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pkgs/top-level/metrics.nix: just run nix-env -qa once

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If we save the output, we can use it later with a little `jq`.
This commit is contained in:
Philip Taron
2025-09-12 13:15:47 -07:00
parent 146c6b9aad
commit dfd90bf4c0
1 changed files with 6 additions and 11 deletions
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17
pkgs/top-level/metrics.nix
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@@ -45,16 +45,11 @@ stdenvNoCC.mkDerivation {
shift
echo "running $@"
local output="$name.out"
local nix_stats="$name-nix-stats.json"
local time_stats="$name-time-stats.json"
case "$name" in
# Redirect stdout to /dev/null to avoid hitting "Output Limit Exceeded" on Hydra.
nix-env.qaDrv)
NIX_SHOW_STATS=1 NIX_SHOW_STATS_PATH="$nix_stats" time -o "$time_stats" "$@" >/dev/null ;;
*)
NIX_SHOW_STATS=1 NIX_SHOW_STATS_PATH="$nix_stats" time -o "$time_stats" "$@" ;;
esac
NIX_SHOW_STATS=1 NIX_SHOW_STATS_PATH="$nix_stats" time -o "$time_stats" "$@" > "$output"
# Show the Nix statistics and the `time` statistics.
echo "Nix statistics for $@"
@@ -89,11 +84,11 @@ stdenvNoCC.mkDerivation {
run nix-env.qaDrv nix-env --option eval-system "$evalSystem" -f "$nixpkgs" -qa --drv-path --meta --json
# It's slightly unclear which of the set to track: qaCount, qaCountDrv, qaCountBroken.
num="$(nix-env --option eval-system "$evalSystem" -f "$nixpkgs" -qa | wc -l)"
num="$(wc -l < nix-env.qa.out)"
echo "nix-env.qaCount $num" >> $out/nix-support/hydra-metrics
qaCountDrv="$(nix-env --option eval-system "$evalSystem" -f "$nixpkgs" -qa --drv-path | wc -l)"
num="$((num - $qaCountDrv))"
echo "nix-env.qaCountBroken $num" >> $out/nix-support/hydra-metrics
qaCountDrv="$(jq -r 'reduce .[].drvPath as $d (0; .+1)' < nix-env.qaDrv.out)"
numBroken="$((num - $qaCountDrv))"
echo "nix-env.qaCountBroken $numBroken" >> $out/nix-support/hydra-metrics
lines="$(find "$nixpkgs" -name "*.nix" -type f | xargs cat | wc -l)"
echo "loc $lines" >> $out/nix-support/hydra-metrics