Add scalafmt config, SBT plugin, and mill support

Can be run in two ways:
* sbt scalaFmtAll
* mill mill.scalalib.scalafmt.ScalafmtModule/reformatAll __.sources

1 files changed, 26 insertions, 0 deletions

diff --git a/.scalafmt.conf b/.scalafmt.conf
new file mode 100644
index 00000000..f74e5504
--- /dev/null
+++ b/.scalafmt.conf
@@ -0,0 +1,26 @@
+version = 2.6.4
+
+maxColumn = 120
+align = most
+continuationIndent.defnSite = 2
+assumeStandardLibraryStripMargin = true
+docstrings = ScalaDoc
+lineEndings = preserve
+includeCurlyBraceInSelectChains = false
+danglingParentheses = true
+
+align.tokens.add = [
+  {
+    code = ":"
+  }
+]
+
+newlines.alwaysBeforeCurlyBraceLambdaParams = false
+newlines.alwaysBeforeMultilineDef = false
+newlines.implicitParamListModifierForce = [before]
+
+verticalMultiline.atDefnSite = true
+
+optIn.annotationNewlines = true
+
+rewrite.rules = [SortImports, PreferCurlyFors, AvoidInfix]