [am]time for all packages and indexes. this fixes the caching
error that 'apk update' is after new index is generated, but before
the used mirror is synchronized. this caused local apkindex timestamp
to be newer than file in mirror, when in fact it was outdated index.

this also fixes fetched files to have build timestamp so that files
going to .iso or custom images have proper timestamps (rsync with
appropriate --modify-window now works)

1 files changed, 6 insertions, 2 deletions

diff --git a/src/fetch.c b/src/fetch.c
index 43e4dbf..3bb7934 100644
--- a/src/fetch.c
+++ b/src/fetch.c
@@ -175,9 +175,13 @@ static int fetch_package(apk_hash_item item, void *pctx)
 	}
 
 	r = apk_istream_splice(is, fd, pkg->size, progress_cb, ctx);
-	is->close(is);
-	if (fd != STDOUT_FILENO)
+	if (fd != STDOUT_FILENO) {
+		struct apk_file_meta meta;
+		is->get_meta(is, &meta);
+		apk_file_meta_to_fd(fd, &meta);
 		close(fd);
+	}
+	is->close(is);
 
 	if (r != pkg->size) {
 		unlinkat(ctx->outdir_fd, filename, 0);