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+# Copyright 2019 Google LLC
+#
+# 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.
+
+ARG DISTRO_VERSION=18.04
+FROM ubuntu:${DISTRO_VERSION}
+
+RUN apt update && \
+    apt install -y \
+        build-essential \
+        clang \
+        cmake \
+        curl \
+        doxygen \
+        gawk \
+        git \
+        gcc \
+        golang \
+        g++ \
+        libc-ares-dev \
+        libc-ares2 \
+        libssl-dev \
+        make \
+        ninja-build \
+        pkg-config \
+        python-pip \
+        shellcheck \
+        tar \
+        unzip \
+        wget \
+        zlib1g-dev
+
+# Install newer c-ares on Ubuntu 16.04.
+RUN if grep -q 16.04 /etc/lsb-release; then \
+       apt remove libc-ares-dev libc-ares2; \
+       apt install -y automake libtool; \
+       mkdir -p /var/tmp/Downloads; \
+       cd /var/tmp/Downloads; \
+       wget -q https://github.com/c-ares/c-ares/archive/cares-1_15_0.tar.gz; \
+       tar -xf cares-1_15_0.tar.gz; \
+       cd /var/tmp/Downloads/c-ares-cares-1_15_0; \
+       ./buildconf && ./configure && make -j $(nproc); \
+       make install; \
+       ldconfig; \
+    fi
+
+# By default, Ubuntu 18.04 does not install the alternatives for clang-format
+# and clang-tidy, so we need to manually install those.
+RUN if grep -q 18.04 /etc/lsb-release; then \
+      apt update && apt install -y clang-tidy clang-format-7; \
+      update-alternatives --install /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-6.0 100; \
+      update-alternatives --install /usr/bin/clang-format clang-format /usr/bin/clang-format-7 100; \
+    fi
+
+# Install the the buildifier tool, which does not compile with the default
+# golang compiler for Ubuntu 16.04 and Ubuntu 18.04.
+RUN wget -q -O /usr/bin/buildifier https://github.com/bazelbuild/buildtools/releases/download/0.17.2/buildifier
+RUN chmod 755 /usr/bin/buildifier
+
+# Install cmake_format to automatically format the CMake list files.
+#     https://github.com/cheshirekow/cmake_format
+# Pin this to an specific version because the formatting changes when the
+# "latest" version is updated, and we do not want the builds to break just
+# because some third party changed something.
+RUN pip install --upgrade pip
+RUN pip install numpy cmake_format==0.5.2
+
+# Install grpc from source
+WORKDIR /var/tmp/ci
+COPY install-grpc.sh /var/tmp/ci
+RUN /var/tmp/ci/install-grpc.sh