nvim: big lua update

vim/.config/nvim/lua/plugins/cmp.lua

@@ -0,0 +1,63 @@
+local cmp = require 'cmp'
+local luasnip = require 'luasnip'
+
+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
+
+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.
+    ["<Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_next_item()
+      elseif luasnip.expand_or_jumpable() then
+        luasnip.expand_or_jump()
+      elseif has_words_before() then
+        cmp.complete()
+      else
+        fallback()
+      end
+    end, { "i", "s" }),
+    ["<S-Tab>"] = cmp.mapping(function(fallback)
+      if cmp.visible() then
+        cmp.select_prev_item()
+      elseif luasnip.jumpable(-1) then
+        luasnip.jump(-1)
+      else
+        fallback()
+      end
+    end, { "i", "s" }),
+  }),
+  sources = cmp.config.sources({
+    { name = 'nvim_lsp' },
+    { name = 'luasnip' }, -- For luasnip users.
+  }, {
+    { name = 'buffer' },
+  })
+})
+
+-- Set up lspconfig.
+local capabilities = require('cmp_nvim_lsp').default_capabilities()
+require('lspconfig')['solargraph'].setup({ capabilities = capabilities })
+
+-- require("luasnip.loaders.from_lua").lazy_load()
+
+require('luasnip').filetype_extend("ruby", {"rails"})
+require('luasnip.loaders.from_vscode').lazy_load()