preinst is in pdl 1:2.018-1ubuntu4.
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.
1 2 3 4 5 6 7 8 9 10 | #!/bin/sh
set -e
# Switch directory to symlink
if dpkg-maintscript-helper supports dir_to_symlink 2>/dev/null; then
dpkg-maintscript-helper dir_to_symlink \
/usr/lib/x86_64-linux-gnu/perl5/5.26/PDL/HtmlDocs/PDL /var/lib/pdl/html 1:2.016-1~exp3~ -- "$@"
fi
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