func (t *HelpToolCommand) Init(args []string) error {
tool, err := cmd.ZeroOrOneArgs(args)
if err == nil {
t.tool = tool
}
return err
}
func (s *CmdSuite) TestZeroOrOneArgs(c *gc.C) {
expectValue := func(args []string, expected string) {
arg, err := cmd.ZeroOrOneArgs(args)
c.Assert(arg, gc.Equals, expected)
c.Assert(err, gc.IsNil)
}
expectValue(nil, "")
expectValue([]string{}, "")
expectValue([]string{"foo"}, "foo")
arg, err := cmd.ZeroOrOneArgs([]string{"foo", "bar"})
c.Assert(arg, gc.Equals, "")
c.Assert(err, gc.ErrorMatches, `unrecognized args: \["bar"\]`)
}
func (c *GetEnvironmentCommand) Init(args []string) (err error) {
if err := c.EnvCommandBase.EnsureEnvName(); err != nil {
return err
}
c.key, err = cmd.ZeroOrOneArgs(args)
return
}
func (c *AddMachineCommand) Init(args []string) error {
if err := c.EnvCommandBase.EnsureEnvName(); err != nil {
return err
}
if c.Constraints.Container != nil {
return fmt.Errorf("container constraint %q not allowed when adding a machine", *c.Constraints.Container)
}
placement, err := cmd.ZeroOrOneArgs(args)
if err != nil {
return err
}
c.Placement, err = instance.ParsePlacement(placement)
if err == instance.ErrPlacementScopeMissing {
placement = c.EnvironName() + ":" + placement
c.Placement, err = instance.ParsePlacement(placement)
}
if err != nil {
return err
}
return nil
}
func (c *SwitchCommand) Init(args []string) (err error) {
c.EnvName, err = cmd.ZeroOrOneArgs(args)
return
}