run.sh

#!/usr/bin/env bash
#
# run.sh -- build the native libraries and launch the Onion Router GUI.
#
# 1. Builds libonion_crypto.so + libonion_engine.so (and the test binaries)
#    via the Makefile/CMake wrapper.
# 2. Picks a Python interpreter that actually has PyGObject/GTK available
#    (the system /usr/bin/python3 usually does; a pyenv shim often does not).
# 3. Launches the GTK front-end.
#
# Usage:
#     ./run.sh              # build + run the GUI
#     ./run.sh --test       # build + run the C/C++ test suites, then exit
#     ./run.sh --no-build   # skip the build step, just launch
#
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
cd "$SCRIPT_DIR"

DO_BUILD=1
DO_TEST=0
for arg in "$@"; do
    case "$arg" in
        --no-build) DO_BUILD=0 ;;
        --test)     DO_TEST=1 ;;
        -h|--help)
            grep '^#' "$0" | sed 's/^# \{0,1\}//'
            exit 0
            ;;
        *) echo "Unknown option: $arg" >&2; exit 2 ;;
    esac
done

# --- 1. Build --------------------------------------------------------------
if [[ "$DO_BUILD" -eq 1 ]]; then
    echo ">> Building native libraries ..."
    if command -v cmake >/dev/null 2>&1; then
        make build
    else
        echo "cmake not found; falling back to a direct compiler invocation." >&2
        mkdir -p build/lib
        gcc  -O2 -Wall -Wextra -fPIC -shared \
             -o build/lib/libonion_crypto.so src/crypto/*.c -lcrypto
        g++  -O2 -std=c++17 -fPIC -shared \
             -o build/lib/libonion_engine.so src/engine/*.cpp \
             -Isrc/crypto -Isrc/engine -Lbuild/lib -lonion_crypto -lcrypto
    fi
fi

if [[ "$DO_TEST" -eq 1 ]]; then
    echo ">> Running test suites ..."
    make test
    exit 0
fi

# --- 2. Find a GTK-capable Python -----------------------------------------
pick_python() {
    local candidates=("/usr/bin/python3" "python3" "python")
    if [[ -n "${ONION_PYTHON:-}" ]]; then
        candidates=("$ONION_PYTHON" "${candidates[@]}")
    fi
    for py in "${candidates[@]}"; do
        if command -v "$py" >/dev/null 2>&1; then
            if "$py" - <<'PY' >/dev/null 2>&1
import gi
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk  # noqa
PY
            then
                echo "$py"
                return 0
            fi
        fi
    done
    return 1
}

PYTHON="$(pick_python || true)"
if [[ -z "$PYTHON" ]]; then
    cat >&2 <<'MSG'
ERROR: could not find a Python interpreter with PyGObject/GTK 3.

Install the GTK stack, for example on Debian/Ubuntu:

    sudo apt-get install -y python3-gi python3-gi-cairo gir1.2-gtk-3.0 \
                            libgirepository1.0-dev pkg-config

Then re-run ./run.sh  (or set ONION_PYTHON=/path/to/python).
MSG
    exit 1
fi

# --- 3. Launch -------------------------------------------------------------
echo ">> Launching Onion Router GUI with: $PYTHON"
export ONION_LIB_DIR="${ONION_LIB_DIR:-$SCRIPT_DIR/build/lib}"
exec "$PYTHON" src/gui/main.py