Convert to Lua!.

scripts/start-kapow/.files/__ll/start-kapow.lua

@@ -0,0 +1,90 @@
+local env = {
+  VERSION = '0.7.0';
+     BIND = '0.0.0.69:60080';
+  CONTROL = '0.0.0.69:60081';
+     DATA = '0.0.0.69:60082';
+     ROOT = '/srv/kapow';
+      POW = 'src/index.pow';
+}
+local test = exec.cmd 'test'; test.errexit = true
+
+test.error = 'Missing systemd-networkd.service.'
+test '-f /usr/lib/systemd/system/systemd-networkd.service'
+
+local systemctl = exec.cmd 'systemctl'
+systemctl 'disable --now systemd-networkd.service'
+systemctl 'enable --now systemd-networkd.service'
+systemctl 'restart systemd-networkd.service'
+
+test.error = 'Missing ll executable.'
+test('-x %s/bin/ll', env.ROOT)
+
+test.error = 'Missing kapow executable.'
+test('-x %s/bin/kapow.v%s', env.ROOT, env.VERSION)
+
+test.error = string.format('Missing %s/%s.', env.ROOT, env.POW)
+local chmod = exec.cmd 'chmod'
+chmod('+x %s/%s', env.ROOT, env.POW)
+
+systemctl 'disable --now kapow.service'
+
+local unit = [[
+[Unit]
+Description=kapow
+
+[Install]
+WantedBy=multi-user.target
+
+[Service]
+Restart=always
+RestartSec=5
+SystemCallArchitectures=native
+MemoryDenyWriteExecute=true
+LockPersonality=yes
+NoNewPrivileges=yes
+RemoveIPC=yes
+DevicePolicy=closed
+PrivateTmp=yes
+PrivateNetwork=false
+PrivateDevices=true
+ProtectKernelModules=yes
+ProtectSystem=full
+ProtectHome=yes
+ProtectKernelTunables=yes
+ProtectKernelLogs=yes
+ProtectClock=yes
+RestrictRealtime=yes
+RestrictSUIDSGID=yes
+#CapabilityBoundingSet=CAP_NET_BIND_SERVICE
+#AmbientCapabilities=CAP_NET_BIND_SERVICE
+RestrictAddressFamilies=AF_INET
+SystemCallFilter=~bpf process_vm_writev process_vm_readv perf_event_open kcmp lookup_dcookie move_pages swapon swapoff userfaultfd unshare
+SystemCallFilter=~@cpu-emulation @debug @module @obsolete @keyring @clock @raw-io @clock @swap @reboot
+ProtectControlGroups=yes
+RestrictNamespaces=yes
+DynamicUser=yes
+StateDirectory=kapow
+LogsDirectory=kapow
+CacheDirectory=kapow
+InaccessiblePaths=/usr /bin /proc /sys /sbin /opt /lib64 /lib /boot
+TemporaryFileSystem=/srv:ro
+BindReadOnlyPaths=__ROOT__
+WorkingDirectory=__ROOT__
+ExecStart=__ROOT__/bin/kapow.v__VERSION__ server --debug --control-reachable-addr '__CONTROL__' --bind __BIND__ --control-bind __CONTROL__ --data-bind __DATA__ __POW__
+]]
+
+fs.write('/etc/systemd/system/kapow.service', unit)
+
+local sed = exec.cmd 'sed'
+sed.errexit = true
+
+sed('-i s|__VERSION__|%s| /etc/systemd/system/kapow.service', env.VERSION)
+sed('-i s|__BIND__|%s| /etc/systemd/system/kapow.service', env.BIND)
+sed('-i s|__CONTROL__|%s|g /etc/systemd/system/kapow.service', env.CONTROL)
+sed('-i s|__DATA__|%s| /etc/systemd/system/kapow.service', env.DATA)
+sed('-i s|__POW__|%s| /etc/systemd/system/kapow.service', env.POW)
+sed('-i s|__ROOT__|%s|g /etc/systemd/system/kapow.service', env.ROOT)
+
+systemctl.errexit = true
+systemctl 'daemon-reload'
+systemctl 'enable --now kapow.service'

