Google Java Format plugin

3 files changed, 48 insertions, 0 deletions

diff --git a/plugins/google-java-format/GoogleJavaFormat.scala b/plugins/google-java-format/GoogleJavaFormat.scala
new file mode 100644
index 0000000..cbccb94
--- /dev/null
+++ b/plugins/google-java-format/GoogleJavaFormat.scala
@@ -0,0 +1,34 @@
+package cbt
+
+import java.io.File
+import java.nio.file.Files._
+import java.nio.file._
+
+import com.google.googlejavaformat.java._
+
+trait GoogleJavaFormat extends BaseBuild {
+  def googleJavaFormat() = GoogleJavaFormat.apply( lib, sourceFiles.filter(_.string endsWith ".java") ).format
+}
+
+object GoogleJavaFormat{
+  case class apply( lib: Lib, files: Seq[File] ){
+    /** @param whiteSpaceInParenthesis more of a hack to make up for missing support in Scalafmt. Does not respect alignment and maxColumn. */
+    def format = {
+      val (successes, errors) = lib.transformFilesOrError( files, in =>
+        try{
+          Right( new Formatter().formatSource(in) )
+        } catch {
+          case e: FormatterException => Left( e )
+        }
+      )
+      if(errors.nonEmpty)
+        throw new RuntimeException(
+          "Google Java Format failed to parse some files:\n" ++ errors.map{
+            case (file, error) => file.string ++ ":" ++ error.toString
+          }.mkString("\n"),
+          errors.head._2
+        )
+      successes
+    }
+  }
+}
diff --git a/plugins/google-java-format/Immutable.java b/plugins/google-java-format/Immutable.java
new file mode 100644
index 0000000..5b3ff44
--- /dev/null
+++ b/plugins/google-java-format/Immutable.java
@@ -0,0 +1,5 @@
+package com.google.errorprone.annotations;
+// to suppress warning
+// "Class com.google.errorprone.annotations.Immutable not found - continuing with a stub."
+// there probably is a better solution
+public class Immutable{}
diff --git a/plugins/google-java-format/build/build.scala b/plugins/google-java-format/build/build.scala
new file mode 100644
index 0000000..50bc423
--- /dev/null
+++ b/plugins/google-java-format/build/build.scala
@@ -0,0 +1,9 @@
+import cbt._
+
+class Build(val context: Context) extends Plugin {
+  override def dependencies =
+    super.dependencies ++
+    Resolver( mavenCentral ).bind(
+      MavenDependency( "com.google.googlejavaformat", "google-java-format", "1.3" )
+    )
+}