Add support for dependency tags

Primary builder logic is becoming complicated due to the two pass nature
of mutators that add dependencies and GenerateBuildActions that handle
the dependencies.  The reason why the dependency was added is lost by
the time GenerateBuildActions is called, resulting in build logic that
has to recreate all the dependencies and try to match them up to the
modules returned by VisitDirectDeps.

Change the API of AddDependency to take a DependencyTag interface, which
is satisifed by anything that embeds BaseDependencyTag.  Mutators and
GenerateBuildActions that call VisitDirectDeps can pass each Module to
ctx.OtherModuleDependencyTag to retreive the DependencyTag that was
passed when adding the dependency.

Change-Id: I0814dcd26d1670302d340b77e8dc8704ed7b60bf
3 files changed
tree: a50d94a12f09af179063ad07385b74a3bc1f9dbd
  1. .gitignore
  4. .travis.yml
  5. Blueprints
  9. blueprint.bash
  10. bootstrap.bash
  11. bootstrap/
  12. bpfmt/
  13. bpmodify/
  15. choosestage/
  16. context.go
  17. context_test.go
  18. context_test_Blueprints
  19. deptools/
  20. doc.go
  21. gotestmain/
  22. gotestrunner/
  23. live_tracker.go
  24. loadplugins/
  25. mangle.go
  26. module_ctx.go
  27. ninja_defs.go
  28. ninja_strings.go
  29. ninja_strings_test.go
  30. ninja_writer.go
  31. ninja_writer_test.go
  32. package_ctx.go
  33. parser/
  34. pathtools/
  35. proptools/
  36. scope.go
  37. singleton_ctx.go
  38. splice_modules_test.go
  39. tests/
  40. unpack.go
  41. unpack_test.go

Blueprint Build System

Build Status

Blueprint is a meta-build system that reads in Blueprints files that describe modules that need to be built, and produces a Ninja manifest describing the commands that need to be run and their dependencies. Where most build systems use built-in rules or a domain-specific language to describe the logic for converting module descriptions to build rules, Blueprint delegates this to per-project build logic written in Go. For large, heterogenous projects this allows the inherent complexity of the build logic to be maintained in a high-level language, while still allowing simple changes to individual modules by modifying easy to understand Blueprints files.