nix-community.nixvim/docs/helpers.md
traxys 6d7e429537
tests: Introduce a way to disable options when running in tests (#1095)
In our basic template we used to provide a check based on
`mkTestDerivationFromNvim`. The issue with this check (that is handled
correctly internally) is that some plugins _can't_ be used in the test
environment, for example image.nvim like in #1085.

This commit introduces a new function to generate such checks,
`mkTestDerivationFromNixvimModule`, that wraps a nixvim configuration
instead of a built nvim instance.

Then a configuration can rely on the newly added
`helpers.enableExceptInTests` attribute to disable parts of the
configuration depending if it is evaluated in tests or in a real final
configuration.

Resolves #1085
2024-02-15 14:27:45 +01:00

1.3 KiB

Helpers

Regardless of the way NixVim is used (as a home-manager module, a nixos module, or as a standalone module), helpers can be included in the same way.

You can simply use:

{
    helpers,
    ...
}: {
    # Your config
}

A certain number of helpers are defined that can be useful:

  • helpers.emptyTable: An empty lua table {} that will be included in the final lua configuration. This is equivalent to {__empty = {};}. This form can allow to do option.__empty = {}.

  • helpers.mkRaw str: Write the string str as raw lua in the final lua configuration. This is equivalent to {__raw = "lua code";}. This form can allow to do option.__raw = "lua code".

  • helpers.toLuaObject obj: Create a string representation of the Nix object. Useful to define your own plugins.

  • helpers.listToUnkeyedAttrs list: Transforms a list to an "unkeyed" attribute set.

    This allows to define mixed table/list in lua:

      (listToUnkeyedAttrs ["a", "b"]) // {foo = "bar";}
    

    Resulting in the following lua:

      {"a", "b", [foo] = "bar"}
    
  • helpers.enableExceptInTests: Evaluates to true, except in mkTestDerivationFromNixvimModule where it evaluates to false. This allows to skip instantiating plugins that can't be run in tests.