Rhino

$ cat /var/lib/dpkg/info/mono-gac.
mono-gac.list      mono-gac.md5sums   mono-gac.postinst  mono-gac.preinst   mono-gac.prerm
$ cat /var/lib/dpkg/info/mono-gac.list
/.
/usr
/usr/share
/usr/share/cli-common
/usr/share/cli-common/runtimes.d
/usr/share/cli-common/runtimes.d/mono
/usr/share/mono
/usr/share/mono/MonoGetAssemblyName.exe
/usr/share/doc
/usr/share/doc/mono-gac
/usr/share/doc/mono-gac/copyright
/usr/share/doc/mono-gac/changelog.Debian.gz
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/gacutil.1.gz
/usr/bin
/usr/bin/gacutil
$ cat /var/lib/dpkg/info/mono-gac.md5sums
8c6688b06bfd016d65283c47163e62d1  usr/share/cli-common/runtimes.d/mono
75e0e0fea6c68e27a975a253d53c12aa  usr/share/mono/MonoGetAssemblyName.exe
c0fd05fd66dc510f1ace63eb3e370ab5  usr/share/doc/mono-gac/copyright
107573002dbdf16b36ea0c41448e62d6  usr/share/doc/mono-gac/changelog.Debian.gz
10b02f0600b1187d452d1e665a052d78  usr/share/man/man1/gacutil.1.gz
38c6bf4d46b4eccddf9c3cd57626996c  usr/bin/gacutil
$ cat /var/lib/dpkg/info/mono-gac.postinst
#!/bin/sh -e

# Install the GAC
if [ -x /usr/share/cli-common/gac-install ]; then
	/usr/share/cli-common/gac-install mono
fi

# Update the alternatives
update-alternatives \
	--install /usr/bin/cli-gacutil global-assembly-cache-tool /usr/bin/gacutil 10 \
	--slave /usr/share/man/man1/cli-gacutil.1.gz cli-gacutil.1.gz /usr/share/man/man1/gacutil.1.gz


$ cat /var/lib/dpkg/info/mono-gac.preinst
#!/bin/sh
set -e
# revert Ubuntu doc dir symlinking to Debian style
if [ "$1" = "upgrade" ]
    then if dpkg --compare-versions $2 lt 2.4 && [ -L /usr/share/doc/mono-gac ]
        then rm -fr /usr/share/doc/mono-gac
    fi
fi
$ cat /var/lib/dpkg/info/mono-gac.prerm
#!/bin/sh -e

if [ "$1" = remove ]; then
        update-alternatives --remove global-assembly-cache-tool /usr/bin/gacutil

        # Remove the GAC
        if [ -x /usr/share/cli-common/gac-remove ]; then
		/usr/share/cli-common/gac-remove mono
	fi
fi