repl: do not run --eval code if there is none

lib/internal/main/repl.js

@@ -46,10 +46,9 @@ cliRepl.createInternalRepl(process.env, (err, repl) => {
 
 // If user passed '-e' or '--eval' along with `-i` or `--interactive`,
 // evaluate the code in the current context.
-const source = getOptionValue('--eval');
-if (source != null) {
+if (getOptionValue('[has_eval_string]')) {
  evalScript('[eval]',
-source,
+getOptionValue('--eval'),
  getOptionValue('--inspect-brk'),
  getOptionValue('--print'));
 }

lib/internal/process/execution.js

@@ -55,6 +55,7 @@ function evalScript(name, body, breakFirstLine, printResult) {
  const { kVmBreakFirstLineSymbol } = require('internal/util');
 
  const cwd = tryGetCwd();
+ const origModule = global.module; // Set e.g. when called from the REPL.
 
  const module = new CJSModule(name);
  module.filename = path.join(cwd, name);
@@ -79,6 +80,9 @@ function evalScript(name, body, breakFirstLine, printResult) {
  const { kStdout, print } = require('internal/util/print');
  print(kStdout, result);
  }
+
+ if (origModule !== undefined)
+ global.module = origModule;
 }
 
 const exceptionHandlerState = { captureFn: null };

test/parallel/test-repl-cli-eval.js

@@ -0,0 +1,22 @@
+'use strict';
+constcommon=require('../common');
+constchild_process=require('child_process');
+constassert=require('assert');
+
+// Regression test for https://github.com/nodejs/node/issues/27575:
+// module.id === '<repl>' in the REPL.
+
+for(constextraFlagsof[[],['-e','42']]){
+constflags=['--interactive', ...extraFlags];
+constproc=child_process.spawn(process.execPath,flags,{
+stdio: ['pipe','pipe','inherit']
+});
+proc.stdin.write('module.id\n.exit\n');
+
+letstdout='';
+proc.stdout.setEncoding('utf8');
+proc.stdout.on('data',(chunk)=>stdout+=chunk);
+proc.stdout.on('end',common.mustCall(()=>{
+assert(stdout.includes('<repl>'),`stdout: ${stdout}`);
+}));
+}