setup.py 自定义命令中的相对路径“无法 cd 进入文件夹”答案

【问题标题】：Relative paths in setup.py custom commands 'cannot cd into folder'setup.py 自定义命令中的相对路径“无法 cd 进入文件夹”
【发布时间】：2017-07-03 17:51:46
【问题描述】：

我似乎无法破解如何在 setup.py 自定义命令中更改目录。我的python模块需要opencv，需要从源代码制作。

cmake 一切正常

  ['cmake','-Hopencv',"-Bopencv/build"],

...

-- Configuring done
-- Generating done
-- Build files have been written to: /root/DeepMeerkat/tests/prediction/opencv/build

接下来我只需 cd 进入构建文件夹并制作 -j4。但是 setup.py 拒绝查看该文件夹。我试过 cd opencv/build，我试过 /root/DeepMeerkat/tests/prediction/opencv/build

但我总是得到

Running command: ['cd', '/root/DeepMeerkat/tests/prediction/opencv/build']
error: [Errno 2] No such file or directory

这只是令人困惑。

目录肯定存在

root@60b6ab96357e:~/DeepMeerkat/tests/prediction# /root/DeepMeerkat/tests/prediction/opencv/build/
bash: /root/DeepMeerkat/tests/prediction/opencv/build/: Is a directory

据我所知，您需要从目标目录中创建一个 Makefile。

完整脚本：

import subprocess
from distutils.command.build import build as _build
import setuptools

class build(_build): 
  sub_commands = _build.sub_commands + [('CustomCommands', None)]

class CustomCommands(setuptools.Command):

  def initialize_options(self):
    pass

  def finalize_options(self):
    pass

  def RunCustomCommand(self, command_list):
    print('Running command: %s' % command_list)
    p = subprocess.Popen(
        command_list,
        stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
    stdout_data, _ = p.communicate()
    print('Command output: %s' % stdout_data)
    if p.returncode != 0:
      raise RuntimeError(
          'Command %s failed: exit code: %s' % (command_list, p.returncode))

  def run(self):
    for command in CUSTOM_COMMANDS:
      self.RunCustomCommand(command)

CUSTOM_COMMANDS = [

  #Get cmake and git
  ['apt-get', 'update', '-y'],  
  ['apt-get', 'install', '-y', 'cmake', 'git'],
  ['git','clone', 'https://github.com/Itseez/opencv.git', '--depth', '1'],
  ['git','clone', 'https://github.com/Itseez/opencv_contrib.git', '--depth', '1'],
  ['mkdir', 'opencv/build'],
  ['cmake','-Hopencv',"-Bopencv/build"],
  ['cd','/root/DeepMeerkat/tests/prediction/opencv/build'],
  ['make', '-j4'],
  ['make', 'install'], 
  ['ldconfig']]      

REQUIRED_PACKAGES = ['numpy']

setuptools.setup(
    name='DeepMeerkat',
    version='0.0.1',
    description='Running MotionMeerkat in the Cloud',
    install_requires=REQUIRED_PACKAGES,
    packages=setuptools.find_packages(),
    cmdclass={'build': build, 'CustomCommands': CustomCommands})

【问题讨论】：

只要make -C dir ...。

标签： python makefile cmake distutils

【解决方案1】：

每个子进程单独运行，所以当下一个子进程运行时，它会从用户的主目录开始。

试试：

cd somedir && some_command

或喜欢：

subprocess.Popen(
    command_list,
    stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, 
    cwd=working_dir)

【讨论】：