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module Ninja.Pretty
( renderNinja, ppFile
, ppDecl, ppDef, ppDefs, ppTargets, ppImplicitTargets, ppOrderOnlyTargets
) where
import Prelude hiding ( empty )
import Text.Pretty
import Ninja.Types
renderNinja :: File -> String
renderNinja = showWidth 15 . ppFile
ppFile :: File -> Doc
ppFile (File decls) = (vsepBlank $ map ppDecl decls) <> hardline
ppDecl :: Decl -> Doc
ppDecl (Rule n ds) = nest 2 $ text "rule" <+> text n $$
ppDefs ds
ppDecl (Edge r eos ios eis iis ois ds) = nest 2 $
text "build" <+>
ppTargets eos <+>
ppImplicitTargets ios <>
colon <+>
text r <+>
ppTargets eis <+>
ppImplicitTargets iis <+>
ppOrderOnlyTargets ois $$ ppDefs ds
ppDecl (Var d) = ppDef d
ppDecl (Default t) = text "default" <+> text t
ppDecl (Subninja p) = text "subninja" <+> text p
ppDecl (Include p) = text "include" <+> text p
ppDecl (Pool n ds) = nest 2 $ text "pool" <+> text n $$
ppDefs ds
ppDef :: Def -> Doc
ppDef (k,v) = text k <+> equals <+> text v
ppDefs :: [Def] -> Doc
ppDefs = vsep . map ppDef
ppTargets :: [Target] -> Doc
ppTargets = hsep . map (text . escapeFilenames)
ppImplicitTargets :: [Target] -> Doc
ppImplicitTargets [] = empty
ppImplicitTargets ts@(_:_) = char '|' <+> ppTargets ts
ppOrderOnlyTargets :: [Target] -> Doc
ppOrderOnlyTargets [] = empty
ppOrderOnlyTargets ts@(_:_) = text "||" <+> ppTargets ts
escapeFilenames :: Target -> Target
escapeFilenames = concatMap $ \c -> case c of
' ' -> "$ "
'$' -> "$$"
'\n' -> "$\n"
':' -> "$:"
_ -> [c]
|