Add clang-tools Dockerfile.

ci/docker/clang-tools/Dockerfile

@@ -0,0 +1,49 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+FROM ubuntu:groovy
+LABEL maintainer="Apache Geode <[email protected]>"
+LABEL description="Minimal image for building with clang toolset."
+
+RUN apt-get update \
+    && apt-get install -y \
+        bash \
+        libssl-dev \
+        patch \
+        cmake \
+        git \
+        doxygen \
+        openjdk-8-jdk-headless \
+        jq \
+    && rm -rf /var/lib/apt/lists/*
+
+ARG CLANG_VERSION=11
+RUN apt-get update \
+    && apt-get install -y \
+        clang-${CLANG_VERSION} \
+        lld-${CLANG_VERSION} \
+        clang-format-${CLANG_VERSION} \
+        clang-tidy-${CLANG_VERSION} \
+    && update-alternatives --install /usr/bin/clang           clang           /usr/bin/clang-${CLANG_VERSION} 10 \
+    && update-alternatives --install /usr/bin/clang++         clang++         /usr/bin/clang++-${CLANG_VERSION} 10 \
+    && update-alternatives --install /usr/bin/lld             lld             /usr/bin/lld-${CLANG_VERSION} 10 \
+    && update-alternatives --install /usr/bin/clang-tidy      clang-tidy      /usr/bin/clang-tidy-${CLANG_VERSION} 10 \
+    && update-alternatives --install /usr/bin/run-clang-tidy  run-clang-tidy  /usr/bin/run-clang-tidy-${CLANG_VERSION} 10 \
+    && update-alternatives --install /usr/bin/clang-format    clang-format    /usr/bin/clang-format-${CLANG_VERSION} 10 \
+    && update-alternatives --install /usr/bin/cc              cc              /usr/bin/clang 10 \
+    && update-alternatives --install /usr/bin/c++             c++             /usr/bin/clang++ 10 \
+    && update-alternatives --install /usr/bin/ld              ld              /usr/bin/lld 10 \
+    && rm -rf /var/lib/apt/lists/*