Move formatBanner into packager folder

Reviewed By: davidaurelio

Differential Revision: D4868954

fbshipit-source-id: 7a28019c781262bcf4aab0ad2e67868d35ebf9fb

packages/metro-bundler/src/lib/TerminalReporter.js

@@ -12,12 +12,12 @@
 'use strict';
 
 const chalk = require('chalk');
+const formatBanner = require('./formatBanner');
 const path = require('path');
 const reporting = require('./reporting');
 const terminal = require('./terminal');
 const throttle = require('lodash/throttle');
 const util = require('util');
-const formatBanner = require('../../../local-cli/server/formatBanner');
 
 import type {ReportableEvent, GlobalCacheDisabledReason} from './reporting';
 

packages/metro-bundler/src/lib/formatBanner.js

@@ -0,0 +1,108 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+var _ = require('lodash');
+var wordwrap = require('wordwrap');
+
+var HORIZONTAL_LINE = '\u2500';
+var VERTICAL_LINE = '\u2502';
+var TOP_LEFT = '\u250c';
+var TOP_RIGHT = '\u2510';
+var BOTTOM_LEFT = '\u2514';
+var BOTTOM_RIGHT = '\u2518';
+
+/**
+ * Prints a banner with a border around it containing the given message. The
+ * following options are supported:
+ *
+ * type Options = {
+ *   // A function to apply to each line of text to decorate it
+ *   chalkFunction: (string: message) => string;
+ *   // The total width (max line length) of the banner, including margin and
+ *   // padding (default = 80)
+ *   width: number;
+ *   // How much leading space to prepend to each line (default = 0)
+ *   marginLeft: number;
+ *   // How much trailing space to append to each line (default = 0)
+ *   marginRight: number;
+ *   // Space between the top banner border and the text (default = 0)
+ *   paddingTop: number;
+ *   // Space between the bottom banner border and the text (default = 0)
+ *   paddingBottom: number;
+ *   // Space between the left banner border and the text (default = 2)
+ *   paddingLeft: number;
+ *   // Space between the right banner border and the text (default = 2)
+ *   paddingRight: number;
+ * };
+ */
+function formatBanner(message, options) {
+  options = options || {};
+  _.defaults(options, {
+    chalkFunction: _.identity,
+    width: 80,
+    marginLeft: 0,
+    marginRight: 0,
+    paddingTop: 0,
+    paddingBottom: 0,
+    paddingLeft: 2,
+    paddingRight: 2,
+  });
+
+  var width = options.width;
+  var marginLeft = options.marginLeft;
+  var marginRight = options.marginRight;
+  var paddingTop = options.paddingTop;
+  var paddingBottom = options.paddingBottom;
+  var paddingLeft = options.paddingLeft;
+  var paddingRight = options.paddingRight;
+
+  var horizSpacing = marginLeft + paddingLeft + paddingRight + marginRight;
+  // 2 for the banner borders
+  var maxLineWidth = width - horizSpacing - 2;
+  var wrap = wordwrap(maxLineWidth);
+  var body = wrap(message);
+
+  var left = spaces(marginLeft) + VERTICAL_LINE + spaces(paddingLeft);
+  var right = spaces(paddingRight) + VERTICAL_LINE + spaces(marginRight);
+  var bodyLines = _.flattenDeep([
+    arrayOf('', paddingTop),
+    body.split('\n'),
+    arrayOf('', paddingBottom),
+  ]).map(function(line) {
+    var padding = spaces(Math.max(0, maxLineWidth - line.length));
+    return left + options.chalkFunction(line) + padding + right;
+  });
+
+  var horizontalBorderLine = repeatString(
+    HORIZONTAL_LINE,
+    width - marginLeft - marginRight - 2
+  );
+  var top = spaces(marginLeft) + TOP_LEFT + horizontalBorderLine + TOP_RIGHT +
+    spaces(marginRight);
+  var bottom = spaces(marginLeft) + BOTTOM_LEFT + horizontalBorderLine +
+    BOTTOM_RIGHT + spaces(marginRight);
+  return _.flattenDeep([top, bodyLines, bottom]).join('\n');
+}
+
+function spaces(number) {
+  return repeatString(' ', number);
+}
+
+function repeatString(string, number) {
+  return new Array(number + 1).join(string);
+}
+
+function arrayOf(value, number) {
+  return _.range(number).map(function() {
+    return value;
+  });
+}
+
+module.exports = formatBanner;