Update TerminalBuilder.java

#519 : do not allow dumb terminal by default on windows, unless explicitely requested
jline · Mar 22, 2020 · f71d2c0 · f71d2c0
1 parent 9b7842b
commit f71d2c0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/terminal/src/main/java/org/jline/terminal/TerminalBuilder.java b/terminal/src/main/java/org/jline/terminal/TerminalBuilder.java
@@ -353,6 +353,10 @@ private Terminal doBuild() throws IOException {
                         exception.addSuppressed(t);
                     }
                 }
+                if (terminal == null && !jna && !jansi && (dumb == null || !dumb)) {
+                    throw new IllegalStateException("Unable to create a system terminal. On windows, either "
+                            + "JNA or JANSI library is required.  Make sure to add one of those in the classpath.");
+                }
             } else {
                 if (terminal == null && jna) {
                     try {