jamdisk

#!/bin/sh
set -e

if [ -z "$(which ldd)" ]; then
	printf "Require working ldd\n"
	exit 1
fi

. ./functions

ROOT=$(mktemp -d)
JAMDISK=$(pwd)
PROJECT="jamdisk"

if [ -n "$1" ]; then
	PROJECT="$1"
fi

printf "Working in %s, building project %s\n" "$ROOT" "$PROJECT"

printf "Processing required files\n"
(
	set +e
	cd "$ROOT"
	want_bin busybox

	if [ -f "$JAMDISK/$PROJECT.script" ]; then
		. "$JAMDISK/$PROJECT.script"
	fi
)

printf "Installing custom override files\n"
if [ -d "$PROJECT" ]; then
	cp -dr "$PROJECT/." "$ROOT"
fi

printf "Installing init\n"
cp init "$ROOT"
cp udhcpc.script "$ROOT"

printf "Building initial RAM filesystem\n"
(cd "$ROOT"; find . -print0 | cpio --null -o --format=newc | gzip -9) > "$PROJECT.initrd"

printf "Cleaning up\n"
rm -rf "$ROOT"

printf "Done building %s, please use kernel %s (probably from /boot) to run it\n" "$PROJECT.initrd" "$(uname -r)"