launchpad.net/~rogpeppe/juju-core/500-errgo-fix@v0.0.0-20140213181702-000000002356/environs/errors.go (about) 1 // Copyright 2011, 2012, 2013 Canonical Ltd. 2 // Licensed under the AGPLv3, see LICENCE file for details. 3 4 package environs 5 6 import ( 7 "errors" 8 ) 9 10 var ( 11 ErrNotBootstrapped = errors.New("environment is not bootstrapped") 12 ErrNoInstances = errors.New("no instances found") 13 ErrPartialInstances = errors.New("only some instances were found") 14 ) 15 16 // containersUnsupportedError indicates that the environment does not support 17 // creation of containers. 18 type containersUnsupportedError struct { 19 msg string 20 } 21 22 func (e *containersUnsupportedError) Error() string { 23 return e.msg 24 } 25 26 // IsContainersUnsupportedError reports whether the error 27 // was created by NewContainersUnsupportedError. 28 func IsContainersUnsupportedError(err error) bool { 29 _, ok := err.(*containersUnsupportedError) 30 return ok 31 } 32 33 // NewContainersUnsupportedError returns a new error 34 // which satisfies IsContainersUnsupported and reports 35 // the given message. 36 func NewContainersUnsupported(msg string) error { 37 return &containersUnsupportedError{msg: msg} 38 }