terraform/state/remote/file.go

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package remote
import (
"bytes"
"crypto/md5"
"fmt"
"io"
"os"
)
func fileFactory(conf map[string]string) (Client, error) {
path, ok := conf["path"]
if !ok {
return nil, fmt.Errorf("missing 'path' configuration")
}
return &FileClient{
Path: path,
}, nil
}
// FileClient is a remote client that stores data locally on disk.
// This is only used for development reasons to test remote state... locally.
type FileClient struct {
Path string
}
func (c *FileClient) Get() (*Payload, error) {
var buf bytes.Buffer
f, err := os.Open(c.Path)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
defer f.Close()
if _, err := io.Copy(&buf, f); err != nil {
return nil, err
}
md5 := md5.Sum(buf.Bytes())
return &Payload{
Data: buf.Bytes(),
MD5: md5[:],
}, nil
}
func (c *FileClient) Put(data []byte) error {
f, err := os.Create(c.Path)
if err != nil {
return err
}
defer f.Close()
_, err = f.Write(data)
return err
}
func (c *FileClient) Delete() error {
return os.Remove(c.Path)
}