Don't know how to build task 'webpacker:install'

[neonmate]

I saw following error when saying katapult new $APPLICATION_NAME:

       rails  webpacker:install
rails aborted!
Don't know how to build task 'webpacker:install' (see --tasks)
/Users/neonmate/.rvm/gems/ruby-2.4.1/gems/railties-5.1.4/lib/rails/commands/rake/rake_command.rb:21:in `block in perform'
/Users/neonmate/.rvm/gems/ruby-2.4.1/gems/railties-5.1.4/lib/rails/commands/rake/rake_command.rb:18:in `perform'
/Users/neonmate/.rvm/gems/ruby-2.4.1/gems/railties-5.1.4/lib/rails/command.rb:46:in `invoke'
/Users/neonmate/.rvm/gems/ruby-2.4.1/gems/railties-5.1.4/lib/rails/commands.rb:16:in `<top (required)>'
bin/rails:4:in `require'
bin/rails:4:in `<main>'
(See full trace by running task with --trace)

To solve this issue I needed to add a Gemfile with following content:

source 'https://rubygems.org'

gem 'katapult', :git => 'git://github.com/makandra/katapult'
gem 'webpacker', '=3.0'

Afterwards running bundleand bundle exec katapult new $APPLICATION_NAME worked.

[neonmate]

--- a/katapult.gemspec
+++ b/katapult.gemspec
@@ -22,4 +22,5 @@ Gem::Specification.new do |spec|

   spec.add_runtime_dependency 'rails', Katapult::RAILS_VERSION
   spec.add_runtime_dependency 'spring' # speed-up
+  spec.add_runtime_dependency 'webpacker'
 end

This should fix it. Maybe we also want to add a info to the readme that npm + yarn is needed for webpack and has to be installed.

[codener]

Ok, this is weird. webpacker is required by Rails, I don't think katapult needs it. Maybe it is because of a screwed bundler setup, or because of other broken things.

[triskweline]

I think it's an optional dependency. I'm currently working on a Rails 5 app that uses sprockets only, and I don't have webpacker in my bundle.

[codener]

Ok, seems it will be fixed in 0.3.0 (at least, I cannot reproduce it). Closing this for now, please reopen if the issue persists.