fix(core): use current user when hashing native file & enable setting its directory via env

docs/shared/reference/environment-variables.md

@@ -30,6 +30,7 @@ The following environment variables are ones that you can set to change the beha
 | NX_SKIP_LOG_GROUPING             | boolean | If set to `true`, Nx will not group command's logs on CI.                                                                                                                                                                      |
 | NX_MIGRATE_CLI_VERSION           | string  | The version of Nx to use for running the `nx migrate` command. If not set, it defaults to `latest`.                                                                                                                            |
 | NX_LOAD_DOT_ENV_FILES            | boolean | If set to 'false', Nx will not load any environment files (e.g. `.local.env`, `.env.local`)                                                                                                                                    |
+| NX_NATIVE_FILE_CACHE_DIRECTORY   | string  | The cache for native `.node` files is stored under a global temp directory by default. Set this variable to use a different directory. This is interpreted as an absolute path.                                                |
 
 Nx will set the following environment variables so they can be accessible within the process even outside of executors and generators.
 

packages/nx/src/native/native-file-cache-location.ts

@@ -1,10 +1,24 @@
-import { tmpdir } from 'os';
+import { tmpdir, userInfo } from 'os';
 import { join } from 'path';
 import { createHash } from 'crypto';
 import { workspaceRoot } from '../utils/workspace-root';
 
 export const nativeFileCacheLocation = join(
-  tmpdir(),
-  'nx-native-file-cache',
-  createHash('sha256').update(workspaceRoot).digest('hex')
+  getNativeFileCacheBaseFolder(),
+  createHash('sha256')
+    .update(workspaceRoot)
+    .update(userInfo().username)
+    .digest('hex')
 );
+
+function getNativeFileCacheBaseFolder() {
+  if (process.env.NX_NATIVE_FILE_CACHE_DIRECTORY) {
+    return process.env.NX_NATIVE_FILE_CACHE_DIRECTORY;
+  } else {
+    const shortUserHash = createHash('sha256')
+      .update(userInfo().username)
+      .digest('hex')
+      .substring(0, 7);
+    return join(tmpdir(), `nx-native-file-cache-${shortUserHash}`);
+  }
+}