nvim: configure LSPs

.config/nvim/lua/my/functions.lua

@@ -19,7 +19,7 @@ function M.map(mode, shortcut, command, description, buffer)
     vim.keymap.set(mode, shortcut, command, opts)
 end
 
--- Files that could indicate the project's root directory
+-- files that could indicate the project's root directory
 M.project_root_markers = {
     '.git', '.hg', '.svn', '.bzr', '_darcs',
     '.projectile', '.luarc.json', '.editorconfig', 'Cargo.toml'
@@ -96,7 +96,7 @@ function M.current_function()
 end
 
 
--- Insert or update a modeline at the bottom of the buffer
+-- insert or update a modeline at the bottom of the buffer
 function M.insert_modeline()
     local comment_string = vim.o.commentstring
     if comment_string == '' then

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

@@ -0,0 +1,183 @@
+local map = require('my.functions').map
+
+local on_attach = function(client, bufnr)
+    -- TODO: key mappings
+
+    if client.server_capabilities.documentHighlightProvider then
+        vim.api.nvim_create_augroup('config_lsp', { clear = false })
+        vim.api.nvim_clear_autocmds({
+            buffer = bufnr,
+            group = 'config_lsp',
+        })
+        vim.api.nvim_create_autocmd({ 'CursorHold', 'CursorHoldI' }, {
+            group = 'config_lsp',
+            buffer = bufnr,
+            callback = vim.lsp.buf.document_highlight,
+        })
+        vim.api.nvim_create_autocmd({ 'CursorMoved', 'CursorMovedI' }, {
+            group = 'config_lsp',
+            buffer = bufnr,
+            callback = vim.lsp.buf.clear_references,
+        })
+    end
+
+    -- don't autoformat code like text
+    vim.bo.formatoptions = vim.o.formatoptions:gsub('t', '')
+
+    -- virtual text hint for parameters
+    require ('lsp_signature').on_attach({
+            bind = true,
+            handler_opts = {
+                border = 'rounded'
+            },
+            floating_window = false
+        }, bufnr)
+
+    require('lsp-status').on_attach(client)
+end
+
+-- add completion capabilities
+local capabilities = require('cmp_nvim_lsp').default_capabilities()
+
+-- add progress capabilities
+local lsp_status = require('lsp-status')
+lsp_status.register_progress()
+capabilities = vim.tbl_extend('keep', capabilities, lsp_status.capabilities)
+
+-- opens lsp.util.open_floating_preview() -> nvim_open_win()
+vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(vim.lsp.handlers.hover, {
+    border = 'rounded',
+    width = 60,
+    focusable = false,
+    -- next 2 lines do nothing, overwritten by open_floating_preview()
+    relative = 'win',
+    anchor = 'NE',
+})
+
+-- setup servers
+local lspconfig = require('lspconfig')
+
+-- set up language servers that don't need any special configuration
+local simple_ls = {
+    ['vscode-html-language-server'] = 'html',
+    ['vscode-css-language-server'] = 'cssls',
+    ['vscode-json-language-server'] = 'jsonls',
+    ['gopls'] = 'gopls',
+    ['cmake-language-server'] = 'cmake',
+    ['yaml-language-server'] = 'yamlls',
+    ['docker-langserver'] = 'dockerls',
+}
+for exe, ls in pairs(simple_ls) do
+    if vim.fn.executable(exe) == 1 then
+        lspconfig[ls].setup({
+            on_attach = on_attach,
+            capabilities = capabilities
+        })
+    end
+end
+
+if vim.fn.executable('clangd') > 0 then
+    require("clangd_extensions").setup({
+        server = {
+            cmd = {
+                'clangd',
+                '--compile-commands-dir=build',
+                '--clang-tidy',                   -- needs >=clangd-9
+                '--ranking-model=decision_forest' -- needs >=clangd-12
