cmptest: regexdemo (todo)

_cmptest/_regexdemo/regex.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/goplus/llgo/xtool/env"
+)
+
+func main() {
+	fmt.Println(env.ExpandEnv("$(pkg-config --libs bdw-gc)"))
+}

cmd/internal/version/version.go

@@ -21,7 +21,7 @@ import (
 	"runtime"
 
 	"github.com/goplus/llgo/cmd/internal/base"
-	"github.com/goplus/llgo/xtool/env"
+	"github.com/goplus/llgo/x/env"
 )
 
 // llgo version

xtool/env/env.go

@@ -36,11 +36,8 @@ func ExpandEnv(s string) string {
 func expandEnvWithCmd(s string) string {
 	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 ""