eclass/systemd: Sync with gentoo

It's from gentoo commit b8f91fee6a8314dc58c1da011b65d9b857ef963f.

sdk_container/src/third_party/portage-stable/eclass/systemd.eclass

@@ -1,10 +1,10 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 2011-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: systemd.eclass
 # @MAINTAINER:
 # systemd@gentoo.org
-# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6 7
+# @SUPPORTED_EAPIS: 5 6 7 8
 # @BLURB: helper functions to install systemd units
 # @DESCRIPTION:
 # This eclass provides a set of functions to install unit files for
@@ -24,14 +24,14 @@
 # }
 # @CODE
 
-inherit toolchain-funcs
+case ${EAPI} in
-
+	5|6|7|8) ;;
-case ${EAPI:-0} in
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
-	0|1|2|3|4|5|6|7) ;;
-	*) die "${ECLASS}.eclass API in EAPI ${EAPI} not yet established."
 esac
 
-if [[ ${EAPI:-0} == [0123456] ]]; then
+inherit toolchain-funcs
+
+if [[ ${EAPI} == [56] ]]; then
 	DEPEND="virtual/pkgconfig"
 else
 	BDEPEND="virtual/pkgconfig"
@@ -48,6 +48,9 @@ _systemd_get_dir() {
 	[[ ${#} -eq 2 ]] || die "Usage: ${FUNCNAME} <variable-name> <fallback-directory>"
 	local variable=${1} fallback=${2} d
 
+	# https://github.com/pkgconf/pkgconf/issues/205
+	local -x PKG_CONFIG_FDO_SYSROOT_RULES=1
+
 	if $(tc-getPKG_CONFIG) --exists systemd; then
 		d=$($(tc-getPKG_CONFIG) --variable="${variable}" systemd) || die
 		d=${d#${EPREFIX}}
@@ -58,7 +61,7 @@ _systemd_get_dir() {
 	echo "${d}"
 }
 
-# @FUNCTION: _systemd_get_unitdir
+# @FUNCTION: _systemd_get_systemunitdir
 # @INTERNAL
 # @DESCRIPTION:
 # Get unprefixed unitdir.
@@ -72,7 +75,6 @@ _systemd_get_systemunitdir() {
 # ${D}).  This function always succeeds, even if systemd is not
 # installed.
 systemd_get_systemunitdir() {
-	has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
 	debug-print-function ${FUNCNAME} "${@}"
 
 	echo "${EPREFIX}$(_systemd_get_systemunitdir)"
@@ -82,7 +84,7 @@ systemd_get_systemunitdir() {
 # @DESCRIPTION:
 # Deprecated alias for systemd_get_systemunitdir.
 systemd_get_unitdir() {
-	[[ ${EAPI} == [012345] ]] || die "${FUNCNAME} is banned in EAPI 6, use systemd_get_systemunitdir instead"
+	[[ ${EAPI} == 5 ]] || die "${FUNCNAME} is banned in EAPI 6, use systemd_get_systemunitdir instead"
 
 	systemd_get_systemunitdir
 }
@@ -101,7 +103,6 @@ _systemd_get_userunitdir() {
 # ${D}). This function always succeeds, even if systemd is not
 # installed.
 systemd_get_userunitdir() {
-	has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
 	debug-print-function ${FUNCNAME} "${@}"
 
 	echo "${EPREFIX}$(_systemd_get_userunitdir)"
@@ -121,7 +122,6 @@ _systemd_get_utildir() {
 # ${D}). This function always succeeds, even if systemd is not
 # installed.
 systemd_get_utildir() {
-	has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
 	debug-print-function ${FUNCNAME} "${@}"
 
 	echo "${EPREFIX}$(_systemd_get_utildir)"
@@ -138,20 +138,35 @@ _systemd_get_systemgeneratordir() {
 # @FUNCTION: systemd_get_systemgeneratordir
 # @DESCRIPTION:
 # Output the path for the systemd system generator directory (not including
-# ${D}). This function always succeeds, even if systemd is not
+# ${D}). This function always succeeds, even if systemd is not installed.
-# installed.
 systemd_get_systemgeneratordir() {
-	has "${EAPI:-0}" 0 1 2 && ! use prefix && EPREFIX=
 	debug-print-function ${FUNCNAME} "${@}"
 
