tests/run.sh: Check that env is mostly unmodified

This commit is contained in:
Robert Hensing 2024-06-10 11:39:06 +02:00
parent e0b4691754
commit 68b8a28bc4
2 changed files with 43 additions and 0 deletions

View file

@ -27,5 +27,26 @@ nix run --no-write-lock-file .#pkgAsPkg
! nix run --no-write-lock-file .#pkgAsApp || fail "'nix run' shouldnt accept an 'app' defined under 'packages'"
! nix run --no-write-lock-file .#appAsPkg || fail "elements of 'apps' should be of type 'app'"
# Test that we're not setting any more environment variables than necessary.
# For instance, we might set an environment variable temporarily to affect some
# initialization or whatnot, but this must not leak into the environment of the
# command being run.
env > $TEST_ROOT/expected-env
nix run -f shell-hello.nix env > $TEST_ROOT/actual-env
# Remove/reset variables we expect to be different.
# - PATH is modified by nix shell
# - _ is set by bash and is expected to differ because it contains the original command
# - __CF_USER_TEXT_ENCODING is set by macOS and is beyond our control
sed -i \
-e 's/PATH=.*/PATH=.../' \
-e 's/_=.*/_=.../' \
-e '/^__CF_USER_TEXT_ENCODING=.*$/d' \
$TEST_ROOT/expected-env $TEST_ROOT/actual-env
sort $TEST_ROOT/expected-env | uniq > $TEST_ROOT/expected-env.sorted
# nix run appears to clear _. I don't understand why. Is this ok?
echo "_=..." >> $TEST_ROOT/actual-env
sort $TEST_ROOT/actual-env | uniq > $TEST_ROOT/actual-env.sorted
diff $TEST_ROOT/expected-env.sorted $TEST_ROOT/actual-env.sorted
clearStore

View file

@ -55,4 +55,26 @@ rec {
chmod +x $out/bin/hello
'';
};
# execs env from PATH, so that we can probe the environment
# does not allow arguments, because we don't need them
env = mkDerivation {
name = "env";
outputs = [ "out" ];
buildCommand =
''
mkdir -p $out/bin
cat > $out/bin/env <<EOF
#! ${shell}
if [ $# -ne 0 ]; then
echo "env: Unexpected arguments ($#): $@" 1>&2
exit 1
fi
exec env
EOF
chmod +x $out/bin/env
'';
};
}