dotfiles/nvim/.config/nvim/lua/plug/_lsp.lua

local cmp = require 'cmp'
local lspkind = require 'lspkind'

local has_words_before = function()
    local line, col = unpack(vim.api.nvim_win_get_cursor(0))
    return col ~= 0 and
               vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col,
                                                                          col)
                   :match("%s") == nil
end

local feedkey = function(key, mode)
    vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes(key, true, true, true),
                          mode, true)
end

vim.o.completeopt = "menu,menuone,noselect"

-- completion items
require('cmp').register_source('vCard', require('completion_vcard').setup_cmp(
                                   '~/documents/contacts/myconts'))
vim.g.vsnip_snippet_dir = (vim.env.XDG_DATA_HOME or "~/.local/share") ..
                              "/nvim/snippets"
cmp.setup({
    snippet = {expand = function(args) vim.fn["vsnip#anonymous"](args.body) end},
    mapping = {
        ['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), {'i', 'c'}),
        ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), {'i', 'c'}),
        ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), {'i', 'c'}),
        ['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
        ['<C-e>'] = cmp.mapping({
            i = cmp.mapping.abort(),
            c = cmp.mapping.close()
        }),
        -- Accept currently selected item. If none selected, `select` first item.
        -- Set `select` to `false` to only confirm explicitly selected items.
        ['<CR>'] = cmp.mapping.confirm({select = false}),
        ["<C-n>"] = cmp.mapping(function(fallback)
            if cmp.visible() then
                cmp.select_next_item()
            elseif vim.fn["vsnip#available"](1) == 1 then
                feedkey("<Plug>(vsnip-expand-or-jump)", "")
            elseif has_words_before() then
                cmp.complete()
            else
                fallback()
            end
        end, {"i", "s"}),

        ["<C-p>"] = cmp.mapping(function()
            if cmp.visible() then
                cmp.select_prev_item()
            elseif vim.fn["vsnip#jumpable"](-1) == 1 then
                feedkey("<Plug>(vsnip-jump-prev)", "")
            end
        end, {"i", "s"})
    },
    formatting = {
        format = lspkind.cmp_format({
            with_text = false,
            menu = ({
                buffer = "B",
                nvim_lua = "NLua",
                tmux = "τ",
                vCard = "VCARD"
            })
        })
    },
    sources = cmp.config.sources({
        {name = 'path'}, {name = 'nvim_lsp'}, {name = 'treesitter'},
        {name = 'tmux'}, {name = 'vsnip'}, {name = 'latex_symbols'},
        {name = 'pandoc_references'}, {name = 'vCard'}
    }, {{name = 'buffer'}, {name = 'spell'}})
})
if vim.o.ft == 'clap_input' and vim.o.ft == 'guihua' and vim.o.ft ==
    'guihua_rust' then require'cmp'.setup.buffer {completion = {enable = false}} end

-- Use buffer source for `/` search
cmp.setup.cmdline('/', {sources = {{name = 'buffer'}}})

-- Use cmdline & path source for ':' in vim
cmp.setup.cmdline(':', {
    sources = cmp.config.sources({{name = 'path'}}, {{name = 'cmdline'}})
})

require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol
                                                .make_client_capabilities())

-- requires the lua-language-server package to be installed
-- The arch package defaults to the following directory
local sumneko_root_path = "/usr/share/lua-language-server"
require'navigator'.setup({
    lsp = {
        servers = {'efm'},
        sumneko_lua = {
            cmd = {
                "lua-language-server", "-E", sumneko_root_path .. "/main.lua"
            },
            settings = {
                Lua = {
                    runtime = {
                        -- Tell the language server which version of Lua you're using (most likely LuaJIT in the case of Neovim)
                        version = 'LuaJIT',
                        -- Setup your lua path
                        path = vim.split(package.path, ';')
                    },
                    diagnostics = {
                        -- Get the language server to recognize additional globals
                        globals = {
                            'vim', 'before_each', 'after_each', 'describe',
                            'it', 'mock', 'stub'
                        }
                    },
                    workspace = {
                        -- Make the server aware of additional runtime files
                        library = {
                            [vim.fn.expand('$VIMRUNTIME/lua')] = true,
                            [vim.fn.expand('$VIMRUNTIME/lua/vim/lsp')] = true,
                            ["/usr/share/lua/5.1/busted/"] = true
                        }
                    }
                }
            }
        },
        efm = {
            init_options = {
                documentFormatting = true,
                codeAction = true,
                completion = true,
                documentSymbol = true,
                hover = true
            },
            filetypes = {"sh"},
            settings = {
                rootMarkers = {".git/"},
                languages = {
                    sh = {
                        {
                            lintCommand = 'shellcheck -f gcc -x',
                            lintFormats = {
                                '%f:%l:%c: %trror: %m',
                                '%f:%l:%c: %tarning: %m', '%f:%l:%c: %tote: %m'
                            }
                        },
                        {formatCommand = 'shfmt -ci -s -bn', formatStdin = true}
                    }
                }
            }
        }

    }
})
require"lsp_signature".setup()