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config/.config/nvim/lua/lsp.lua

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+-- 1. Configure CiderLSP
+local nvim_lsp = require("lspconfig")
+local configs = require("lspconfig.configs")
+configs.ciderlsp = {
+  default_config = {
+    cmd = { "/google/bin/releases/cider/ciderlsp/ciderlsp", "--tooltag=nvim-lsp", "--noforward_sync_responses" },
+    filetypes = { "c", "cpp", "java", "kotlin", "proto", "textproto", "go", "python", "bzl" },
+    root_dir = nvim_lsp.util.root_pattern("BUILD"),
+    settings = {},
+  },
+}
+
+-- 2. Configure CMP
+vim.opt.completeopt = { "menu", "menuone", "noselect" }
+
+-- Don't show the dumb matching stuff
+vim.opt.shortmess:append("c")
+
+local lspkind = require("lspkind")
+lspkind.init()
+
+local cmp = require("cmp")
+
+cmp.setup({
+  mapping = {
+    ["<C-d>"] = cmp.mapping.scroll_docs(-4),
+    ["<C-u>"] = cmp.mapping.scroll_docs(4),
+    ["<C-e>"] = cmp.mapping.close(),
+    ["<C-Space>"] = cmp.mapping(cmp.mapping.complete(), { "i", "c" }),
+    ["<C-m>"] = cmp.mapping.confirm({ select = true }),
+    ["<Tab>"] = 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() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
+    end
+  end, { "i", "s" }),
+
+  ["<S-Tab>"] = 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" }),
+
+    ["<Up>"] = cmp.mapping(function(fallback)
+    if cmp.visible() then
+      cmp.select_prev_item()
+    elseif vim.fn["vsnip#available"](1) == 1 then
+      feedkey("<Plug>(vsnip-jump-prev)", "")
+    else
+      fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
+    end
+  end),
+
+    ["<Down>"] = 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)", "")
+    else
+      fallback() -- The fallback function sends a already mapped key. In this case, it's probably `<Tab>`.
+    end
+  end),
+  },
+
+  sources = {
+    { name = "nvim_lua" },
+    { name = "nvim_lsp" },
+    { name = "path" },
+    { name = "vim_vsnip" },
+    { name = "buffer", keyword_length = 5 },
+  },
+
+  sorting = {
+    comparators = {
+      cmp.config.compare.offset,
+      cmp.config.compare.exact,
+      cmp.config.compare.score,
+
+      function(entry1, entry2)
+        local _, entry1_under = entry1.completion_item.label:find("^_+")
+        local _, entry2_under = entry2.completion_item.label:find("^_+")
+        entry1_under = entry1_under or 0
+        entry2_under = entry2_under or 0
+        if entry1_under > entry2_under then
+          return false
+        elseif entry1_under < entry2_under then
+          return true
+        end
+      end,
+
+      cmp.config.compare.kind,
+      cmp.config.compare.sort_text,
+      cmp.config.compare.length,
+      cmp.config.compare.order,
+    },
+  },
+
+  snippet = {
+    expand = function(args)
+      vim.fn["vsnip#anonymous"](args.body)
+    end,
+  },
+
+  formatting = {
+    format = lspkind.cmp_format({
+      with_text = true,
+      maxwidth = 40, -- half max width
+      menu = {
+        buffer = "[buffer]",
+        nvim_lsp = "[CiderLSP]",
+        nvim_lua = "[API]",
+        path = "[path]",
+        vim_vsnip = "[snip]",
+      },
+    }),
+  },
+
+  experimental = {
+    native_menu = false,
+    ghost_text = true,
+  },
+})
+
+vim.cmd([[
+  augroup CmpZsh
+    au!
+    autocmd Filetype zsh lua require'cmp'.setup.buffer { sources = { { name = "zsh" }, } }
+  augroup END
+]])
+
+-- 3. Set up CiderLSP
+local on_attach = function(client, bufnr)
+  vim.api.nvim_buf_set_option(bufnr, "omnifunc", "v:lua.vim.lsp.omnifunc")
+  if vim.lsp.formatexpr then -- Neovim v0.6.0+ only.
+    vim.api.nvim_buf_set_option(bufnr, "formatexpr", "v:lua.vim.lsp.formatexpr")
+  end
+  if vim.lsp.tagfunc then
+    vim.api.nvim_buf_set_option(bufnr, "tagfunc", "v:lua.vim.lsp.tagfunc")
+  end
+
+  local opts = { noremap = true, silent = true }
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>rn", "<cmd>lua vim.lsp.buf.rename()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "<leader>ca", "<cmd>lua vim.lsp.buf.code_action()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "L", "<cmd>lua vim.lsp.buf.hover()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "g0", "<cmd>lua vim.lsp.buf.document_symbol()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gW", "<cmd>lua vim.lsp.buf.workspace_symbol()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gd", "<cmd>lua vim.lsp.buf.definition()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gD", "<cmd>lua vim.lsp.buf.declaration()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "<C-k>", "<cmd>lua vim.lsp.buf.signature_help()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "gt", "<cmd>lua vim.lsp.buf.type_definition()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "[g", "<cmd>lua vim.diagnostic.goto_prev()<CR>", opts)
+  vim.api.nvim_buf_set_keymap(bufnr, "n", "]g", "<cmd>lua vim.diagnostic.goto_next()<CR>", opts)
+
+  vim.api.nvim_command("augroup LSP")
+  vim.api.nvim_command("autocmd!")
+  if client.resolved_capabilities.document_highlight then
+    vim.api.nvim_command("autocmd CursorHold  <buffer> lua vim.lsp.buf.document_highlight()")
+    vim.api.nvim_command("autocmd CursorHoldI <buffer> lua vim.lsp.buf.document_highlight()")
+    vim.api.nvim_command("autocmd CursorMoved <buffer> lua vim.lsp.util.buf_clear_references()")
+  end
+  vim.api.nvim_command("augroup END")
+end
+
+nvim_lsp.ciderlsp.setup({
+  capabilities = require("cmp_nvim_lsp").update_capabilities(vim.lsp.protocol.make_client_capabilities()),
+  on_attach = on_attach,
+})