[VersionConflict] Allow customizing incompatible_version_message_for_conflict

CHANGELOG.md

@@ -7,6 +7,11 @@
 * Improve performance of `Vertex#path_to?`.  
   [Samuel Giddins](https://github.com/segiddins)
 
+* Allow customization of string used to say that a version conflict has occurred
+  for a particular name by passing in the `:incompatible_version_message_for_conflict` 
+  key when constructing a version conflict message with trees.  
+  [Samuel Giddins](https://github.com/segiddins)
+
 ##### Bug Fixes
 
 * None.  

Rakefile

@@ -52,29 +52,31 @@ begin
 
     files = FileList['lib/**/*.rb']
 
-    out, err = Open3.popen3('ruby', '-w', '-Ilib') do |stdin, stdout, stderr, _wait_thr|
-      files.each do |file|
-        stdin.puts "require '#{file.gsub(%r{(^lib/|\.rb$)}, '')}'"
-      end
-      stdin.close
-
-      [stdout, stderr].map do |io|
-        chunk_size = 16_384
-        select_timeout = 0.02
-        buffer = []
-        next '' if io.closed? || io.eof?
-        # IO.select cannot be used here due to the fact that it
-        # just does not work on windows
-        loop do
-          begin
-            IO.select([io], nil, nil, select_timeout)
-            break if io.eof? # stop raising :-(
-            buffer << io.readpartial(chunk_size)
-          rescue EOFError
-            break
+    out, err = Bundler.with_original_env do
+      Open3.popen3(Gem.ruby, '-w', '-Ilib') do |stdin, stdout, stderr, _wait_thr|
+        files.each do |file|
+          stdin.puts "require '#{file.gsub(%r{(^lib/|\.rb$)}, '')}'"
+        end
+        stdin.close
+
+        [stdout, stderr].map do |io|
+          chunk_size = 16_384
+          select_timeout = 0.02
+          buffer = []
+          next '' if io.closed? || io.eof?
+          # IO.select cannot be used here due to the fact that it
+          # just does not work on windows
+          loop do
+            begin
+              IO.select([io], nil, nil, select_timeout)
+              break if io.eof? # stop raising :-(
+              buffer << io.readpartial(chunk_size)
+            rescue EOFError
+              break
+            end
           end
+          buffer.join.strip
         end
-        buffer.join.strip
       end
     end
 

lib/molinillo/errors.rb

@@ -101,9 +101,14 @@ def message_with_trees(opts = {})
       printable_requirement = opts.delete(:printable_requirement) { proc { |req| req.to_s } }
       additional_message_for_conflict = opts.delete(:additional_message_for_conflict) { proc {} }
       version_for_spec = opts.delete(:version_for_spec) { proc(&:to_s) }
+      incompatible_version_message_for_conflict = opts.delete(:incompatible_version_message_for_conflict) do
+        proc do |name, _conflict|
+          %(#{solver_name} could not find compatible versions for #{possibility_type} "#{name}":)
+        end
+      end
 
       conflicts.sort.reduce(''.dup) do |o, (name, conflict)|
-        o << %(\n#{solver_name} could not find compatible versions for #{possibility_type} "#{name}":\n)
+        o << "\n" << incompatible_version_message_for_conflict.call(name, conflict) << "\n"
         if conflict.locked_requirement
           o << %(  In snapshot (#{name_for_locking_dependency_source}):\n)
           o << %(    #{printable_requirement.call(conflict.locked_requirement)}\n)