[tools] Add toolchain detection in sdk packages (#8827)

tools/env.py

@@ -0,0 +1,55 @@
+#! /usr/bin/env python
+#coding=utf-8
+#
+# Copyright (c) 2024, RT-Thread Development Team
+#
+# SPDX-License-Identifier: GPL-2.0
+#
+# Change Logs:
+# Date           Author       Notes
+# 2024-04-20     Bernard      the first version
+
+import os
+import json
+import platform
+
+def GetEnvPath():
+    env = os.environ.get('ENV_ROOT')
+
+    if env is None:
+        if platform.system() == 'Windows':
+            return os.path.join(os.environ['USERPROFILE'], '.env')
+        else:
+            return os.path.join(os.environ['HOME'], '.env')
+
+    return env
+
+def GetSDKPackage():
+    env = GetEnvPath()
+
+    if env:
+        return os.path.join(env, 'tools', 'packages')
+
+    return None
+
+def GetSDKPath(name):
+    env = GetEnvPath()
+
+    if env:
+        #read packages.json under env/tools/packages
+        with open(os.path.join(env, 'tools', 'packages', 'pkgs.json'), 'r', encoding='utf-8') as f:
+            # packages_json = f.read()
+            packages = json.load(f)
+
+            for item in packages:
+                package_path = os.path.join(GetEnvPath(), 'packages', item['path'], 'package.json')
+                # read package['path']/package.json under env/packages
+                with open(package_path, 'r', encoding='utf-8') as f:
+                    # package_json = f.read()
+                    package = json.load(f)
+
+                    if package['name'] == name:
+                        return os.path.join(GetSDKPackage(), package['name'] + '-' + item['ver'])
+
+    # not found named package
+    return None