71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
#!/usr/bin/env python
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from __future__ import print_function
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import itertools
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import subprocess
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import sys
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def validate_pair(ob):
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if not (len(ob) == 2):
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print("Unexpected result:", ob, file=sys.stderr)
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return False
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else:
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return True
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def consume(iter):
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try:
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while True: next(iter)
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except StopIteration:
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pass
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def get_environment_from_batch_command(env_cmd, initial=None):
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"""
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Take a command (either a single command or list of arguments)
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and return the environment created after running that command.
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Note that if the command must be a batch file or .cmd file, or the
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changes to the environment will not be captured.
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If initial is supplied, it is used as the initial environment passed
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to the child process.
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"""
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if not isinstance(env_cmd, (list, tuple)):
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env_cmd = [env_cmd]
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# Construct the command that will alter the environment.
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env_cmd = subprocess.list2cmdline(env_cmd)
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# Create a tag so we can tell in the output when the proc is done.
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tag = 'END OF BATCH COMMAND'
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# Construct a cmd.exe command to do accomplish this.
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cmd = 'cmd.exe /s /c "{env_cmd} && echo "{tag}" && set"'.format(**vars())
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# Launch the process.
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proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, env=initial)
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# Parse the output sent to stdout.
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lines = proc.stdout
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# Consume whatever output occurs until the tag is reached.
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consume(itertools.takewhile(lambda l: tag not in l, lines))
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# Define a way to handle each KEY=VALUE line.
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handle_line = lambda l: l.rstrip().split('=',1)
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# Parse key/values into pairs.
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pairs = map(handle_line, lines)
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# Make sure the pairs are valid.
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valid_pairs = filter(validate_pair, pairs)
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# Construct a dictionary of the pairs.
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result = dict(valid_pairs)
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# Let the process finish.
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proc.communicate()
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return result
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def get_vs_env(vs_version, arch):
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"""
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Returns the env object for VS building environment.
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The vs_version can be strings like "2017", the arch has to
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be one of "x86", "amd64", "arm", "x86_amd64", "x86_arm", "amd64_x86",
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"amd64_arm", e.g. the args passed to vcvarsall.bat.
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"""
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vsvarsall = "C:\\Program Files (x86)\\Microsoft Visual Studio\\{0}\\Community\\VC\\Auxiliary\\Build\\vcvarsall.bat".format(vs_version)
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return get_environment_from_batch_command([vsvarsall, arch])
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