terminalapp.plugin.zsh

# Set Apple Terminal.app resume directory
# based on this answer: http://superuser.com/a/315029
# 2012-10-26: (javageek) Changed code using the updated answer

# Tell the terminal about the working directory whenever it changes.
if [[ "$TERM_PROGRAM" == "Apple_Terminal" ]] && [[ -z "$INSIDE_EMACS" ]]; then
  update_terminal_cwd() {
        # Identify the directory using a "file:" scheme URL, including
        # the host name to disambiguate local vs. remote paths.

        # Percent-encode the pathname.
        local URL_PATH=''
        {
            # Use LANG=C to process text byte-by-byte.
            local i ch hexch LANG=C
            for ((i = 1; i <= ${#PWD}; ++i)); do
                ch="$PWD[i]"
                if [[ "$ch" =~ [/._~A-Za-z0-9-] ]]; then
                    URL_PATH+="$ch"
                else
                    hexch=$(printf "%02X" "'$ch")
                    URL_PATH+="%$hexch"
                fi
            done
        }

        local PWD_URL="file://$HOST$URL_PATH"
        #echo "$PWD_URL"        # testing
        printf '\e]7;%s\a' "$PWD_URL"
    }

    # Register the function so it is called whenever the working
    # directory changes.
    autoload add-zsh-hook
    add-zsh-hook precmd update_terminal_cwd

    # Tell the terminal about the initial directory.
    update_terminal_cwd
fi