+-- | Parse dynamic flags from a list of command line arguments. Returns the
+-- the parsed 'DynFlags', the left-over arguments, and a list of warnings.
+-- Throws a 'UsageError' if errors occurred during parsing (such as unknown
+-- flags or missing arguments).
+parseDynamicFlags :: Monad m =>
+ DynFlags -> [Located String]
+ -> m (DynFlags, [Located String], [Located String])
+ -- ^ Updated 'DynFlags', left-over arguments, and
+ -- list of warnings.
+parseDynamicFlags dflags args = parseDynamicFlags_ dflags args True
+
+-- | Like 'parseDynamicFlags' but does not allow the package flags (-package,
+-- -hide-package, -ignore-package, -hide-all-packages, -package-conf).
+parseDynamicNoPackageFlags :: Monad m =>
+ DynFlags -> [Located String]
+ -> m (DynFlags, [Located String], [Located String])
+ -- ^ Updated 'DynFlags', left-over arguments, and
+ -- list of warnings.
+parseDynamicNoPackageFlags dflags args = parseDynamicFlags_ dflags args False
+
+parseDynamicFlags_ :: Monad m =>
+ DynFlags -> [Located String] -> Bool
+ -> m (DynFlags, [Located String], [Located String])
+parseDynamicFlags_ dflags args pkg_flags = do
+ -- XXX Legacy support code
+ -- We used to accept things like
+ -- optdep-f -optdepdepend
+ -- optdep-f -optdep depend
+ -- optdep -f -optdepdepend
+ -- optdep -f -optdep depend
+ -- but the spaces trip up proper argument handling. So get rid of them.
+ let f (L p "-optdep" : L _ x : xs) = (L p ("-optdep" ++ x)) : f xs
+ f (x : xs) = x : f xs
+ f xs = xs
+ args' = f args
+
+ -- Note: -ignore-package (package_flags) must precede -i* (dynamic_flags)
+ flag_spec | pkg_flags = package_flags ++ dynamic_flags
+ | otherwise = dynamic_flags
+