build: separate compiler and libs

compiler/internal/env/env.go

@@ -0,0 +1,58 @@
+package env
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const (
+	LLGoCompilerPkg = "github.com/goplus/llgo"
+)
+
+func LLGoROOT() string {
+	if root, ok := isLLGoRoot(os.Getenv("LLGO_ROOT")); ok {
+		return root
+	}
+	// Get executable path
+	exe, err := os.Executable()
+	if err != nil {
+		return ""
+	}
+	// Resolve any symlinks
+	exe, err = filepath.EvalSymlinks(exe)
+	if err != nil {
+		return ""
+	}
+	// Check if parent directory is bin
+	dir := filepath.Dir(exe)
+	if filepath.Base(dir) != "bin" {
+		return ""
+	}
+	// Get parent directory of bin
+	root := filepath.Dir(dir)
+	if root, ok := isLLGoRoot(root); ok {
+		return root
+	}
+	return ""
+}
+
+func isLLGoRoot(root string) (string, bool) {
+	if root == "" {
+		return "", false
+	}
+	root, err := filepath.Abs(root)
+	if err != nil {
+		return "", false
+	}
+	// Check for go.mod
+	data, err := os.ReadFile(filepath.Join(root, "go.mod"))
+	if err != nil {
+		return "", false
+	}
+	// Check module name
+	if !strings.Contains(string(data), "module "+LLGoCompilerPkg+"\n") {
+		return "", false
+	}
+	return root, true
+}