Adapt mill build to Dotty

Author: anatoliykmetyuk

build.sc

@@ -64,7 +64,8 @@ trait SourcecodeTestModule extends ScalaModule {
 }
 
 object sourcecode extends Module {
-  object jvm extends Cross[JvmSourcecodeModule]("2.11.12", "2.12.8", "2.13.0", "0.21.0-bin-SNAPSHOT")
+  val dottyVersion = Option(sys.props("dottyVersion"))
+  object jvm extends Cross[JvmSourcecodeModule]((List("2.11.12", "2.12.8", "2.13.0") ++ "0.21.0-bin-SNAPSHOT"): _*)
   class JvmSourcecodeModule(val crossScalaVersion: String)
     extends SourcecodeMainModule with ScalaModule with SourcecodeModule {
 

mill

@@ -0,0 +1,37 @@
+#!/usr/bin/env sh
+
+# This is a wrapper script, that automatically download mill from GitHub release pages
+# You can give the required mill version with MILL_VERSION env variable
+# If no version is given, it falls back to the value of DEFAULT_MILL_VERSION
+DEFAULT_MILL_VERSION=0.5.0
+
+set -e
+
+if [ -z "$MILL_VERSION" ] ; then
+  if [ -f ".mill-version" ] ; then
+    MILL_VERSION="$(head -n 1 .mill-version 2> /dev/null)"
+  elif [ -f "mill" ] && [ "$BASH_SOURCE" != "mill" ] ; then
+    MILL_VERSION=$(grep -F "DEFAULT_MILL_VERSION=" "mill" | head -n 1 | cut -d= -f2)
+  else
+    MILL_VERSION=$DEFAULT_MILL_VERSION
+  fi
+fi
+
+MILL_DOWNLOAD_PATH="$HOME/.mill/download"
+MILL_EXEC_PATH="${MILL_DOWNLOAD_PATH}/$MILL_VERSION"
+
+if [ ! -x "$MILL_EXEC_PATH" ] ; then
+  mkdir -p $MILL_DOWNLOAD_PATH
+  DOWNLOAD_FILE=$MILL_EXEC_PATH-tmp-download
+  MILL_DOWNLOAD_URL="https://github.com/lihaoyi/mill/releases/download/${MILL_VERSION%%-*}/$MILL_VERSION-assembly"
+  curl --fail -L -o "$DOWNLOAD_FILE" "$MILL_DOWNLOAD_URL"
+  chmod +x "$DOWNLOAD_FILE"
+  mv "$DOWNLOAD_FILE" "$MILL_EXEC_PATH"
+  unset DOWNLOAD_FILE
+  unset MILL_DOWNLOAD_URL
+fi
+
+unset MILL_DOWNLOAD_PATH
+unset MILL_VERSION
+
+exec $MILL_EXEC_PATH "$@"