add meson build files

Closes #116.
Closes #171.
Closes #172.
Closes #175.

sh/meson.build

@@ -0,0 +1,84 @@
+sh_conf_data = configuration_data()
+if root_prefix == '/'
+  sh_conf_data.set('PREFIX', '')
+  else
+  sh_conf_data.set('PREFIX', root_prefix)
+endif
+sh_conf_data.set('BINDIR', bindir)
+sh_conf_data.set('LIBEXECDIR', rc_libexecdir)
+sh_conf_data.set('LOCAL_PREFIX', local_prefix)
+sh_conf_data.set('PKG_PREFIX', pkg_prefix)
+sh_conf_data.set('SBINDIR', sbindir)
+sh_conf_data.set('SHELL', get_option('shell'))
+sh_conf_data.set('SYSCONFDIR', get_option('sysconfdir'))
+
+sh_dir = rc_libexecdir / 'sh'
+
+sh = [
+  'rc-functions.sh',
+  'rc-mount.sh',
+  'runit.sh',
+  's6.sh',
+  'start-stop-daemon.sh',
+  'supervise-daemon.sh',
+  ]
+
+sh_config = [
+  'functions.sh.in',
+  ]
+
+scripts_config = [
+  'gendepends.sh.in',
+  'openrc-run.sh.in',
+  ]
+
+if os == 'Linux'
+  sh += [
+    'rc-cgroup.sh',
+    ]
+  scripts_config += [
+    'binfmt.sh.in',
+    'cgroup-release-agent.sh.in',
+   ]
+  scripts_config_os = [
+    ['init-early.sh.Linux.in', 'init-early.sh'],
+    ['init.sh.Linux.in', 'init.sh'],
+    ]
+elif os == 'GNU'
+  scripts_config_os = [
+    ['init.sh.GNU.in', 'init.sh'],
+    ]
+elif os == 'Gnu-KFreeBSD'
+  scripts_config_os = [
+    ['init.sh.GNU-kFreeBSD.in', 'init.sh'],
+    ]
+else
+  scripts_config_os = [
+    ['init.sh.BSD.in', 'init.sh'],
+    ]
+endif
+
+install_data(sh,
+  install_dir : sh_dir)
+foreach file : sh_config
+  configure_file(input : file,
+    output : '@BASENAME@',
+    configuration : sh_conf_data,
+    install_dir : sh_dir)
+endforeach
+
+foreach file : scripts_config
+  configure_file(input : file,
+    output : '@BASENAME@',
+    configuration : sh_conf_data,
+    install_dir : sh_dir,
+    install_mode : 'rwxr-xr-x')
+endforeach
+
+foreach file : scripts_config_os
+  configure_file(input : file.get(0),
+    output : file.get(1),
+    configuration : sh_conf_data,
+    install_dir : sh_dir,
+    install_mode : 'rwxr-xr-x')
+endforeach