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+#!/bin/bash
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+
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+#
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+# Copyright (c) Contributors to the Open 3D Engine Project.
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+# For complete copyright and license terms please see the LICENSE at the root of this distribution.
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+#
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+# SPDX-License-Identifier: Apache-2.0 OR MIT
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+#
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+
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+# TEMP_FOLDER and TARGET_INSTALL_ROOT get set from the pull_and_build_from_git.py script
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+
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+# Determine the host architecture
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+CURRENT_HOST_ARCH=$(uname -m)
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+
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+# Use the host architecture if not supplied
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+TARGET_ARCH=${1:-$(uname -m)}
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+
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+# If the host and target architecture does not match, make sure the necessary cross compilation packages are installed
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+if [ "${CURRENT_HOST_ARCH}" != ${TARGET_ARCH} ]
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+then
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+ echo "Checking cross compiling requirements."
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+ for package_check in docker-ce qemu binfmt-support qemu-user-static
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+ do
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+ echo "Checking package $package_check"
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+ dpkg -s $package_check > /dev/null 2>&1
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+ if [ $? -ne 0 ]
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+ then
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+ echo ""
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+ echo "Missing package $package_check. Make sure to install it with your local package manager."
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+ echo ""
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+ exit 1
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+ fi
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+ done
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+
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+ # Only cross compilation of an ARM64 image on an x86_64 host is supported
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+ if [ "${TARGET_ARCH}" = "aarch64" ]
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+ then
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+ # Make sure qemu-aarch64 is installed properly
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+ QEMU_AARCH_COUNT=$(update-binfmts --display | grep qemu-aarch64 | wc -l)
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+ if [ $QEMU_AARCH_COUNT -eq 0 ]
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+ then
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+ echo ""
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+ echo "QEMU aarch64 binary format not registered."
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+ echo "Run the following command to register"
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+ echo ""
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+ echo "sudo docker run --rm --privileged multiarch/qemu-user-static --reset -p yes"
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+ echo ""
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+ exit 1
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+ fi
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+ echo ""
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+ echo "Cross compiling aarch64 on an amd64 machine validated."
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+ echo ""
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+ fi
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+else
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+ echo "Building ${TARGET_ARCH} natively."
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+fi
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+
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+# Set the library name prefix to lz4
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+LIB_NAME="lz4"
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+
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+# Setup the docker arguments for the target architecture
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+if [ "${TARGET_ARCH}" = "x86_64" ]
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+then
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+ echo "Processing Docker for x86_64"
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+ TARGET_DOCKER_FILE=Dockerfile.x86_64
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+ TARGET_DOCKER_PLATFORM_ARG=linux/amd64
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+ DOCKER_IMAGE_NAME=${LIB_NAME}_linux_3p
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+elif [ "${TARGET_ARCH}" = "aarch64" ]
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+then
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+ echo "Processing Docker for aarch64"
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+ TARGET_DOCKER_FILE=Dockerfile.aarch64
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+ TARGET_DOCKER_PLATFORM_ARG=linux/arm64v8
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+ DOCKER_IMAGE_NAME=${LIB_NAME}_linux_aarch64_3p
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+else
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+ echo "Unsupported architecture ${TARGET_ARCH}"
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+ exit 1
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+fi
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+
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+# Make sure docker is installed
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+DOCKER_VERSION=$(docker --version)
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+if [ $? -ne 0 ]
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+then
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+ echo "Required package docker is not installed"
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+ echo "Follow instructions on https://docs.docker.com/engine/install/ubuntu/ to install docker properly"
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+ exit 1
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+fi
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+echo "Detected Docker Version $DOCKER_VERSION"
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+
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+DOCKER_BUILD_SCRIPT=docker_build_${LIB_NAME}_linux.sh
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+
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+if [ ! -f $DOCKER_BUILD_SCRIPT ]
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+then
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+ echo "Invalid docker build script ${DOCKER_BUILD_SCRIPT}"
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+ exit 1
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+fi
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+
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+# Prepare the docker file and use the temp folder as the context root
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+cp -f ${DOCKER_BUILD_SCRIPT} temp/
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+
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+pushd temp
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+
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+# Build the Docker Image
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+echo "Building the docker build script for ${DOCKER_IMAGE_NAME}"
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+docker build --platform ${TARGET_DOCKER_PLATFORM_ARG} --build-arg DOCKER_BUILD_SCRIPT=$DOCKER_BUILD_SCRIPT -f ${TEMP_FOLDER}/../${TARGET_DOCKER_FILE} -t ${DOCKER_IMAGE_NAME}:latest ${TEMP_FOLDER}
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+if [ $? -ne 0 ]
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+then
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+ echo "Error occurred creating Docker image ${DOCKER_IMAGE_NAME}:latest."
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+ echo "The following command failed:"
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+ echo ""
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+ echo "docker build --platform ${TARGET_DOCKER_PLATFORM_ARG} --build-arg DOCKER_BUILD_SCRIPT=$DOCKER_BUILD_SCRIPT -f ${TEMP_FOLDER}/../${TARGET_DOCKER_FILE} -t ${DOCKER_IMAGE_NAME}:latest ${TEMP_FOLDER}"
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+ echo ""
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+ exit 1
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+fi
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+
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+
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+# Capture the Docker Image ID
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+IMAGE_ID=$(docker images -q ${DOCKER_IMAGE_NAME}:latest)
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+if [ -z $IMAGE_ID ]
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+then
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+ echo "Error: Cannot find Image ID for ${DOCKER_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+
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+# Run the Docker Image
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+echo "Running build script in the docker image"
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+docker run --platform ${TARGET_DOCKER_PLATFORM_ARG} --tty ${DOCKER_IMAGE_NAME}:latest /data/workspace/${DOCKER_BUILD_SCRIPT}
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+if [ $? -ne 0 ]
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+then
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+ echo Failed to build from docker image ${DOCKER_IMAGE_NAME}:latest
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+ echo "The following command failed:"
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+ echo ""
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+ echo "docker run --platform ${TARGET_DOCKER_PLATFORM_ARG} -it --tty ${DOCKER_IMAGE_NAME}:latest"
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+ echo ""
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+ exit 1
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+fi
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+
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+
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+# Capture the container ID
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+echo "Capturing the Container ID"
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+CONTAINER_ID=$(docker container ls -l -q --filter "ancestor=${DOCKER_IMAGE_NAME}:latest")
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+if [ -z $CONTAINER_ID ]
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+then
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+ echo "Error: Cannot find Container ID for Image ${DOCKER_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+
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+# Copy the build artifacts from the Docker Container
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+echo "Copying the built contents from the docker container for image ${DOCKER_IMAGE_NAME}"
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+
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+mkdir -p build
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+docker cp --quiet $CONTAINER_ID:/data/workspace/package/. build
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+if [ $? -ne 0 ]
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+then
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+ echo "Error occurred copying build artifacts from Docker image ${DOCKER_IMAGE_NAME}:latest."
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+ exit 1
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+fi
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+
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+
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+# Clean up the docker image and container
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+echo "Cleaning up container"
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+docker container rm $CONTAINER_ID || (echo "Warning: unable to clean up container for image ${DOCKER_IMAGE_NAME}")
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+
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+echo "Cleaning up image"
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+docker rmi --force $IMAGE_ID || (echo "Warning: unable to clean up image ${DOCKER_IMAGE_NAME}")
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+
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+popd
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+
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+exit 0
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