lib,permission: drop repl autocomplete when pm enabled

PR-URL: https://github.com/nodejs/node/pull/48920
Fixes: https://github.com/nodejs/node/issues/48884
Reviewed-By: Paolo Insogna <paolo@cowtech.it>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

lib/internal/util/inspector.js

@@ -12,6 +12,7 @@ const {
 } = primordials;
 
 const { validatePort } = require('internal/validators');
+const permission = require('internal/process/permission');
 
 const kMinPort = 1024;
 const kMaxPort = 65535;
@@ -47,6 +48,10 @@ let session;
 function sendInspectorCommand(cb, onError) {
   const { hasInspector } = internalBinding('config');
   if (!hasInspector) return onError();
+  // Do not preview when the permission model is enabled
+  // because this feature require access to the inspector,
+  // which is unavailable in this case.
+  if (permission.isEnabled()) return onError();
   const inspector = require('inspector');
   if (session === undefined) session = new inspector.Session();
   session.connect();

test/parallel/test-repl-permission-model.js

@@ -0,0 +1,135 @@
+'use strict';
+
+// Flags: --expose-internals --experimental-permission --allow-fs-read=*
+
+const common = require('../common');
+const stream = require('stream');
+const REPL = require('internal/repl');
+const assert = require('assert');
+const { inspect } = require('util');
+
+common.skipIfDumbTerminal();
+
+// Create an input stream specialized for testing an array of actions
+class ActionStream extends stream.Stream {
+  run(data) {
+    const _iter = data[Symbol.iterator]();
+    const doAction = () => {
+      const next = _iter.next();
+      if (next.done) {
+        // Close the repl. Note that it must have a clean prompt to do so.
+        this.emit('keypress', '', { ctrl: true, name: 'd' });
+        return;
+      }
+      const action = next.value;
+
+      if (typeof action === 'object') {
+        this.emit('keypress', '', action);
+      } else {
+        this.emit('data', `${action}`);
+      }
+      setImmediate(doAction);
+    };
+    doAction();
+  }
+  resume() {}
+  pause() {}
+}
+ActionStream.prototype.readable = true;
+
+// Mock keys
+const ENTER = { name: 'enter' };
+const TABULATION = { name: 'tab' };
+
+const prompt = '> ';
+
+const tests = [
+  {
+    test: (function*() {
+      yield 'f';
+      yield TABULATION;
+      yield ENTER;
+    })(),
+    expected: [],
+    env: {}
+  },
+];
+
+const numtests = tests.length;
+
+const runTestWrap = common.mustCall(runTest, numtests);
+
+function runTest() {
+  const opts = tests.shift();
+  if (!opts) return; // All done
+
+  const { expected, skip } = opts;
+
+  // Test unsupported on platform.
+  if (skip) {
+    setImmediate(runTestWrap, true);
+    return;
+  }
+  const lastChunks = [];
+  let i = 0;
+
+  REPL.createInternalRepl(opts.env, {
+    input: new ActionStream(),
+    output: new stream.Writable({
+      write(chunk, _, next) {
+        const output = chunk.toString();
+
+        if (!opts.showEscapeCodes &&
+            (output[0] === '\x1B' || /^[\r\n]+$/.test(output))) {
+          return next();
+        }
+
+        lastChunks.push(output);
+
+        if (expected.length && !opts.checkTotal) {
+          try {
+            assert.strictEqual(output, expected[i]);
+          } catch (e) {
+            console.error(`Failed test # ${numtests - tests.length}`);
+            console.error('Last outputs: ' + inspect(lastChunks, {
+              breakLength: 5, colors: true
+            }));
+            throw e;
+          }
+          // TODO(BridgeAR): Auto close on last chunk!
+          i++;
+        }
+
+        next();
+      }
+    }),
+    allowBlockingCompletions: true,
+    completer: opts.completer,
+    prompt,
+    useColors: false,
+    preview: opts.preview,
+    terminal: true
+  }, function(err, repl) {
+    if (err) {
+      console.error(`Failed test # ${numtests - tests.length}`);
+      throw err;
+    }
+
+    repl.once('close', () => {
+
+      if (opts.checkTotal) {
+        assert.deepStrictEqual(lastChunks, expected);
+      } else if (expected.length !== i) {
+        console.error(tests[numtests - tests.length - 1]);
+        throw new Error(`Failed test # ${numtests - tests.length}`);
+      }
+
+      setImmediate(runTestWrap, true);
+    });
+
+    repl.input.run(opts.test);
+  });
+}
+
+// run the tests
+runTest();