From 445177bf420049041ade4d7526a5f4a8194bd216 Mon Sep 17 00:00:00 2001
From: "F. Eugene Aumson" <gene@aumson.org>
Date: Thu, 16 Aug 2018 15:26:20 -0700
Subject: move doesFileExist to fsWrapper

---
 packages/sol-compiler/src/utils/fs_wrapper.ts | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'packages/sol-compiler/src/utils')

diff --git a/packages/sol-compiler/src/utils/fs_wrapper.ts b/packages/sol-compiler/src/utils/fs_wrapper.ts
index 44c97bd1e..8d6800276 100644
--- a/packages/sol-compiler/src/utils/fs_wrapper.ts
+++ b/packages/sol-compiler/src/utils/fs_wrapper.ts
@@ -13,4 +13,16 @@ export const fsWrapper = {
     statAsync: promisify<fs.Stats>(fs.stat),
     appendFileAsync: promisify<undefined>(fs.appendFile),
     accessAsync: promisify<boolean>(fs.access),
+    doesFileExistAsync: async (filePath: string): Promise<boolean> => {
+        try {
+            await fsWrapper.accessAsync(
+                filePath,
+                // node says we need to use bitwise, but tslint says no:
+                fs.constants.F_OK | fs.constants.R_OK, // tslint:disable-line:no-bitwise
+            );
+        } catch (err) {
+            return false;
+        }
+        return true;
+    },
 };
-- 
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