#!/bin/bash
# build-update-agent.sh — Compile the KubeSolo OS update agent
#
# Builds a static Linux binary for the update agent.
# Output: build/cache/kubesolo-update
#
# Environment:
#   TARGET_ARCH  Target architecture (default: amd64, also supports: arm64)
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
UPDATE_DIR="$PROJECT_ROOT/update"
CACHE_DIR="$PROJECT_ROOT/build/cache"
TARGET_ARCH="${TARGET_ARCH:-amd64}"
OUTPUT="$CACHE_DIR/kubesolo-update"

echo "=== Building KubeSolo Update Agent (linux/$TARGET_ARCH) ==="

# Ensure output dir exists
mkdir -p "$CACHE_DIR"

# Run tests first
echo "--- Running tests ---"
(cd "$UPDATE_DIR" && go test ./... -count=1)

# Build static binary
echo "--- Compiling static binary ---"
(cd "$UPDATE_DIR" && CGO_ENABLED=0 GOOS=linux GOARCH="$TARGET_ARCH" \
    go build -ldflags='-s -w' -o "$OUTPUT" .)

SIZE=$(ls -lh "$OUTPUT" | awk '{print $5}')
echo "--- Update agent built: $OUTPUT ($SIZE) ---"