1 files changed, 44 insertions, 0 deletions
diff --git a/gazelle/manifest/hasher/main.go b/gazelle/manifest/hasher/main.go
new file mode 100644
index 0000000..61f8952
--- /dev/null
+++ b/gazelle/manifest/hasher/main.go
@@ -0,0 +1,44 @@
+// Copyright 2023 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"crypto/sha256"
+	"io"
+	"log"
+	"os"
+)
+
+func main() {
+	h := sha256.New()
+	out, err := os.Create(os.Args[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer out.Close()
+	for _, filename := range os.Args[2:] {
+		f, err := os.Open(filename)
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer f.Close()
+		if _, err := io.Copy(h, f); err != nil {
+			log.Fatal(err)
+		}
+	}
+	if _, err := out.Write(h.Sum(nil)); err != nil {
+		log.Fatal(err)
+	}
+}