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karmada/hack/util.sh

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#!/usr/bin/env bash
set -o errexit
set -o nounset
set -o pipefail
# This script holds common bash variables and utility functions.
KARMADA_SYSTEM_NAMESPACE="karmada-system"
ETCD_POD_LABEL="etcd"
APISERVER_POD_LABEL="karmada-apiserver"
KUBE_CONTROLLER_POD_LABEL="kube-controller-manager"
KARMADA_AGGREGATION_APISERVER_LABEL="karmada-aggregated-apiserver"
KARMADA_CONTROLLER_LABEL="karmada-controller-manager"
KARMADA_SCHEDULER_LABEL="karmada-scheduler"
KARMADA_WEBHOOK_LABEL="karmada-webhook"
AGENT_POD_LABEL="karmada-agent"
INTERPRETER_WEBHOOK_EXAMPLE_LABEL="karmada-interpreter-webhook-example"
KARMADA_GO_PACKAGE="github.com/karmada-io/karmada"
MIN_Go_VERSION=go1.17.0
KARMADA_TARGET_SOURCE=(
karmada-aggregated-apiserver=cmd/aggregated-apiserver
karmada-controller-manager=cmd/controller-manager
karmada-scheduler=cmd/scheduler
karmada-descheduler=cmd/descheduler
karmadactl=cmd/karmadactl
kubectl-karmada=cmd/kubectl-karmada
karmada-webhook=cmd/webhook
karmada-agent=cmd/agent
karmada-scheduler-estimator=cmd/scheduler-estimator
karmada-interpreter-webhook-example=examples/customresourceinterpreter/webhook
)
#https://textkool.com/en/ascii-art-generator?hl=default&vl=default&font=DOS%20Rebel&text=KARMADA
KARMADA_GREETING='
------------------------------------------------------------------------------------------------------
█████ ████ █████████ ███████████ ██████ ██████ █████████ ██████████ █████████
░░███ ███░ ███░░░░░███ ░░███░░░░░███ ░░██████ ██████ ███░░░░░███ ░░███░░░░███ ███░░░░░███
░███ ███ ░███ ░███ ░███ ░███ ░███░█████░███ ░███ ░███ ░███ ░░███ ░███ ░███
░███████ ░███████████ ░██████████ ░███░░███ ░███ ░███████████ ░███ ░███ ░███████████
░███░░███ ░███░░░░░███ ░███░░░░░███ ░███ ░░░ ░███ ░███░░░░░███ ░███ ░███ ░███░░░░░███
░███ ░░███ ░███ ░███ ░███ ░███ ░███ ░███ ░███ ░███ ░███ ███ ░███ ░███
█████ ░░████ █████ █████ █████ █████ █████ █████ █████ █████ ██████████ █████ █████
░░░░░ ░░░░ ░░░░░ ░░░░░ ░░░░░ ░░░░░ ░░░░░ ░░░░░ ░░░░░ ░░░░░ ░░░░░░░░░░ ░░░░░ ░░░░░
------------------------------------------------------------------------------------------------------
'
function util::get_target_source() {
local target=$1
for s in "${KARMADA_TARGET_SOURCE[@]}"; do
if [[ "$s" == ${target}=* ]]; then
echo "${s##${target}=}"
return
fi
done
}
# This function installs a Go tools by 'go install' command.
# Parameters:
# - $1: package name, such as "sigs.k8s.io/controller-tools/cmd/controller-gen"
# - $2: package version, such as "v0.4.1"
function util::install_tools() {
local package="$1"
local version="$2"
echo "go install ${package}@${version}"
GO111MODULE=on go install "${package}"@"${version}"
GOPATH=$(go env GOPATH | awk -F ':' '{print $1}')
export PATH=$PATH:$GOPATH/bin
}
function util::cmd_exist {
local CMD=$(command -v ${1})
if [[ ! -x ${CMD} ]]; then
return 1
fi
return 0
}
# util::cmd_must_exist check whether command is installed.
function util::cmd_must_exist {
local CMD=$(command -v ${1})
if [[ ! -x ${CMD} ]]; then
echo "Please install ${1} and verify they are in \$PATH."
