dotfiles/.config/nvim/lua/my/lsp.lua

require('my/plugins')
require('my/completion')

local map = require('my.functions').map

-- only do this after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
    ---@format disable
    map('n', '<f5>',        vim.diagnostic.goto_prev, nil, bufnr)
    map('n', '<f6>',        vim.diagnostic.goto_next, nil, bufnr)
    map('n', 'gD',          vim.lsp.buf.declaration, 'Go to declaration', bufnr)
    map('n', 'gd',          vim.lsp.buf.definition, 'Go to definition', bufnr)
    map('n', '<M-.>',       vim.lsp.buf.definition, 'Go to definition', bufnr)
    map('n', 'gi',          vim.lsp.buf.implementation, 'Go to implementation',
        bufnr)
    map('n', 'gr',          vim.lsp.buf.references, 'Show references', bufnr)
    map('n', 'K',           vim.lsp.buf.hover, 'Hover', bufnr)
    map('i', '<C-K>',       vim.lsp.buf.hover, 'Hover', bufnr)
    map('n', '<Leader>lwa', vim.lsp.buf.add_workspace_folder,
        'Add workspace folder', bufnr)
    map('n', '<Leader>lwr', vim.lsp.buf.remove_workspace_folder,
        'Remove workspace folder', bufnr)
    map('n', '<Leader>lwl', function()
        print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
    end, 'List workspace folders', bufnr)
    map('n', '<Leader>lr',  vim.lsp.buf.rename, 'Rename symbol', bufnr)
    map('n', '<Leader>la',  vim.lsp.buf.code_action, 'Code action', bufnr)
    map('n', '<Leader>lf',  vim.lsp.buf.formatting, 'Format buffer', bufnr)

    -- highlight symbol under cursor
    if client.resolved_capabilities.document_highlight then
        vim.api.nvim_create_augroup('config_lsp', { clear = false })
        vim.api.nvim_clear_autocmds({
            buffer = bufnr,
            group = 'config_lsp',
        })
        vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
            group = 'config_lsp',
            buffer = bufnr,
            callback = vim.lsp.buf.document_highlight,
        })
        vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI' }, {
            group = 'config_lsp',
            buffer = bufnr,
            callback = vim.lsp.buf.clear_references,
        })

        -- Don't autoformat code like text
        vim.bo.formatoptions = vim.o.formatoptions:gsub('t', '')
        -- Let LSP autoformat on save
        require('lsp-format').on_attach(client)

        -- virtual text hint for parameters
        require ('lsp_signature').on_attach({
            bind = true,
            handler_opts = {
                border = 'rounded'
            },
            floating_window = false
        }, bufnr)
    end

    -- -- show help on hover
    -- if client.resolved_capabilities.hover then
    --     vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
    --         group = 'config_lsp',
    --         buffer = bufnr,
    --         callback = vim.lsp.buf.hover
    --     })
    -- end
end

-- update client capabilities with completion plugin stuff
local capabilities = require('cmp_nvim_lsp').update_capabilities(
    vim.lsp.protocol.make_client_capabilities())

vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
    vim.lsp.handlers.hover, {
    border = 'rounded',
    width = 60,
    focusable = false
})

-- setup servers
local lspconfig = require('lspconfig')

if vim.fn.executable('clangd') > 0 then
    lspconfig.clangd.setup {
        cmd = {
            'clangd',
            '--compile-commands-dir=build',
            '--clang-tidy', -- needs >=clangd-9
            '--ranking-model=decision_forest' -- needs >=clangd-12
        },
        on_attach = on_attach,
        capabilities = capabilities
    }
end

require("clangd_extensions").setup({
    server = {
        cmd = {
            'clangd',
            '--compile-commands-dir=build',
            '--clang-tidy', -- needs >=clangd-9
            '--ranking-model=decision_forest' -- needs >=clangd-12
        },
        on_attach = on_attach,
        capabilities = capabilities
    },
    extensions = {
        inlay_hints = {
            show_parameter_hints = false
        }
    }
})

if vim.fn.executable('lua-language-server') > 0 then
    lspconfig.sumneko_lua.setup({
        settings = {
            Lua = {
                runtime = {
                    version = 'LuaJIT',
                },
                diagnostics = {
                    globals = { 'vim' },
                },
                workspace = {
                    library = vim.api.nvim_get_runtime_file('', true),
                },
                telemetry = {
                    enable = false,
                },
                completion = {
                    -- complete full function signature
                    callSnippet = 'Replace',
                },
            },
        },
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('pylsp') > 0 then
    lspconfig.pylsp.setup({
        settings = {
            pylsp = {
            }
        },
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('lemminx') > 0 then
    lspconfig.lemminx.setup({
        filetypes = {
            'xml', 'xsd', 'xsl', 'xslt', 'svg', 'gentoo-metadata'
        },
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('vscode-html-language-server') > 0 then
    lspconfig.html.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('vscode-css-language-server') > 0 then
    lspconfig.cssls.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('vscode-eslint-language-server') > 0 then
    lspconfig.eslint.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('vscode-json-language-server') > 0 then
    lspconfig.jsonls.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('rust_analyzer') > 0 then
    lspconfig.rust_analyzer.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

if vim.fn.executable('gopls') > 0 then
    lspconfig.gopls.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

-- binary probably doesn't exist even when installed
if vim.fn.executable('perlls') > 0 then
    lspconfig.perlls.setup({
        on_attach = on_attach,
        capabilities = capabilities
    })
end

require('lsp-format').setup({
    sync = true -- seems to be needed to not interfere with Neogit
})