cloudinit/datasource/file/file.go

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// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package file
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import (
"io/ioutil"
"os"
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)
type localFile struct {
path string
}
func NewDatasource(path string) *localFile {
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return &localFile{path}
}
func (f *localFile) IsAvailable() bool {
_, err := os.Stat(f.path)
return !os.IsNotExist(err)
}
func (f *localFile) AvailabilityChanges() bool {
return true
}
func (f *localFile) ConfigRoot() string {
return ""
}
func (f *localFile) FetchMetadata() ([]byte, error) {
return []byte{}, nil
}
func (f *localFile) FetchUserdata() ([]byte, error) {
return ioutil.ReadFile(f.path)
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}
func (f *localFile) FetchNetworkConfig(filename string) ([]byte, error) {
return nil, nil
}
func (f *localFile) Type() string {
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return "local-file"
}