#!/bin/sh
set -eu

repo=$(CDPATH= cd -- "$(dirname "$0")/.." && pwd)
out=${1:-"$repo/dist"}
: "${VERSION:?set VERSION to the release version, for example v1.0.0}"

case $VERSION in
  *[!A-Za-z0-9._+-]*|'')
    echo "VERSION contains unsupported characters: $VERSION" >&2
    exit 2
    ;;
esac

mkdir -p "$out"
out=$(CDPATH= cd -- "$out" && pwd)
rm -f "$out/proxyctl-linux-amd64" "$out/proxyctl-linux-arm64" "$out/SHA256SUMS"

build() {
  arch=$1
  output="$out/proxyctl-linux-$arch"
  (
    cd "$repo"
    GOENV=off GOFLAGS= CGO_ENABLED=0 GOOS=linux GOARCH="$arch" \
      go build -mod=readonly -buildvcs=false -trimpath \
      -ldflags="-s -w -X main.version=$VERSION" \
      -o "$output" ./cmd/proxyctl
  )
}

umask 022
build amd64
build arm64
(
  cd "$out"
  sha256sum proxyctl-linux-amd64 proxyctl-linux-arm64 > SHA256SUMS
)

printf 'built Linux amd64 and arm64 binaries in %s\n' "$out"