Bether input

command/echo/echo.go

@@ -8,5 +8,4 @@ import (
 
 func Echo(in input_parser.Input, _ *environment.Env) {
 	fmt.Print(in.Args_raw)
-	// fungerar inte om råttan åt din kod
 }

environment/environment.go

@@ -10,6 +10,9 @@ type Env struct {
 	Path string
 
 	Env map[string]string
+
+	// History where each command gets append to the end
+	History []string
 }
 
 func Get_env() Env {
@@ -17,14 +20,21 @@ func Get_env() Env {
 	if err != nil {
 		log.Fatal(err.Error())
 	}
+	return Env{
+		Path: pwd,
+		Env: inherit_environment(),
+		History: get_history(),
+	}
+}
+func inherit_environment() map[string] string{
 	env := make(map[string]string)
 	for _, s_env := range os.Environ() {
 		split := strings.Split(s_env, "=")
 		env[split[0]] = split[1]
 	}
-	return Env{
-		Path: pwd,
-		Env: env,
-	}
-
+	return env
+}
+func get_history() []string {
+	var x []string
+	return x
 }

go.mod

@@ -1,3 +1,8 @@
 module bbash
 
 go 1.23.4
+
+require (
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/term v0.28.0 // indirect
+)

go.sum

@@ -0,0 +1,4 @@
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.28.0 h1:/Ts8HFuMR2E6IP/jlo7QVLZHggjKQbhu/7H0LJFr3Gg=
+golang.org/x/term v0.28.0/go.mod h1:Sw/lC2IAUZ92udQNf3WodGtn4k/XoLyZoh8v/8uiwek=

input_parser/input_parser.go

@@ -1,10 +1,13 @@
 package input_parser
 
 import (
+	"bbash/environment"
 	"bufio"
-	"log"
+	"fmt"
 	"os"
 	"strings"
+
+	"golang.org/x/term"
 )
 
 type Input struct {
@@ -17,16 +20,21 @@ type Input struct {
 	Flags    []string
 }
 
-func Parse() Input {
-	input := input_str()
+func Parse(env *environment.Env) Input {
+	input := input_str(env)
 	return parse(input)
 }
 func parse(input string) Input {
 	split := strings.Split(string(input), " ")
 	instruction := strings.TrimSpace(split[0])
+
+	args_raw := ""
+	if len(split) > 1 {
+		args_raw = split[1]
+	}
+
 	var flags []string
 	var args []string
-
 	for _, arg := range split[1:] {
 		if len(arg) == 1 && arg[0] == '-' {
 			continue
@@ -49,13 +57,69 @@ func parse(input string) Input {
 		Instruction: instruction,
 		Args:        args,
 		Flags:       flags,
+		Args_raw:    args_raw,
 	}
 }
-func input_str() string {
-	reader := bufio.NewReader(os.Stdin)
-	input, err := reader.ReadString('\n')
+func input_str(env *environment.Env) string {
+	std_fd := os.Stdin.Fd()
+	term_restore, err := term.MakeRaw(int(std_fd))
 	if err != nil {
-		log.Fatal(err.Error())
+		fmt.Println(fmt.Sprintf("Error opening terminal: %s", err.Error()))
+		panic(err.Error())
 	}
+	reader := bufio.NewReader(os.Stdin)
+	var input string
+	history_index := len(env.History) // not -1 since we start at the new one
+	env.History = append(env.History, input)
+
+	env.History[len(env.History)-1] = input
+	fmt.Print("\r\033[K")
+	fmt.Print(env.Path)
+	fmt.Print(" > ")
+	fmt.Print(input)
+
+	for {
+		r_rune, _, err := reader.ReadRune()
+		if err != nil {
+			fmt.Print(fmt.Sprintf("Error reading user input: ", err.Error()))
+		}
+		switch r_rune {
+		case 3: // ^C
+			input = ""
+		case 4: // ^D
+			input = "exit"
+			goto loop_exit
+		case 65: // UPP
+			if history_index > 0 {
+				history_index--
+				input = env.History[history_index]
+			}
+		case 66: // DOWN
+			if history_index < len(env.History)-1 {
+				history_index++
+				input = env.History[history_index]
+			} else {
+				input = ""
+			}
+		case 67: // LEFT
+		case 68: // RIGHT
+		case 127: //packspace
+			if len(input) > 0 {
+				input = input[:len(input)-1]
+			}
+		case 13: // Enter
+			goto loop_exit
+		default:
+			input = input + string(r_rune)
+		}
+		env.History[len(env.History)-1] = input
+		fmt.Print("\r\033[K")
+		fmt.Print(env.Path)
+		fmt.Print(" > ")
+		fmt.Print(input)
+	}
+	loop_exit:
+	term.Restore(int(std_fd), term_restore)
+	fmt.Println()
 	return input
 }

input_parser/test_test.go

@@ -1,6 +1,7 @@
 package input_parser
 
 import (
+	"bbash/environment"
 	"fmt"
 	"testing"
 )
@@ -11,3 +12,9 @@ func TestParse(t *testing.T) {
 	fmt.Println(test.Args)
 	fmt.Println(test.Flags)
 }
+
+func TestInput(t *testing.T) {
+	
+	input := input_str(&environment.Env{})
+	fmt.Println(input)
+}

main.go

@@ -13,8 +13,10 @@ func main() {
 	command.Init(&env)
 
 	for {
-		fmt.Print(fmt.Sprintf("%s > ", env.Path))
-		in_parsed := input_parser.Parse()
+		in_parsed := input_parser.Parse(&env)
+		if in_parsed.Instruction == "exit" {
+			break
+		}
 		command.Run_command(in_parsed, &env)
 		fmt.Println()
 	}