Remove JANSI dependency in 2.x

This commit:

- Removes support for the outdated [Jansi 1.x](http://fusesource.github.io/jansi/) version in `Console` appender.
- Rewrites `JAnsiTextRenderer`, use in the `%m{ansi}` and `%ex{ansi}` pattern converters to use our internal ANSI support instead of Jansi.

Fixes #1736.

Author: ppkarwasz

log4j-core-test/pom.xml

@@ -242,13 +242,6 @@
       <scope>test</scope>
     </dependency>
 
-    <!-- Required for console color support in Windows -->
-    <dependency>
-      <groupId>org.fusesource.jansi</groupId>
-      <artifactId>jansi</artifactId>
-      <scope>test</scope>
-    </dependency>
-
     <!-- Used for JMS appenders (needs an implementation of course) -->
     <dependency>
       <groupId>javax.jms</groupId>

log4j-core-test/src/main/java/org/apache/logging/log4j/core/test/categories/Layouts.java

@@ -22,8 +22,6 @@
 public interface Layouts {
     interface Csv {}
 
-    interface Jansi {}
-
     interface Json {}
 
     interface Xml {}

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiMessagesMain.java

@@ -30,16 +30,15 @@
  * </p>
  *
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%HOME%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiMessagesMain log4j-core/target/test-classes/log4j2-console.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiMessagesMain log4j-core/target/test-classes/log4j2-console.xml
  * </pre>
  */
 public class ConsoleAppenderAnsiMessagesMain {
 
     private static final Logger LOG = LogManager.getLogger(ConsoleAppenderAnsiMessagesMain.class);
 
     public static void main(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        try (final LoggerContext ctx = Configurator.initialize(
+        try (final LoggerContext ignored = Configurator.initialize(
                 ConsoleAppenderAnsiMessagesMain.class.getName(), "target/test-classes/log4j2-console.xml")) {
             LOG.fatal("\u001b[1;35mFatal message.\u001b[0m");
             LOG.error("\u001b[1;31mError message.\u001b[0m");

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiStyleJira180Main.java

@@ -23,24 +23,22 @@
 import org.apache.logging.log4j.core.config.Configurator;
 
 /**
- * Tests https://issues.apache.org/jira/browse/LOG4J2-180
+ * Tests <a href="https://issues.apache.org/jira/browse/LOG4J2-180">LOG4J2-180</a>
  * <p>
  * Running from a Windows command line from the root of the project:
  * </p>
  *
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%HOME%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira180Main log4j-core/target/test-classes/log4j2-180.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira180Main log4j-core/target/test-classes/log4j2-180.xml
  * </pre>
  */
 public class ConsoleAppenderAnsiStyleJira180Main {
 
     private static final Logger LOG = LogManager.getLogger(ConsoleAppenderAnsiStyleJira180Main.class);
 
     public static void main(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        // System.out.println(System.getProperty("java.class.path"));
         final String config = args.length == 0 ? "target/test-classes/log4j2-180.xml" : args[0];
-        try (final LoggerContext ctx =
+        try (final LoggerContext ignored =
                 Configurator.initialize(ConsoleAppenderAnsiMessagesMain.class.getName(), config)) {
             LOG.fatal("Fatal message.");
             LOG.error("Error message.");

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiStyleJira272Main.java

@@ -23,23 +23,21 @@
 import org.apache.logging.log4j.core.config.Configurator;
 
