#!/usr/bin/env bash
# meson install-time script (meson.add_install_script) -- runs after the
# xceadmin custom_target (build_by_default) has already installed+tested
# into its own build-dir venv (meson-build.sh). This script does NOT copy
# that venv wholesale: pip's generated console_scripts wrapper hardcodes
# the *build-directory* absolute path in its shebang, which stops existing
# once the build dir is cleaned up -- copying it verbatim into $out would
# ship a binary with a shebang pointing at nowhere.
#
# Instead: copy just the xceadmin/xcecommon package dirs (pure files, no
# shebang) into $out, and hand-write a wrapper whose shebang and PYTHONPATH
# are resolved against *this* install script's own environment (python3 --
# passed in as $1, meson's own resolved interpreter (import('python').
# find_installation()) from meson.build, not a fresh `command -v python3`
# lookup here -- and the nix-provided pycapnp/pyyaml/jsonschema/click
# site-packages come from nativeBuildInputs, same as every other phase of
# this derivation) -- every path baked in below is a real /nix/store path,
# so nix's reference scanner picks each one up as a proper runtime
# dependency of $out.
set -euo pipefail

PYTHON="$1"
DESTDIR_PREFIX="$MESON_INSTALL_DESTDIR_PREFIX"

VENV_SITE_GLOB=("$MESON_BUILD_ROOT"/xceadmin/.venv/lib/python3.*/site-packages)
VENV_SITE="${VENV_SITE_GLOB[0]}"
if [ ! -d "$VENV_SITE/xceadmin" ]; then
    echo "meson-install.sh: expected $VENV_SITE/xceadmin from the xceadmin build step, not found" >&2
    exit 1
fi

SITE_DIR="$DESTDIR_PREFIX/lib/xceadmin-site"
mkdir -p "$SITE_DIR" "$DESTDIR_PREFIX/bin"
rm -rf "$SITE_DIR/xceadmin" "$SITE_DIR/xcecommon"
cp -r "$VENV_SITE/xceadmin" "$VENV_SITE/xcecommon" "$SITE_DIR/"

cat > "$DESTDIR_PREFIX/bin/xceadmin" <<WRAPPER
#!/usr/bin/env bash
export PYTHONPATH="$SITE_DIR:${PYTHONPATH:-}"
exec "$PYTHON" -m xceadmin.cli "\$@"
WRAPPER
chmod +x "$DESTDIR_PREFIX/bin/xceadmin"

echo "=== xceadmin (meson install): wrapper installed at $DESTDIR_PREFIX/bin/xceadmin ==="