#!/usr/bin/env sh
# Build the linux lchat binary for the router box, stamped with a build id
# (the git short sha, or $1) so `lchat stage`/`deploy --version` can identify and
# health-check it. Prints the build id and the output path.
#
#   ./deploy/build-linux.sh                # linux/amd64, id = git short sha
#   ./deploy/build-linux.sh test-scroll    # id = test-scroll (e.g. a canary label)
#   ARCH=arm64 ./deploy/build-linux.sh     # linux/arm64 (self-hosters on ARM)
#   OS=darwin ARCH=arm64 ./deploy/build-linux.sh  # macOS (the `lchat try` download)
#   OUT=/tmp/lchat ./deploy/build-linux.sh
set -eu

VER="${1:-$(git rev-parse --short HEAD)}"
if [ -z "$VER" ]; then
  echo "build-linux: could not determine a build id (pass one as \$1)" >&2
  exit 1
fi
OS="${OS:-linux}"
ARCH="${ARCH:-amd64}"
OUT="${OUT:-lchat-$OS-$ARCH}"

GOOS="$OS" GOARCH="$ARCH" CGO_ENABLED=0 \
  go build -ldflags "-X main.buildVersion=${VER}" -o "$OUT" .

echo "built ${VER} (${OS}/${ARCH}) -> ${OUT}"