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Deprecate hacky way of making structured attrs

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The method tested for in the previous commit is now deprecated.

Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
This commit is contained in:
John Ericson 2025-05-26 13:54:04 -04:00
parent a353b2f4b2
commit 7577d2d3ae
5 changed files with 18 additions and 1 deletions
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3
tests/functional/structured-attrs.sh
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@ -45,6 +45,9 @@ test "$(<<<"$jsonOut" jq '.variables.outputs.value.out' -r)" = "$(<<<"$jsonOut"
hackyExpr='derivation { name = "a"; system = "foo"; builder = "/bin/sh"; __json = builtins.toJSON { a = 1; }; }'
# Check for deprecation message
expectStderr 0 nix-instantiate --expr "$hackyExpr" --eval --strict | grepQuiet "In derivation 'a': setting structured attributes via '__json' is deprecated, and may be disallowed in future versions of Nix. Set '__structuredAttrs = true' instead."
# Check it works with the expected structured attrs
hacky=$(nix-instantiate --expr "$hackyExpr")
nix derivation show "$hacky" | jq --exit-status '."'"$hacky"'".env.__json | fromjson | . == {"a": 1}'