 /**
- * Tests https://issues.apache.org/jira/browse/LOG4J2-272
+ * Tests <a href="https://issues.apache.org/jira/browse/LOG4J2-272">LOG4J2-272</a>
  * <p>
  * Running from a Windows command line from the root of the project:
  * </p>
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%HOME%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira272Main log4j-core/target/test-classes/log4j2-272.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira272Main log4j-core/target/test-classes/log4j2-272.xml
  * </pre>
  */
 public class ConsoleAppenderAnsiStyleJira272Main {
 
     private static final Logger LOG = LogManager.getLogger(ConsoleAppenderAnsiStyleJira272Main.class);
 
     public static void main(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        // System.out.println(System.getProperty("java.class.path"));
         final String config = args.length == 0 ? "target/test-classes/log4j2-272.xml" : args[0];
-        try (final LoggerContext ctx =
+        try (final LoggerContext ignored =
                 Configurator.initialize(ConsoleAppenderAnsiMessagesMain.class.getName(), config)) {
             LOG.fatal("Fatal message.");
             LOG.error("Error message.");

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiStyleJira319Main.java

@@ -23,24 +23,22 @@
 import org.apache.logging.log4j.core.config.Configurator;
 
 /**
- * Tests https://issues.apache.org/jira/browse/LOG4J2-319
+ * Tests <a href="https://issues.apache.org/jira/browse/LOG4J2-319">LOG4J2-319</a>
  * <p>
  * Running from a Windows command line from the root of the project:
  * </p>
  *
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%HOME%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira319Main log4j-core/target/test-classes/log4j2-319.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleJira319Main log4j-core/target/test-classes/log4j2-319.xml
  * </pre>
  */
 public class ConsoleAppenderAnsiStyleJira319Main {
 
     private static final Logger LOG = LogManager.getLogger(ConsoleAppenderAnsiStyleJira319Main.class);
 
     public static void main(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        // System.out.println(System.getProperty("java.class.path"));
         final String config = args.length == 0 ? "target/test-classes/log4j2-319.xml" : args[0];
-        try (final LoggerContext ctx =
+        try (final LoggerContext ignored =
                 Configurator.initialize(ConsoleAppenderAnsiMessagesMain.class.getName(), config)) {
             LOG.fatal("Fatal message.");
             LOG.error("Error message.");

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiStyleLayoutMain.java

@@ -35,7 +35,7 @@
  * </pre>
  * or:
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%HOME%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleLayoutMain log4j-core/target/test-classes/log4j2-console-style-ansi.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiStyleLayoutMain log4j-core/target/test-classes/log4j2-console-style-ansi.xml
  * </pre>
  *
  */
@@ -54,11 +54,9 @@ public void test() {
     }
 
     public void test(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        // System.out.println(System.getProperty("java.class.path"));
         final String config =
                 args == null || args.length == 0 ? "target/test-classes/log4j2-console-style-ansi.xml" : args[0];
-        try (final LoggerContext ctx =
+        try (final LoggerContext ignored =
                 Configurator.initialize(ConsoleAppenderAnsiMessagesMain.class.getName(), config)) {
             final Logger logger = LogManager.getLogger(ConsoleAppenderAnsiStyleLayoutMain.class);
             logger.fatal("Fatal message.");

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiStyleNameLayoutMain.java

@@ -31,8 +31,7 @@ public class ConsoleAppenderAnsiStyleNameLayoutMain {
     private static final Logger LOG = LogManager.getLogger(ConsoleAppenderAnsiStyleNameLayoutMain.class);
 
     public static void main(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        try (final LoggerContext ctx = Configurator.initialize(
+        try (final LoggerContext ignored = Configurator.initialize(
                 ConsoleAppenderAnsiMessagesMain.class.getName(),
                 "target/test-classes/log4j2-console-style-name-ansi.xml")) {
             LOG.fatal("Fatal message.");

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderJAnsiXExceptionMain.java renamed to log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderAnsiXExceptionMain.java

@@ -22,9 +22,7 @@
 import org.apache.logging.log4j.Logger;
 import org.apache.logging.log4j.core.LoggerContext;
 import org.apache.logging.log4j.core.config.Configurator;
-import org.apache.logging.log4j.core.test.categories.Layouts;
 import org.junit.Test;
-import org.junit.experimental.categories.Category;
 
