build

#!/usr/bin/env bash

set -e

APP_NAME="dvs"
# VERSION="v1.0.0"  # optional: tag version
OUTPUT_DIR="releases"

# List of OS/ARCH combinations
PLATFORMS=(
  "linux/amd64"
  "linux/arm64"
  "darwin/amd64"
  "darwin/arm64"
  "windows/amd64"
  "windows/arm64"
)

# Clean and recreate output directory
rm -rf "$OUTPUT_DIR"
mkdir -p "$OUTPUT_DIR"

CHECKSUM_FILE="${OUTPUT_DIR}/checksums.txt"

for PLATFORM in "${PLATFORMS[@]}"; do
  IFS="/" read -r GOOS GOARCH <<<"$PLATFORM"
  BIN_NAME="$APP_NAME"
  ARCHIVE_NAME="${APP_NAME}-${GOOS}-${GOARCH}"

  if [ "$GOOS" = "windows" ]; then
    BIN_NAME="${APP_NAME}.exe"
    ARCHIVE_FILE="${OUTPUT_DIR}/${ARCHIVE_NAME}.zip"
  else
    ARCHIVE_FILE="${OUTPUT_DIR}/${ARCHIVE_NAME}.tar.gz"
  fi

  echo "→ Building for $GOOS/$GOARCH"

  # Set env vars and build with reproducible flags
  env GOOS=$GOOS GOARCH=$GOARCH CGO_ENABLED=0 go build \
    -ldflags="-s -w" \
    -trimpath \
    -o "$BIN_NAME"

  # Generate checksum for the binary before packaging
  if command -v sha256sum >/dev/null 2>&1; then
    echo "$(sha256sum "$BIN_NAME" | cut -d' ' -f1)  ${ARCHIVE_NAME}/${BIN_NAME}" >>"$CHECKSUM_FILE"
  elif command -v shasum >/dev/null 2>&1; then
    echo "$(shasum -a 256 "$BIN_NAME" | cut -d' ' -f1)  ${ARCHIVE_NAME}/${BIN_NAME}" >>"$CHECKSUM_FILE"
  else
    echo "Warning: No SHA256 utility found, skipping checksum generation"
  fi

  # Package binary
  mkdir -p tmp_build
  mv "$BIN_NAME" tmp_build/

  # Copy LICENSE and README files if they exist
  for file in LICENSE README.md; do
    if [ -f "$file" ]; then
      cp "$file" tmp_build/
    fi
  done

  if [[ "$ARCHIVE_FILE" == *.zip ]]; then
    (cd tmp_build && zip -r "../$ARCHIVE_FILE" * >/dev/null)
  else
    (cd tmp_build && tar -czf "../$ARCHIVE_FILE" *)
  fi

  # Cleanup temp
  rm -rf tmp_build
done

echo "✅ All binaries built and packaged in ./$OUTPUT_DIR"
if [ -f "$CHECKSUM_FILE" ]; then
  echo "✅ Binary checksums generated in ./$CHECKSUM_FILE"
fi