.bashrc to enable virtualenvwrapper for MinGW bash shells

.bash_virtualenvwrapper.sh

# If you are using a MinGW environment
# such as that provided by the bash shell included
# with GitHub for Windows, this script will
# make sure you have the necessary tools installed
# to run virtualenvwrapper.
#
# You can add the following to your .bashrc file to automatically
# download and run this gist when you start your shell:
#
# if [ ! -e $HOME/.bash_virtualenvwrapper.sh ]; then
#     curl -L https://gist.github.com/michaelbrooks/9553013/raw -o $HOME/.bash_virtualenvwrapper.sh
# fi
#
# if [ -e $HOME/.bash_virtualenvwrapper.sh ]; then
#     source $HOME/.bash_virtualenvwrapper.sh
# fi

if [ "$MSYSTEM" ]; then

    # Find your python
    PYTHON_DIR=$(dirname `which python`)

    # See http://www.asyndetic.com/blog/2012/05/01/virtualenvwrapper-is-for-windows-users-too/

    if [ -e "$PYTHON_DIR/Scripts/virtualenvwrapper.sh" ]; then
    
        echo "Setting up virtualenvwrapper..."
    
        # mktemp is required by virtualenvwrapper, but is not necessarily
        # included in your MinGW setup.
        
        if ! command -v mktemp > /dev/null; then
            echo "Installing mktemp..."
        
            objname=/tmp/mktemp-1.6-2-msys-1.0.13-bin

            curl -L -o $objname.tar.lzma http://downloads.sourceforge.net/project/mingw/MSYS/Extension/mktemp/mktemp-1.6-2/mktemp-1.6-2-msys-1.0.13-bin.tar.lzma > /dev/null

            if (command -v 7za > /dev/null); then
                7za x $objname.tar.lzma -o/tmp > /dev/null
                7za x $objname.tar -o/ > /dev/null
                rm $objname.tar $objname.tar.lzma > /dev/null
            elif (command -v tar > /dev/null) && (command -v lzma > /dev/null); then
                tar --lzma -xf $objname.tar.lzma --directory=/
                rm $objname.tar.lzma
            else
                echo "ERROR: Installing mktemp requires 7za or lzma."
            fi
        fi
        
        if ! command -v fmt > /dev/null; then
            echo "Making a fake fmt command..."

            cat > /bin/fmt << EOF
#!/bin/bash
while read x; do
    echo \$x | sed "s;\s\+;\n;g"
done
EOF
        fi
        
        if ! command -v mktemp > /dev/null; then
            echo "ERROR: unable to install mktemp.exe! Cannot set up virtualenvwrapper."
        else
            export WORKON_HOME=$HOME/.virtualenvs
            
            # This is the case with the GitHub bash shell
            export MSYS_HOME=/
            
            source $PYTHON_DIR/Scripts/virtualenvwrapper.sh
                    
            echo "...done."
        fi
    else
        echo "Error: virtualenvwrapper not installed. Use 'pip install virtualenvwrapper' to install it globally."
    fi
fi

If you are using a MinGW environment such as that provided by the bash shell included with GitHub for Windows, this script will make sure you have the necessary tools installed to run virtualenvwrapper.

You can add the following to your .bashrc file to automatically download and run this gist when you start your shell:

if [ ! -e $HOME/.bash_virtualenvwrapper.sh ]; then
    curl -L https://gist.github.com/michaelbrooks/9553013/raw -o $HOME/.bash_virtualenvwrapper.sh 2> /dev/null
fi

if [ -e $HOME/.bash_virtualenvwrapper.sh ]; then
    source $HOME/.bash_virtualenvwrapper.sh
fi