helpers.go

package on_machine

import (
	"os"
	"os/exec"
)

// true if directory exists
func DirExists(path string) bool {
	stat, err := os.Stat(path)
	return err == nil && stat.IsDir()
}

// whether or not the user has a command on their $PATH
func commandExists(cmd string) bool {
	_, err := exec.LookPath(cmd)
	return err == nil
}

// path exists
func PathExists(path string) (bool, error) {
	_, err := os.Stat(path)
	if err == nil {
		return true, nil
	}
	if os.IsNotExist(err) {
		return false, nil
	}
	return false, err
}

// remove duplicates from a slice
func SliceUniqMap(s []string) []string {
	seen := make(map[string]struct{}, len(s))
	j := 0
	for _, v := range s {
		if _, ok := seen[v]; ok {
			continue
		}
		seen[v] = struct{}{}
		s[j] = v
		j++
	}
	return s[:j]
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}