DevTools: visualize dependencies using jquery.graphviz.svg

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

 "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', 'modules.js');
+const OUT_DIR_PATH = path.resolve(__dirname, 'out');
+const OUT_FILE_PATH = path.resolve(OUT_DIR_PATH, 'modules.js');
 
 function main() {
+  if (!utils.isDir(OUT_DIR_PATH))
+    fs.mkdirSync(OUT_DIR_PATH);
   const modules = new Set();
   const moduleToDependencyList = [];
   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;
       modules.add(module);
       const moduleJSON = require(moduleJSONPath);
       if (moduleJSON.dependencies) {
         for (let d of moduleJSON.dependencies) {
           moduleToDependencyList.push([module, d]);
         }
       }
     }
   });
   const nodes = Array.from(modules);
-  fs.writeFileSync(OUT, `var modules = ${JSON.stringify(moduleToDependencyList)}; var nodes = ${JSON.stringify(nodes)};`);
+  fs.writeFileSync(OUT_FILE_PATH, `var modules = ${JSON.stringify(moduleToDependencyList)}; var nodes = ${JSON.stringify(nodes)};`);
 }
 
 if (require.main === module)
   main();