Make [Barback.getAllAssets] work when called synchronously. This was broken because InputNode didn't take its input being dirty into account when calculating whether it was dirty, so the synchronous period between providing Barback with assets and getting those assets' values had the graph marked as clean but none of its outputs yet available. R=rnystrom@google.com Review URL: https://codereview.chromium.org//238503003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@35098 260f80e4-7a28-3924-810f-c04153c831b5
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.