File groovy18-jansi.patch of Package groovy18.28016

diff -urEbwB groovy-core-GROOVY_1_8_9/src/main/org/codehaus/groovy/tools/shell/IO.java groovy-core-GROOVY_1_8_9.new/src/main/org/codehaus/groovy/tools/shell/IO.java
--- groovy-core-GROOVY_1_8_9/src/main/org/codehaus/groovy/tools/shell/IO.java	2013-02-15 09:42:29.000000000 +0100
+++ groovy-core-GROOVY_1_8_9.new/src/main/org/codehaus/groovy/tools/shell/IO.java	2022-05-12 14:22:46.063512048 +0200
@@ -23,8 +23,8 @@
 import java.io.PrintWriter;
 import java.io.Reader;
 
+import org.codehaus.groovy.runtime.InvokerHelper;
 import org.codehaus.groovy.tools.shell.util.Preferences;
-import org.fusesource.jansi.AnsiRenderWriter;
 
 /**
  * Container for input/output handles.
@@ -34,6 +34,8 @@
  */
 public class IO
 {
+    private static final String ANSI_RENDER_WRITER = "org.fusesource.jansi.AnsiRenderWriter";
+
     /** Raw input stream. */
     public final InputStream inputStream;
 
@@ -53,6 +55,11 @@
     public final PrintWriter err;
 
     /**
+     * Whether ansi support is available
+     */
+    public final boolean ansiSupported;
+
+    /**
      * Construct a new IO container.
      */
     public IO(final InputStream inputStream, final OutputStream outputStream, final OutputStream errorStream) {
@@ -65,8 +72,36 @@
         this.errorStream = errorStream;
 
         this.in = new InputStreamReader(inputStream);
-        this.out = new AnsiRenderWriter(outputStream, true);
-        this.err = new AnsiRenderWriter(errorStream, true);
+        boolean ansiSupported = false;
+        try {
+            Class.forName(ANSI_RENDER_WRITER, false, IO.class.getClassLoader());
+            ansiSupported = true;
+        } catch (ClassNotFoundException ignore) {
+        }
+        this.ansiSupported = ansiSupported;
+        PrintWriter out = null;
+        PrintWriter err = null;
+        if (ansiSupported) {
+            out = tryConstructRenderWriter(outputStream);
+            err = tryConstructRenderWriter(errorStream);
+        }
+        if (out == null) {
+            out = new PrintWriter(outputStream, true);
+        }
+        if (err == null) {
+            err = new PrintWriter(errorStream, true);
+        }
+        this.out = out;
+        this.err = err;
+    }
+
+    protected PrintWriter tryConstructRenderWriter(OutputStream stream) {
+        // load via reflection to avoid hard-coded dependency on jansi jar
+        try {
+            return (PrintWriter) InvokerHelper.invokeConstructorOf(ANSI_RENDER_WRITER, new Object[]{stream, true});
+        } catch (ClassNotFoundException ignore) {
+            return null;
+        }
     }
 
     /**
@@ -78,8 +113,6 @@
 
     /**
      * Set the verbosity level.
-     *
-     * @param verbosity
      */
     public void setVerbosity(final Verbosity verbosity) {
         assert verbosity != null;
diff -urEbwB groovy-core-GROOVY_1_8_9/src/main/org/codehaus/groovy/tools/shell/util/Logger.java groovy-core-GROOVY_1_8_9.new/src/main/org/codehaus/groovy/tools/shell/util/Logger.java
--- groovy-core-GROOVY_1_8_9/src/main/org/codehaus/groovy/tools/shell/util/Logger.java	2013-02-15 09:42:29.000000000 +0100
+++ groovy-core-GROOVY_1_8_9.new/src/main/org/codehaus/groovy/tools/shell/util/Logger.java	2022-05-12 14:03:06.980193451 +0200
@@ -56,13 +56,12 @@
             }
         }
 
-        Color color = GREEN;
-        if (WARN.equals(level) || ERROR.equals(level)) {
-            color = RED;
+        if (io.ansiSupported) {
+            logWithAnsi(level, msg);
+        } else {
+            logDefault(level, msg);
         }
 
-        io.out.println(ansi().a(INTENSITY_BOLD).a(color).a(level).reset().a(" [").a(name).a("] ").a(msg));
-
         if (cause != null) {
             cause.printStackTrace(io.out);
         }
@@ -74,6 +73,18 @@
         }
     }
     
+    private void logDefault(String level, Object msg) {
+        io.out.println(level + " [" + name + "] " + msg);
+    }
+
+    private void logWithAnsi(String level, Object msg) {
+        Color color = GREEN;
+        if (WARN.equals(level) || ERROR.equals(level)) {
+            color = RED;
+        }
+        io.out.println(ansi().a(INTENSITY_BOLD).fg(color).a(level).reset().a(" [").a(name).a("] ").a(msg));
+    }
+
     //
     // Level helpers
     //