games-board/tablebase-syzygy: Update to EAPI 8

We can use selective fetch restriction in EAPI 8, therefore the
"nofetch" slot is no longer necessary.

Signed-off-by: Ulrich Müller <ulm@gentoo.org>

games-board/tablebase-syzygy/tablebase-syzygy-0_pre20131213-r101.ebuild

@@ -0,0 +1,79 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit check-reqs
+
+DESCRIPTION="Syzygy chess endgame tablebases for up to 6 pieces"
+HOMEPAGE="http://tablebase.sesse.net/
+	https://kirill-kryukov.com/chess/tablebases-online/"
+
+tb345=()
+tb6=()
+m=(P N B R Q K)
+for ((i=4; i>=0; i--)); do
+	tb345+=(K${m[i]}vK) # 2+1
+	for ((j=i; j>=0; j--)); do
+		tb345+=(K${m[i]}vK${m[j]} K${m[i]}${m[j]}vK) # 2+2, 3+1
+		for ((k=4; k>=0; k--)); do
+			tb345+=(K${m[i]}${m[j]}vK${m[k]}) # 3+2
+			((k<=i)) || continue
+			for ((l=k; l>=0; l--)); do
+				((k<i || l<=j)) && tb6+=(K${m[i]}${m[j]}vK${m[k]}${m[l]}) # 3+3
+			done
+			((k<=j)) || continue
+			tb345+=(K${m[i]}${m[j]}${m[k]}vK) # 4+1
+			for ((l=4; l>=0; l--)); do
+				tb6+=(K${m[i]}${m[j]}${m[k]}vK${m[l]}) # 4+2
+				((l<=k)) && tb6+=(K${m[i]}${m[j]}${m[k]}${m[l]}vK) # 5+1
+			done
+		done
+	done
+done
+
+tb345=("${tb345[@]/#/mirror+http://tablebase.sesse.net/syzygy/3-4-5/}")
+SRC_URI="${tb345[@]/%/.rtbw} ${tb345[@]/%/.rtbz}
+	6-pieces? ( ${tb6[@]/%/.rtbw} ${tb6[@]/%/.rtbz} )"
+unset i j k l m tb345 tb6
+
+LICENSE="public-domain" # machine-generated tables
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="6-pieces"
+RESTRICT="fetch"
+
+RDEPEND="!${CATEGORY}/${PN}:nofetch"
+
+S="${WORKDIR}"
+
+pkg_nofetch() {
+	einfo "Due to their large size, fetching the Syzygy Endgame Tablebases via"
+	einfo "BitTorrent is recommended: https://oics.olympuschess.com/tracker/"
+	einfo "After downloading, place all K*.rtbw and K*.rtbz files in your"
+	einfo "DISTDIR directory."
+	einfo "(For the tablebases with up to 6 pieces, there should be"
+	einfo "$(echo ${A} | wc -w) files in total.)"
+}
+
+pkg_pretend() {
+	CHECKREQS_DISK_USR="$(usex 6-pieces 151G 939M)"
+	CHECKREQS_DISK_BUILD="${CHECKREQS_DISK_USR}"
+	check-reqs_pkg_pretend
+}
+
+pkg_setup() {
+	CHECKREQS_DISK_USR="$(usex 6-pieces 151G 939M)"
+	CHECKREQS_DISK_BUILD="${CHECKREQS_DISK_USR}"
+	check-reqs_pkg_setup
+}
+
+src_unpack() { :; }
+
+src_install() {
+	local f
+	insinto /usr/share/${PN}
+	for f in ${A}; do
+		[[ ${f} == *.rtb[wz] ]] && echo "${DISTDIR}"/${f}
+	done | xargs doins
+}