#!/bin/sh
# Generate CPIO initial ramdisk from built application binaries.
# Usage: gen_initrd.sh <binaries_dir> <output_file>
# Packs all files in <binaries_dir> into a newc-format CPIO archive.
set -e

BIN_DIR="$1"
OUTPUT="$2"

# Ensure output directory exists
mkdir -p "$(dirname "$OUTPUT")"

cd "$BIN_DIR"
# Only pack actual binary files (no .o, .elf intermediates)
find . -maxdepth 1 -type f ! -name '*.o' ! -name '*.elf' | cpio -o -H newc > "$OUTPUT" 2>/dev/null
echo "Generated initrd: $(wc -c < "$OUTPUT") bytes"