Documentation improvements

[dennisreimann]

The first examples include the import, the latter two don't. I also made the examples a bit clearer and moved asset compiling to the before mix phoenix.digest hook.

[jbranchaud]

This looks great. Thanks! ❤️ 💚 💙 💛 💜

[1zaak]

Excellent work documenting this @dennisreimann. I was following the steps but stumbled on the last one. sudo mix gatling.deploy keeps getting this error:

** (FunctionClauseError) no function clause matching in Mix.Tasks.Gatling.Deploy.run/1
    lib/gatling/tasks/deploy.ex:19: Mix.Tasks.Gatling.Deploy.run([])
    (mix) lib/mix/task.ex:294: Mix.Task.run_task/3
    (mix) lib/mix/cli.ex:58: Mix.CLI.run_task/2
    (elixir) lib/code.ex:370: Code.require_file/2

Any idea what is the problem? Thanks.

[dennisreimann]

@1zaak sorry, I forget the project name as an argument in my article. The README here has it correct – sudo mix gatling.deploy myapp.

[1zaak]

Ah, thanks @dennisreimann. But now i'm getting this error after running sudo --preserve-env mix gatling.deploy msqhportal:

Cannot add file sys.config to tar file - [{error,{13,erl_parse,["syntax error before: ",["Fun"]]}}]
==> Problem generating release tarball:
    {:tar_generation_error, :unknown}
** (File.CopyError) could not copy from "/home/izaak/msqhportal/rel/msqhportal/releases/0.2.0/msqhportal.tar.gz" to "/home/izaak/deployments/msqhportal/msqhportal.tar.gz": no such file or directory

I didn't put all the steps I did up to this point because my guess is this is a fairly known issue, but I could be wrong. Anyway, any ideas?

[dennisreimann]

I haven't come across this and it looks like there is a problem creating the release. Does it work locally? And does the same error come up when you run the commands manually on the production machine?

mix release.init
mix release --warnings-as-errors --env=prod

[1zaak]

Yup both local and production is throwing this error:

Cannot add file sys.config to tar file - [{error,{13,erl_parse,["syntax error before: ",["Fun"]]}}]
==> Problem generating release tarball:
    {:tar_generation_error, :unknown}

[dennisreimann]

Then I think this isn't Gatling related and might be an app specific problem. Did you run through all of the necessary Distillery setup steps?