Display only in specific language(s)

[mbalazy]

Hi,
Can I display lines in some specific languages?
I want it only in .yaml files.

[lukas-reineke]

Yes, you can add the filetype argument to the setup call.
:help g:indent_blankline_filetype

require("indent_blankline").setup {
    filetype = { "yaml" },
    -- ... rest of your options ...
}

[zer09]

Is this option still valid on v3? To only include some filetypes

Thanks

[lukas-reineke]

Yes, :help ibl.config.exclude.filestypes

[zer09]

I think that will exclude the filetype. I am looking the option to only include certain filetype.
This the previous option

g:indent_blankline_filetype                      *g:indent_blankline_filetype*

    Specifies a list of |filetype| values for which this plugin is enabled.
    All |filetypes| are enabled if the value is an empty list.

    Also set by |g:indentLine_fileType|

    Default: []                                                               

    Example:  

        let g:indent_blankline_filetype = ['vim']

If Im correct I will exclude a bunch of filetype, rather than to include a few?
I have this config for v2.

return {
	{
		"lukas-reineke/indent-blankline.nvim",
		opts = {
			filetype = { "html", "yaml", "svelte" },
			show_current_context = true,
		},
	},
}

[lukas-reineke]

Ah sorry, I didn't read the question properly.
There is no option for this anymore, but you can make a simple hook to achieve the same.

local hooks = require "ibl.hooks"
hooks.register(hooks.type.ACTIVE, function(bufnr)
    return vim.tbl_contains(
        { "yaml", "html", "svelte" },
        vim.api.nvim_get_option_value("filetype", { buf = bufnr })
    )
end)

[zer09]

I'm sorry to bother you, I tried to register the hooks inside config and init on lazy.nvim, it looks like it doesn't register.
This is my config

return {
	{
		"lukas-reineke/indent-blankline.nvim",
		main = "ibl",
		opts = {},
		config = function()
			local hooks = require("ibl.hooks")
			hooks.register(hooks.type.ACTIVE, function(bufnr)
				local c = vim.tbl_contains(
					{ "html", "yaml", "svelte" },
					vim.api.nvim_get_option_value("filetype", { buf = bufnr })
				)

				print(vim.inspect(c)) // inspection doesnt show anything

				return c
			end)
		end,
	},
}

It only work if I have this, but it will apply to all filetypes

return {
	{
		"lukas-reineke/indent-blankline.nvim",
		main = "ibl",
		opts = {},
	},
}

[lukas-reineke]

If you have a config or init function, lazy will not automatically call setup.
You have to do it yourself

return {
    "lukas-reineke/indent-blankline.nvim",
    main = "ibl",
    config = function()
        require("ibl").setup {}
        local hooks = require("ibl.hooks")
        hooks.register(hooks.type.ACTIVE, function(bufnr)
             return vim.tbl_contains(
                { "html", "yaml", "svelte" },
                vim.api.nvim_get_option_value("filetype", { buf = bufnr })
            )
        end)
    end,
}

[zer09]

I mean i tried to put on init and config to test it.

I tried the code you give above with the same result,

[lukas-reineke]

That code is correct, it works for me.
If it doesn't for you, there is something else wrong with your config.