Set settings from environment variables

gateway/.editorconfig

@@ -0,0 +1,4 @@
+[*]
+indent_style = tab
+indent_size = 2
+

gateway/influx/influx.go

@@ -7,6 +7,7 @@ import (
 	influxdb2Api "github.com/influxdata/influxdb-client-go/v2/api"
 	influxdb2Write "github.com/influxdata/influxdb-client-go/v2/api/write"
 	"log"
+	"os"
 	"time"
 )
 
@@ -17,6 +18,21 @@ type Settings struct {
 	Token  string
 }
 
+func (s *Settings) SetFromEnvironment() {
+	if s.Uri == "" {
+		s.Uri = os.Getenv("INFLUX_URI")
+	}
+	if s.Org == "" {
+		s.Org = os.Getenv("INFLUX_ORG")
+	}
+	if s.Bucket == "" {
+		s.Bucket = os.Getenv("INFLUX_BUCKET")
+	}
+	if s.Token == "" {
+		s.Token = os.Getenv("INFLUX_TOKEN")
+	}
+}
+
 func (s *Settings) validate() error {
 	if s.Uri == "" {
 		return errors.New("InfluxDB URI not set")

gateway/main.go

@@ -22,6 +22,8 @@ func main() {
 	flag.StringVar(&infs.Token, "influx.token", "", "InfluxDB access token")
 
 	flag.Parse()
+	mqts.SetFromEnvironment()
+	infs.SetFromEnvironment()
 
 	sender, err := influx.NewWriter(infs)
 	if err != nil {

gateway/mqtt/mqtt.go

@@ -6,6 +6,7 @@ import (
 	"github.com/hg/airmon/mon"
 	"github.com/pkg/errors"
 	"log"
+	"os"
 	"strings"
 )
 
@@ -15,6 +16,18 @@ type Settings struct {
 	Pass   string
 }
 
+func (s *Settings) SetFromEnvironment() {
+	if s.Broker == "" {
+		s.Broker = os.Getenv("MQTT_BROKER")
+	}
+	if s.User == "" {
+		s.User = os.Getenv("MQTT_USER")
+	}
+	if s.Pass == "" {
+		s.Pass = os.Getenv("MQTT_PASS")
+	}
+}
+
 func (s *Settings) validate() error {
 	if s.Broker == "" {
 		return errors.New("MQTT broker is empty")

gateway/settings/settings.go

@@ -0,0 +1,3 @@
+package settings
+
+