chore: create a new Dockerfile (#3474)

In this PR:
- Create a Dockerfile to use recommended OS image from Airlock.

b/384540059

.cloudbuild/library_generation/cloudbuild-library-generation-push-prod.yaml

@@ -27,7 +27,9 @@ steps:
       "-t", "${_SHA_IMAGE_ID}",
       "-t", "${_LATEST_IMAGE_ID}",
       "-t", "${_VERSIONED_IMAGE_ID}",
-      "--file", ".cloudbuild/library_generation/library_generation.Dockerfile", "."]
+      "-f", ".cloudbuild/library_generation/library_generation_airlock.Dockerfile",
+      "."
+    ]
     id: library-generation-build
     waitFor: ["-"]
     env: 

.cloudbuild/library_generation/library_generation_airlock.Dockerfile

@@ -0,0 +1,147 @@
+# Copyright 2024 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
+#
+#     https://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.
+
+# install gapic-generator-java in a separate layer so we don't overload the image
+# with the transferred source code and jars
+
+# 3.9.9-eclipse-temurin-11-alpine
+FROM us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/maven@sha256:d3f04985c6a68415e36c0a6468d0f8316f27d4dbee77bc459257ba444224bd9f AS ggj-build
+
+WORKDIR /sdk-platform-java
+COPY . .
+# {x-version-update-start:gapic-generator-java:current}
+ENV DOCKER_GAPIC_GENERATOR_VERSION="2.51.1-SNAPSHOT"
+# {x-version-update-end}
+
+RUN mvn install -B -ntp -DskipTests -Dclirr.skip -Dcheckstyle.skip
+RUN cp "/root/.m2/repository/com/google/api/gapic-generator-java/${DOCKER_GAPIC_GENERATOR_VERSION}/gapic-generator-java-${DOCKER_GAPIC_GENERATOR_VERSION}.jar" \
+  "./gapic-generator-java.jar"
+
+# 3.20.1
+FROM us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/alpine@sha256:dabf91b69c191a1a0a1628fd6bdd029c0c4018041c7f052870bb13c5a222ae76 as glibc-compat
+
+RUN apk update && apk add git sudo
+# This SHA is the latest known-to-work version of this binary compatibility tool
+ARG GLIB_MUS_SHA=e94aca542e3ab08b42aa0b0d6e72478b935bb8e8
+WORKDIR /home
+
+# Install compatibility layer to run glibc-based programs (such as the
+# grpc plugin).
+# Alpine, by default, only supports musl-based binaries, and there is no public
+# downloadable distribution of the grpc plugin that is Alpine (musl) compatible.
+# This is one of the recommended approaches to ensure glibc-compatibility
+# as per https://wiki.alpinelinux.org/wiki/Running_glibc_programs
+RUN git clone https://gitlab.com/manoel-linux1/GlibMus-HQ.git
+WORKDIR /home/GlibMus-HQ
+# We lock the tool to the latest known-to-work version
+RUN git checkout "${GLIB_MUS_SHA}"
+RUN chmod a+x compile-x86_64-alpine-linux.sh
+RUN sh compile-x86_64-alpine-linux.sh
+
+# 3.12.7-alpine3.20
+FROM us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/python@sha256:b83d5ec7274bee17d2f4bd0bfbb082f156241e4513f0a37c70500e1763b1d90d as final
+
+ARG OWLBOT_CLI_COMMITTISH=8b7d94b4a8ad0345aeefd6a7ec9c5afcbeb8e2d7
+ARG PROTOC_VERSION=25.5
+ARG GRPC_VERSION=1.69.0
+ARG JAVA_FORMAT_VERSION=1.7
+ENV HOME=/home
+ENV OS_ARCHITECTURE="linux-x86_64"
+
+# install OS tools
+RUN apk update && apk add unzip curl rsync openjdk11 jq bash nodejs npm git
+
+SHELL [ "/bin/bash", "-c" ]
+
+# Copy glibc shared objects to enable execution of the grpc plugin.
+# This list was obtained via `libtree -pvvv /grpc/*` in the final container as
+# well as inspecting the modifications done by compile-x86_64-alpine-linux.sh
+# in the glibc-compat stage using the `dive` command.
+COPY --from=glibc-compat /etc/libgcc* /etc/
