Gem Load Error on Heroku review app

[sianglim]

Hi @sighmon,

I'm having an issue when deploying a branch to Heroku's review apps.

The key errors I see are:
Bundler::GemRequireError: There was an error while trying to load the gem 'mjml-rails'
Gem Load Error is: undefined method chomp' for nil:NilClass NoMethodError: undefined method chomp' for nil:NilClass /tmp/.../.../vendor/bundle/ruby/2.1.0/gems/mjml-rails-2.4.1/lib/mjml.rb:25:in discover_mjml_bin'

I've set heroku to run the nodejs buildpack first.

On the CI platform, I have npm install as the first build instruction, but it feels like it's not triggering it. The strange thing is that it works on production.

Hope you can point out where I'm going wrong. 😃

[sighmon]

@sianglim Are you sure npm is installing okay? Because npm bin is returning nil, which is why chomp is failing. So perhaps try some logging to see if any basic npm commands are running.

[sianglim]

Thanks for taking the time to look into this @sighmon.

It turns out that heroku's app.json didn't have the nodejs buildpack added.