Config Tweaks

Using viper for config management.  Added configuration endpoint.

pkg/manager/config/config.go

@@ -0,0 +1,47 @@
+package config
+
+import (
+	"github.com/spf13/viper"
+)
+
+const Stash = "stash"
+const Cache = "cache"
+const Generated = "generated"
+const Metadata = "metadata"
+const Downloads = "downloads"
+
+const Database = "database"
+
+func Set(key string, value interface{}) {
+	viper.Set(key, value)
+}
+
+func Write() error {
+	return viper.WriteConfig()
+}
+
+func GetStashPaths() []string {
+	return viper.GetStringSlice(Stash)
+}
+
+func GetCachePath() string {
+	return viper.GetString(Cache)
+}
+
+func GetGeneratedPath() string {
+	return viper.GetString(Generated)
+}
+
+func GetMetadataPath() string {
+	return viper.GetString(Metadata)
+}
+
+func GetDatabasePath() string {
+	return viper.GetString(Database)
+}
+
+func IsValid() bool {
+	setPaths := viper.IsSet(Stash) && viper.IsSet(Cache) && viper.IsSet(Generated) && viper.IsSet(Metadata)
+	// TODO: check valid paths
+	return setPaths
+}