fileset.fileFilter: Don't run predicate unnecessarily
#267381
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Before:
nix-repl> fileset.trace (fileset.fileFilter (file: builtins.trace file.name false) ./default.nix)
trace: README.md
trace: benchmark.sh
trace: default.nix
trace: internal.nix
trace: mock-splitRoot.nix
trace: tests.sh
After:
nix-repl> fileset.trace (fileset.fileFilter (file: builtins.trace file.name false) ./default.nix)
trace: default.nix
ofborg
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added
10.rebuild-darwin: 0
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Description of changes
Before:
After:
Note that even if the filter returned true before, the files weren't added to the store, so this is just a performance and laziness improvement and arguably not a bug fix.
This work is sponsored by Antithesis ✨
Things done