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#!/usr/bin/env dash
# nixos-config - My current NixOS configuration
#
# Copyright (C) 2025 Jörg Thalheim and contributors
# SPDX-License-Identifier: MIT
#
# This file is part of my nixos-config.
#
# You should have received a copy of the License along with this program.
# If not, see <https://www.gnu.org/licenses/gpl-3.0.txt>.
SHARED_DIR="$(mktemp --directory)"
cleanup() {
rm --recursive "$SHARED_DIR"
}
trap cleanup EXIT
export SHARED_DIR
TMPDIR="$SHARED_DIR"
export TMPDIR
cat <<EOF >"$SHARED_DIR/.env_variables"
{
"pwd": "$PWD",
"term": "$TERM",
"path": "$PATH"
}
EOF
mk_tag() {
additional_path="$1"
# tags must be shorter than 32 bytes
# and must not begin with a digit.
{
printf "a"
echo "$additional_path" | sha256sum | head -c 30
}
}
for raw_additional_path in "$@"; do
additional_path="$(realpath "$raw_additional_path")"
tag="$(mk_tag "$additional_path")"
if [ "$(jq --arg mount "$tag" '.mount.[$mount]' "$SHARED_DIR/.env_variables")" != "null" ]; then
echo "Path '$additional_path' alread added."
shift 1
continue
fi
jq --arg mount "$tag" --arg target "$additional_path" \
'. + {mount: {$mount: $target}}' "$SHARED_DIR/.env_variables" | sponge "$SHARED_DIR/.env_variables"
set -- "$@" -virtfs "local,path=$additional_path,security_model=none,readonly=on,mount_tag=$tag"
shift 1
done
# Do not exec here, as we don't want to lose our cleanup hooks.
"run-$HOST_NAME-vm" "$@"
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