Scalafmt support (#308)

* add scalafmt module, that formats all sources files on every run

* scalafmt worker that internally chaches reformatted files

* move jvm process call to helper method

* use scala 2.12.4 to resolve scalafmt deps; check for config file existence; add quiet flags to scalafmt CLI

* make a scalafmt worker a singleton

* add tests for scalafmt module

* add reformatAll command

* tests for reformatAll command

* add docs about scalafmt support

3 files changed, 20 insertions, 0 deletions

diff --git a/scalalib/test/resources/scalafmt/core/resources/application.conf b/scalalib/test/resources/scalafmt/core/resources/application.conf
new file mode 100644
index 00000000..f5f89257
--- /dev/null
+++ b/scalalib/test/resources/scalafmt/core/resources/application.conf
@@ -0,0 +1 @@
+foo.bar = 2
diff --git a/scalalib/test/resources/scalafmt/core/src/Main.scala b/scalalib/test/resources/scalafmt/core/src/Main.scala
new file mode 100644
index 00000000..a5c74235
--- /dev/null
+++ b/scalalib/test/resources/scalafmt/core/src/Main.scala
@@ -0,0 +1,7 @@
+
+object Main extends App{
+  val person = Person.fromString("rockjam:25")
+  val greeting = s"hello ${person.name}, your age is: ${person.age}"
+  println(greeting)
+}
+
diff --git a/scalalib/test/resources/scalafmt/core/src/Person.scala b/scalalib/test/resources/scalafmt/core/src/Person.scala
new file mode 100644
index 00000000..b296cf85
--- /dev/null
+++ b/scalalib/test/resources/scalafmt/core/src/Person.scala
@@ -0,0 +1,12 @@
+object Person {
+  def fromString(s: String): Person = {
+    val Array(name, age) = s.split(":")
+    Person(
+      name,
+      age.toInt)
+  }
+}
+
+
+
+case class Person(name: String, age: Int)