#!/bin/bash
# mint-zuse.sh -- a Zuse of the demo's own, as a stick (issue #111, ruled by Captain Bob,
# 2026-11-06: "Mint Zuse for demo console").
#
#   demo/mint-zuse.sh <out-dir>
#
# A fresh pair, never anyone's real Zuse: whatever a visitor does as this Zuse stays in a
# throwaway machine, and the drive's writes are discarded (qemu-args.sh). Minted the way
# disk/zuse-scratch was (disk/README.md): a blank 1 GiB Artemis disk and a blank 64 MiB identity
# drive, booted with system=v3 on amd64 -- "Zuse: genesis minted onto attached thumbdrive" --
# then booted again -- "Zuse: identity confirmed from attached thumbdrive" -- then laid out as a
# StarshipOS stick (make zusestick), which is what the v4 demo machine attaches.
#
# <out-dir> gets artemis.img and zuse-thumb-ident.img (the pair) and zusestick.img (the stick).
# Two QEMU boots, one at a time, in the foreground; their serial logs go to logs/ as any boot's.
set -euo pipefail
cd "$(dirname "$0")/.."
out=$(realpath -m "${1:?usage: demo/mint-zuse.sh <out-dir>}")
[ ! -e "$out/zuse-thumb-ident.img" ] || { echo "demo: $out already has a pair -- refusing to mint over it" >&2; exit 1; }
mkdir -p "$out"
truncate -s 1G  "$out/artemis.img"
truncate -s 64M "$out/zuse-thumb-ident.img"

boot() {   # boot <what to wait for> <what means it failed>: one system=v3 boot with the pair attached
    local want=$1 bad=$2 mk log qmp t0
    mk=$(mktemp)
    make --no-print-directory -f kernel/Makefile ARCH=amd64 clean qemu QEMU_DISPLAY=none \
        KERNEL_ARGS=system=v3 ARTDISK="$out/artemis.img" ZUSEDISK="$out/zuse-thumb-ident.img" > "$mk" 2>&1 &
    local pid=$!
    t0=$(date +%s)
    until log=$(sed -n 's/^  Serial log: //p' "$mk") && [ -n "$log" ] && grep -aq -- "$want" "$log" 2>/dev/null; do
        if [ -n "${log:-}" ] && grep -aq -- "$bad" "$log" 2>/dev/null; then echo "demo: '$bad'" >&2; kill $pid; exit 1; fi
        kill -0 $pid 2>/dev/null || { echo "demo: the boot ended without '$want'" >&2; tail -20 "$mk" >&2; exit 1; }
        [ $(( $(date +%s) - t0 )) -lt 900 ] || { echo "demo: no '$want' in 900s" >&2; kill $pid; exit 1; }
        sleep 2
    done
    echo "demo: $want ($log, $(( $(date +%s) - t0 ))s)"
    qmp=$(sed -n 's/^  QMP socket: //p' "$mk")
    python3 - "$qmp" <<'PY'
import json, socket, sys
s = socket.socket(socket.AF_UNIX); s.connect(sys.argv[1]); f = s.makefile("rw")
f.readline()
for c in ({"execute": "qmp_capabilities"}, {"execute": "quit"}):
    f.write(json.dumps(c) + "\n"); f.flush(); f.readline()
PY
    wait $pid || true
    rm -f "$mk"
}

boot "Zuse: genesis minted onto attached thumbdrive" "fence marker write FAILED"
boot "Zuse: identity confirmed from attached thumbdrive" "not recognized"
make --no-print-directory -f kernel/Makefile ARCH=amd64 zusestick ZUSE_PAIR="$out"
cp build/amd64/kernel/zusestick.img "$out/zusestick.img"
git checkout -q -- capsules/BLOCK_MAP.md v3/include/version.h 2>/dev/null || true   # the build regenerates these
echo "demo: Zuse minted -- $out/zusestick.img"