Write ninja file directly to the output file

Writing the ninja file to a byte buffer causes a significant amount
of time to be spent in memmove when growing the byte slice.  Write
the file directly to disk instead.

This also fixes some unhandled error warnings, which become more
likely when doing disk IO instead of byte buffer writes.

Change-Id: I5094e4c45cab4012713037f60c5a4fb00718f92e
4 files changed
tree: 252b6d360e85ef51166c3d7ac3ee090f887a02d0
  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. glob_test.go
  28. go.mod
  29. LICENSE
  30. live_tracker.go
  31. mangle.go
  32. module_ctx.go
  33. name_interface.go
  34. ninja_defs.go
  35. ninja_strings.go
  36. ninja_strings_test.go
  37. ninja_writer.go
  38. ninja_writer_test.go
  39. package_ctx.go
  40. README.md
  41. scope.go
  42. singleton_ctx.go
  43. splice_modules_test.go
  44. unpack.go
  45. unpack_test.go
  46. 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.