install hook fails with: "command not found"

While testing the liferay charm I found that it does not install.

The install hook is trying to call ch_get_file and that command/function does not exist.

Here is the unit-liferay.log

2014-09-02 20:16:39 INFO install E: Unable to locate package charm-helper-sh
2014-09-02 20:16:39 INFO install /var/lib/juju/agents/unit-liferay-0/charm/hooks/install: line 13: /usr/share/charm-helper/sh/net.sh: No such file or directory
2014-09-02 23:54:31 INFO juju-log Fetching latest upstream Liferay release from http://sourceforge.net/projects/lportal/files/Liferay%20Portal/6.1.1%20GA2/liferay-portal-tomcat-6.1.1-ce-ga2-20120731132656558.zip/download with expected hash f88ad198dc9bc154528f67d64291ad4762333df5
2014-09-02 23:54:31 INFO install /var/lib/juju/agents/unit-liferay-0/charm/hooks/install: line 17: ch_get_file: command not found
2014-09-02 23:54:31 INFO worker.uniter.jujuc server.go:102 running hook tool "juju-log" ["Failed to retrieve http://sourceforge.net/projects/lportal/files/Liferay%20Portal/6.1.1%20GA2/liferay-portal-tomcat-6.1.1-ce-ga2-20120731132656558.zip/download"]
2014-09-02 23:54:31 DEBUG worker.uniter.jujuc server.go:103 hook context id "liferay/0:install:6499797840946805776"; dir "/var/lib/juju/agents/unit-liferay-0/charm"
2014-09-02 23:54:31 INFO juju-log Failed to retrieve http://sourceforge.net/projects/lportal/files/Liferay%20Portal/6.1.1%20GA2/liferay-portal-tomcat-6.1.1-ce-ga2-20120731132656558.zip/download
2014-09-02 23:54:31 ERROR juju.worker.uniter uniter.go:486 hook failed: exit status 1

This is because the charm-helper-sh package does not exist in the main packages. We have preserved this older package in a PPA so the install hook can be changed to use ppa:charmers/charm-helpers. This however will only work in precise and not in trusty. Alternately we could re-write the install hook to wget the file and check the hash in the charm code so it is self contained. This is left up to the author fixing this problem.