Fix Double Elaboration Backportably

Remove the requirement that FirrtlStage runs elaboration (this should
be implicit) and remove the unneeded invalidation of elaboration by
the Emitter. Due to Convert currently NOT invalidating Elaborate (when
it should), add an optionalPrerequisiteOf to ensure that the Emitter
runs before the Convert phase.

Co-authored-by: David Biancolin <david.biancolin@gmail.com>
Co-authored-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

* Update scalatest to 3.1.1

* Update scalatest to 3.1.1

* Update scalatest to 3.1.1

* Add missing org.scalatest.flatspec.AnyFlatSpec import.

Co-authored-by: Scala Steward <me@scala-steward.org>
Co-authored-by: Scala Steward <43047562+scala-steward@users.noreply.github.com>

This replaces the rules for 3.2.x

Co-authored-by: Adam Izraelevitz <azidar@gmail.com>

This reverts commit c279860c.

Co-authored-by: Scala Steward <me@scala-steward.org>

Remove var from object Counter.apply, using a Wire instead. Also improve
some ScalaDoc and the class Counter require message.

Fix bug introduced in #1384

Co-authored-by: Jim Lawson <ucbjrl@berkeley.edu>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Co-authored-by: Jim Lawson <ucbjrl@berkeley.edu>

* Show linking against Javadoc

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

* Add sbt-api-mappings plugin

This adds the sbt-api-mappings plugin which enables
auto-linking (properly setting the apiMappings for the sbt project) so
that Scaldoc/unidoc generation will now automatically link against
Java and Scala API docs (and use the right version).

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

* Show linking against Scala APIs

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Co-authored-by: Jim Lawson <ucbjrl@berkeley.edu>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Co-authored-by: Jim Lawson <ucbjrl@berkeley.edu>

No more compile internal

* Rename coreMacros to macros
* Rename chiselFrontend to core

Also make each subproject publish with "chisel3-" as a prefix

This has the effect of causing the coreMacros and chiselFrontend
projects to be published separately

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Deprecate Driver methods in favor of ChiselStage

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

This adds three new methods to ChiselStage to replace deprecated
methods in the Driver for converting a Chisel circuit to a string:
  - emitChirrtl
  - emitFirrtl
  - emitVerilog

This also adds a ChiselStage companion object that lets you generated
a Chisel Circuit or a FIRRTL Circuit from a Chisel module:
  - elaborate
  - convert

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

squash! Add string emission helper methods to ChiselStage

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

* Remove toNamed (and friends) deprecation.

* Add inadvertently deleted leading double quote.

* Remove commented out deprecations.

Add trait chisel3.experimental.NoChiselNamePrefix which causes
@chiselName to skip naming of the instance effectively preventing it
from prefixing any vals inside the instance. It can be applied to
classes such that all instances of that class have this property, or to
individual instances (via creating an anonymous class inline).

Also add basic ScalaDoc for NoChiselNamePrefix and chiselName.

Change the logic for determining which nested ChiselException cause to
use for a trimmed stack trace. Previously, this would use the
outermost. This commit changes this to use the innermost.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Don't wrap elaboration annotations

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Change ChiselException.builderName to compute the name of Chisel's
internal Builder as opposed to hard-coding this with a string.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Co-authored-by: Jack Koenig <koenig@sifive.com>
Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>