[DRE-maint] Bug#964964: ruby-codemirror-rails: ftbfs with rails 6 in experimental and unmainatained.

[Pirate Praveen]

Package: ruby-codemirror-rails
Version: 5.16.0-1
Severity: important
Control: forwarded -1 
https://github.com/fixlr/codemirror-rails/issues/61

User: pkg-ruby-extras-maintainers at lists.alioth.debian.org
Usertags: rails6-transition

Hi,

This package's autopkgtest failed with rails 6 currently in
experimental. rails 6 will be uploaded to unstable in 2 weeks, so
please make sure this package is ready for rails 6. The severity of
this bug will be raised to serious after rails 6 is uploaded to
unstable.

Relevant error

GEM_PATH= ruby2.7 -e gem\ \"codemirror-rails\"
/usr/lib/ruby/2.7.0/rubygems/dependency.rb:313:in `to_specs': Could not 
find 'railties' (< 6.0, >= 3.0) - did find: [railties-6.0.3.1] 
(Gem::MissingSpecVersionError)
Checked in 
'GEM_PATH=/home/debci/.gem/ruby/2.7.0:/var/lib/gems/2.7.0:/usr/lib/ruby/gems/2.7.0:/usr/share/rubygems-integration/2.7.0:/usr/share/rubygems-integration/all:/usr/lib/x86_64-linux-gnu/rubygems-integration/2.7.0', 
execute `gem env` for more information
 from /usr/lib/ruby/2.7.0/rubygems/specification.rb:1402:in `block in 
activate_dependencies'
 from /usr/lib/ruby/2.7.0/rubygems/specification.rb:1391:in `each'
 from /usr/lib/ruby/2.7.0/rubygems/specification.rb:1391:in 
`activate_dependencies'
 from /usr/lib/ruby/2.7.0/rubygems/specification.rb:1373:in `activate'
 from /usr/lib/ruby/2.7.0/rubygems/core_ext/kernel_gem.rb:68:in `block 
in gem'
 from /usr/lib/ruby/2.7.0/rubygems/core_ext/kernel_gem.rb:68:in 
`synchronize'
 from /usr/lib/ruby/2.7.0/rubygems/core_ext/kernel_gem.rb:68:in `gem'
 from -e:1:in `<main>'

But it seems to be unmaintained upstream 
https://github.com/fixlr/codemirror-rails/issues/61 so it is better to 
remove this package and use libjs-codemirror directly. Another option 
may be rails-assets.org, but that service seems unmaintained as well.

Full error log 
https://people.debian.org/~praveen/rails6-meta-build/autopkgtest/ruby-codemirror-rails.log