format lines

cmd/pretty.go

@@ -1,7 +1,11 @@
 package cmd
 
 import (
+	"bufio"
 	"fmt"
+	"log"
+	"os"
+	"strings"
 
 	"github.com/spf13/cobra"
 )
@@ -14,6 +18,24 @@ var prettyCmd = &cobra.Command {
   Use: "pretty",
   Run: func(cmd *cobra.Command, args []string) {
     var filename = args[0]
-    fmt.Printf("Run the pretty command with filename %s", filename)
+    f, err := os.Open(filename)
+    if err != nil {
+      log.Fatal(err)
+    }
+
+    defer f.Close()
+
+    scanner := bufio.NewScanner(f)
+
+    for scanner.Scan() {
+      line := scanner.Text()
+      formattedLine := strings.Replace(line, "\\n", "\n", -1)
+      formattedLine = strings.Replace(formattedLine, "\\t", "\t", -1)
+      fmt.Printf(formattedLine)
+    }
+
+    if err := scanner.Err(); err != nil {
+      log.Fatal(err)
+    }
   },
 }