Allow .js config file (#56)

* allow js as a config file

lib/compiler.ts

@@ -88,13 +88,16 @@ export default class Compiler {
   }
 }
 
+export function loadConfig(configPath: string) {
+  if (configPath) {
+    return require(path.join(process.cwd(), configPath));
+  }
+  return {};
+}
+
 export async function compile(configPath: string, options = {}) {
   try {
-    let config = {};
-    if (configPath) {
-      const contents = fs.readFileSync(configPath, 'utf-8');
-      config = JSON.parse(contents);
-    }
+    const config = loadConfig(configPath);
     const compiler = new Compiler(config, options);
     await compiler.compile();
   } catch (err) {

test/compiler/e2e.ts

@@ -1,13 +1,14 @@
 import fs from 'fs';
 import fsx from 'fs-extra';
+import path from 'path';
 import {join, resolve} from 'path';
 import {expect} from 'chai';
-import {compile} from '../../lib/compiler';
+import {compile, loadConfig} from '../../lib/compiler';
 import {readFileContent, isFile, deepCopy} from '../../lib/utils';
 import {deployContract, link, getWallets, createMockProvider} from '../../lib/waffle';
 
 const configurations = [
-  './test/projects/custom/config.json',
+  './test/projects/custom/config.js',
   './test/projects/custom/config_native.json',
   './test/projects/custom/config_docker.json',
   './test/projects/custom_solidity_4/config_solcjs.json',
@@ -45,7 +46,7 @@ describe('E2E: Compiler integration', () => {
   });
 
   for (const configurationPath of configurations)  {
-    const configuration = JSON.parse(readFileContent(configurationPath));
+    const configuration = loadConfig(configurationPath);
     const {name, targetPath} = configuration;
 
     /* eslint-disable no-loop-func */

test/projects/custom/config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  name: "solidity 5, solcjs",
+  sourcesPath: "./test/projects/custom/custom_contracts",
+  targetPath: "./test/projects/custom/custom_build",
+  npmPath: "./test/projects/custom/custom_node_modules"
+};