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#!/usr/bin/env bash | ||
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# This small wrapper over `nix-shell`, called from package.json | ||
# (e.g. `yarn nix:testnet`) allows to specify an initial command to be | ||
# run inside the `nix-shell` once its ready, e.g.: | ||
# | ||
# $ yarn nix:testnet yarn dev | ||
# | ||
# After the command finishes, you will still be left inside the | ||
# nix-shell. | ||
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if [ $# -lt 2 ] ; then | ||
echo >&2 'fatal: usage: '"$0"' <network> <cluster> [<initial command> ...]' | ||
exit 1 | ||
fi | ||
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NETWORK="$1" ; shift | ||
cluster="$1" ; shift | ||
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# Unfortunately, we need to shell-escape the command: | ||
# cf. <https://github.com/NixOS/nixpkgs/blob/877eb10cfbdb3e3d54bdc7a7f6fd3c4b4e6396da/lib/strings.nix#L310-L328> | ||
command='' | ||
while [ $# -gt 0 ] ; do | ||
command="$command '""${1//\'/\'\\\'\'}""'" ; shift | ||
done | ||
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if [ -z "$command" ] ; then | ||
command=':' # no-op, if no command | ||
fi | ||
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export NETWORK | ||
# `return` will make the user stay in `nix-shell` after the initial command finishes: | ||
exec nix-shell --argstr nodeImplementation cardano --argstr cluster "$cluster" --command "$command ; return" |
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