Make cache download windows friendly

Author: IvanGoncharov

package.json

@@ -42,7 +42,7 @@
     "cover": "babel-node node_modules/.bin/isparta cover --root src --report html node_modules/.bin/_mocha -- $npm_package_options_mocha",
     "coveralls": "babel-node node_modules/.bin/isparta cover --root src --report lcovonly node_modules/.bin/_mocha -- $npm_package_options_mocha && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
     "build": "npm run download && npm run build-public",
-    "download": "sh scripts/download",
+    "download": "babel-node src/api/cachedData/downloadCache.js src/api/cachedData/cache.json",
     "build-public": "scripts/build-public",
     "deploy": "scripts/build-public && scripts/deploy-public",
     "pretty": "node scripts/pretty.js",

scripts/download

@@ -1,6 +1,7 @@
 /* eslint-disable no-sync */
 
 import { URL } from 'url';
+import { existsSync, writeFileSync } from 'fs';
 import fetch from 'isomorphic-fetch';
 
 /**
@@ -46,11 +47,24 @@ async function cacheResource(resourseName) {
   } while (url !== null);
 }
 
-Promise.all(resources.map(cacheResource))
-  .then(() => {
-    console.log(JSON.stringify(cache, null, 2));
-  })
-  .catch(function(err) {
-    console.error(err);
-  });
+const outfile = process.argv[2];
+if (!outfile) {
+  console.error('Missing ouput file!');
+  process.exit(1);
+}
+
+if (!existsSync(outfile)) {
+  console.log('Downloading cache...');
+
+  Promise.all(resources.map(cacheResource))
+    .then(() => {
+      const data = JSON.stringify(cache, null, 2);
+      writeFileSync(outfile, data, 'utf-8');
+      console.log('Cached!');
+    })
+    .catch(function(err) {
+      console.error(err);
+      process.exit(1);
+    });
+}
 /* eslint-enable no-console */