nvim/lua/plugins/golang.lua

return {
    {
        "maxandron/goplements.nvim",
        ft = "go",
        opts = {
            -- your configuration comes here
            -- or leave it empty to use the default settings
            -- refer to the configuration section below
        },
    },
    {
        "neovim/nvim-lspconfig",
        opts = {
            servers = {
                gopls = {
                    settings = {
                        gopls = {
                            analyses = {
                                fieldalignment = false,
                            },
                            usePlaceholders = false,
                            hints = {
                                assignVariableTypes = false,
                                compositeLiteralFields = false,
                                compositeLiteralTypes = false,
                                constantValues = false,
                                functionTypeParameters = false,
                                parameterNames = false,
                                rangeVariableTypes = false,
                            },
                        },
                    },
                },
            },
            setup = {
                gopls = function(_, opts)
                    require("lazyvim.util").lsp.on_attach(function(client, bufnr)
                        if client.name == "gopls" then
                            -- workaround for gopls not supporting semanticTokensProvider
                            -- https://github.com/golang/go/issues/54531#issuecomment-1464982242
                            if not client.server_capabilities.semanticTokensProvider then
                                local semantic = client.config.capabilities.textDocument.semanticTokens
                                client.server_capabilities.semanticTokensProvider = {
                                    full = true,
                                    legend = {
                                        tokenTypes = semantic.tokenTypes,
                                        tokenModifiers = semantic.tokenModifiers,
                                    },
                                    range = true,
                                }
                            end
                            -- end workaround

                            -- run lsp imports code action on save.
                            vim.api.nvim_create_autocmd("BufWritePre", {
                                desc = "Auto format and organize imports on save (gopls)",
                                group = vim.api.nvim_create_augroup("GoplsAutoFormat", {}),
                                buffer = bufnr,
                                callback = function(event)
                                    local context = { source = { organizeImports = true } }
                                    local params = vim.lsp.util.make_range_params()
                                    params.context = context
                                    local result =
                                        vim.lsp.buf_request_sync(event.buf, "textDocument/codeAction", params, 3000)
                                    if not result then
                                        return
                                    end
                                    if not result[1] then
                                        return
                                    end
                                    result = result[1].result
                                    if not result then
                                        return
                                    end
                                    if not result[1] then
                                        return
                                    end
                                    local edit = result[1].edit
                                    if not edit then
                                        return
                                    end
                                    vim.lsp.util.apply_workspace_edit(edit, "utf-8")
                                end,
                            })
                        end
                    end)
                end,
            },
        },
    },
    {
        "olexsmir/gopher.nvim",
        ft = "go",
    },
    {
        "edolphin-ydf/goimpl.nvim",
        ft = "go",
        config = function()
            require("telescope").load_extension "goimpl"
            vim.api.nvim_create_autocmd("LspAttach", {
                group = vim.api.nvim_create_augroup("GoImpl", {}),
                callback = function(ctx)
                    local client = vim.lsp.get_client_by_id(ctx.data.client_id) or {}
                    if client.name == "gopls" then
                        vim.api.nvim_create_user_command("Impl", [[Telescope goimpl]], {})
                        vim.keymap.set(
                            "n",
                            "<leader>ci",
                            [[<cmd>Telescope goimpl<cr>]],
                            { buffer = ctx.buf, desc = "Generate implementation stub" }
                        )
                    end
                end,
            })
        end,
    },
}