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author | Ken Barber <ken@bob.sh> | 2011-04-29 09:27:10 +0200 |
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committer | Ken Barber <ken@bob.sh> | 2011-04-30 15:59:31 +0200 |
commit | 99a93d366f2e1efb977fcc8fe300d3d8357c8214 (patch) | |
tree | fab7510323f123c83da6d7c6cae4fe9e3f2f1e27 /lib/puppet/parser/functions/load_variables.rb | |
parent | 781a8720577d0cafe2147f3a1b938db7bec31789 (diff) |
Convert to module format.
Diffstat (limited to 'lib/puppet/parser/functions/load_variables.rb')
-rw-r--r-- | lib/puppet/parser/functions/load_variables.rb | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/load_variables.rb b/lib/puppet/parser/functions/load_variables.rb new file mode 100644 index 0000000..a28c64b --- /dev/null +++ b/lib/puppet/parser/functions/load_variables.rb @@ -0,0 +1,77 @@ +# +# load_variables.rb +# + +module Puppet::Parser::Functions + newfunction(:load_variables, :type => :statement, :doc => <<-EOS +This function will allow for loading variables from an external YAML +file and expose them for further use inside the Puppet manifest file ... + +For example: + +Given following content of the data.yaml file: + + --- + host1.example.com: + foo: bar + baz: quux + question: 42 + host2.example.com: + abc: def + this: that + darth: vader + +Then calling load_variables in Puppet manifest file as follows: + + load_variables("/etc/puppet/data.yaml", $fqdn) + +Will result in addition of variables $foo, $baz and $question +for matching host name as per the variable $fqdn ... + +Another example which uses per-host file: + +Given following content of the file data-host1.example.com.yaml: + + --- + foo: bar + +Then when we call load_variables like this: + + load_variables("/etc/puppet/data-${fqdn}.yaml") + +This will result in a variable $foo being added and ready for use. + EOS + ) do |arguments| + + raise(Puppet::ParseError, "load_variables(): Wrong number of " + + "arguments given (#{arguments.size} for 2)") if arguments.size < 2 + + data = {} + + file = arguments[0] + key = arguments[1] if arguments[1] + + if File.exists?(file) + + begin + data = YAML.load_file(file) + rescue => error + raise(Puppet::ParseError, "load_variables(): Unable to load data " + + "from the file `%s': %s" % file, error.to_s) + end + + raise(Puppet::ParseError, "load_variables(): Data in the file `%s' " + + "is not a hash" % file) unless data.is_a?(Hash) + + data = ((data[key] and data[key].is_a?(Hash)) ? data[key] : {}) if key + end + + data.each do |param, value| + value = strinterp(value) # Evaluate any interpolated variable names ... + + setvar(param, value) + end + end +end + +# vim: set ts=2 sw=2 et : |