#!/usr/bin/env sh

set -eu

# Builds CLI binary for current platform only and outside docker to speed up things. Suitable for local development.
# Note: This script is used by Brew when running `brew install linkerd`:
# https://github.com/Homebrew/homebrew-core/pull/36957

bindir=$( cd "${0%/*}" && pwd )
rootdir=$( cd "$bindir"/.. && pwd )
# shellcheck source=_tag.sh
. "$bindir"/_tag.sh

arch=""
case $(uname) in
	Darwin)
		host_platform=darwin
		;;
	Linux)
		host_platform=linux
		arch=$(uname -m)
		case $arch in
			x86_64)
				arch=amd64
				;;
			armv8*)
				arch=arm64
				;;
			aarch64*)
				arch=arm64
				;;
			armv*)
				arch=arm
				;;
			amd64|arm64)
				arch=$arch
				;;
			*)
				echo "unsupported architecture: $arch" >&2
				exit 1
				;;
		esac
		;;
	*)
		host_platform=windows
		;;
esac

(
    cd "$rootdir"
    cd "$(pwd -P)"
    target=target/cli/$host_platform/linkerd
    if [ -n "$arch" ]; then
      target=target/cli/$host_platform-$arch/linkerd
    fi
    GO111MODULE=on go generate -mod=readonly ./pkg/charts/static # TODO: `go generate` does not honor -mod=readonly
    root_tag=$("$bindir"/root-tag)
    GO111MODULE=on CGO_ENABLED=0 go build -o $target -tags prod -mod=readonly -ldflags "-s -w -X github.com/linkerd/linkerd2/pkg/version.Version=$root_tag" ./cli
    echo "$target"
)