exit 1
fi
}
function util::verify_go_version {
local go_version
IFS=" " read -ra go_version <<< "$(GOFLAGS='' go version)"
if [[ "${MIN_Go_VERSION}" != $(echo -e "${MIN_Go_VERSION}\n${go_version[2]}" | sort -s -t. -k 1,1 -k 2,2n -k 3,3n | head -n1) && "${go_version[2]}" != "devel" ]]; then
echo "Detected go version: ${go_version[*]}."
echo "Karmada requires ${MIN_Go_VERSION} or greater."
echo "Please install ${MIN_Go_VERSION} or later."
exit 1
fi
}
# util::cmd_must_exist_cfssl downloads cfssl/cfssljson if they do not already exist in PATH
function util::cmd_must_exist_cfssl {
CFSSL_VERSION=${1}
if command -v cfssl &>/dev/null && command -v cfssljson &>/dev/null; then
CFSSL_BIN=$(command -v cfssl)
CFSSLJSON_BIN=$(command -v cfssljson)
return 0
fi
util::install_tools "github.com/cloudflare/cfssl/cmd/..." ${CFSSL_VERSION}
GOPATH=$(go env GOPATH | awk -F ':' '{print $1}')
CFSSL_BIN="${GOPATH}/bin/cfssl"
CFSSLJSON_BIN="${GOPATH}/bin/cfssljson"
if [[ ! -x ${CFSSL_BIN} || ! -x ${CFSSLJSON_BIN} ]]; then
echo "Failed to download 'cfssl'. Please install cfssl and cfssljson and verify they are in \$PATH."
echo "Hint: export PATH=\$PATH:\$GOPATH/bin; go install github.com/cloudflare/cfssl/cmd/..."
exit 1
fi
}
# util::install_environment_check will check OS and ARCH before installing
# ARCH support list: amd64,arm64
# OS support list: linux,darwin
function util::install_environment_check {
local ARCH=${1:-}
local OS=${2:-}
if [[ "$ARCH" =~ ^(amd64|arm64)$ ]]; then
if [[ "$OS" =~ ^(linux|darwin)$ ]]; then
return 0
fi
fi
echo "Sorry, Karmada installation does not support $ARCH/$OS at the moment"
exit 1
}
# util::install_kubectl will install the given version kubectl
function util::install_kubectl {
local KUBECTL_VERSION=${1}
local ARCH=${2}
local OS=${3:-linux}
if [ -z "$KUBECTL_VERSION" ]; then
KUBECTL_VERSION=$(curl -L -s https://dl.k8s.io/release/stable.txt)
fi
echo "Installing 'kubectl ${KUBECTL_VERSION}' for you"
curl --retry 5 -sSLo ./kubectl -w "%{http_code}" https://dl.k8s.io/release/"$KUBECTL_VERSION"/bin/"$OS"/"$ARCH"/kubectl | grep '200' > /dev/null
ret=$?
if [ ${ret} -eq 0 ]; then
chmod +x ./kubectl
mkdir -p ~/.local/bin/
mv ./kubectl ~/.local/bin/kubectl
export PATH=$PATH:~/.local/bin
else
echo "Failed to install kubectl, can not download the binary file at https://dl.k8s.io/release/$KUBECTL_VERSION/bin/$OS/$ARCH/kubectl"
exit 1
fi
}
# util::create_signing_certkey creates a CA, args are sudo, dest-dir, ca-id, purpose
function util::create_signing_certkey {
local sudo=$1
local dest_dir=$2
local id=$3
local purpose=$4
OPENSSL_BIN=$(command -v openssl)
# Create ca
${sudo} /usr/bin/env bash -e <<EOF
rm -f "${dest_dir}/${id}-ca.crt" "${dest_dir}/${id}-ca.key"
${OPENSSL_BIN} req -x509 -sha256 -new -nodes -days 365 -newkey rsa:2048 -keyout "${dest_dir}/${id}-ca.key" -out "${dest_dir}/${id}-ca.crt" -subj "/C=xx/ST=x/L=x/O=x/OU=x/CN=ca/emailAddress=x/"
echo '{"signing":{"default":{"expiry":"43800h","usages":["signing","key encipherment",${purpose}]}}}' > "${dest_dir}/${id}-ca-config.json"
