This plugin provides "just in time" installation of null-ls sources. This is just a fancy way of saying "sources are not installed until you are ready to use them".
The plugin expects you to provide a specific a list of sources you would like to install based on the current buffer's filetype. If you do not provide this list, initialization will no-op.
I use lazy.nvim, so that is the example I'm adding. I will happily accept pull requests adding more examples.
{
"brandoncc/mason-null-ls-jit-installation.nvim",
dependencies = {
"jay-babu/mason-null-ls.nvim",
},
opts = {
sources = {
"typos",
eslint_d = { "javascript", "javascriptreact", "typescript", "typescriptreact" },
stylua = { "lua" },
},
},
}The plugin has a setup() function which should be called with a list of
sources. Sources can be specified in two ways:
{
sources = {
"typos"
}
}or:
{
sources = {
typos = { "markdown" }
}
}These two methods of specification can be mixed, as seen in the lazy.nvim setup example above.
Sources specified using a simple string will be installed immediately. This is
no different than providing the same source to mason-null-ls's
ensure_installed option.
Sources specified using a table should have the source name as the key and a list of applicable filetypes as the value. When a buffer matching one of the listed filetypes is opened, the source will be installed if it wasn't already.
Mason-based tools provide a setting called ensure_installed, which installs
tooling as soon as neovim is opened. This doesn't solve my problem, which is
that I don't want to install tools until I actually need them. I work on a lot
of development servers that are spun up and thrown away quickly, so installing
a bunch of tools that will not be used is a waste of time. Conversely, removing
my ensure_installed setting causes me to forget to install the tools that I
do need.