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#!/usr/bin/env bash
#
# Copies a NixOS system to a target host, using the provided key,
# or whatever ambient key is configured if the key is not set.
set -ueo pipefail
export NIX_SSHOPTS="\
-o StrictHostKeyChecking=no\
-o UserKnownHostsFile=/dev/null\
-o GlobalKnownHostsFile=/dev/null"
# If DEPLOY_KEY was passed, write it to $scratch/id_deploy
if [ -n "${DEPLOY_KEY-}" ]; then
scratch="$(mktemp -d)"
trap 'rm -rf -- "${scratch}"' EXIT
echo -n "$DEPLOY_KEY" > $scratch/id_deploy
chmod 0600 $scratch/id_deploy
export NIX_SSHOPTS="$NIX_SSHOPTS -o IdentityFile=$scratch/id_deploy"
fi
nix-copy-closure \
--to ${TARGET_USER}@${TARGET_HOST} \
${SYSTEM_DRV} \
--gzip \
--include-outputs \
--use-substitutes
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