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+#!/bin/bash
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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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+# 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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+ 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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+cp docker_build_linux.sh temp/
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+
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+# The ISPCTextureCompressor relies on the ispc compiler (v1.16.1) from https://github.com/ispc/ispc.git
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+# This will be cloned from https://github.com/ispc/ispc.git (branch v1.16.1) and built with the supplied
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+# ubuntu 20.04 docker script (docker/ubuntu/20.04/cpu_ispc_build/Dockerfile) and the resulting docker
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+# image will be used to provide the build environment as well as the required ispc tool needed to
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+# build the ISPCTextureCompressor
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+echo "Cloning ispc v1.16.1 from git"
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+
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+rm -rf temp/ispc
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+
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+git clone https://github.com/ispc/ispc.git --branch v1.16.1 --depth 1 temp/ispc
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+if [ $? -ne 0 ]
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+then
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+ echo "Error occurred cloning ispc from https://github.com/ispc/ispc.git"
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+ exit 1
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+fi
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+
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+# If this is aarch64, we need a special patch
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+if [ "$(uname -m)" = "aarch64" ]
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+then
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+ echo "Applying aarch64 patch"
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+ git -C temp/ispc apply ../ispc_linux_patch_arm64.txt
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+fi
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+
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+DOCKER_ISPC_ENV_IMAGE_NAME=ispc_cpu_env
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+docker build --build-arg SHA=v1.16.1 -t ${DOCKER_ISPC_ENV_IMAGE_NAME}:latest temp/ispc/docker/ubuntu/20.04/cpu_ispc_build/ -f temp/ispc/docker/ubuntu/20.04/cpu_ispc_build/Dockerfile
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+if [ $? -ne 0 ]
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+then
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+ echo "Error building docker image ${DOCKER_ISPC_ENV_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+# Capture the Docker Image ID for ${DOCKER_ISPC_ENV_IMAGE_NAME}
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+DOCKER_ISPC_ENV_IMAGE_ID=$(docker images -q ${DOCKER_ISPC_ENV_IMAGE_NAME}:latest)
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+if [ -z $DOCKER_ISPC_ENV_IMAGE_ID ]
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+then
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+ echo "Error: Cannot find Image ID for ${DOCKER_ISPC_ENV_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+# Using the ispc compiler docker as a base, prepare the docker image to build the ISPCTextureComp library
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+DOCKER_ISPC_BUILD_IMAGE_NAME=ispc_text_comp
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+
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+# Build the image from the base ispc docker to prepare
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+docker build -t ${DOCKER_ISPC_BUILD_IMAGE_NAME}:latest -f Dockerfile.linux temp
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+if [ $? -ne 0 ]
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+then
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+ echo "Error building docker image ${DOCKER_ISPC_BUILD_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+# Capture the Docker Image ID for ${DOCKER_ISPC_BUILD_IMAGE_NAME}
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+DOCKER_ISPC_BUILD_IMAGE_ID=$(docker images -q ${DOCKER_ISPC_BUILD_IMAGE_NAME}:latest)
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+if [ -z $DOCKER_ISPC_BUILD_IMAGE_ID ]
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+then
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+ echo "Error: Cannot find Image ID for ${DOCKER_ISPC_BUILD_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+# Run the build command in docker through run.
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+docker run -it ${DOCKER_ISPC_BUILD_IMAGE_NAME}:latest /data/workspace/docker_build_linux.sh
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+if [ $? -ne 0 ]
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+then
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+ echo "Error building ISPCTextureComp library"
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+ exit 1
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+fi
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+
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+echo "Capturing the Container ID for ${DOCKER_ISPC_BUILD_IMAGE_NAME}:latest"
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+DOCKER_ISPC_BUILD_CONTAINER_ID=$(docker container ls -l -q --filter "ancestor=${DOCKER_ISPC_BUILD_IMAGE_NAME}:latest")
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+echo "CI=${DOCKER_ISPC_BUILD_CONTAINER_ID}"
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+if [ -z $DOCKER_ISPC_BUILD_CONTAINER_ID ]
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+then
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+ echo "Error: Cannot find Container ID for Image ${DOCKER_ISPC_BUILD_IMAGE_NAME}"
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+ exit 1
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+fi
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+
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+# Copy the build artifact to a temp folder for the install script
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+rm -rf temp/docker_output
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+mkdir -p temp/docker_output
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+docker cp $DOCKER_ISPC_BUILD_CONTAINER_ID:/data/workspace/src/build/libispc_texcomp.so temp/docker_output/
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+if [ $? -ne 0 ]
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+then
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+ echo "Error occurred copying libispc_texcomp.so from Docker image ${DOCKER_ISPC_BUILD_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 containers"
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+docker container prune -f
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+
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+echo "Cleaning up image"
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+docker rmi --force $DOCKER_ISPC_ENV_IMAGE_ID || (echo "Warning: unable to clean up image ${DOCKER_ISPC_ENV_IMAGE_NAME}")
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+if [ $? -ne 0 ]
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+then
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+ echo "Warning: unable to clean up image ${DOCKER_ISPC_ENV_IMAGE_NAME}"
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+fi
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+docker rmi --force $DOCKER_ISPC_BUILD_IMAGE_ID || (echo "Warning: unable to clean up image ${DOCKER_ISPC_BUILD_IMAGE_NAME}")
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+if [ $? -ne 0 ]
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+then
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+ echo "Warning: unable to clean up image ${DOCKER_ISPC_BUILD_IMAGE_NAME}"
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+fi
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+
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+exit 0
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+
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Steve Pham