Commit 788fee2a authored by Gongqi Huang's avatar Gongqi Huang
Browse files

doc/languages-frameworks/typst: Format Nix expressions

parent 3c24ed2f

doc/languages-frameworks/typst.section.md

+29 −18
Original line number Diff line number Diff line
@@ -7,10 +7,12 @@ Typst can be configured to include packages from [Typst Universe](https://typst. 
You can create a custom Typst environment with a selected set of packages from **Typst Universe** using the following code. It is also possible to specify a Typst package with a specific version (e.g., `cetz_0_3_0`). A package without a version number will always refer to its latest version.



```nix

typst.withPackages (p: with p; [

typst.withPackages (

  p: with p; [

    polylux_0_4_0

    cetz_0_3_0

])

  ]

)

```



### Handling Outdated Package Hashes {#typst-handling-outdated-package-hashes}
@@ -18,18 +20,24 @@ typst.withPackages (p: with p; [ 
Since **Typst Universe** does not provide a way to fetch a package with a specific hash, the package hashes in `nixpkgs` can sometimes be outdated. To resolve this issue, you can manually override the package source using the following approach:



```nix

typst.withPackages.override (old: {

  typstPackages = old.typstPackages.extend (_: previous: {

typst.withPackages.override

  (old: {

    typstPackages = old.typstPackages.extend (

      _: previous: {

        polylux_0_4_0 = previous.polylux_0_4_0.overrideAttrs (oldPolylux: {

          src = oldPolylux.src.overrideAttrs {

            outputHash = YourUpToDatePolyluxHash;

          };

        });

  });

}) (p: with p; [

      }

    );

  })

  (

    p: with p; [

      polylux_0_4_0

      cetz_0_3_0

])

    ]

  )

```



## Custom Packages {#typst-custom-packages}
@@ -39,12 +47,15 @@ typst.withPackages.override (old: { 
Here's how to define a custom Typst package:



```nix

{ buildTypstPackage, typstPackages, fetchzip }:

{

  buildTypstPackage,

  typstPackages,

}:



buildTypstPackage (finalAttrs: {

  pname = "my-typst-package";

  version = "0.0.1";

  src = fetchzip { ... };

  src = ./.;

  typstDeps = with typstPackages; [ cetz_0_3_0 ];

})

```