replace vendor_to_dist shell script with add empty_dist.js and topojson_dist.js to run before build scripts

Author: archmoj

package.json

@@ -21,13 +21,13 @@
     "plotly"
   ],
   "scripts": {
-    "preprocess": "./tasks/vendor_to_dist.sh && node tasks/preprocess.js",
+    "preprocess": "node tasks/preprocess.js",
     "bundle": "node tasks/bundle.js",
     "header-dist": "node tasks/header_dist.js",
     "stats": "node tasks/stats.js",
     "find-strings": "node tasks/find_locale_strings.js",
-    "build": "npm run preprocess && npm run find-strings && npm run bundle && npm run header-dist && npm run stats",
-    "cibuild": "npm run preprocess && node tasks/cibundle.js",
+    "build": "node tasks/empty_dist.js && npm run preprocess && node tasks/topojson_dist.js && npm run find-strings && npm run bundle && npm run header-dist && npm run stats",
+    "cibuild": "node tasks/empty_dist.js && npm run preprocess && node tasks/cibundle.js",
     "watch": "node tasks/watch.js",
     "lint": "eslint --version && eslint .",
     "lint-fix": "eslint . --fix || true",

tasks/empty_dist.js

@@ -0,0 +1,21 @@
+var fs = require('fs-extra');
+var common = require('./util/common');
+var constants = require('./util/constants');
+
+// main
+emptyDist();
+
+function emptyDist() {
+    var dir = constants.pathToDist;
+    if(common.doesDirExist(dir)) {
+        console.log('empty ' + dir);
+        try {
+            fs.rmdirSync(dir, { recursive: true });
+        } catch(err) {
+            console.error(err);
+        }
+
+        // create folder
+        fs.mkdirSync(dir);
+    }
+}

tasks/topojson_dist.js

@@ -0,0 +1,16 @@
+var fs = require('fs-extra');
+var common = require('./util/common');
+var constants = require('./util/constants');
+
+// main
+copyTopojsonFiles();
+
+// copy topojson files from vendor/ to dist/
+function copyTopojsonFiles() {
+    fs.copy(
+        constants.pathToTopojsonVendor,
+        constants.pathToTopojsonDist,
+        { clobber: true },
+        common.throwOnError
+    );
+}