Revert "remove(cros-tmpfiles.eclass): Replaced by new systemd-tmpfiles"

This reverts commit b4d0088622884704dda44711fb8f8b7b65dc8a0f.

sdk_container/src/third_party/coreos-overlay/eclass/cros-tmpfiles.eclass

@@ -0,0 +1,93 @@
+# Copyright 2014 The CoreOS Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: cros-tmpfiles
+# @AUTHOR: marineam
+# @BLURB: A basic systemd-tmpfiles --create implementation for ebuilds.
+# @DESCRIPTION:
+# Any location that is outside of /usr must be initialized during the build
+# and (re)created during boot if it is missing. To avoid duplicating
+# definitions of these directories/symlinks in ebuilds and tmpfiles configs
+# packages can instead only install a tmpfiles config and use this eclass to
+# create teh paths in an ebuild friendly way.
+#
+# Note: in the future if we add a --root option to systemd-tmpfiles we can
+# switch to calling that instead of using this simplified implementation.
+
+# Enforce use of recent EAPIs for the sake of consistancy/sanity
+case "${EAPI:-0}" in
+	0|1|2|3)
+		die "Unsupported EAPI=${EAPI:-0} (too old) for ${ECLASS}"
+		;;
+	4|5)
+		;;
+	*)
+		die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
+		;;
+esac
+
+# Since bash doesn't have a slick syntax for subsituting default values
+# for anything other than blank vs. non-blank variables this helps.
+# Usage: _tmpfiles_set_defaults mode uid gid age arg
+_tmpfiles_do_file() {
+	[[ ${tmode} == - ]] && tmode=0644
+	if [[ "${ttype}" == F ]]; then
+		rm -rf "${ED}/${tpath}"
+	elif [[ -e "${ED}/${tpath}" ]]; then
+		return 0
+	fi
+	if [[ "${targ}" != - ]]; then
+		echo "${targ}" > "${ED}/${tpath}" || return 1
+	else
+		echo -n > "${ED}/${tpath}" || return 1
+	fi
+	chmod "${tmode}" "${ED}/${tpath}" || return 1
+	chown "${tuid}:${tgid}" "${ED}/${tpath}" || return 1
+}
+
+_tmpfiles_do_dir() {
+	[[ ${tmode} == - ]] && tmode=0755
+	if [[ "${ttype}" == d && -e "${ED}/${tpath}" ]]; then
+		return 0
+	else
+		rm -rf "${ED}/${tpath}"
+	fi
+	mkdir -m "${tmode}" "${ED}/${tpath}" || return 1
+	chown "${tuid}:${tgid}" "${ED}/${tpath}" || return 1
+}
+
+_tmpfiles_do_link() {
+	if [[ -e "${ED}/${tpath}" || -h "${ED}/${tpath}" ]]; then
+		return 0
+	fi
+	ln -s "${targ}" "${ED}/${tpath}" || return 1
+}
+
+_tmpfiles_do_create() {
+	local ttype tpath tmode tuid tgid tage targ trule
+	while read ttype tpath tmode tuid tgid tage targ; do
+		trule="$ttype $tpath $tmode $tuid $tgid $tage $targ"
+		[[ "${tuid}" == - ]] && tuid=root
+		[[ "${tgid}" == - ]] && tgid=root
+		case "${ttype}" in
+			f|F)	_tmpfiles_do_file;;
+			d|D)	_tmpfiles_do_dir;;
+			L)		_tmpfiles_do_link;;
+			*)		ewarn "Skipping tmpfiles rule: ${trule}";;
+		esac
+		if [[ $? -ne 0 ]]; then
+			eerror "Bad tmpfiles rule: ${trule}"
+			return 1
+		fi
+	done
+}
+
+tmpfiles_create() {
+	if [[ $# -eq 0 ]]; then
+		set -- "${ED}"/usr/lib*/tmpfiles.d/*.conf
+	fi
+	local conf
+	for conf in "$@"; do
+		_tmpfiles_do_create < "${conf}" || die "Bad tmpfiles config: ${conf}"
+	done
+}