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#!/bin/bash
# Build fully static MUSL binary for caching_relay using Alpine Docker.
# Produces a truly portable binary with zero runtime dependencies.
# Adapted from c-relay's build_static.sh.
set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DOCKERFILE="$SCRIPT_DIR/Dockerfile.alpine-musl"
# Parse command line arguments
DEBUG_BUILD=false
TARGET_ARCH=""
while [[ $# -gt 0 ]]; do
case "$1" in
--debug)
DEBUG_BUILD=true
shift
;;
--arch)
if [[ -z "$2" ]]; then
echo "ERROR: --arch requires a value"
echo "Usage: $0 [--debug] [--arch <arm64|x86_64>]"
exit 1
fi
case "$2" in
arm64|x86_64)
TARGET_ARCH="$2"
;;
*)
echo "ERROR: Unsupported architecture '$2'"
echo "Supported values: arm64, x86_64"
exit 1
;;
esac
shift 2
;;
*)
echo "ERROR: Unknown argument '$1'"
echo "Usage: $0 [--debug] [--arch <arm64|x86_64>]"
exit 1
;;
esac
done
if [ "$DEBUG_BUILD" = true ]; then
echo "=========================================="
echo "caching_relay MUSL Static Binary Builder (DEBUG MODE)"
echo "=========================================="
else
echo "=========================================="
echo "caching_relay MUSL Static Binary Builder (PRODUCTION MODE)"
echo "=========================================="
fi
echo "Project directory: $SCRIPT_DIR"
echo ""
if ! command -v docker &> /dev/null; then
echo "ERROR: Docker is not installed or not in PATH"
exit 1
fi
if ! docker info &> /dev/null; then
echo "ERROR: Docker daemon is not running or user not in docker group"
exit 1
fi
echo "Docker is available and running"
echo ""
# Detect host architecture
ARCH=$(uname -m)
case "$ARCH" in
x86_64) ARCH="x86_64";;
aarch64) ARCH="arm64";;
arm64) ARCH="arm64";;
esac
if [[ -n "$TARGET_ARCH" ]]; then
ARCH="$TARGET_ARCH"
echo "Using target architecture: $ARCH"
else
echo "Detected host architecture: $ARCH"
fi
echo ""
# nostr_core_lib is inside the c-relay-pg project root (one dir up from caching/).
# Copy it into the Docker build context (excluding .git and build artifacts).
NOSTR_CORE_DIR="$SCRIPT_DIR/../nostr_core_lib"
if [ ! -d "$NOSTR_CORE_DIR" ]; then
echo "ERROR: nostr_core_lib not found at $NOSTR_CORE_DIR"
exit 1
fi
NEEDS_COPY=1
if [ -d "$SCRIPT_DIR/nostr_core_lib" ] && [ ! -L "$SCRIPT_DIR/nostr_core_lib" ]; then
# Already a real directory (e.g. from a previous run); assume it's good.
NEEDS_COPY=0
fi
if [ "$NEEDS_COPY" = "1" ]; then
echo "Copying nostr_core_lib into build context..."
rm -rf "$SCRIPT_DIR/nostr_core_lib"
mkdir -p "$SCRIPT_DIR/nostr_core_lib"
rsync -a --exclude='.git' --exclude='*.a' --exclude='*.o' \
--exclude='.venv*' --exclude='backups' --exclude='verify_*' \
--exclude='rewrite_mirror' --exclude='websocket_debug' \
"$NOSTR_CORE_DIR/" "$SCRIPT_DIR/nostr_core_lib/"
COPIED_NOSTR_CORE=1
fi
# Build args
BUILD_ARGS="--build-arg DEBUG_BUILD=$DEBUG_BUILD"
if [ "$ARCH" = "arm64" ] && [ "$(uname -m)" != "aarch64" ] && [ "$(uname -m)" != "arm64" ]; then
BUILD_ARGS="$BUILD_ARGS --platform linux/arm64"
fi
IMAGE_TAG="caching_relay_builder:latest"
echo "Building Docker image..."
docker build $BUILD_ARGS \
-f "$DOCKERFILE" \
-t "$IMAGE_TAG" \
"$SCRIPT_DIR" 2>&1
BUILD_RC=$?
# Clean up the copied nostr_core_lib to keep the project dir tidy.
if [ "${COPIED_NOSTR_CORE:-0}" = "1" ]; then
echo "Cleaning up copied nostr_core_lib from build context..."
rm -rf "$SCRIPT_DIR/nostr_core_lib"
fi
if [ $BUILD_RC -ne 0 ]; then
exit $BUILD_RC
fi
echo ""
echo "Extracting binary from image..."
# The output stage is FROM scratch with no CMD, so pass an empty command.
CONTAINER_ID=$(docker create "$IMAGE_TAG" "")
docker cp "$CONTAINER_ID:/caching_relay_static" "$SCRIPT_DIR/caching_relay"
docker rm "$CONTAINER_ID" >/dev/null
chmod +x "$SCRIPT_DIR/caching_relay"
echo ""
echo "=== Build complete ==="
ls -lh "$SCRIPT_DIR/caching_relay"
file "$SCRIPT_DIR/caching_relay"