Navigating a project's contracts directory with Finder on OSX creates a .DS_Store file which truffle tries to compile, resulting in an error.

[ramvi]

$ truffle deploy
Using environment development.
Compiling ./contracts/.DS_Store...
/usr/local/lib/node_modules/truffle/node_modules/solc/bin/soljson-latest.js:1
(function (exports, require, module, __filename, __dirname) { var Module;if(!Module)Module=(typeof Module!=="undefined"?Module:null)||{};var moduleOverrides={};for(var key in Module){if(Module.hasOwnProperty(key)){moduleOverrides[key]=Module[key]}}var ENVIRONMENT_IS_WEB=typeof window==="object";var ENVIRONMENT_IS_WORKER=typeof importScripts==="function";var ENVIRONMENT_IS_NODE=typeof process==="object"&&typeof require==="function"&&!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_WORKER;var ENVIRONMENT_IS_SHELL=!ENVIRONMENT_IS_WEB&&!ENVIRONMENT_IS_NODE&&!ENVIRONMENT_IS_WORKER;if(ENVIRONMENT_IS_NODE){if(!Module["print"])Module["print"]=function print(x){process["stdout"].write(x+"\n")};if(!Module["printErr"])Module["printErr"]=function printErr(x){process["stderr"].write(x+"\n")};var nodeFS=require("fs");var nodePath=require("path");Module["read"]=function read(filename,binary){filename=nodePath["normalize"](filename);var ret=nodeFS["readFileS

TypeError: Cannot read property 'bytecode' of undefined
  at /usr/local/lib/node_modules/truffle/lib/contracts.es6:171:45
  at /usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:356:13
  at iterate (/usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:262:13)
  at async.forEachOfSeries.async.eachOfSeries (/usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:281:9)
  at _asyncMap (/usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:355:9)
  at Object.mapSeries (/usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:347:20)
  at Object.compile_all (/usr/local/lib/node_modules/truffle/lib/contracts.es6:144:11)
  at /usr/local/lib/node_modules/truffle/lib/contracts.es6:230:16
  at /usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:713:13
  at iterate (/usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:262:13)
  at /usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:274:29
  at /usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:44:16
  at /usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:718:17
  at /usr/local/lib/node_modules/truffle/node_modules/async/lib/async.js:167:37
  at /usr/local/lib/node_modules/truffle/lib/contracts.es6:226:9
  at /usr/local/lib/node_modules/truffle/node_modules/web3/lib/web3/property.js:118:13
  at /usr/local/lib/node_modules/truffle/node_modules/web3/lib/web3/requestmanager.js:89:9
  at [object Object].request.onreadystatechange (/usr/local/lib/node_modules/truffle/node_modules/web3/lib/web3/httpprovider.js:114:13)
  at [object Object].dispatchEvent (/usr/local/lib/node_modules/truffle/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:591:25)
  at setState (/usr/local/lib/node_modules/truffle/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:610:14)
  at IncomingMessage.<anonymous> (/usr/local/lib/node_modules/truffle/node_modules/xmlhttprequest/lib/XMLHttpRequest.js:447:13)
  at emitNone (events.js:72:20)
  at IncomingMessage.emit (events.js:166:7)
  at endReadableNT (_stream_readable.js:905:12)
  at doNTCallback2 (node.js:450:9)
  at process._tickDomainCallback (node.js:405:17)
  at Function.module.exports.loopWhile (/usr/local/lib/node_modules/truffle/node_modules/deasync/index.js:64:21)
  at /usr/local/lib/node_modules/truffle/node_modules/deasync/index.js:36:18
  at runTask (/usr/local/lib/node_modules/truffle/truffle.es6:55:5)
  at Object.<anonymous> (/usr/local/lib/node_modules/truffle/truffle.es6:347:14)
  at Module._compile (module.js:425:26)
  at normalLoader (/usr/local/lib/node_modules/truffle/node_modules/babel-core/lib/api/register/node.js:199:5)
  at Object.require.extensions.(anonymous function) [as .es6] (/usr/local/lib/node_modules/truffle/node_modules/babel-core/lib/api/register/node.js:216:7)
  at Module.load (module.js:356:32)
  at Function.Module._load (module.js:311:12)
  at Function.Module.runMain (module.js:457:10)
  at Object.<anonymous> (/usr/local/lib/node_modules/truffle/node_modules/babel/lib/_babel-node.js:144:25)
  at Module._compile (module.js:425:26)
  at Object.Module._extensions..js (module.js:432:10)
  at Module.load (module.js:356:32)
  at Function.Module._load (module.js:311:12)
  at Function.Module.runMain (module.js:457:10)
  at startup (node.js:136:18)
  at node.js:972:3

A check (no hidden files?) should be added to lib/contracts.es6 line 122.

[tom-seddon]

This also happens with temporary emacs files. Skipping hidden files (hidden by the Unix-style rules, that is - i.e., name starts with .) would fix this too.

--Tom

[JackPickering]

Go to the directory you wish to check i.e. ./contracts/ in the command line

Run ls -la - this will list all files (including hidden ones)

Then run rm .DS_Store which will remove any such files

[JackPickering]

Its likely that DS_Store will have copied into various directories as well so go through and check each one using ls -la.

[cgewecke]

Closing in favor of #684, which is more recent (Nov 15, 2017) and refers to version 3.4.11.