agent: detect required Go version from versions.yaml

Detect the Go version required to build the agent from the versions.yaml
file in the runtime repository.

Fixes: #291

Signed-off-by: Marco Vedovati <mvedovati@suse.com>

.ci/lib.sh

@@ -20,6 +20,5 @@ clone_tests_repo()
 
 run_static_checks()
 {
-	clone_tests_repo
 	bash "$tests_repo_dir/.ci/static-checks.sh" "github.com/kata-containers/osbuilder"
 }

.ci/setup.sh

@@ -22,8 +22,13 @@ elif [ "$ID" == ubuntu ];then
 	sudo apt-get -qq update
 	sudo apt-get install -y -qq make automake qemu-utils python-pip coreutils moreutils bc
 	sudo pip install yamllint
-else 
+else
 	echo "Linux distribution not supported"
 fi
 
+
+clone_tests_repo
 bash "${cidir}/static-checks.sh"
+# yq needed to correctly parse runtime/versions.yaml
+make -C ${tests_repo_dir} install-yq
+

rootfs-builder/alpine/Dockerfile.in

@@ -5,4 +5,14 @@
 
 From golang:@GO_VERSION@-alpine
 
-RUN apk update && apk add git make bash gcc musl-dev linux-headers apk-tools-static libseccomp libseccomp-dev
+RUN apk update && apk add \
+    git \
+    make \
+    bash \
+    gcc \
+    musl-dev \
+    linux-headers \
+    apk-tools-static \
+    libseccomp \
+    libseccomp-dev \
+    curl

rootfs-builder/centos/Dockerfile.in

@@ -7,7 +7,15 @@ From centos:@OS_VERSION@
 
 @SET_PROXY@
 
-RUN yum -y update && yum install -y git make gcc coreutils libseccomp libseccomp-devel chrony
+RUN yum -y update && yum install -y \
+git \
+make \
+gcc \
+coreutils \
+libseccomp \
+libseccomp-devel \
+chrony \
+curl
 
 # This will install the proper golang to build Kata components
 @INSTALL_GO@

rootfs-builder/clearlinux/Dockerfile.in

@@ -7,7 +7,16 @@ From fedora:27
 
 @SET_PROXY@
 
-RUN dnf -y update && dnf install -y git systemd pkgconfig gcc coreutils libseccomp libseccomp-devel chrony
+RUN dnf -y update && dnf install -y \
+git \
+systemd \
+pkgconfig \
+gcc \
+coreutils \
+libseccomp \
+libseccomp-devel \
+chrony \
+curl
 
 # This will install the proper golang to build Kata components
 @INSTALL_GO@

rootfs-builder/euleros/Dockerfile.in

@@ -7,7 +7,14 @@ FROM euleros:@OS_VERSION@
 
 @SET_PROXY@
 
-RUN yum -y update && yum install -y yum git make gcc coreutils chrony
+RUN yum -y update && yum install -y \
+yum \
+git \
+make \
+gcc \
+coreutils \
+chrony \
+curl
 
 # This will install the proper golang to build Kata components
 @INSTALL_GO@

rootfs-builder/fedora/Dockerfile.in

@@ -7,7 +7,17 @@ From fedora:@OS_VERSION@
 
 @SET_PROXY@
 
-RUN dnf -y update && dnf install -y git redhat-release systemd pkgconfig gcc make libseccomp libseccomp-devel chrony
+RUN dnf -y update && dnf install -y \
+git \
+redhat-release \
+systemd \
+pkgconfig \
+gcc \
+make \
+libseccomp \
+libseccomp-devel \
+chrony \
+curl
 
 # This will install the proper golang to build Kata components
 @INSTALL_GO@

rootfs-builder/rootfs.sh

@@ -17,6 +17,7 @@ AGENT_INIT=${AGENT_INIT:-no}
 KERNEL_MODULES_DIR=${KERNEL_MODULES_DIR:-""}
 OSBUILDER_VERSION="unknown"
 DOCKER_RUNTIME=${DOCKER_RUNTIME:-runc}
+GO_VERSION=
 export GOPATH=${GOPATH:-${HOME}/go}
 
 lib_file="${script_dir}/../scripts/lib.sh"
@@ -25,9 +26,6 @@ source "$lib_file"
 # Default architecture
 ARCH=$(uname -m)
 
-# Load default versions for golang and other componets
-source "${script_dir}/versions.txt"
-
 # distro-specific config file
 typeset -r CONFIG_SH="config.sh"
 
@@ -247,6 +245,18 @@ error_handler()
 	fi
 }
 
+detect_go_version()
+{
+	typeset -r yq=$(command -v yq || command -v ${GOPATH}/bin/yq)
+	[ -z "$yq" ] && die "'yq' application not found (needed to parsing minimum Go version required)"
+
+	typeset -r runtimeVersion="${AGENT_VERSION:-master}"
+	typeset -r runtimeVersionsURL="https://raw.githubusercontent.com/kata-containers/runtime/${runtimeVersion}/versions.yaml"
+
+	GO_VERSION=$(curl -sSL "${runtimeVersionsURL}" | $yq r - languages.golang.version)
+	info "Detected Go version: $GO_VERSION"
+}
+
 while getopts a:hlo:r:t: opt
 do
 	case $opt in
@@ -311,6 +321,8 @@ fi
 
 mkdir -p ${ROOTFS_DIR}
 
+detect_go_version
+
 if [ -n "${USE_DOCKER}" ] ; then
 	image_name="${distro}-rootfs-osbuilder"
 

rootfs-builder/versions.txt

@@ -1 +0,0 @@
-GO_VERSION=1.11.1