configure action to use custom properties file

.github/workflows/checkstyle.yml

@@ -12,3 +12,5 @@ jobs:
         with:
           github_token: ${{ secrets.github_token }}
           reporter: github-pr-review
+          checkstyle_config: ./properties_file/test_checks.xml
+          properties_file: ./properties_file/additional.properties

properties_file/additional.properties

@@ -0,0 +1 @@
+max-line-length=50

properties_file/test_checks.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC
+  "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
+  "https://checkstyle.org/dtds/configuration_1_3.dtd">
+
+<module name="Checker">
+  <property name="charset" value="UTF-8"/>
+  <property name="severity" value="warning"/>
+  <property name="fileExtensions" value="java, properties, xml"/>
+
+  <module name="LineLength">
+    <property name="fileExtensions" value="java"/>
+    <property name="max" value="${max-line-length}"/><!-- value from additional property defined in a separate property file, should be resolved -->
+  </module>
+</module>

src/main/Application.java

@@ -0,0 +1,45 @@
+import java.util.Arrays;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+
+@SpringBootApplication
+public class Application {
+
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+
+    private void DoReallyNothing() {
+        try {
+            var counter = 100;
+
+        } catch (Exception e) {
+
+        }
+    }
+
+    /**
+     * some java doc.
+     *
+     * @param ctx application contexxt
+     * @return some return
+     */
+    @Bean
+    public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
+        return args -> {
+            System.out.println("Let's inspect the beans provided by Spring Boot:");
+
+            var LongString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Porta lorem";
+
+            String[] beanNames = ctx.getBeanDefinitionNames();
+            Arrays.sort(beanNames);
+            for (String beanName : beanNames) {
+                System.out.println(beanName);
+            }
+        };
+    }
+
+}