feat(systemd-ac-power): introducing the systemd-ac-power module

Introducing the systemd-ac-power module

dracut.spec

@@ -322,6 +322,7 @@ echo 'dracut_rescue_image="yes"' > $RPM_BUILD_ROOT%{dracutlibdir}/dracut.conf.d/
 %if 0%{?fedora} || 0%{?rhel} || 0%{?suse_version}
 %{dracutlibdir}/modules.d/01fips
 %endif
+%{dracutlibdir}/modules.d/01systemd-ac-power
 %{dracutlibdir}/modules.d/01systemd-ask-password
 %{dracutlibdir}/modules.d/01systemd-coredump
 %{dracutlibdir}/modules.d/01systemd-initrd

modules.d/01systemd-ac-power/99-initrd-power-targets.rules

@@ -0,0 +1,3 @@
+# This file is part of dracut systemd ac power module
+SUBSYSTEM=="power_supply", KERNEL=="AC", ATTR{online}=="0", RUN+="/usr/sbin/systemctl start initrd-on-battery-power.target"
+SUBSYSTEM=="power_supply", KERNEL=="AC", ATTR{online}=="1", RUN+="/usr/sbin/systemctl start initrd-on-ac-power.target"

modules.d/01systemd-ac-power/initrd-on-ac-power.target

@@ -0,0 +1,8 @@
+# This file is part of dracut.
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+[Unit]
+Description=Initial RAM Disk On AC Power
+ConditionPathExists=/usr/lib/initrd-release
+DefaultDependencies=no
+StopWhenUnneeded=yes

modules.d/01systemd-ac-power/initrd-on-battery-power.target

@@ -0,0 +1,8 @@
+# This file is part of dracut.
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+[Unit]
+Description=Initial RAM Disk On Battery Power
+ConditionPathExists=/usr/lib/initrd-release
+DefaultDependencies=no
+StopWhenUnneeded=yes

modules.d/01systemd-ac-power/module-setup.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+# This file is part of dracut.
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+# Prerequisite check(s) for module.
+check() {
+
+    # Return 255 to only include the module, if another module requires it.
+    return 255
+
+}
+
+# Module dependency requirements.
+depends() {
+
+    # Return 0 to include the dependent module(s) in the initramfs.
+    return 0
+
+}
+
+# Install the required file(s) and directories for the module in the initramfs.
+install() {
+
+    inst_rules "$moddir/99-initrd-power-targets.rules"
+    inst_simple "$systemdutildir"/systemd-ac-power
+    inst_simple "$moddir/initrd-on-ac-power.target" "$systemdsystemunitdir/initrd-on-ac-power.target"
+    inst_simple "$moddir/initrd-on-battery-power.target" "$systemdsystemunitdir/initrd-on-battery-power.target"
+
+}