nvim-cmpとLSPをちゃんと改めて設定してみる

• 周辺ツールが色々絡み合ってて難しいけど、下記記事が理解の参考になった
  • Neovim の LSP 関係のプラグインの役割
• 私がとりあえず必要そうなもの
  • nvim-cmp: 補完
  • nvim-lspconfig: 設定集
  • mason.nvim: Language Serverのマネージャー
  • mason-lspconfig: いい感じに設定を組み合わせてくれる君？

設定できた

return {
  {
    'https://github.com/hrsh7th/nvim-cmp',
    dependencies = {
      'neovim/nvim-lspconfig',
      'hrsh7th/cmp-nvim-lsp',
      'hrsh7th/cmp-buffer',
      'hrsh7th/cmp-path',
      'hrsh7th/cmp-cmdline',
    },
    lazy = true,
    config = function()
      local cmp = require'cmp'
 
      cmp.setup({
        snippet = {
          -- REQUIRED - you must specify a snippet engine
          expand = function(args)
            vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
            -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
            -- require('snippy').expand_snippet(args.body) -- For `snippy` users.
            -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
            -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
          end,
        },
        window = {
          -- completion = cmp.config.window.bordered(),
          -- documentation = cmp.config.window.bordered(),
        },
        mapping = cmp.mapping.preset.insert({
          ['<C-b>'] = cmp.mapping.scroll_docs(-4),
          ['<C-f>'] = cmp.mapping.scroll_docs(4),
          ['<C-Space>'] = cmp.mapping.complete(),
          ['<C-e>'] = cmp.mapping.abort(),
          ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
        }),
        sources = cmp.config.sources({
          { name = 'nvim_lsp' },
          { name = 'vsnip' }, -- For vsnip users.
          -- { name = 'luasnip' }, -- For luasnip users.
          -- { name = 'ultisnips' }, -- For ultisnips users.
          -- { name = 'snippy' }, -- For snippy users.
        }, {
          { name = 'buffer' },
        })
      })
 
      -- To use git you need to install the plugin petertriho/cmp-git and uncomment lines below
      -- Set configuration for specific filetype.
 
      -- Use buffer source for `/` and `?` (if you enabled `native_menu`, this won't work anymore).
      cmp.setup.cmdline({ '/', '?' }, {
        mapping = cmp.mapping.preset.cmdline(),
        sources = {
          { name = 'buffer' }
        }
      })
 
      -- Use cmdline & path source for ':' (if you enabled `native_menu`, this won't work anymore).
      cmp.setup.cmdline(':', {
        mapping = cmp.mapping.preset.cmdline(),
        sources = cmp.config.sources({
          { name = 'path' }
        }, {
          { name = 'cmdline' }
        }),
        matching = { disallow_symbol_nonprefix_matching = false }
      })
    end
  },
}