readme: major cleanup

Includes the following changes:

- Remove unused reference definition.

- Sort reference definitions.

- Internally reference "Words of warning" section.

- Consistently reference.

- Fix typo.

- Format HTML code.

- Link only to first occurence per section.

- Simplify list formatting.

- Adapt 'Installation' section to manual.

- Fix punctuation.

- Wrap text at 80 characters.

- Simplify link phrasing.

- Add missing punctuation.

PR #4363
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README.md
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Home Manager using Nix
======================
This project provides a basic system for managing a user environment
using the [Nix][] package manager together with the Nix libraries
found in [Nixpkgs][]. It allows declarative configuration of user
specific (non global) packages and dotfiles.
This project provides a basic system for managing a user environment using the
[Nix][] package manager together with the Nix libraries found in [Nixpkgs][]. It
allows declarative configuration of user specific (non-global) packages and
dotfiles.
Usage
-----
Before attempting to use Home Manager please read the warning below.
Before attempting to use Home Manager please read [the warning
below](#words-of-warning).
For a systematic overview of Home Manager and its available options,
please see
For a systematic overview of Home Manager and its available options, please see:
- the [Home Manager manual][manual],
- the [Home Manager configuration options][configuration options], and
- the 3rd party [Home Manager option search](https://mipmip.github.io/home-manager-option-search/).
- [Home Manager manual][manual]
- [Home Manager configuration options][configuration options]
- [3rd party Home Manager option
search](https://mipmip.github.io/home-manager-option-search/)
If you would like to contribute to Home Manager
then please have a look at the [contributing][] chapter of the manual.
If you would like to contribute to Home Manager, then please have a look at
["Contributing" in the manual][contributing].
Releases
--------
Home Manager is developed against `nixpkgs-unstable` branch, which
often causes it to contain tweaks for changes/packages not yet
released in stable NixOS. To avoid breaking users' configurations,
Home Manager is released in branches corresponding to NixOS releases
(e.g. `release-23.05`). These branches get fixes, but usually not new
modules. If you need a module to be backported, then feel free to open
an issue.
Home Manager is developed against `nixpkgs-unstable` branch, which often causes
it to contain tweaks for changes/packages not yet released in stable [NixOS][].
To avoid breaking users' configurations, Home Manager is released in branches
corresponding to NixOS releases (e.g. `release-23.05`). These branches get
fixes, but usually not new modules. If you need a module to be backported, then
feel free to open an issue.
Words of warning
----------------
Unfortunately, it is quite possible to get difficult to understand
errors when working with Home Manager. You should therefore be
comfortable using the Nix language and the various tools in the Nix
ecosystem.
Unfortunately, it is quite possible to get difficult to understand errors when
working with Home Manager. You should therefore be comfortable using the [Nix][]
language and the various tools in the Nix ecosystem.
If you are not very familiar with Nix but still want to use Home
Manager then you are strongly encouraged to start with a small and
very simple configuration and gradually make it more elaborate as you
learn.
If you are not very familiar with Nix but still want to use Home Manager then
you are strongly encouraged to start with a small and very simple configuration
and gradually make it more elaborate as you learn.
In some cases Home Manager cannot detect whether it will overwrite a
previous manual configuration. For example, the Gnome Terminal module
will write to your dconf store and cannot tell whether a configuration
that it is about to be overwritten was from a previous Home Manager
generation or from manual configuration.
In some cases Home Manager cannot detect whether it will overwrite a previous
manual configuration. For example, the Gnome Terminal module will write to your
dconf store and cannot tell whether a configuration that it is about to be
overwritten was from a previous Home Manager generation or from manual
configuration.
Home Manager targets [NixOS][] unstable and NixOS version 23.05 (the
current stable version), it may or may not work on other Linux
distributions and NixOS versions.
Home Manager targets [NixOS][] unstable and NixOS version 23.05 (the current
stable version), it may or may not work on other Linux distributions and NixOS
versions.
Also, the `home-manager` tool does not explicitly support rollbacks at
the moment so if your home directory gets messed up you'll have to fix
it yourself. See the [rollbacks][] section for instructions on how to
manually perform a rollback.
Also, the `home-manager` tool does not explicitly support rollbacks at the
moment so if your home directory gets messed up you'll have to fix it yourself.
See the [rollbacks][] section for instructions on how to manually perform a
rollback.
Now when your expectations have been built up and you are eager to try
all this out you can go ahead and read the rest of this text.
Now when your expectations have been built up and you are eager to try all this
