initial import

configuration/application-configuration/cmd/main.go

@@ -0,0 +1,28 @@
+/*Package main show how to use envconfig.
+
+Start the app in the root folder with:
+
+	SERVER_PORT=8080 SERVER_HOST=localhost go run cmd/main.go
+
+*/
+package main
+
+import (
+	"fmt"
+
+	"github.com/kelseyhightower/envconfig"
+	"golang.source-fellows.com/samples/applicationconfiguration"
+)
+
+func main() {
+
+	cfg := applicationconfiguration.Config{}
+	err := envconfig.Process("", &cfg)
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(cfg.Server.Port)
+
+}

configuration/application-configuration/configuration.go

@@ -0,0 +1,12 @@
+package applicationconfiguration
+
+type Config struct {
+	Server struct {
+		Port string `envconfig:"SERVER_PORT" required:"true"`
+		Host string `envconfig:"SERVER_HOST" required:"true"`
+	}
+	Database struct {
+		Username string `envconfig:"DB_USERNAME"`
+		Password string `envconfig:"DB_PASSWORD"`
+	}
+}

configuration/application-configuration/go.mod

@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/applicationconfiguration
+
+go 1.14
+
+require github.com/kelseyhightower/envconfig v1.4.0 // indirect

configuration/application-configuration/go.sum

@@ -0,0 +1,2 @@
+github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
+github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=