feature lower and upper case

cmd/lower.go

@@ -0,0 +1,29 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	lowerCmd = &cobra.Command{
+		Use:   "lower",
+		Short: "Convert to lower case",
+		Run: func(cmd *cobra.Command, args []string) {
+			Verbose(cmd)
+			data, err := ioutil.ReadAll(os.Stdin)
+			if err != nil {
+				panic(err)
+			}
+			fmt.Println(strings.ToLower(string(data)))
+		},
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(lowerCmd)
+}

cmd/upper.go

@@ -0,0 +1,29 @@
+package cmd
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	upperCmd = &cobra.Command{
+		Use:   "upper",
+		Short: "Convert to UPPER case",
+		Run: func(cmd *cobra.Command, args []string) {
+			Verbose(cmd)
+			data, err := ioutil.ReadAll(os.Stdin)
+			if err != nil {
+				panic(err)
+			}
+			fmt.Println(strings.ToUpper(string(data)))
+		},
+	}
+)
+
+func init() {
+	rootCmd.AddCommand(upperCmd)
+}