Truffle の Migration は何をやっている？ ref: https://qiita.com/blueplanet/items/e3f5590c9711df4d4845

file0.txt

deployer.deploy(A);
deployer.deploy(B);

file1.txt

deployer.deploy(A).then(function() {
  return deployer.deploy(B, A.address);
});

file2.txt

module.exports = function(deployer, network) {
  // 正式ネットワーク以外の場合、デモデータ導入する
  if (network != "live") {
    deployer.exec("add_demo_data.js");
  }
}

file3.txt

deployer.deploy(A, arg1, arg2, ...);

file4.txt

deployer.deploy([
  [A, arg1, arg2, ...],
  B,
  [C, arg1]
]);

file5.txt

pragma solidity ^0.4.17;

contract Migrations {
  address public owner;
  uint public last_completed_migration;

  modifier restricted() {
    if (msg.sender == owner) _;
  }

  function Migrations() public {
    owner = msg.sender;
  }

  function setCompleted(uint completed) public restricted {
    last_completed_migration = completed;
  }

  function upgrade(address new_address) public restricted {
    Migrations upgraded = Migrations(new_address);
    upgraded.setCompleted(last_completed_migration);
  }
}

file6.txt

var old_contract = eth.contract(abi).at(address1)
old_contract.upgrade.sendTransaction(address2)