79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
/*
|
|
* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package env
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"github.com/goplus/llgo/xtool/safesplit"
|
|
)
|
|
|
|
var (
|
|
reSubcmd = regexp.MustCompile(`\$\([^)]+\)`)
|
|
reFlag = regexp.MustCompile(`[^ \t\n]+`)
|
|
)
|
|
|
|
func ExpandEnvToArgs(s string) []string {
|
|
r, config := expandEnvWithCmd(s)
|
|
if r == "" {
|
|
return nil
|
|
}
|
|
if config {
|
|
return safesplit.SplitPkgConfigFlags(r)
|
|
}
|
|
return []string{r}
|
|
}
|
|
|
|
func ExpandEnv(s string) string {
|
|
r, _ := expandEnvWithCmd(s)
|
|
return r
|
|
}
|
|
|
|
func expandEnvWithCmd(s string) (string, bool) {
|
|
var config bool
|
|
expanded := reSubcmd.ReplaceAllStringFunc(s, func(m string) string {
|
|
subcmd := strings.TrimSpace(m[2 : len(m)-1])
|
|
args := parseSubcmd(subcmd)
|
|
cmd := args[0]
|
|
if cmd != "pkg-config" && cmd != "llvm-config" {
|
|
fmt.Fprintf(os.Stderr, "expand cmd only support pkg-config and llvm-config: '%s'\n", subcmd)
|
|
return ""
|
|
}
|
|
config = true
|
|
|
|
var out []byte
|
|
var err error
|
|
out, err = exec.Command(cmd, args[1:]...).Output()
|
|
|
|
if err != nil {
|
|
// TODO(kindy): log in verbose mode
|
|
return ""
|
|
}
|
|
|
|
return strings.Replace(strings.TrimSpace(string(out)), "\n", " ", -1)
|
|
})
|
|
return strings.TrimSpace(os.Expand(expanded, os.Getenv)), config
|
|
}
|
|
|
|
func parseSubcmd(s string) []string {
|
|
return reFlag.FindAllString(s, -1)
|
|
}
|