Check for empty value of exclusion options and only enable if non empty

Author: Tim Sheppard

build.sbt

@@ -2,7 +2,7 @@ name := "sbt-scoverage"
 
 organization := "org.scoverage"
 
-version := "0.99.10"
+version := "0.99.11-SNAPSHOT"
 
 scalaVersion := "2.10.4"
 

src/main/scala/scoverage/ScoverageSbtPlugin.scala

@@ -85,8 +85,14 @@ class ScoverageSbtPlugin extends sbt.Plugin {
                 s"-Xplugin:${classpath.getAbsolutePath}",
                 s"-P:scoverage:dataDir:${crossTarget.value.getAbsolutePath}/scoverage-data"
               ) ++
-                Option(excludedPackages.value).map(v => s"-P:scoverage:excludedPackages:$v") ++
-                Option(scoverageExcludedFiles.value).map(v => s"-P:scoverage:excludedFiles:$v")
+                Option(excludedPackages.value.trim).map{
+                  case "" => ""
+                  case v => s"-P:scoverage:excludedPackages:$v"
+                } ++
+                Option(scoverageExcludedFiles.value.trim).map{
+                  case "" => ""
+                  case v => s"-P:scoverage:excludedFiles:$v"
+                }
           }
         },
 
@@ -436,4 +442,4 @@ class ScoverageSbtPlugin extends sbt.Plugin {
 //  //        test in ScoverageCompile <<= (test in ScoverageTest)
 //  //      )
 //
-//}
+//}