From 06011e07449a47a4929592116ba3d8ecdd021bee Mon Sep 17 00:00:00 2001
From: Knut Ahlers <knut@ahlers.me>
Date: Sun, 29 May 2016 01:56:12 +0200
Subject: [PATCH] Added environment helpers

---
 env/env.go            | 26 ++++++++++++++++++++
 env/env_suite_test.go | 13 ++++++++++
 env/env_test.go       | 55 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 env/env.go
 create mode 100644 env/env_suite_test.go
 create mode 100644 env/env_test.go

diff --git a/env/env.go b/env/env.go
new file mode 100644
index 0000000..14c9958
--- /dev/null
+++ b/env/env.go
@@ -0,0 +1,26 @@
+package env
+
+import "strings"
+
+// ListToMap converts a list of strings in format KEY=VALUE into a map
+func ListToMap(list []string) map[string]string {
+	out := map[string]string{}
+	for _, entry := range list {
+		if len(entry) == 0 || entry[0] == '#' {
+			continue
+		}
+
+		parts := strings.SplitN(entry, "=", 2)
+		out[parts[0]] = strings.Trim(parts[1], "\"")
+	}
+	return out
+}
+
+// MapToList converts a map into a list of strings in format KEY=VALUE
+func MapToList(envMap map[string]string) []string {
+	out := []string{}
+	for k, v := range envMap {
+		out = append(out, k+"="+v)
+	}
+	return out
+}
diff --git a/env/env_suite_test.go b/env/env_suite_test.go
new file mode 100644
index 0000000..0054723
--- /dev/null
+++ b/env/env_suite_test.go
@@ -0,0 +1,13 @@
+package env_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+func TestEnv(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Env Suite")
+}
diff --git a/env/env_test.go b/env/env_test.go
new file mode 100644
index 0000000..8cce912
--- /dev/null
+++ b/env/env_test.go
@@ -0,0 +1,55 @@
+package env_test
+
+import (
+	"sort"
+
+	. "github.com/Luzifer/go_helpers/env"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Env", func() {
+
+	Context("ListToMap", func() {
+		var (
+			list = []string{
+				"FIRST_KEY=firstvalue",
+				"SECOND_KEY=secondvalue",
+				"WEIRD=",
+				"",
+			}
+			emap = map[string]string{
+				"FIRST_KEY":  "firstvalue",
+				"SECOND_KEY": "secondvalue",
+				"WEIRD":      "",
+			}
+		)
+
+		It("should convert the list in the expected way", func() {
+			Expect(ListToMap(list)).To(Equal(emap))
+		})
+	})
+
+	Context("MapToList", func() {
+		var (
+			list = []string{
+				"FIRST_KEY=firstvalue",
+				"SECOND_KEY=secondvalue",
+				"WEIRD=",
+			}
+			emap = map[string]string{
+				"FIRST_KEY":  "firstvalue",
+				"SECOND_KEY": "secondvalue",
+				"WEIRD":      "",
+			}
+		)
+
+		It("should convert the map in the expected way", func() {
+			l := MapToList(emap)
+			sort.Strings(l) // Workaround: The test needs the elements to be in same order
+			Expect(l).To(Equal(list))
+		})
+	})
+
+})