osbuilder: Skip installing golang for building rootfs

Building rootfs does not depend on golang, delete intalling
golang may save build time.

And there is only rust agent now, the code for golang agent should
be deleted too.

Fixes: #2170

Signed-off-by: bin <bin@hyper.sh>

tools/osbuilder/rootfs-builder/centos/Dockerfile.in

@@ -34,7 +34,6 @@ RUN yum -y update && yum install -y \
     vim \
     which
 
+# This will install the proper packages to build Kata components
 @INSTALL_MUSL@
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/clearlinux/Dockerfile.in

@@ -37,7 +37,6 @@ RUN dnf -y update && dnf install -y \
     vim \
     which
 
-# This will install the proper golang to build Kata components
+# This will install the proper packages to build Kata components
 @INSTALL_MUSL@
-@INSTALL_GO@
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/debian/Dockerfile-aarch64.in

@@ -29,7 +29,6 @@ RUN apt-get update && apt-get install -y \
     systemd \
     tar \
     vim
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
+# This will install the proper packages to build Kata components
 @INSTALL_MUSL@
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/debian/Dockerfile.in

@@ -36,6 +36,5 @@ RUN apt-get update && apt-get --no-install-recommends install -y \
     vim \
     wget
 
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
+# This will install the proper packages to build Kata components
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/fedora/Dockerfile.in

@@ -37,7 +37,6 @@ RUN dnf -y update && dnf install -y \
     vim \
     which
 
-# This will install the proper golang to build Kata components
+# This will install the proper packages to build Kata components
 @INSTALL_MUSL@
-@INSTALL_GO@
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/gentoo/Dockerfile.in

@@ -9,6 +9,5 @@ FROM ${IMAGE_REGISTRY}/gentoo/stage3-amd64:latest
 # This dockerfile needs to provide all the componets need to build a rootfs
 # Install any package need to create a rootfs (package manager, extra tools)
 
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
+# This will install the proper rust to build Kata components
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/rootfs.sh

@@ -13,17 +13,14 @@ set -o errtrace
 script_name="${0##*/}"
 script_dir="$(dirname $(readlink -f $0))"
 AGENT_VERSION=${AGENT_VERSION:-}
-GO_AGENT_PKG=${GO_AGENT_PKG:-github.com/kata-containers/agent}
-RUST_AGENT_PKG=${RUST_AGENT_PKG:-github.com/kata-containers/kata-containers}
-RUST_AGENT=${RUST_AGENT:-yes}
 RUST_VERSION="null"
 MUSL_VERSION=${MUSL_VERSION:-"null"}
 AGENT_BIN=${AGENT_BIN:-kata-agent}
 AGENT_INIT=${AGENT_INIT:-no}
 KERNEL_MODULES_DIR=${KERNEL_MODULES_DIR:-""}
 OSBUILDER_VERSION="unknown"
 DOCKER_RUNTIME=${DOCKER_RUNTIME:-runc}
-GO_VERSION="null"
+# this GOPATH is for installing yq from install_yq.sh
 export GOPATH=${GOPATH:-${HOME}/go}
 LIBC=${LIBC:-musl}
 
@@ -113,9 +110,6 @@ DISTRO_REPO         Use host repositories to install guest packages.
 DOCKER_RUNTIME      Docker runtime to use when USE_DOCKER is set.
                     Default value: runc
 
-GO_AGENT_PKG        URL of the Git repository hosting the agent package.
-                    Default value: ${GO_AGENT_PKG}
-
 GRACEFUL_EXIT       If set, and if the DISTRO configuration specifies a
                     non-empty BUILD_CAN_FAIL variable, do not return with an
                     error code in case any of the build step fails.
@@ -134,12 +128,6 @@ KERNEL_MODULES_DIR  Path to a directory containing kernel modules to include in
 ROOTFS_DIR          Path to the directory that is populated with the rootfs.
                     Default value: <${script_name} path>/rootfs-<DISTRO-name>
 
