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config.go
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config.go
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/*
Copyright 2020 The Compose Specification 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 types
import (
"encoding/json"
"github.com/mitchellh/mapstructure"
)
// ConfigDetails are the details about a group of ConfigFiles
type ConfigDetails struct {
Version string
WorkingDir string
ConfigFiles []ConfigFile
Environment map[string]string
}
// LookupEnv provides a lookup function for environment variables
func (cd ConfigDetails) LookupEnv(key string) (string, bool) {
v, ok := cd.Environment[key]
return v, ok
}
// ConfigFile is a filename and the contents of the file as a Dict
type ConfigFile struct {
Filename string
Config map[string]interface{}
}
// Config is a full compose file configuration and model
type Config struct {
Filename string `yaml:"-" json:"-"`
Services Services `json:"services"`
Networks Networks `yaml:",omitempty" json:"networks,omitempty"`
Volumes Volumes `yaml:",omitempty" json:"volumes,omitempty"`
Secrets Secrets `yaml:",omitempty" json:"secrets,omitempty"`
Configs Configs `yaml:",omitempty" json:"configs,omitempty"`
Extensions Extensions `yaml:",inline" json:"-"`
}
// Volumes is a map of VolumeConfig
type Volumes map[string]*VolumeConfig
// Networks is a map of NetworkConfig
type Networks map[string]NetworkConfig
// Secrets is a map of SecretConfig
type Secrets map[string]SecretConfig
// Configs is a map of ConfigObjConfig
type Configs map[string]ConfigObjConfig
// Extensions is a map of custom extension
type Extensions map[string]interface{}
// MarshalJSON makes Config implement json.Marshaler
func (c Config) MarshalJSON() ([]byte, error) {
m := map[string]interface{}{
"services": c.Services,
}
if len(c.Networks) > 0 {
m["networks"] = c.Networks
}
if len(c.Volumes) > 0 {
m["volumes"] = c.Volumes
}
if len(c.Secrets) > 0 {
m["secrets"] = c.Secrets
}
if len(c.Configs) > 0 {
m["configs"] = c.Configs
}
for k, v := range c.Extensions {
m[k] = v
}
return json.Marshal(m)
}
func (e Extensions) Get(name string, target interface{}) (bool, error) {
if v, ok := e[name]; ok {
err := mapstructure.Decode(v, target)
return true, err
}
return false, nil
}