enable pylint

fixes #2440

Author: Vladimir Kotal

opengrok-tools/pom.xml

@@ -124,6 +124,7 @@ Portions Copyright (c) 2017-2018, Chris Fraire <[email protected]>.
                 <version>1.6.0</version>
                 <executions>
                     <execution>
+                        <id>Python flake8</id>
                         <configuration>
                             <executable>flake8</executable>
                             <arguments>
@@ -138,6 +139,20 @@ Portions Copyright (c) 2017-2018, Chris Fraire <[email protected]>.
                             <goal>exec</goal>
                         </goals>
                     </execution>
+                    <execution>
+                        <id>Python lint</id>
+                        <configuration>
+                            <executable>pylint</executable>
+                            <arguments>
+                                <argument>-E</argument>
+                                <argument>${project.build.sourceDirectory}/opengrok_tools</argument>
+                            </arguments>
+                        </configuration>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>exec</goal>
+                        </goals>
+                    </execution>
                     <execution>
                         <id>generate python env</id>
                         <configuration>