Initial commit

.gitignore

@@ -0,0 +1,18 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Jetbrains
+.idea

go.mod

@@ -0,0 +1,5 @@
+module cfconfig
+
+go 1.16
+
+require github.com/cloudfoundry-community/go-cfenv v1.18.0

go.sum

@@ -0,0 +1,35 @@
+github.com/cloudfoundry-community/go-cfenv v1.18.0 h1:dOIRSHUSaj4r6Q9Cx+nzz2OytHt+QNKqtOuKTQsa+zw=
+github.com/cloudfoundry-community/go-cfenv v1.18.0/go.mod h1:qGMSI6lygPzqugFs9M1NFjJBtEPgl0MgT6drMFZGUoU=
+github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/joefitzgerald/rainbow-reporter v0.1.0 h1:AuMG652zjdzI0YCCnXAqATtRBpGXMcAnrajcaTrSeuo=
+github.com/joefitzgerald/rainbow-reporter v0.1.0/go.mod h1:481CNgqmVHQZzdIbN52CupLJyoVwB10FQ/IQlF1pdL8=
+github.com/mitchellh/mapstructure v1.1.2 h1:fmNYVwqnSfB9mZU6OS2O6GsXM+wcskZDuKQzvN1EDeE=
+github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.8.0 h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=
+github.com/onsi/ginkgo v1.8.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.5.0 h1:izbySO9zDPmjJ8rDjLvkA2zJHIo+HkYXHnf7eN7SSyo=
+github.com/onsi/gomega v1.5.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
+github.com/sclevine/spec v1.2.0 h1:1Jwdf9jSfDl9NVmt8ndHqbTZ7XCCPbh1jI3hkDBHVYA=
+github.com/sclevine/spec v1.2.0/go.mod h1:W4J29eT/Kzv7/b9IWLB055Z+qvVC9vt0Arko24q7p+U=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd h1:nTDtHvHSdCn1m6ITfMRqtOd/9+7a3s8RBNOZ3eYZzJA=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f h1:wMNYb4v58l5UBM7MYRLPG6ZhfOqbKu7X5eyFl8ZhKvA=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e h1:o3PsSEY8E4eXWkXrIP9YJALUkVZqzHJT5DOasTyn8Vs=
+golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.1 h1:mUhvW9EsL+naU5Q3cakzfE91YhliOondGd6ZrsDBHQE=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

main.go

@@ -0,0 +1,85 @@
+package cfconfig
+
+import (
+	"github.com/cloudfoundry-community/go-cfenv"
+	"log"
+	"os"
+)
+
+type Env struct {
+	AppName string
+	Vars    map[string]string
+}
+
+type Requested []Request
+type Request struct {
+	Key    string
+	DevAlt string
+}
+
+//goland:noinspection GoUnusedGlobalVariable
+var (
+	InfoLogger          *log.Logger
+	ErrorLogger         *log.Logger
+	internalInfoLogger  *log.Logger
+	internalErrorLogger *log.Logger
+	env                 Env
+)
+
+func init() {
+	InfoLogger = log.New(os.Stdout, "", log.Lshortfile)
+	ErrorLogger = log.New(os.Stderr, "", log.Lshortfile)
+	internalInfoLogger = log.New(os.Stdout, "cfconfig: ", log.Lshortfile)
+	internalErrorLogger = log.New(os.Stderr, "cfconfig: ", log.Lshortfile)
+
+	env.Vars = make(map[string]string)
+}
+
+// LoadEnvironment loads either a dev or cf environment.
+// To set up a dev environment provide the dev fallbacks that you wish to use then.
+func LoadEnvironment(devAppName string, req Requested) Env {
+	if _, found := os.LookupEnv("VCAP_SERVICES"); found {
+		env = loadHaasEnvironment(req)
+	} else {
+		env = loadDevEnvironment(devAppName, req)
+	}
+	return env
+}
+
+func loadHaasEnvironment(requested Requested) Env {
+	internalInfoLogger.Print("Loading environment variables in Haas setup")
+
+	appEnv, err := cfenv.Current()
+	if err != nil {
+		internalErrorLogger.Println("Cannot load system-variables from cloud foundry!")
+		internalErrorLogger.Fatal(err)
+	}
+
+	env.AppName = appEnv.Name
+
+	for _, req := range requested {
+		var found bool
+		var value string
+		internalInfoLogger.Printf("Loading %s env variable.", req.Key)
+		value, found = os.LookupEnv(req.Key)
+		if !found {
+			internalErrorLogger.Fatalf("%s env variable is missing! Cannot start..", req.Key)
+		}
+		env.Vars[req.Key] = value
+	}
+
+	return env
+}
+
+func loadDevEnvironment(devAppName string, requested Requested) Env {
+	internalInfoLogger.Print("Loading environment variables in dev setup")
+
+	env.AppName = devAppName
+
+	for _, req := range requested {
+		internalInfoLogger.Printf("Loading %s env variable.", req.Key)
+		env.Vars[req.Key] = req.DevAlt
+	}
+
+	return env
+}