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in attribute set pattern matches. This allows defining a function that takes *at least* the listed attributes, while ignoring additional attributes. For instance, {stdenv, fetchurl, fuse, ...}: stdenv.mkDerivation { ... }; defines a function that requires an attribute set that contains the specified attributes but ignores others. The main advantage is that we can then write in all-packages.nix aefs = import ../bla/aefs pkgs; instead of aefs = import ../bla/aefs { inherit stdenv fetchurl fuse; }; This saves a lot of typing (not to mention not having to update all-packages.nix with purely mechanical changes). It saves as much typing as the "args: with args;" style, but has the advantage that the function arguments are properly declared (not implicit in what the body of the "with" uses). |
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.. | ||
bin2c | ||
boost | ||
bsdiff-4.3 | ||
libexpr | ||
libmain | ||
libstore | ||
libutil | ||
nix-env | ||
nix-hash | ||
nix-instantiate | ||
nix-log2xml | ||
nix-setuid-helper | ||
nix-store | ||
nix-worker | ||
aterm-helper.pl | ||
Makefile.am |