-RUST_AGENT          When set to "no", build kata-agent from go agent instead of kata-rust-agent
-                    Default value: "yes"
-
-RUST_AGENT_PKG      URL of the Git repository hosting the agent package.
-                    Default value: ${RUST_AGENT_PKG}
-
 USE_DOCKER          If set, build the rootfs inside a container (requires
                     Docker).
                     Default value: <not set>
@@ -291,17 +279,11 @@ compare_versions()
 
 check_env_variables()
 {
-	# Fetch the first element from GOPATH as working directory
-	# as go get only works against the first item in the GOPATH
-	[ -z "$GOPATH" ] && die "GOPATH not set"
+	# this will be mounted to container for using yq on the host side.
 	GOPATH_LOCAL="${GOPATH%%:*}"
 
 	[ "$AGENT_INIT" == "yes" -o "$AGENT_INIT" == "no" ] || die "AGENT_INIT($AGENT_INIT) is invalid (must be yes or no)"
 
-	if [ -z "${AGENT_SOURCE_BIN}" ]; then
-		[ "$RUST_AGENT" == "yes" -o "$RUST_AGENT" == "no" ] || die "RUST_AGENT($RUST_AGENT) is invalid (must be yes or no)"
-	fi
-
 	[ -n "${KERNEL_MODULES_DIR}" ] && [ ! -d "${KERNEL_MODULES_DIR}" ] && die "KERNEL_MODULES_DIR defined but is not an existing directory"
 
 	[ -n "${OSBUILDER_VERSION}" ] || die "need osbuilder version"
@@ -346,24 +328,18 @@ build_rootfs_distro()
 
 	mkdir -p ${ROOTFS_DIR}
 
-	detect_go_version ||
-		die "Could not detect the required Go version for AGENT_VERSION='${AGENT_VERSION:-master}'."
-
-	echo "Required Go version: $GO_VERSION"
-
 	# need to detect rustc's version too?
 	detect_rust_version ||
-		die "Could not detect the required rust version for AGENT_VERSION='${AGENT_VERSION:-master}'."
+		die "Could not detect the required rust version for AGENT_VERSION='${AGENT_VERSION:-main}'."
 
 	echo "Required rust version: $RUST_VERSION"
 
 	detect_musl_version ||
-		die "Could not detect the required musl version for AGENT_VERSION='${AGENT_VERSION:-master}'."
+		die "Could not detect the required musl version for AGENT_VERSION='${AGENT_VERSION:-main}'."
 
 	echo "Required musl version: $MUSL_VERSION"
 
 	if [ -z "${USE_DOCKER}" ] && [ -z "${USE_PODMAN}" ]; then
-		#Generate an error if the local Go version is too old
 		info "build directly"
 		build_rootfs ${ROOTFS_DIR}
 	else
@@ -380,7 +356,7 @@ build_rootfs_distro()
 			REGISTRY_ARG="--build-arg IMAGE_REGISTRY=${IMAGE_REGISTRY}"
 		fi
 
-		# setup to install go or rust here
+		# setup to install rust here
 		generate_dockerfile "${distro_config_dir}"
 		"$container_engine" build  \
 			${REGISTRY_ARG} \
@@ -396,12 +372,7 @@ build_rootfs_distro()
 		docker_run_args+=" --runtime ${DOCKER_RUNTIME}"
 
