Various nix and NixOS extensions
The output ak-nix#repl holds convenience functions for use in a Nix REPL.
The highlights are ls which behaves like your shell's ls command, pwd
which does exactly what you think, and show which uses builtins.trace to
print values or lists of values to the console.
nix-repl> :a ( builtins.getFlake "ak-nix" ).repl
nix-repl> pwd
/home/sally/src/ak-nix
nix-repl> ls "./*"
trace:
./attrsets.nix
./debug.nix
./default.nix
./filesystem.nix
./json.nix
./lists.nix
./paths.nix
./repl.nix
./stdenv.nix
./strings.nix
true
nix-repl> show ["oh" "dip" ( it: "is" ) 420]
trace:
oh
dip
<LAMBDA>
420
trueA set of extensions to nixpkgs.lib.
This is constructed using nixpkgs.lib.extend, so it can be used as an
alternate in existing expressions which already take lib as an argument.
The lib attribute contains librepl and is available as at the top-level, or
as a subdir flake:
nix-repl> lib = builtins.getFlake "github:aakropotkin/ak-nix?dir=lib"
nix-repl> :a lib.librepl
nix-repl> pwd
/home/sally/src/ak-nix
nix-repl> add = curryDefaultSystems' ( system:
{ x, y }: builtins.trace system ( x + y ) )
nix-repl> add { x = 1; y = 2; }
{ __functor = <lambda>;
aarch64-darwin = 3; trace: aarch64-darwin
aarch64-linux = 3; trace: aarch64-linux
i686-linux = 3; trace: i686-linux
x86_64-darwin = 3; trace: x86_64-darwin
x86_64-linux = 3; trace: x86_64-linux
}
nix-repl> ( add { x = 2; y = 2; } ).x86_64-linux
3
nix-repl> ( add { x = 3; y = 2; } ) "x86_64-linux"
trace: x86_64-linux
5
nix-repl> add "x86_64-linux" { x = 4; y = 20; }
trace: x86_64-linux
24