1 files changed, 135 insertions, 0 deletions
diff --git a/.config/nvim/lsp/copilot.lua b/.config/nvim/lsp/copilot.lua
new file mode 100644
index 0000000..66c2dd5
--- /dev/null
+++ b/.config/nvim/lsp/copilot.lua
@@ -0,0 +1,135 @@
+---@brief
+---
+--- https://www.npmjs.com/package/@github/copilot-language-server
+---
+--- The Copilot Language Server enables any editor or IDE
+--- to integrate with GitHub Copilot via
+--- [the language server protocol](https://microsoft.github.io/language-server-protocol/).
+---
+--- **[GitHub Copilot](https://github.com/features/copilot)**
+--- is an AI pair programmer tool that helps you write code faster and smarter.
+---
+--- **Sign up for [GitHub Copilot Free](https://github.com/settings/copilot)!**
+---
+--- Please see [terms of use for GitHub Copilot](https://docs.github.com/en/site-policy/github-terms/github-terms-for-additional-products-and-features#github-copilot)
+---
+--- You need to enable `:help lsp-inline-completion` to receive suggestions. For example, you can enable it in the LspAttach event:
+---
+--- ```lua
+--- vim.api.nvim_create_autocmd('LspAttach', {
+---   callback = function(args)
+---     local bufnr = args.buf
+---     local client = assert(vim.lsp.get_client_by_id(args.data.client_id))
+---
+---     if client:supports_method(vim.lsp.protocol.Methods.textDocument_inlineCompletion, bufnr) then
+---       vim.lsp.inline_completion.enable(true, { bufnr = bufnr })
+---
+---       vim.keymap.set(
+---         'i',
+---         '<C-F>',
+---         vim.lsp.inline_completion.get,
+---         { desc = 'LSP: accept inline completion', buffer = bufnr }
+---       )
+---       vim.keymap.set(
+---         'i',
+---         '<C-G>',
+---         vim.lsp.inline_completion.select,
+---         { desc = 'LSP: switch inline completion', buffer = bufnr }
+---       )
+---     end
+---   end
+--- })
+--- ```
+
+---@param bufnr integer,
+---@param client vim.lsp.Client
+local function sign_in(bufnr, client)
+  client:request(
+    ---@diagnostic disable-next-line: param-type-mismatch
+    'signIn',
+    vim.empty_dict(),
+    function(err, result)
+      if err then
+        vim.notify(err.message, vim.log.levels.ERROR)
+        return
+      end
+      if result.command then
+        local code = result.userCode
+        local command = result.command
+        vim.fn.setreg('+', code)
+        vim.fn.setreg('*', code)
+        local continue = vim.fn.confirm(
+          'Copied your one-time code to clipboard.\n' .. 'Open the browser to complete the sign-in process?',
+          '&Yes\n&No'
+        )
+        if continue == 1 then
+          client:exec_cmd(command, { bufnr = bufnr }, function(cmd_err, cmd_result)
+            if cmd_err then
+              vim.notify(err.message, vim.log.levels.ERROR)
+              return
+            end
+            if cmd_result.status == 'OK' then
+              vim.notify('Signed in as ' .. cmd_result.user .. '.')
+            end
+          end)
+        end
+      end
+
+      if result.status == 'PromptUserDeviceFlow' then
+        vim.notify('Enter your one-time code ' .. result.userCode .. ' in ' .. result.verificationUri)
+      elseif result.status == 'AlreadySignedIn' then
+        vim.notify('Already signed in as ' .. result.user .. '.')
+      end
+    end
+  )
+end
+
+---@param client vim.lsp.Client
+local function sign_out(_, client)
+  client:request(
+    ---@diagnostic disable-next-line: param-type-mismatch
+    'signOut',
+    vim.empty_dict(),
+    function(err, result)
+      if err then
+        vim.notify(err.message, vim.log.levels.ERROR)
+        return
+      end
+      if result.status == 'NotSignedIn' then
+        vim.notify('Not signed in.')
+      end
+    end
+  )
+end
+
+---@type vim.lsp.Config
+return {
+  cmd = {
+    'copilot-language-server',
+    '--stdio',
+  },
+  root_markers = { '.git' },
+  init_options = {
+    editorInfo = {
+      name = 'Neovim',
+      version = tostring(vim.version()),
+    },
+    editorPluginInfo = {
+      name = 'Neovim',
+      version = tostring(vim.version()),
+    },
+  },
+  settings = {
+    telemetry = {
+      telemetryLevel = 'all',
+    },
+  },
+  on_attach = function(client, bufnr)
+    vim.api.nvim_buf_create_user_command(bufnr, 'LspCopilotSignIn', function()
+      sign_in(bufnr, client)
+    end, { desc = 'Sign in Copilot with GitHub' })
+    vim.api.nvim_buf_create_user_command(bufnr, 'LspCopilotSignOut', function()
+      sign_out(bufnr, client)
+    end, { desc = 'Sign out Copilot with GitHub' })
+  end,
+}