tvl-depot/third_party/nix/tests/lang.sh
Vincent Ambo 1390827b9e refactor(3p/nix): Revert VectorBindings implementation
This reverts parts of the CLs splitting the backing implementation for
Bindings and moves back to only the BTreeMap-backed implementation.

Our evaluation has indicated that the Vector-backed implementation
does not match the performance of the plain array used upstream, and
in my view the complexity introduced by it is not worth the relatively
small (single-digit percentage) performance increase with a
pivot-point close to the number of attributes yielded by
stdenv.mkDerivation.

Going forward we will trial implementations of attribute sets backed
by HAMTs, and investigate other mechanisms of speeding up the language.

Some changes from the previous CLs are retained, for example the
removal of insert_or_assign and the passing of capacity.

Change-Id: I6eb4b075b453949583360755055c21a29d7ff642
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1172
Reviewed-by: glittershark <grfn@gws.fyi>
Tested-by: BuildkiteCI
2020-07-15 00:16:06 +00:00

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export TEST_VAR=foo # for eval-okay-getenv.nix
nix-instantiate --eval -E 'builtins.trace "Hello" 123' 2>&1 | grep -q Hello
(! nix-instantiate --show-trace --eval -E 'builtins.addErrorContext "Hello" 123' 2>&1 | grep -q Hello)
nix-instantiate --show-trace --eval -E 'builtins.addErrorContext "Hello" (throw "Foo")' 2>&1 | grep -q Hello
set +x
fail=0
for i in lang/parse-fail-*.nix; do
echo "parsing $i (should fail)";
i=$(basename $i .nix)
if nix-instantiate --parse - < lang/$i.nix; then
echo "FAIL: $i shouldn't parse"
fail=1
fi
done
for i in lang/parse-okay-*.nix; do
echo "parsing $i (should succeed)";
i=$(basename $i .nix)
if ! nix-instantiate --parse - < lang/$i.nix > lang/$i.out; then
echo "FAIL: $i should parse"
fail=1
fi
done
for i in lang/eval-fail-*.nix; do
echo "evaluating $i (should fail)";
i=$(basename $i .nix)
if nix-instantiate --eval lang/$i.nix; then
echo "FAIL: $i shouldn't evaluate"
fail=1
fi
done
for i in lang/eval-okay-*.nix; do
echo "evaluating $i (should succeed)";
i=$(basename $i .nix)
if test -e lang/$i.exp; then
flags=
if test -e lang/$i.flags; then
flags=$(cat lang/$i.flags)
fi
if ! NIX_PATH=lang/dir3:lang/dir4 nix-instantiate $flags --eval --strict lang/$i.nix > lang/$i.out; then
echo "FAIL: $i should evaluate"
fail=1
elif ! diff lang/$i.out lang/$i.exp; then
echo "FAIL: evaluation result of $i not as expected"
fail=1
fi
fi
if test -e lang/$i.exp.xml; then
if ! nix-instantiate --eval --xml --no-location --strict \
lang/$i.nix > lang/$i.out.xml; then
echo "FAIL: $i should evaluate"
fail=1
elif ! cmp -s lang/$i.out.xml lang/$i.exp.xml; then
echo "FAIL: XML evaluation result of $i not as expected"
fail=1
fi
fi
done
exit $fail