EOF
}
# util::create_certkey signs a certificate: args are sudo, dest-dir, ca, filename (roughly), subject, hosts...
function util::create_certkey {
local sudo=$1
local dest_dir=$2
local ca=$3
local id=$4
local cn=${5:-$4}
local hosts=""
local SEP=""
shift 5
while [[ -n "${1:-}" ]]; do
hosts+="${SEP}\"$1\""
SEP=","
shift 1
done
${sudo} /usr/bin/env bash -e <<EOF
cd ${dest_dir}
echo '{"CN":"${cn}","hosts":[${hosts}],"names":[{"O":"system:masters"}],"key":{"algo":"rsa","size":2048}}' | ${CFSSL_BIN} gencert -ca=${ca}.crt -ca-key=${ca}.key -config=${ca}-config.json - | ${CFSSLJSON_BIN} -bare ${id}
mv "${id}-key.pem" "${id}.key"
mv "${id}.pem" "${id}.crt"
rm -f "${id}.csr"
EOF
}
# util::append_client_kubeconfig creates a new context including a cluster and a user to the existed kubeconfig file
function util::append_client_kubeconfig {
local kubeconfig_path=$1
local client_certificate_file=$2
local client_key_file=$3
local api_host=$4
local api_port=$5
local client_id=$6
local token=${7:-}
kubectl config set-cluster "${client_id}" --server=https://"${api_host}:${api_port}" --insecure-skip-tls-verify=true --kubeconfig="${kubeconfig_path}"
kubectl config set-credentials "${client_id}" --token="${token}" --client-certificate="${client_certificate_file}" --client-key="${client_key_file}" --embed-certs=true --kubeconfig="${kubeconfig_path}"
kubectl config set-context "${client_id}" --cluster="${client_id}" --user="${client_id}" --kubeconfig="${kubeconfig_path}"
}
# util::write_client_kubeconfig creates a self-contained kubeconfig: args are sudo, dest-dir, client certificate data, client key data, host, port, client id, token(optional)
function util::write_client_kubeconfig {
local sudo=$1
local dest_dir=$2
local client_certificate_data=$3
local client_key_data=$4
local api_host=$5
local api_port=$6
local client_id=$7
local token=${8:-}
cat <<EOF | ${sudo} tee "${dest_dir}"/"${client_id}".config > /dev/null
apiVersion: v1
kind: Config
clusters:
- cluster:
"insecure-skip-tls-verify": true
server: https://${api_host}:${api_port}/
name: karmada-apiserver
users:
- user:
token: ${token}
client-certificate-data: ${client_certificate_data}
client-key-data: ${client_key_data}
name: karmada-apiserver
contexts:
- context:
cluster: karmada-apiserver
user: karmada-apiserver
name: karmada-apiserver
current-context: karmada-apiserver
EOF
${sudo} chmod 0644 "${dest_dir}"/"${client_id}".config
}
# util::wait_for_condition blocks until the provided condition becomes true
# Arguments:
# - 1: message indicating what conditions is being waited for (e.g. 'ok')
# - 2: a string representing an eval'able condition. When eval'd it should not output
# anything to stdout or stderr.
# - 3: optional timeout in seconds. If not provided, waits forever.
# Returns:
# 1 if the condition is not met before the timeout
function util::wait_for_condition() {
local msg=$1
# condition should be a string that can be eval'd.
local condition=$2
local timeout=${3:-}
local start_msg="Waiting for ${msg}"
local error_msg="[ERROR] Timeout waiting for condition ${msg}"
local counter=0
while ! eval ${condition}; do
if [[ "${counter}" = "0" ]]; then
echo -n "${start_msg}"
fi
if [[ -z "${timeout}" || "${counter}" -lt "${timeout}" ]]; then
counter=$((counter + 1))
if [[ -n "${timeout}" ]]; then
echo -n '.'
fi
sleep 1
else
echo -e "\n${error_msg}"
return 1
fi
done
if [[ "${counter}" != "0" && -n "${timeout}" ]]; then
echo ' done'
fi
}
# util::wait_file_exist checks if a file exists, if not, wait until timeout
function util::wait_file_exist() {
local file_path=${1}
local timeout=${2}
local error_msg="[ERROR] Timeout waiting for file exist ${file_path}"
for ((time=0; time<${timeout}; time++)); do
if [[ -e ${file_path} ]]; then
return 0
fi
sleep 1
done
echo -e "\n${error_msg}"
return 1
}
# util::wait_pod_ready waits for pod state becomes ready until timeout.
# Parmeters:
# - $1: pod label, such as "app=etcd"
# - $2: pod namespace, such as "karmada-system"
# - $3: time out, such as "200s"
function util::wait_pod_ready() {
local pod_label=$1
local pod_namespace=$2
echo "wait the $pod_label ready..."
