update: centos 7 falco builder

Signed-off-by: Leonardo Di Donato <leodidonato@gmail.com>

docker/builder/Dockerfile

@@ -1,61 +1,54 @@
-FROM centos:6
+FROM centos:7
 
-ENV FALCO_VERSION 0.1.1dev
-ENV BUILD_TYPE Release
-ENV BUILD_DRIVER OFF
-ENV BUILD_BPF OFF
-ENV BUILD_WARNINGS_AS_ERRORS ON
-ENV MAKE_JOBS 4
+LABEL name="falcosecurity/falco-builder"
+LABEL usage="docker run -v /etc/passwd:/etc/passwd:ro -v $PWD/..:/source -v $PWD/build:/build falcosecurity/falco-builder"
+
+ARG BUILD_TYPE=release
+ARG BUILD_DRIVER=OFF
+ARG BUILD_BPF=OFF
+ARG BUILD_WARNINGS_AS_ERRORS=ON
+ARG MAKE_JOBS=4
+
+ENV BUILD_TYPE=${BUILD_TYPE}
+ENV BUILD_DRIVER=${BUILD_DRIVER}
+ENV BUILD_BPF=${BUILD_BPF}
+ENV BUILD_WARNINGS_AS_ERRORS=${BUILD_WARNINGS_AS_ERRORS}
+ENV MAKE_JOBS=${MAKE_JOBS}
 
 ARG DOCKER_VERSION=1.11.0
-ARG CMAKE_VERSION=3.14.5
-
-RUN curl -o /etc/yum.repos.d/devtools-2.repo https://people.centos.org/tru/devtools-2/devtools-2.repo && \
-        rpm -i http://mirror.pnl.gov/epel/6/i386/epel-release-6-8.noarch.rpm && \
-        sed -e 's,$basearch,i386,' -e 's,$releasever\],$releasever-i686\],' /etc/yum.repos.d/devtools-2.repo > /etc/yum.repos.d/devtools-2-i686.repo && \
-        yum -y install \
-        createrepo \
-        devtoolset-2-toolchain \
-        dpkg \
-        dpkg-devel \
-        expect \
-        gcc \
-        gcc-c++ \
-        git \
-        glibc-static \
-        libcurl-devel \
-        make \
-        curl \
-        zlib-devel \
-        pkg-config \
-        rpm-build \
-        unzip \
-        wget \
-        tar \
-        autoconf \
-        automake \
-        libtool && \
-        yum -y install \
-        glibc-devel.i686 \
-        devtoolset-2-libstdc++-devel.i686 \
-        devtoolset-2-elfutils-libelf-devel && \
-        yum clean all
-RUN curl -o docker.tgz https://get.docker.com/builds/Linux/x86_64/docker-${DOCKER_VERSION}.tgz && \
-        tar xfz docker.tgz docker/docker && \
-        mv docker/docker /usr/local/bin/docker && \
-        chmod +x /usr/local/bin/docker && \
-        rm -fr docker.tgz docker/
-RUN . /opt/rh/devtoolset-2/enable && \
-        cd /tmp && \
-        wget -nv -O - /~https://github.com/kitware/cmake/releases/download/v$CMAKE_VERSION/cmake-${CMAKE_VERSION}.tar.gz | tar zx; \
-        cd /tmp/cmake-${CMAKE_VERSION} && \
-        ./bootstrap --system-curl && \
-        make -j${MAKE_JOBS} && \
-        make install && \
-        rm -rf /tmp/cmake-${CMAKE_VERSION}
-
-# TEMPORARY until dependencies in CMakeLists.txt are fixed
+ARG CMAKE_VERSION=3.5.0
+
+RUN yum -y install centos-release-scl && \
+    INSTALL_PKGS="devtoolset-7-gcc devtoolset-7-gcc-c++ devtoolset-7-toolchain devtoolset-7-libstdc++-devel devtoolset-7-elfutils-libelf-devel glibc-static autoconf automake libtool createrepo expect git which libcurl-devel zlib-devel rpm-build" && \
+    yum -y install --setopt=tsflags=nodocs $INSTALL_PKGS && \
+    rpm -V $INSTALL_PKGS
+
+RUN source scl_source enable devtoolset-7 && \
+    cd /tmp && \
+    curl -L /~https://github.com/kitware/cmake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}.tar.gz | tar xz; \
+    cd cmake-${CMAKE_VERSION} && \
+    ./bootstrap --system-curl && \
+    make -j${MAKE_JOBS} && \
+    make install && \
+    rm -rf /tmp/cmake-${CMAKE_VERSION}
+
+RUN cd /tmp && \
+    curl -L https://get.docker.com/builds/Linux/x86_64/docker-${DOCKER_VERSION}.tgz | tar xz; \
+    mv docker/docker /usr/local/bin/docker && \
+    chmod +x /usr/local/bin/docker && \
+    rm -rf /tmp/docker
+
+# Note: Needs a fix into CMakeLists.txt # gcc gcc-c++
 RUN yum -y install libyaml-devel
-COPY entrypoint.sh /
 
-ENTRYPOINT ["/entrypoint.sh"]
+RUN yum clean all -y
+
+COPY ./root /
+
+# DTS
+ENV BASH_ENV=/usr/bin/scl_enable \
+    ENV=/usr/bin/scl_enable \
+    PROMPT_COMMAND=". /usr/bin/scl_enable"
+
+ENTRYPOINT ["entrypoint"]
+CMD ["usage"]