add deploy task

tasks/deploy.coffee

@@ -0,0 +1,41 @@
+module.exports = (grunt) ->
+  web3 = require('web3')
+  readYaml = require('read-yaml');
+
+  grunt.registerTask "deploy_contracts", "deploy code", (env)  =>
+    blockchainConfig = readYaml.sync("config/blockchain.yml")
+    rpcHost   = blockchainConfig[env || "development"].rpc_host
+    rpcPort   = blockchainConfig[env || "development"].rpc_port
+
+    try
+      web3.setProvider(new web3.providers.HttpProvider("http://#{rpcHost}:#{rpcPort}"))
+      primaryAddress = web3.eth.coinbase
+      web3.eth.defaultAccount = primaryAddress
+    catch e
+      grunt.log.writeln("==== can't connect to #{rpcHost}:#{rpcPort} check if an ethereum node is running")
+      exit
+
+    grunt.log.writeln("address is : #{primaryAddress}")
+
+    result  = "web3.setProvider(new web3.providers.HttpProvider('http://#{rpcHost}:#{rpcPort}'));"
+    result += "web3.eth.defaultAccount = web3.eth.accounts[0];"
+
+    contractFiles = grunt.file.expand(grunt.config.get("deploy.contracts"))
+    for contractFile in contractFiles
+      source = grunt.file.read(contractFile)
+
+      grunt.log.writeln("deploying #{contractFile}")
+      contract = web3.eth.compile.solidity(source)
+      contractAddress = web3.eth.sendTransaction({from: primaryAddress, data: contract.code})
+      grunt.log.writeln("deployed at #{contractAddress}")
+
+      abi = JSON.stringify(contract.info.abiDefinition)
+      className = source.match(/contract (\w+)(?=\s[is|{])/g)[0].replace("contract ","")
+
+      result += "var #{className}Abi = #{abi};"
+      result += "var #{className}Contract = web3.eth.contract(#{className}Abi);"
+      result += "var #{className} = new #{className}Contract('#{contractAddress}');";
+
+    destFile = grunt.config.get("deploy.dest")
+    grunt.file.write(destFile, result)
+