inspec compliance version fails with stacktrace if no compliance URL is configured

[stevendanna]

Description

The help output lists inspec compliance version as a possible command:

> inspec help compliance
Commands:
  inspec compliance exec PROFILE    # executes a Chef Compliance profile
  inspec compliance help [COMMAND]  # Describe subcommands or one specific subcommand
  inspec compliance login SERVER    # Log in to a Chef Compliance SERVER
  inspec compliance logout          # user logout from Chef Compliance
  inspec compliance profiles        # list all available profiles in Chef Compliance
  inspec compliance upload PATH     # uploads a local profile to Chef Compliance
  inspec compliance version         # displays the version of the Chef Compliance server

However, by default it will yield a stracktrace:

> inspec compliance version
/Users/sdanna/.chefdk/gem/ruby/2.1.0/gems/inspec-0.29.0/lib/bundles/inspec-compliance/api.rb:47:in `version': undefined method `+' for nil:NilClass (NoMethodError)
        from /Users/sdanna/.chefdk/gem/ruby/2.1.0/gems/inspec-0.29.0/lib/bundles/inspec-compliance/cli.rb:169:in `version'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor/invocation.rb:115:in `invoke'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor.rb:235:in `block in subcommand'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
        from /opt/chefdk/embedded/lib/ruby/gems/2.1.0/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
        from /Users/sdanna/.chefdk/gem/ruby/2.1.0/gems/inspec-0.29.0/bin/inspec:9:in `<top (required)>'
        from /Users/sdanna/.chefdk/gem/ruby/2.1.0/bin/inspec:22:in `load'
        from /Users/sdanna/.chefdk/gem/ruby/2.1.0/bin/inspec:22:in `<main>'

Based on the code it looks like this is likely a result of not having a compliance server in my configuration.

InSpec and Platform Version

0.29.0

Replication Case

inspec compliance version without any compliance server configuration.

Possible Solutions

inspec should exit with a non-zero exit status while printing an informative error.

[chris-rock]

Thanks for highlighting that @stevendanna