1 files changed, 75 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/inquirer/lib/ui/baseUI.js b/tools/node_modules/eslint/node_modules/inquirer/lib/ui/baseUI.js
new file mode 100644
index 0000000000..98bb9a2897
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/inquirer/lib/ui/baseUI.js
@@ -0,0 +1,75 @@
+'use strict';
+var _ = require('lodash');
+var MuteStream = require('mute-stream');
+var readline = require('readline');
+
+/**
+ * Base interface class other can inherits from
+ */
+
+var UI = module.exports = function (opt) {
+  // Instantiate the Readline interface
+  // @Note: Don't reassign if already present (allow test to override the Stream)
+  if (!this.rl) {
+    this.rl = readline.createInterface(setupReadlineOptions(opt));
+  }
+  this.rl.resume();
+
+  this.onForceClose = this.onForceClose.bind(this);
+
+  // Make sure new prompt start on a newline when closing
+  process.on('exit', this.onForceClose);
+
+  // Terminate process on SIGINT (which will call process.on('exit') in return)
+  this.rl.on('SIGINT', this.onForceClose);
+};
+
+/**
+ * Handle the ^C exit
+ * @return {null}
+ */
+
+UI.prototype.onForceClose = function () {
+  this.close();
+  process.kill(process.pid, 'SIGINT');
+  console.log('');
+};
+
+/**
+ * Close the interface and cleanup listeners
+ */
+
+UI.prototype.close = function () {
+  // Remove events listeners
+  this.rl.removeListener('SIGINT', this.onForceClose);
+  process.removeListener('exit', this.onForceClose);
+
+  this.rl.output.unmute();
+
+  if (this.activePrompt && typeof this.activePrompt.close === 'function') {
+    this.activePrompt.close();
+  }
+
+  // Close the readline
+  this.rl.output.end();
+  this.rl.pause();
+  this.rl.close();
+};
+
+function setupReadlineOptions(opt) {
+  opt = opt || {};
+
+  // Default `input` to stdin
+  var input = opt.input || process.stdin;
+
+  // Add mute capabilities to the output
+  var ms = new MuteStream();
+  ms.pipe(opt.output || process.stdout);
+  var output = ms;
+
+  return _.extend({
+    terminal: true,
+    input: input,
+    output: output
+  }, _.omit(opt, ['input', 'output']));
+}