old_contents: var shelljs = require('shelljs');
  var shelljs_global = require('shelljs/global');
  var web3 = require('web3');
  var fs = require('fs');
  var solc = require('solc');
  
  Compiler = function(blockchainConfig) {
    this.blockchainConfig = blockchainConfig;
  };
  
  Compiler.prototype.init = function(env) {
    var config = this.blockchainConfig.config(env);
  };
  
  Compiler.prototype.compile_solidity = function(contractFile) {
    var cmd, result, output, version, json, compiled_object;
  
    cmd = "solc " + contractFile + " --combined-json bin,abi";
  
    result = exec(cmd, {silent: true});
    output = result.output;
  
    json = JSON.parse(output).contracts;
  
     compiled_object = {}
   
     for (var className in json) {
       var contract = json[className];
   
       compiled_object[className] = {};
       compiled_object[className].code = contract.binary || contract.bin;
       compiled_object[className].info = {};
       compiled_object[className].info.abiDefinition = JSON.parse(contract["abi"] || contract["json-abi"]);
     }
  
    return compiled_object;
  };
  
  Compiler.prototype.compile_serpent = function(contractFile) {
    var cmd, result, output, json, compiled_object;
  
    cmd = "serpent compile " + contractFile;
  
    result = exec(cmd, {silent: true});
    code = result.output;
  
    if (result.code === 1) {
      throw new Error(result.output);
    }
  
    cmd = "serpent mk_full_signature " + contractFile;
    result = exec(cmd, {silent: true});
  
    if (result.code === 1) {
      throw new Error(result.output);
    }
  
    json = JSON.parse(result.output.trim());
    className = contractFile.split('.')[0].split("/").pop();
  
    for (var i=0; i < json.length; i++) {
      var elem = json[i];
  
      if (elem.outputs.length > 0) {
        elem.constant = true;
      }
    }
  
    compiled_object = {}
    compiled_object[className] = {};
    compiled_object[className].code = code.trim();
    compiled_object[className].info = {};
    compiled_object[className].info.abiDefinition = json;
  
    return compiled_object;
  }
  
  
  Compiler.prototype.compile = function(contractFile) {
    var extension = contractFile.split('.')[1];
  
    if (extension === 'sol') {
      return this.compile_solidity(contractFile);
    }
    else if (extension === 'se') {
      return this.compile_serpent(contractFile);
    }
    else {
      throw new Error("extension not known");
    }
  };
  
  module.exports = Compiler;
  
new_contents: var shelljs = require('shelljs');
  var shelljs_global = require('shelljs/global');
  var web3 = require('web3');
  
  
  Compiler = function(blockchainConfig) {
    this.blockchainConfig = blockchainConfig;
  };
  
  Compiler.prototype.init = function(env) {
    var config = this.blockchainConfig.config(env);
  };
  
  Compiler.prototype.compile_solidity = function(contractFile) {
    var cmd, result, output, version, json, compiled_object;
  
    cmd = "solc " + contractFile + " --combined-json bin,abi";
  
    result = exec(cmd, {silent: true});
    output = result.output;
  
    json = JSON.parse(output).contracts;
  
     compiled_object = {}
   
     for (var className in json) {
       var contract = json[className];
   
       compiled_object[className] = {};
       compiled_object[className].code = contract.binary || contract.bin;
       compiled_object[className].info = {};
       compiled_object[className].info.abiDefinition = JSON.parse(contract["abi"] || contract["json-abi"]);
     }
  
    return compiled_object;
  };
  
  Compiler.prototype.compile_serpent = function(contractFile) {
    var cmd, result, output, json, compiled_object;
  
    cmd = "serpent compile " + contractFile;
  
    result = exec(cmd, {silent: true});
    code = result.output;
  
    if (result.code === 1) {
      throw new Error(result.output);
    }
  
    cmd = "serpent mk_full_signature " + contractFile;
    result = exec(cmd, {silent: true});
  
    if (result.code === 1) {
      throw new Error(result.output);
    }
  
    json = JSON.parse(result.output.trim());
    className = contractFile.split('.')[0].split("/").pop();
  
    for (var i=0; i < json.length; i++) {
      var elem = json[i];
  
      if (elem.outputs.length > 0) {
        elem.constant = true;
      }
    }
  
    compiled_object = {}
    compiled_object[className] = {};
    compiled_object[className].code = code.trim();
    compiled_object[className].info = {};
    compiled_object[className].info.abiDefinition = json;
  
    return compiled_object;
  }
  
  
  Compiler.prototype.compile = function(contractFile) {
    var extension = contractFile.split('.')[1];
  
    if (extension === 'sol') {
      return this.compile_solidity(contractFile);
    }
    else if (extension === 'se') {
      return this.compile_serpent(contractFile);
    }
    else {
      throw new Error("extension not known");
    }
  };
  
  module.exports = Compiler;
  
subject: Update compiler.js