Fix all strong-mode warnings.

This would be cleaner if we could use async/await, but unfortunately
Barback is extremely sensitive to asynchronous gaps so adding microtask
waits at the beginning of methods causes a bunch of tests to fail.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1947773002 .
32 files changed
tree: 9d0e991440d27d234b7a8d3f4bab4eff432658fe
  1. .analysis_options
  2. .gitignore
  3. .status
  4. CHANGELOG.md
  5. LICENSE
  6. README.md
  7. codereview.settings
  8. example/
  9. lib/
  10. pubspec.yaml
  11. test/
README.md

Barback is an asset build system. It is the library underlying pub's asset transformers in pub build and pub serve.

Given a set of input files and a set of transformations (think compilers, preprocessors and the like), it will automatically apply the appropriate transforms and generate output files. When inputs are modified, it automatically runs the transforms that are affected.

To learn more, see here.