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#!/bin/bash -ex
# Usage:
# createvirtualenv /path/to/python /output/path/for/venv
# * param1: Python binary to use for the virtualenv
# * param2: Path to the virtualenv to create
createvirtualenv () {
PYTHON=$1
VENVPATH=$2
# Prefer venv
VENV="$PYTHON -m venv"
if [ "$(uname -s)" = "Darwin" ]; then
VIRTUALENV="$PYTHON -m virtualenv"
else
VIRTUALENV=$(command -v virtualenv 2>/dev/null || echo "$PYTHON -m virtualenv")
VIRTUALENV="$VIRTUALENV -p $PYTHON"
fi
if ! $VENV $VENVPATH 2>/dev/null; then
# Workaround for bug in older versions of virtualenv.
$VIRTUALENV $VENVPATH 2>/dev/null || $VIRTUALENV $VENVPATH
fi
if [ "Windows_NT" = "${OS:-}" ]; then
# Workaround https://bugs.python.org/issue32451:
# mongovenv/Scripts/activate: line 3: $'\r': command not found
dos2unix $VENVPATH/Scripts/activate || true
. $VENVPATH/Scripts/activate
else
. $VENVPATH/bin/activate
fi
export PIP_QUIET=1
python -m pip install --upgrade pip
}
# Usage:
# PYTHON = find_python3
find_python3() {
PYTHON=""
# Add a fallback system python3 if it is available and Python 3.9+.
if is_python_39 "$(command -v python3)"; then
PYTHON="$(command -v python3)"
fi
# Find a suitable toolchain version, if available.
if [ "$(uname -s)" = "Darwin" ]; then
PYTHON="/Library/Frameworks/Python.Framework/Versions/3.9/bin/python3"
elif [ "Windows_NT" = "${OS:-}" ]; then # Magic variable in cygwin
PYTHON="C:/python/Python39/python.exe"
else
# Prefer our own toolchain, fall back to mongodb toolchain if it has Python 3.9+.
if [ -f "/opt/python/3.9/bin/python3" ]; then
PYTHON="/opt/python/3.9/bin/python3"
elif is_python_39 "$(command -v /opt/mongodbtoolchain/v4/bin/python3)"; then
PYTHON="/opt/mongodbtoolchain/v4/bin/python3"
elif is_python_39 "$(command -v /opt/mongodbtoolchain/v3/bin/python3)"; then
PYTHON="/opt/mongodbtoolchain/v3/bin/python3"
fi
fi
if [ -z "$PYTHON" ]; then
echo "Cannot run pre-commit without python3.9+ installed!"
exit 1
fi
echo "$PYTHON"
}
# Function that returns success if the provided Python binary is version 3.9 or later
# Usage:
# is_python_39 /path/to/python
# * param1: Python binary
is_python_39() {
if [ -z "$1" ]; then
return 1
elif $1 -c "import sys; exit(sys.version_info[:2] < (3, 9))"; then
# runs when sys.version_info[:2] >= (3, 9)
return 0
else
return 1
fi
}
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