Move the sha256 tool into its own directory, as it isn't specific to docker_build.

PiperOrigin-RevId: 153508081

1 files changed, 34 insertions, 0 deletions

diff --git a/tools/build_defs/hash/hash.bzl b/tools/build_defs/hash/hash.bzl
new file mode 100644
index 0000000000..62741540b2
--- /dev/null
+++ b/tools/build_defs/hash/hash.bzl
@@ -0,0 +1,34 @@
+# Copyright 2017 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.
+"""Functions for producing the hash of an artifact."""
+
+def sha256(ctx, artifact):
+  """Create an action to compute the SHA-256 of an artifact."""
+  out = ctx.new_file(artifact.basename + ".sha256")
+  ctx.action(
+      executable = ctx.executable.sha256,
+      arguments = [artifact.path, out.path],
+      inputs = [artifact],
+      outputs = [out],
+      mnemonic = "SHA256")
+  return out
+
+
+tools = {
+    "sha256": attr.label(
+        default=Label("//tools/build_defs/hash:sha256"),
+        cfg="host",
+        executable=True,
+        allow_files=True)
+}