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Python 2/3 #345
Description
Portions of NUT rely on the first python command in $PATH being Python 2. (Fortunately, this tends to only affects those building from Git, not from a source tarball.)
Before we jump in and upgrade everything to Python 3, let's summarize what the various distributions ship by default:
- Debian 8 (jessie): minimal install does not provide Python
python-minimal, which provides symlinks/usr/bin/python2and/usr/bin/python, depends onpython2.7-minimalpackage, which provides/usr/bin/python2.7
- Ubuntu 12.04 (precise): same as Debian, but
python-minimalis installed by default - Ubuntu 14.04 (trusty): same as Debian, but
python-minimalis installed by default - Ubuntu 16.04 (xenial): same as Debian (none installed by default)
- Arch (prior to 2010-10-18): no Python in 'base' group;
/usr/bin/pythonpointed to python 2 (at that time/usr/bin/python2.6, not 2.7), now to python 3 (package 'python') - Arch (2010-10-18 through at least 2016-11-28): no Python in 'base' group; python 2 can be installed with 'python2' package, which provides
/usr/bin/python2symlink pointing to/usr/bin/python2.7. - Mac OS X 10.11:
/usr/bin/pythonpoints topython2.7; nopython2symlink- Fink provides a
python2symlink as part of thepythonmeta-package
- Fink provides a
The short answer is that python2.7 seems to be the only name that won't cause confusion.
We could probably run 2to3 and/or use six to be able to run on whatever version is available. Thoughts?
(If you have proposed changes, please commit them to a branch other than master first, thanks!)
Edit: incorporated #345 (comment) and #345 (comment)
Activity
autogen.sh: minor script fixup
aquette commentedon Nov 28, 2016
@clepple: not fully exact
python-minimal, which provides symlinks/usr/bin/python2and/usr/bin/python, depends onpython2.7-minimalpackage, which provides/usr/bin/python2.7=> so
/usr/bin/pythonis avail... oncepython-minimalis installed.Other notes:
Hence my crappy "sed" proposal, which ends up with creating a sane default scripts/augeas/nutupsconf.aug.in for distribution.
zykh commentedon Nov 28, 2016
As an archer.. Arch Linux:
/usr/bin/python2symlink pointing to/usr/bin/python2.7./usr/bin/pythonpointed to python 2 (at that time/usr/bin/python2.6, not 2.7), now to python 3 (package 'python').clepple commentedon Nov 29, 2016
@aquette and @zykh: thanks, I edited the original description. The "installed by default" part is fuzzy - we advise people to install the build-deps for their distribution, so they don't just have a minimal install at that point.
For our purposes, Python 2.7 is a superset of Python 2.6. I also don't think we need to worry about distributions more than, say, five years back for bootstrapping like this (given that we have release tarballs from that time).
The-Compiler commentedon Nov 29, 2016
Making the script work with python 3 is trivial, see #346.