Use a dedicated tmp directory per build when publishing

Otherwise two concurrent product builds would simply stomp on each
others' feet in that tmp directory.

Change-Id: I3b711ce87aa19c380bd2704598b8f3501caab9bd
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
diff --git a/src/org/eclipse/egit/jenkins/Tools.groovy b/src/org/eclipse/egit/jenkins/Tools.groovy
index 6f3861e..dac863e 100644
--- a/src/org/eclipse/egit/jenkins/Tools.groovy
+++ b/src/org/eclipse/egit/jenkins/Tools.groovy
@@ -106,25 +106,26 @@
 	 * 		to also copy to {@code publishDirectory}
 	 */
 	def void publishUpdateSite(String genie, String credentials, String sourceDirectory, String publishDirectory, String extraSource = null) {
+		def buildNumber = script.currentBuild.number;
 		script.sshagent ([credentials]) {
 			script.sh """
-					ssh ${genie}@projects-storage.eclipse.org rm -rf ${publishDirectory}-tmp
-					ssh ${genie}@projects-storage.eclipse.org mkdir -p ${publishDirectory}-tmp
-					scp -r ${sourceDirectory}/* ${genie}@projects-storage.eclipse.org:${publishDirectory}-tmp
+					ssh ${genie}@projects-storage.eclipse.org rm -rf ${publishDirectory}-tmp${buildNumber}
+					ssh ${genie}@projects-storage.eclipse.org mkdir -p ${publishDirectory}-tmp${buildNumber}
+					scp -r ${sourceDirectory}/* ${genie}@projects-storage.eclipse.org:${publishDirectory}-tmp${buildNumber}
 				"""
 			if (extraSource) {
 				script.sh """
-					scp ${extraSource} ${genie}@projects-storage.eclipse.org:${publishDirectory}-tmp/
+					scp ${extraSource} ${genie}@projects-storage.eclipse.org:${publishDirectory}-tmp${buildNumber}/
 				"""
 			}
 			// Remove former -old directory. There shouldn't be one, but let's be sure.
 			// Ensure the publishDirectory exists before moving it to -old.
-			// Then remane -tmp and remove -old.
+			// Then rename -tmp and remove -old.
 			script.sh """
 					ssh ${genie}@projects-storage.eclipse.org rm -rf ${publishDirectory}-old
 					ssh ${genie}@projects-storage.eclipse.org mkdir -p ${publishDirectory}
 					ssh ${genie}@projects-storage.eclipse.org mv ${publishDirectory} ${publishDirectory}-old
-					ssh ${genie}@projects-storage.eclipse.org mv ${publishDirectory}-tmp ${publishDirectory}
+					ssh ${genie}@projects-storage.eclipse.org mv ${publishDirectory}-tmp${buildNumber} ${publishDirectory}
 					ssh ${genie}@projects-storage.eclipse.org rm -rf ${publishDirectory}-old
 				"""
 		}