MOBILE-4616 gulp: Create task to freeze libraries

gulp/task-freeze-dependencies.js

@@ -0,0 +1,78 @@
+// (C) Copyright 2015 Moodle Pty Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+const { readFileSync, writeFile } = require('fs');
+
+/**
+ * Freeze all dependencies versions in package.json using the version declared in package-lock.
+ */
+class FreezeDependenciesTask {
+
+    /**
+     * Run the task.
+     *
+     * @param done Function to call when done.
+     */
+    run(done) {
+        const packageData = JSON.parse(readFileSync('package.json'));
+        const packageLockData = JSON.parse(readFileSync('package-lock.json'));
+
+        this.freezeDependencies(packageLockData, packageData.dependencies);
+        this.freezeDependencies(packageLockData, packageData.devDependencies);
+
+        writeFile('package.json', JSON.stringify(packageData, null, 4), done);
+    }
+
+    /**
+     * Get the version declared in package-lock for a certain dependency.
+     *
+     * @param packageLockData Package-lock data.
+     * @param name Name of the dependency.
+     */
+    getDependencyVersion(packageLockData, name) {
+        const dependency = packageLockData.packages['node_modules/' + name];
+        if (!dependency) {
+            console.error('Dependency not found in package-lock: ' + name);
+            return;
+        }
+        if (!dependency.version) {
+            console.error('Dependency found but version is empty in package-lock: ' + name);
+            return;
+        }
+
+        return dependency.version;
+    }
+
+    /**
+     * Freeze versions of dependencies.
+     *
+     * @param packageLockData Package-lock data.
+     * @param dependencies Object with the dependencies to freeze.
+     */
+    freezeDependencies(packageLockData, dependencies) {
+        for (const name in dependencies) {
+            if (dependencies[name].match(/^[0-9A-Za-z]/)) {
+                // Already fixed, don't change it;
+                continue;
+            }
+
+            const version = this.getDependencyVersion(packageLockData, name);
+            if (version) {
+                dependencies[name] = version;
+            }
+        }
+    }
+}
+
+module.exports = FreezeDependenciesTask;

gulpfile.js

@@ -17,6 +17,7 @@ const BuildBehatPluginTask = require('./gulp/task-build-behat-plugin');
 const BuildEnvTask = require('./gulp/task-build-env');
 const BuildIconsJsonTask = require('./gulp/task-build-icons-json');
 const OverrideLangTask = require('./gulp/task-override-lang');
+const FreezeDependenciesTask = require('./gulp/task-freeze-dependencies');
 const gulp = require('gulp');
 
 const paths = {
@@ -48,6 +49,10 @@ gulp.task('icons', (done) => {
     new BuildIconsJsonTask().run(done);
 });
 
+gulp.task('freeze-dependencies', (done) => {
+    new FreezeDependenciesTask().run(done);
+});
+
 // Build a Moodle plugin to run Behat tests.
 if (BuildBehatPluginTask.isBehatConfigured()) {
     gulp.task('behat', (done) => {