Ant must be installed to run rake targets, but we don't use ant anymore #2236

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1. headius

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   tests

   on Nov 24, 2014
2. headius

   added a commit that references this issue on Nov 24, 2014

   Add Ant to build prerequisites for now (#2236)

   13b6fc3
3. headius commented on Nov 24, 2014

   

   headius

   on Nov 24, 2014

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   The error produced when you don't have ant installed is also rather cryptic. Here it is with full trace output: https://gist.github.com/headius/6c6d83229d5a979ae8cf
4. perlun commented on Apr 13, 2018

   

   perlun

   on Apr 13, 2018

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   The error you get right now looks like this:

   $ rake spec:ruby
   could not load ant: #<Errno::ENOENT: No such file or directory - ant>
   MSPEC: {:compile_mode=>"OFF", :format=>"d", :jit_threshold=>20, :jit_max=>-1, :objectspace_enabled=>true, :thread_pooling=>false, :reflection=>false}
   rm -rf rubyspec_temp
   rake aborted!
   NameError: undefined local variable or method `ant' for main:Object
   /Volumes/git/3rd-party/jruby/rakelib/commands.rake:27:in `initialize_paths'
   /Volumes/git/3rd-party/jruby/rakelib/commands.rake:45:in `jruby'
   /Volumes/git/3rd-party/jruby/rakelib/commands.rake:90:in `mspec'
   /Volumes/git/3rd-party/jruby/rakelib/rubyspec.rake:63:in `block in (root)'
   /Users/plundberg/.rvm/gems/jruby-9.1.16.0/gems/rake-12.3.1/exe/rake:27:in `<main>'
   Tasks: TOP => spec:ruby => spec:ci_interpreted => spec:interpreted
   (See full trace by running task with --trace)
   

   (Also, worth mentioning is that if you are using macOS, a simple way to get a working ant command is brew install ant, if you have a working Homebrew install.)
5. headius commented on Apr 13, 2018

   

   headius

   on Apr 13, 2018

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   Yeah the main thing keeping Ant in the build is that we're using its Java-launching task throughout our test runs. We need a good replacement for that, one that allows us to customize JRuby and Java opts from callers.
6. headius commented on Apr 13, 2018

   

   headius

   on Apr 13, 2018

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   See rakelib/commands.rake for the primary calls to Ant we need to replace. Basically the java task in our Ant integration has a set of properties we can set, like classpath etc. Perhaps we fake them by making a look-alike Struct and then peeling out the piece and building our own command line?