mirror of
https://github.com/jimeh/envctl.git
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122 lines
3.4 KiB
Go
122 lines
3.4 KiB
Go
package envctl_test
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import (
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"fmt"
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"os"
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"github.com/jimeh/envctl"
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)
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func Example_basic() {
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os.Setenv("PORT", "8080")
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envctl.With(map[string]string{"BIND": "0.0.0.0", "PORT": "3000"}, func() {
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fmt.Println(os.Getenv("BIND") + ":" + os.Getenv("PORT"))
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})
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fmt.Println(os.Getenv("BIND") + ":" + os.Getenv("PORT"))
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// Output:
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// 0.0.0.0:3000
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// :8080
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}
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func ExampleWith() {
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// existing environment variables
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os.Setenv("MYAPP_HOSTNAME", "myapp.com")
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os.Setenv("MYAPP_PORT", "80")
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fmt.Println("Before:")
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fmt.Printf(" - MYAPP_HOSTNAME=%s\n", os.Getenv("MYAPP_HOSTNAME"))
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fmt.Printf(" - MYAPP_PORT=%s\n", os.Getenv("MYAPP_PORT"))
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fmt.Printf(" - MYAPP_THEME=%s\n", os.Getenv("MYAPP_THEME"))
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fmt.Printf(" - MYAPP_TESTING=%s\n", os.Getenv("MYAPP_TESTING"))
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// temporary environment variables
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env := map[string]string{
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"MYAPP_HOSTNAME": "testing-myapp.test",
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"MYAPP_TESTING": "unit",
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}
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envctl.With(env, func() {
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os.Setenv("MYAPP_THEME", "dark")
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fmt.Println("Inside func:")
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fmt.Printf(" - MYAPP_HOSTNAME=%s\n", os.Getenv("MYAPP_HOSTNAME"))
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fmt.Printf(" - MYAPP_PORT=%s\n", os.Getenv("MYAPP_PORT"))
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fmt.Printf(" - MYAPP_THEME=%s\n", os.Getenv("MYAPP_THEME"))
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fmt.Printf(" - MYAPP_TESTING=%s\n", os.Getenv("MYAPP_TESTING"))
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})
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// original environment variables restored
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fmt.Println("After:")
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fmt.Printf(" - MYAPP_HOSTNAME=%s\n", os.Getenv("MYAPP_HOSTNAME"))
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fmt.Printf(" - MYAPP_PORT=%s\n", os.Getenv("MYAPP_PORT"))
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fmt.Printf(" - MYAPP_THEME=%s\n", os.Getenv("MYAPP_THEME"))
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fmt.Printf(" - MYAPP_TESTING=%s\n", os.Getenv("MYAPP_TESTING"))
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// Output:
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// Before:
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// - MYAPP_HOSTNAME=myapp.com
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// - MYAPP_PORT=80
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// - MYAPP_THEME=
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// - MYAPP_TESTING=
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// Inside func:
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// - MYAPP_HOSTNAME=testing-myapp.test
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// - MYAPP_PORT=80
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// - MYAPP_THEME=dark
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// - MYAPP_TESTING=unit
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// After:
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// - MYAPP_HOSTNAME=myapp.com
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// - MYAPP_PORT=80
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// - MYAPP_THEME=
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// - MYAPP_TESTING=
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}
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func ExampleWithClean() {
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// existing environment variables
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os.Setenv("MYAPP_HOSTNAME", "myapp.com")
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os.Setenv("MYAPP_PORT", "80")
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fmt.Println("Before:")
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fmt.Printf(" - MYAPP_HOSTNAME=%s\n", os.Getenv("MYAPP_HOSTNAME"))
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fmt.Printf(" - MYAPP_PORT=%s\n", os.Getenv("MYAPP_PORT"))
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fmt.Printf(" - MYAPP_THEME=%s\n", os.Getenv("MYAPP_THEME"))
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fmt.Printf(" - MYAPP_TESTING=%s\n", os.Getenv("MYAPP_TESTING"))
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// temporary environment variables
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env := map[string]string{
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"MYAPP_HOSTNAME": "testing-myapp.test",
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"MYAPP_TESTING": "unit",
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}
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envctl.WithClean(env, func() {
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os.Setenv("MYAPP_THEME", "dark")
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fmt.Println("Inside func:")
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fmt.Printf(" - MYAPP_HOSTNAME=%s\n", os.Getenv("MYAPP_HOSTNAME"))
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fmt.Printf(" - MYAPP_PORT=%s\n", os.Getenv("MYAPP_PORT"))
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fmt.Printf(" - MYAPP_THEME=%s\n", os.Getenv("MYAPP_THEME"))
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fmt.Printf(" - MYAPP_TESTING=%s\n", os.Getenv("MYAPP_TESTING"))
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})
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// original environme
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fmt.Println("After:")
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fmt.Printf(" - MYAPP_HOSTNAME=%s\n", os.Getenv("MYAPP_HOSTNAME"))
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fmt.Printf(" - MYAPP_PORT=%s\n", os.Getenv("MYAPP_PORT"))
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fmt.Printf(" - MYAPP_THEME=%s\n", os.Getenv("MYAPP_THEME"))
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fmt.Printf(" - MYAPP_TESTING=%s\n", os.Getenv("MYAPP_TESTING"))
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// Output:
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// Before:
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// - MYAPP_HOSTNAME=myapp.com
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// - MYAPP_PORT=80
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// - MYAPP_THEME=
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// - MYAPP_TESTING=
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// Inside func:
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// - MYAPP_HOSTNAME=testing-myapp.test
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// - MYAPP_PORT=
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// - MYAPP_THEME=dark
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// - MYAPP_TESTING=unit
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// After:
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// - MYAPP_HOSTNAME=myapp.com
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// - MYAPP_PORT=80
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// - MYAPP_THEME=
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// - MYAPP_TESTING=
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}
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