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package core
import (
"fmt"
"os"
"os/exec"
"os/user"
"path/filepath"
"strings"
"time"
)
const (
defaultTrimSet = "\r\n\t "
)
// Trim remove trailing spaces from a string.
func Trim(s string) string {
return strings.Trim(s, defaultTrimSet)
}
// Exec spawns a new process and reurns the output.
func Exec(executable string, args []string) (string, error) {
path, err := exec.LookPath(executable)
if err != nil {
return "", err
}
raw, err := exec.Command(path, args...).CombinedOutput()
if err != nil {
return "", err
}
return Trim(string(raw)), nil
}
// Exists checks if a path exists.
func Exists(path string) bool {
if _, err := os.Stat(path); os.IsNotExist(err) {
return false
}
return true
}
// ExpandPath replaces '~' shorthand with the user's home directory.
func ExpandPath(path string) (string, error) {
// Check if path is empty
if path != "" {
if strings.HasPrefix(path, "~") {
usr, err := user.Current()
if err != nil {
return "", err
}
// Replace only the first occurrence of ~
path = strings.Replace(path, "~", usr.HomeDir, 1)
}
return filepath.Abs(path)
}
return "", nil
}
// GetFileModTime checks if a file has been modified.
func GetFileModTime(filepath string) (time.Time, error) {
fi, err := os.Stat(filepath)
if err != nil || fi.IsDir() {
return time.Now(), fmt.Errorf("GetFileModTime() Invalid file")
}
return fi.ModTime(), nil
}
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