Problem: building Omnigres packages

Problem getting sources without infinite recursion

Solution: use a working method

This is still very difficult to understand, but at least it works for now. The
idea here is to only get sources for the previous version but no further.

Author: yrashk

packages/omnigres/package.rb

@@ -208,21 +208,23 @@ def requires
       end
     end
 
-    def original_sources
-      method(:sources).super_method.call
+    def dont_fetch_previous
+      @dont_fetch_previous = true
+      self
     end
 
     def sources
       return @srcs if @srcs
 
-      @srcs = original_sources
+      @srcs = super
+      return @srcs if @dont_fetch_previous
       unless contains_vendorized_deps?
         @srcs.push(deps_tar_gz)
       end
       if previous_version && !previous_version.broken?
         begin
           puts "Fetching previous version #{previous_version.version} to be able to generate migrations"
-          @srcs.push(*previous_version.original_sources) # archive
+          @srcs.push(*previous_version.dont_fetch_previous.sources) # archive
           @srcs.push(previous_version.deps_tar_gz("deps-prev")) unless previous_version.contains_vendorized_deps?
         rescue UnsupportedVersion
           # ignore this one, just don't build an upgrade