python

#!/bin/bash
# Finds and execute the local python interpreter.
# In addition to Linux, we can execute this script on Windows for eg. from MINGW / Git bash.
# Usage: ./python <args>

if [[ "$VIRTUAL_ENV" != "" ]]
then
    # Special case when being in a virtual env: just run the default interpreter
    python "$@"
    exit $?
fi

SELF_DIR=$(dirname "$0")

if [ -f $SELF_DIR/.bin.json ]
then
    # Development: read the .bin.json file to find the binaries dir
    bin_dir=$(grep -Po '"binary_dir"\s*:\s*\K".+"' $SELF_DIR/.bin.json | cut -d'"' -f2)
else
    # Assume we have an install tree, or we are in packaged binaries
    bin_dir=bin
fi

if [ -f ./$bin_dir/activate ]
then
    # This is a virtual env, which is not currently 'activated'.
    # Like with the 1st case, let's not disable the user site dir (-s option) as
    # some packages such as numpy may be installed there.
    CMD="$SELF_DIR/$bin_dir/python"
else
    # This is a standalone/full python distribution. In this case we install all
    # the 3rd-party dependencies locally and don't need the user site dir.
    CMD="$SELF_DIR/$bin_dir/python -s"
fi

# When executing on Windows from Git bash or equivalent, use winpty to make the
# interactive interpreter behave correctly
if [ -x /usr/bin/winpty ]
then
    CMD="winpty -Xallow-non-tty $CMD"
fi

$CMD "$@"