Question

我可以在终端中将bash脚本（没有shebang）轻松地作为bash命令来源但是尝试通过python命令执行相同的操作

sourcevars = "cd /etc/openvpn/easy-rsa && . ./vars"
runSourcevars = subprocess.Popen(sourcevars, shell = True)

或

sourcevars = [". /etc/openvpn/easy-rsa/vars"]
runSourcevars = subprocess.Popen(sourcevars, shell = True)

我收到：

请首先获取vars脚本（即“source ./vars”）确保您已对其进行了编辑以反映您的配置。

问题是什么，如何正确地做到这一点？我在这里阅读了一些主题，例如here，但无法使用给定的建议解决我的问题。请用例子说明。

更新：

# os.chdir = ('/etc/openvpn/easy-rsa')
initvars = "cd /etc/openvpn/easy-rsa && . ./vars && ./easy-rsa ..."


# initvars = "cd /etc/openvpn/easy-rsa && . ./vars"
# initvars = [". /etc/openvpn/easy-rsa/vars"]
cleanall = ["/etc/openvpn/easy-rsa/clean-all"]
# buildca  = ["printf '\n\n\n\n\n\n\n\n\n' | /etc/openvpn/easy-rsa/build-ca"]
# buildkey = ["printf '\n\n\n\n\n\n\n\n\n\nyes\n ' | /etc/openvpn/easy-rsa/build-key AAAAAA"]
# buildca  = "cd /etc/openvpn/easy-rsa && printf '\n\n\n\n\n\n\n\n\n' | ./build-ca"
runInitvars = subprocess.Popen(cmd, shell = True)
# runInitvars = subprocess.Popen(initvars,stdout=subprocess.PIPE, shell = True, executable="/bin/bash")
runCleanall = subprocess.Popen(cleanall , shell=True)

# runBuildca = subprocess.Popen(buildca , shell=True)
# runBuildca.communicate()
# runBuildKey = subprocess.Popen(buildkey, shell=True )

更新2

buildca  = ["printf '\n\n\n\n\n\n\n\n\n' | /etc/openvpn/easy-rsa/build-ca"]
runcommands = subprocess.Popen(initvars+cleanall+buildca, shell = True)

Answer 1

这本身并没有任何问题：

# What you're already doing -- this is actually fine!
sourcevars = "cd /etc/openvpn/easy-rsa && . ./vars"
runSourcevars = subprocess.Popen(sourcevars, shell=True)

# ...*however*, it won't have any effect at all on this:
runOther = subprocess.Popen('./easy-rsa build-key yadda yadda', shell=True)

但是，如果后来尝试运行第二个subprocess.Popen(..., shell=True)命令，您将看到它没有通过获取该配置设置的任何变量。

这是完全正常的预期行为：使用source的整个过程就是修改活动shell的状态;每次使用Popen创建一个新的shell=True对象时，它都会启动一个新shell - 它们的状态不会被转移。

因此，合并为一个电话：

prefix = "cd /etc/openvpn/easy-rsa && . ./vars && "
cmd = "/etc/openvpn/easy-rsa/clean-all"
runCmd = subprocess.Popen(prefix + cmd, shell=True)

...这样您就可以在与实际源脚本相同的shell调用中使用脚本来获取结果。

或者（这就是我要做的），要求你的Python脚本由一个已经在其环境中拥有必要变量的shell调用。因此：

# ask your users to do this
set -a; . ./vars; ./yourPythonScript

...如果人们不这么做，你就会出错：

import os, sys
if not 'EASY_RSA' in os.environ:
    print >>sys.stderr, "ERROR: Source vars before running this script"
    sys.exit(1)

如何通过python源脚本

1 个答案: