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# We test various propagation of contexts under other builtins here.
let
drv = derivation {
name = "fail";
builder = "/bin/false";
system = "x86_64-linux";
outputs = [ "out" "foo" ];
};
other-drv = derivation {
name = "other-fail";
builder = "/bin/false";
system = "x86_64-linux";
outputs = [ "out" "bar" ];
};
# `substr` propagates context, we truncate to an empty string and concatenate to the target
# to infect it with the context of `copied`.
appendContextFrom = copied: target: (builtins.substring 0 0 copied) + target;
path = "${./eval-okay-context-introspection.nix}";
combo-path = "${path}${drv.outPath}${drv.foo.outPath}${drv.drvPath}";
mergeContext = a: b:
builtins.getContext a // builtins.getContext b;
preserveContext = origin: result:
builtins.getContext "${result}" == builtins.getContext "${origin}";
preserveContexts = origins: result:
let union = builtins.foldl' (x: y: x // y) { } (builtins.map (d: builtins.getContext "${d}") origins);
in
union == builtins.getContext "${result}";
in
[
# `toFile` should produce context.
(builtins.hasContext "${(builtins.toFile "myself" "${./eval-okay-context-introspection.nix}")}")
# `derivation` should produce context.
(builtins.hasContext "${drv}")
# Low-level test to ensure that interpolation is working as expected.
(builtins.length (builtins.attrNames (builtins.getContext "${drv}${other-drv}")) == 2)
(builtins.getContext "${drv}${other-drv}" == mergeContext drv other-drv)
# Those three next tests are extremely related.
# To test interpolation, we need concatenation to be working and vice versa.
# In addition, we need `builtins.substring` empty string propagation to attach context
# in absence of `builtins.appendContext`.
# The previous test should ensure that we don't test vacuous truths.
# Substring preserves contexts.
(preserveContext combo-path (builtins.substring 0 0 combo-path)) # <- FIXME: broken
# Interpolation preserves contexts.
(preserveContext "${drv}${other-drv}" (appendContextFrom drv other-drv))
# Concatenation preserves contexts.
(preserveContext "${drv}${other-drv}" (drv + other-drv))
# Special case when Nix does not assert that the length argument is non-negative
# when the starting index is ≥ than the string's length.
# FIXME: those three are broken too, NON DETERMINISTIC!!!
(preserveContext combo-path (builtins.substring 5 (-5) (builtins.substring 0 0 combo-path)))
(preserveContext combo-path (toString combo-path))
# No replacement should yield at least the same context.
(preserveContext combo-path (builtins.replaceStrings [ ] [ ] combo-path))
# This is an idempotent replacement, it should yield therefore to full preservation of the context.
(preserveContext "${drv}${drv}" (builtins.replaceStrings [ "${drv}" ] [ "${drv}" ] "${drv}"))
# There's no context here, so no context should appear from `drv`.
(preserveContext "abc" (builtins.replaceStrings [ "${drv}" ] [ "${drv}" ] "abc"))
# Context should appear by a successful replacement.
(preserveContext "${drv}" (builtins.replaceStrings [ "a" ] [ "${drv}" ] "a"))
# We test multiple successful replacements.
(preserveContexts [ drv other-drv ] (builtins.replaceStrings [ "a" "b" ] [ "${drv}" "${other-drv}" ] "ab"))
# We test *empty* string replacements.
(preserveContext "${drv}" (builtins.replaceStrings [ "" ] [ "${drv}" ] "abc"))
(preserveContext "${drv}" (builtins.replaceStrings [ "" ] [ "${drv}" ] ""))
# There should be no context in a parsed derivation name.
(!builtins.any builtins.hasContext (builtins.attrValues (builtins.parseDrvName "${drv.name}")))
# Nix does not propagate contexts for `match`.
(!builtins.any builtins.hasContext (builtins.match "(.*)" "${drv}"))
# `dirOf` preserves contexts of non-paths.
(preserveContext "${drv}" (builtins.dirOf "${drv}"))
(preserveContext "abc" (builtins.dirOf "abc"))
# `baseNameOf propagates context of argument
(preserveContext "${drv}" (builtins.baseNameOf drv))
(preserveContext "abc" (builtins.baseNameOf "abc"))
# `concatStringsSep` preserves contexts of both arguments.
(preserveContexts [ drv other-drv ] (builtins.concatStringsSep "${other-drv}" (map toString [ drv drv drv drv drv ])))
(preserveContext drv (builtins.concatStringsSep "|" (map toString [ drv drv drv drv drv ])))
(preserveContext other-drv (builtins.concatStringsSep "${other-drv}" [ "abc" "def" ]))
# `attrNames` will never ever produce context.
(preserveContext "abc" (toString (builtins.attrNames { a = { }; b = { }; c = { }; })))
]
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