set +e
util::kubectl_with_retry wait --for=condition=Ready --timeout=30s pods -l app=${pod_label} -n ${pod_namespace}
ret=$?
set -e
if [ $ret -ne 0 ];then
echo "kubectl describe info:"
kubectl describe pod -l app=${pod_label} -n ${pod_namespace}
echo "kubectl logs info:"
kubectl logs -l app=${pod_label} -n ${pod_namespace}
fi
return ${ret}
}
# util::wait_apiservice_ready waits for apiservice state becomes Available until timeout.
# Parmeters:
# - $1: apiservice label, such as "app=etcd"
# - $3: time out, such as "200s"
function util::wait_apiservice_ready() {
local apiservice_label=$1
echo "wait the $apiservice_label Available..."
set +e
util::kubectl_with_retry wait --for=condition=Available --timeout=30s apiservices -l app=${apiservice_label}
ret=$?
set -e
if [ $ret -ne 0 ];then
echo "kubectl describe info:"
kubectl describe apiservices -l app=${apiservice_label}
fi
return ${ret}
}
# util::kubectl_with_retry will retry if execute kubectl command failed
# tolerate kubectl command failure that may happen before the pod is created by StatefulSet/Deployment.
function util::kubectl_with_retry() {
local ret=0
for i in {1..10}; do
kubectl "$@"
ret=$?
if [[ ${ret} -ne 0 ]]; then
echo "kubectl $@ failed, retrying(${i} times)"
sleep 1
continue
else
return 0
fi
done
echo "kubectl $@ failed"
kubectl "$@"
return ${ret}
}
# util::create_cluster creates a kubernetes cluster
# util::create_cluster creates a kind cluster and don't wait for control plane node to be ready.
# Parmeters:
# - $1: cluster name, such as "host"
# - $2: KUBECONFIG file, such as "/var/run/host.config"
# - $3: node docker image to use for booting the cluster, such as "kindest/node:v1.19.1"
# - $4: log file path, such as "/tmp/logs/"
function util::create_cluster() {
local cluster_name=${1}
local kubeconfig=${2}
local kind_image=${3}
local log_path=${4}
local cluster_config=${5:-}
mkdir -p ${log_path}
rm -rf "${log_path}/${cluster_name}.log"
rm -f "${kubeconfig}"
nohup kind delete cluster --name="${cluster_name}" >> "${log_path}"/"${cluster_name}".log 2>&1 && kind create cluster --name "${cluster_name}" --kubeconfig="${kubeconfig}" --image="${kind_image}" --config="${cluster_config}" >> "${log_path}"/"${cluster_name}".log 2>&1 &
echo "Creating cluster ${cluster_name} and the log file is in ${log_path}/${cluster_name}.log"
}
# This function returns the IP address of a docker instance
# Parameters:
# - $1: docker instance name
function util::get_docker_native_ipaddress(){
local container_name=$1
docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "${container_name}"
}
# This function returns the IP address and port of a specific docker instance's host IP
# Parameters:
# - $1: docker instance name
# Note:
# Use for getting host IP and port for cluster
# "6443/tcp" assumes that API server port is 6443 and protocol is TCP
function util::get_docker_host_ip_port(){
local container_name=$1
docker inspect --format='{{range $key, $value := index .NetworkSettings.Ports "6443/tcp"}}{{if eq $key 0}}{{$value.HostIp}}:{{$value.HostPort}}{{end}}{{end}}' "${container_name}"
}
# util::check_clusters_ready checks if a cluster is ready, if not, wait until timeout
function util::check_clusters_ready() {
local kubeconfig_path=${1}
local context_name=${2}
echo "Waiting for kubeconfig file ${kubeconfig_path} and clusters ${context_name} to be ready..."
