neovim の設定をする go の開発をできるようにする

git clone --depth 1 https://github.com/wbthomason/packer.nvim\
 ~/.local/share/nvim/site/pack/packer/start/packer.nvim

mkdir ~/.config/nvim/lua
touch ~/.config/nvim/lua/plugins.lua
echo "require \"plugins\"" >  ~/.config/nvim/init.lua
cat  ~/.config/nvim/init.lua                         
require "plugins"

vim.cmd [[packadd packer.nvim]]

return require('packer').startup(function(use)
	use { "wbthomason/packer.nvim", opt = true }
	use {
		'nvim-tree/nvim-tree.lua',
		requires = {
			'nvim-tree/nvim-web-devicons', -- optional, for file icons
		},
		tag = 'nightly' -- optional, updated every week. (see issue #1193)
	}
end)

return require('packer').startup(function(use)
	use "neovim/nvim-lspconfig"
end)

require'lspconfig'.gopls.setup{}
-- Mappings.
-- See `:help vim.diagnostic.*` for documentation on any of the below functions
local opts = { noremap=true, silent=true }
vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)

-- Use an on_attach function to only map the following keys
-- after the language server attaches to the current buffer
local on_attach = function(client, bufnr)
  -- Enable completion triggered by <c-x><c-o>
  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  -- See `:help vim.lsp.*` for documentation on any of the below functions
  local bufopts = { noremap=true, silent=true, buffer=bufnr }
  vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
  vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
  vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
  vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
  vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
  vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
  vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
  vim.keymap.set('n', '<space>wl', function()
    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
  end, bufopts)
  vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, bufopts)
  vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, bufopts)
  vim.keymap.set('n', '<space>ca', vim.lsp.buf.code_action, bufopts)
  vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
  vim.keymap.set('n', '<space>f', function() vim.lsp.buf.format { async = true } end, bufopts)
end

local lsp_flags = {
  -- This is the default in Nvim 0.7+
  debounce_text_changes = 150,
}
require('lspconfig')['pyright'].setup{
    on_attach = on_attach,
    flags = lsp_flags,
}
require('lspconfig')['tsserver'].setup{
    on_attach = on_attach,
    flags = lsp_flags,
}
require('lspconfig')['rust_analyzer'].setup{
    on_attach = on_attach,
    flags = lsp_flags,
    -- Server-specific settings...
    settings = {
      ["rust-analyzer"] = {}
    }
}

require "lsp"

require("nvim-tree").setup({
	open_on_setup = true,
})

function n() {
	nvim $1 -c NvimTreeToggle
}

return require('packer').startup(function(use)
	use 'hrsh7th/cmp-nvim-lsp'
	use 'hrsh7th/cmp-buffer'
	use 'hrsh7th/cmp-path'
	use 'hrsh7th/cmp-cmdline'
	use 'hrsh7th/nvim-cmp'
	
	use 'L3MON4D3/LuaSnip'
	use 'saadparwaiz1/cmp_luasnip'
end)

local cmp = require'cmp'

cmp.setup({
	snippet = {
		expand = function(args)
		require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
	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 = 'luasnip' }, -- For luasnip users.
	}, {
		{ name = 'buffer' },
	})
})

-- Set configuration for specific filetype.
cmp.setup.filetype('gitcommit', {
	sources = cmp.config.sources({
		{ name = 'cmp_git' }, -- You can specify the `cmp_git` source if you were installed it.
	}, {
		{ name = 'buffer' },
	})
})

-- 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' }
	})
})

-- Set up lspconfig.
local capabilities = require('cmp_nvim_lsp').default_capabilities()
-- Replace <YOUR_LSP_SERVER> with each lsp server you've enabled.
require('lspconfig')['gopls'].setup {
	capabilities = capabilities
}

require "comp"

vim.opt.list = true
vim.opt.listchars = {
	tab = '│·',
	extends = '⟩',
	precedes = '⟨',
	trail = '·',
	eol = '↴',
	nbsp = '%'
}

require "base"

return require('packer').startup(function(use)
	-- {} とか自動で閉じてくれるやつ
	use {
		"windwp/nvim-autopairs",
		config = function() require("nvim-autopairs").setup {} end
	}
end)

return require('packer').startup(function(use)
	use { "fatih/vim-go", opt = true, ft = { "go" } }
end)

return require('packer').startup(function(use)
	use "tpope/vim-commentary"
end)