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A modern, delicious implementation of the Nix package manager, focused on correctness, usability, and growth — and committed to doing right by its community
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Maximilian Bosch 2b02ce0e48
libexpr: throw a more helpful eval-error if a builtin is not available due to a missing feature-flag 
I found it somewhat confusing to have an error like

    error: attribute 'getFlake' missing

if the required experimental-feature (`flakes`) is not enabled. Instead,
I'd expect Nix to throw an error just like it's the case when using e.g. `nix
flake` without `flakes` being enabled.

With this change, the error looks like this:

    $ nix-instantiate -E 'builtins.getFlake "nixpkgs"'
    error: Cannot call 'builtins.getFlake' because experimental Nix feature 'flakes' is disabled. You can enable it via '--extra-experimental-features flakes'.

           at «string»:1:1:

                1| builtins.getFlake "nixpkgs"
                 | ^

I didn't use `settings.requireExperimentalFeature` here on purpose
because this doesn't contain a position. Also, it doesn't seem as if we
need to catch the error and check for the missing feature here since
this already happens at evaluation time.
2021-09-29 11:57:15 +02:00
.github Bump cachix/install-nix-action from 13 to 14 2021-09-14 12:57:56 +00:00
config
contrib
doc/manual Quiet 2021-09-22 14:12:31 +02:00
m4
maintainers
misc
mk mk: prefert inplace library paths to system ones 2021-08-28 13:51:10 +01:00
nix-rust
perl Expose a perl method to query a derivation 2021-07-30 11:55:14 +02:00
scripts fix install on macOS monterey 2021-09-21 13:38:29 -05:00
src libexpr: throw a more helpful eval-error if a builtin is not available due to a missing feature-flag 2021-09-29 11:57:15 +02:00
tests Revert "Merge pull request #4922 from nrdxp/default-submodules" 2021-09-22 17:25:25 +02:00
.dir-locals.el
.editorconfig
.gitignore Merge pull request #5111 from Pamplemousse/clean 2021-08-09 20:05:03 +02:00
.version
boehmgc-coroutine-sp-fallback.diff
bootstrap.sh
configure.ac configure: explicit dependency on lowdown library 2021-09-14 07:54:37 +02:00
COPYING
default.nix
flake.lock flake.lock: Update 2021-09-13 14:45:21 +02:00
flake.nix flake: Use the real nixUnstable from nixpkgs 2021-09-20 14:37:09 +02:00
local.mk
Makefile
Makefile.config.in
precompiled-headers.h
README.md
shell.nix

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 build nix from source with nix-build or how to get a development environment.

Additional Resources

License

Nix is released under the LGPL v2.1.