[rush]Fix "Unknown env config" npm warnings during rush-pnpm operations (#5716)

* fix: convert NPM_CONFIG env vars to CLI args in rush-pnpm to prevent npm warnings

In RushPnpmCommandLineParser._executeAsync(), replace NPM_CONFIG_*
environment variables (STORE_DIR, CACHE_DIR, STATE_DIR, WORKSPACE_DIR)
with pnpm CLI arguments (--store-dir, --config.cacheDir, --config.stateDir,
--config.workspaceDir). This prevents these pnpm-specific configuration
values from leaking to npm when pnpm internally delegates to npm libraries
(e.g. during publish operations), which caused "Unknown env config" warnings.

This approach is consistent with how BaseInstallManager already passes
these values via CLI args during rush install/update.

Fixes #5704

Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>
Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/c306dd18-490c-4a52-a3ca-3447740f7280

* Update changefile.

* revert previous RushPnpmCommandLineParser changes; fix RushVersionSelector instead

Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>
Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/e3e81359-dd04-4186-979b-7a62e0a663e3

* fix: filter npm-incompatible .npmrc properties in RushVersionSelector

When the Rush version selector uses npm to install a different version of
rush-lib, the .npmrc from the repo is synced but pnpm-specific properties
(like hoist, publish-branch, email, etc.) were not being filtered out.
This caused npm to emit "Unknown env config" and "Unknown project config"
warnings.

Add filterNpmIncompatibleProperties: true to the installPackageInDirectoryAsync
call in RushVersionSelector, matching the pattern already used in
InstallHelpers.ensureLocalPackageManagerAsync().

Fixes #5704

Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>
Agent-Logs-Url: https://github.com/microsoft/rushstack/sessions/e3e81359-dd04-4186-979b-7a62e0a663e3

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: iclanton <5010588+iclanton@users.noreply.github.com>
Co-authored-by: Ian Clanton-Thuon <iclanton@users.noreply.github.com>

Author: Copilot

apps/rush/src/RushVersionSelector.ts

@@ -62,7 +62,10 @@ export class RushVersionSelector {
           // different implementations of the same version of the same package.
           // This was needed for: https://github.com/microsoft/rushstack/issues/691
           commonRushConfigFolder: configuration ? configuration.commonRushConfigFolder : undefined,
-          suppressOutput: true
+          suppressOutput: true,
+          // Filter out npm-incompatible properties (e.g. pnpm-specific settings) from .npmrc
+          // since this installation always uses npm regardless of the repo's package manager.
+          filterNpmIncompatibleProperties: true
         });
 
         console.log(`Successfully installed Rush version ${version} in ${expectedRushPath}.`);

common/changes/@microsoft/rush/fix-rush-pnpm-npm-config-warnings_2026-03-23-18-16.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/rush",
+      "comment": "Filter npm-incompatible properties from .npmrc when installing rush-lib via npm, to eliminate spurious \"Unknown env config\" and \"Unknown project config\" warnings.",
+      "type": "none"
+    }
+  ],
+  "packageName": "@microsoft/rush"
+}