Custom fact with home directorys as domains for puppet - bash

Question

I'm trying to generate a custom fact called domains.
the idea is to list all the directories within /home but remove some default directory's such as centos, ec2-user, myadmin.
I'm using bash as I don't know ruby. so far my script outputs the list into a txt file which it then cats the answer for factors. but it is treated as one long answer and not multiple like an array?
My script is as follows:
#!/bin/bash
ls -m /home/ | sed -e 's/, /,/g' | tr -d '\n' > /tmp/domains.txt
cat /tmp/domains.txt | awk '{gsub("it_support,", "");print}'| awk '{gsub("ec2-user,", "");print}'| awk '{gsub("myadmin,", "");print}'| awk '{gsub("nginx", "");print}'| awk '{gsub("lost+found,", "");print}' > /tmp/domains1.txt
echo "domains={$(cat /tmp/domains1.txt)}"
exit
Foremans sees my domains as
facts.domains = "{domain1,domain2,domain3,domain4,lost+found,}"
I also need to remove lost+found, some how.
Any help or advice would be appreciated
Kevin

Answer 1

I'm also not familiar with ruby, but I have an idea for some workaround:
Please look at the following example about returning an array of network interfaces. Now to create domain_array fact use the following code:
Facter.add(:domain_array) do
setcode do
domains = Facter.value(:domains)
domain_array = domains.split(',')
domain_array
end
end

Answer 2

You can put a parser function to do this. Parser functions go inside:
modules/<modulename>/lib/puppet/parser/functions/getdomain.rb
Note: Parser function will compile only in the puppet master. See below for a custom fact that will run on the agent.
getdomain.rb can contain something like the following for your purpose:
module Puppet::Parser::Functions
newfunction(:getdomain, :type => :rvalue) do |args|
dnames=Array.new
Dir.foreach("/home/") do |d|
# Avoid listing directories starts with . or ..
if !d.start_with?('.') then
# You can put more names inside the [...] that you want to avoid
dnames.push(d) unless ['lost+found','centos'].include?(d)
end
end
domainlist=dnames.join(',')
return domainlist
end
end
You can call it from a manifest and assign to a variable:
$myhomedomains=getdomain()
$myhomedomains should return something similar to this : user1,user2,user3
.......
For a custom fact with similar code. You can put it in :
modules/<modulename>/lib/facter/getdomain.rb
Content of getdomain.rb :
Facter.add(:getdomain) do
setcode do
dnames=Array.new
Dir.foreach("/home/") do |d|
# Avoid listing directories starts with . or ..
if !d.start_with?('.') then
# You can put more names inside the [...] that you want to avoid
dnames.push(d) unless ['lost+found','centos'].include?(d)
end
end
getdomain=dnames.join(',')
getdomain
end
end
You can call the getdomain fact in any manifest, for example, calling it from the same module's init.pp :
notify { "$::getdomain" : }
will result in something similar :
Notice: /Stage[main]/Testmodule/Notify[user1,user2,user3]