Share current pwd across multiple shells

zsh-chpwd-store-pwd-plugin.zsh

# Put this into your ~/.zshrc
# Enables chpwd, which runs a command if you cd/pushd/popd...
# Stores your latest pwd into a file and automatically
# cd's into it in case you start another shell
# check also this out https://gist.github.com/norpol/1ff30f0f614c38dccfabb4f9f62a73e6
# you might get this working in bash too https://stackoverflow.com/questions/3276247/is-there-a-hook-in-bash-to-find-out-when-the-cwd-changes

store_pwd() {
    loc="$(pwd)"
    target="/var/run/user/${UID}/cur_dir"
    # use tilde for any path in HOME
    # useful if you want to show your current working dir
    # in i3status bar for example
    if [ "${loc#${HOME}}" != "${loc}" ]; then
        echo "~${loc#${HOME}}" > "${target}"
    else
        echo "${loc}" > "${target}"
    fi
}

cd_latest() {
    target="/var/run/user/${UID}/cur_dir"
    if [ -f "${target}" ]; then
        loc="$(cat "${target}")"
        if [ "${loc#\~}" != "${loc}" ]; then
            loc="${HOME}${loc#\~}"
        fi
        cd "${loc}" 2>/dev/null || rm "${target}"
    fi
}

chpwd() { store_pwd }

cd_latest