Move parser to seperate function

cmd/root.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"bufio"
 	"fmt"
 	"os"
 	"time"
@@ -42,23 +41,7 @@ func init() {
 
 func runRootCommand(cmd *cobra.Command, args []string) error {
 	filename := args[0]
-	if stats, err := os.Stat(filename); err != nil || stats.IsDir() {
-		return err
-	}
-	file, err := os.Open(filename)
-	if err != nil {
-		return err
-	}
-	scanner := bufio.NewScanner(file)
-	scanner.Split(bufio.ScanLines)
-	var input []string
-	for scanner.Scan() {
-		input = append(input, scanner.Text())
-	}
-	if err := file.Close(); err != nil {
-		return err
-	}
-	program, err := parser.ParseProgram(input)
+	program, err := parser.ParseFile(filename)
 	if err != nil {
 		return err
 	}

parser/program_parser.go

@@ -1,13 +1,35 @@
 package parser
 
 import (
+	"bufio"
 	"fmt"
+	"os"
 	"strconv"
 	"strings"
 
 	"git.jfdev.de/JonasFranzDEV/hal/hal"
 )
 
+func ParseFile(filepath string) (hal.Program, error) {
+	if stats, err := os.Stat(filepath); err != nil || stats.IsDir() {
+		return nil, err
+	}
+	file, err := os.Open(filepath)
+	if err != nil {
+		return nil, err
+	}
+	scanner := bufio.NewScanner(file)
+	scanner.Split(bufio.ScanLines)
+	var input []string
+	for scanner.Scan() {
+		input = append(input, scanner.Text())
+	}
+	if err := file.Close(); err != nil {
+		return nil, err
+	}
+	return ParseProgram(input)
+}
+
 // ParseProgram parses an program by the following specification: LINE_NUMBER INSTRUCTION OPERAND(optional)
 func ParseProgram(input []string) (hal.Program, error) {
 	program := make(hal.Program)