This file is indexed.

postinst is in nodejs 8.10.0~dfsg-2.

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

if [ "$1" = "configure" ]; then
	if dpkg --compare-versions "$2" le 0.6.19~dfsg1-2; then
		update-alternatives --remove js /usr/bin/node
	fi

    update-alternatives --install /usr/bin/js js /usr/bin/nodejs 200 \
                        --slave /usr/share/man/man1/js.1.gz js.1.gz /usr/share/man/man1/nodejs.1.gz
fi