 /**
  * Shows how to use ANSI escape codes to color messages. Each message is printed to the console in color, but the rest
@@ -34,21 +32,20 @@
  * </p>
  *
  * <pre>
- * mvn -Dtest=org.apache.logging.log4j.core.appender.ConsoleAppenderJAnsiXExceptionMain test
+ * mvn -Dtest=org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiXExceptionMain test
  * </pre>
  *
  * or, on Windows:
  *
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%USERPROFILE%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderJAnsiXExceptionMain log4j-core/src/test/resources/log4j2-console-xex-ansi.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderAnsiXExceptionMain log4j-core/src/test/resources/log4j2-console-xex-ansi.xml
  * </pre>
  *
  */
-@Category(Layouts.Jansi.class)
-public class ConsoleAppenderJAnsiXExceptionMain {
+public class ConsoleAppenderAnsiXExceptionMain {
 
     public static void main(final String[] args) {
-        new ConsoleAppenderJAnsiXExceptionMain().test(args);
+        new ConsoleAppenderAnsiXExceptionMain().test(args);
     }
 
     /**
@@ -60,12 +57,10 @@ public void test() {
     }
 
     public void test(final String[] args) {
-        System.setProperty("log4j.skipJansi", "false"); // LOG4J2-2087: explicitly enable
-        // System.out.println(System.getProperty("java.class.path"));
         final String config =
                 args == null || args.length == 0 ? "target/test-classes/log4j2-console-xex-ansi.xml" : args[0];
         final LoggerContext ctx = Configurator.initialize(ConsoleAppenderAnsiMessagesMain.class.getName(), config);
-        final Logger logger = LogManager.getLogger(ConsoleAppenderJAnsiXExceptionMain.class);
+        final Logger logger = LogManager.getLogger(ConsoleAppenderAnsiXExceptionMain.class);
         try {
             Files.getFileStore(Paths.get("?BOGUS?"));
         } catch (final Exception e) {

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/ConsoleAppenderDefaultSuppressedThrowable.java

@@ -31,7 +31,7 @@
  * </p>
  *
  * <pre>
- * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes;%HOME%\.m2\repository\org\fusesource\jansi\jansi\1.14\jansi-1.14.jar; org.apache.logging.log4j.core.appender.ConsoleAppenderNoAnsiStyleLayoutMain log4j-core/target/test-classes/log4j2-console-style-ansi.xml
+ * java -classpath log4j-core\target\test-classes;log4j-core\target\classes;log4j-api\target\classes org.apache.logging.log4j.core.appender.ConsoleAppenderNoAnsiStyleLayoutMain log4j-core/target/test-classes/log4j2-console-style-ansi.xml
  * </pre>
  */
 public class ConsoleAppenderDefaultSuppressedThrowable {
@@ -41,12 +41,11 @@ public class ConsoleAppenderDefaultSuppressedThrowable {
     public static void main(final String[] args) {
         final String config =
                 args.length == 0 ? "target/test-classes/log4j2-console-default-suppressed-throwable.xml" : args[0];
-        test(args, config);
+        test(config);
     }
 
-    static void test(final String[] args, final String config) {
-        // System.out.println(System.getProperty("java.class.path"));
-        try (final LoggerContext ctx =
+    static void test(final String config) {
+        try (final LoggerContext ignored =
                 Configurator.initialize(ConsoleAppenderDefaultSuppressedThrowable.class.getName(), config)) {
             final IOException ioEx = new IOException("test suppressed");
             ioEx.addSuppressed(new IOException("test suppressed 1", new IOException("test 1")));
@@ -55,8 +54,6 @@ static void test(final String[] args, final String config) {
             ioEx.addSuppressed(new IOException("test suppressed 2", ioEx2));
             final IOException e = new IOException("test", ioEx);
             LOG.error("Error message {}, suppressed?", "Hi", e);
-            System.out.println("printStackTrace");
-            e.printStackTrace();
         }
     }
 }