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README: improve development docs

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25
README.md
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@ -12,7 +12,7 @@ for more details.
On Linux and macOS the easiest way to Install Nix is to run the following shell command On Linux and macOS the easiest way to Install Nix is to run the following shell command
(as a user other than root): (as a user other than root):
``` ```console
$ curl -L https://nixos.org/nix/install | sh $ curl -L https://nixos.org/nix/install | sh
``` ```
@ -20,27 +20,8 @@ Information on additional installation methods is available on the [Nix download
## Building And Developing ## Building And Developing
### Building Nix See our [Hacking guide](hydra.nixos.org/job/nix/master/build.x86_64-linux/latest/download-by-type/doc/manual#chap-hacking) in our manual for instruction on how to
build nix from source with nix-build or how to get a development environment.
You can build Nix using one of the targets provided by [release.nix](./release.nix):
```
$ nix-build ./release.nix -A build.aarch64-linux
$ nix-build ./release.nix -A build.x86_64-darwin
$ nix-build ./release.nix -A build.i686-linux
$ nix-build ./release.nix -A build.x86_64-linux
```
### Development Environment
You can use the provided `shell.nix` to get a working development environment:
```
$ nix-shell
$ ./bootstrap.sh
$ ./configure
$ make
```
## Additional Resources ## Additional Resources

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doc/manual/hacking.xml
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@ -4,18 +4,37 @@
<title>Hacking</title> <title>Hacking</title>
<para>This section provides some notes on how to hack on Nix. To get <para>This section provides some notes on how to hack on Nix. To get
the latest version of Nix from GitHub: the latest version of Nix from GitHub:
<screen> <screen>
$ git clone git://github.com/NixOS/nix.git $ git clone https://github.com/NixOS/nix.git
$ cd nix $ cd nix
</screen> </screen>
</para> </para>
<para>To build it and its dependencies: <para>To build Nix for the current operating system/architecture use</para>
<screen> <screen>
$ nix-build release.nix -A build.x86_64-linux $ nix-build
</screen> </screen>
or if you have a flakes-enabled nix:
<screen>
$ nix build
</screen>
This will build <literal>defaultPackage</literal> attribute defined in the <literal>flake.nix</literal> file.
To build for other platforms add one of the following suffixes to it: aarch64-linux,
i686-linux, x86_64-darwin, x86_64-linux.
i.e.
<screen>
nix-build -A defaultPackage.x86_64-linux
</screen>
</para> </para>
<para>To build all dependencies and start a shell in which all <para>To build all dependencies and start a shell in which all
@ -27,13 +46,27 @@ $ nix-shell
To build Nix itself in this shell: To build Nix itself in this shell:
<screen> <screen>
[nix-shell]$ ./bootstrap.sh [nix-shell]$ ./bootstrap.sh
[nix-shell]$ configurePhase [nix-shell]$ ./configure $configureFlags
[nix-shell]$ make [nix-shell]$ make -j $NIX_BUILD_CORES
</screen> </screen>
To install it in <literal>$(pwd)/inst</literal> and test it: To install it in <literal>$(pwd)/inst</literal> and test it:
<screen> <screen>
[nix-shell]$ make install [nix-shell]$ make install
[nix-shell]$ make installcheck [nix-shell]$ make installcheck
[nix-shell]$ ./inst/bin/nix --version
nix (Nix) 2.4
</screen>
If you have a flakes-enabled nix you can replace:
<screen>
$ nix-shell
</screen>
by:
<screen>
$ nix develop
</screen> </screen>
</para> </para>