nvim: Working lua config for Go

3 files changed, 128 insertions, 0 deletions

diff --git a/.config/nvim/init.lua b/.config/nvim/init.lua
index 3bd72da..0946631 100644
--- a/.config/nvim/init.lua
+++ b/.config/nvim/init.lua
@@ -1,4 +1,6 @@
 require("plugins")
+require("lsp_cfg")
 require("settings")
 require("mappings")
 require("statusline")
+
diff --git a/.config/nvim/lua/lsp_cfg.lua b/.config/nvim/lua/lsp_cfg.lua
new file mode 100644
index 0000000..5fbace3
--- /dev/null
+++ b/.config/nvim/lua/lsp_cfg.lua
@@ -0,0 +1,120 @@
+-- Statusline via LSP
+local lsp_status = require('lsp-status')
+lsp_status.config({
+indicator_errors = 'E',
+indicator_warnings = 'W',
+indicator_info = 'i',
+indicator_hint = '?',
+indicator_ok = 'Ok',
+})
+lsp_status.register_progress()
+
+-- Main LSP Configs
+local nvim_lsp = require('lspconfig')
+local capabilities = vim.lsp.protocol.make_client_capabilities()
+capabilities.textDocument.completion.completionItem.snippetSupport = true
+
+-- Rust
+nvim_lsp.rust_analyzer.setup({
+  on_attach = lsp_status.on_attach,
+  capabilities = lsp_status.capabilities
+})
+
+-- Go
+local on_attach = function(client, bufnr)
+  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
+  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end
+
+  buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+  -- Mappings.
+  local opts = { noremap=true, silent=true }
+  buf_set_keymap('n', 'gD', '<Cmd>lua vim.lsp.buf.declaration()<CR>', opts)
+  buf_set_keymap('n', 'gd', '<Cmd>lua vim.lsp.buf.definition()<CR>', opts)
+  buf_set_keymap('n', 'ga', '<Cmd>lua vim.lsp.buf.code_action()<CR>', opts)
+  buf_set_keymap('n', 'K', '<Cmd>lua vim.lsp.buf.hover()<CR>', opts)
+  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
+  buf_set_keymap('n', '<C-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)
+--  buf_set_keymap('n', '\\wa', '<cmd>lua vim.lsp.buf.ad_workspace_folder()<CR>', opts)
+--  buf_set_keymap('n', '\\wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
+  buf_set_keymap('n', '\\wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
+  buf_set_keymap('n', '\\d', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
+--  buf_set_keymap('n', '\\rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)
+  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
+  buf_set_keymap('n', '\\e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
+  buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
+  buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
+  buf_set_keymap('n', '\\q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
+-- Original Keybinds
+  buf_set_keymap('n', '\\b', '<cmd>GoBuild<CR>', opts)
+
+  -- Set some keybinds conditional on server capabilities
+  if client.resolved_capabilities.document_formatting then
+    buf_set_keymap("n", "ff", "<cmd>lua vim.lsp.buf.formatting()<CR>", opts)
+  elseif client.resolved_capabilities.document_range_formatting then
+    buf_set_keymap("n", "ff", "<cmd>lua vim.lsp.buf.range_formatting()<CR>", opts)
+  end
+
+  -- Set autocommands conditional on server_capabilities
+  if client.resolved_capabilities.document_highlight then
+    vim.api.nvim_exec([[
+      hi LspReferenceRead cterm=bold ctermbg=DarkMagenta guibg=LightYellow
+      hi LspReferenceText cterm=bold ctermbg=DarkMagenta guibg=LightYellow
+      hi LspReferenceWrite cterm=bold ctermbg=DarkMagenta guibg=LightYellow
+      augroup lsp_document_highlight
+        autocmd! * <buffer>
+        autocmd CursorHold <buffer> lua vim.lsp.buf.document_highlight()
+        autocmd CursorMoved <buffer> lua vim.lsp.buf.clear_references()
+      augroup END
+    ]], false)
+  end
+end
+
+nvim_lsp.gopls.setup{
+	cmd = {'gopls'},
+	-- for postfix snippets and analyzers
+	capabilities = capabilities,
+	    settings = {
+	      gopls = {
+		      experimentalPostfixCompletions = true,
+		      analyses = {
+		        unusedparams = true,
+		        shadow = true,
+		     },
+		     staticcheck = true,
+		    },
+	    },
+	on_attach = on_attach,
+}
+
+  function goimports(timeoutms)
+    local context = { source = { organizeImports = true } }
+    vim.validate { context = { context, "t", true } }
+
+    local params = vim.lsp.util.make_range_params()
+    params.context = context
+
+    -- See the implementation of the textDocument/codeAction callback
+    -- (lua/vim/lsp/handler.lua) for how to do this properly.
+    local result = vim.lsp.buf_request_sync(0, "textDocument/codeAction", params, timeout_ms)
+    if not result or next(result) == nil then return end
+    local actions = result[1].result
+    if not actions then return end
+    local action = actions[1]
+
+    -- textDocument/codeAction can return either Command[] or CodeAction[]. If it
+    -- is a CodeAction, it can have either an edit, a command or both. Edits
+    -- should be executed first.
+    if action.edit or type(action.command) == "table" then
+      if action.edit then
+        vim.lsp.util.apply_workspace_edit(action.edit)
+      end
+      if type(action.command) == "table" then
+        vim.lsp.buf.execute_command(action.command)
+      end
+    else
+      vim.lsp.buf.execute_command(action)
+    end
+  end
+
+--vim.lsp.set_log_level("debug")d
diff --git a/.config/nvim/lua/settings.lua b/.config/nvim/lua/settings.lua
index 01c0fa8..7f67280 100644
--- a/.config/nvim/lua/settings.lua
+++ b/.config/nvim/lua/settings.lua
@@ -66,3 +66,9 @@ vim.o.directory = '/.vim/tmp/swap//'   -- swap files
 vim.o.wildmenu = true -- on TAB, complete options for system command
 vim.o.wildignore = 'deps,.svn,CVS,.git,.hg,*.o,*.a,*.class,*.mo,*.la,*.so,*.obj,*.swp,*.jpg,*.png,*.xpm,*.gif,.DS_Store,*.aux,*.out,*.toc'
 
+-- Language Settings
+-- Go
+vim.cmd [[
+autocmd BufWritePre *.go lua vim.lsp.buf.formatting()
+autocmd BufWritePre *.go lua goimports(1000)
+]]