Add presingletons

PreSingletons use the same interface as Singletons, but run after
parsing all the blueprint files but before running any mutators
or GenerateBuildActions.  They can be used to perform global setup,
including generating rules, that may be referenced by later
mutator or generate passes.

Test: m checkbuild
Change-Id: I4b93425a724e739f5b8843262efb8804b3bf3531
1 file changed
tree: 5cc9989ea43c6b873df4e7a02b5cf76e480d8860
  1. bootstrap/
  2. bpfmt/
  3. bpmodify/
  4. deptools/
  5. gotestmain/
  6. gotestrunner/
  7. loadplugins/
  8. microfactory/
  9. parser/
  10. pathtools/
  11. proptools/
  12. tests/
  13. .gitignore
  14. .travis.fix-fork.sh
  15. .travis.gofmt.sh
  16. .travis.install-ninja.sh
  17. .travis.yml
  18. blueprint.bash
  19. blueprint_impl.bash
  20. Blueprints
  21. bootstrap.bash
  22. context.go
  23. context_test.go
  24. CONTRIBUTING.md
  25. doc.go
  26. glob.go
  27. LICENSE
  28. live_tracker.go
  29. mangle.go
  30. module_ctx.go
  31. ninja_defs.go
  32. ninja_strings.go
  33. ninja_strings_test.go
  34. ninja_writer.go
  35. ninja_writer_test.go
  36. package_ctx.go
  37. README.md
  38. scope.go
  39. singleton_ctx.go
  40. splice_modules_test.go
  41. unpack.go
  42. unpack_test.go
  43. visit_test.go
README.md

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.