#!/usr/bin/env bash
set -euo pipefail

DISTRO="$(lsb_release -is 2>/dev/null || echo unknown)"
RELEASE="$(lsb_release -rs 2>/dev/null || echo unknown)"

if [[ "$DISTRO" != "Debian" || "$RELEASE" != "12" ]] && \
   [[ "$DISTRO" != "Ubuntu" || "$RELEASE" != "22.04" ]]; then
    echo "MontanaOS build environment requires Debian 12 or Ubuntu 22.04 LTS"
    echo "Detected: $DISTRO $RELEASE"
    exit 1
fi

sudo apt-get update
sudo apt-get install -y --no-install-recommends \
    openjdk-21-jdk-headless \
    git gnupg flex bison \
    build-essential zip unzip curl rsync \
    zlib1g-dev libncurses-dev libssl-dev \
    xsltproc fontconfig \
    python3 python-is-python3

mkdir -p "$HOME/.local/bin"
if [[ ! -x "$HOME/.local/bin/repo" ]]; then
    curl -fsSL https://storage.googleapis.com/git-repo-downloads/repo > "$HOME/.local/bin/repo"
    chmod +x "$HOME/.local/bin/repo"
fi

cat <<MSG

MontanaOS build environment ready (Debian/Ubuntu detected).

Add ~/.local/bin to PATH if not already:
    export PATH="\$HOME/.local/bin:\$PATH"

Note on ccache: not installed by default. Use ccache only in dev mode,
release builds run without it (see Spec section 7.2 reproducibility).
To install for dev: sudo apt-get install ccache

Next step: ./scripts/sync-grapheneos.sh
MSG