Require Node.js 6 (#8)

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

@@ -1,8 +1,9 @@
 sudo: false
 language: node_js
 node_js:
+  - '10'
+  - '8'
   - '6'
-  - '4'
 os:
   - linux
   - osx
@@ -16,4 +17,4 @@ addons:
       - libpng-dev
 before_install:
   - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then export CC=gcc-5 CXX=g++-5; fi
-  - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then brew update && brew upgrade libpng; fi
+  - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then brew upgrade libpng; fi

cli.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 'use strict';
-const spawn = require('child_process').spawn;
+const {spawn} = require('child_process');
 const guetzli = require('.');
 
 const input = process.argv.slice(2);

lib/install.js

@@ -1,28 +1,21 @@
 'use strict';
-const BinBuild = require('bin-build');
+const binBuild = require('bin-build');
 const log = require('logalot');
 const bin = require('.');
 
-bin.run(['--version'], err => {
-	if (err) {
-		log.warn(err.message);
-		log.warn('guetzli pre-build test failed');
-		log.info('compiling from source');
-
-		const builder = new BinBuild()
-			.src('https://github.com/google/guetzli/archive/v1.0.1.tar.gz')
-			.cmd(`mkdir -p ${bin.dest()}`)
-			.cmd(`make && mv bin/Release/${bin.use()} ${bin.path()}`);
-
-		return builder.run(err => {
-			if (err) {
-				log.error(err.stack);
-				return;
-			}
-
-			log.success('guetzli built successfully');
-		});
-	}
-
+bin.run(['--verbose']).then(() => {
 	log.success('guetzli pre-build test passed successfully');
+}).catch(error => {
+	log.warn(error.message);
+	log.warn('guetzli pre-build test failed');
+	log.info('compiling from source');
+
+	binBuild.url('https://github.com/google/guetzli/archive/v1.0.1.tar.gz', [
+		`mkdir -p ${bin.dest()}`,
+		`make && mv bin/Release/${bin.use()} ${bin.path()}`
+	]).then(() => {
+		log.success('guetzli built successfully');
+	}).catch(error => {
+		log.error(error.stack);
+	});
 });

package.json

@@ -13,7 +13,7 @@
     "guetzli": "cli.js"
   },
   "engines": {
-    "node": ">=4"
+    "node": ">=6"
   },
   "scripts": {
     "postinstall": "node lib/install.js",
@@ -36,17 +36,17 @@
     "optimize"
   ],
   "dependencies": {
-    "bin-build": "^2.2.0",
-    "bin-wrapper": "^3.0.2",
+    "bin-build": "^3.0.0",
+    "bin-wrapper": "^4.0.0",
     "logalot": "^2.1.0"
   },
   "devDependencies": {
     "ava": "*",
     "bin-check": "^4.0.1",
     "compare-size": "^3.0.0",
-    "execa": "^0.6.3",
+    "execa": "^1.0.0",
     "executable": "^4.1.0",
-    "tempy": "^0.1.0",
+    "tempy": "^0.2.1",
     "xo": "*"
   }
 }

test/test.js

@@ -4,23 +4,20 @@ const test = require('ava');
 const execa = require('execa');
 const tempy = require('tempy');
 const binCheck = require('bin-check');
-const BinBuild = require('bin-build');
+const binBuild = require('bin-build');
 const compareSize = require('compare-size');
 const executable = require('executable');
 const guetzli = require('..');
 
-test.cb('rebuild the guetzli binaries', t => {
+test('rebuild the guetzli binaries', async t => {
 	const tmp = tempy.directory();
 
-	new BinBuild()
-		.src('https://github.com/google/guetzli/archive/v1.0.1.tar.gz')
-		.cmd(`mkdir -p ${tmp}`)
-		.cmd(`make && mv bin/Release/guetzli ${tmp}`)
-		.run(err => {
-			t.ifError(err);
-			t.true(executable.sync(path.join(tmp, 'guetzli')));
-			t.end();
-		});
+	await binBuild.url('https://github.com/google/guetzli/archive/v1.0.1.tar.gz', [
+		`mkdir -p ${tmp}`,
+		`make && mv bin/Release/guetzli ${tmp}`
+	]);
+
+	t.true(executable.sync(path.join(tmp, 'guetzli')));
 });
 
 test('return path to binary and verify that it is working', async t => {