detect if we are using application.yml vs groovy and inject spring configuration in the yml instead

plugin-core/plugin/grails-app/commands/grails.plugin.springsecurity/S2QuickstartCommand.groovy

diff --git a/plugin-core/plugin/grails-app/commands/grails.plugin.springsecurity/S2QuickstartCommand.groovy b/plugin-core/plugin/grails-app/commands/grails.plugin.springsecurity/S2QuickstartCommand.groovy
index 79b9a85..b1c2a93 100644
--- a/plugin-core/plugin/grails-app/commands/grails.plugin.springsecurity/S2QuickstartCommand.groovy
+++ b/plugin-core/plugin/grails-app/commands/grails.plugin.springsecurity/S2QuickstartCommand.groovy
@@ -77,8 +77,12 @@
             initializeTemplateAttributes()
             createDomains(userModel, roleModel, requestmapModel, roleGroupModel)
         }
-
-        updateConfig(userModel?.simpleName, roleModel?.simpleName, requestmapModel?.simpleName, userModel?.packageName, roleGroupModel != null)
+        if (new File('grails-app/conf/application.yml').exists()) {
+            consoleLogger.addStatus('\nConfiguring Spring Security; Updating YAML Application Config')
+            updateYmlConfig(userModel?.simpleName, roleModel?.simpleName, requestmapModel?.simpleName, userModel?.packageName, roleGroupModel != null)
+        } else {
+            updateConfig(userModel?.simpleName, roleModel?.simpleName, requestmapModel?.simpleName, userModel?.packageName, roleGroupModel != null)
+        }
         logStatus()
         return SUCCESS
     }
@@ -276,6 +280,79 @@
         }
     }
 
+    private void updateYmlConfig(String userClassName, String roleClassName, String requestmapClassName, String packageName, boolean useRoleGroups) {
+        //I mean, we could use SNAKE YAML TO GENERATE THIS BUT I DIGRESS
+        file('grails-app/conf/application.yml').withWriterAppend { BufferedWriter writer ->
+            writer.newLine()
+            writer.writeLine('---')
+            writer.writeLine('# Added by the Spring Security Core plugin:')
+            writer.writeLine('grails:')
+            writer.writeLine('    plugin:')
+            writer.writeLine('        springsecurity:')
+            if (!uiOnly) {
+                writer.writeLine('            userLookup:')
+                writer.writeLine("                userDomainClassName: '${packageName}.$userClassName'")
+                writer.writeLine("                authorityJoinClassName: '${packageName}.$userClassName$roleClassName'")
+            }
+            if(!uiOnly || useRoleGroups) {
+                writer.writeLine('        authority:')
+                if(!uiOnly) {
+                    writer.writeLine("            className: '${packageName}.$roleClassName'")
+                }
+                if(useRoleGroups) {
+                    writer.writeLine("            groupAuthorityNameField: authorities")
+                }
+            }
+
+            if (useRoleGroups) {
+                writer.writeLine('        useRoleGroups: true')
+            }
+            if (requestmapClassName) {
+                writer.writeLine("            requestMap.className: '${packageName}.$requestmapClassName'")
+                writer.writeLine("            securityConfigType: Requestmap")
+            }
+            writer.writeLine('            controllerAnnotations:')
+            writer.writeLine('                staticRules:')
+            writer.writeLine('                    - pattern: /')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /error')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /index')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /index.gsp')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /shutdown')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /assets/**')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /**/js/**')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /**/css/**')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /**/images/**')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.writeLine('                    - pattern: /**/favicon.ico')
+            writer.writeLine('                      access: [\'permitAll\']')
+            writer.newLine()
+
+            writer.writeLine('            filterChain:')
+            writer.writeLine('                chainMap:')
+            writer.writeLine('                    - pattern: /assets/**')
+            writer.writeLine('                      filters: none')
+            writer.writeLine('                    - pattern: /**/js/**')
+            writer.writeLine('                      filters: none')
+            writer.writeLine('                    - pattern: /**/css/**')
+            writer.writeLine('                      filters: none')
+            writer.writeLine('                    - pattern: /**/images/**')
+            writer.writeLine('                      filters: none')
+            writer.writeLine('                    - pattern: /**/favicon.ico')
+            writer.writeLine('                      filters: none')
+            writer.writeLine('                    - pattern: /**')
+            writer.writeLine('                      filters: JOINED_FILTERS')
+            writer.newLine()
+        }
+    }
+
     private void generateFile(String templateName, String packagePath, String className, String fileName = null, String folder = 'grails-app/domain') {
         render template(templateName + '.groovy.template'),
                 file("${folder}/$packagePath/${fileName ?: className}.groovy"),