use technique documented at http://maven.apache.org/plugins/maven-che…

…ckstyle-plugin/examples/multi-module-config.html to enable shared checkstyle config among modules

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/proxy/branches/version-2.0-work@967239 13f79535-47bb-0310-9956-ffa450edef68

build-tools/pom.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+    <!--
+        ~ Licensed to the Apache Software Foundation (ASF) under one or more ~
+        contributor license agreements. See the NOTICE file distributed with ~
+        this work for additional information regarding copyright ownership. ~
+        The ASF licenses this file to You under the Apache License, Version
+        2.0 ~ (the "License"); you may not use this file except in compliance
+        with ~ the License. You may obtain a copy of the License at ~ ~
+        http://www.apache.org/licenses/LICENSE-2.0 ~ ~ Unless required by
+        applicable law or agreed to in writing, software ~ distributed under
+        the License is distributed on an "AS IS" BASIS, ~ WITHOUT WARRANTIES
+        OR CONDITIONS OF ANY KIND, either express or implied. ~ See the
+        License for the specific language governing permissions and ~
+        limitations under the License.
+    -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>org.apache</groupId>
+        <artifactId>apache</artifactId>
+        <version>7</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.apache.commons</groupId>
+    <artifactId>commons-proxy-build-tools</artifactId>
+    <version>2.0-SNAPSHOT</version>
+    <name>Commons Proxy Build Tools</name>
+    <description>Provide common setup, from http://maven.apache.org/plugins/maven-checkstyle-plugin/examples/multi-module-config.html</description>
+</project>

build-tools/src/main/resources/org/apache/commons/proxy2/checkstyle.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0"?>
+
+<!--
+  ~ Licensed to the Apache Software Foundation (ASF) under one or more
+  ~ contributor license agreements.  See the NOTICE file distributed with
+  ~ this work for additional information regarding copyright ownership.
+  ~ The ASF licenses this file to You under the Apache License, Version 2.0
+  ~ (the "License"); you may not use this file except in compliance with
+  ~ the License.  You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->     
+<!DOCTYPE module PUBLIC
+    "-//Puppy Crawl//DTD Check Configuration 1.1//EN"
+    "http://www.puppycrawl.com/dtds/configuration_1_1.dtd">
+
+<!-- commons proxy2 customization of default Checkstyle behavior -->
+<module name="Checker">
+  <property name="localeLanguage" value="en"/>
+
+  <module name="Header">
+    <property name="headerFile" value="license-header.txt"/>
+  </module>
+
+  <!-- no tabs allowed in files -->
+  <module name="FileTabCharacter"/>
+
+  <module name="TreeWalker">
+    <!-- Verify that EVERY source file has the appropriate license -->
+    <!-- check sane import statements -->
+    <module name="AvoidStarImport"/>
+    <module name="RedundantImport"/>
+    <module name="UnusedImports"/>
+
+    <module name="LineLength">
+      <property name="max" value="120"/>
+    </module>
+  </module>
+</module>

pom.xml

@@ -21,7 +21,7 @@
     <modelVersion>4.0.0</modelVersion>
     <packaging>pom</packaging>
     <modules>
-
+        <module>build-tools</module>
         <module>core</module>
         <module>jdk</module>
         <module>javassist</module>
@@ -134,6 +134,17 @@
                     <tarLongFileMode>gnu</tarLongFileMode>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-checkstyle-plugin</artifactId>
+                <dependencies>
+                    <dependency>
+                        <groupId>${project.groupId}</groupId>
+                        <artifactId>commons-proxy-build-tools</artifactId>
+                        <version>${project.version}</version>
+                    </dependency>
+                </dependencies>
+            </plugin>
         </plugins>
     </build>
 
@@ -143,7 +154,7 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-checkstyle-plugin</artifactId>
                 <configuration>
-                    <configLocation>${basedir}/checkstyle.xml</configLocation>
+                    <configLocation>org/apache/commons/proxy2/checkstyle.xml</configLocation>
                 </configuration>
             </plugin>
             <plugin>