Install standalobe python on Windows

standaalone-python-install.sh

#!/bin/sh

set -eu
cd /tmp

function setup_profile() {
cat >> ~/.bashrc  << _EOF_
export PATH=~/usm/python/install:~/usm/python/install/Scripts:\$PATH
_EOF_
}

mkdir -p ~/bin ~/usm

curl -LO https://github.com/indygreg/python-build-standalone/releases/download/20210506/cpython-3.9.5-x86_64-pc-windows-msvc-shared-pgo-20210506T0943.tar.zst
curl -LO https://github.com/facebook/zstd/releases/download/v1.5.0/zstd-v1.5.0-win64.zip
rm -rf zstd-v1.5.0-win64
unzip -q zstd-v1.5.0-win64.zip
rm -f cpython-3.9.5-x86_64-pc-windows-msvc-shared-pgo-20210506T0943.tar
/tmp/zstd-v1.5.0-win64/zstd.exe -d cpython-3.9.5-x86_64-pc-windows-msvc-shared-pgo-20210506T0943.tar.zst
tmp_dir=$(mktemp -d)
echo Extracing python from cpython-3.9.5-x86_64-pc-windows-msvc-shared-pgo-20210506T0943.tar...
tar -C $tmp_dir -xf  cpython-3.9.5-x86_64-pc-windows-msvc-shared-pgo-20210506T0943.tar
rm -rf  ~/usm/python
mv $tmp_dir/python ~/usm
echo usm python installed at $HOME/usm/python

# Fix path for pip install
USM_PYTHON="#!$(cygpath --windows $HOME/usm/python/install/python.exe|sed "s/\\\\/\\\\\\\\/g")"
sed -i "1s/.*/$USM_PYTHON/" "$HOME/usm/python/install/scripts/pip-script.py"
PATH=~/usm/python/install:~/usm/python/install/Scripts:$PATH

echo Installing some base python packages...
$HOME/usm/python/install/python.exe -m pip -q install httpie ptpython

# setup the profile
[[ ! -f ~/.bashrc ]] &&  setup_profile
grep -c usm/python/install ~/.bashrc >/dev/null || setup_profile

echo "Python interpreter path: $(cygpath --windows $HOME/usm/python/install/python.exe)"
echo ""
echo "You must restart the GitBash terminal to have the environment reloaded!"