#!/usr/bin/env bash

set -xe

# This is the script used by ASF Jenkins to build and check Mesos for
# a given OS and compiler combination.

# Require the following environment variables to be set.
: ${OS:?"Environment variable 'OS' must be set (e.g., OS=ubuntu:14.04)"}
: ${BUILDTOOL:?"Environment variable 'BUILDTOOL' must be set (e.g., BUILDTOOL=autotools)"}
: ${COMPILER:?"Environment variable 'COMPILER' must be set (e.g., COMPILER=gcc)"}
: ${CONFIGURATION:?"Environment variable 'CONFIGURATION' must be set (e.g., CONFIGURATION='--enable-libevent --enable-ssl')"}
: ${ENVIRONMENT:?"Environment variable 'ENVIRONMENT' must be set (e.g., ENVIRONMENT='GLOG_v=1 MESOS_VERBOSE=1')"}

# Change to the root of Mesos repo for docker build context.
MESOS_DIRECTORY=$( cd "$( dirname "$0" )/.." && pwd )
cd "$MESOS_DIRECTORY"

# TODO(vinod): Once ASF CI supports Docker 1.5 use a custom name for
# Dockerfile to avoid overwriting Dockerfile (if it exists) at the root
# of the repo.
DOCKERFILE="Dockerfile"

rm -f $DOCKERFILE # Just in case a stale one exists.

# Helper function that appends instructions to docker file.
function append_dockerfile {
   echo $1 >> $DOCKERFILE
}


# TODO(vinod): Add support for Fedora and Debian.
case $OS in
  centos*)
    # NOTE: Currently we only support CentOS7+ due to the
    # compiler versions needed to compile Mesos.

    append_dockerfile "FROM $OS"

    # Install dependencies.

    append_dockerfile "RUN yum install -y which"
    append_dockerfile "RUN yum groupinstall -y 'Development Tools'"
    append_dockerfile "RUN yum install -y epel-release" # Needed for clang.
    append_dockerfile "RUN yum install -y clang git maven cmake"
    append_dockerfile "RUN yum install -y java-1.8.0-openjdk-devel python-devel python-six zlib-devel libcurl-devel openssl-devel cyrus-sasl-devel cyrus-sasl-md5 apr-devel subversion-devel apr-utils-devel libevent-devel libev-devel"

    # Add an unprivileged user.
    append_dockerfile "RUN adduser mesos"
   ;;
  *ubuntu*)
    # NOTE: Currently we only support Ubuntu13.10+ due to the
    # compiler versions needed to compile Mesos.

    append_dockerfile "FROM $OS"

    # NOTE: We need to do this to fix some flakiness while fetching packages.
    # See https://bugs.launchpad.net/ubuntu/+source/apt/+bug/972077
    append_dockerfile "RUN rm -rf /var/lib/apt/lists/*"

    # Install dependencies.
    # IBM Power only supports Ubuntu 14.04 and gcc compiler.
    [ "$(uname -m)" = "x86_64" ] && CLANG_PKG=clang-3.5 || CLANG_PKG=
    append_dockerfile "RUN apt-get update"
    append_dockerfile "RUN apt-get -y install build-essential $CLANG_PKG git maven autoconf libtool cmake"
    append_dockerfile "RUN apt-get -y install openjdk-7-jdk python-dev python-six libcurl4-nss-dev libsasl2-dev libapr1-dev libsvn-dev libevent-dev libev-dev"
    append_dockerfile "RUN apt-get -y install wget curl sed"

    # Add an unpriviliged user.
    append_dockerfile "RUN adduser --disabled-password --gecos '' mesos"
    ;;
  *)
    echo "Unknown OS $OS"
    exit 1
    ;;
esac

case $COMPILER in
  gcc)
    append_dockerfile "ENV CC gcc"
    append_dockerfile "ENV CXX g++"
    ;;
  clang)
    case $OS in
    *ubuntu*)
      append_dockerfile "ENV CC clang-3.5"
      append_dockerfile "ENV CXX clang++-3.5"
      ;;
    *)
      append_dockerfile "ENV CC clang"
      append_dockerfile "ENV CXX clang++"
      ;;
    esac
    ;;
  *)
    echo "Unknown Compiler $COMPILER"
    exit 1
    ;;
esac


