#!/usr/bin/env bash
# Build cathugger/mkp224o (Tor v3 vanity .onion key generator) into vendor/mkp224o/mkp224o.
# Requires: git, make, gcc or clang, autoconf, pkg-config, libsodium-dev (Debian: libsodium-dev)
#
#   bash scripts/mkp224o-build.sh
#
set -euo pipefail

REPO="$(cd "$(dirname "$0")/.." && pwd)"
VEND="${REPO}/vendor/mkp224o"
BIN="${VEND}/mkp224o"

if [[ -x "${BIN}" ]]; then
  echo "Already built: ${BIN}"
  exit 0
fi

if ! command -v git >/dev/null 2>&1; then
  echo "Install git and retry."
  exit 1
fi

mkdir -p "${REPO}/vendor"
if [[ ! -d "${VEND}/.git" ]]; then
  echo "[*] Cloning mkp224o..."
  git clone --depth 1 https://github.com/cathugger/mkp224o.git "${VEND}"
fi

cd "${VEND}"
if [[ ! -f "./configure" ]]; then
  if [[ -f "./autogen.sh" ]]; then
    echo "[*] autogen.sh..."
    ./autogen.sh
  else
    echo "No configure/autogen in ${VEND}"
    exit 1
  fi
fi

if [[ ! -f "./Makefile" ]]; then
  echo "[*] configure..."
  # Prefer AMD64 fast curve implementation when available
  if ./configure --help 2>/dev/null | grep -q 'enable-amd64-64-24k'; then
    ./configure --enable-amd64-64-24k
  else
    ./configure
  fi
fi

echo "[*] make -j \$(nproc)..."
make -j"$(nproc)"

if [[ ! -x "${BIN}" ]]; then
  echo "Build failed: ${BIN} not executable"
  exit 1
fi

echo "Built: ${BIN}"
echo "Mine a prefix: bash ${REPO}/scripts/vanity-onion-mine.sh <prefix>"