checkstyle config

[sangramsingha]

Hi,

I'm new to neovim and trying to config null-ls for java linting.
Below config works but it's very slow on large projects as it goes through the whole project source.
I was trying to pass in the current buffer absolute path but could not.

Null-ls log

[DEBUG ] ...t/null-ls.nvim/lua/null-ls/helpers/generator_factory.lua:320: spawning command "checkstyle" at /foo/bar with args { "-f", "sarif", "-c", "/google_checks.xml", "" }

Null-ls config

local java_project_path = vim.fn.fnamemodify(vim.fn.getcwd(), ":p:h")

...
diagnostics.checkstyle.with({
    timeout = 20000,
    filetypes = {"java"},
    args = {
        "-f", "sarif",
        "-c" , "/google_checks.xml",
        -- vim.fn.expand "%:P"  --doesn't work
        -- vim.api.nvim_buf_get_name(0) -- neither this
        -- java_project_path .. "/src/main/java/" -- this work but its too slow on projects with lot of java files
    }
})

is there a way to pass single file path from the current buffer to null-ls checkstyle.
Any help is appreciated.

[jose-elias-alvarez]

The issue with your first two approaches is that you are passing in the path to the buffer when Neovim is opened, not when the source actually runs. This may work:

diagnostics.checkstyle.with({
    timeout = 20000,
    filetypes = { "java" },
    args = function(params)
        return {
            "-f",
            "sarif",
            "-c",
            "/google_checks.xml",
            params.bufname,
        }
    end,
})

[sangramsingha]

Thanks :-)