Puppet Template Headers

test.txt.erb

Original header used now:

### File managed with puppet ###
## Served by:        '<%= scope.lookupvar('::servername') %>'
## Module:           '<%= scope.to_hash['module_name'] %>'
## Template source:  'MODULES<%= template_source.gsub(Regexp.new("^#{Puppet::Node::Environment.current[:modulepath].gsub(':','|')}"),"") %>'

Problem: When using puppet apply with relative modulepath, the information can be wrong or messy.

Alternative 1:
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<% module_paths =  Puppet::Node::Environment.current[:modulepath].split(':').map{|i| File.expand_path(i) }.join("|") -%>
## Template source:  'MODULES<%= template_source.gsub(Regexp.new("^#{module_paths}"),"") %>'

Adds more complexity (expand paths) but is portable and can be copy pasted between files

Alternative 2:
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## Template source:  'MODULES/<%= scope.to_hash['module_name'] %>/templates/test.txt.erb'

Easy but needs to be adjusted for every template.

Alternative 3:
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## Template Source:  'MODULES/<%= scope.to_hash['module_name'] %>/<%= template_source.sub(Regexp.new('^.*\/(templates\/.*)$'), '\1') %>

Not that complex but might be wrong when there is another /templates/ section somewhere in the path.