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#!/bin/bash
#
# Builds docker image and runs a command under it.
# This is a generic script that is configured with the following variables:
#
# DOCKERFILE_DIR - Directory in which Dockerfile file is located.
# DOCKER_RUN_SCRIPT - Script to run under docker (relative to protobuf repo root)
# OUTPUT_DIR - Directory that will be copied from inside docker after finishing.
# $@ - Extra args to pass to docker run
set -ex
cd $(dirname $0)/..
git_root=$(pwd)
cd -
# Use image name based on Dockerfile location checksum
DOCKER_IMAGE_NAME=$(basename $DOCKERFILE_DIR)_$(sha1sum $DOCKERFILE_DIR/Dockerfile | cut -f1 -d\ )
# Make sure docker image has been built. Should be instantaneous if so.
docker build -t $DOCKER_IMAGE_NAME $DOCKERFILE_DIR
# Ensure existence of ccache directory
CCACHE_DIR=/tmp/protobuf-ccache
mkdir -p $CCACHE_DIR
# Choose random name for docker container
CONTAINER_NAME="build_and_run_docker_$(uuidgen)"
# Run command inside docker
docker run \
"$@" \
-e CCACHE_DIR=$CCACHE_DIR \
-e EXTERNAL_GIT_ROOT="/var/local/jenkins/protobuf" \
-e THIS_IS_REALLY_NEEDED='see https://github.com/docker/docker/issues/14203 for why docker is awful' \
-v "$git_root:/var/local/jenkins/protobuf:ro" \
-v $CCACHE_DIR:$CCACHE_DIR \
-w /var/local/git/protobuf \
--name=$CONTAINER_NAME \
$DOCKER_IMAGE_NAME \
bash -l "/var/local/jenkins/protobuf/$DOCKER_RUN_SCRIPT" || FAILED="true"
# Copy output artifacts
if [ "$OUTPUT_DIR" != "" ]
then
docker cp "$CONTAINER_NAME:/var/local/git/protobuf/$OUTPUT_DIR" "$git_root" || FAILED="true"
fi
# remove the container, possibly killing it first
docker rm -f $CONTAINER_NAME || true
if [ "$FAILED" != "" ]
then
exit 1
fi
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