Created
August 18, 2019 08:57
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package main | |
import ( | |
"bufio" | |
"errors" | |
"fmt" | |
"os" | |
"os/exec" | |
"strings" | |
) | |
const prompt = "$ " | |
var ( | |
noPathError = errors.New("path required.") | |
) | |
func main() { | |
scanner := bufio.NewScanner(os.Stdin) | |
fmt.Print(prompt) | |
for scanner.Scan() { | |
fmt.Print(prompt) | |
input := scanner.Text() | |
if input == "" { | |
continue | |
} | |
args := strings.Split(input, " ") | |
command := args[0] | |
args = args[1:] | |
switch command { | |
case "cd": | |
if len(args) == 0 { | |
panic(noPathError) | |
} | |
os.Chdir(args[0]) | |
case "exit": | |
os.Exit(0) | |
default: | |
cmd := exec.Command(command, args...) | |
cmd.Stderr = os.Stderr | |
cmd.Stdout = os.Stdout | |
cmd.Run() | |
} | |
} | |
} |
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