feat: allow custom eol characters

Closes #609

Author: KnisterPeter

src/index.ts

@@ -1,7 +1,6 @@
 import * as babylon from 'babylon';
 import * as fs from 'fs';
 import * as getStdin from 'get-stdin';
-
 import { generateTypings } from './deprecated';
 import { Generator } from './generator';
 import { createTypings } from './typings';
@@ -47,6 +46,15 @@ export interface Options {
    * @memberOf Options
    */
   filename?: string;
+
+  /**
+   * EOL character. This would be changed to whatever is liked to
+   * terminate lines. Defaults to '\r\n'
+   * 
+   * @type {string}
+   * @memberOf Options
+   */
+  eol?: string;
 }
 
 export function cli(options: any): void {

src/typings.ts

@@ -1,9 +1,10 @@
 import * as ASTQ from 'astq';
 import * as dom from 'dts-dom';
-import pascalCase = require('pascal-case');
 import { InstanceOfResolver, IOptions } from './index';
 import * as types from './types';
 
+import pascalCase = require('pascal-case');
+
 export interface AstQuery {
   ast: any;
   query(query: string): any[];
@@ -22,6 +23,9 @@ export interface ImportedPropTypes {
 
 export function createTypings(moduleName: string|null, programAst: any, options: IOptions,
     reactImport: string): string {
+  // #609: configure eol character
+  dom.config.outputEol = options.eol || '\r\n';
+
   const astq = new ASTQ();
   const ast = {
     ast: programAst,

tests/parsing-test.ts

@@ -1,11 +1,9 @@
 // tslint:disable:no-implicit-dependencies
 import test, { TestContext } from 'ava';
-
 import chalk from 'chalk';
 import * as diff from 'diff';
 import * as fs from 'fs';
 import * as path from 'path';
-
 import * as react2dts from '../src/index';
 
 let basedir = path.join(__dirname, '..', '..', 'tests');
@@ -118,3 +116,10 @@ test('Parsing should support an SFC with default export babeled to es6', t => {
 test('Parsing should suppport components that extend PureComponent', t => {
   compare(t, 'component', 'pure-component.jsx', 'pure-component.d.ts');
 });
+test('Parsing should suppport custom eol style', t => {
+  textDiff(
+    t,
+    react2dts.generateFromFile('component', path.join(basedir, 'pure-component.jsx'), {eol: '\n'}, 'react'),
+    fs.readFileSync(path.join(basedir, 'pure-component.d.ts')).toString().replace('\r\n', '\n')
+  );
+});