49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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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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