+COPY --from=glibc-compat /lib64/ld-linux-x86-64.so.2 /lib64/
+COPY --from=glibc-compat /lib/GLIBCFAKE.so.0 /lib/
+COPY --from=glibc-compat /lib/ld-linux-x86-64.so.2 /lib/
+COPY --from=glibc-compat /lib/libpthread* /lib/
+COPY --from=glibc-compat /lib/libucontext* /lib/
+COPY --from=glibc-compat /lib/libc.* /lib/
+COPY --from=glibc-compat /usr/lib/libgcc* /usr/lib/
+COPY --from=glibc-compat /usr/lib/libstdc* /usr/lib/
+COPY --from=glibc-compat /usr/lib/libobstack* /usr/lib/
+
+
+# copy source code
+COPY hermetic_build/common /src/common
+COPY hermetic_build/library_generation /src/library_generation
+
+# install protoc
+WORKDIR /protoc
+RUN source /src/library_generation/utils/utilities.sh \
+	&& download_protoc "${PROTOC_VERSION}" "${OS_ARCHITECTURE}"
+# we indicate protoc is available in the container via env vars
+ENV DOCKER_PROTOC_LOCATION=/protoc/bin
+ENV DOCKER_PROTOC_VERSION="${PROTOC_VERSION}"
+
+# install grpc
+WORKDIR /grpc
+RUN source /src/library_generation/utils/utilities.sh \
+	&& download_grpc_plugin "${GRPC_VERSION}" "${OS_ARCHITECTURE}"
+# similar to protoc, we indicate grpc is available in the container via env vars
+ENV DOCKER_GRPC_LOCATION="/grpc/protoc-gen-grpc-java.exe"
+
+# Here we transfer gapic-generator-java from the previous stage.
+# Note that the destination is a well-known location that will be assumed at runtime
+# We hard-code the location string to avoid making it configurable (via ARG) as
+# well as to avoid it making it overridable at runtime (via ENV).
+COPY --from=ggj-build "/sdk-platform-java/gapic-generator-java.jar" "${HOME}/.library_generation/gapic-generator-java.jar"
+RUN chmod 755 "${HOME}/.library_generation/gapic-generator-java.jar"
+ENV GAPIC_GENERATOR_LOCATION="${HOME}/.library_generation/gapic-generator-java.jar"
+
+RUN python -m pip install --upgrade pip
+
+# install main scripts as a python package
+WORKDIR /
+RUN python -m pip install --require-hashes -r src/common/requirements.txt
+RUN python -m pip install src/common
+RUN python -m pip install --require-hashes -r src/library_generation/requirements.txt
+RUN python -m pip install src/library_generation
+
+# install the owl-bot CLI
+WORKDIR /tools
+RUN git clone https://github.com/googleapis/repo-automation-bots
+WORKDIR /tools/repo-automation-bots/packages/owl-bot
+RUN git checkout "${OWLBOT_CLI_COMMITTISH}"
+RUN npm i && npm run compile && npm link
+RUN owl-bot copy-code --version
+RUN chmod o+rx $(which owl-bot)
+RUN apk del -r npm && apk cache clean
+
+# download the Java formatter
+ADD https://maven-central.storage-download.googleapis.com/maven2/com/google/googlejavaformat/google-java-format/${JAVA_FORMAT_VERSION}/google-java-format-${JAVA_FORMAT_VERSION}-all-deps.jar \
+  "${HOME}"/.library_generation/google-java-format.jar
+RUN chmod 755 "${HOME}"/.library_generation/google-java-format.jar
+ENV JAVA_FORMATTER_LOCATION="${HOME}/.library_generation/google-java-format.jar"
+
+# allow users to access the script folders
+RUN chmod -R o+rx /src
+
+# set dummy git credentials for the empty commit used in postprocessing
+# we use system so all users using the container will use this configuration
+RUN git config --system user.email "[email protected]"
+RUN git config --system user.name "Cloud Java Bot"
+
+# allow read-write for /home and execution for binaries in /home/.nvm
+RUN chmod -R a+rw /home
+
+WORKDIR /workspace
+ENTRYPOINT [ "python", "/src/library_generation/cli/entry_point.py", "generate" ]