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#!/bin/sh -eu
mkdir -p .gcroots
inherit_shell=''
update=''
while getopts 'su' flag; do
case "${flag}" in
s) inherit_shell='true' ;;
u) update='true' ;;
esac
done
if [[ ! -f "$PWD/.gcroots/shell.drv" || $update ]]; then
nix-instantiate shell.nix --indirect --add-root $PWD/.gcroots/shell.drv > /dev/null
nix-store -r $(nix-store --query --references $PWD/.gcroots/shell.drv) --indirect --add-root $PWD/.gcroots/shell.dep > /dev/null
fi
# Fix to prevent implicit interactiveBash dependency
export NIX_BUILD_SHELL=/run/current-system/sw/bin/bash
if [ $inherit_shell ]; then
exec nix-shell $(readlink $PWD/.gcroots/shell.drv) --command $SHELL
else
exec nix-shell $(readlink $PWD/.gcroots/shell.drv)
fi
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