HarmonyOS鸿蒙Next中构建Hi3861时报错ImportError: cannot import name 'common_env' from 'scripts' 解决方案

HarmonyOS鸿蒙Next中构建Hi3861时报错ImportError: cannot import name ‘common_env’ from ‘scripts’ 解决方案 今天刚刚下载了Hi3861的代码code1.0，按照环境要求配置好，然后执行构建的时候报错：

Traceback (most recent call last):
  File "/home/peter/.local/lib/python3.7/site-packages/SCons/Script/Main.py", line 1391, in main
    _exec_main(parser, values)
  File "/home/peter/.local/lib/python3.7/site-packages/SCons/Script/Main.py", line 1355, in _exec_main
    _main(parser)
  File "/home/peter/.local/lib/python3.7/site-packages/SCons/Script/Main.py", line 1029, in _main
    SCons.Script._SConscript._SConscript(fs, script)
  File "/home/peter/.local/lib/python3.7/site-packages/SCons/Script/SConscript.py", line 287, in _SConscript
    exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "/home/peter/work/HarmonyOS/code/vendor/hisi/hi3861/hi3861/SConstruct", line 31, in <module>
    from scripts import common_env
ImportError: cannot import name 'common_env' from 'scripts' (/root/anaconda3/lib/python3.7/site-packages/scripts/__init__.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/peter/.local/bin/scons", line 8, in <module>
    sys.exit(main())
  File "/home/peter/.local/lib/python3.7/site-packages/SCons/Script/Main.py", line 1416, in main
    SCons.Script._SConscript.SConscript_exception()
  File "/home/peter/.local/lib/python3.7/site-packages/SCons/Script/SConscript.py", line 349, in SConscript_exception
    stack = traceback.extract_tb(tb)
  File "/root/anaconda3/lib/python3.7/traceback.py", line 72, in extract_tb
    return StackSummary.extract(walk_tb(tb), limit=limit)
  File "/root/anaconda3/lib/python3.7/traceback.py", line 363, in extract
    f.line
  File "/root/anaconda3/lib/python3.7/traceback.py", line 285, in line
    self._line = linecache.getline(self.filename, self.lineno).strip()
  File "/root/anaconda3/lib/python3.7/linecache.py", line 16, in getline
    lines = getlines(filename, module_globals)
  File "/root/anaconda3/lib/python3.7/linecache.py", line 47, in getlines
    return updatecache(filename, module_globals)
  File "/root/anaconda3/lib/python3.7/linecache.py", line 137, in updatecache
    lines = fp.readlines()
  File "/root/anaconda3/lib/python3.7/codecs.py", line 322, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xca in position 739: invalid continuation byte

打开构建脚本一看，原来是找不到commen_env.py模块，该Python文件放在code/vendor/hisi/hi3861/hi3861/build/scripts/目录下，构建脚本是vendor/hisi/hi3861/hi3861/SConstruct，打开发现问题：

sys.path.append(os.path.join(os.getcwd(), 'build'))
print('------------------', os.getcwd())
print(sys.path)
from scripts import common_env
from scripts import scons_utils
from scripts import scons_app

代码中已经把 build 目录添加到 sys 路径里面了，但是由于 scripts 目录太过常见，添加的路径太靠后，导致 Python 找到了错误的 scripts 文件夹（/root/anaconda3/lib/python3.7/site-packages/scripts），解决方法很简单：把 append 修改为 insert 即可：

sys.path.insert(0, os.path.join(os.getcwd(), 'build'))
print('------------------', os.getcwd())
print(sys.path)
from scripts import common_env
from scripts import scons_utils
from scripts import scons_app