[Rails] Re: There is a difference between "rake" and "bundle exec rake" and I need to understand it.
Tuesday, January 6, 2015
Hi Fred,
On Tuesday, January 6, 2015 9:06:25 AM UTC-8, Frederick Cheung wrote:
Thanks very much for the explanation. Quite clear and now I think I understand to a much higher degree.
Your recollections agree with other sources, so there is something mysterious on my machine, and I'm willing to blame SELinux. I should have dropped SELinux and tested, but it didn't occur to me until I had already solved my problem by "gem install"ing the same version of rake and rack that the bundle had, thereby obviating the version problem -- in this case.
Thanks for the help,
Chris.
-- On Tuesday, January 6, 2015 9:06:25 AM UTC-8, Frederick Cheung wrote:
bundler makes sure only the gems (and the specific versions) listed in Gemfile.lock are loaded which avoids all sorts of dependency based problems. However if you just run `rake`, then the most recent version of rake is run. A few milliseconds boot.rb loads bundler, and if bundler finds that gems have been loaded that don't match the version bundler wants to use then it aborts (since one a gem has been loaded you can't unload it and load a different version)When you run something with bundle exec, it ensures that only the gem versions in your Gemfile.lock are specified.You can use http://mpapis.github.io/rubygems-bundler/ which ensures that the executables installed for rake etc. load bundler first. You can also use the bin stubs in your app's bin folder .
Thanks very much for the explanation. Quite clear and now I think I understand to a much higher degree.
I seem to recall the passenger knows to load bundler if a Gemfile is present - i don't recall ever having to do something specific for this.
Your recollections agree with other sources, so there is something mysterious on my machine, and I'm willing to blame SELinux. I should have dropped SELinux and tested, but it didn't occur to me until I had already solved my problem by "gem install"ing the same version of rake and rack that the bundle had, thereby obviating the version problem -- in this case.
Thanks for the help,
Chris.
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