github.com/wallyworld/juju@v0.0.0-20161013125918-6cf1bc9d917a/worker/uniter/operation/errors.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package operation
     5  
     6  import (
     7  	"fmt"
     8  
     9  	"github.com/juju/errors"
    10  	corecharm "gopkg.in/juju/charm.v6-unstable"
    11  )
    12  
    13  var (
    14  	ErrNoStateFile            = errors.New("uniter state file does not exist")
    15  	ErrSkipExecute            = errors.New("operation already executed")
    16  	ErrNeedsReboot            = errors.New("reboot request issued")
    17  	ErrHookFailed             = errors.New("hook failed")
    18  	ErrCannotAcceptLeadership = errors.New("cannot accept leadership")
    19  )
    20  
    21  type deployConflictError struct {
    22  	charmURL *corecharm.URL
    23  }
    24  
    25  func (err *deployConflictError) Error() string {
    26  	return fmt.Sprintf("cannot deploy charm %s", err.charmURL)
    27  }
    28  
    29  // NewDeployConflictError returns an error indicating that the charm with
    30  // the supplied URL failed to deploy.
    31  func NewDeployConflictError(charmURL *corecharm.URL) error {
    32  	return &deployConflictError{charmURL}
    33  }
    34  
    35  // IsDeployConflictError returns true if the error is a
    36  // deploy conflict error.
    37  func IsDeployConflictError(err error) bool {
    38  	_, ok := err.(*deployConflictError)
    39  	return ok
    40  }