first with full handle over rpm

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

config/config.go

@@ -0,0 +1,31 @@
+package config
+
+import "time"
+
+type Config struct {
+	Server  ServerConfig `mapstructure:"server"`
+	DB      DBConfig     `mapstructure:"db"`
+	DataDir string       `mapstructure:"data_dir"`
+	Sync    SyncConfig   `mapstructure:"sync"`
+}
+
+type ServerConfig struct {
+	Host string `mapstructure:"host"`
+	Port int    `mapstructure:"port"`
+}
+
+type DBConfig struct {
+	Path string `mapstructure:"path"`
+}
+
+type SyncConfig struct {
+	Interval string `mapstructure:"interval"`
+}
+
+func (s SyncConfig) IntervalDuration() time.Duration {
+	d, err := time.ParseDuration(s.Interval)
+	if err != nil || d <= 0 {
+		return time.Hour
+	}
+	return d
+}

config/loader.go

@@ -0,0 +1,41 @@
+package config
+
+import (
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+func Load(cfgFile string) (*Config, error) {
+	if cfgFile != "" {
+		viper.SetConfigFile(cfgFile)
+	} else {
+		viper.SetConfigName("clonepack")
+		viper.SetConfigType("yaml")
+		viper.AddConfigPath(".")
+		viper.AddConfigPath("$HOME/.clonepack")
+		viper.AddConfigPath("/etc/clonepack")
+	}
+
+	viper.SetEnvPrefix("CLONEPACK")
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+	viper.AutomaticEnv()
+
+	viper.SetDefault("server.host", "0.0.0.0")
+	viper.SetDefault("server.port", 8080)
+	viper.SetDefault("db.path", "./clonepack.db")
+	viper.SetDefault("data_dir", "./data")
+	viper.SetDefault("sync.interval", "1h")
+
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+			return nil, err
+		}
+	}
+
+	var cfg Config
+	if err := viper.Unmarshal(&cfg); err != nil {
+		return nil, err
+	}
+	return &cfg, nil
+}