Restructure the go package

pkg/config/config.go

@@ -0,0 +1,63 @@
+package config
+
+import (
+	"strings"
+
+	"github.com/sirupsen/logrus"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+)
+
+// Backend contains backend connection-specific configuration
+type Backend struct {
+	Addr    string            `mapstructure:"addr"`
+	Secured bool              `mapstructure:"secured"`
+	Headers map[string]string `mapstructure:"headers"`
+}
+
+// Content contains content-specific configuration
+type Content struct {
+	Backend      Backend `mapstructure:"backend"`
+	Key          string  `mapstructure:"key"`
+	Pinned       string  `mapstructure:"pinned"`
+	PostsPerPage int     `mapstructure:"postsPerPage"`
+}
+
+// Config contains application configuration
+type Config struct {
+	Verbose string  `mapstructure:"verbose"`
+	Base    string  `mapstructure:"base"`
+	Addr    string  `mapstructure:"addr"`
+	Unix    string  `mapstructure:"unix"`
+	Content Content `mapstructure:"content"`
+}
+
+// initialize default values on app-start
+func init() {
+
+	pflag.BoolP("version", "V", false, "get application version")
+	pflag.BoolP("verbose", "v", false, "enable verbose logging")
+	pflag.StringP("config", "c", string("frontend.yaml"), "config file path")
+
+	pflag.String("addr", "127.0.0.1:8000", "tcp addr to listen")
+	pflag.String("unix", "", "unix socket path to listen")
+	pflag.String("base", "", "http URI prefix")
+
+	pflag.StringToString("content.backend.headers", nil, "map of additional headers to send")
+	pflag.String("content.backend.addr", "demo.ghost.io:443", "ghost backend addr")
+	pflag.Bool("content.backend.secured", true, "is ghost backend secured")
+	pflag.String("content.key", "22444f78447824223cefc48062", "ghost content api key")
+	pflag.String("content.pinned", "contact", "pinned page slug")
+	pflag.Int("content.postsPerPage", 5, "amount of posts per page")
+
+	pflag.Parse()
+
+	viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
+	viper.AutomaticEnv()
+	viper.BindPFlags(pflag.CommandLine)
+
+	if viper.GetBool("verbose") {
+		logrus.SetLevel(logrus.DebugLevel)
+		logrus.Debug("Verbose mode")
+	}
+}