script for keeping tern repository updated by using metadataurl property...

core/tern.core/metadata/_update-tern-repository.js

@@ -0,0 +1,72 @@
+/**
+ * Read '_metadata-repository.json'
+ * and replace every entry with new by reading the latest info from `metadataurl` (if present). 
+ * If there is no `metadataurl` in the new entry, then keep older value
+ * (This allows an older plugin to redirect to new location).
+ * '_metadata-repository.json' file is only saved if and when all requested json files are received and parsed. 
+ * 
+ * before running do `npm i request`
+ * that will be install into ../node_modules
+ * 
+ * @author Paul Verest 
+ */
+
+var repositoryFile = '_metadata-repository.json';
+
+var fs = require('fs');
+var request = require('request');
+
+var ternRepository = require('./'+repositoryFile);
+
+var counter = 0;
+var requestCount = 0;
+var responseCount = 0;
+
+var requestedAllEntries = false;
+
+var saveRepositoryJsonFile = function(){
+	console.log(''+requestCount+' requests, '+responseCount+' responses');
+	if (!requestedAllEntries){
+		// unlikely situation when some response comes before cycle finishes
+		return;
+	}
+	if (requestCount > responseCount){
+		// not all responses yet came
+		return;
+	}
+
+	fs.writeFileSync('./'+repositoryFile, JSON.stringify(ternRepository,null,2) );
+	console.log('Finished processing '+counter+' entries. '+repositoryFile+' file is updated.');
+};
+
+for (var i in ternRepository){
+	var entry = ternRepository[i];
+	counter++;
+	console.log(entry);
+
+	if (!entry.metadataurl){
+		continue;
+	}
+
+	(function closure(i, metadataurl) { //closure
+		requestCount++;
+		request.get(entry.metadataurl, function onResponse(error, response, body) {
+		    if (!error && response.statusCode == 200) {
+		    	console.log('updating entry '+i+' with');
+		    	console.log(body);
+		    	var entry = JSON.parse(body);
+		    	if (!entry.metadataurl){
+		    		entry.metadataurl = metadataurl;		    		
+		    	}
+		    	ternRepository[i] = entry;
+		    	responseCount++;
+		    	saveRepositoryJsonFile(); 
+		    	// we don't know what response will come the last
+		    	// at that point we are to save file
+		    }
+		});
+	})(i, entry.metadataurl);
+};
+
+requestedAllEntries = true;
+saveRepositoryJsonFile();