From 8fd5e5deda3fffc2c799387098466b3ada3f37b7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20D=C3=B6ll?= <sebastian@katallaxie.dev>
Date: Sat, 11 Jan 2025 20:08:54 +0000
Subject: [PATCH] feat(envx): add env

---
 envx/env.go      | 25 +++++++++++++++++++++++++
 envx/env_test.go | 26 ++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 envx/env.go
 create mode 100644 envx/env_test.go

diff --git a/envx/env.go b/envx/env.go
new file mode 100644
index 0000000..7f2c16b
--- /dev/null
+++ b/envx/env.go
@@ -0,0 +1,25 @@
+package envx
+
+// Env is the environment variables.
+type Env map[string]string
+
+// Copy returns a copy of the environment.
+func (e Env) Copy() Env {
+	out := Env{}
+	for k, v := range e {
+		out[k] = v
+	}
+
+	return out
+}
+
+// Strings returns the current environment as a list of strings, suitable for
+// os executions.
+func (e Env) Strings() []string {
+	result := make([]string, 0, len(e))
+	for k, v := range e {
+		result = append(result, k+"="+v)
+	}
+
+	return result
+}
diff --git a/envx/env_test.go b/envx/env_test.go
new file mode 100644
index 0000000..e19cb46
--- /dev/null
+++ b/envx/env_test.go
@@ -0,0 +1,26 @@
+package envx_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/zeiss/pkg/envx"
+)
+
+func TestEnv(t *testing.T) {
+	t.Parallel()
+
+	// Create a new environment.
+	e := envx.Env{
+		"key1": "value1",
+		"key2": "value2",
+	}
+
+	e2 := e.Copy()
+	assert.Equal(t, e, e2)
+
+	strings := e.Strings()
+	assert.Len(t, strings, 2)
+	assert.Contains(t, strings, "key1=value1")
+	assert.Contains(t, strings, "key2=value2")
+}