[Scons-users] tool located in site_scons\site_tools\toolname causes ImportError

[Bill Deegan]

Let me see if I can reproduce it here.
Also curious if it affects py3.5, py3.6 and non-windows platforms.

Looks like you have a workaround so you're not stuck (for the moment).
-Bill
SCons Project Co-manager.

On Fri, Feb 1, 2019 at 4:21 AM Arndt Pauschardt <arndt.pauschardt at web.de>
wrote:

> Hi, *
> this is my 1st mail to this list, so pls let me know any 'code-of-conduct'
> violations ... :-)
>
> 1. I have installed WinPython 3.7.10 on a Win7 64bit machine and
> pip-installed scons into this:
>
> E:\rfs_projects\test>python -VV
> Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit
> (AMD64)]
> E:\rfs_projects\test>scons --version
> SCons by Steven Knight et al.:
>         script: v3.0.4.3a41ed6b288cee8d085373ad7fa02894e1903864,
> 2019-01-20 22:51:36, by bdeegan on kufra
>         engine: v3.0.4.3a41ed6b288cee8d085373ad7fa02894e1903864,
> 2019-01-20 22:51:36, by bdeegan on kufra
>         engine path:
> ['e:\\wpy-3710\\python-3.7.1.amd64\\lib\\site-packages\\scons\\SCons']
> Copyright (c) 2001 - 2019 The SCons Foundation
>
>
> 2. I'm running the following SConstruct
>
> env = Environment()
> env.Tool('astyle')
>
> 2.1 in site_scons\site_tools\astyle I have an __init__.py and an astyle.py:
> __init__.py:
> from astyle import generate
> from astyle import exists
>
> astyle.py :
> import os
> from SCons.Script import *
> def generate(env, **kw):
>     astyle_path = os.path.join(kw.get('TOOL_DIR', ''), 'AStyle')
>     env.PrependENVPath('PATH', astyle_path)
>     ASTYLECOM='astyle --verbose '
>     env['ASTYLE_OPTS'] = kw.get('OPTS')
>     import SCons.Builder
>     # cmd line options, taken from the docu for your convenience
>     # --ascii               output is ascii chars (and not localized or
> whatever), output is English
>     astyle_bld = SCons.Builder.Builder(action=['@echo formatting $SOURCE',
>                                                ASTYLECOM+
>                                                '--options=$ASTYLE_OPTS '
>                                                '--ascii '
>                                                '$SOURCE > $TARGET'
>                                                ],
>                                        suffix='.astyle'
>                                        )
>     env.Append(BUILDERS={'astyle_C': astyle_bld})
>     return
> def exists(env):
>     return 0
>
>
> 3. Running this (e.g. scons -h) causes an ImportError:
> E:\rfs_projects\test>scons -h
> scons: Reading SConscript files ...
> ImportError: cannot import name 'generate' from 'astyle'
> (E:\rfs_projects\test\site_scons\site_tools\astyle\__init__.py):
>   File "E:\rfs_projects\test\SConstruct", line 2:
>     env = Environment(tools = ['astyle'])
>   File
> "e:\wpy-3710\python-3.7.1.amd64\lib\site-packages\scons\SCons\Environment.py",
> line 982:
>     apply_tools(self, tools, toolpath)
>   File
> "e:\wpy-3710\python-3.7.1.amd64\lib\site-packages\scons\SCons\Environment.py",
> line 107:
>     env.Tool(tool)
>   File
> "e:\wpy-3710\python-3.7.1.amd64\lib\site-packages\scons\SCons\Environment.py",
> line 1788:
>     tool = SCons.Tool.Tool(tool, toolpath, **kw)
>   File
> "e:\wpy-3710\python-3.7.1.amd64\lib\site-packages\scons\SCons\Tool\__init__.py",
> line 117:
>     module = self._tool_module()
>   File
> "e:\wpy-3710\python-3.7.1.amd64\lib\site-packages\scons\SCons\Tool\__init__.py",
> line 232:
>     module = spec.loader.load_module(spec.name)
>   File "<frozen importlib._bootstrap_external>", line 407:
>   File "<frozen importlib._bootstrap_external>", line 907:
>   File "<frozen importlib._bootstrap_external>", line 732:
>   File "<frozen importlib._bootstrap>", line 265:
>   File "<frozen importlib._bootstrap>", line 696:
>   File "<frozen importlib._bootstrap>", line 677:
>   File "<frozen importlib._bootstrap_external>", line 728:
>   File "<frozen importlib._bootstrap>", line 219:
>   File "E:\rfs_projects\test\site_scons\site_tools\astyle\__init__.py",
> line 1:
>     from astyle import generate
>
>
> 4. Running the exact same SConstruct (and site_scons\..) from a
> WinPy2.7.13 (with pip'ed scons 3.0.4) does not cause a problem.
> 5. Renaming site_scons\site_tools\astyle to astyle_1 (to take it out) and
> moving astyle.py into site_scons\ fixes the issue for the WinPython 3.7.
>
> I'm not sure what I'm doing wrong, I have been trying to google-read on
> this "ImportError", but I did not find anything which seems to explain this.
>
> Thx for any help on this
> Arndt
>
>
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