1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package androidx.build.testConfiguration
18 
19 import com.google.common.hash.Hashing
20 import com.google.common.io.BaseEncoding
21 import java.io.File
22 
23 @Suppress("UnstableApiUsage") // guava Hashing is marked as @Beta
sha256null24 internal fun sha256(file: File): String {
25     val hasher = Hashing.sha256().newHasher()
26     file.inputStream().buffered().use {
27         while (it.available() > 0) {
28             hasher.putBytes(it.readNBytes(1024))
29         }
30     }
31     return BaseEncoding.base16().lowerCase().encode(hasher.hash().asBytes())
32 }
33