Back in Gentoo - first steps :-)

app-misc/over-env/over-env-9999.ebuild

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+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit git-r3
+
+DESCRIPTION="A personal collection of scripts, aliases, zsh envs, and a nice prompt."
+HOMEPAGE="https://git.decade.cz/overwatch/over-env"
+EGIT_REPO_URI="https://git.decade.cz/overwatch/over-env.git"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="*"
+IUSE="+tools +prompt +locale +screen"
+
+RDEPEND="
+	tools? ( dev-python/psutil dev-python/over )
+"
+
+src_compile() {
+	if use prompt; then
+		ewarn "This is a prototype written in Python. Expect lower performance."
+	fi
+}
+
+src_install() {
+	if use tools; then
+		dobin bin/*
+	fi
+	
+	if use prompt; then
+		insinto /usr/share/${PN}
+		doins lib/{prompt-init,prompt.py}
+	fi
+	
+	insinto /usr/share/${PN}
+	doins lib/python-startup.py
+	
+	insinto /etc
+	doins -r etc/{over,zsh}
+	
+	if use screen; then
+		doins etc/{screenrc,screenrc.over}
+	fi
+	
+	if use locale; then
+		insinto /usr/share/i18n/locales
+		doins locale/en_EU
+	fi
+}
+
+pkg_postinst() {
+	if use prompt; then
+		einfo "Source /usr/share/over-env/prompt-init to enable the prompt."
+		einfo "It can be configured in /etc/over/env/prompt.cfg"
+	fi
+}