The filesystem object was available through ModuleContext.Fs(), but
gives too much access to the filesystem without enforicing correct
dependencies. In order to support sandboxing the soong_build
process move the filesystem into the Config. The next change will
make it private.
Bug: 146437378
Test: all Soong tests
Change-Id: I5d3ae9108f120fd335b21efd612aefa078378813
Avoid having to pass ModuleFactoryAdaptor to every call to
RegisterModuleType in a test by wrapping RegisterModuleType.
Test: all soong tests
Change-Id: If8847d16487de0479cc3020b728256922b3cadba
Add a test for the arch mutator in preparation for splitting it
into two mutators.
Test: m checkbuild
Change-Id: Ifd0a146a085901d33db50e783bdfad31edd7b7a6
Runtime-created struct types have limit on the name of the type,
which is the full text of the fields in the struct. Avoid creating
runtime struct types when filtering produces an identical struct.
Also add tests and godoc for filterArchStruct.
Test: arch_test.go
Change-Id: If7eb27ea9e72073d5252e93f2110b08889ed76b1