93 lines
3.1 KiB
Go
93 lines
3.1 KiB
Go
// Mgmt
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// Copyright (C) 2013-2024+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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package coresys
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import (
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"context"
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"github.com/purpleidea/mgmt/lang/funcs/facts"
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"github.com/purpleidea/mgmt/lang/types"
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)
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const (
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// HostnameFuncName is the name this fact is registered as. It's still a
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// Func Name because this is the name space the fact is actually using.
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HostnameFuncName = "hostname"
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)
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func init() {
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facts.ModuleRegister(ModuleName, HostnameFuncName, func() facts.Fact { return &HostnameFact{} }) // must register the fact and name
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}
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// HostnameFact is a function that returns the hostname.
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// TODO: support hostnames that change in the future.
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type HostnameFact struct {
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init *facts.Init
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}
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// String returns a simple name for this fact. This is needed so this struct can
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// satisfy the pgraph.Vertex interface.
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func (obj *HostnameFact) String() string {
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return HostnameFuncName
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}
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// Validate makes sure we've built our struct properly. It is usually unused for
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// normal facts that users can use directly.
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//func (obj *HostnameFact) Validate() error {
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// return nil
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//}
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// Info returns some static info about itself.
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func (obj *HostnameFact) Info() *facts.Info {
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return &facts.Info{
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Output: types.NewType("str"),
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}
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}
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// Init runs some startup code for this fact.
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func (obj *HostnameFact) Init(init *facts.Init) error {
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obj.init = init
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return nil
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}
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// Stream returns the single value that this fact has, and then closes.
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func (obj *HostnameFact) Stream(ctx context.Context) error {
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select {
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case obj.init.Output <- &types.StrValue{
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V: obj.init.Hostname,
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}:
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// pass
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case <-ctx.Done():
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return nil
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}
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close(obj.init.Output) // signal that we're done sending
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return nil
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}
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