meson: add feature flag for battery-check

battery-check builds and installs binaries, docs, units, etc. Add a
feature flag to make it easier to avoid shipping it.

man/rules/meson.build

@@ -1030,7 +1030,10 @@ manpages = [
   ''],
  ['systemd-ask-password', '1', [], ''],
  ['systemd-backlight@.service', '8', ['systemd-backlight'], 'ENABLE_BACKLIGHT'],
- ['systemd-battery-check.service', '8', ['systemd-battery-check'], ''],
+ ['systemd-battery-check.service',
+  '8',
+  ['systemd-battery-check'],
+  'ENABLE_BATTERY_CHECK'],
  ['systemd-binfmt.service', '8', ['systemd-binfmt'], 'ENABLE_BINFMT'],
  ['systemd-bless-boot-generator', '8', [], 'ENABLE_BOOTLOADER'],
  ['systemd-bless-boot.service',

man/systemd-battery-check.service.xml

@@ -3,7 +3,8 @@
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
 <!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
 
-<refentry id="systemd-battery-check.service" xmlns:xi="http://www.w3.org/2001/XInclude">
+<refentry id="systemd-battery-check.service" conditional="ENABLE_BATTERY_CHECK"
+          xmlns:xi="http://www.w3.org/2001/XInclude">
 
   <refentryinfo>
     <title>systemd-battery-check</title>

meson.build

@@ -1793,6 +1793,8 @@ conf.set10('ENABLE_NSPAWN', feature.allowed())
 
 conf.set10('DEFAULT_MOUNTFSD_TRUSTED_DIRECTORIES', get_option('default-mountfsd-trusted-directories'))
 
+conf.set10('ENABLE_BATTERY_CHECK', get_option('battery-check').allowed())
+
 foreach tuple : [
                 ['analyze'],
                 ['backlight'],
@@ -3434,6 +3436,7 @@ foreach tuple : [
 
         # components
         ['backlight'],
+        ['battery-check'],
         ['binfmt'],
         ['bootloader'],
         ['bpf-framework',          conf.get('BPF_FRAMEWORK') == 1],

meson_options.txt

@@ -163,6 +163,8 @@ option('analyze', type: 'boolean', value: true,
        description : 'install systemd-analyze')
 option('backlight', type : 'boolean',
        description : 'install systemd-backlight')
+option('battery-check', type : 'feature',
+       description : 'install systemd-battery-check and associated files')
 option('binfmt', type : 'boolean',
        description : 'support for custom binary formats')
 option('coredump', type : 'boolean',

src/battery-check/meson.build

@@ -3,6 +3,7 @@
 executables += [
         libexec_template + {
                 'name' : 'systemd-battery-check',
+                'conditions' : ['ENABLE_BATTERY_CHECK'],
                 'sources' : files('battery-check.c'),
         },
 ]

test/units/TEST-74-AUX-UTILS.battery-check.sh

@@ -3,6 +3,11 @@
 set -eux
 set -o pipefail
 
+if [[ ! -x /usr/lib/systemd/systemd-battery-check ]]; then
+    echo "systemd-battery-check is not installed, skipping test."
+    exit 77
+fi
+
 /usr/lib/systemd/systemd-battery-check --help
 /usr/lib/systemd/systemd-battery-check --version
 

units/meson.build

@@ -65,7 +65,7 @@ units = [
         },
         {
           'file' : 'systemd-battery-check.service.in',
-          'conditions' : ['ENABLE_INITRD'],
+          'conditions' : ['ENABLE_BATTERY_CHECK', 'ENABLE_INITRD'],
           'symlinks' : ['initrd.target.wants/'],
         },
         {