DevTools: visualize dependencies using jquery.graphviz.svg

third_party/WebKit/Source/devtools/scripts/visualize_deps/generate_dot.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 "use strict";
 
 const fs = require('fs');
 const path = require('path');
 
 const utils = require('../utils');
 
 const FRONTEND_PATH = path.resolve(__dirname, '..', '..', 'front_end');
-const OUT = path.resolve(__dirname, 'out', 'dependencies.dot');
+const OUT_DIR_PATH = path.resolve(__dirname, 'out');
+const OUT_FILE_PATH = path.resolve(OUT_DIR_PATH, 'dependencies.dot');
 
 function main() {
+  if (!utils.isDir(OUT_DIR_PATH))
+    fs.mkdirSync(OUT_DIR_PATH);
   const modules = new Set();
   const moduleToDependencyList = ['digraph dependencies {'];
   moduleToDependencyList.push('fixedsize = true;')
   fs.readdirSync(FRONTEND_PATH).forEach(function(file) {
     const moduleJSONPath = path.join(FRONTEND_PATH, file, 'module.json');
     if (fs.statSync(path.join(FRONTEND_PATH, file)).isDirectory() &&
       utils.isFile(moduleJSONPath)) {
       const module = file;
       if (module === 'audits2_worker')
         return;
@@ skipping 16 matching lines @@
 
       if (moduleJSON.dependencies) {
         for (let d of moduleJSON.dependencies) {
           moduleToDependencyList.push(`  ${module} -> ${d}`);
         }
       }
     }
   });
   moduleToDependencyList.push('}');
   const content = moduleToDependencyList.join('\n');
-  fs.writeFileSync(OUT, content);
+  fs.writeFileSync(OUT_FILE_PATH, content);
 }
 
 if (require.main === module)
   main();