 		if [ -z "${AGENT_SOURCE_BIN}" ] ; then
-			if [ "$RUST_AGENT" == "no" ]; then
-				docker_run_args+=" --env GO_AGENT_PKG=${GO_AGENT_PKG}"
-			else
-				docker_run_args+=" --env RUST_AGENT_PKG=${RUST_AGENT_PKG}"
-			fi
-			docker_run_args+=" --env RUST_AGENT=${RUST_AGENT} -v ${GOPATH_LOCAL}:${GOPATH_LOCAL} --env GOPATH=${GOPATH_LOCAL}"
+			docker_run_args+=" -v ${GOPATH_LOCAL}:${GOPATH_LOCAL} --env GOPATH=${GOPATH_LOCAL}"
 		else
 			docker_run_args+=" --env AGENT_SOURCE_BIN=${AGENT_SOURCE_BIN}"
 			docker_run_args+=" -v ${AGENT_SOURCE_BIN}:${AGENT_SOURCE_BIN}"
@@ -576,7 +547,6 @@ EOT
 		test -r "${HOME}/.cargo/env" && source "${HOME}/.cargo/env"
 		[ "$ARCH" == "aarch64" ] && OLD_PATH=$PATH && export PATH=$PATH:/usr/local/musl/bin
 
-		agent_pkg="${RUST_AGENT_PKG}"
 		agent_dir="${script_dir}/../../../src/agent/"
 		# For now, rust-agent doesn't support seccomp yet.
 		SECCOMP="no"

tools/osbuilder/rootfs-builder/suse/Dockerfile.in

@@ -15,7 +15,6 @@ COPY install-packages.sh config.sh /
 # RUN commands
 RUN chmod +x /install-packages.sh; /install-packages.sh
 
-# This will install the proper golang to build Kata components
+# This will install the proper packages to build Kata components
 @INSTALL_MUSL@
-@INSTALL_GO@
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/template/Dockerfile.template

@@ -13,5 +13,6 @@ FROM ${IMAGE_REGISTRY}/@distro@:@OS_VERSION@
 
 # RUN commands
 
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
+# This will install the proper packages to build Kata components
+@INSTALL_MUSL@
+@INSTALL_RUST@

tools/osbuilder/rootfs-builder/ubuntu/Dockerfile-aarch64.in

@@ -33,7 +33,6 @@ RUN apt-get update && apt-get install -y \
     systemd \
     tar \
     vim
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
+# This will install the proper packages to build Kata components
 @INSTALL_MUSL@
 @INSTALL_RUST@

tools/osbuilder/rootfs-builder/ubuntu/Dockerfile.in

@@ -40,6 +40,6 @@ RUN apt-get update && apt-get --no-install-recommends install -y \
     tar \
     vim \
     wget
-# This will install the proper golang to build Kata components
-@INSTALL_GO@
+
+# This will install the proper packages to build Kata components
 @INSTALL_RUST@

tools/osbuilder/scripts/lib.sh

@@ -150,6 +150,8 @@ build_rootfs()
 	else
 		DNF="${DNF} --releasever=${OS_VERSION}"
 	fi
+
+	info "install packages for rootfs"
 	$DNF install ${EXTRA_PKGS} ${PACKAGES}
 }
 
@@ -190,14 +192,8 @@ create_summary_file()
 	local agent="${AGENT_DEST}"
 	[ "$AGENT_INIT" = yes ] && agent="${init}"
 
-	local agent_version
-	if [ "${RUST_AGENT}" == "no" ]; then
-		agent_version=$("$agent" --version|awk '{print $NF}')
-	else
-		local -r agentdir="${script_dir}/../../../"
-		agent_version=$(cat ${agentdir}/VERSION)
-	fi
-
+	local -r agentdir="${script_dir}/../../../"
+	local -r agent_version=$(cat ${agentdir}/VERSION)
 
 	cat >"$file"<<-EOT
 	---
@@ -241,37 +237,20 @@ generate_dockerfile()
 	local libc=musl
 	case "$(uname -m)" in
 		"ppc64le")
-			goarch=ppc64le
 			rustarch=powerpc64le
 			muslarch=powerpc64
 			libc=gnu
 			;;
-
-		"aarch64")
-			goarch=arm64
-			;;
 		"s390x")
-			goarch=s390x
 			libc=gnu
 			;;
 
 		*)
-			goarch=amd64
 			;;
 	esac
 
 	[ -n "${http_proxy:-}" ] && readonly set_proxy="RUN sed -i '$ a proxy="${http_proxy:-}"' /etc/dnf/dnf.conf /etc/yum.conf; true"
 
