Merge pull request #156 from ethereum/download-cleanup

Some cleanups in the download scripts

Author: axic

downloadCurrentVersion.js

@@ -28,6 +28,17 @@ function getVersionList (cb) {
 function downloadBinary (outputName, version, expectedHash) {
   console.log('Downloading version', version);
 
+  // Remove if existing
+  if (fs.existsSync(outputName)) {
+    fs.unlinkSync(outputName);
+  }
+
+  process.on('SIGINT', function () {
+    console.log('Interrupted, removing file.');
+    fs.unlinkSync(outputName);
+    process.exit(1);
+  });
+
   var file = fs.createWriteStream(outputName, { encoding: 'binary' });
   https.get('https://ethereum.github.io/solc-bin/bin/' + version, function (response) {
     if (response.statusCode !== 200) {