Add sanity test for package.json

build/gulpfile.hygiene.js

@@ -17,6 +17,7 @@ const vfs = require('vinyl-fs');
 const path = require('path');
 const fs = require('fs');
 const pall = require('p-all');
+const task = require('./lib/task');
 
 /**
  * Hygiene works by creating cascading subsets of all our files and
@@ -205,6 +206,33 @@ gulp.task('tslint', () => {
 	]).pipe(es.through());
 });
 
+function checkPackageJSON(actualPath) {
+	const actual = require(path.join(__dirname, '..', actualPath));
+	const rootPackageJSON = require('../package.json');
+
+	for (let depName in actual.dependencies) {
+		const depVersion = actual.dependencies[depName];
+		const rootDepVersion = rootPackageJSON.dependencies[depName];
+		if (!rootDepVersion) {
+			// missing in root is allowed
+			continue;
+		}
+		if (depVersion !== rootDepVersion) {
+			this.emit('error', `The dependency ${depName} in '${actualPath}' (${depVersion}) is different than in the root package.json (${rootDepVersion})`);
+		}
+	}
+}
+
+const checkPackageJSONTask = task.define('check-package-json', () => {
+	return gulp.src('package.json')
+		.pipe(es.through(function() {
+			checkPackageJSON.call(this, 'remote/package.json');
+			checkPackageJSON.call(this, 'remote/web/package.json');
+		}));
+});
+gulp.task(checkPackageJSONTask);
+
+
 function hygiene(some) {
 	let errorCount = 0;
 
@@ -393,7 +421,7 @@ function createGitIndexVinyls(paths) {
 		.then(r => r.filter(p => !!p));
 }
 
-gulp.task('hygiene', () => hygiene());
+gulp.task('hygiene', task.series(checkPackageJSONTask, () => hygiene()));
 
 // this allows us to run hygiene as a git pre-commit hook
 if (require.main === module) {