only report that standard streams are tty's if the python language was configured with interactive terminal

Author: timfel

graalpython/com.oracle.graal.python.shell/src/com/oracle/graal/python/shell/GraalPythonMain.java

@@ -247,6 +247,7 @@ protected void launch(Builder contextBuilder) {
 
         ConsoleHandler consoleHandler = createConsoleHandler(System.in, System.out);
         contextBuilder.arguments(getLanguageId(), programArgs.toArray(new String[0])).in(consoleHandler.createInputStream());
+        contextBuilder.option("python.TerminalIsInteractive", Boolean.toString(stdinIsInteractive));
         contextBuilder.option("python.TerminalWidth", Integer.toString(consoleHandler.getTerminalWidth()));
         contextBuilder.option("python.TerminalHeight", Integer.toString(consoleHandler.getTerminalHeight()));
 

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/PosixModuleBuiltins.java

@@ -184,6 +184,10 @@ public class PosixModuleBuiltins extends PythonBuiltins {
                     new PosixFilePermission[]{PosixFilePermission.OWNER_READ, PosixFilePermission.OWNER_WRITE, PosixFilePermission.OWNER_EXECUTE},
     };
 
+    private static boolean terminalIsInteractive(PythonContext context) {
+        return PythonOptions.getFlag(context, PythonOptions.TerminalIsInteractive);
+    }
+
     @Override
     protected List<? extends NodeFactory<? extends PythonBuiltinBaseNode>> getNodeFactories() {
         return PosixModuleBuiltinsFactory.getFactories();
@@ -1032,16 +1036,11 @@ boolean isATTY(int fd) {
                 case 0:
                 case 1:
                 case 2:
-                    return consoleCheck();
+                    return terminalIsInteractive(getContext());
                 default:
                     return false;
             }
         }
-
-        @TruffleBoundary(allowInlining = true)
-        private static boolean consoleCheck() {
-            return System.console() != null;
-        }
     }
 
     @Builtin(name = "_exit", fixedNumOfPositionalArgs = 1)

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/PythonOptions.java

@@ -119,6 +119,9 @@ private PythonOptions() {
     @Option(category = OptionCategory.EXPERT, help = "Enable forced splitting (of builtins). Default true.") //
     public static final OptionKey<Boolean> EnableForcedSplits = new OptionKey<>(true);
 
+    @Option(category = OptionCategory.EXPERT, help = "") //
+    public static final OptionKey<Boolean> TerminalIsInteractive = new OptionKey<>(false);
+
     @Option(category = OptionCategory.EXPERT, help = "") //
     public static final OptionKey<Integer> TerminalWidth = new OptionKey<>(80);