mirror of
https://github.com/docker/compose.git
synced 2025-10-31 19:24:21 +01:00
102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
/*
|
|
Copyright 2020 Docker Compose CLI authors
|
|
|
|
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 config
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/pkg/errors"
|
|
|
|
"github.com/docker/compose-cli/api/context/store"
|
|
)
|
|
|
|
type dirKey struct{}
|
|
|
|
// WithDir sets the config directory path in the context
|
|
func WithDir(ctx context.Context, path string) context.Context {
|
|
return context.WithValue(ctx, dirKey{}, path)
|
|
}
|
|
|
|
// Dir returns the config directory path
|
|
func Dir(ctx context.Context) string {
|
|
cd, _ := ctx.Value(dirKey{}).(string)
|
|
return cd
|
|
}
|
|
|
|
// LoadFile loads the docker configuration
|
|
func LoadFile(dir string) (*File, error) {
|
|
f := &File{}
|
|
err := loadFile(configFilePath(dir), &f)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return f, nil
|
|
}
|
|
|
|
// WriteCurrentContext writes the selected current context to the Docker
|
|
// configuration file. Note, the validity of the context is not checked.
|
|
func WriteCurrentContext(dir string, name string) error {
|
|
m := map[string]interface{}{}
|
|
path := configFilePath(dir)
|
|
err := loadFile(path, &m)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Match existing CLI behavior
|
|
if name == store.DefaultContextName {
|
|
delete(m, currentContextKey)
|
|
} else {
|
|
m[currentContextKey] = name
|
|
}
|
|
return writeFile(path, m)
|
|
}
|
|
|
|
func writeFile(path string, content map[string]interface{}) error {
|
|
d, err := json.MarshalIndent(content, "", "\t")
|
|
if err != nil {
|
|
return errors.Wrap(err, "unable to marshal config")
|
|
}
|
|
err = ioutil.WriteFile(path, d, 0644)
|
|
return errors.Wrap(err, "unable to write config file")
|
|
}
|
|
|
|
func loadFile(path string, dest interface{}) error {
|
|
data, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
// Not an error if there is no config, we're just using defaults
|
|
return nil
|
|
}
|
|
return errors.Wrap(err, "unable to read config file")
|
|
}
|
|
err = json.Unmarshal(data, dest)
|
|
return errors.Wrap(err, "unable to unmarshal config file "+path)
|
|
}
|
|
|
|
func configFilePath(dir string) string {
|
|
return filepath.Join(dir, ConfigFileName)
|
|
}
|
|
|
|
// File contains the current context from the docker configuration file
|
|
type File struct {
|
|
CurrentContext string `json:"currentContext,omitempty"`
|
|
}
|