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23 lines
649 B
23 lines
649 B
3 years ago
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#!/usr/bin/env python3
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# Copyright (c) 2021 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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'''
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Common utility functions
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'''
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import shutil
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import sys
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import os
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from typing import List
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def determine_wellknown_cmd(envvar, progname) -> List[str]:
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maybe_env = os.getenv(envvar)
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maybe_which = shutil.which(progname)
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if maybe_env:
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return maybe_env.split(' ') # Well-known vars are often meant to be word-split
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elif maybe_which:
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return [ maybe_which ]
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else:
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sys.exit(f"{progname} not found")
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