33 lines
632 B
Go
33 lines
632 B
Go
package env
|
|
|
|
import (
|
|
"os"
|
|
"os/exec"
|
|
"regexp"
|
|
"runtime"
|
|
"strings"
|
|
)
|
|
|
|
func ExpandEnv(s string) string {
|
|
return expandEnvWithCmd(s)
|
|
}
|
|
|
|
func expandEnvWithCmd(s string) string {
|
|
re := regexp.MustCompile(`\$\(([^)]+)\)`)
|
|
expanded := re.ReplaceAllStringFunc(s, func(m string) string {
|
|
cmd := re.FindStringSubmatch(m)[1]
|
|
var out []byte
|
|
var err error
|
|
if runtime.GOOS == "windows" {
|
|
out, err = exec.Command("cmd", "/C", cmd).Output()
|
|
} else {
|
|
out, err = exec.Command("sh", "-c", cmd).Output()
|
|
}
|
|
if err != nil {
|
|
return ""
|
|
}
|
|
return strings.TrimSpace(string(out))
|
|
})
|
|
return os.Expand(expanded, os.Getenv)
|
|
}
|