CopyDir recursively copies a directory tree, attempting to preserve permissions.

CopyFile copies the contents of the file named src to the file named by dst.

Simple helper function to read an environment or return a default value.

Helper to read an environment variable into a bool or return default value.

Simple helper function to read an environment variable into integer or return a default value.

Helper to read an environment variable into a string slice or return default value.

stringifyKeysMapValue recurses into in and changes all instances of map[interface{}]interface{} to map[string]interface{}.

https://play.golang.org/p/k8bws03uid.

UnsetEnv unsets all envars having prefix and returns a function that restores the env.