outsource preRun and run func

main.go

@@ -23,13 +23,59 @@ func main() {
 		Version: version,
 	}
 
-	config := &Config{}
-
 	var dumpCmd = &cobra.Command{
 		Use:     "dump",
 		Short:   "Dump Let's Encrypt certificates from Traefik",
 		Long:    `Dump ACME data from Traefik of different storage backends to certificates.`,
-		PreRunE: func(cmd *cobra.Command, args []string) error {
+		PreRunE: commandPreRun,
+		RunE:    commandRun,
+	}
+
+	dumpCmd.Flags().String("source", "file", "Source type, one of 'file', 'consul', 'etcd', 'zookeeper', 'boltdb'. Options for each source type are prefixed with `source.<type>.`")
+	dumpCmd.Flags().String("source.file", "./acme.json", "Path to 'acme.json' for file source.")
+
+	// Generic parameters for Key/Value backends
+	dumpCmd.Flags().String("source.kv.endpoints", "localhost:8500", "Comma seperated list of endpoints.")
+	dumpCmd.Flags().Int("source.kv.connection-timeout", 0, "Connection timeout in seconds.")
+	dumpCmd.Flags().String("source.kv.password", "", "Password for connection.")
+	dumpCmd.Flags().String("source.kv.username", "", "Username for connection.")
+	dumpCmd.Flags().Bool("source.kv.tls.enable", false, "Enable TLS encryption.")
+	dumpCmd.Flags().Bool("source.kv.tls.insecureskipverify", false, "Trust unverified certificates if TLS is enabled.")
+	dumpCmd.Flags().String("source.kv.tls.ca-cert-file", "", "Root CA file for certificate verification if TLS is enabled.")
+	// Special parameters for etcd
+	dumpCmd.Flags().Int("source.kv.etcd.sync-period", 0, "Sync period for etcd in seconds.")
+	// Special parameters for boltdb
+	dumpCmd.Flags().Bool("source.kv.boltdb.persist-connection", false, "Persist connection for boltdb.")
+	dumpCmd.Flags().String("source.kv.boltdb.bucket", "traefik", "Bucket for boltdb.")
+	// Special parameters for consul
+	dumpCmd.Flags().String("source.kv.consul.token", "", "Token for consul.")
+
+	dumpCmd.Flags().Bool("watch", false, "Enable watching changes.")
+	dumpCmd.Flags().String("dest", "./dump", "Path to store the dump content.")
+	dumpCmd.Flags().String("crt-ext", ".crt", "The file extension of the generated certificates.")
+	dumpCmd.Flags().String("crt-name", "certificate", "The file name (without extension) of the generated certificates.")
+	dumpCmd.Flags().String("key-ext", ".key", "The file extension of the generated private keys.")
+	dumpCmd.Flags().String("key-name", "privatekey", "The file name (without extension) of the generated private keys.")
+	dumpCmd.Flags().Bool("domain-subdir", false, "Use domain as sub-directory.")
+	rootCmd.AddCommand(dumpCmd)
+
+	var versionCmd = &cobra.Command{
+		Use:   "version",
+		Short: "Display version",
+		Run: func(_ *cobra.Command, _ []string) {
+			displayVersion(rootCmd.Name())
+		},
+	}
+
+	rootCmd.AddCommand(versionCmd)
+
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+}
+
+func commandPreRun(cmd *cobra.Command, args []string) error {
 	source := cmd.Flag("source").Value.String()
 	sourceFile := cmd.Flag("source.file").Value.String()
 	watch, _ := strconv.ParseBool(cmd.Flag("watch").Value.String())
@@ -61,8 +107,11 @@ func main() {
 	}
 
 	return nil
-		},
+}
-		RunE: func(cmd *cobra.Command, _ []string) error {
+
+func commandRun(cmd *cobra.Command, _ []string) error {
+
+	config := &Config{}
 
 	source := cmd.Flag("source").Value.String()
 	acmeFile := cmd.Flag("source.file").Value.String()
@@ -150,49 +199,4 @@ func main() {
 	}
 
 	return nil
-		},
-	}
-
-	dumpCmd.Flags().String("source", "file", "Source type, one of 'file', 'consul', 'etcd', 'zookeeper', 'boltdb'. Options for each source type are prefixed with `source.<type>.`")
-	dumpCmd.Flags().String("source.file", "./acme.json", "Path to 'acme.json' for file source.")
-
-	// Generic parameters for Key/Value backends
-	dumpCmd.Flags().String("source.kv.endpoints", "localhost:8500", "Comma seperated list of endpoints.")
-	dumpCmd.Flags().Int("source.kv.connection-timeout", 0, "Connection timeout in seconds.")
-	dumpCmd.Flags().String("source.kv.password", "", "Password for connection.")
-	dumpCmd.Flags().String("source.kv.username", "", "Username for connection.")
-	dumpCmd.Flags().Bool("source.kv.tls.enable", false, "Enable TLS encryption.")
-	dumpCmd.Flags().Bool("source.kv.tls.insecureskipverify", false, "Trust unverified certificates if TLS is enabled.")
-	dumpCmd.Flags().String("source.kv.tls.ca-cert-file", "", "Root CA file for certificate verification if TLS is enabled.")
-	// Special parameters for etcd
-	dumpCmd.Flags().Int("source.kv.etcd.sync-period", 0, "Sync period for etcd in seconds.")
-	// Special parameters for boltdb
-	dumpCmd.Flags().Bool("source.kv.boltdb.persist-connection", false, "Persist connection for boltdb.")
-	dumpCmd.Flags().String("source.kv.boltdb.bucket", "traefik", "Bucket for boltdb.")
-	// Special parameters for consul
-	dumpCmd.Flags().String("source.kv.consul.token", "", "Token for consul.")
-
-	dumpCmd.Flags().Bool("watch", false, "Enable watching changes.")
-	dumpCmd.Flags().String("dest", "./dump", "Path to store the dump content.")
-	dumpCmd.Flags().String("crt-ext", ".crt", "The file extension of the generated certificates.")
-	dumpCmd.Flags().String("crt-name", "certificate", "The file name (without extension) of the generated certificates.")
-	dumpCmd.Flags().String("key-ext", ".key", "The file extension of the generated private keys.")
-	dumpCmd.Flags().String("key-name", "privatekey", "The file name (without extension) of the generated private keys.")
-	dumpCmd.Flags().Bool("domain-subdir", false, "Use domain as sub-directory.")
-	rootCmd.AddCommand(dumpCmd)
-
-	var versionCmd = &cobra.Command{
-		Use:   "version",
-		Short: "Display version",
-		Run: func(_ *cobra.Command, _ []string) {
-			displayVersion(rootCmd.Name())
-		},
-	}
-
-	rootCmd.AddCommand(versionCmd)
-
-	if err := rootCmd.Execute(); err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
 }