PythonDependency: massive refactoring.

Closes Homebrew/homebrew#24842.

1 files changed, 3 insertions, 5 deletions

diff --git a/Library/Homebrew/dependency_collector.rb b/Library/Homebrew/dependency_collector.rb
index b3b1f52e1..0e3feac8e 100644
--- a/Library/Homebrew/dependency_collector.rb
+++ b/Library/Homebrew/dependency_collector.rb
@@ -74,9 +74,6 @@ class DependencyCollector
     if tags.empty?
       Dependency.new(spec, tags)
     elsif (tag = tags.first) && LANGUAGE_MODULES.include?(tag)
-      # Next line only for legacy support of `depends_on 'module' => :python`
-      # It should be replaced by `depends_on :python => 'module'`
-      return PythonDependency.new("2", Array(spec)) if tag == :python
       LanguageModuleDependency.new(tag, spec)
     else
       Dependency.new(spec, tags)
@@ -105,8 +102,9 @@ class DependencyCollector
     when :clt        then CLTDependency.new(tags)
     when :arch       then ArchRequirement.new(tags)
     when :hg         then MercurialDependency.new(tags)
-    when :python, :python2 then PythonDependency.new("2", tags)
-    when :python3    then PythonDependency.new("3", tags)
+    # python2 is deprecated
+    when :python, :python2 then PythonDependency.new(tags)
+    when :python3    then Python3Dependency.new(tags)
     # Tiger's ld is too old to properly link some software
     when :ld64       then LD64Dependency.new if MacOS.version < :leopard
     when :ant        then ant_dep(spec, tags)