# Set working directory.
append_dockerfile "WORKDIR mesos"

# Copy Mesos source tree into the image.
append_dockerfile "COPY . /mesos/"

# NOTE: We run all the tests as unprivileged 'mesos' user because
# we need to fix cgroups related tests to work inside Docker; certain
# tests (e.g., ContainerizerTest) enable cgroups isolation if the user
# is 'root'.
# TODO(vinod): Fix cgroups tests to work inside Docker.
append_dockerfile "RUN chown -R mesos /mesos"
append_dockerfile "USER mesos"

# Generate xml reports to be displayed by jenkins xUnit plugin.
append_dockerfile "ENV GTEST_OUTPUT xml:report.xml"

# Ensure `make distcheck` inherits configure flags.
append_dockerfile "ENV DISTCHECK_CONFIGURE_FLAGS $CONFIGURATION"

# Set the environment for build.
append_dockerfile "ENV $ENVIRONMENT"

# Perform coverity build if requested.
if [ -n "$COVERITY_TOKEN" ]
 then
   # Note currently the coverity build is only tested with ubuntu:14:04, autotools, and gcc.

    # Download coverity tools, build using coverity wrapper and upload results.
    append_dockerfile "ENV MESOS_VERSION $(grep "AC_INIT" configure.ac | sed 's/AC_INIT[(]\[mesos\], \[\(.*\)\][)]/\1/')"
    append_dockerfile "RUN wget https://scan.coverity.com/download/linux64  --post-data \"token=$COVERITY_TOKEN&project=Mesos\" -O coverity_tool.tgz"
    append_dockerfile "RUN tar xvf coverity_tool.tgz; mv cov-analysis-linux* cov-analysis"
    append_dockerfile "CMD ./bootstrap && ./configure $CONFIGURATION &&  cov-analysis/bin/cov-build -dir cov-int make -j6 && tar czcf mesos.tgz cov-int && tail cov-int/build-log.txt && curl --form \"token=$COVERITY_TOKEN\" --form \"email=dev@mesos.apache.org\"  --form \"file=@mesos.tgz\" --form \"version=$MESOS_VERSION\" --form \"description='Continious Coverity Build'\"   https://scan.coverity.com/builds?project=Mesos"
else
    # Build and check Mesos.
    case $BUILDTOOL in
      autotools)
	append_dockerfile "CMD ./bootstrap && ./configure $CONFIGURATION && make -j6 distcheck 2>&1"
	;;
      cmake)
	# Transform autotools-like parameters to cmake-like.
	# Remove "'".
	CONFIGURATION=${CONFIGURATION//\'/""}
	# Replace "-" with "_".
	CONFIGURATION=${CONFIGURATION//-/"_"}
	# Replace "__" with "-D".
	CONFIGURATION=${CONFIGURATION//__/"-D"}
	# To Upper Case.
	CONFIGURATION=${CONFIGURATION^^}

	# Add "=1" suffix to each variable.
	IFS=' ' read -r  -a array <<< "$CONFIGURATION"

	CONFIGURATION=""
	for element in "${array[@]}"
	do
	    CONFIGURATION="$CONFIGURATION $element=1"
	done

	# MESOS-5433: `distcheck` is not supported.
	# MESOS-5624: In source build is not supported.
	append_dockerfile "CMD mkdir build && cd build && cmake $CONFIGURATION .. && make -j6 check"
	;;
      *)
	echo "Unknown build tool $BUILDTOOL"
	exit 1
	;;
    esac
fi

# Generate a random image tag.
TAG=mesos-`date +%s`-$RANDOM

# Build the Docker image.
# TODO(vinod): Instead of building Docker images on the fly host the
# images on DockerHub and use them.
docker build --no-cache=true -t $TAG .

# Set a trap to delete the image on exit.
trap "docker rmi $TAG" EXIT

# Uncomment below to print kernel log incase of failures.
# trap "dmesg" ERR

# Now run the image.
# NOTE: We run in 'privileged' mode to circumvent permission issues
# with AppArmor. See https://github.com/docker/docker/issues/7276.
docker run --privileged --rm $TAG