Cannot get it working?

[vans163]

Using elixir I added :cpg to applications in the mix. Tried both with just calling :reltool_util.application_start(:cpg), and having it in applications and calling.

:application.which_applications()
[...
 {:cpg, 'CloudI Process Groups', '1.5.1'}
]

I then try

iex(dev@1.1.1.1)4> :cpg.which_groups                
** (exit) exited in: :gen_server.call(:cpg_default_scope, :which_groups)
    ** (EXIT) no process
    (stdlib) gen_server.erl:204: :gen_server.call/2

[Michael Truog]

The same sequence works for me in the Erlang shell:

1> reltool_util:application_start(cpg).
ok
2> cpg:which_groups().
[]
3> application:get_all_env(cpg).
[{group_storage,trie},
 {scope,[cpg_default_scope,groups_scope1,groups_scope2]},
 {included_applications,[]},
 {node_type,visible}]

You should check what it says for env when you attempt to run it. Also, start sasl before attempting that sequence to make sure nothing is crashing. Erlang/OTP and Elixir version information would help make it clearer what you are testing.

[vans163]

Okay so this is what I am doing. Elixir 1.2.6, Erlang R18.3

mix new cpgtest
#mix.exs
  defp deps do
    [{:cpg, github: "okeuday/cpg"}]
  end
mix deps.get
mix deps.compile
iex -S mix

> :reltool_util.application_start(:cpg)
:ok
> :application.get_all_env(:cpg)       
[included_applications: []]
> :cpg.which_groups()
** (exit) exited in: :gen_server.call(:cpg_default_scope, :which_groups)
    ** (EXIT) no process
    (stdlib) gen_server.erl:204: :gen_server.call/2

[Michael Truog]

Works fine for the versions you are using (Elixir 1.2.6 with Erlang/OTP 18.3):

$ iex -pz deps/trie/ebin -pz deps/reltool_util/ebin -pz deps/quickrand/ebin -pz ebin
Erlang/OTP 18 [erts-7.3] [source] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:10] [kernel-poll:false]

Interactive Elixir (1.2.6) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)> :reltool_util.application_start(:cpg)
:ok
iex(2)> :cpg.which_groups()
[]

I used rebar2 to compile cpg and test it in the repository, so this may be a problem using mix.

[vans163]

Ah. Is elixirs mix supported then? I just see the mix.exs included in the repo and automatically assume it is. I am not sure how to build the project using rebar2 when elixir wants you to use mix. For example building it separately using rebar2 then doing a mix deps.update/clean then manually using rebar2 again is not a comfortable solution.

[Michael Truog]

@vans163 The cpg application fields needed to be in the mix config when using mix to build. I added the extra values there and now it works fine.

[vans163]

Awesome.