-	curlOptions=("-OL")
-	[ -n "${http_proxy:-}" ] && curlOptions+=("-x ${http_proxy:-}")
-
-	readonly install_go="
-RUN cd /tmp ; curl ${curlOptions[@]} https://storage.googleapis.com/golang/go${GO_VERSION}.linux-${goarch}.tar.gz
-RUN tar -C /usr/ -xzf /tmp/go${GO_VERSION}.linux-${goarch}.tar.gz
-ENV GOROOT=/usr/go
-ENV PATH=\$PATH:\$GOROOT/bin:\$GOPATH/bin
-"
-
 	# Rust agent
 	# rust installer should set path apropiately, just in case
 	# install musl for compiling rust-agent
@@ -327,8 +306,6 @@ RUN . /root/.cargo/env; \
 	rustup target install ${rustarch}-unknown-linux-${libc}
 RUN ln -sf /usr/bin/g++ /bin/musl-g++
 "
-	# rust agent still need go to build
-	# because grpc-sys need go to build
 	pushd "${dir}"
 	dockerfile_template="Dockerfile.in"
 	dockerfile_arch_template="Dockerfile-${architecture}.in"
@@ -342,40 +319,22 @@ RUN ln -sf /usr/bin/g++ /bin/musl-g++
 	# ppc64le and s390x have no musl target
 	if [ "${architecture}" == "ppc64le" ] || [ "${architecture}" == "s390x" ]; then
 		sed \
-			-e "s|@GO_VERSION@|${GO_VERSION}|g" \
 			-e "s|@OS_VERSION@|${OS_VERSION:-}|g" \
 			-e "s|@INSTALL_MUSL@||g" \
-			-e "s|@INSTALL_GO@|${install_go//$'\n'/\\n}|g" \
 			-e "s|@INSTALL_RUST@|${install_rust//$'\n'/\\n}|g" \
 			-e "s|@SET_PROXY@|${set_proxy:-}|g" \
 			"${dockerfile_template}" > Dockerfile
 	else
 		sed \
-			-e "s|@GO_VERSION@|${GO_VERSION}|g" \
 			-e "s|@OS_VERSION@|${OS_VERSION:-}|g" \
 			-e "s|@INSTALL_MUSL@|${install_musl//$'\n'/\\n}|g" \
-			-e "s|@INSTALL_GO@|${install_go//$'\n'/\\n}|g" \
 			-e "s|@INSTALL_RUST@|${install_rust//$'\n'/\\n}|g" \
 			-e "s|@SET_PROXY@|${set_proxy:-}|g" \
 			"${dockerfile_template}" > Dockerfile
 	fi
 	popd
 }
 
-detect_go_version()
-{
-	info "Detecting go version"
-	typeset yq=$(command -v yq || command -v ${GOPATH}/bin/yq || echo "${GOPATH}/bin/yq")
-	if [ ! -f "$yq" ]; then
-		source "$yq_file"
-	fi
-
-	info "Get Go version from ${kata_versions_file}"
-	GO_VERSION="$(cat "${kata_versions_file}"  | $yq r -X - "languages.golang.meta.newest-version")"
-
-	[ "$?" == "0" ] && [ "$GO_VERSION" != "null" ]
-}
-
 detect_rust_version()
 {
 	info "Detecting agent rust version"
@@ -385,7 +344,7 @@ detect_rust_version()
 	fi
 
 	info "Get rust version from ${kata_versions_file}"
-	RUST_VERSION="$(cat "${kata_versions_file}"  | $yq r -X - "languages.rust.meta.newest-version")"
+	RUST_VERSION="$(cat "${kata_versions_file}" | $yq r -X - "languages.rust.meta.newest-version")"
 
 	[ "$?" == "0" ] && [ "$RUST_VERSION" != "null" ]
 }