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config.go
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config.go
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/*
* Copyright (C) 2022 Appvia Ltd <info@appvia.io>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd
import (
"os"
"path/filepath"
"gopkg.in/yaml.v2"
"github.com/appvia/terranetes-controller/pkg/utils"
)
// ConfigPathEnvName is the name of the environment variable that holds the config path
const ConfigPathEnvName = "TNCTL_CONFIG"
type fileConfig struct {
path string
}
// NewFileConfiguration creates and returns a file configuration
func NewFileConfiguration(filename string) ConfigInterface {
return &fileConfig{path: filename}
}
// HasConfig returns if the configuration file exists
func (f *fileConfig) HasConfig() (bool, error) {
if exists, err := utils.FileExists(f.path); err != nil {
return false, err
} else if !exists {
return false, nil
}
return true, nil
}
// SaveConfig saves the configuration to the file
func (f *fileConfig) SaveConfig(config Config) error {
encoded, err := yaml.Marshal(&config)
if err != nil {
return err
}
// @step: ensure the directory exists
if err := os.MkdirAll(filepath.Dir(f.path), 0750); err != nil {
return err
}
//nolint:gosec
return os.WriteFile(f.path, encoded, 0640)
}
// GetConfig returns the configuration
func (f *fileConfig) GetConfig() (Config, error) {
config := Config{}
found, err := utils.FileExists(f.path)
if err != nil {
return config, err
}
if !found {
return config, nil
}
in, err := os.ReadFile(f.path)
if err != nil {
return config, err
}
if err := yaml.Unmarshal(in, &config); err != nil {
return config, err
}
return config, nil
}