forked from lix-project/lix
60b7121d2c
We want to be able to write down `foo.drv^bar.drv^baz`:
`foo.drv^bar.drv` is the dynamic derivation (since it is itself a
derivation output, `bar.drv` from `foo.drv`).
To that end, we create `Single{Derivation,BuiltPath}` types, that are
very similar except instead of having multiple outputs (in a set or
map), they have a single one. This is for everything to the left of the
rightmost `^`.
`NixStringContextElem` has an analogous change, and now can reuse
`SingleDerivedPath` at the top level. In fact, if we ever get rid of
`DrvDeep`, `NixStringContextElem` could be replaced with
`SingleDerivedPath` entirely!
Important note: some JSON formats have changed.
We already can *produce* dynamic derivations, but we can't refer to them
directly. Today, we can merely express building or example at the top
imperatively over time by building `foo.drv^bar.drv`, and then with a
second nix invocation doing `<result-from-first>^baz`, but this is not
declarative. The ethos of Nix of being able to write down the full plan
everything you want to do, and then execute than plan with a single
command, and for that we need the new inductive form of these types.
Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
#include <nlohmann/json.hpp>
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#include <gtest/gtest.h>
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#include <rapidcheck/gtest.h>
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#include "tests/derived-path.hh"
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#include "tests/libexpr.hh"
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namespace nix {
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// Testing of trivial expressions
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class DerivedPathExpressionTest : public LibExprTest {};
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// FIXME: `RC_GTEST_FIXTURE_PROP` isn't calling `SetUpTestSuite` because it is
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// no a real fixture.
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//
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// See https://github.com/emil-e/rapidcheck/blob/master/doc/gtest.md#rc_gtest_fixture_propfixture-name-args
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TEST_F(DerivedPathExpressionTest, force_init)
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{
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}
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RC_GTEST_FIXTURE_PROP(
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DerivedPathExpressionTest,
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prop_opaque_path_round_trip,
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(const SingleDerivedPath::Opaque & o))
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{
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auto * v = state.allocValue();
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state.mkStorePathString(o.path, *v);
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auto d = state.coerceToSingleDerivedPath(noPos, *v, "");
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RC_ASSERT(SingleDerivedPath { o } == d);
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}
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// TODO use DerivedPath::Built for parameter once it supports a single output
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// path only.
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RC_GTEST_FIXTURE_PROP(
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DerivedPathExpressionTest,
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prop_built_path_placeholder_round_trip,
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(const StorePath & drvPath, const StorePathName & outputName))
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{
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/**
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* We set these in tests rather than the regular globals so we don't have
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* to worry about race conditions if the tests run concurrently.
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*/
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ExperimentalFeatureSettings mockXpSettings;
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mockXpSettings.set("experimental-features", "ca-derivations");
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auto * v = state.allocValue();
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state.mkOutputString(*v, drvPath, outputName.name, std::nullopt, mockXpSettings);
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auto [d, _] = state.coerceToSingleDerivedPathUnchecked(noPos, *v, "");
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SingleDerivedPath::Built b {
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.drvPath = makeConstantStorePathRef(drvPath),
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.output = outputName.name,
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};
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RC_ASSERT(SingleDerivedPath { b } == d);
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}
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RC_GTEST_FIXTURE_PROP(
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DerivedPathExpressionTest,
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prop_built_path_out_path_round_trip,
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(const StorePath & drvPath, const StorePathName & outputName, const StorePath & outPath))
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{
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auto * v = state.allocValue();
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state.mkOutputString(*v, drvPath, outputName.name, outPath);
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auto [d, _] = state.coerceToSingleDerivedPathUnchecked(noPos, *v, "");
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SingleDerivedPath::Built b {
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.drvPath = makeConstantStorePathRef(drvPath),
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.output = outputName.name,
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};
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RC_ASSERT(SingleDerivedPath { b } == d);
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}
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} /* namespace nix */
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