Only instantiate nil struct pointers that are used

unpackProperties was instantiating all nil struct pointers in any struct
that had a property set.  Check if the property is set first, and only
instantiate the struct if it was set.

This has a slight behavioral change, as now structures that only exist
through nil pointers and are never set into will not be type-checked.
This should be fixed in a later patch set that moves the type checking
to be done across all property structs once per factory before blueprint
files are loaded.

Change-Id: I0dea34d7fff76bb4fc907516a2d996e4ea2408d6
1 file changed
tree: 79002bf23ddc9e0d2a00825805d04d554a581ef8
  1. bootstrap/
  2. bpfmt/
  3. bpmodify/
  4. choosestage/
  5. deptools/
  6. gotestmain/
  7. gotestrunner/
  8. loadplugins/
  9. parser/
  10. pathtools/
  11. proptools/
  12. tests/
  13. .gitignore
  14. .travis.fix-fork.sh
  15. .travis.install-ninja.sh
  16. .travis.yml
  17. blueprint.bash
  18. Blueprints
  19. bootstrap.bash
  20. build.ninja.in
  21. context.go
  22. context_test.go
  23. context_test_Blueprints
  24. CONTRIBUTING.md
  25. doc.go
  26. LICENSE
  27. live_tracker.go
  28. mangle.go
  29. module_ctx.go
  30. ninja_defs.go
  31. ninja_strings.go
  32. ninja_strings_test.go
  33. ninja_writer.go
  34. ninja_writer_test.go
  35. package_ctx.go
  36. README.md
  37. scope.go
  38. singleton_ctx.go
  39. splice_modules_test.go
  40. unpack.go
  41. unpack_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.