+            },
+            init_options = { clangdFileStatus = true },
+            on_attach = on_attach,
+            capabilities = capabilities,
+            handlers = lsp_status.extensions.clangd.setup(),
+        },
+        extensions = {
+            inlay_hints = {
+                show_parameter_hints = false
+            }
+        }
+    })
+end
+
+-- TODO: lua-language-server
+
+if vim.fn.executable('pylsp') == 1 then
+    lspconfig.pylsp.setup({
+        settings = {
+            pylsp = {
+            }
+        },
+        on_attach = on_attach,
+        capabilities = capabilities
+    })
+end
+
+if vim.fn.executable('lemminx') == 1 then
+    lspconfig.lemminx.setup({
+        filetypes = {
+            'xml', 'xsd', 'xsl', 'xslt', 'svg', 'gentoo-metadata'
+        },
+        settings = {
+            xml = {
+                server = { -- path for cached XML Schemas
+                    workDir = vim.fn.stdpath('cache') .. '/lemminx'
+                }
+            }
+        },
+        on_attach = on_attach,
+        capabilities = capabilities
+    })
+end
+
+if vim.fn.glob('/usr/lib64/perl5/vendor_perl/5.*/Perl/LanguageServer.pm') ~= ''
+then
+    lspconfig.perlls.setup({
+        on_attach = on_attach,
+        capabilities = capabilities
+    })
+end
+
+if vim.fn.executable('qml-lsp') == 1 then
+    lspconfig.qml_lsp.setup({
+        filetypes = { 'qml', 'qmljs' },
+        on_attach = on_attach,
+        capabilities = capabilities
+    })
+end
+
+if vim.fn.executable('bash-language-server') > 0 then
+    lspconfig.bashls.setup({
+        filetypes = { 'sh', 'bash', 'ebuild', 'gentoo-init-d.sh' },
+        on_attach = on_attach,
+        capabilities = capabilities
+    })
+end
+
+if vim.fn.executable('typescript-language-server') > 0 then
+    lspconfig.tsserver.setup({
+        cmd = {
+            'typescript-language-server', '--stdio',
+            '--tsserver-path', 'tsserver'
+        },
+        on_attach = on_attach,
+        capabilities = capabilities
+    })
+end
+
+if vim.fn.executable('rust-analyzer') == 1 then
+    require("rust-tools").setup({
+        server = {
+            on_attach = on_attach,
+            capabilities = capabilities,
+            settings = {
+                ["rust-analyzer"] = {
+                    -- checkOnSave = {
+                    --     command = "clippy",
+                    -- },
+                    -- diagnostics = {
+                    --     enable = true,
+                    -- },
+                }
+            }
+        },
+    })
+end

.config/nvim/lua/my/plugins/lsp.lua

@@ -1,4 +1,3 @@
--- TODO: configure
 return {
     { 'https://github.com/neovim/nvim-lspconfig',
         version = '*',
@@ -8,8 +7,12 @@ return {
         version = '*',
     },
     { 'https://github.com/ray-x/lsp_signature.nvim' },
-    { 'https://github.com/p00f/clangd_extensions.nvim' },
+    { 'https://github.com/p00f/clangd_extensions.nvim',
+        cond = vim.fn.executable('clangd') == 1,
+    },
     { 'https://github.com/simrat39/rust-tools.nvim',
         dependencies = 'nvim-lspconfig',
-    }
+        cond = vim.fn.executable('rust-analyzer') == 1,
+    },
+    { 'https://github.com/nvim-lua/lsp-status.nvim' },
 }

.config/nvim/lua/my/plugins/tools.lua

@@ -101,7 +101,7 @@ return {
     { 'https://github.com/nvim-lualine/lualine.nvim',
         dependencies = {
             'nvim-web-devicons',
-            'https://github.com/nvim-lua/lsp-status.nvim',
+            'lsp-status.nvim',
         },
         init = function()
             vim.o.showmode = false