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