0.7.0, gems in user install not showing up:

[btm]

@jaym, something is having a hard time with backslashes. I found this debugging #411

From chef gem env:

  - GEM PATHS:
     - C:/opscode/chefdk/embedded/lib/ruby/gems/2.1.0
     - C:\Users\btm_000\AppData\Local/chefdk/gem/ruby/2.1.0

If we change C:/opscode/chefdk/embedded/lib/ruby/site_ruby/2.1.0/rubygems/defaults/operating_system.rb as below, this fixes chef gem list and chef exec knife windows cert generate for the circumstance where knife doesn't find the gem in the user-install directory.

$ diff chefdk/embedded/lib/ruby/site_ruby/2.1.0/rubygems/defaults/operating_system.rb ~/src/omnibus-chef/files/rubygems-custom ization/windows/operating_system.rb
27c27
<                      File.join(ENV['LOCALAPPDATA'], 'chefdk').gsub(/\\/, '/')

---
>                      File.join(ENV['LOCALAPPDATA'], 'chefdk')

I'm suspecting the rubygems try_activate error is related but you have to have a ~/.chefdk directory to repro it, which I've deleted during this testing process. I'm going to recreate it and go back for another test run now.

---

Repro output for fix below:

# install chefdk 0.7 nightly
PS C:\Users\btm_000> chef gem list knife-windows

*** LOCAL GEMS ***

knife-windows (0.8.5)
PS C:\Users\btm_000> chef gem install knife-windows -v 1.0.0.rc.1
Fetching: winrm-s-0.3.0.gem (100%)
WARNING:  You don't have c:\users\btm_000\appdata\local\chefdk\gem\ruby\2.1.0\bin in your PATH,
          gem executables will not run.
Successfully installed winrm-s-0.3.0
Fetching: knife-windows-1.0.0.rc.1.gem (100%)
Successfully installed knife-windows-1.0.0.rc.1
Parsing documentation for winrm-s-0.3.0
Installing ri documentation for winrm-s-0.3.0
Parsing documentation for knife-windows-1.0.0.rc.1
Installing ri documentation for knife-windows-1.0.0.rc.1
Done installing documentation for winrm-s, knife-windows after 1 seconds
2 gems installed
PS C:\Users\btm_000> chef gem list knife-windows

*** LOCAL GEMS ***

knife-windows (0.8.5)
PS C:\Users\btm_000> chef gem uninstall knife-windows -v 0.8.5
Successfully uninstalled knife-windows-0.8.5
PS C:\Users\btm_000> chef gem list knife-windows

*** LOCAL GEMS ***


###
### patch C:/opscode/chefdk/embedded/lib/ruby/site_ruby/2.1.0/rubygems/defaults/operating_system.rb
###
PS C:\Users\btm_000> chef gem list knife-windows

*** LOCAL GEMS ***

knife-windows (1.0.0.rc.1)