import os
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import re
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import subprocess
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import hashlib
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def parse_requirements(requirements_file):
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"""
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Parse a requirements.txt file
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:param requirements_file: path to requirements.txt file
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:return: package names
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"""
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if os.path.exists(requirements_file):
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with open(requirements_file, 'r') as f:
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deps = list(filter(lambda x: len(x) > 0, map(str.strip, f.read().split('\n'))))
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return [re.split('==|<=|>=|<|>', d)[0] for d in deps]
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return []
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def requirements_installed(requirements_file, python_path):
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"""
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Checks if the packages in requirements.txt have been installed in the specified
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python path. Note that this does NOT check for versions, just package names
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:param requirements_file: path to requirements.txt
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:param python_path: path to directory where packages are installed
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:return: True if all requirements are installed, false otherwise
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"""
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env = os.environ.copy()
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env["PYTHONPATH"] = env.get("PYTHONPATH", "") + ":" + python_path
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reqs = subprocess.check_output(['python', '-m', 'pip', 'freeze'], env=env)
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installed_packages = [r.decode().split('==')[0] for r in reqs.split()]
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deps = parse_requirements(requirements_file)
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return set(deps) & set(installed_packages) == set(deps)
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def compute_file_md5(filename):
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return hashlib.md5(open(filename, 'rb').read()).hexdigest()
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