feat: add cli flags

cli/main.go

@@ -2,9 +2,43 @@ package cli
 
 import (
 	"fmt"
+	"net/http"
 	"os"
+
+	npmproxy "github.com/emeralt/npm-cache-proxy/proxy"
+	"github.com/go-redis/redis"
 )
 
+// global options
+var persistentOptions struct {
+	RedisAddress  string
+	RedisDatabase int
+	RedisPassword string
+	RedisPrefix   string
+}
+
+// initialize global options
+func init() {
+	rootCmd.PersistentFlags().StringVar(&persistentOptions.RedisAddress, "redis-address", getEnvString("REDIS_ADDRESS", "localhost:6379"), "Redis address")
+	rootCmd.PersistentFlags().IntVar(&persistentOptions.RedisDatabase, "redis-database", getEnvInt("REDIS_DATABASE", "0"), "Redis database")
+	rootCmd.PersistentFlags().StringVar(&persistentOptions.RedisPassword, "redis-password", getEnvString("REDIS_PASSWORD", ""), "Redis password")
+	rootCmd.PersistentFlags().StringVar(&persistentOptions.RedisPrefix, "redis-prefix", getEnvString("REDIS_PREFIX", "ncp-"), "Redis prefix")
+}
+
+func getProxy(getOptions func() (npmproxy.Options, error)) *npmproxy.Proxy {
+	return &npmproxy.Proxy{
+		RedisClient: redis.NewClient(&redis.Options{
+			Addr:     persistentOptions.RedisAddress,
+			DB:       persistentOptions.RedisDatabase,
+			Password: persistentOptions.RedisPassword,
+		}),
+		HttpClient: &http.Client{
+			Transport: http.DefaultTransport,
+		},
+		GetOptions: getOptions,
+	}
+}
+
 // Run starts the CLI
 func Run() {
 	rootCmd.AddCommand(listCmd)