mirror of
https://github.com/NixOS/nix
synced 2024-09-20 11:11:03 -04:00
105 lines
2.7 KiB
Markdown
105 lines
2.7 KiB
Markdown
nix-repl
|
||
========
|
||
|
||
`nix-repl` is a simple read–eval–print loop (REPL) for the Nix package
|
||
manager.
|
||
|
||
Installation
|
||
------------
|
||
|
||
Assuming you have Nix installed, just do
|
||
|
||
$ git clone https://github.com/edolstra/nix-repl.git
|
||
$ cd nix-repl
|
||
$ nix-env -f . -i nix-repl
|
||
|
||
Example
|
||
-------
|
||
|
||
Here is a typical `nix-repl` session:
|
||
|
||
$ nix-repl
|
||
Welcome to Nix version 1.6pre3215_2c1ecf8. Type :? for help.
|
||
|
||
nix-repl> 3 * 4
|
||
12
|
||
|
||
nix-repl> :l <nixpkgs>
|
||
Added 3337 variables.
|
||
|
||
nix-repl> lib.range 1 5
|
||
[ 1 2 3 4 5 ]
|
||
|
||
nix-repl> :a lib
|
||
Added 299 variables.
|
||
|
||
nix-repl> range 1 5
|
||
[ 1 2 3 4 5 ]
|
||
|
||
nix-repl> xs = range 1 5
|
||
|
||
nix-repl> map (x: x * x) xs
|
||
[ 1 4 9 16 25 ]
|
||
|
||
nix-repl> :l <nixos>
|
||
Added 7 variables.
|
||
|
||
nix-repl> config.services.dhcpd
|
||
{ configFile = null; enable = false; extraConfig = ""; interfaces = [ ... ]; machines = [ ... ]; }
|
||
|
||
nix-repl> :p config.services.dhcpd
|
||
{ configFile = null; enable = false; extraConfig = ""; interfaces = [ "eth0" ]; machines = [ ]; }
|
||
|
||
nix-repl> config.fileSystems
|
||
{ "/" = { ... }; "/boot" = { ... }; }
|
||
|
||
nix-repl> mapAttrsToList (n: v: v.device) config.fileSystems
|
||
[ "/dev/disk/by-label/nixos" "/dev/disk/by-label/boot" ]
|
||
|
||
nix-repl> :b libjson
|
||
these derivations will be built:
|
||
/nix/store/h910xqb36pysxcxkayb1zkr1zcvvk1zy-libjson_7.6.1.zip.drv
|
||
/nix/store/iv0rdx08di0fg704zyxklkvdz6i96lm8-libjson-7.6.1.drv
|
||
...
|
||
this derivation produced the following outputs:
|
||
out -> /nix/store/ys6bvgfia81rjwqxjlgkwnx6jhsml8h9-libjson-7.6.1
|
||
|
||
nix-repl> :t makeFontsConf
|
||
a function
|
||
|
||
nix-repl> :b makeFontsConf { fontDirectories = [ "${freefont_ttf}/share/fonts/truetype" ]; }
|
||
...
|
||
this derivation produced the following outputs:
|
||
out -> /nix/store/jkw848xj0gkbhmvxi0hwpnhzn2716v3c-fonts.conf
|
||
|
||
nix-repl> :s pan
|
||
# Builds dependencies of the ‘pan’ derivation, then starts a shell
|
||
# in which the environment variables of the derivation are set
|
||
|
||
[nix-shell:/tmp/nix-repl]$ echo $src
|
||
/nix/store/0ibx15r02nnkwiclmfbpzrzjm2y204fh-pan-0.139.tar.bz2
|
||
|
||
[nix-shell:/tmp/nix-repl]$ exit
|
||
|
||
nix-repl>
|
||
|
||
Tab completion works on variables in scope and on attribute sets. For
|
||
example:
|
||
|
||
$ nix-repl '<nixpkgs>' '<nixos>'
|
||
Welcome to Nix version 1.6pre3215_2c1ecf8. Type :? for help.
|
||
|
||
nix-repl> thunder<TAB> => thunderbird
|
||
|
||
nix-repl> <TAB>
|
||
Display all 3634 possibilities? (y or n)
|
||
|
||
nix-repl> lib<TAB>
|
||
Display all 291 possibilities? (y or n)
|
||
|
||
nix-repl> xorg.libX<TAB>
|
||
xorg.libXdamage xorg.libXdmcp
|
||
|
||
nix-repl> config.networking.use<TAB>
|
||
config.networking.useDHCP config.networking.usePredictableInterfaceNames
|