 	echo "${EPREFIX}$(_systemd_get_systemgeneratordir)"
 }
 
+# @FUNCTION: _systemd_get_systempresetdir
+# @INTERNAL
+# @DESCRIPTION:
+# Get unprefixed systempresetdir.
+_systemd_get_systempresetdir() {
+	_systemd_get_dir systemdsystempresetdir /lib/systemd/system-preset
+}
+
+# @FUNCTION: systemd_get_systempresetdir
+# @DESCRIPTION:
+# Output the path for the systemd system preset directory (not including
+# ${D}). This function always succeeds, even if systemd is not installed.
+systemd_get_systempresetdir() {
+	debug-print-function ${FUNCNAME} "${@}"
+
+	echo "${EPREFIX}$(_systemd_get_systempresetdir)"
+}
+
 # @FUNCTION: systemd_dounit
 # @USAGE: <unit>...
 # @DESCRIPTION:
-# Install systemd unit(s). Uses doins, thus it is fatal in EAPI 4
+# Install systemd unit(s). Uses doins, thus it is fatal.
-# and non-fatal in earlier EAPIs.
 systemd_dounit() {
 	debug-print-function ${FUNCNAME} "${@}"
 
@@ -165,8 +180,7 @@ systemd_dounit() {
 # @FUNCTION: systemd_newunit
 # @USAGE: <old-name> <new-name>
 # @DESCRIPTION:
-# Install systemd unit with a new name. Uses newins, thus it is fatal
+# Install systemd unit with a new name. Uses newins, thus it is fatal.
-# in EAPI 4 and non-fatal in earlier EAPIs.
 systemd_newunit() {
 	debug-print-function ${FUNCNAME} "${@}"
 
@@ -180,8 +194,7 @@ systemd_newunit() {
 # @FUNCTION: systemd_douserunit
 # @USAGE: <unit>...
 # @DESCRIPTION:
-# Install systemd user unit(s). Uses doins, thus it is fatal in EAPI 4
+# Install systemd user unit(s). Uses doins, thus it is fatal.
-# and non-fatal in earlier EAPIs.
 systemd_douserunit() {
 	debug-print-function ${FUNCNAME} "${@}"
 
@@ -196,7 +209,7 @@ systemd_douserunit() {
 # @USAGE: <old-name> <new-name>
 # @DESCRIPTION:
 # Install systemd user unit with a new name. Uses newins, thus it
-# is fatal in EAPI 4 and non-fatal in earlier EAPIs.
+# is fatal.
 systemd_newuserunit() {
 	debug-print-function ${FUNCNAME} "${@}"
 
@@ -237,54 +250,11 @@ systemd_install_serviced() {
 	)
 }
 
-# @FUNCTION: systemd_dotmpfilesd
-# @USAGE: <tmpfilesd>...
-# @DESCRIPTION:
-# Deprecated in favor of tmpfiles.eclass.
-#
-# Install systemd tmpfiles.d files. Uses doins, thus it is fatal
-# in EAPI 4 and non-fatal in earlier EAPIs.
-systemd_dotmpfilesd() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	for f; do
-		[[ ${f} == *.conf ]] \
-			|| die 'tmpfiles.d files need to have .conf suffix.'
-	done
-
-	(
-		insopts -m 0644
-		insinto /usr/lib/tmpfiles.d/
-		doins "${@}"
-	)
-}
-
-# @FUNCTION: systemd_newtmpfilesd
-# @USAGE: <old-name> <new-name>.conf
-# @DESCRIPTION:
-# Deprecated in favor of tmpfiles.eclass.
-#
-# Install systemd tmpfiles.d file under a new name. Uses newins, thus it
-# is fatal in EAPI 4 and non-fatal in earlier EAPIs.
-systemd_newtmpfilesd() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${2} == *.conf ]] \
-		|| die 'tmpfiles.d files need to have .conf suffix.'
-
-	(
-		insopts -m 0644
-		insinto /usr/lib/tmpfiles.d/
-		newins "${@}"
-	)
-}
-
 # @FUNCTION: systemd_enable_service
 # @USAGE: <target> <service>
 # @DESCRIPTION:
 # Enable service in desired target, e.g. install a symlink for it.
-# Uses dosym, thus it is fatal in EAPI 4 and non-fatal in earlier
+# Uses dosym, thus it is fatal.
-# EAPIs.
 systemd_enable_service() {
 	debug-print-function ${FUNCNAME} "${@}"
 
