sys-process/runit: remove dependency on openrc

runit can be used either as a replacement of init (pid 1) or as a process
supervisor. We're discussing the first case here. Currently, Gentoo use openrc
to handle service startup and stop in runit's stage 1 & 3, which might be too
heavy for a lighweight init. Most people who choose runit as init will likely
to write their own scripts. Therefore, the call of openrc is changed to a
template script, and won't be called by default.

Additionally, to provide users with more options, a new USE "scripts" is added.
If disabled, no script(s) will be installed into /etc/runit.

1. remove dependency on openrc, add USE scripts (enabled by default), if
   disabled, will keep /etc/runit clean.
2. replace /bin/sh w/ /bin/bash for stage 1 & 3 scripts.
3. add /etc/runit/rc.sh to call user-defined scripts during stage 1 & 3
4. move the call of openrc in /etc/runit/{1,3} to /etc/runit/rc/{1,3}.openrc.example

Closes: https://bugs.gentoo.org/611846
Reviewed-by: Alex Efros <powerman-asdf@yandex.ru>
Signed-off-by: Z. Liu <zhixu.liu@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/39776
Signed-off-by: Sam James <sam@gentoo.org>

sys-process/runit/files/1-r2

@@ -0,0 +1,11 @@
+#!/bin/bash
+# system one time tasks
+
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+
+. /etc/runit/rc.sh
+
+run_rc_stage 1
+
+touch /etc/runit/stopit
+chmod 0 /etc/runit/stopit

sys-process/runit/files/1.openrc.example

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# example script in stage 1 using openrc, sys-apps/openrc must be installed
+
+RUNLEVEL=S /sbin/openrc sysinit
+RUNLEVEL=S /sbin/openrc boot

sys-process/runit/files/3-r2

@@ -0,0 +1,15 @@
+#!/bin/bash
+exec >/dev/console 2>&1
+PATH=/sbin:/usr/sbin:/bin:/usr/bin
+
+echo 'Waiting for getties to stop...'
+sv -w 10 force-shutdown /etc/service/getty-*
+
+echo 'Waiting for services to stop...'
+sv -w 300 force-shutdown /etc/service/*
+
+echo 'Shutdown...'
+
+. /etc/runit/rc.sh
+
+run_rc_stage 3

sys-process/runit/files/3.openrc.example

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+# example script in stage 3 using openrc, sys-apps/openrc must be installed
+
+test -x /etc/runit/reboot && LAST=6    || LAST=0
+test -x /etc/runit/reboot && RC=reboot || RC=shutdown
+RUNLEVEL=$LAST /sbin/openrc $RC

sys-process/runit/files/rc.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# run script(s) at /etc/runit/rc/, suffix must be .sh, prefix
+# must be [1|3] which denote stage 1 or 3.
+run_rc_stage() {
+	local prefix="${1}"
+	local prev_opt=$(shopt -p nullglob)
+	shopt -s nullglob
+	for file in /etc/runit/rc/"${prefix}".*.sh; do
+		if [[ ! -x "${file}" ]] || [[ ! -s "${file}" ]] ; then
+			continue
+		fi
+		. "${file}"
+	done
+	${prev_opt}
+}

sys-process/runit/metadata.xml

@@ -12,4 +12,7 @@
   <upstream>
     <remote-id type="github">clan/runit</remote-id>
   </upstream>
+  <use>
+    <flag name="scripts">Install boot scripts into /etc/runit/.</flag>
+  </use>
 </pkgmetadata>

sys-process/runit/runit-2.1.2-r6.ebuild

@@ -69,15 +69,15 @@ src_install() {
 
 	exeinto /etc/runit
 	doexe "${FILESDIR}"/ctrlaltdel
-	newexe "${FILESDIR}"/1-${PV} 1
-	newexe "${FILESDIR}"/2-${PV} 2
-	newexe "${FILESDIR}"/3-${PV} 3
+	newexe "${FILESDIR}"/1-r1 1
+	newexe "${FILESDIR}"/2-r1 2
+	newexe "${FILESDIR}"/3-r1 3
 
 	dodir /etc/sv
 	for tty in tty1 tty2 tty3 tty4 tty5 tty6; do
 		exeinto /etc/sv/getty-$tty/
 		newexe "${FILESDIR}"/finish.getty finish
-		newexe "${FILESDIR}"/run.getty-${PV} run
+		newexe "${FILESDIR}"/run.getty run
 		for script in finish run; do
 			sed -i -e "s:TTY:${tty}:g" "${ED}"/etc/sv/getty-$tty/$script
 		done

