Include a README.md in the java tools release with instructions on how to re-create from source the same release.
Closes #8040.
PiperOrigin-RevId: 243789723
diff --git a/src/upload_all_java_tools.sh b/src/upload_all_java_tools.sh
new file mode 100755
index 0000000..b560e08
--- /dev/null
+++ b/src/upload_all_java_tools.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+# Copyright 2019 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.
+
+# A script to upload a given java_tools zip on GCS. Used by the java_tools_binaries
+# Buildkite pipeline. It is not recommended to run this script manually.
+#
+# Mandatory flags:
+# --java_tools_zip The workspace-relative path of a java_tools zip.
+# --gcs_java_tools_dir The directory under bazel_java_tools on GCS where the zip is uploaded.
+# --java_version The version of the javac the given zip embeds.
+# --platform The name of the platform where the zip was built.
+
+# Script used by the "java_tools binaries" Buildkite pipeline to build the java tools archives
+# and upload them on GCS.
+#
+# The script has to be executed directly without invoking bazel:
+# $ src/upload_all_java_tools.sh
+#
+# The script cannot be invoked through a sh_binary using bazel because git
+# cannot be used through a sh_binary.
+
+commit_hash=$(git rev-parse HEAD)
+timestamp=$(date +%s)
+bazel_version=$(bazel info release | cut -d' ' -f2)
+
+# Passing the same commit_hash and timestamp to all targets to mark all the artifacts
+# uploaded on GCS with the same identifier.
+for java_version in 9 10; do
+ for target in src:upload_java_tools_java${java_version} src:upload_java_tools_dist_java${java_version}; do
+ bazel run ${target} -- --commit_hash ${commit_hash} --timestamp ${timestamp} --bazel_version ${bazel_version}
+ done
+done
