nixpkgs/pkgs/top-level/metrics.nix

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{ nixpkgs, pkgs }:
with pkgs;
runCommand "nixpkgs-metrics"
{ nativeBuildInputs = with pkgs.lib; map getBin [ nix time jq ];
requiredSystemFeatures = [ "benchmark" ];
}
''
export NIX_DB_DIR=$TMPDIR
export NIX_STATE_DIR=$TMPDIR
nix-store --init
mkdir -p $out/nix-support
touch $out/nix-support/hydra-build-products
run() {
local name="$1"
shift
echo "running $@"
NIX_SHOW_STATS=1 time -o stats-time "$@" 2>stats-nix
sed '/^warning:/d' -i stats-nix
cat stats-nix; echo; cat stats-time; echo
x=$(jq '.cpuTime' < stats-nix)
[[ -n $x ]] || exit 1
echo "$name.time $x s" >> $out/nix-support/hydra-metrics
x=$(sed -e 's/.* \([0-9]\+\)maxresident.*/\1/ ; t ; d' < stats-time)
[[ -n $x ]] || exit 1
echo "$name.maxresident $x KiB" >> $out/nix-support/hydra-metrics
# nix-2.2 also outputs .symbols.bytes but that wasn't summed originally
# https://github.com/NixOS/nix/pull/2392/files#diff-8e6ba8c21672fc1a5f6f606e1e101c74L1762
x=$(jq '[.envs,.list,.values,.sets] | map(.bytes) | add' < stats-nix)
[[ -n $x ]] || exit 1
echo "$name.allocations $x B" >> $out/nix-support/hydra-metrics
x=$(jq '.values.number' < stats-nix)
[[ -n $x ]] || exit 1
echo "$name.values $x" >> $out/nix-support/hydra-metrics
}
run nixos.smallContainer nix-instantiate --dry-run ${nixpkgs}/nixos/release.nix \
-A closures.smallContainer.x86_64-linux --show-trace
run nixos.kde nix-instantiate --dry-run ${nixpkgs}/nixos/release.nix \
-A closures.kde.x86_64-linux --show-trace
run nixos.lapp nix-instantiate --dry-run ${nixpkgs}/nixos/release.nix \
-A closures.lapp.x86_64-linux --show-trace
run nix-env.qa nix-env -f ${nixpkgs} -qa
run nix-env.qaDrv nix-env -f ${nixpkgs} -qa --drv-path --meta --xml
num=$(nix-env -f ${nixpkgs} -qa | wc -l)
echo "nix-env.qaCount $num" >> $out/nix-support/hydra-metrics
num=$(nix-env -f ${nixpkgs} -qa --drv-path | wc -l)
echo "nix-env.qaCountDrv $num" >> $out/nix-support/hydra-metrics
# TODO: this has been ignored for some time
# GC Warning: Bad initial heap size 128k - ignoring it.
#export GC_INITIAL_HEAP_SIZE=128k
run nix-env.qaAggressive nix-env -f ${nixpkgs} -qa
run nix-env.qaDrvAggressive nix-env -f ${nixpkgs} -qa --drv-path --meta --xml
lines=$(find ${nixpkgs} -name "*.nix" -type f | xargs cat | wc -l)
echo "loc $lines" >> $out/nix-support/hydra-metrics
''