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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 104448e75d ssh-ng: Set log-fd for ssh to 4 by default 
That's expected by `build-remote` and makes sure that errors are
correctly forwarded to the user. For instance, let's say that the
host-key of `example.org` is unknown and

    nix-build ../nixpkgs -A hello -j0 --builders 'ssh-ng://example.org'

is issued, then you get the following output:

    cannot build on 'ssh-ng://example.org?&': error: failed to start SSH connection to 'example.org'
    Failed to find a machine for remote build!
    derivation: yh46gakxq3kchrbihwxvpn5bmadcw90b-hello-2.12.1.drv
    required (system, features): (x86_64-linux, [])
    2 available machines:
    [...]

The relevant information (`Host key verification failed`) ends up in the
daemon's log, but that's not very obvious considering that the daemon
isn't very chatty normally.

This can be fixed - the same way as its done for legacy-ssh - by passing
fd 4 to the SSH wrapper. Now you'd get the following error:

    cannot build on 'ssh-ng://example.org': error: failed to start SSH connection to 'example.org': Host key verification failed.
    Failed to find a machine for remote build!
    [...]

...and now it's clear what's wrong.

Please note that this is won't end up in the derivation's log.

For previous discussion about this change see
https://github.com/NixOS/nix/pull/7659.

Change-Id: I5790856dbf58e53ea3e63238b015ea06c347cf92
2024-04-26 19:04:06 +02:00
.github Add pre-commit checks 2024-03-29 22:57:40 -07:00
bench Add benchmarking scripts 2024-04-08 19:50:24 -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 Merge "build internal API docs with Meson" into main 2024-04-17 21:48:25 +00:00
lix-doc Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
m4 Merge pull request #6258 from obsidiansystems/gcc-bug-ergonomics 2024-03-04 05:24:33 +01:00
maintainers docs: don't compute rl-next.md during build 2024-04-09 02:09:36 +00:00
meson Add pre-commit checks 2024-03-29 22:57:40 -07:00
misc Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
mk Build with traps on signed overflow 2024-03-27 23:54:04 -07:00
nix-support binary tarball: include cacert in root paths 2024-04-12 07:04:37 -06:00
perl Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
scripts meson: correctly differentiate $profiledir and $sysconfdir/profile.d 2024-04-09 02:25:58 -06:00
src ssh-ng: Set log-fd for ssh to 4 by default 2024-04-26 19:04:06 +02:00
tests ssh-ng: Set log-fd for ssh to 4 by default 2024-04-26 19:04:06 +02:00
.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 docs: redo content generation for mdbook and manual 2024-04-11 13:32:06 +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 Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
docker.nix Format Nix code with nixfmt 2024-04-08 13:00:00 -07:00
flake.lock pre-commit: stop using the flake 2024-04-08 15:29:23 -07:00
flake.nix Merge "build internal API docs with Meson" into main 2024-04-17 21:48:25 +00:00
justfile Add a justfile to make meson friendly :) 2024-03-30 03:03:46 +00:00
local.mk build: enable libstdc++ assertions 2024-04-08 15:40:12 -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 meson: correctly embed sandbox shell when asked 2024-04-18 16:15:58 -06:00
meson.options meson: correctly embed sandbox shell when asked 2024-04-18 16:15:58 -06:00
package.nix meson: correctly embed sandbox shell when asked 2024-04-18 16:15:58 -06:00
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 Format Nix code with nixfmt 2024-04-08 13:00:00 -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.