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-rw-r--r--lib/bundler/vendor/pub_grub/lib/pub_grub/rubygems.rb45
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/bundler/vendor/pub_grub/lib/pub_grub/rubygems.rb b/lib/bundler/vendor/pub_grub/lib/pub_grub/rubygems.rb
new file mode 100644
index 0000000000..245c23be22
--- /dev/null
+++ b/lib/bundler/vendor/pub_grub/lib/pub_grub/rubygems.rb
@@ -0,0 +1,45 @@
+module Bundler::PubGrub
+ module RubyGems
+ extend self
+
+ def requirement_to_range(requirement)
+ ranges = requirement.requirements.map do |(op, ver)|
+ case op
+ when "~>"
+ name = "~> #{ver}"
+ bump = ver.class.new(ver.bump.to_s + ".A")
+ VersionRange.new(name: name, min: ver, max: bump, include_min: true)
+ when ">"
+ VersionRange.new(min: ver)
+ when ">="
+ VersionRange.new(min: ver, include_min: true)
+ when "<"
+ VersionRange.new(max: ver)
+ when "<="
+ VersionRange.new(max: ver, include_max: true)
+ when "="
+ VersionRange.new(min: ver, max: ver, include_min: true, include_max: true)
+ when "!="
+ VersionRange.new(min: ver, max: ver, include_min: true, include_max: true).invert
+ else
+ raise "bad version specifier: #{op}"
+ end
+ end
+
+ ranges.inject(&:intersect)
+ end
+
+ def requirement_to_constraint(package, requirement)
+ Bundler::PubGrub::VersionConstraint.new(package, range: requirement_to_range(requirement))
+ end
+
+ def parse_range(dep)
+ requirement_to_range(Gem::Requirement.new(dep))
+ end
+
+ def parse_constraint(package, dep)
+ range = parse_range(dep)
+ Bundler::PubGrub::VersionConstraint.new(package, range: range)
+ end
+ end
+end