Support for other Scala versions

[hnoson]

Currently, only Scala 2.11 is supported. It's better to have a parameter to specify the version from config file.

spotless/lib/src/main/java/com/diffplug/spotless/scala/ScalaFmtStep.java

Lines 45 to 46 in 54bd58d

	static final String MAVEN_COORDINATE_PRE_2_0 = "com.geirsson:scalafmt-core_2.11:";
	static final String MAVEN_COORDINATE = "org.scalameta:scalafmt-core_2.11:";

[nedtwigg]

Would be happy to merge and release a PR for this!

Besides the place you pointed out, the other affected locations are:

• https://github.com/diffplug/spotless/blob/master/plugin-gradle/src/main/java/com/diffplug/gradle/spotless/ScalaExtension.java
• https://github.com/diffplug/spotless/blob/master/plugin-maven/src/main/java/com/diffplug/spotless/maven/scala/Scala.java

ScalaFmtStep probably needs to add a versionScala parameter, and ideally that could be autopopulated by the gradle and maven plugins by slurping it from the build context, but it's alright if that's not possible.

[hnoson]

I realized that the version doesn't matter as long as it's used from Java because the version suffix is for binary compatibility. The formatting functionality doesn't change depending on the Scala version. Please close this issue if there is no concern.

[nedtwigg]

Thanks, useful to know!