Script to download busybox and shellshare for a Windows system running mays (as used in Git bash)

msys_shellshare.sh

#!/bin/bash
#
#  if file is accessible from the web:
# /bin/bash -c "$(curl -fsSL https://location.to/file/get_shellshare)"

pushd () {
    command pushd "$@" > /dev/null
}

popd () {
    command popd "$@" > /dev/null
}

# Download script
if [[ ! -x /usr/bin/script ]]; then
    mkdir busybox
    pushd busybox
    curl -sO http://repo.msys2.org/msys/x86_64/busybox-1.23.2-1-x86_64.pkg.tar.xz
    tar Jxf busybox-1.23.2-1-x86_64.pkg.tar.xz
    cp usr/bin/busybox.exe /usr/bin/ 2> /dev/null
    if [[ $? -gt 0 ]]; then
        # git may have been installed system-wide, and it's not writable unless run as administrator.
	    mkdir -p ~/.bin
	    cp usr/bin/busybox.exe ~/.bin/ 2> /dev/null
	    ln -s ~/.bin/busybox.exe ~/.bin/script.exe
	    echo 'export PATH="${HOME}/.bin/:${PATH}"' >> ~/.bash_profile
        echo 'Please, close this shell and open a new one for the changes to take effect.'
    else
	      ln -s /usr/bin/busybox.exe /usr/bin/script.exe
    fi
    popd
    rm -rf busybox
fi

# Download shellshare
if [[ ! -f shellshare ]]; then
    curl -sLO shellshare https://get.shellshare.net
fi

hash python 2>/dev/null || { echo >&2 "Install python and make sure is accessible by gitbash."; exit 1; }