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nodejs/configure
Richard Lau 16982b6c4d
build: remove dependency on distutils.spawn
Debian based packages of Python 3 do not include `distutils.spawn` and
require an additional apt package to be installed (`python3-distutils`).
Replace use of `distutils.spawn` with `shutil.which`, available in all
versions of Python currently allowed by our configure scripts.

For the `configure` script only, fall back to `distutils.spawn` to allow
friendlier error messages when run on older unsupported versions of
Python (e.g. 2.7).

`configure.py` also uses `distutils.version` -- this appears to be
available in Debian packaged Python 3 without installing
`python3-distutils` so has been left as-is.

PR-URL: https://github.com/nodejs/node/pull/38600
Refs: https://github.com/nodejs/node/issues/30189
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
2021-05-10 10:34:12 -04:00

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#!/bin/sh
# Locate an acceptable Python interpreter and then re-execute the script.
# Note that the mix of single and double quotes is intentional,
# as is the fact that the ] goes on a new line.
_=[ 'exec' '/bin/sh' '-c' '''
command -v python3.9 >/dev/null && exec python3.9 "$0" "$@"
command -v python3.8 >/dev/null && exec python3.8 "$0" "$@"
command -v python3.7 >/dev/null && exec python3.7 "$0" "$@"
command -v python3.6 >/dev/null && exec python3.6 "$0" "$@"
command -v python3 >/dev/null && exec python3 "$0" "$@"
exec python "$0" "$@"
''' "$0" "$@"
]
del _
import sys
try:
from shutil import which
except ImportError:
from distutils.spawn import find_executable as which
print('Node.js configure: Found Python {}.{}.{}...'.format(*sys.version_info))
acceptable_pythons = ((3, 9), (3, 8), (3, 7), (3, 6))
if sys.version_info[:2] in acceptable_pythons:
import configure
else:
python_cmds = ['python{}.{}'.format(*vers) for vers in acceptable_pythons]
sys.stderr.write('Please use {}.\n'.format(' or '.join(python_cmds)))
for python_cmd in python_cmds:
python_cmd_path = which(python_cmd)
if python_cmd_path and 'pyenv/shims' not in python_cmd_path:
sys.stderr.write('\t{} {}\n'.format(python_cmd_path, ' '.join(sys.argv[:1])))
sys.exit(1)