app-admin/xstow: port to EAPI 7, fix Prefix

Signed-off-by: Sam James <sam@gentoo.org>

app-admin/xstow/xstow-1.0.1.ebuild

@@ -1,11 +1,11 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=5
+EAPI=7
 
-inherit autotools eutils
+inherit autotools
 
-DESCRIPTION="replacement for GNU stow with extensions"
+DESCRIPTION="Replacement for GNU stow with extensions"
 HOMEPAGE="http://xstow.sourceforge.net/"
 SRC_URI="mirror://sourceforge/xstow/${P}.tar.bz2"
 
@@ -17,8 +17,12 @@ IUSE="ncurses"
 DEPEND="ncurses? ( sys-libs/ncurses:0= )"
 RDEPEND="${DEPEND}"
 
+PATCHES=(
+	"${FILESDIR}"/${P}-ncurses.patch
+)
+
 src_prepare() {
-	epatch "${FILESDIR}"/${P}-ncurses.patch
+	default
 	eautoreconf
 }
 
@@ -27,11 +31,11 @@ src_configure() {
 }
 
 src_install() {
-	emake DESTDIR="${D}" docdir="/usr/share/doc/${PF}/html" install
+	emake DESTDIR="${D}" docdir="${EPREFIX}/usr/share/doc/${PF}/html" install
 	dodoc AUTHORS ChangeLog NEWS README TODO
 
 	# create new STOWDIR
-	dodir /var/lib/xstow
+	keepdir /var/lib/xstow
 
 	# install env.d file to add STOWDIR to PATH and LDPATH
 	doenvd "${FILESDIR}/99xstow"