fix: skip automatic download/install of Node.js versions in WebContainer

.changeset/late-seals-brake.md

@@ -0,0 +1,5 @@
+---
+"pnpm": patch
+---
+
+Don't install Node.js when use-node-version is set in a WebContainer [#7478](https://github.com/pnpm/pnpm/pull/7478).

cspell.json

@@ -251,11 +251,12 @@
     "uuidv",
     "valign",
     "vuln",
+    "webcontainer",
     "winst",
     "wrappy",
     "xmarw",
     "zkochan",
     "zoli",
-    "zoltan" 
+    "zoltan"
   ]
 }

pnpm/src/main.ts

@@ -10,7 +10,7 @@ import {
 } from '@pnpm/config'
 import { executionTimeLogger, scopeLogger } from '@pnpm/core-loggers'
 import { filterPackagesFromDir } from '@pnpm/filter-workspace-packages'
-import { logger } from '@pnpm/logger'
+import { globalWarn, logger } from '@pnpm/logger'
 import { type ParsedCliArgs } from '@pnpm/parse-cli-args'
 import { node } from '@pnpm/plugin-commands-env'
 import { finishWorkers } from '@pnpm/worker'
@@ -271,9 +271,13 @@ export async function main (inputArgv: string[]) {
     })
 
     if (config.useNodeVersion != null) {
-      const nodePath = await node.getNodeBinDir(config)
-      config.extraBinPaths.push(nodePath)
-      config.nodeVersion = config.useNodeVersion
+      if ('webcontainer' in process.versions) {
+        globalWarn('Automatic installation of different Node.js versions is not supported in WebContainer')
+      } else {
+        const nodePath = await node.getNodeBinDir(config)
+        config.extraBinPaths.push(nodePath)
+        config.nodeVersion = config.useNodeVersion
+      }
     }
     let result = pnpmCmds[cmd ?? 'help'](
       // TypeScript doesn't currently infer that the type of config