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reader.go
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/
reader.go
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/*
* Copyright 2020 The Knative 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 (
"github.com/mitchellh/go-homedir"
"github.com/pelletier/go-toml"
"github.com/wavesoftware/go-ensure"
"os"
)
var location = "~/.config/wathola/config.toml"
var logFatal = Log.Fatal
// ReadIfPresent read a configuration file if it exists
func ReadIfPresent() {
configFile, err := homedir.Expand(location)
ensure.NoError(err)
if fileExists(configFile) {
Log.Infof("Reading config file: %v", configFile)
err := Read(configFile)
if err != nil {
logFatal(err)
}
} else {
Log.Infof("Define config file to be taken into account: %v", configFile)
}
}
// Read a config file and update configuration object
func Read(configFile string) error {
r, err := os.Open(configFile)
if err != nil {
return err
}
d := toml.NewDecoder(r)
err = d.Decode(Instance)
if err == nil {
logConfig.Level.SetLevel(Instance.LogLevel)
}
return err
}
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}