scripts/start-kapow/script

@@ -1,79 +1 @@
-VERSION="0.7.0"
-BIND="0.0.0.69:60080"
-CONTROL="0.0.0.69:60081"
-DATA="0.0.0.69:60082"
-ROOT="/srv/kapow"
-POW="src/index.pow"
-
-test -f /usr/lib/systemd/system/systemd-networkd.service ||
-{ printf >&2 "Missing systemd-networkd service.\n"; exit 1; }
-
-systemctl disable --now systemd-networkd.service 2>&- || :
-systemctl enable --now systemd-networkd.service 2>&- || :
-systemctl restart systemd-networkd.service 2>&-
-
-test -x "${ROOT}/bin/ll" ||
-{ printf >&2 "Missing ll executable.\n"; exit 1; }
-
-test -x "${ROOT}/bin/kapow.v${VERSION}" ||
-{ printf >&2 "Missing kapow executable.\n"; exit 1; }
-
-test -f "${ROOT}/${POW}" ||
-{ printf >&2 "Missing ${ROOT}/${POW}.\n"; exit 1; }
-chmod +x "${ROOT}/${POW}"
-
-systemctl disable --now kapow.service || :
-cat > "/etc/systemd/system/kapow.service" <<-'EOS'
-[Unit]
-Description=kapow
-
-[Install]
-WantedBy=multi-user.target
-
-[Service]
-Restart=always
-RestartSec=5
-SystemCallArchitectures=native
-MemoryDenyWriteExecute=true
-LockPersonality=yes
-NoNewPrivileges=yes
-RemoveIPC=yes
-DevicePolicy=closed
-PrivateTmp=yes
-PrivateNetwork=false
-PrivateDevices=true
-ProtectKernelModules=yes
-ProtectSystem=full
-ProtectHome=yes
-ProtectKernelTunables=yes
-ProtectKernelLogs=yes
-ProtectClock=yes
-RestrictRealtime=yes
-RestrictSUIDSGID=yes
-#CapabilityBoundingSet=CAP_NET_BIND_SERVICE
-#AmbientCapabilities=CAP_NET_BIND_SERVICE
-RestrictAddressFamilies=AF_INET
-SystemCallFilter=~bpf process_vm_writev process_vm_readv perf_event_open kcmp lookup_dcookie move_pages swapon swapoff userfaultfd unshare
-SystemCallFilter=~@cpu-emulation @debug @module @obsolete @keyring @clock @raw-io @clock @swap @reboot
-ProtectControlGroups=yes
-RestrictNamespaces=yes
-DynamicUser=yes
-StateDirectory=kapow
-LogsDirectory=kapow
-CacheDirectory=kapow
-InaccessiblePaths=/usr /bin /proc /sys /sbin /opt /lib64 /lib /boot
-TemporaryFileSystem=/srv:ro
-BindReadOnlyPaths=__ROOT__
-WorkingDirectory=__ROOT__
-ExecStart=__ROOT__/bin/kapow.v__VERSION__ server --debug --control-reachable-addr '__CONTROL__' --bind __BIND__ --control-bind __CONTROL__ --data-bind __DATA__ __POW__
-EOS
-
-sed -i "s|__VERSION__|${VERSION}|" /etc/systemd/system/kapow.service
-sed -i "s|__BIND__|${BIND}|" /etc/systemd/system/kapow.service
-sed -i "s|__CONTROL__|${CONTROL}|g" /etc/systemd/system/kapow.service
-sed -i "s|__DATA__|${DATA}|" /etc/systemd/system/kapow.service
-sed -i "s|__POW__|${POW}|" /etc/systemd/system/kapow.service
-sed -i "s|__ROOT__|${ROOT}|g" /etc/systemd/system/kapow.service
-
-systemctl daemon-reload
-systemctl enable --now kapow.service
+/usr/bin/ll /__ll/start-kapow.lua