75 lines
2.2 KiB
Go
75 lines
2.2 KiB
Go
// Mgmt
|
|
// Copyright (C) 2013-2018+ James Shubin and the project contributors
|
|
// Written by James Shubin <james@shubin.ca> and the project contributors
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package core // TODO: should this be in its own individual package?
|
|
|
|
import (
|
|
"github.com/purpleidea/mgmt/lang/funcs/facts"
|
|
"github.com/purpleidea/mgmt/lang/types"
|
|
)
|
|
|
|
func init() {
|
|
facts.Register("hostname", func() facts.Fact { return &HostnameFact{} }) // must register the fact and name
|
|
}
|
|
|
|
// HostnameFact is a function that returns the hostname.
|
|
// TODO: support hostnames that change in the future.
|
|
type HostnameFact struct {
|
|
init *facts.Init
|
|
closeChan chan struct{}
|
|
}
|
|
|
|
// Validate makes sure we've built our struct properly. It is usually unused for
|
|
// normal facts that users can use directly.
|
|
//func (obj *HostnameFact) Validate() error {
|
|
// return nil
|
|
//}
|
|
|
|
// Info returns some static info about itself.
|
|
func (obj *HostnameFact) Info() *facts.Info {
|
|
return &facts.Info{
|
|
Output: types.NewType("str"),
|
|
}
|
|
}
|
|
|
|
// Init runs some startup code for this const.
|
|
func (obj *HostnameFact) Init(init *facts.Init) error {
|
|
obj.init = init
|
|
obj.closeChan = make(chan struct{})
|
|
return nil
|
|
}
|
|
|
|
// Stream returns the single value that this const has, and then closes.
|
|
func (obj *HostnameFact) Stream() error {
|
|
select {
|
|
case obj.init.Output <- &types.StrValue{
|
|
V: obj.init.Hostname,
|
|
}:
|
|
// pass
|
|
case <-obj.closeChan:
|
|
return nil
|
|
}
|
|
close(obj.init.Output) // signal that we're done sending
|
|
return nil
|
|
}
|
|
|
|
// Close runs some shutdown code for this const and turns off the stream.
|
|
func (obj *HostnameFact) Close() error {
|
|
close(obj.closeChan)
|
|
return nil
|
|
}
|