add systemd unit install logic

meson.build

@@ -11,6 +11,7 @@ m_dep = cc.find_library('m', required : false)
 
 subdir('src')
 subdir('doc')
+subdir('services')
 
 executable('espeakup',
            espeakup_sources,

services/meson.build

@@ -0,0 +1,4 @@
+systemd = dependency('systemd', required: false)
+if systemd.found()
+    subdir('systemd')
+endif

services/systemd/espeakup.service.in

@@ -6,10 +6,10 @@ After=systemd-udev-settle.service sound.target
 
 [Service]
 Type=forking
-EnvironmentFile=/etc/conf.d/espeakup
+EnvironmentFile=@sysconfdir@/conf.d/espeakup.conf
 PIDFile=/run/espeakup.pid
-ExecStartPre=+/sbin/modprobe speakup_soft
-ExecStart=/usr/bin/espeakup --default-voice=${default_voice}
+ExecStartPre=+modprobe speakup_soft
+ExecStart=@bindir@/espeakup --default-voice=${default_voice}
 ExecReload=kill -HUP $MAINPID
 Restart=always
 

services/systemd/meson.build

@@ -0,0 +1,23 @@
+unitdir = systemd.get_pkgconfig_variable('systemdsystemunitdir')
+prefixdir = get_option('prefix')
+bindir = join_paths(prefixdir, get_option('bindir'))
+sysconfdir = join_paths(prefixdir, get_option('sysconfdir'))
+
+unit_conf = configuration_data()
+
+unit_conf.set('bindir', bindir)
+unit_conf.set('sysconfdir', sysconfdir)
+
+service_file = configure_file(
+    input : 'espeakup.service.in',
+    output : 'espeakup.service',
+    configuration : unit_conf
+)
+
+install_data(service_file,
+    install_dir : unitdir
+)
+
+install_data('espeakup.conf',
+    install_dir : join_paths(sysconfdir, 'conf.d')
+)