This file is indexed.

postinst is in thunderbird 1:24.4.0+build1-0ubuntu1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh

set -e

MOZ_PKG_NAME=thunderbird

# Move a conffile without triggering a dpkg question
finish_mv_conffile() {
    local OLDCONFFILE="$1"
    local NEWCONFFILE="$2"

    rm -f $OLDCONFFILE.dpkg-remove

    [ -e "$OLDCONFFILE" ] || return 0

    echo "Preserving user changes to $NEWCONFFILE (renamed from $OLDCONFFILE)..."
    mv -f "$NEWCONFFILE" "$NEWCONFFILE.dpkg-new"
    mv -f "$OLDCONFFILE" "$NEWCONFFILE"
}

if [ "$1" = "configure" ] ; then
    finish_mv_conffile "/etc/${MOZ_PKG_NAME}/pref/thunderbird.js" "/etc/${MOZ_PKG_NAME}/syspref.js"
fi