Mirrors/nix-pills
2
0
Fork 0
mirror of https://github.com/NixOS/nix-pills synced 2024-11-10 05:44:14 +00:00
Code Issues Projects Releases Packages Wiki Activity

Update the description of simple.nix in pill 7.7

Browse source 
Solve the discrepancy between the code and its description
This commit is contained in:
MathiasMalandain 2023-10-17 11:27:58 +02:00 committed by GitHub
parent b54b78be80
commit cefdfa8ee1
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 13 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
pills/07-working-derivation.xml
View file

@ -285,11 +285,10 @@
Finally, it creates the symlink.
</para>
<para>
In the first line of <filename>simple.nix</filename>, we have an
<function>import</function> function call nested in a <code>with</code>
statement. Recall that <function>import</function> accepts one argument, a
nix file to load. In this case, the contents of the file evaluated to a
function.
In the second line of <filename>simple.nix</filename>, we have an
<function>import</function> function call. Recall that <function>import</function>
accepts one argument, a nix file to load. In this case, the contents of
the file evaluate to a function.
</para>
<para>
Afterwards, we call the function with the empty set. We saw this already
@ -299,12 +298,15 @@
clearer.
</para>
<para>
The value returned by the nixpkgs function is a set. More specifically,
it's a set of derivations. Using the <code>with</code> expression we bring
them into scope. This is equivalent to the <command>:l &lt;nixpkgs&gt;</command>
we used in <application>nix repl</application>; it allows us to easily access derivations
such as <varname>bash</varname>, <varname>gcc</varname>, and
<varname>coreutils</varname>.
The value returned by the nixpkgs function is a set; more specifically,
it's a set of derivations. Calling <code>import &lt;nixpkgs> {}</code>
into a <function>let</function>-expression creates the local variable
<varname>pkgs</varname> and brings it into scope. This has an effect similar to
the <command>:l &lt;nixpkgs&gt;</command> we used in <application>nix repl</application>,
in that it allows us to easily access derivations such as <varname>bash</varname>,
<varname>gcc</varname>, and <varname>coreutils</varname>, but those derivations
will have to be explicitly referred to as members of the <varname>pkgs</varname> set
(e.g., <varname>pkgs.bash</varname> instead of just <varname>bash</varname>).
</para>
<para>
Below is a revised version of the <filename>simple.nix</filename> file, using the <code>inherit</code> keyword: