Workaround for Transifex YML issues

script/pull_translations.rb

@@ -58,7 +58,7 @@ end
 # Add comments to the top of files and replace the language (first key in YAML file)
 def update_file_header(filename, language)
   lines = File.readlines(filename)
-  lines.collect! {|line| line =~ /^[a-z_]+:$/i ? "#{language}:" : line}
+  lines.collect! { |line| line =~ /^[a-z_]+:$/i ? "#{language}:" : line }
 
   File.open(filename, 'w+') do |f|
     f.puts(YML_FILE_COMMENTS, '') unless lines[0][0] == '#'
@@ -211,6 +211,61 @@ def add_anchors_and_aliases(english_alias_data, filename)
   end
 end
 
+def fix_invalid_yml_keys(filename)
+  lines = File.readlines(filename)
+
+  # fix YAML keys which are on the wrong line
+  lines.each { |line| line.gsub!(/^(.*(?:'|"))(\s*\S*:)$/, "\\1\n\\2") }
+
+  File.open(filename, 'w+') do |f|
+    f.puts(lines)
+  end
+end
+
+def fix_invalid_yml(filename)
+  lines = File.readlines(filename)
+
+  lines.each_with_index do |line, i|
+    if line =~ /^\s+#.*$/i
+      # remove comments
+      lines[i] = nil
+    elsif line.strip.empty?
+      # remove empty lines
+      lines[i] = nil
+    elsif line =~ /^\s+.*: (?:""|''|)$/i
+      # remove lines which contain empty string values
+      lines[i] = nil
+    elsif line =~ /^(\s)*.*: \|$/i
+      next_line = i + 1 < lines.size ? lines[i + 1] : nil
+
+      if next_line.nil? || line[/^\s*/].size + 2 != next_line[/^\s*/].size
+        # remove lines which contain the value | without a string in the next line
+        lines[i] = nil
+      end
+    end
+  end.compact!
+
+  loop do
+    lines.each_with_index do |line, i|
+      if line =~ /^\s+\w*:\s*$/i
+        next_line = i + 1 < lines.size ? lines[i + 1] : nil
+
+        if next_line.nil? || line[/^\s*/].size >= next_line[/^\s*/].size
+          # remove lines which have an empty value and are not followed
+          # by a key on the next level
+          lines[i] = nil
+        end
+      end
+    end
+
+    break if lines.compact!.nil?
+  end
+
+  File.open(filename, 'w+') do |f|
+    f.puts(lines)
+  end
+end
+
 YML_DIRS.each do |dir|
   YML_FILE_PREFIXES.each do |prefix|
     english_alias_data = get_english_alias_data(dir, prefix)
@@ -219,7 +274,13 @@ YML_DIRS.each do |dir|
       filename = yml_path(dir, prefix, language)
 
       if filename
+        # TODO remove this as soon as Transifex provides valid YAML files again
+        fix_invalid_yml_keys(filename)
+        fix_invalid_yml(filename)
+
+        # TODO check if this is still needed with recent Transifex changes
         add_anchors_and_aliases(english_alias_data, filename)
+
         update_file_header(filename, language)
       end
     end