out you can go ahead and read the rest of this text.
Contact
-------
You can chat with us on IRC in the channel [#home-manager][] on [OFTC][].
There is also a [Matrix room](https://matrix.to/#/#hm:rycee.net),
which is bridged to the IRC channel.
You can chat with us on IRC in the channel [#home-manager][] on [OFTC][]. There
is also a [Matrix room](https://matrix.to/#/#hm:rycee.net), which is bridged to
the IRC channel.
Installation
------------
Home Manager can be used in three primary ways:
1. Using the standalone `home-manager` tool. For platforms other than
NixOS and Darwin, this is the only available choice. It is also
recommended for people on NixOS or Darwin that want to manage their
home directory independently of the system as a whole. See
[Standalone installation][manual standalone install] in the manual
for instructions on how to perform this installation.
1. Using the standalone `home-manager` tool. For platforms other than NixOS and
Darwin, this is the only available choice. It is also recommended for people
on [NixOS][] or Darwin that want to manage their home directory independently
of the system as a whole. See ["Standalone installation" in the
manual][manual standalone install] for instructions on how to perform this
installation.
2. As a module within a NixOS system configuration. This allows the
user profiles to be built together with the system when running
`nixos-rebuild`. See [NixOS module installation][manual nixos
install] in the manual for a description of this setup.
1. As a module within a NixOS system configuration. This allows the user
profiles to be built together with the system when running `nixos-rebuild`.
See ["NixOS module" in the manual][manual nixos install] for a description of
this setup.
3. As a module within a [nix-darwin][] system configuration. This
allows the user profiles to be built together with the system when
running `darwin-rebuild`. See [nix-darwin module
installation][manual nix-darwin install] in the manual for a
1. As a module within a [nix-darwin] system configuration. This allows the user
profiles to be built together with the system when running `darwin-rebuild`.
See ["nix-darwin module" in the manual][manual nix-darwin install] for a
description of this setup.
Home Manager provides both the channel-based setup and the flake-based one.
See [Nix Flakes][manual nix flakes] for a description of the flake-based setup.
Home Manager provides both the channel-based setup and the flake-based one. See
[Nix Flakes][manual nix flakes] for a description of the flake-based setup.
Translations
------------
Home Manager has basic support for internationalization through
[gettext](https://www.gnu.org/software/gettext/). The translations are
hosted by [Weblate](https://weblate.org/). If you would like to
contribute to the translation effort then start by going to the
[Home Manager Weblate project](https://hosted.weblate.org/engage/home-manager/).
[gettext](https://www.gnu.org/software/gettext/). The translations are hosted by
[Weblate](https://weblate.org/). If you would like to contribute to the
translation effort then start by going to the [Home Manager Weblate
project](https://hosted.weblate.org/engage/home-manager/).
<a href="https://hosted.weblate.org/engage/home-manager/">
<img src="https://hosted.weblate.org/widgets/home-manager/-/multi-auto.svg" alt="Translation status" />
<img src="https://hosted.weblate.org/widgets/home-manager/-/multi-auto.svg" alt="Translation status" />
</a>
License
@ -114,19 +111,18 @@ License
This project is licensed under the terms of the [MIT license](LICENSE).
[Nix]: https://nixos.org/explore.html
[NixOS]: https://nixos.org/
[Nixpkgs]: https://github.com/NixOS/nixpkgs
[manual]: https://nix-community.github.io/home-manager/index.html
[contributing]: https://nix-community.github.io/home-manager/#ch-contributing
[manual usage]: https://nix-community.github.io/home-manager/#ch-usage
[configuration options]: https://nix-community.github.io/home-manager/options.html
[#home-manager]: https://webchat.oftc.net/?channels=home-manager
[OFTC]: https://oftc.net/
[Nix Flakes]: https://nixos.wiki/wiki/Flakes
[nix-darwin]: https://github.com/LnL7/nix-darwin
[manual standalone install]: https://nix-community.github.io/home-manager/index.html#sec-install-standalone
[manual nixos install]: https://nix-community.github.io/home-manager/index.html#sec-install-nixos-module
[manual nix-darwin install]: https://nix-community.github.io/home-manager/index.html#sec-install-nix-darwin-module
[NixOS]: https://nixos.org/
[Nix]: https://nixos.org/explore.html
[Nixpkgs]: https://github.com/NixOS/nixpkgs
[OFTC]: https://oftc.net/
[configuration options]: https://nix-community.github.io/home-manager/options.html
[contributing]: https://nix-community.github.io/home-manager/#ch-contributing
[manual nix flakes]: https://nix-community.github.io/home-manager/index.html#ch-nix-flakes
[manual nix-darwin install]: https://nix-community.github.io/home-manager/index.html#sec-install-nix-darwin-module
[manual nixos install]: https://nix-community.github.io/home-manager/index.html#sec-install-nixos-module
[manual standalone install]: https://nix-community.github.io/home-manager/index.html#sec-install-standalone
[manual]: https://nix-community.github.io/home-manager/index.html
[nix-darwin]: https://github.com/LnL7/nix-darwin
[rollbacks]: https://nix-community.github.io/home-manager/index.html#sec-usage-rollbacks