56de2bcd43
https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948 this can do it nicely. Signed-off-by: Anton Arapov <anton@deadbeef.mx>
4 lines
143 B
Nix
4 lines
143 B
Nix
# TODO: remove this file. There is lib.maybeEnv now
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name: default:
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let value = builtins.getEnv name; in
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if value == "" then default else value
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