** (CaseClauseError) no case clause matching: :eacces - Building release with MIX_ENV=prod

Question

I am not sure where to put that error, elixir, phoenixframework, or nodejs.

I am trying to create my first release build with elxir and phoenix. During the release build I see the following error. I am just not sure if this is a version/dependency problem or something that has to do with nodejs since the only information I could find related to eacces was in relationship with nodejs. Is there anything I am missing in my configuration?

Here is the error stack:

Building release with MIX_ENV=prod.
** (CaseClauseError) no case clause matching: :eacces
lib/exrm/utils/utils.ex:110: ReleaseManager.Utils.relx/5
lib/mix/tasks/release.ex:341: anonymous fn/4 in   Mix.Tasks.Release.do_release/1
lib/ex_unit/capture_io.ex:146: ExUnit.CaptureIO.do_capture_io/2
lib/ex_unit/capture_io.ex:119: ExUnit.CaptureIO.do_capture_io/3
lib/mix/tasks/release.ex:340: Mix.Tasks.Release.do_release/1
lib/mix/tasks/release.ex:78: Mix.Tasks.Release.do_run/1
(mix) lib/mix/task.ex:296: Mix.Task.run_task/3
(mix) lib/mix/cli.ex:58: Mix.CLI.run_task/2

My environment is as follows:

$ elixir -v
Erlang/OTP 19 [erts-8.1] [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

Elixir 1.3.4

$ npm --version
3.10.8

I run in a few version problems after adding exrm which I solved by adding to my dependencies the following:

 {:exrm, git: "git://github.com/bitwalker/exrm.git"},
 {:relx, github: "erlware/relx", override: true},
 {:erlware_commons, github: "erlware/erlware_commons", override: true},
 {:cf, "~> 0.2.1", override: true}

Three hours later...

I have created a fresh phoenix project using mix and could reproduce the problem. Once I added exrm I got the same error. I switchen then to distillery to see the same error. I created an issue on distillery with the hope to get there a solution. Issue 142 on distillery

---

EDIT:

Additional details on this issue from the distillery report:

$ uname -a Darwin Andreass-MBP. 16.1.0 Darwin Kernel Version 16.1.0: Thu Oct 13 21:26:57 PDT 2016; root:xnu-3789.21.3~60/RELEASE_X86_64 x86_64

I am at least four levels deep in a development tree that is fully owned by my account, under my home folder.

Answer 1

TL;DR

This error is caused by a permission denied when attempt to write some artifact of build. You need to override EXRM with distilery and check files/directory permissions.

Long explanation

Error eacces means permission denied in Unix systems, ie, when your release task was attempting to write some builded file, this receives a permission denied from OS.

The CaseClauseError indicates that possibilty is not handled by case clausule in EXRM source code.

Anyway, EXRM was deprecated, and you need overide it with distillery