mirror of
https://github.com/docker/compose.git
synced 2025-10-31 11:14:02 +01:00
113 lines
3.1 KiB
Go
113 lines
3.1 KiB
Go
/*
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Copyright (c) 2020 Docker Inc.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED,
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INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH
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THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package config
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import (
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"context"
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"encoding/json"
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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"github.com/docker/api/context/store"
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)
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type dirKey struct{}
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// WithDir sets the config directory path in the context
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func WithDir(ctx context.Context, path string) context.Context {
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return context.WithValue(ctx, dirKey{}, path)
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}
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// Dir returns the config directory path
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func Dir(ctx context.Context) string {
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cd, _ := ctx.Value(dirKey{}).(string)
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return cd
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}
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// LoadFile loads the docker configuration
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func LoadFile(dir string) (*File, error) {
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f := &File{}
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err := loadFile(configFilePath(dir), &f)
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if err != nil {
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return nil, err
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}
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return f, nil
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}
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// WriteCurrentContext writes the selected current context to the Docker
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// configuration file. Note, the validity of the context is not checked.
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func WriteCurrentContext(dir string, name string) error {
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m := map[string]interface{}{}
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path := configFilePath(dir)
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err := loadFile(path, &m)
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if err != nil {
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return err
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}
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// Match existing CLI behavior
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if name == store.DefaultContextName {
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delete(m, currentContextKey)
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} else {
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m[currentContextKey] = name
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}
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return writeFile(path, m)
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}
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func writeFile(path string, content map[string]interface{}) error {
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d, err := json.MarshalIndent(content, "", "\t")
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if err != nil {
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return errors.Wrap(err, "unable to marshal config")
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}
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err = ioutil.WriteFile(path, d, 0644)
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return errors.Wrap(err, "unable to write config file")
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}
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func loadFile(path string, dest interface{}) error {
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data, err := ioutil.ReadFile(path)
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if err != nil {
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if os.IsNotExist(err) {
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// Not an error if there is no config, we're just using defaults
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return nil
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}
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return errors.Wrap(err, "unable to read config file")
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}
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err = json.Unmarshal(data, dest)
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return errors.Wrap(err, "unable to unmarshal config")
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}
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func configFilePath(dir string) string {
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return filepath.Join(dir, ConfigFileName)
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}
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// File contains the current context from the docker configuration file
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type File struct {
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CurrentContext string `json:"currentContext,omitempty"`
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}
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