util::wait_file_exist "${kubeconfig_path}" 300
util::wait_for_condition 'running' "docker inspect --format='{{.State.Status}}' ${context_name}-control-plane &> /dev/null" 300
kubectl config rename-context "kind-${context_name}" "${context_name}" --kubeconfig="${kubeconfig_path}"
local os_name
os_name=$(go env GOOS)
local container_ip_port
case $os_name in
linux) container_ip_port=$(util::get_docker_native_ipaddress "${context_name}-control-plane")":6443"
;;
darwin) container_ip_port=$(util::get_docker_host_ip_port "${context_name}-control-plane")
;;
*)
echo "OS ${os_name} does NOT support for getting container ip in installation script"
exit 1
esac
kubectl config set-cluster "kind-${context_name}" --server="https://${container_ip_port}" --kubeconfig="${kubeconfig_path}"
util::wait_for_condition 'ok' "kubectl --kubeconfig ${kubeconfig_path} --context ${context_name} get --raw=/healthz &> /dev/null" 300
}
# This function gets api server's ip from kubeconfig by context name
function util::get_apiserver_ip_from_kubeconfig(){
local context_name=$1
local cluster_name apiserver_url
cluster_name=$(kubectl config view --template='{{ range $_, $value := .contexts }}{{if eq $value.name '"\"${context_name}\""'}}{{$value.context.cluster}}{{end}}{{end}}')
apiserver_url=$(kubectl config view --template='{{range $_, $value := .clusters }}{{if eq $value.name '"\"${cluster_name}\""'}}{{$value.cluster.server}}{{end}}{{end}}')
echo "${apiserver_url}" | awk -F/ '{print $3}' | sed 's/:.*//'
}
# This function deploys webhook configuration
# Parameters:
# - $1: CA file
# - $2: configuration file
# Note:
# Deprecated: should be removed after helm get on board.
function util::deploy_webhook_configuration() {
local ca_file=$1
local conf=$2
local ca_string=$(cat ${ca_file} | base64 | tr "\n" " "|sed s/[[:space:]]//g)
local temp_path=$(mktemp -d)
cp -rf "${conf}" "${temp_path}/temp.yaml"
sed -i'' -e "s/{{caBundle}}/${ca_string}/g" "${temp_path}/temp.yaml"
kubectl apply -f "${temp_path}/temp.yaml"
rm -rf "${temp_path}"
}
function util::fill_cabundle() {
local ca_file=$1
local conf=$2
local ca_string=$(sudo cat ${ca_file} | base64 | tr "\n" " "|sed s/[[:space:]]//g)
sed -i'' -e "s/{{caBundle}}/${ca_string}/g" "${conf}"
}
# util::wait_service_external_ip give a service external ip when it is ready, if not, wait until timeout
# Parameters:
# - $1: service name in k8s
# - $2: namespace
SERVICE_EXTERNAL_IP=''
function util::wait_service_external_ip() {
local service_name=$1
local namespace=$2
local external_ip
local tmp
for tmp in {1..30}; do
set +e
external_host=$(kubectl get service "${service_name}" -n "${namespace}" --template="{{range .status.loadBalancer.ingress}}{{.hostname}} {{end}}" | xargs)
external_ip=$(kubectl get service "${service_name}" -n "${namespace}" --template="{{range .status.loadBalancer.ingress}}{{.ip}} {{end}}" | xargs)
set -e
if [[ ! -z "$external_host" ]]; then # Compatibility with hostname, such as AWS
external_ip=$external_host
fi
if [[ -z "$external_ip" ]]; then
echo "wait the external ip of ${service_name} ready..."
