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dotfiles/home/programs/custom-nix-cache.nix

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Nix

{ config, lib, secret, ... }:
let
user-bin-directory = "${config.home.homeDirectory}/.bin";
cache = secret.nix-cache.nifoc;
in
{
home.file."${user-bin-directory}/upload-nifoc-nix-cache" = lib.mkIf cache.enabled {
text = ''
#!/usr/bin/env nix-shell
#!nix-shell -i bash -p sqlite
# Make sure the files are available to root on NixOS and macOS
sudo mkdir ${cache.rootDir}/.aws 2> /dev/null
sudo cp "$HOME/.aws/credentials" ${cache.rootDir}/.aws/
minTimestamp=$(expr $(date +%s) - 3600)
uncachedHashes=$(echo "SELECT DISTINCT hashPart FROM NARs WHERE present = 0 AND timestamp >= $minTimestamp;" | sudo sqlite3 "${cache.database}")
signingKey="$HOME/.config/nifoc-nix/${cache.signingKey}"
for uncachedHash in $uncachedHashes; do
storePath=$(readlink -f /nix/store/$uncachedHash-*)
if [[ $storePath == *"darwin-system"* ]] ||
[[ $storePath == *"nixos-system"* ]] ||
[[ $storePath == *"home-manager-generation"* ]] ||
[[ $storePath == *"-etc" ]] ||
[[ $storePath == *"-source" ]] ||
[[ $storePath == *".drv" ]] ||
[[ $storePath == *".drv.chroot" ]] ||
[[ $storePath == *".check" ]] ||
[[ $storePath == *".lock" ]]; then
continue
fi
if [ "$1" = "--list" ]; then
echo "$storePath"
else
sudo -H nix store sign --key-file $signingKey $storePath
echo "Uploading $storePath ..."
sudo -H nix copy --to '${cache.s3Url}' $storePath
fi
done
'';
executable = true;
};
home.file."${config.home.homeDirectory}/.aws/credentials" = lib.mkIf cache.enabled {
text = ''
[nixbldr]
aws_access_key_id=${cache.accessKeyId}
aws_secret_access_key=${cache.secretAccessKey}
'';
};
xdg.configFile."nifoc-nix/${cache.signingKey}" = lib.mkIf cache.enabled {
text = cache.signingKeyValue;
};
}