Get current project root directory

Author: AnghelLeonard

Chapter06/BONUS_1_GetCurrentProjectRootDirectory/README.md

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+# Converting `Date` to `YearMonth`
+Write a program that converts an `Date` to `YearMonth` and vice-versa. 

Chapter06/BONUS_1_GetCurrentProjectRootDirectory/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.app</groupId>
+    <artifactId>BONUS_1_GetCurrentProjectRootDirectory</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>13</maven.compiler.source>
+        <maven.compiler.target>13</maven.compiler.target>
+    </properties>
+    <name>BONUS_1_GetCurrentProjectRootDirectory</name>
+</project>

Chapter06/BONUS_1_GetCurrentProjectRootDirectory/src/main/java/modern/challenge/MainApplication.java

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+package modern.challenge;
+
+public class MainApplication {
+
+    public static void main(String[] args) {
+
+        System.out.println("The root directory of this project is:\n"
+                + Roots.getCurrentProjectRootDirectory());
+    }
+}

Chapter06/BONUS_1_GetCurrentProjectRootDirectory/src/main/java/modern/challenge/Roots.java

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+package modern.challenge;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+public class Roots {
+
+    private Roots() {
+        throw new AssertionError("Cannot be instantiatied");
+    }
+
+    public static String getCurrentProjectRootDirectory() {
+
+        String userDirectory = System.getProperty("user.dir");
+        Path rootDirectory = Paths.get(".").normalize().toAbsolutePath();
+
+        if (rootDirectory.startsWith(userDirectory)) {
+            return rootDirectory.toString();
+        } else {
+            throw new RuntimeException("Cannot find the current project root directory");
+        }
+    }
+}