This is a rather complex set of structural changes. But to understand it you
really only need to grasp two key sections; the rest is cleanup.
Cleanup commits:
The thrust of these is to localize the code that we are going to change (the
itterator over the dependency graph) and get all the key parts in one place.
[PATCH/puppet 1/8] (6911) Use normal methods to implement "depthfirst?" test
[PATCH/puppet 2/8] (maint) Fix for require order issue
[PATCH/puppet 3/8] (6911) Refactor to localize eval_generate dependency
assumptions
[PATCH/puppet 4/8] (6911) Cleanup of generate_additional_resources
Core of #6911:
These two commits wrap a facade around Transaction's use of the Catalog's
resource_graph
that implement the graph frontier. Look especially at the
Relationship_graph_wrapper
class introduced in lib/puppet/transaction.rb by the second commit.
[PATCH/puppet 5/8] (6911) Add bookkeeping facade around
Transaction#relationship_graph
[PATCH/puppet 6/8] (6911) Core change -- replace topsort with frontier
ordered by salted SHA1
Cleanup:
[PATCH/puppet 7/8] (6911) Cleanup and renaming of transaction internals
Sentinal Whits:
Look at the implementation of Catalog#splice! and especially the axioms
given
there. Everything else follows from these, albeit sometimes along a twisty
path.
[PATCH/puppet 8/8] (5200) -- replace containers with sentinals
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