chore(lint): enable semicolon and variable-name tslint checks

gulpfile.js

@@ -11,11 +11,11 @@ const path = require('path');
 
 const srcsToFmt = ['tools/**/*.ts'];
 
-gulp.task('lint', () => {
+gulp.task('format:enforce', () => {
   const format = require('gulp-clang-format');
   const clangFormat = require('clang-format');
   return gulp.src(srcsToFmt).pipe(
-      format.checkFormat('file', clangFormat, {verbose: true, fail: true}));
+    format.checkFormat('file', clangFormat, {verbose: true, fail: true}));
 });
 
 gulp.task('format', () => {
@@ -25,6 +25,20 @@ gulp.task('format', () => {
     format.format('file', clangFormat)).pipe(gulp.dest('.'));
 });
 
+gulp.task('lint', ['format:enforce', 'tools:build'], () => {
+  const tslint = require('gulp-tslint');
+  // Built-in rules are at
+  // https://github.com/palantir/tslint#supported-rules
+  const tslintConfig = require('./tslint.json');
+  return gulp.src(['modules/@angular/**/*.ts', '!modules/@angular/*/test/**'])
+    .pipe(tslint({
+      tslint: require('tslint').default,
+      configuration: tslintConfig,
+      rulesDirectory: 'dist/tools/tslint'
+    }))
+    .pipe(tslint.report('prose', {emitError: true}));
+});
+
 gulp.task('tools:build', (done) => { tsc('tools/', done); });