Add is-installed-globally for auto-detection (#114)

index.js

@@ -9,6 +9,7 @@ const chalk = importLazy('chalk');
 const semverDiff = importLazy('semver-diff');
 const latestVersion = importLazy('latest-version');
 const isNpm = importLazy('is-npm');
+const isInstalledGlobally = importLazy('is-installed-globally');
 const boxen = importLazy('boxen');
 const xdgBasedir = importLazy('xdg-basedir');
 const ONE_DAY = 1000 * 60 * 60 * 24;
@@ -109,7 +110,7 @@ class UpdateNotifier {
 			return this;
 		}
 
-		opts = Object.assign({isGlobal: true}, opts);
+		opts = Object.assign({isGlobal: isInstalledGlobally()}, opts);
 
 		opts.message = opts.message || 'Update available ' + chalk().dim(this.update.current) + chalk().reset(' → ') +
 			chalk().green(this.update.latest) + ' \nRun ' + chalk().cyan('npm i ' + (opts.isGlobal ? '-g ' : '') + this.packageName) + ' to update';

package.json

@@ -37,6 +37,7 @@
     "chalk": "^2.0.1",
     "configstore": "^3.0.0",
     "import-lazy": "^2.1.0",
+    "is-installed-globally": "^0.1.0",
     "is-npm": "^1.0.0",
     "latest-version": "^3.0.0",
     "semver-diff": "^2.0.0",

test/notify.js

@@ -43,7 +43,7 @@ test.afterEach(() => {
 
 test('use pretty boxen message by default', t => {
 	const notifier = new Control();
-	notifier.notify({defer: false});
+	notifier.notify({defer: false, isGlobal: true});
 
 	t.is(stripAnsi(errorLogs), `