console: don't use ANSI escape codes when TERM=dumb

wlodzislav · BridgeAR · commit 99523758dc5d · 2019-03-21T23:32:59.000+01:00
PR-URL: #26261 Fixes: #26187 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Roman Reiss <me@silverwind.io> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
diff --git a/lib/internal/console/constructor.js b/lib/internal/console/constructor.js
@@ -346,7 +346,7 @@ const consoleMethods = {
   clear() {
     // It only makes sense to clear if _stdout is a TTY.
     // Otherwise, do nothing.
-    if (this._stdout.isTTY) {
+    if (this._stdout.isTTY && process.env.TERM !== 'dumb') {
       // The require is here intentionally to avoid readline being
       // required too early when console is first loaded.
       const { cursorTo, clearScreenDown } = require('readline');
diff --git a/test/pseudo-tty/console-dumb-tty.js b/test/pseudo-tty/console-dumb-tty.js
@@ -0,0 +1,9 @@
+'use strict';
+require('../common');
+
+process.env.TERM = 'dumb';
+
+console.log({ foo: 'bar' });
+console.dir({ foo: 'bar' });
+console.log('%s q', 'string');
+console.log('%o with object format param', { foo: 'bar' });
diff --git a/test/pseudo-tty/console-dumb-tty.out b/test/pseudo-tty/console-dumb-tty.out
@@ -0,0 +1,4 @@
+{ foo: 'bar' }
+{ foo: 'bar' }
+string q
+{ foo: 'bar' } with object format param
