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>
This commit is contained in:
Richard Lau 2021-05-05 23:48:14 +01:00
parent 63155c95ba
commit 16982b6c4d
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3 changed files with 6 additions and 10 deletions

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@ -246,8 +246,6 @@ Installation via Linux package manager can be achieved with:
FreeBSD and OpenBSD users may also need to install `libexecinfo`.
Python 3 users may also need to install `python3-distutils`.
#### macOS prerequisites
* Xcode Command Line Tools >= 11 for macOS
@ -271,11 +269,6 @@ $ ./configure
$ make -j4
```
If you run into a `No module named 'distutils.spawn'` error when executing
`./configure`, please try `python3 -m pip install --upgrade setuptools` or
`sudo apt install python3-distutils -y`.
For more information, see <https://github.com/nodejs/node/issues/30189>.
The `-j4` option will cause `make` to run 4 simultaneous compilation jobs which
may reduce build time. For more information, see the
[GNU Make Documentation](https://www.gnu.org/software/make/manual/html_node/Parallel.html).

7
configure vendored
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@ -15,7 +15,10 @@ exec python "$0" "$@"
del _
import sys
from distutils.spawn import find_executable
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))
@ -25,7 +28,7 @@ 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 = find_executable(python_cmd)
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)

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@ -14,7 +14,7 @@ import shutil
import bz2
import io
from distutils.spawn import find_executable as which
from shutil import which
from distutils.version import StrictVersion
# If not run from node/, cd to node/.