How do I get a postinst stage properly executed - traceroute will not install correctly

[David Garrod]

I'm trying to get the "traceroute" package to install properly inside my SNAP. To do this I've added

traceroute

to the

    stage-packages:

line in my snapcraft.yaml. The files to get put into the;

/snap/openswitch-appliance/x1/...

$SNAP tree and indeed I can then see them from inside the SNAP.

root at Snappy-Appliance:/home/netop# find $SNAP -name "traceroute*"
/snap/openswitch-appliance/x1/usr/bin/traceroute-nanog
/snap/openswitch-appliance/x1/usr/bin/traceroute.db
/snap/openswitch-appliance/x1/usr/bin/traceroute6.db
/snap/openswitch-appliance/x1/usr/share/doc/traceroute
/snap/openswitch-appliance/x1/usr/share/man/man1/traceroute-nanog.1.gz
/snap/openswitch-appliance/x1/usr/share/man/man1/traceroute.db.1.gz
/snap/openswitch-appliance/x1/usr/share/man/man1/traceroute6.db.1.gz

But the problem is that the installation isn't properly finished because the the postinst stage didn't get run. If you look at the postinst stage for the traceroute package you'll see what I've listed below.

In other words for this package to work it is meant to build some softlinks to /etc so that "traceroute" is actually made available.

How am I meant to do this is the SNAP world?

Thanks,

Dave Garrod

% cat DEBIAN/postinst
#!/bin/sh

set -e

case "${1}" in
        configure)
                update-alternatives --install \
                        /usr/bin/traceroute traceroute /usr/bin/traceroute.db 100 \
                        --slave /usr/sbin/traceroute traceroute.sbin \
                                /usr/bin/traceroute.db \
                        --slave /usr/share/man/man1/traceroute.1.gz traceroute.1.gz \
                                /usr/share/man/man1/traceroute.db.1.gz

                for _ALTERNATIVE in traceroute6 lft traceproto
                do
                        update-alternatives --install \
                                /usr/bin/${_ALTERNATIVE} ${_ALTERNATIVE} /usr/bin/${_ALTERNATIVE}.db 100 \
                                --slave /usr/share/man/man1/${_ALTERNATIVE}.1.gz ${_ALTERNATIVE}.1.gz \
                                        /usr/share/man/man1/${_ALTERNATIVE}.db.1.gz
                done

                for _ALTERNATIVE in tcptraceroute
                do
                        update-alternatives --install \
                                /usr/sbin/${_ALTERNATIVE} ${_ALTERNATIVE} /usr/sbin/${_ALTERNATIVE}.db 100 \
                                --slave /usr/share/man/man8/${_ALTERNATIVE}.8.gz ${_ALTERNATIVE}.8.gz \
                                        /usr/share/man/man8/${_ALTERNATIVE}.db.8.gz
                done
                ;;

        abort-upgrade|abort-remove|abort-deconfigure)

                ;;

        *)
                echo "postinst called with unknown argument \`${1}'" >&2
                exit 1
                ;;
esac



exit 0


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