Add possibility to map some Trac keywords to GitHub labels

Doing it for all keywords is not a good idea as there are typically too
many of them, but it can be still worth doing it for some selected
keywords, that can now be specified in the labels config file section.

Author: vadz

trac-hub

@@ -272,6 +272,12 @@ class Migrator
     labels.add(@labels.fetch('priority', Hash[])[ticket[:priority]])
     labels.add(@labels.fetch('severity', Hash[])[ticket[:severity]])
     labels.add(@labels.fetch('version', Hash[])[ticket[:version]])
+
+    keywords = @labels.fetch('keywords', Hash[])
+    ticket[:keywords].split(/[,;]? +/).each do |kw|
+      labels.add(keywords[kw])
+    end
+
     # If the field is not set, it will be nil and generate an unprocessable json
     labels.delete(nil)