hakyll groups

gistfile1.hs

    group "processTags" $ match "published/*" $ compile $ readPageCompiler

    create "tags" $
      ( requireAll
        ( (inGroup $ Just "processTags") `mappend` "published/*" )
        (\_ ps -> readTags ps :: Tags String) )

    -- Add a tag list compiler for every tag
    match "tags/*" $ route $ setExtension ".html"
    metaCompile $ require_ "tags"
        >>> arr tagsMap
        >>> arr (map (\(t, p) -> (tagIdentifier t, 
                                  makeTagList t p) ) )