cp: illegal option -- u

[zeke]

Hi @djblue this looks like an interesting project. I work at npm and used to work at Heroku, so I'm intrigued. :)

cp -u is not a thing on OS X, so I got an error on npm install. I would send a pull request, but I'm not sure if there's an OS X equivalent for the -u flag behavior.

> pnpm@0.0.1 install /Users/z/code/forks/pnpm
> cp -u config.json.template config.json

cp: illegal option -- u
usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file target_file
       cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file ... target_directory

npm ERR! Darwin 13.3.0
npm ERR! argv "node" "/Users/z/.nvm/v0.10.31/bin/npm" "i"
npm ERR! node v0.10.31
npm ERR! npm  v2.1.4
npm ERR! code ELIFECYCLE
npm ERR! pnpm@0.0.1 install: `cp -u config.json.template config.json`
npm ERR! Exit status 64
npm ERR! 
npm ERR! Failed at the pnpm@0.0.1 install script.
npm ERR! This is most likely a problem with the pnpm package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     cp -u config.json.template config.json
npm ERR! You can get their info via:
npm ERR!     npm owner ls pnpm
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/z/code/forks/pnpm/npm-debug.log

[iarna]

To do this on OSX you'd do something like:

[[ config.json.template -nt config.json ]] && cp config.json.template config.json

[zeke]

Would that work nicely on linux too?

[iarna]

Yup, that's just the old school Unix way, instead of this new fangled GNU way with all its fancy options and arguments.

[djblue]

@iarna I tried putting the bash conditional in package.json, npm didn't seem to like it.

So I found a better option -n for cp which might work on OSX. I don't have OSX, so let me know if this works.

@zeke I added a branch osx-cp, can you fetch it and see if that fixes your issue? Thanks for finding this problem.

[zeke]

A PR in progress: https://github.com/djblue/pnpm/pull/3