Kevin, Typical advice is to not use macros (implicitly used in the gists to build a CF DSL) when functions or data will suffice. Sometimes however the syntactic sugar is quite tasty and hard to overlook. I do not have enough knowledge of the domain to suggest what might be the correct approach in this case.
Some additional comments: - your use of with-foo pattern is not idiomatic afaics; this pattern is typically used to scope run-time resource usage - in relation to parameters: the means by which defrecord introduces record attributes may be instructive (if you go the DSL route) rgds Craig On Tuesday, November 26, 2013 7:11:42 PM UTC+11, Kevin Bell wrote: > > Hey Craig, > > Thanks for the input. Forgive my naiveté, but I gather you're implying > that the DSL-ishness is desirable? That makes sense, and it seems to be > inline with what I'm learning about the lisp mindset. > > You're suggestion is actually a lot more like an option that I was > considering but didn't do because it seemed to depart from things like > project.clj that I was emulating. But it might actually make sense to take > it a step further to make the scoping within CloudFormation templates more > explicit. > > I updated my gist with an even more DSL-like concept: > https://gist.github.com/bellkev/7653342<https://www.google.com/url?q=https%3A%2F%2Fgist.github.com%2Fbellkev%2F7653342&sa=D&sntz=1&usg=AFQjCNF5RUFgHxpojQ1x0EPxJFQ09ibA3A> > > On Monday, November 25, 2013 11:49:20 PM UTC-8, Craig wrote: >> >> >> I don't know much about CF templates, but stripping some detail from your >> middle fragment moves further from data and to a DSL: >> >> (deftemplate my-template >> :aws-template-format-version "2010-09-09" >> :description "My description" >> >> (param my-parameter :type :string :description "My string parameter") >> >> (mapping my-mapping >> :first-level-key-one {:second-level-key-one "Value"} >> :first-level-key-two {:second-level-key-two "Another Value"}) >> >> (condition my-condition (not my-parameter)) >> (condition my-second-condition (= (-> my-mapping :first-level-key-one >> :second-level-key-one) my-parameter)) >> >> (resource my-instance aws.ec2/instance :image-id "ami-79fd7eee") >> >> (output my-first-output (:instance-type my-instance)) >> (output my-second-output my-parameter)) >> >> Craig >> >> >> On Tuesday, November 26, 2013 3:41:29 PM UTC+11, Kevin Bell wrote: >>> >>> Hey folks, I'm working on a tool to enable the generation of AWS >>> CloudFormation templates using a Clojure-based syntax kind of like >>> leiningen's project.clj. I'm working on how the syntax should look to be >>> most clojurey, and I wonder if anyone has some input: >>> https://gist.github.com/bellkev/7653342<https://www.google.com/url?q=https%3A%2F%2Fgist.github.com%2Fbellkev%2F7653342&sa=D&sntz=1&usg=AFQjCNF5RUFgHxpojQ1x0EPxJFQ09ibA3A> >>> >>> I should add that I'm very new to Clojure and using this project as an >>> opportunity to learn more about the language internals. So please forgive >>> any particularly non-idiomatic Clojure... >>> >>> Thanks!! >>> >> -- -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
