Externalized "Cannot build..." messages to Messages.properties.

core/src/main/java/hudson/cli/BuildCommand.java

@@ -132,13 +132,13 @@ public class BuildCommand extends CLICommand {
         }
 
         if (!job.isBuildable()) {
-        	String reason = " for unknown reasons";
+        	String msg = Messages.BuildCommand_CLICause_CannotBuildUnknownReasons(job.getFullDisplayName());
             if (job.isDisabled()) {
-            	reason = "because it is disabled";
+            	msg = Messages.BuildCommand_CLICause_CannotBuildDisabled(job.getFullDisplayName());
             } else if (job.isHoldOffBuildUntilSave()){
-            	reason = "because its configuration has not been saved";
+            	msg = Messages.BuildCommand_CLICause_CannotBuildConfigNotSaved(job.getFullDisplayName());
             }
-        	stderr.println("Cannot build "+job.getFullDisplayName()+" " + reason + ".");
+        	stderr.println(msg);
             return 0;
         }
 

core/src/main/resources/hudson/cli/Messages.properties

@@ -57,3 +57,9 @@ UpdateJobCommand.ShortDescription=\
 UpdateNodeCommand.ShortDescription=\
  Updates the node definition XML from stdin. The opposite of the get-node command
 BuildCommand.CLICause.ShortDescription=Started by command line by {0}
+BuildCommand.CLICause.CannotBuildDisabled=\
+Cannot build {0} because it is disabled.
+BuildCommand.CLICause.CannotBuildConfigNotSaved=\
+Cannot build {0} because its configuration has not been saved.
+BuildCommand.CLICause.CannotBuildUnknownReasons=\
+Cannot build {0} for unknown reasons.