From 7c73c46e753bf6f9ab8fae0c7a6b47930e4c960b Mon Sep 17 00:00:00 2001
From: Sudo Arash <ghalbeyou6@gmail.com>
Date: Fri, 20 Sep 2024 23:03:58 +0330
Subject: [PATCH 1/3] Update miscUtils.ts

---
 packages/yarnpkg-core/sources/miscUtils.ts | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/packages/yarnpkg-core/sources/miscUtils.ts b/packages/yarnpkg-core/sources/miscUtils.ts
index 98dcf1f1015c..e191c92201b7 100644
--- a/packages/yarnpkg-core/sources/miscUtils.ts
+++ b/packages/yarnpkg-core/sources/miscUtils.ts
@@ -467,26 +467,27 @@ export function buildIgnorePattern(ignorePatterns: Array<string>) {
   }).join(`|`);
 }
 
-export function replaceEnvVariables(value: string, {env}: {env: {[key: string]: string | undefined}}) {
-  const regex = /\${(?<variableName>[\d\w_]+)(?<colon>:)?(?:-(?<fallback>[^}]*))?}/g;
+export function replaceEnvVariables(value: string, { env }: { env: { [key: string]: string | undefined } }) {
+  const regex = /\${(?<variableName>[\w_]+)(?::(?<fallback>[^}]*))?}/g;
 
   return value.replace(regex, (...args) => {
-    const {variableName, colon, fallback} = args[args.length - 1];
+    const { variableName, fallback } = args[args.length - 1];
 
-    const variableExist = Object.hasOwn(env, variableName);
     const variableValue = env[variableName];
 
-    if (variableValue)
+    if (variableValue !== undefined) {
       return variableValue;
-    if (variableExist && !colon)
-      return variableValue;
-    if (fallback != null)
+    }
+
+    if (fallback != null) {
       return fallback;
+    }
 
     throw new UsageError(`Environment variable not found (${variableName})`);
   });
 }
 
+
 export function parseBoolean(value: unknown): boolean {
   switch (value) {
     case `true`:

From b9331931d1f8c653d6252362a6fabaced65019f6 Mon Sep 17 00:00:00 2001
From: Sudo Arash <ghalbeyou6@gmail.com>
Date: Fri, 20 Sep 2024 23:19:49 +0330
Subject: [PATCH 2/3] Fixed the bug of the bug

---
 packages/yarnpkg-core/sources/miscUtils.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/yarnpkg-core/sources/miscUtils.ts b/packages/yarnpkg-core/sources/miscUtils.ts
index e191c92201b7..29b05fd35247 100644
--- a/packages/yarnpkg-core/sources/miscUtils.ts
+++ b/packages/yarnpkg-core/sources/miscUtils.ts
@@ -475,19 +475,23 @@ export function replaceEnvVariables(value: string, { env }: { env: { [key: strin
 
     const variableValue = env[variableName];
 
+    // If the variable exists, return its value
     if (variableValue !== undefined) {
       return variableValue;
     }
-
+    
+    // If the variable does not exist but a fallback is provided, return the fallback
     if (fallback != null) {
       return fallback;
     }
 
+    // Throw an error if the variable does not exist and no fallback is provided
     throw new UsageError(`Environment variable not found (${variableName})`);
   });
 }
 
 
+
 export function parseBoolean(value: unknown): boolean {
   switch (value) {
     case `true`:

From dc76e7381959773ea3a8429b499f7ad4d8562d68 Mon Sep 17 00:00:00 2001
From: Sudo Arash <ghalbeyou6@gmail.com>
Date: Fri, 20 Sep 2024 23:20:49 +0330
Subject: [PATCH 3/3] Update the version

---
 packages/yarnpkg-core/package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/yarnpkg-core/package.json b/packages/yarnpkg-core/package.json
index 050fa417ee38..0b345166b77b 100644
--- a/packages/yarnpkg-core/package.json
+++ b/packages/yarnpkg-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@yarnpkg/core",
-  "version": "4.1.3",
+  "version": "4.1.4",
   "license": "BSD-2-Clause",
   "main": "./sources/index.ts",
   "exports": {