env

type Env interface {
	// Len returns the number of variables present
	Len() (count int)
	// Clear deletes all Env variables
	Clear()
	// Environ returns a copy of all the underlying keys and values in the
	// form of "key=value"
	Environ() (variables []string)
	// Clone returns a complete duplicate of the current Env, changes to
	// a clone do not have any effect upon the original Env
	Clone() (clone Env)
	// Export updates the actual os environment, calling os.Setenv for each
	// variable present. Export stops at the first error
	Export() (err error)
	// Import updates the Env instance with the given `environment`
	// variables, in the form of "key=value". Inputs missing the equal sign are
	// ignored and all values have any quotes trimmed. Quotations are detected
	// when the first and last characters are the same and are one of the
	// following: backtick (&96;), quote (') or double quote (")
	Import(environment []string)
	// Include applies all variables within the others to this Env instance.
	// Note that keys are not deleted and any existing keys are clobbered by
	// the others, in the order the others are given
	Include(others ...Env)
	// WriteEnvDir makes the given directory path if it doesn't exist already
	// and then for each key/value pair in the Env, creates a file named with
	// the key and the value as the contents
	WriteEnvDir(path string) (err error)
	// Expand replaces all `$key` and `${key}` references in the `input` string
	// with their corresponding `key` values. Any references not present within
	// the Env are replaced with empty strings
	Expand(input string) (expanded string)
	// Get looks for the variable `key` and if `present` returns the exact
	// `value`
	Get(key string) (value string, present bool)
	// Set updates the Env `key` with the given `value`
	Set(key, value string)
	// Unset removes the `key` from the Env
	Unset(key string)
	// Bool transforms the value associated with `key` into a boolean state. If
	// the value is not a detectable state, `def` is returned. Detection is
	// handled by the github.com/go-corelibs/strings package IsTrue and IsFalse
	// functions
	Bool(key string, def bool) (state bool)
	// Int uses strconv.Atoi to transform the value associated with `key` and
	// if not present or strconv.Atoi encountered an error, returns `def`
	Int(key string, def int) (number int)
	// Float uses strconv.ParseFloat to transform the value associated with
	// `key` and if not present or strconv.ParseFloat encountered an error,
	// returns `def`
	Float(key string, def float64) (decimal float64)
	// String uses strings.TrimSpace to transform the value associated with
	// `key` and if not present, returns `def`
	String(key string, def string) (value string)
}