fixes issue yiwang#2 - issue with really large json files

Author: dwabyick

bin/json2htmlcov

@@ -18,10 +18,17 @@ var str = fs.readFileSync(file, 'utf8');
 var fn = jade.compile(str, { filename: file });
 
 // Read JSON from stdin
-var cov = JSON.parse(fs.readFileSync('/dev/stdin').toString());
+var chunks = [];
+process.stdin
+    .on("data", function(chunk) { chunks.push(chunk); })
+    .on("end",  convertInput)
+    .setEncoding("utf8");
 
-// Dump HTML
-process.stdout.write(fn({
-    cov: cov,
-    coverageClass: coverageClass
-}));
+// Callback to do our conversion    
+function convertInput() {
+    var cov = JSON.parse(chunks.join(""));
+    process.stdout.write(fn({
+        cov: cov,
+        coverageClass: coverageClass
+    }));
+}