+
+-- -----------------------------------------------------------------------------
+-- Building ModLocations
+
+mkHiOnlyModLocation hisuf mod_name path basename extension = do
+ addToFinderCache mod_name result
+ return result
+ where
+ result = ( mkHomeModule mod_name, hiOnlyModLocation path basename hisuf )
+
+mkPackageModLocation hisuf mod_name path basename _extension = do
+ addToFinderCache mod_name result
+ return result
+ where
+ result = ( mkPackageModule mod_name, hiOnlyModLocation path basename hisuf )
+
+hiOnlyModLocation path basename hisuf =
+ ModLocation{ ml_hspp_file = Nothing,
+ ml_hs_file = Nothing,
+ -- remove the .hi-boot suffix from hi_file, if it
+ -- had one. We always want the name of the real
+ -- .hi file in the ml_hi_file field.
+ ml_hi_file = path ++ '/':basename ++ '.':hisuf,
+ ml_obj_file = Nothing
+ }
+
+-- -----------------------------------------------------------------------------
+-- Constructing a home module location
+
+-- The .hi file always follows the module name, whereas the object
+-- file may follow the name of the source file in the case where the
+-- two differ (see summariseFile in compMan/CompManager.lhs).
+
+-- The source filename is specified in three components. For example,
+-- if we have a module "A.B.C" which was found along the patch "/P/Q/R"
+-- with extension ".hs", then the full filename is "/P/Q/R/A/B/C.hs". The
+-- components passed to mkHomeModLocation are
+--
+-- path: "/P/Q/R"
+-- basename: "A/B/C"
+-- extension: "hs"
+--
+-- the object file and interface file are constructed by possibly
+-- replacing the path component with the values of the -odir or the
+-- -hidr options respectively, and the extension with the values of
+-- the -osuf and -hisuf options respectively. That is, the basename
+-- always remains intact.
+--
+-- mkHomeModLocation is called directly by the compilation manager to
+-- construct the information for a root module. For a "root" module,
+-- the rules are slightly different. The filename is allowed to
+-- diverge from the module name, but we have to name the interface
+-- file after the module name. For example, a root module
+-- "/P/Q/R/foo.hs" will have components
+--
+-- path: "/P/Q/R"
+-- basename: "foo"
+-- extension: "hs"
+--
+-- and we set the flag is_root to True, to indicate that the basename
+-- portion for the .hi file should be replaced by the last component
+-- of the module name. eg. if the module name is "A.B.C" then basename
+-- will be replaced by "C" for the .hi file only, resulting in an
+-- .hi file like "/P/Q/R/C.hi" (subject to -hidir and -hisuf as usual).
+
+mkHomeModLocation mod_name is_root path basename extension = do
+
+ hisuf <- readIORef v_Hi_suf
+ hidir <- readIORef v_Hi_dir
+ odir <- readIORef v_Output_dir
+ osuf <- readIORef v_Object_suf
+
+ let -- hi filename
+ mod_str = moduleNameUserString mod_name
+ (_,mod_suf) = split_longest_prefix mod_str (=='.')
+
+ hi_basename
+ | is_root = mod_suf
+ | otherwise = basename
+
+ hi_path | Just d <- hidir = d
+ | otherwise = path
+ hi_fn = hi_path ++ '/':hi_basename ++ '.':hisuf
+
+ -- source filename (extension is always .hs or .lhs)
+ source_fn
+ | path == "." = basename ++ '.':extension
+ | otherwise = path ++ '/':basename ++ '.':extension
+
+ -- the object filename
+ obj_path | Just d <- odir = d
+ | otherwise = path
+ obj_fn = obj_path ++ '/':basename ++ '.':osuf
+
+
+ result = ( mkHomeModule mod_name,
+ ModLocation{ ml_hspp_file = Nothing,
+ ml_hs_file = Just source_fn,
+ ml_hi_file = hi_fn,
+ ml_obj_file = Just obj_fn,
+ })
+
+ addToFinderCache mod_name result
+ return result