correctly propagate isInteractive system property

Author: graemerocher

grails-bootstrap/src/main/groovy/grails/build/logging/GrailsConsole.java

@@ -179,7 +179,7 @@ public void setOut(PrintStream out) {
         this.out = out;
     }
 
-    private boolean isInteractiveEnabled() {
+    public boolean isInteractiveEnabled() {
         return readPropOrTrue(ENABLE_INTERACTIVE);
     }
 

grails-bootstrap/src/main/groovy/org/codehaus/groovy/grails/cli/GrailsScriptRunner.java

@@ -83,9 +83,9 @@ public class GrailsScriptRunner {
     private BuildSettings settings;
 
     private PrintStream out = System.out;
-    private boolean isInteractive = true;
-    private URLClassLoader classLoader;
     private GrailsConsole console = GrailsConsole.getInstance();
+    private boolean isInteractive = console.isInteractiveEnabled();
+    private URLClassLoader classLoader;
 
     private File scriptCacheDir;
     private final List<File> scriptsAllowedOutsideOfProject = new ArrayList<File>();
@@ -338,6 +338,7 @@ public int executeCommand(String scriptName, String args, String env) {
 
         CommandLineParser parser = getCommandLineParser();
         DefaultCommandLine commandLine = (DefaultCommandLine) parser.parseString(scriptName,args);
+        setInteractive(!commandLine.hasOption(CommandLine.NON_INTERACTIVE_ARGUMENT));
         if (env != null) {
             commandLine.setEnvironment(env);
         }

grails-bootstrap/src/main/groovy/org/codehaus/groovy/grails/resolve/PluginInstallEngine.groovy

@@ -58,7 +58,7 @@ class PluginInstallEngine {
      */
     List installedPlugins = []
     def pluginDirVariableStore = [:]
-    boolean isInteractive = true
+    boolean isInteractive = GrailsConsole.getInstance().isInteractiveEnabled()
 
     protected Metadata metadata
     protected PluginBuildSettings pluginSettings