Add new editor prompt

packages/editor/demo.js

@@ -0,0 +1,17 @@
+const editor = require('.');
+
+(async () => {
+  let answer;
+
+  answer = await editor({
+    message: 'Please write a short bio of at least 3 lines.',
+    validate: function(text) {
+      if (text.split('\n').length < 3) {
+        return 'Must be at least 3 lines.';
+      }
+
+      return true;
+    }
+  });
+  console.log('Answer:', answer);
+})();

packages/editor/index.js

@@ -0,0 +1,55 @@
+const chalk = require('chalk');
+const { editAsync } = require('external-editor');
+const { createPrompt, useState, useKeypress } = require('@inquirer/core/hooks');
+const { usePrefix } = require('@inquirer/core/lib/prefix');
+const { isEnterKey } = require('@inquirer/core/lib/key');
+
+module.exports = createPrompt((config, done) => {
+  const [status, setStatus] = useState('pending');
+  const [errorMsg, setError] = useState();
+
+  useKeypress(async (key, rl) => {
+    // Ignore keypress while our prompt is doing other processing.
+    if (status !== 'pending') {
+      return;
+    }
+
+    if (isEnterKey(key)) {
+      rl.pause();
+      editAsync(config.default || '', async (error, answer) => {
+        rl.resume();
+        if (error) {
+          setError(error);
+        } else {
+          setStatus('loading');
+          const isValid = await config.validate(answer);
+          if (isValid === true) {
+            setError(undefined);
+            setStatus('done');
+            done(answer);
+          } else {
+            setError(isValid || 'You must provide a valid value');
+            setStatus('pending');
+          }
+        }
+      });
+    }
+  });
+
+  const isLoading = status === 'loading';
+  const prefix = usePrefix(isLoading);
+
+  let message = chalk.bold(config.message);
+  if (status === 'loading') {
+    message += chalk.dim(' Received');
+  } else if (status === 'pending') {
+    message += chalk.dim(' Press <enter> to launch your preferred editor.');
+  }
+
+  let error = '';
+  if (errorMsg) {
+    error = chalk.red(`> ${errorMsg}`);
+  }
+
+  return [`${prefix} ${message}`, error];
+});

packages/editor/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "@inquirer/editor",
+  "version": "0.0.0",
+  "description": "Inquirer multiline editor prompt",
+  "main": "index.js",
+  "repository": "SBoudrias/Inquirer.js",
+  "keywords": [
+    "cli",
+    "prompt",
+    "command-line",
+    "input"
+  ],
+  "author": "Simon Boudrias <admin@simonboudrias.com>",
+  "license": "MIT",
+  "dependencies": {
+    "@inquirer/core": "^0.0.6-alpha.0",
+    "chalk": "^2.4.1",
+    "external-editor": "^3.0.3"
+  },
+  "publishConfig": {
+    "access": "public"
+  }
+}