Use proper TMPDIR instead of /tmp

lib/cocoapods.rb

@@ -16,6 +16,7 @@ end
 
 module Pod
   require 'pathname'
+  require 'tmpdir'
 
   require 'cocoapods/gem_version'
   require 'cocoapods-core'

lib/cocoapods/command/spec/lint.rb

@@ -97,7 +97,7 @@ module Pod
         end
 
         def podspecs_tmp_dir
-          Pathname(File.join(Pathname.new('/tmp').realpath, '/CocoaPods/Lint_podspec'))
+          Pathname.new(Dir.tmpdir) + '/CocoaPods/Lint_podspec'
         end
       end
     end

lib/cocoapods/validator.rb

@@ -183,7 +183,7 @@ module Pod
     # @return [Pathname] the temporary directory used by the linter.
     #
     def validation_dir
-      Pathname.new(File.join(Pathname.new('/tmp').realpath, 'CocoaPods/Lint'))
+      Pathname(Dir.tmpdir) + 'CocoaPods/Lint'
     end
 
     #-------------------------------------------------------------------------#
@@ -510,7 +510,7 @@ module Pod
           l.include?('note: ') && (l !~ /expanded from macro/)
       end
       selected_lines.map do |l|
-        new = l.gsub(%r{/tmp/CocoaPods/Lint/Pods/}, '')
+        new = l.gsub(%r{#{validation_dir}/Pods/}, '')
         new.gsub!(/^ */, ' ')
       end
     end

spec/unit/installer/analyzer_spec.rb

@@ -72,7 +72,7 @@ module Pod
       end
 
       it 'does not update non-git repositories' do
-        tmp_directory = '/private/tmp/CocoaPods/'
+        tmp_directory = Pathname(Dir.tmpdir) + 'CocoaPods'
         FileUtils.mkdir_p(tmp_directory)
         FileUtils.cp_r(ROOT + 'spec/fixtures/spec-repos/test_repo/', tmp_directory)
         non_git_repo = tmp_directory + 'test_repo'

spec/unit/validator_spec.rb

@@ -88,7 +88,7 @@ module Pod
         validator.quick = true
         validator.stubs(:validate_url)
         validator.validate
-        validator.validation_dir.should.be == Pathname.new('/private/tmp/CocoaPods/Lint')
+        validator.validation_dir.should.be == Pathname.new(ENV['TMPDIR']) + 'CocoaPods/Lint'
       end
     end