Include the source location when warning about inefficient double copies#79
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(Actually, this adds a position field to *all* values.)
This allows improving the "inefficient double copy" warning by showing
where the source path came from in the source, e.g.
warning: Performing inefficient double copy of path '/home/eelco/Dev/patchelf/' to the store at /home/eelco/Dev/patchelf/flake.nix:30:17. This can typically be avoided by rewriting an attribute like `src = ./.` to `src = builtins.path { path = ./.; name = "source"; }`.
grahamc
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This could probably use a quick performance regression test, to make sure that adding a |
gustavderdrache
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Jun 2, 2025
grahamc
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Jun 2, 2025
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Got confirmation on Slack that there was no measurable performance impact. |
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Motivation
This improves the "inefficient double copy" warning by showing where the source path came from in the source, e.g.
This is implemented by adding position info to path values (actually to all values).
Context