[MENFORCER-460] Deprecate display-info mojo

enforcer-rules/src/main/java/org/apache/maven/enforcer/rules/RequireOS.java

@@ -97,7 +97,7 @@ public void execute() throws EnforcerRuleException {
         if (allParamsEmpty()) {
             throw new EnforcerRuleError("All parameters can not be empty. "
                     + "You must pick at least one of (family, name, version, arch), "
-                    + "you can use mvn enforcer:display-info to see the current OS information.");
+                    + "you can use mvn --version to see the current OS information.");
         }
 
         if (isValidFamily(this.family)) {

enforcer-rules/src/main/java/org/apache/maven/enforcer/rules/version/AbstractVersionEnforcer.java

@@ -138,9 +138,4 @@ public final String getVersion() {
     public void setVersion(String theVersion) {
         this.version = theVersion;
     }
-
-    @Override
-    public String toString() {
-        return String.format("%s[message=%s, version=%s]", getClass().getSimpleName(), getMessage(), version);
-    }
 }

enforcer-rules/src/main/java/org/apache/maven/enforcer/rules/version/RequireJavaVersion.java

@@ -44,6 +44,11 @@ public final class RequireJavaVersion extends AbstractVersionEnforcer {
 
     private static final Pattern JDK8_VERSION_PATTERN = Pattern.compile("([\\[(,]?)(1\\.8|8)([]),]?)");
 
+    /**
+     * Display the normalized JDK version.
+     */
+    private boolean display = false;
+
     @Override
     public void setVersion(String theVersion) {
 
@@ -66,12 +71,16 @@ public void setVersion(String theVersion) {
     @Override
     public void execute() throws EnforcerRuleException {
         String javaVersion = SystemUtils.JAVA_VERSION;
+        String javaVersionNormalized = normalizeJDKVersion(javaVersion);
+        if (display) {
+            getLog().info("Detected Java Version: '" + javaVersion + "'");
+            getLog().info("Normalized Java Version: '" + javaVersionNormalized + "'");
+        } else {
+            getLog().debug("Detected Java Version: '" + javaVersion + "'");
+            getLog().debug("Normalized Java Version: '" + javaVersionNormalized + "'");
+        }
 
-        getLog().debug("Detected Java String: '" + javaVersion + "'");
-        javaVersion = normalizeJDKVersion(javaVersion);
-        getLog().debug("Normalized Java String: '" + javaVersion + "'");
-
-        ArtifactVersion detectedJdkVersion = new DefaultArtifactVersion(javaVersion);
+        ArtifactVersion detectedJdkVersion = new DefaultArtifactVersion(javaVersionNormalized);
 
         getLog().debug("Parsed Version: Major: " + detectedJdkVersion.getMajorVersion() + " Minor: "
                 + detectedJdkVersion.getMinorVersion() + " Incremental: " + detectedJdkVersion.getIncrementalVersion()
@@ -133,4 +142,11 @@ private void setCustomMessageIfNoneConfigured(ArtifactVersion detectedJdkVersion
             super.setMessage(message);
         }
     }
+
+    @Override
+    public String toString() {
+        return String.format(
+                "%s[message=%s, version=%s, display=%b]",
+                getClass().getSimpleName(), getMessage(), getVersion(), display);
+    }
 }

enforcer-rules/src/main/java/org/apache/maven/enforcer/rules/version/RequireMavenVersion.java

@@ -52,4 +52,9 @@ public void execute() throws EnforcerRuleException {
         DefaultArtifactVersion detectedVersion = new DefaultArtifactVersion(mavenVersion);
         enforceVersion("Maven", getVersion(), detectedVersion);
     }
+
+    @Override
+    public String toString() {
+        return String.format("%s[message=%s, version=%s]", getClass().getSimpleName(), getMessage(), getVersion());
+    }
 }

enforcer-rules/src/site/apt/requireJavaVersion.apt.vm

@@ -33,6 +33,9 @@ Require Java Version
 
    * <<version>> - {{{./versionRanges.html}range}} of allowed JDKs.
 