@@ -307,8 +277,7 @@ systemd_enable_service() {
 # and name, while the remaining arguments list service units that will
 # be added to that file.
 #
-# Uses doins, thus it is fatal in EAPI 4 and non-fatal in earlier
+# Uses doins, thus it is fatal.
-# EAPIs.
 #
 # Doc: https://www.freedesktop.org/wiki/Software/systemd/timedated/
 systemd_enable_ntpunit() {
@@ -363,7 +332,7 @@ systemd_enable_ntpunit() {
 # argument to this function (`$(systemd_with_unitdir systemdunitdir)'). Please
 # remember to report a bug upstream as well.
 systemd_with_unitdir() {
-	[[ ${EAPI:-0} != [012345] ]] && die "${FUNCNAME} is banned in EAPI ${EAPI}, use --with-${1:-systemdsystemunitdir}=\"\$(systemd_get_systemunitdir)\" instead"
+	[[ ${EAPI} == 5 ]] || die "${FUNCNAME} is banned in EAPI ${EAPI}, use --with-${1:-systemdsystemunitdir}=\"\$(systemd_get_systemunitdir)\" instead"
 
 	debug-print-function ${FUNCNAME} "${@}"
 	local optname=${1:-systemdsystemunitdir}
@@ -380,7 +349,7 @@ systemd_with_unitdir() {
 # systemd helpers. This function always succeeds. Its output may be quoted
 # in order to preserve whitespace in paths.
 systemd_with_utildir() {
-	[[ ${EAPI:-0} != [012345] ]] && die "${FUNCNAME} is banned in EAPI ${EAPI}, use --with-systemdutildir=\"\$(systemd_get_utildir)\" instead"
+	[[ ${EAPI} == 5 ]] || die "${FUNCNAME} is banned in EAPI ${EAPI}, use --with-systemdutildir=\"\$(systemd_get_utildir)\" instead"
 
 	debug-print-function ${FUNCNAME} "${@}"
 
@@ -436,29 +405,6 @@ systemd_is_booted() {
 	return ${ret}
 }
 
-# @FUNCTION: systemd_tmpfiles_create
-# @USAGE: <tmpfilesd> ...
-# @DESCRIPTION:
-# Deprecated in favor of tmpfiles.eclass.
-#
-# Invokes systemd-tmpfiles --create with given arguments.
-# Does nothing if ROOT != / or systemd-tmpfiles is not in PATH.
-# This function should be called from pkg_postinst.
-#
-# Generally, this function should be called with the names of any tmpfiles
-# fragments which have been installed, either by the build system or by a
-# previous call to systemd_dotmpfilesd. This ensures that any tmpfiles are
-# created without the need to reboot the system.
-systemd_tmpfiles_create() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${EBUILD_PHASE} == postinst ]] || die "${FUNCNAME}: Only valid in pkg_postinst"
-	[[ ${#} -gt 0 ]] || die "${FUNCNAME}: Must specify at least one filename"
-	[[ ${ROOT:-/} == / ]] || return 0
-	type systemd-tmpfiles &> /dev/null || return 0
-	systemd-tmpfiles --create "${@}"
-}
-
 # @FUNCTION: systemd_reenable
 # @USAGE: <unit> ...
 # @DESCRIPTION: