dexafree / envy

Envy makes working with ENV variables in Go trivial.

envy

Envy makes working with ENV variables in Go trivial.

• Get ENV variables with default values.
• Set ENV variables safely without affecting the underlying system.
• Temporarily change ENV vars; useful for testing.
• Map all of the key/values in the ENV.
• More!

Installation

$ go get -u github.com/gobuffalo/envy

Usage

func Test_Get(t *testing.T) {
	r := require.New(t)
	r.NotZero(os.Getenv("GOPATH"))
	r.Equal(os.Getenv("GOPATH"), envy.Get("GOPATH", "foo"))
	r.Equal("bar", envy.Get("IDONTEXIST", "bar"))
}

func Test_MustGet(t *testing.T) {
	r := require.New(t)
	r.NotZero(os.Getenv("GOPATH"))
	v, err := envy.MustGet("GOPATH")
	r.NoError(err)
	r.Equal(os.Getenv("GOPATH"), v)

	_, err = envy.MustGet("IDONTEXIST")
	r.Error(err)
}

func Test_Set(t *testing.T) {
	r := require.New(t)
	_, err := envy.MustGet("FOO")
	r.Error(err)

	envy.Set("FOO", "foo")
	r.Equal("foo", envy.Get("FOO", "bar"))
}

func Test_Temp(t *testing.T) {
	r := require.New(t)

	_, err := envy.MustGet("BAR")
	r.Error(err)

	envy.Temp(func() {
		envy.Set("BAR", "foo")
		r.Equal("foo", envy.Get("BAR", "bar"))
		_, err = envy.MustGet("BAR")
		r.NoError(err)
	})

	_, err = envy.MustGet("BAR")
	r.Error(err)
}