preinstall

#!/bin/bash
ANSWER=Yes

if [ -e /usr/local/bin/sage ]; then
    ANSWER=`osascript \
-e 'button returned of (display dialog "May we overwrite your current /usr/local/bin/sage file?" buttons {"No", "Yes"})' \
`
    if [ $ANSWER == "No" ]; then
        osascript -e 'display dialog "Please rerun the installer, but press \"Customize\" and uncheck \"Sage Script\"." buttons {"OK"}'
        exit 1
    fi
fi

if [ -e /usr/local/texlive/texmf-local/tex/latex/local/sagetex.sty ]; then
    ANSWER=`osascript \
-e 'button returned of (display dialog "May we overwrite your current sagetex.sty file?" buttons {"No", "Yes"})' \
`
    if [ $ANSWER != "Yes" ]; then
        osascript -e 'display dialog "Please rerun the installer, but press \"Customize\" and uncheck \"SageTeX\"." buttons {"OK"}'
        exit 1
    fi
fi