Maximilian Bosch
3b5429aec1
This is needed to push the adoption of structured attrs[1] forward. It's now checked if a `__json` exists in the environment-map of the derivation to be openend in a `nix-shell`. Derivations with structured attributes enabled also make use of a file named `.attrs.json` containing every environment variable represented as JSON which is useful for e.g. `exportReferencesGraph`[2]. To provide an environment similar to the build sandbox, `nix-shell` now adds a `.attrs.json` to `cwd` (which is mostly equal to the one in the build sandbox) and removes it using an exit hook when closing the shell. To avoid leaking internals of the build-process to the `nix-shell`, the entire logic to generate JSON and shell code for structured attrs was moved into the `ParsedDerivation` class. [1] https://nixos.mayflower.consulting/blog/2020/01/20/structured-attrs/ [2] https://nixos.org/manual/nix/unstable/expressions/advanced-attributes.html#advanced-attributes
20 lines
393 B
Nix
20 lines
393 B
Nix
with import ./config.nix;
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let
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dep = mkDerivation {
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name = "dep";
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buildCommand = ''
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mkdir $out; echo bla > $out/bla
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'';
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};
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in
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mkDerivation {
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name = "structured2";
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__structuredAttrs = true;
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outputs = [ "out" "dev" ];
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my.list = [ "a" "b" "c" ];
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exportReferencesGraph.refs = [ dep ];
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buildCommand = ''
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touch ''${outputs[out]}; touch ''${outputs[dev]}
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'';
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}
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