u3d/install & u3d/available no INI file error on Linux

[IvanRibakov]

Issue Checklist

• I'm using the latest u3d version
• I ran u3d --help
• I read the README
• I made sure that a similar issue doesn't exit

Issue Description

Running u3d install 2017.1.1f1 results in

root@a1bb72ffaccd:/# u3d install 2017.1.1f1 --trace
No INI file for version 2017.1.1f1. Try discovering the available versions with 'u3d available -f'
/usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/unity_version_definition.rb:44:in `available_packages': undefined method `keys' for nil:NilClass (NoMethodError)
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/unity_version_definition.rb:48:in `available_package?'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands.rb:232:in `block in verify_package_names'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands.rb:231:in `each'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands.rb:231:in `verify_package_names'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands.rb:122:in `install'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands_generator.rb:156:in `block (2 levels) in run'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/commander-4.4.4/lib/commander/command.rb:178:in `call'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/commander-4.4.4/lib/commander/command.rb:153:in `run'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/commander-4.4.4/lib/commander/runner.rb:446:in `run_active_command'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/commander-4.4.4/lib/commander/runner.rb:68:in `run!'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/commander-4.4.4/lib/commander/delegates.rb:15:in `run!'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands_generator.rb:209:in `run'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/lib/u3d/commands_generator.rb:37:in `start'
	from /usr/local/rvm/gems/ruby-2.4.1/gems/u3d-1.0.15/exe/u3d:7:in `<top (required)>'
	from /usr/local/rvm/gems/ruby-2.4.1/bin/u3d:23:in `load'
	from /usr/local/rvm/gems/ruby-2.4.1/bin/u3d:23:in `<main>'
	from /usr/local/rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `eval'
	from /usr/local/rvm/gems/ruby-2.4.1/bin/ruby_executable_hooks:15:in `<main>'

Tried above command on versions 2017.2.0b11, 2017.1.1f1 and 5.6.3f1 without any luck.

Similar happens when trying to list available versions AND their packages:

root@a1bb72ffaccd:/# u3d available -f -p
Fetching central 'versions.json' cache
Version 5.1.0f3: http://download.unity3d.com/download_unity/unity-editor-installer-5.1.0f3+2015091501.sh
No INI file for version 5.1.0f3. Try discovering the available versions with 'u3d available -f'
Packages:
error: undefined method `each_key' for nil:NilClass. Use --trace to view backtrace

Am I missing something obvious again or has the location of ini files changed on the network?

[lacostej]

@IvanRibakov Unity doesn't provide INI files for Linux, we create them. Maybe (most probably) I broke something when introducing the central versions cache (to avoid local discovery). I don't use yet the Linux version daily so I may have forgotten to clear our cache when running our tests.

There's no way to disable the central cache right now, but when if fails, it falls back to searching for the versions itself.

I think that if you add an entry to your /etc/hosts to point dragonbox.github.io somewhere else (e.g. 127.0.0.1), it should fail fetching from the versions cache and fallback to manual discovery.

[IvanRibakov]

Trick with /etc/hosts worked, thanks!

Btw, reason I thought .ini files were moved on the network was because I came across this post previously: https://forum.unity.com/threads/error-404-getting-https-netstorage-unity3d-com-unity-3c89f8d277f5-unity-2017-3-0f1-linux-ini.508123/

But I'm guessing that's part of the changes introduced in 2017.3 (along with Download Assistant).

[lacostej]

@IvanRibakov feature released as part of 1.0.16