+   * <<display>> -  flag to display the normalized JDK version.
+
+
    For JDK 1.8 you can also use simple <<<8>>> as <version> - it will be internally changed to <<<1.8>>>
 
    []
@@ -49,18 +52,10 @@ Require Java Version
 
   []
 
-   This preprocessing normalizes various JDK version strings into a standard x.y.z-b version number. Your required range should therefore use the x.y.z-b format for comparison. 
-   There is an easy way to see how your current JDK string will be normalized:
-
-+---+
-mvn enforcer:display-info
-...
-[INFO] Maven Version: 3.8.7
-[INFO] JDK Version: 1.8.0_352 normalized as: 1.8.0-352
-[INFO] Java Vendor: Homebrew
-[INFO] OS Info - Arch: x86_64, Family: mac, Name: mac os x, Version: 12.6.1
-+---+
-
+   This preprocessing normalizes various JDK version strings into a standard x.y.z-b version number.
+   Your required range should therefore use the x.y.z-b format for comparison.
+   There is an easy way to see how your current JDK string will be normalized, you can enable <<display>> option.
+
    Sample Plugin Configuration:
 
 +---+

enforcer-rules/src/site/apt/requireOS.apt.vm

@@ -89,12 +89,13 @@ Require OS Version
    information for the current system:
 
 +---+
-mvn enforcer:display-info
-...
-[INFO] Maven Version: 3.8.7
-[INFO] JDK Version: 1.8.0_352 normalized as: 1.8.0-352
-[INFO] Java Vendor: Homebrew
-[INFO] OS Info - Arch: x86_64, Family: mac, Name: mac os x, Version: 12.6.1
+mvn --version
+
+Apache Maven 3.8.7 (b89d5959fcde851dcb1c8946a785a163f14e1e29)
+Maven home: /usr/local/Cellar/maven/3.8.7/libexec
+Java version: 1.8.0_352, vendor: Homebrew, runtime: /usr/local/Cellar/openjdk@8/1.8.0+352/libexec/openjdk.jdk/Contents/Home/jre
+Default locale: en_GB, platform encoding: UTF-8
+OS name: "mac os x", version: "12.6.1", arch: "x86_64", family: "mac"
 +---+
 
   Sample Plugin Configuration:

maven-enforcer-plugin/src/main/java/org/apache/maven/plugins/enforcer/DisplayInfoMojo.java

@@ -29,7 +29,9 @@
  * This goal displays the current platform information.
  *
  * @author <a href="mailto:brianf@apache.org">Brian Fox</a>
+ * @deprecated please use {@code mvn --version}
  */
+@Deprecated
 @Mojo(name = "display-info", threadSafe = true)
 public class DisplayInfoMojo extends AbstractMojo {
 

maven-enforcer-plugin/src/site/apt/index.apt

@@ -28,14 +28,12 @@ Maven Enforcer Plugin - The Loving Iron Fist of Maven\x99
   The Enforcer plugin provides goals to control certain environmental constraints such as Maven version, JDK version and OS family
   along with many more built-in rules and user created rules.
 
-* Goals Overview
+* Goal Overview
 
-  The Enforcer plugin has two goals:
+  The Enforcer plugin has a goal:
 
   *{{{./enforce-mojo.html}enforcer:enforce}} executes rules for each project in a multi-project build.
 
-  *{{{./display-info-mojo.html}enforcer:display-info}} display the current information as detected by the built-in rules.
-
 * Usage
 
   General instructions on how to use the Enforcer Plugin can be found on the {{{./usage.html}usage page}}.

maven-enforcer-plugin/src/site/apt/usage.apt.vm

@@ -105,17 +105,4 @@ Usage
   [...]
 </project>
 +---+
-
-* The <<<enforcer:display-info>>> mojo
 
-   This goal is used to determine the current information as detected by the standard rules:
-
-+---+
-   mvn enforcer:display-info
-   ...
-   [enforcer:display-info]
-       Maven Version: 2.0.6
-       JDK Version: 1.5.0_11 normalized as: 1.5.0-11
-       OS Info: Arch: x86 Family: windows Name: windows xp Version: 5.1
-+---+
-