dart-lang/spark — pull request #1815 by ussuri (2014-05-07 00:27:10+00:00)
Title: Improve developer flags

@devoncarew

* Make adding new flags to SparkFlags even easier
* Sequentially read and set flags from:
* `/app.json`
* `/user.json`
* `/.spark.json`
Each of these overrides flags set in the prior ones. `user.json` is mostly for setting `grind deploy`-resilient flags in the working copy of Spark. `/.spark.json` is mostly to allow setting flags for packaged copy of Spark downloaded from CWS (when bootstrapping Spark from Spark or debugging user-reported bugs).