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check: set HOME to a tmp dir to avoid polluting the working dir #551

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merged 1 commit into from
Jan 19, 2025
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check: set HOME to a tmp dir to avoid polluting the working dir #551

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5 changes: 3 additions & 2 deletions modules/pre-commit.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -86,15 +86,15 @@ let
run =
mkDerivation {
name = "pre-commit-run";

src = cfg.rootSrc;
buildInputs = [ cfg.gitPackage ];
nativeBuildInputs = enabledExtraPackages
++ lib.optional (config.settings.rust.check.cargoDeps != null) cargoSetupHook;
cargoDeps = config.settings.rust.check.cargoDeps;
buildPhase = ''
set +e
HOME=$PWD
# Set HOME to a temporary directory for pre-commit to create its cache files in.
HOME=$(mktemp -d)
ln -fs ${configFile} .pre-commit-config.yaml
git init -q
git add .
Expand All @@ -111,6 +111,7 @@ let
fi
exitcode=$?
git --no-pager diff --color
# Derivations must produce an output
mkdir $out
[ $? -eq 0 ] && exit $exitcode
'';
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