chore: extract nodejs file manager

yarn-project/noir-compiler/src/compile/noir/file-manager/nodejs-file-manager.ts

@@ -0,0 +1,34 @@
+import { existsSync } from 'node:fs';
+import * as fs from 'node:fs/promises';
+
+import { FileManager } from './file-manager.js';
+
+/**
+ * Creates a new FileManager instance based on nodejs fs
+ * @param dataDir - where to store files
+ */
+export function createNodejsFileManager(dataDir: string): FileManager {
+  return new FileManager(
+    {
+      ...fs,
+      ...{
+        // ExistsSync is not available in the fs/promises module
+        existsSync,
+        // This is added here because the node types are not compatible with the FileSystem type for mkdir
+        // Typescripts tries to use a different variant of the function that is not the one that has the optional options.
+        mkdir: async (
+          dir: string,
+          opts?: {
+            /**
+             * Traverse child directories
+             */
+            recursive: boolean;
+          },
+        ) => {
+          await fs.mkdir(dir, opts);
+        },
+      },
+    },
+    dataDir,
+  );
+}

yarn-project/noir-compiler/src/index.ts

@@ -1,11 +1,9 @@
 import { ContractArtifact } from '@aztec/foundation/abi';
 
-import { existsSync } from 'node:fs';
-import * as fs from 'node:fs/promises';
 import { join, resolve } from 'path';
 
 import { CompileOpts, NargoContractCompiler } from './compile/nargo.js';
-import { FileManager } from './compile/noir/file-manager/file-manager.js';
+import { createNodejsFileManager } from './compile/noir/file-manager/nodejs-file-manager.js';
 import { NoirWasmCompileOptions, NoirWasmContractCompiler } from './compile/noir/noir-wasm-compiler.js';
 import { generateArtifact, generateContractArtifact } from './contract-interface-gen/abi.js';
 import { ProgramArtifact } from './noir_artifact.js';
@@ -42,26 +40,7 @@ export async function compileUsingNoirWasm(
   opts: NoirWasmCompileOptions,
 ): Promise<(ContractArtifact | ProgramArtifact)[]> {
   const cacheRoot = process.env.XDG_CACHE_HOME ?? join(process.env.HOME ?? '', '.cache');
-  const fileManager = new FileManager(
-    {
-      ...fs,
-      ...{
-        existsSync,
-        mkdir: async (
-          dir: string,
-          opts?: {
-            /**
-             * Traverse child directories
-             */
-            recursive: boolean;
-          },
-        ) => {
-          await fs.mkdir(dir, opts);
-        },
-      },
-    },
-    join(cacheRoot, 'aztec-noir-compiler'),
-  );
+  const fileManager = createNodejsFileManager(join(cacheRoot, 'aztec-noir-compiler'));
   const compiler = await NoirWasmContractCompiler.new(fileManager, resolve(projectPath), opts);
   const artifacts = await compiler.compile();
   return artifacts.map(artifact => {