Change a Unix path in to Windows path for WSL

winpath.sh

winpath() {
    # get the Windows user path, convert to Unix line endings
    user_path=$(echo "$(/mnt/c/Windows/System32/cmd.exe /C echo %HOMEDRIVE%%HOMEPATH%)" | tr -d "\r")

    # expand the specified path
    target_path=$(readlink -f $1)

    # change ~ to $user_path
    if grep -q "^/home/" <<< $target_path; then
        temp_user_path=$(echo "$user_path" | sed -e 's|\\|/|g' -e 's|^\([A-Za-z]\)\:/\(.*\)|/mnt/\L\1\E/\2|' -e 's|^M$||')

        # if there was something after ~, add it to the end of the $user_path
        if grep -q "^/home/\(.*\)/\(.*\)" <<< $target_path; then
            target_path=$temp_user_path$(echo "$target_path" | sed -e 's|^/home/*/\(.*\)|/\2|')
        # if there was nothing after ~, $target_path is $user_path
        else
            target_path=$temp_user_path
        fi
    fi

    # check if a Windows path is getting parsed
    if grep -q "^/mnt/[a-z]" <<< $target_path; then
        # swap /mnt/[a-z] with [A-Z]: and / with \
        echo $(echo "$target_path" | sed -e 's|^\(/mnt/\([a-z]\)\)\(.*\)|\U\2:\E\3|' -e 's|/|\\|g')
    else
        # return the user's home directory if a Unix path was parsed
        echo $user_path
    fi
}