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Rebecca Turner 727b43478c Add repl-overlays 
Adds a `repl-overlays` option, which specifies files that can overlay
and modify the top-level bindings in `nix repl`. For example, with the
following contents in `~/.config/nix/repl.nix`:

    info: final: prev: let
      optionalAttrs = predicate: attrs:
        if predicate
        then attrs
        else {};
    in
      optionalAttrs (prev ? legacyPackages && prev.legacyPackages ? ${info.currentSystem})
      {
        pkgs = prev.legacyPackages.${info.currentSystem};
      }

We can run `nix repl` and use `pkgs` to refer to `legacyPackages.${currentSystem}`:

    $ nix repl --repl-overlays ~/.config/nix/repl.nix nixpkgs
    Lix 2.90.0
    Type :? for help.
    Loading installable 'flake:nixpkgs#'...
    Added 5 variables.
    Loading 'repl-overlays'...
    Added 6 variables.
    nix-repl> pkgs.bash
    «derivation /nix/store/g08b5vkwwh0j8ic9rkmd8mpj878rk62z-bash-5.2p26.drv»

Change-Id: Ic12e0f2f210b2f46e920c33088dfe1083f42391a
2024-04-08 17:11:47 -07:00
.github Add pre-commit checks 2024-03-29 22:57:40 -07:00
clang-tidy Create clang-tidy check to rename all our includes 2024-04-06 04:40:19 +00:00
contrib function-trace: always show the trace 2019-09-18 23:23:21 +02:00
doc Add repl-overlays 2024-04-08 17:11:47 -07:00
lix-doc nix-doc -> lix-doc, make self-contained in package.nix 2024-04-08 04:05:13 +00:00
m4 Merge pull request #6258 from obsidiansystems/gcc-bug-ergonomics 2024-03-04 05:24:33 +01:00
maintainers repl: improve :doc builtin repl command to support lambdas. 2024-04-03 13:47:22 -06:00
meson Add pre-commit checks 2024-03-29 22:57:40 -07:00
misc Add pre-commit checks 2024-03-29 22:57:40 -07:00
mk Build with traps on signed overflow 2024-03-27 23:54:04 -07:00
perl meson: implement perl bindings 2024-04-02 11:22:42 -06:00
scripts meson: install shell files 2024-03-29 20:10:33 +00:00
src Add repl-overlays 2024-04-08 17:11:47 -07:00
tests Add repl-overlays 2024-04-08 17:11:47 -07:00
.clang-format Add pre-commit checks 2024-03-29 22:57:40 -07:00
.clang-tidy Add basic clang-tidy config 2024-03-29 20:26:38 -07:00
.dir-locals.el .dir-locals.el: Set c-block-comment-prefix 2020-07-10 11:21:06 +02:00
.editorconfig Add .editorconfig 2017-06-05 22:57:28 +01:00
.envrc Set MAKEFLAGS=-j and GTEST_BRIEF in .envrc 2024-03-28 18:17:28 -07:00
.gitignore Merge "Delete autoconf generated code from tree" into main 2024-04-01 17:34:29 +00:00
.version Update version to 2.90.0 2024-03-07 19:57:39 -07:00
boehmgc-coroutine-sp-fallback.diff Add pre-commit checks 2024-03-29 22:57:40 -07:00
boehmgc-traceable_allocator-public.diff Add pre-commit checks 2024-03-29 22:57:40 -07:00
configure.ac Stop vendoring toml11 2024-03-27 21:04:00 -04:00
CONTRIBUTING.md Put functional tests in tests/functional 2023-12-01 12:06:43 -05:00
COPYING Add pre-commit checks 2024-03-29 22:57:40 -07:00
default.nix add flake-compat to flake.nix and use sha256 in default.nix 2023-03-06 21:11:24 +01:00
docker.nix fix "add an option to include flake-registry..." 2023-05-16 14:35:31 +02:00
flake.lock Use upstream cachix/git-hooks.nix for pre-commit 2024-04-01 10:38:50 -07:00
flake.nix nix-doc -> lix-doc, make self-contained in package.nix 2024-04-08 04:05:13 +00:00
justfile Add a justfile to make meson friendly :) 2024-03-30 03:03:46 +00:00
local.mk Build with traps on signed overflow 2024-03-27 23:54:04 -07:00
Makefile un-ups your start 2024-03-18 18:28:08 -07:00
Makefile.config.in nix-doc -> lix-doc, make self-contained in package.nix 2024-04-08 04:05:13 +00:00
meson.build nix-doc -> lix-doc, make self-contained in package.nix 2024-04-08 04:05:13 +00:00
meson.options meson: add switch to disable docs 2024-04-01 20:15:28 +00:00
package.nix nix-doc -> lix-doc, make self-contained in package.nix 2024-04-08 04:05:13 +00:00
precompiled-headers.h Config: Use nlohmann/json 2020-08-20 11:02:16 +02:00
README.md Improve hacking.md 2023-02-13 12:00:00 +04:00
shell.nix Remove url literals 2022-01-24 13:28:21 +01:00
treefmt.toml Add treefmt pre-commit hook 2024-03-29 22:57:43 -07:00

README.md

Nix

Open Collective supporters Test

Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.

Installation

On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):

$ curl -L https://nixos.org/nix/install | sh

Information on additional installation methods is available on the Nix download page.

Building And Developing

See our Hacking guide in our manual for instruction on how to to set up a development environment and build Nix from source.

Additional Resources

License

Nix is released under the LGPL v2.1.