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package app
import (
"os"
"path/filepath"
"runtime"
log "github.com/sirupsen/logrus"
"github.com/spf13/viper"
)
// Config type is the configuration entity of the application
type Config struct {
Mode string
Directories []string
}
// config file stuff
var (
configFileName = "config"
configFileExt = ".yml"
configType = "yaml"
appName = "gitbatch"
configurationDirectory = filepath.Join(osConfigDirectory(), appName)
configFileAbsPath = filepath.Join(configurationDirectory, configFileName)
)
// configuration items
var (
modeKey = "mode"
modeKeyDefault = "fetch"
pathsKey = "paths"
pathsKeyDefault = []string{"."}
)
// LoadConfiguration returns a Config struct is filled
func LoadConfiguration() (*Config, error) {
if err := initializeConfigurationManager(); err != nil {
return nil, err
}
if err := setDefaults(); err != nil {
return nil, err
}
if err := readConfiguration(); err != nil {
return nil, err
}
config := &Config{
Mode: viper.GetString(modeKey),
Directories: viper.GetStringSlice(pathsKey),
}
return config, nil
}
// set default configuration parameters
func setDefaults() error {
viper.SetDefault(modeKey, modeKeyDefault)
// viper.SetDefault(pathsKey, pathsKeyDefault)
return nil
}
// read configuration from file
func readConfiguration() error {
err := viper.ReadInConfig() // Find and read the config file
if err != nil { // Handle errors reading the config file
// if file does not exist, simply create one
if _, err := os.Stat(configFileAbsPath + configFileExt); os.IsNotExist(err) {
os.MkdirAll(configurationDirectory, 0755)
os.Create(configFileAbsPath + configFileExt)
} else {
return err
}
// let's write defaults
if err := viper.WriteConfig(); err != nil {
return err
}
}
return nil
}
// write configuration to a file
func writeConfiguration() error {
err := viper.WriteConfig()
return err
}
// initialize the configuration manager
func initializeConfigurationManager() error {
// config viper
viper.AddConfigPath(configurationDirectory)
viper.SetConfigName(configFileName)
viper.SetConfigType(configType)
return nil
}
// returns OS dependent config directory
func osConfigDirectory() (osConfigDirectory string) {
switch osname := runtime.GOOS; osname {
case "windows":
osConfigDirectory = os.Getenv("APPDATA")
case "darwin":
osConfigDirectory = os.Getenv("HOME") + "/Library/Application Support"
case "linux":
osConfigDirectory = os.Getenv("HOME") + "/.config"
default:
log.Warn("Operating system couldn't be recognized")
}
return osConfigDirectory
}
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