From 8a6454f02b8fc7ec164b544a147e26ca3f6fd7fd Mon Sep 17 00:00:00 2001
From: Antoine du Hamel <duhamelantoine1995@gmail.com>
Date: Sat, 12 Feb 2022 16:34:48 +0100
Subject: [PATCH] esm: use `[stdin]` as module URL when reading stdin

---
 lib/internal/main/eval_stdin.js    | 5 ++++-
 lib/internal/modules/esm/loader.js | 4 ++--
 lib/internal/process/execution.js  | 4 ++--
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/internal/main/eval_stdin.js b/lib/internal/main/eval_stdin.js
index d97dbece8f0f56..5c7662b0153e50 100644
--- a/lib/internal/main/eval_stdin.js
+++ b/lib/internal/main/eval_stdin.js
@@ -5,6 +5,9 @@
 const {
   prepareMainThreadExecution
 } = require('internal/bootstrap/pre_execution');
+const {
+  pathToFileURL,
+} = require('internal/url');
 
 const { getOptionValue } = require('internal/options');
 
@@ -24,7 +27,7 @@ readStdin((code) => {
 
   const print = getOptionValue('--print');
   if (getOptionValue('--input-type') === 'module')
-    evalModule(code, print);
+    evalModule(code, print, pathToFileURL(`${process.cwd()}/[stdin]`).href);
   else
     evalScript('[stdin]',
                code,
diff --git a/lib/internal/modules/esm/loader.js b/lib/internal/modules/esm/loader.js
index d5e0b61af6a309..7e146149d4f976 100644
--- a/lib/internal/modules/esm/loader.js
+++ b/lib/internal/modules/esm/loader.js
@@ -90,7 +90,7 @@ class ESMLoader {
   /**
    * The index for assigning unique URLs to anonymous module evaluation
    */
-  evalIndex = 0;
+  #evalIndex = 0;
 
   /**
    * Registry of loaded modules, akin to `require.cache`
@@ -202,7 +202,7 @@ class ESMLoader {
 
   async eval(
     source,
-    url = pathToFileURL(`${process.cwd()}/[eval${++this.evalIndex}]`).href
+    url = pathToFileURL(`${process.cwd()}/[eval${++this.#evalIndex}]`).href
   ) {
     const evalInstance = (url) => {
       const { ModuleWrap, callbackMap } = internalBinding('module_wrap');
diff --git a/lib/internal/process/execution.js b/lib/internal/process/execution.js
index 4a8e51f694f7e6..a94735e9bd2152 100644
--- a/lib/internal/process/execution.js
+++ b/lib/internal/process/execution.js
@@ -39,13 +39,13 @@ function tryGetCwd() {
   }
 }
 
-function evalModule(source, print) {
+function evalModule(source, print, url = undefined) {
   if (print) {
     throw new ERR_EVAL_ESM_CANNOT_PRINT();
   }
   const { loadESM } = require('internal/process/esm_loader');
   const { handleMainPromise } = require('internal/modules/run_main');
-  return handleMainPromise(loadESM((loader) => loader.eval(source)));
+  return handleMainPromise(loadESM((loader) => loader.eval(source, url)));
 }
 
 function evalScript(name, body, breakFirstLine, print) {