Issue #7496 has been reported by bitsweat (Jeremy Kemper).

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Bug #7496: incorrect base_dir for default gemspecs
https://bugs.ruby-lang.org/issues/7496

Author: bitsweat (Jeremy Kemper)
Status: Open
Priority: Normal
Assignee: 
Category: lib
Target version: 2.0.0
ruby -v: ruby 2.0.0dev (2012-12-01 trunk 38126) [x86_64-darwin12.2.0]


gemspecs for default gems have incorrect path since they're installed in a subdirectory of the normal specifications path. The base_dir is dirname(dirname(loaded_from)), so using an additional subdir results in a base_dir that's "off by one." Example:

Find the gemspec for the default rake gem:

> spec = Gem::Specification.find_by_name('rake')
=> #<Gem::Specification:0x3fc3fa4dd570 rake-0.9.5>
> spec.default_gem?
=> true
> spec.loaded_from
=> "/Users/jeremy/.rbenv/versions/2.0.0-preview2/lib/ruby/gems/2.0.0/specifications/default/rake-0.9.5.gemspec"


The spec.base_dir should be "/Users/jeremy/.rbenv/versions/2.0.0-preview2/lib/ruby/gems/2.0.0"

> spec.base_dir
=> "/Users/jeremy/.rbenv/versions/2.0.0-preview2/lib/ruby/gems/2.0.0/specifications"


This means Gem.bin_path lookups in bin/rake, etc result in incorrect executable paths:

> spec.bin_file('rake')
=> "/Users/jeremy/.rbenv/versions/2.0.0-preview2/lib/ruby/gems/2.0.0/specifications/gems/rake-0.9.5/bin/rake"
> File.file? _
=> false


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