Fix #803 by unquoting all UTF8 escapes

Work around Sass 3.4.x generating BOM that break IE10+
https://github.com/sass/sass/issues/1395

1 files changed, 7 insertions, 0 deletions

diff --git a/tasks/converter/less_conversion.rb b/tasks/converter/less_conversion.rb
index ad668905..b530be47 100644
--- a/tasks/converter/less_conversion.rb
+++ b/tasks/converter/less_conversion.rb
@@ -170,6 +170,7 @@ class Converter
       file   = deinterpolate_vararg_mixins(file)
       file   = replace_calculation_semantics(file)
       file   = replace_file_imports(file)
+      file   = unquote_utf8_escape_sequences(file)
       file
     end
 
@@ -314,6 +315,12 @@ SASS
                 %Q(@import "#{target_path}\\1";)
     end
 
+    # Unquote escape sequences, e.g. content: "#{$sep}\00a0" to content: #{$sep}\00a0
+    # Works around Sass 3.4 issue: https://github.com/sass/sass/issues/1395
+    def unquote_utf8_escape_sequences(scss)
+      scss.gsub /\"((?:#\{[^}]+\})?\\[a-f0-9]{4,}?)\"/, '\1'
+    end
+
     def replace_all(file, regex, replacement = nil, &block)
       log_transform regex, replacement
       new_file = file.gsub(regex, replacement, &block)