1. Hyphenated labels are still accepted when parsing scoped keys (so 'sbt test-only' still works)
There is currently no timeline for removing this support for hyphenated keys.
2. Only camelCase is shown for tab completion.
3. AttributeKey.rawLabel provides the unnormalized label.
This should only be used to implement support for accepting hyphenated keys as input for compatibility.
4. AttributeKey.normLabel provides the normalized label (hyphenated converted to camelCase)
* split several source files
* move base settings sources (Scope, Structure, ...) into main/settings/
* breaks cycles. In particular, setting system moved from Project to Def
idFun[T]: T => T instead of identity[T](t: T): T
doesn't require a new class file when used as a function value
replaced overloads of :== that assigned the Scoped reference on
the right to the Scoped on the left with <<= scoped.identity
- drop fillThis: handle in injectStreams instead
- simplify InputParser construction (at the expense of implementation simplicity)
- split out ScopeKey/initialization parts of Setting with separate Initialize trait
+ makes Apply obsolete
+ makes the Initialize trait properly composable
+ this allowed splitting the InputParser definition into
an Initialize for parsing and one for the action
- implement test-only
- inject resolved scope
- make all constructing methods end in = for lowest precedence
- rename Scope constructing method 'apply' to 'in' to allow 'apply' to
be used on single settings as well as tuples and 'in' reads better