feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

internal/netaddr/macaddr.go

@@ -0,0 +1,43 @@
+package netaddr
+
+import (
+	"database/sql/driver"
+	"errors"
+	"net"
+)
+
+// Macaddr is a wrapper for transferring Macaddr values back and forth easily.
+type Macaddr struct {
+	Macaddr net.HardwareAddr
+	Valid   bool
+}
+
+// Scan implements the Scanner interface.
+func (m *Macaddr) Scan(value interface{}) error {
+	m.Macaddr = nil
+	m.Valid = false
+	if value == nil {
+		m.Valid = false
+		return nil
+	}
+	macaddrAsBytes, ok := value.([]byte)
+	if !ok {
+		return errors.New("could not convert scanned value to bytes")
+	}
+	parsedMacaddr, parseErr := net.ParseMAC(string(macaddrAsBytes))
+	if parseErr != nil {
+		return parseErr
+	}
+	m.Valid = true
+	m.Macaddr = parsedMacaddr
+	return nil
+}
+
+// Value implements the driver Valuer interface. Note if m.Valid is false
+// or m.Macaddr is nil the database column value will be set to NULL.
+func (m Macaddr) Value() (driver.Value, error) {
+	if !m.Valid || m.Macaddr == nil {
+		return nil, nil
+	}
+	return []byte(m.Macaddr.String()), nil
+}