Allow parsing Blueprints files without evaluating

Running bpfmt or bpmodify on a Blueprints file that references
variables defined in a parent Blueprints file causes parse errors
on unknown variables.  Modify the parser to parse in two modes,
parser.Parse and parser.ParseAndEval.  The first parses without
attempting to evaluate variables and expressions, the second
performs a full evaluation.

Change-Id: Ic11948ea77c8e65379d7260591ada15db0e4f5b9
3 files changed
tree: 1a32964044b1b323290af7a6a45030e0bc7f8529
  1. bootstrap/
  2. bpfmt/
  3. bpmodify/
  4. deptools/
  5. parser/
  6. pathtools/
  7. proptools/
  8. Blueprints
  9. bootstrap.bash
  10. build.ninja.in
  11. context.go
  12. context_test.go
  13. CONTRIBUTING.md
  14. doc.go
  15. LICENSE
  16. live_tracker.go
  17. mangle.go
  18. module_ctx.go
  19. ninja_defs.go
  20. ninja_strings.go
  21. ninja_strings_test.go
  22. ninja_writer.go
  23. ninja_writer_test.go
  24. package_ctx.go
  25. README.md
  26. scope.go
  27. singleton_ctx.go
  28. splice_modules_test.go
  29. unpack.go
  30. unpack_test.go
README.md

Blueprint Build System

Blueprint is a meta-build system that reads in Blueprints files that describe modules that need to be built, and produces a Ninja (http://martine.github.io/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.