* Fixes [sbt/sbt#2781]
* When using `<TAB>` completion the failed errors were always
computed for mathcing projects even if there was no failure,
leading to excessive computation of Levenshtein distances
and a large lag (seconds) on builds with many matching
projects.
The compiler interface subclasses `scala.tools.nsc.Global`,
and loading this new subclass before each `compile` task forces
HotSpot JIT to deoptimize larges swathes of compiled code. It's
a bit like SBT has rigged the dice to always descend the longest
ladder in a game of Snakes and Ladders.
The slowdown seems to be larger with Scala 2.12. There are a number
of variables at play, but I think the main factor here is that
we now rely on JIT to devirtualize calls to final methods in traits
whereas we used to emit static calls. JIT does a good job at this,
so long as classloading doesn't undo that good work.
This commit extends the existing `ClassLoaderCache` to encompass
the classloader that includes the compiler interface JAR. I've
resorted to adding a var to `AnalyzingCompiler` to inject the
dependency to get the cache to the spot I need it without binary
incompatible changes to the intervening method signatures.
sbt's shell provided completion only for keys that were relative to a
defined project, but didn't provide completion for keys that belong to
the build definition only.
This commit fixes this issue by defining a new kind of `Parser` (from
which completions are generated) which runs its input simultaneously on
distinct parsers. We now define a parser for project-level keys and
another parser for build-level keys. These two parsers are eventually
combined, and we get the completions of both parsers.
Fixessbt/sbt#2460
It's dangerous, deprecated, and was removed in 2.12.0-M1.
See https://github.com/scala/scala/pull/4140.
`ListBuffer#toList` has equivalent performance,
except it actually returns an immutable copy(-on-write).
When running the 'update' task in bash, the output is all collapsed onto one line.
On Windows, even using an ANSI capable shell, running 'update' spams the console.
Tested with dash in Ubuntu; ANSICON, Console2 and ConsoleZ in Windows.
* Create a new sbt.compiler.javac package
* Create new interfaces to control running `javac` and `javadoc` whether forked or local.
* Ensure new interfaces make use of `xsbti.Reporter`.
* Create new method on `xsbti.compiler.JavaCompiler` which takes a `xsbti.Reporter`
* Create a new mechanism to parse (more accurately) Warnings + Errors, to distinguish the two.
* Ensure older xsbti.Compiler implementations still succeed via catcing NoSuchMethodError.
* Feed new toolchain through sbt.actions.Compiler API via dirty hackery until we can break things in sbt 1.0
* Added a set of unit tests for parsing errors from Javac/Javadoc
* Added a new integration test for hidden compilerReporter key, including testing threading of javac reports.
Fixes#875, Fixes#1542, Related #1178 could be looked into/cleaned up.
eugene yokota
Björn Antonsson
Jason Zaugg
Martin Duhem
Guillaume Martres
Stu Hood
Pierre DAL-PRA
Josh Suereth
Adriaan Moors
David Perez
Vitalii Voloshyn
henry
Indrajit Raychaudhuri
Derek Wickern
Jean-Rémi Desjardins
Grzegorz Kossakowski
Martin Duhem