command/command.go

@@ -12,7 +12,6 @@ import (
 	"bbash/command/mv"
 	"bbash/command/pwd"
 	"bbash/command/rm"
-	"bbash/command/tail"
 	"bbash/command/touch"
 	"bbash/environment"
 	"bbash/input_parser"
@@ -57,8 +56,6 @@ func Run_command(in input_parser.Input, env *environment.Env) {
 		mv.Mv(in, env)
 	case "help":
 		help.Help(in, env)
-	case "tail":
-		tail.Tail(in, env)
 	default:
 		if !run_by_path(in, env) {
 			fmt.Println(fmt.Sprintf("No such command! (%s)", in.Instruction))

command/man/man.go

@@ -8,31 +8,30 @@ import (
 
 func Man(in input_parser.Input, env *environment.Env) {
 	switch in.Args_raw {
-	case "pwd":
+		case "pwd":
-		fmt.Print("Output current working directory")
+			fmt.Print("Output current working directory")
-	case "echo":
+		case "echo":
-		fmt.Print("Echoes the input argument")
+			fmt.Print("Echoes the input argument")
-	case "ls":
+		case "ls":
-		fmt.Print("List Sources in the current working directory")
+			fmt.Print("List Sources in the current working directory")
-	case "cd":
+		case "cd":
-		fmt.Print("Change to directory given in the argument")
+			fmt.Print("Change to directory given in the argument")
-	case "man":
+		case "man":
-		fmt.Print("Manual for the terminal options")
+			fmt.Print("Manual for the terminal options")
-	case "cat":
+		case "cat":
-		fmt.Print("Outputs the contents of the given file")
+			fmt.Print("Outputs the contents of the given file")
-	case "head":
+		case "head":
-		fmt.Print("Outputs first lines of a given file. 10 if none provided. Argument <file> <number of lines>")
+			fmt.Print("Outputs first lines of a given file. 10 if non provided. Argument <file> <number of lines>")
-	case "touch":
+		case "touch":
-		fmt.Print("Creates the given file")
+			fmt.Print("Creates the given file")
-	case "rm":
+		case "rm":
-		fmt.Print("Removes the given file")
+			fmt.Print("Removes the given file")
-	case "cp":
+		case "cp":
-		fmt.Print("Copies the given file. Argument: <source> <destination>")
+			fmt.Print("Copies the given file. Argument: <source> <destination>")
-	case "mv":
+		case "mv":
-		fmt.Print("Moves a given file. Argument: <source> <destination>")
+			fmt.Print("Moves a given file. Argument: <source> <destination>")
-	case "tail":
+		default: fmt.Println(fmt.Sprintf("No such command! (%s)", in.Instruction))
-		fmt.Print("Outputs last lines of a given file. 10 if none or 0 is provided. Argument <file> <number of lines>")
-	default:
-		fmt.Println(fmt.Sprintf("No such command! (%s)", in.Instruction))
 	}
 }
+
+

command/tail/tail.go

@@ -1,84 +0,0 @@
-package tail
-
-import (
-	"bbash/environment"
-	"bbash/input_parser"
-	"bufio"
-	"bytes"
-	"fmt"
-	"io"
-	"os"
-	"strconv"
-	"strings"
-)
-
-func Tail(in input_parser.Input, env *environment.Env) {
-	args := in.Args
-	var file_path string
-	var lines int
-	if len(args) >= 1 {
-		file_path = strings.TrimSpace(args[0])
-	} else {
-		fmt.Print(fmt.Sprintf("No arguments provided"))
-		return
-	}
-	if len(args) == 2 {
-		lines1, err := strconv.Atoi(strings.TrimSpace(args[1]))
-		lines = lines1
-		if err != nil {
-			fmt.Print(fmt.Sprintf("Second argument must be a integer"))
-			return
-		}
-	}
-	file, err := os.Open(file_path)
-	if err != nil {
-		fmt.Println(fmt.Sprintf("Error opening file: %s", err.Error()))
-		return
-	}
-	defer file.Close()
-	size, err := CountLines(file)
-	file.Seek(0, io.SeekStart)
-	scanner := bufio.NewScanner(file)
-	if lines == 0 {
-		for i := 0; i < size; i++ {
-			if !scanner.Scan() {
-				return
-			}
-			if i >= (size - 10) {
-				fmt.Println(fmt.Sprintf(scanner.Text()))
-			}
-		}
-	} else {
-		for i := 0; i < size; i++ {
-			if !scanner.Scan() {
-				return
-			}
-			if i >= (size - lines) {
-				fmt.Println(fmt.Sprintf(scanner.Text()))
-			}
-		}
-	}
-}
-func CountLines(r io.Reader) (int, error) {
-	var count int
-	var read int
-	var err error
-	var target []byte = []byte("\n")
-
-	buffer := make([]byte, 32*1024)
-
-	for {
-		read, err = r.Read(buffer)
-		if err != nil {
-			break
-		}
-
-		count += bytes.Count(buffer[:read], target)
-	}
-
-	if err == io.EOF {
-		return count, nil
-	}
-
-	return count, err
-}

input_parser/input_parser.go

@@ -36,14 +36,8 @@ func parse(input string) Input {
 	var flags []string
 	var args []string
 	for _, arg := range split[1:] {
-		if len(arg) == 0 {
+		if len(arg) == 1 && arg[0] == '-' {
 			continue
-		} else if len(arg) == 1 {
-			if arg[0] == '-' {
-				continue
-			} else {
-				args = append(args, strings.TrimSpace(arg))
-			}
 		} else if arg[0:2] == "--" {
 			var result = strings.TrimSpace(arg)
 			flags = append(flags, string(result[2:]))
@@ -106,7 +100,7 @@ func input_str(env *environment.Env) string {
 				history_index++
 				input = env.History[history_index]
 			} else {
-				history_index = len(env.History) - 1
+				history_index = len(env.History)-1
 				input = ""
 			}
 		case 67: // LEFT
@@ -126,7 +120,7 @@ func input_str(env *environment.Env) string {
 		fmt.Print(" > ")
 		fmt.Print(input)
 	}
-loop_exit:
+	loop_exit:
 	term.Restore(int(std_fd), term_restore)
 	fmt.Println()
 	return input