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# run with
# nix-shell shell.nix --run 'touch in ; tail -f in | bash & echo $! > pid'
# and then send commands with
# echo 'compute_me "1 + 3"' >> in
{ pkgs ? import <nixpkgs> {} }:
pkgs.mkShell {
buildInputs = [ pkgs.bc ];
shellHook = ''
compute_me() {
echo "$1" | bc;
}
export -f compute_me
echo "I’m ready"
'';
}
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