- add location finding

where-art-thou/README.md

@@ -0,0 +1,16 @@
+# Find where a module is loaded from
+
+This trick uses a template, $settings::modulepath, and __FILE__ from a template
+to find the location of a template (and thus its module) relative to the puppet
+module path.
+
+
+From this directory, run:
+
+    % puppet apply --modulepath . -e 'include whereareyou'
+
+Output:
+
+    notice: Scope(Class[Whereareyou]): [".", "whereareyou/templates/example.erb"]
+
+The output above is ["module path for this file", "file path relative to the modulepath"]

where-art-thou/whereareyou/manifests/init.pp

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+class whereareyou {
+  notice(template("whereareyou/example.erb"))
+}

where-art-thou/whereareyou/templates/example.erb

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+<%=
+  scope.lookupvar("settings::modulepath").split(":").collect do |path|
+    expandedpath = File.expand_path(path)
+    if __FILE__.start_with?(expandedpath)
+      [path, __FILE__.gsub(expandedpath + "/", "")]
+    else
+      nil
+    end
+  end.select { |f| !f.nil? }.first
+%>