sys-process/runit/runit-2.1.2-r7.ebuild

@@ -0,0 +1,169 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit toolchain-funcs flag-o-matic
+
+DESCRIPTION="A UNIX init scheme with service supervision"
+HOMEPAGE="https://smarden.org/runit/"
+PATCH_VER=20240905
+SRC_URI="
+	https://smarden.org/runit/${P}.tar.gz
+	https://github.com/clan/runit/releases/download/${PV}-r5/${P}-patches-${PATCH_VER}.tar.xz
+"
+S=${WORKDIR}/admin/${P}/src
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~m68k ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86"
+IUSE="+scripts split-usr static"
+
+src_unpack() {
+	unpack ${P}.tar.gz
+	unpack ${P}-patches-${PATCH_VER}.tar.xz
+}
+
+src_prepare() {
+	default
+
+	cd "${S}"/.. || die
+	eapply -p3 "${WORKDIR}"/patches
+	cd "${S}" || die
+
+	# We either build everything or nothing static
+	sed -i -e 's:-static: :' Makefile || die
+
+	# see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=726008
+	[[ ${COMPILER} == "diet" ]] &&
+		use ppc &&
+		filter-flags "-mpowerpc-gpopt"
+}
+
+src_configure() {
+	use static && append-ldflags -static
+
+	append-flags -std=gnu17  # XXX https://bugs.gentoo.org/946137, workaround for gcc15
+	echo "$(tc-getCC) ${CFLAGS}"  > conf-cc || die
+	echo "$(tc-getCC) ${LDFLAGS}" > conf-ld || die
+	sed -i -e "s:ar cr:$(tc-getAR) cr:" print-ar.sh || die
+	sed -i -e "s:ranlib :$(tc-getRANLIB) :" print-ar.sh || die
+}
+
+src_install() {
+	dobin $(<../package/commands)
+	dodir /sbin
+	mv "${ED}"/usr/bin/{runit-init,runit,utmpset} "${ED}"/sbin/ || die "dosbin"
+	if use split-usr ; then
+		dosym ../etc/runit/2 /sbin/runsvdir-start
+	else
+		dosym ../../etc/runit/2 /sbin/runsvdir-start
+	fi
+
+	DOCS=( ../package/{CHANGES,README,THANKS,TODO} )
+	HTML_DOCS=( ../doc/*.html )
+	einstalldocs
+	doman ../man/*.[18]
+
+	if use scripts ; then
+		exeinto /etc/runit
+		doexe "${FILESDIR}"/ctrlaltdel
+		newexe "${FILESDIR}"/1-r2 1
+		newexe "${FILESDIR}"/2-r1 2
+		newexe "${FILESDIR}"/3-r2 3
+		doexe "${FILESDIR}"/rc.sh
+		insinto /etc/runit/rc
+		doins "${FILESDIR}"/1.openrc.example
+		doins "${FILESDIR}"/3.openrc.example
+	fi
+
+	dodir /etc/sv
+	for tty in tty1 tty2 tty3 tty4 tty5 tty6; do
+		exeinto /etc/sv/getty-$tty/
+		newexe "${FILESDIR}"/finish.getty finish
+		newexe "${FILESDIR}"/run.getty run
+		for script in finish run; do
+			sed -i -e "s:TTY:${tty}:g" "${ED}"/etc/sv/getty-$tty/$script
+		done
+	done
+
+	# make sv command work
+	newenvd - 20runit <<- EOF
+		#/etc/env.d/20runit
+		SVDIR="/etc/service/"
+	EOF
+}
+
+default_config() {
+	local sv="${EROOT}"/etc/sv
+	local service="${EROOT}"/etc/service
+	mkdir -p "${service}" || die
+	for x in tty1 tty2 tty3 tty4 tty5 tty6; do
+		ln -sf "${sv}"/getty-$x "${service}"/getty-$x || die
+	done
+	einfo "The links to services runit will supervise are installed"
+	einfo "in $service."
+	einfo "If you need multiple runlevels, please see the documentation"
+	einfo "for how to set them up."
+	einfo
+}
+
+migrate_from_211() {
+	# Create /etc/service and /var/service if requested
+	if [[ -e "${T}"/make_var_service ]]; then
+		ln -sf "${EROOT}"/etc/runit/runsvdir/current "${EROOT}"/etc/service || die
+		ln -sf "${EROOT}"/etc/runit/runsvdir/current "${EROOT}"/var/service || die
+	fi
+	if [[ -d "${T}"/runsvdir ]]; then
+		cp -a "${T}"/runsvdir "${EROOT}"/etc/runit || die
+	fi
+	return 0
+}
+
+pkg_preinst() {
+	if  has_version '<sys-process/runit-2.1.2'; then
+		pre_212=yes
+	fi
+}
+
+pkg_postinst() {
+	if [[ -z ${REPLACING_VERSIONS} ]]; then
+		default_config
+	elif [[ -n ${pre_212} ]]; then
+		migrate_from_211
+	fi
+
+	if use scripts; then
+		ewarn "To make sure sv works correctly in your currently open"
+		ewarn "shells, please run the following command:"
+		ewarn
+		ewarn "source /etc/profile"
+		ewarn
+		ewarn "Currently, no task(s) will run in stage 1 & 3, you're on your own"
+		ewarn "to put script(s) into /etc/runit/rc/, please see /etc/runit/rc.sh"
+		ewarn "for name in different stages."
+	else
+		ewarn "This build with USE=\"-scripts\" doesn\'t include any boot scripts"
+		ewarn "into /etc/runit, you are on your own to put the scripts."
+		ewarn "Also, /sbin/runsvdir-start is a broken symlink to /etc/runit/2, you will"
+		ewarn "need to create script /etc/runit/2 before use it."
+	fi
+
+	if [[ -L "${EROOT}"/var/service ]]; then
+		ewarn "Once this version of runit is active, please remove the"
+		ewarn "compatibility symbolic link at ${EROOT}/var/service"
+		ewarn "The correct path now is ${EROOT}/etc/service"
+		ewarn
+	fi
+
+	if [[ -L "${EROOT}"/etc/runit/runsvdir/all ]]; then
+		ewarn "${EROOT}/etc/runit/runsvdir/all has moved to"
+		ewarn "${EROOT}/etc/sv."
+		ewarn "Any symbolic links under ${EROOT}/etc/runit/runsvdir"
+		ewarn "which point to services through ../all should be updated to"
+		ewarn "point to them through ${EROOT}/etc/sv."
+		ewarn "Once that is done, ${EROOT}/etc/runit/runsvdir/all should be"
+		ewarn "removed."
+		ewarn
+	fi
+}

