Install required dependencies based on .worker file

[iron-io]

Install required dependencies based on .worker file

[iced]

Don't really think we need to do this. E.g. for ruby gems it'll be very messy (the only way will be to generate Gemfile and feed it to bundler, which can mess with user's environment).

[treeder]

It could maybe just check if gem exists on machine and do gem install if doesn't. I run into this a lot and the only way to figure it out is to read the .worker file and install them manually anyways or keep doing upload and installing the gem it errors on (the more likely way when asking someone to try an example) until it works.

[romand]

% iron_worker install tst       
------> Detecting worker dependencies
        Found workerfile with path='tst.worker'
        Adding ruby gem dependency with name='pry' and version='>= 0'
        Detected ruby exec with path='tst.rb'
        Fixating gems dependencies
        Merging ruby gem with name='coderay' and version='1.0.7'
        Merging ruby gem with name='method_source' and version='0.8'
        Merging ruby gem with name='slop' and version='3.3.2'
        Merging ruby gem with name='pry' and version='0.9.10'
------> Installing gems
        coderay (1.0.7) installed
        method_source (0.8) installed
        slop (3.3.2) installed
        pry (0.9.10) installed

[romand]

@treeder looks good?
@iced any objections on implementation?

[treeder]

Nice!

[romand]

f1a1d8e

• fixes double gem install
• gems from merge_gemfile are not installed now -- bug

[iced]

implemented long time ago

[romand]

• it doesn't complain if worker file is missing
• it doesn't install merge_gemfile gems

IMHO it is premature to close this

[iced]

We can't resolve gemfiles without gems installed. Send "thank you" letter to rubygems devs. Closing.

[treeder]

Does it install gems from merged gemfile?

[romand]

not for me

~/iw
% cat tst.worker 
gemfile 'tst.gemfile'
exec 'test/hello.rb'
~/iw
% cat tst.gemfile
source "https://rubygems.org"

gem 'to_nil'
~/iw
% iron_worker install tst
------> Installing dependencies for code package with name='tst'
        Found workerfile with path='tst.worker'
        Adding ruby gems dependencies from default group of tst.gemfile
/home/romand/.rvm/gems/ruby-1.9.3-p194@iron_worker_ng/gems/iron_worker_ng-0.12.0/lib/iron_worker_ng/code/base.rb:75:in `eval': Could not find gem 'to_nil (>= 0) ruby' in the gems available on this machine. (Bundler::GemNotFound)

also it doesn't complain if worker file is missing

~/iw
% ruby -Ilib bin/iron_worker install kruplumpl
------> Installing dependencies for code package with name='kruplumpl'