将 SConstruct 移植到 Python 3

本文介绍了将 SConstruct 移植到 Python 3的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

2020 年使 SConstruct Python 3 兼容的最佳实践是什么?

What is the best practice in 2020 to make SConstruct Python 3 compatible?

例如，运行旧的 SConstruct 会出现这样的错误.

For example, running old SConstruct gives errors like this.

✗ python ~/scons/scripts/scons.py scons: Reading SConscript files ... File "/home/techtonik/Folding@home/fah-control/SConstruct", line 17 except Exception, e: ^ SyntaxError: invalid syntax

推荐答案

2to3 或 modernize 应该会有所帮助.这只是 Python 语法的问题.

2to3 or modernize ought to help. it's just Python syntax that's at issue.

2to3 随 Python 一起提供，也可以作为 Python 模块执行:

2to3 is shipped with Python, and can also be executed as a Python module:

python -m lib2to3 -w SConstruct

这是建议的补丁 2to3，看起来很小:

Here's the patch 2to3 suggested, looks pretty minor:

RefactoringTool: Refactored SConstruct --- SConstruct (original) +++ SConstruct (refactored) @@ -3,8 +3,8 @@ env = Environment(ENV = os.environ) try: env.Tool('config', toolpath = [os.environ.get('CBANG_HOME')]) -except Exception, e: - raise Exception, 'CBANG_HOME not set?\n' + str(e) +except Exception as e: + raise Exception('CBANG_HOME not set?\n' + str(e)) env.CBLoadTools('packager run_distutils osx fah-client-version') env.CBAddVariables( @@ -14,7 +14,7 @@ # Version try: version = env.FAHClientVersion() -except Exception, e: +except Exception as e: print(e) version = '0.0.0' env.Replace(PACKAGE_VERSION = version) RefactoringTool: Files that need to be modified: RefactoringTool: SConstruct