I’m stuck on stage: #YT5
The problem I have is the 2nd case isn’t even triggering, can you tell why and any tips on how to do it.
My code:
package main
import (
"bufio"
"fmt"
"os"
"os/exec"
"slices"
"strings"
)
var builtins = []string{"exit", "echo", "type", "pwd"}
func FindPath(val string, paths []string) (string, bool) {
for _, path := range paths {
file := path + "/" + val
if _, err := os.Stat(file); err == nil {
return file, true
}
}
return "", false
}
func RemoveQuotes(input string) (string, []string) {
var word string
var output string
var newArr []string
var quoteChar rune
if strings.Contains(input, "'") || strings.Contains(input, `"`) || strings.Contains(input, `\`) || strings.Contains(input, `/`) {
for i := 0; i < len(input); i++ {
ch := rune(input[i])
switch ch {
case '\'', '"':
if quoteChar == 0 {
quoteChar = ch
} else if quoteChar == ch {
if !(i+1 < len(input) && (input[i+1] == '\'' || input[i+1] == '"')) {
newArr = append(newArr, word)
word = ""
}
quoteChar = 0
} else {
word += string(ch)
}
case '\\', '/':
if i+1 < len(input) {
next := rune(input[i+1])
word += string(next)
i++
}
default:
if quoteChar != 0 {
word += string(ch)
}
}
}
if word != "" && quoteChar != 0 {
newArr = append(newArr, word)
}
singlesRemoved := strings.ReplaceAll(input, "'", "")
doublesRemoved := strings.ReplaceAll(singlesRemoved, `"`, "")
output = doublesRemoved
} else {
output = input
}
return output, newArr
}
func main() {
for {
fmt.Fprint(os.Stdout, "$ ")
paths := strings.Split(os.Getenv("PATH"), ":")
input, err := bufio.NewReader(os.Stdin).ReadString('\n')
if err != nil {
fmt.Fprintln(os.Stderr, "Error reading input: ", err)
os.Exit(1)
}
cmdArr := strings.Fields(input)
cmd := strings.TrimSpace(cmdArr[0])
var args []string
newInput, newArgsArr := RemoveQuotes(input)
if strings.Contains(input, "'") || strings.Contains(input, `"`) {
input = newInput
args = newArgsArr
} else if len(newArgsArr) == 0 {
args = cmdArr[1:]
} else {
args = cmdArr[1:]
}
if strings.TrimSpace(input) == "exit 0" {
break
}
switch cmd {
case "echo":
EchoCmd(args)
case "type":
TypeCmd(cmdArr, paths)
case "pwd":
Pwd()
case "cd":
Cd(args)
default:
filepath, exists := FindPath(cmd, paths)
if exists && filepath != "" {
CustomExeCmd(cmd, args)
} else {
fmt.Println(cmd + ": command not found")
}
}
}
}
func EchoCmd(args []string) {
output := strings.Join(args, " ")
fmt.Println(output)
}
func TypeCmd(cmdArr []string, paths []string) {
if len(cmdArr) == 1 {
return
}
value := cmdArr[1]
if slices.Contains(builtins, value) {
fmt.Println(value + " is a shell builtin")
return
}
if filePath, exists := FindPath(value, paths); exists {
fmt.Println(value + " is " + filePath)
return
}
fmt.Println(value + ": not found")
}
func CustomExeCmd(cmd string, args []string) {
exc := exec.Command(cmd, args...)
exc.Stdout = os.Stdout
exc.Stderr = os.Stderr
exc.Run()
}
func Pwd() {
dir, err := os.Getwd()
if err != nil {
return
}
fmt.Println(dir)
}
func Cd(args []string) {
path := strings.Join(args, "")
homepath := os.Getenv("HOME")
formatedPath := strings.ReplaceAll(path, "~", homepath)
err := os.Chdir(formatedPath)
if err != nil {
fmt.Println("cd: " + path + ": No such file or directory")
}
}
the specific function:
func RemoveQuotes(input string) (string, []string) {
var word string
var output string
var newArr []string
var quoteChar rune
if strings.Contains(input, "'") || strings.Contains(input, `"`) || strings.Contains(input, `\`) || strings.Contains(input, `/`) {
for i := 0; i < len(input); i++ {
ch := rune(input[i])
switch ch {
case '\'', '"':
if quoteChar == 0 {
quoteChar = ch
} else if quoteChar == ch {
if !(i+1 < len(input) && (input[i+1] == '\'' || input[i+1] == '"')) {
newArr = append(newArr, word)
word = ""
}
quoteChar = 0
} else {
word += string(ch)
}
case '\\', '/':
if i+1 < len(input) {
next := rune(input[i+1])
word += string(next)
i++
}
default:
if quoteChar != 0 {
word += string(ch)
}
}
}
if word != "" && quoteChar != 0 {
newArr = append(newArr, word)
}
singlesRemoved := strings.ReplaceAll(input, "'", "")
doublesRemoved := strings.ReplaceAll(singlesRemoved, `"`, "")
output = doublesRemoved
} else {
output = input
}
return output, newArr
}
Output:
lucifer@LUCIFER-1O1:~/codecrafters-shell-go$ go run app/main.go
$ echo world\ \ \ \ \ \ script
world\ \ \ \ \ \ script
$
