check for empty strings

Signed-off-by: Sally MacFarlane <[email protected]>

Author: macfarla

build.gradle

@@ -800,12 +800,10 @@ artifactoryPublish {
   dependsOn distZip
 }
 
-def dockerBuildVersion = project.hasProperty('release.releaseVersion') ? project.property('release.releaseVersion') : "${rootProject.version}"
-def dockerOrgName = project.hasProperty('dockerOrgName') ? project.getProperty("dockerOrgName") : "hyperledger"
-def dockerArtifactName = project.hasProperty("dockerArtifactName") ? project.getProperty("dockerArtifactName") : "besu"
-def dockerImageName = "hyperledger/besu" // TODO this is a tmp hack to see if something works
-//def dockerImageName = "${dockerOrgName}/${dockerArtifactName}"
-
+def dockerBuildVersion = project.hasProperty('release.releaseVersion') && project.property('release.releaseVersion') ? project.property('release.releaseVersion') : "${rootProject.version}"
+def dockerOrgName = project.hasProperty('dockerOrgName') && project.property('dockerOrgName') ? project.getProperty("dockerOrgName") : "hyperledger"
+def dockerArtifactName = project.hasProperty("dockerArtifactName") && project.property("dockerArtifactName") ? project.getProperty("dockerArtifactName") : "besu"
+def dockerImageName = "${dockerOrgName}/${dockerArtifactName}"
 
 // rename the top level dir from besu-<version> to besu and this makes it really
 // simple for use in docker