feat: use path module for generating paths

Signed-off-by: Jonah Snider <[email protected]>

Author: jonahsnider

src/index.ts

@@ -1,3 +1,5 @@
+import {join as joinPaths} from 'path';
+
 interface NetlifyUtils {
 	cache: {
 		restore(path: string, options: {digest: string[]}): Promise<any>;
@@ -12,14 +14,14 @@ module.exports = {
 	//  - the file/directory already exists locally
 	//  - the file/directory has not been cached yet
 	async onGetCache({utils}: {utils: NetlifyUtils}) {
-		await utils.cache.restore('./.next', {digest: ['./.next/build-manifest.json']});
+		await utils.cache.restore(joinPaths(__dirname, '.next'), {digest: [joinPaths(__dirname, '.next', 'build-manifest.json')]});
 	},
 	// Cache file/directory for future builds.
 	// Does not do anything if:
 	//  - the file/directory does not exist locally
 	//  - the file/directory is already cached and its contents has not changed
 	//    If this is a directory, this includes children's contents
 	async onSaveCache({utils}: {utils: NetlifyUtils}) {
-		await utils.cache.save('./.next', {digest: ['./.next/build-manifest.json']});
+		await utils.cache.save(joinPaths(__dirname, '.next'), {digest: [joinPaths(__dirname, '.next', 'build-manifest.json')]});
 	}
 };