[GitHub] iilyak opened a new pull request #1432: Support callback module data provider

[GitBox <gi...@apache.org>]

iilyak opened a new pull request #1432: Support callback module data provider
URL: https://github.com/apache/couchdb/pull/1432
 
 
   ## Overview
   
   This fixes the use case when data provider module for `couch_epi` is not a pure functional.
   To illustrate the issue let's look at the following code:
   ```
   -export([data/0]).
   
   data() ->
      config:get("some_section").
   ```
   
   We would want to regenerate dynamically compiled module when term returned from `data/0` is changed. However the previous implementation of `module` data provider was relying on `vsn` attribute of a module. Which is valid approach if the data term is hard coded in the module source.
   
   This PR also renames `module` data provider into `static_module`.
   
   ## Testing recommendations
   
   ```
   make eunit apps=couch_epi
   ```
   
   ## Checklist
   
   - [x] Code is written and works correctly;
   - [x] Changes are covered by tests;
   - [x] Documentation reflects the changes;
   

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