From 077fbea0a773470b70d42824a510c6ecb6e5b17f Mon Sep 17 00:00:00 2001
From: Leonardo Di Donato <leodidonato@gmail.com>
Date: Mon, 20 Jan 2020 20:31:35 +0000
Subject: [PATCH] update(docker/builder): back to centos:7 as base image

Co-authored-by: Lorenzo Fontana <lo@linux.com>
Signed-off-by: Leonardo Di Donato <leodidonato@gmail.com>
---
 docker/builder/Dockerfile              | 29 +++++++++++++++++++++-----
 docker/builder/root/usr/bin/scl_enable |  6 ++++++
 2 files changed, 30 insertions(+), 5 deletions(-)
 create mode 100644 docker/builder/root/usr/bin/scl_enable

diff --git a/docker/builder/Dockerfile b/docker/builder/Dockerfile
index c4e78cb7..e55ef56f 100644
--- a/docker/builder/Dockerfile
+++ b/docker/builder/Dockerfile
@@ -1,4 +1,4 @@
-FROM centos:8
+FROM centos:7
 
 LABEL name="falcosecurity/falco-builder"
 LABEL usage="docker run -v $PWD/..:/source -v $PWD/build:/build falcosecurity/falco-builder cmake"
@@ -18,12 +18,31 @@ ENV BUILD_WARNINGS_AS_ERRORS=${BUILD_WARNINGS_AS_ERRORS}
 ENV MAKE_JOBS=${MAKE_JOBS}
 ENV FALCO_VERSION=${FALCO_VERSION}
 
-RUN dnf update -y
-RUN dnf install 'dnf-command(config-manager)' -y
-RUN dnf config-manager --set-enabled PowerTools -y
-RUN dnf install -y gcc gcc-c++ clang llvm git make which libcurl-devel zlib-devel rpm-build libyaml-devel openssl-devel cmake ncurses-devel c-ares-devel autoconf automake libtool createrepo expect which glibc-static libstdc++-static elfutils-libelf-devel -y
+# build toolchain
+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 libyaml-devel" && \
+    yum -y install --setopt=tsflags=nodocs $INSTALL_PKGS && \
+    rpm -V $INSTALL_PKGS
+
+ARG CMAKE_VERSION=3.5.1
+RUN source scl_source enable devtoolset-7 && \
+    cd /tmp && \
+    curl -L https://github.com/kitware/cmake/releases/download/v${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}
+
+# build dependencies
+RUN yum -y install ncurses-devel libcurl-devel c-ares-devel -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"]
diff --git a/docker/builder/root/usr/bin/scl_enable b/docker/builder/root/usr/bin/scl_enable
new file mode 100644
index 00000000..6646e1a9
--- /dev/null
+++ b/docker/builder/root/usr/bin/scl_enable
@@ -0,0 +1,6 @@
+# IMPORTANT: Do not add more content to this file unless you know what you are doing.
+#            This file is sourced everytime the shell session is opened.
+#
+# This will make scl collection binaries work out of box.
+unset BASH_ENV PROMPT_COMMAND ENV
+source scl_source enable devtoolset-7