sys-process/runit/runit-2.2.0-r1.ebuild

@@ -16,9 +16,7 @@ S=${WORKDIR}/admin/${P}/src
 LICENSE="BSD"
 SLOT="0"
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~m68k ~mips ~ppc ~ppc64 ~s390 ~sparc ~x86"
-IUSE="split-usr static"
-
-RDEPEND="sys-apps/openrc"
+IUSE="+scripts split-usr static"
 
 src_prepare() {
 	default
@@ -45,8 +43,6 @@ src_configure() {
 }
 
 src_install() {
-	local ver_runit_cfg="2.1.2"  # use files from 2.1.2
-
 	dobin $(<../package/commands)
 	dodir /sbin
 	mv "${ED}"/usr/bin/{runit-init,runit,utmpset} "${ED}"/sbin/ || die "dosbin"
@@ -61,17 +57,23 @@ src_install() {
 	einstalldocs
 	doman ../man/*.[18]
 
-	exeinto /etc/runit
-	doexe "${FILESDIR}"/ctrlaltdel
-	newexe "${FILESDIR}"/1-${ver_runit_cfg} 1
-	newexe "${FILESDIR}"/2-${ver_runit_cfg} 2
-	newexe "${FILESDIR}"/3-${ver_runit_cfg} 3
+	if use scripts ; then
+		exeinto /etc/runit
+		doexe "${FILESDIR}"/ctrlaltdel
+		newexe "${FILESDIR}"/1-r2 1
+		newexe "${FILESDIR}"/2-r1 2
+		newexe "${FILESDIR}"/3-r2 3
+		doexe "${FILESDIR}"/rc.sh
+		insinto /etc/runit/rc
+		doins "${FILESDIR}"/1.openrc.example
+		doins "${FILESDIR}"/3.openrc.example
+	fi
 
 	dodir /etc/sv
 	for tty in tty1 tty2 tty3 tty4 tty5 tty6; do
 		exeinto /etc/sv/getty-$tty/
 		newexe "${FILESDIR}"/finish.getty finish
-		newexe "${FILESDIR}"/run.getty-${ver_runit_cfg} run
+		newexe "${FILESDIR}"/run.getty run
 		for script in finish run; do
 			sed -i -e "s:TTY:${tty}:g" "${ED}"/etc/sv/getty-$tty/$script
 		done
@@ -123,11 +125,21 @@ pkg_postinst() {
 		migrate_from_211
 	fi
 
-	ewarn "To make sure sv works correctly in your currently open"
-	ewarn "shells, please run the following command:"
-	ewarn
-	ewarn "source /etc/profile"
-	ewarn
+	if use scripts; then
+		ewarn "To make sure sv works correctly in your currently open"
+		ewarn "shells, please run the following command:"
+		ewarn
+		ewarn "source /etc/profile"
+		ewarn
+		ewarn "Currently, no task(s) will run in stage 1 & 3, you're on your own"
+		ewarn "to put script(s) into /etc/runit/rc/, please see /etc/runit/rc.sh"
+		ewarn "for name in different stages."
+	else
+		ewarn "This build with USE=\"-scripts\" doesn\'t include any boot scripts"
+		ewarn "into /etc/runit, you are on your own to put the scripts."
+		ewarn "Also, /sbin/runsvdir-start is a broken symlink to /etc/runit/2, you will"
+		ewarn "need to create script /etc/runit/2 before use it."
+	fi
 
 	if [[ -L "${EROOT}"/var/service ]]; then
 		ewarn "Once this version of runit is active, please remove the"