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Preference Python 3

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Make Python 3 the preferred option, and ensure pip is correctly invoked on systems like Debian that support coexistent python installations.
Assume on other systems that we either win with Python 3 by default, or we were going to lose in any case and just fall back to python 2.
This commit is contained in:
Matthew Hawkins 2017-05-19 11:11:25 +10:00 committed by GitHub
parent fb85867d72
commit ea9e23bf46
1 changed files with 11 additions and 3 deletions
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14
upgrade.sh
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@ -20,9 +20,17 @@ COMMAND="${PREFIX}find . -name \"*.pyc\" -delete"
echo "Cleaning up stale Python bytecode ($COMMAND)..."
eval $COMMAND
# Fall back to pip3 if pip is missing
PIP="pip"
type $PIP >/dev/null 2>&1 || PIP="pip3"
# Prefer Python 3
PIP=pip
if type -P pip3 >/dev/null 2>&1; then
# We're likely on something Debian-based with numbered coexistent pythons.
# If we're running 3.4 or better, use pip3 and invoke scripts with python3
pip_version=$(pip3 --version | sed -e 's/.*(python \(.*\))/\1/')
if [[ ${pip_version:0:1} == 3 && ${pip_version:2:1} -gt 3 ]]; then
PIP=pip3
find . -type f -name '*.py' -execdir sed -i -e '1s/python/python3/' {} +
fi
fi
# Install any new Python packages
COMMAND="${PREFIX}${PIP} install -r requirements.txt --upgrade"