nvim: simplify lsp setup

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

@@ -88,6 +88,26 @@ vim.lsp.handlers['textDocument/hover'] = vim.lsp.with(
 -- 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',
+    ['rust_analyzer'] = 'rust_analyzer',
+    ['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) > 0 then
+        lspconfig[ls].setup({
+            on_attach = on_attach,
+            capabilities = capabilities
+        })
+    end
+end
+
 if vim.fn.executable('clangd') > 0 then
     require("clangd_extensions").setup({
         server = {
@@ -165,41 +185,6 @@ if vim.fn.executable('lemminx') > 0 then
     })
 end
 
-if vim.fn.executable('vscode-html-language-server') > 0 then
-    lspconfig.html.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
-if vim.fn.executable('vscode-css-language-server') > 0 then
-    lspconfig.cssls.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
-if vim.fn.executable('vscode-json-language-server') > 0 then
-    lspconfig.jsonls.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
-if vim.fn.executable('rust_analyzer') > 0 then
-    lspconfig.rust_analyzer.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
-if vim.fn.executable('gopls') > 0 then
-    lspconfig.gopls.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
 if vim.fn.glob('/usr/lib64/perl5/vendor_perl/5.*/Perl/LanguageServer.pm') ~= ''
 then
     lspconfig.perlls.setup({
@@ -224,13 +209,6 @@ if vim.fn.executable('bash-language-server') > 0 then
     })
 end
 
-if vim.fn.executable('cmake-language-server') > 0 then
-    lspconfig.cmake.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
 if vim.fn.executable('typescript-language-server') > 0 then
     lspconfig.tsserver.setup({
         cmd = {
@@ -242,20 +220,6 @@ if vim.fn.executable('typescript-language-server') > 0 then
     })
 end
 
-if vim.fn.executable('yaml-language-server') > 0 then
-    lspconfig.yamlls.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
-if vim.fn.executable('docker-langserver') > 0 then
-    lspconfig.dockerls.setup({
-        on_attach = on_attach,
-        capabilities = capabilities
-    })
-end
-
 require('lsp-format').setup({
     sync = true -- seems to be needed to not interfere with Neogit
 })