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-rw-r--r--packages/sol-compiler/src/utils/fs_wrapper.ts12
1 files changed, 12 insertions, 0 deletions
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;
+ },
};