Adding support for multiple contracts in the same file to be handled correctly

lib/config.es6

@@ -54,6 +54,7 @@ var Config = {
         }
       },
       contracts: {
+        filenames: {},
         classes: {},
         directory: `${working_dir}/contracts`,
         build_directory: null
@@ -215,9 +216,18 @@ var Config = {
       for (file of filesSync(config.contracts.directory)) {
         var name = file.substring(file.lastIndexOf("/") + 1, file.lastIndexOf("."));
         var relative_path = file.replace(config.working_dir, "./");
-        config.contracts.classes[name] = {
+        config.contracts.filenames[name] = {
           source: relative_path
         }
+        var code = fs.readFileSync(file, {encoding: "utf8"});
+        var myRegex = /contract\s([a-zA-Z0-9_\-]+)/g;
+        var match = myRegex.exec(code);
+        while (match != null){
+          config.contracts.classes[match[1]] = {
+            source: "./" + match[1] + ".sol"
+          }
+          match = myRegex.exec(code);
+        }
       }
     }
 

lib/contracts.es6

@@ -115,10 +115,10 @@ var Contracts = {
 
   compile_all(config, callback) {
     var sources = {};
-    var contracts = Object.keys(config.contracts.classes);
+    var contracts = Object.keys(config.contracts.filenames);
     for (var i = 0; i < contracts.length; i++) {
       var key = contracts[i];
-      var contract = config.contracts.classes[key];
+      var contract = config.contracts.filenames[key];
       var source = contract.source.replace("./contracts/", "");
       var full_path = path.resolve(config.working_dir, contract.source)
       sources[source] = fs.readFileSync(full_path, {encoding: "utf8"});
@@ -131,14 +131,14 @@ var Contracts = {
       return;
     }
 
-    var compiled_contract = result.contracts[key];
-
-    for (var i = 0; i < contracts.length; i++) {
-      var key = contracts[i];
-      var contract = config.contracts.classes[key];
-      var compiled_contract = result.contracts[key];
-      contract["binary"] = compiled_contract.bytecode;
-      contract["abi"] = JSON.parse(compiled_contract.interface);
+    for (var contractKey in result.contracts){
+      if(result.contracts.hasOwnProperty(contractKey)){
+        config.contracts.classes[contractKey] = {
+          source: "./" + contractKey + ".sol",
+          binary: result.contracts[contractKey].bytecode,
+          abi: JSON.parse(result.contracts[contractKey].interface)
+        }
+      }
     }
 
     callback();