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22 lines
649 B
22 lines
649 B
#!/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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