GF/src is now for 2.9, and the new sources are in src-3.0 - keep it this way until the release of GF 3

src-3.0/GF/Infra/CompactPrint.hs

@@ -0,0 +1,22 @@
+module GF.Infra.CompactPrint where
+import Data.Char
+
+compactPrint = compactPrintCustom keywordGF (const False)
+
+compactPrintGFCC = compactPrintCustom (const False) keywordGFCC
+
+compactPrintCustom pre post = dps . concat . map (spaceIf pre post) . words 
+
+dps = dropWhile isSpace
+
+spaceIf pre post w = case w of
+  _ | pre w -> "\n" ++ w
+  _ | post w -> w ++ "\n"
+  c:_ | isAlpha c || isDigit c -> " " ++ w
+  '_':_  -> " " ++ w
+  _ -> w
+
+keywordGF w = elem w ["cat","fun","lin","lincat","lindef","oper","param"]
+keywordGFCC w = 
+  last w == ';' || 
+  elem w ["flags","fun","cat","lin","oper","lincat","lindef","printname","param"]