Add Providers to Blueprint

Providers are a new concept for Blueprint, based on providers in Bazel:
https://docs.bazel.build/versions/master/skylark/rules.html#providers

Providers aim to simplify the interaction between modules by replacing
type asserting to arbitrary interfaces with requesting optional data
objects from modules.  This will also move Blueprint closer to supporting
incremental analysis by serializing the providers and only rerunning
the analysis phase on modules whose inputs have changed.

Change-Id: I39f5f78b372412a7dbf151ceccb3f917f6c874bf
6 files changed
tree: df1585f8e87ff8607c0ee6f19b326cacf74242fd
  1. .github/
  2. bootstrap/
  3. bpfmt/
  4. bpmodify/
  5. deptools/
  6. gotestmain/
  7. gotestrunner/
  8. loadplugins/
  9. microfactory/
  10. parser/
  11. pathtools/
  12. proptools/
  13. tests/
  14. .gitignore
  15. .gofmt.sh
  16. blueprint.bash
  17. blueprint_impl.bash
  18. Blueprints
  19. bootstrap.bash
  20. context.go
  21. context_test.go
  22. CONTRIBUTING.md
  23. doc.go
  24. glob.go
  25. glob_test.go
  26. go.mod
  27. LICENSE
  28. live_tracker.go
  29. mangle.go
  30. module_ctx.go
  31. module_ctx_test.go
  32. name_interface.go
  33. ninja_defs.go
  34. ninja_strings.go
  35. ninja_strings_test.go
  36. ninja_writer.go
  37. ninja_writer_test.go
  38. package_ctx.go
  39. provider.go
  40. provider_test.go
  41. README.md
  42. scope.go
  43. singleton_ctx.go
  44. splice_modules_test.go
  45. visit_test.go
README.md

Blueprint Build System

build

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.