sleep 6
continue
else
SERVICE_EXTERNAL_IP="${external_ip}"
return 0
fi
done
return 1
}
# util::get_load_balancer_ip get a valid load balancer ip from k8s service's 'loadBalancer' , if not, wait until timeout
# call 'util::wait_service_external_ip' before using this function
function util::get_load_balancer_ip() {
local tmp
local first_ip
if [[ -n "${SERVICE_EXTERNAL_IP}" ]]; then
first_ip=$(echo "${SERVICE_EXTERNAL_IP}" | awk '{print $1}') #temporarily choose the first one
for tmp in {1..10}; do
#if it is a host, check dns first
if [[ ! "${first_ip}" =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
if ! nslookup ${first_ip} > /dev/null; then # host dns lookup failed
sleep 30
continue
fi
fi
set +e
connect_test=$(curl -s -k -m 5 https://"${first_ip}":5443/readyz)
set -e
if [[ "${connect_test}" = "ok" ]]; then
echo "${first_ip}"
return 0
else
sleep 3
continue
fi
done
fi
return 1
}
# util::add_routes will add routes for given kind cluster
# Parameters:
# - $1: name of the kind cluster want to add routes
# - $2: the kubeconfig path of the cluster wanted to be connected
# - $3: the context in kubeconfig of the cluster wanted to be connected
function util::add_routes() {
unset IFS
routes=$(kubectl --kubeconfig ${2} --context ${3} get nodes -o jsonpath='{range .items[*]}ip route add {.spec.podCIDR} via {.status.addresses[?(.type=="InternalIP")].address}{"\n"}{end}')
echo "Connecting cluster ${1} to ${2}"
IFS=$'\n'
for n in $(kind get nodes --name "${1}"); do
for r in $routes; do
echo "exec cmd in docker $n $r"
eval "docker exec $n $r"
done
done
unset IFS
}
# util::get_macos_ipaddress will get ip address on macos interactively, store to 'MAC_NIC_IPADDRESS' if available
MAC_NIC_IPADDRESS=''
function util::get_macos_ipaddress() {
if [[ $(go env GOOS) = "darwin" ]]; then
tmp_ip=$(ipconfig getifaddr en0 || true)
echo ""
echo " Detected that you are installing Karmada on macOS "
echo ""
echo "It needs a Macintosh IP address to bind Karmada API Server(port 5443),"
echo "so that member clusters can access it from docker containers, please"
echo -n "input an available IP, "
if [[ -z ${tmp_ip} ]]; then
echo "you can use the command 'ifconfig' to look for one"
tips_msg="[Enter IP address]:"
else
echo "default IP will be en0 inet addr if exists"
tips_msg="[Enter for default ${tmp_ip}]:"
fi
read -r -p "${tips_msg}" MAC_NIC_IPADDRESS
MAC_NIC_IPADDRESS=${MAC_NIC_IPADDRESS:-$tmp_ip}
if [[ "${MAC_NIC_IPADDRESS}" =~ ^(([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))\.){3}([1-9]?[0-9]|1[0-9][0-9]|2([0-4][0-9]|5[0-5]))$ ]]; then
echo "Using IP address: ${MAC_NIC_IPADDRESS}"
else
echo -e "\nError: you input an invalid IP address"
exit 1
fi
else # non-macOS
MAC_NIC_IPADDRESS=${MAC_NIC_IPADDRESS:-}
fi
}
function util::get_GO_LDFLAGS() {
# Git information
GIT_VERSION=$(git describe --tags --dirty)
GIT_COMMIT_HASH=$(git rev-parse HEAD)
GIT_TREESTATE="clean"
GIT_DIFF=$(git diff --quiet >/dev/null 2>&1; if [[ $$ = 1 ]]; then echo "1"; fi)
if [[ "${GIT_DIFF}" == "1" ]];then
GIT_TREESTATE="dirty"
fi
BUILDDATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')
LDFLAGS="-X github.com/karmada-io/karmada/pkg/version.gitVersion=${GIT_VERSION} \
-X github.com/karmada-io/karmada/pkg/version.gitCommit=${GIT_COMMIT_HASH} \
-X github.com/karmada-io/karmada/pkg/version.gitTreeState=${GIT_TREESTATE} \
-X github.com/karmada-io/karmada/pkg/version.buildDate=${BUILDDATE}"
echo $LDFLAGS
}
# util::create_gopath_tree create the GOPATH tree
# Parameters:
# - $1: the root path of repo
# - $2: go path
function util:create_gopath_tree() {
local repo_root=$1
local go_path=$2
local go_pkg_dir="${go_path}/src/${KARMADA_GO_PACKAGE}"
go_pkg_dir=$(dirname "${go_pkg_dir}")
mkdir -p "${go_pkg_dir}"
if [[ ! -e "${go_pkg_dir}" || "$(readlink "${go_pkg_dir}")" != "${repo_root}" ]]; then
ln -snf "${repo_root}" "${go_pkg_dir}"
fi
}
function util:host_platform() {
echo "$(go env GOHOSTOS)/$(go env GOHOSTARCH)"
}
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