main.go


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package main

import (
	"bufio"
	"fmt"
	"os"
	"os/exec"
	"path"
	"strings"
)

func main() {
	r := bufio.NewReader(os.Stdin)
	paths := strings.Split(os.Getenv("PATH"), ":")

	for {
		found := false
		cmd, _ := r.ReadString('\n')
		args := strings.Split(strings.TrimSpace(cmd), " ")
		cmd = args[0]

		for i := range paths {
			if _, err := os.Stat(path.Join(paths[i], cmd)); err == nil {
				cmd = path.Join(paths[i], cmd)
				found = true
				break
			}
		}
		if found {
			c := exec.Command(cmd, args[1:]...)
			output, err := c.CombinedOutput()
			if err != nil {
				fmt.Fprintln(os.Stderr, err.Error())
				continue
			}
			fmt.Print(string(output))
		}
	}
}