extract/factor-out common code

hs/BashParser.hs

@@ -7,16 +7,16 @@ module BashParser (
 
 import Control.Applicative (some, (<|>), many)
 import Data.Maybe (catMaybes)
-import Text.Parsec (Parsec, char, string, noneOf, modifyState, endOfLine,
-                    getState, try, eof)
+import Text.Parsec (char, string, noneOf, modifyState, endOfLine, getState,
+                    try, eof)
 
-import Utils (spaces, line, just, nothing)
+import Utils (StringParser, spaces, line, just, nothing)
 
 type Path = String
 type Filename = String
 
 data ParserState = ParserState Char Path
-type Parser = Parsec String ParserState
+type Parser = StringParser ParserState
 
 ppath :: Parser String
 ppath = do

hs/Utils.hs

@@ -1,13 +1,16 @@
 module Utils (
+  StringParser,
   spaces,
   line,
   just,
   nothing
 ) where
 
-import Text.Parsec (Stream, ParsecT, skipMany, char, noneOf, endOfLine,
+import Text.Parsec (Parsec, Stream, ParsecT, skipMany, char, noneOf, endOfLine,
                     manyTill)
 
+type StringParser u = Parsec String u
+
 spaces :: Stream s m Char => ParsecT s u m ()
 spaces = skipMany $ char ' '
 

hs/Vflow.hs

@@ -15,8 +15,9 @@ import BashParser (Filename, Path)
 import qualified BashParser as B
 import VflowParser (Block(NewFile))
 import qualified VflowParser as V
+import Utils (StringParser)
 
-parse :: Parsec String s a -> s -> Filename -> ExceptT ParseError IO a
+parse :: StringParser s a -> s -> Filename -> ExceptT ParseError IO a
 parse parser state filename = do
   content <- lift $ readFile filename
 

hs/VflowParser.hs

@@ -15,15 +15,15 @@ import Control.Applicative ((<|>), many)
 import Data.Function ((&))
 import Data.Functor (void)
 import Data.Maybe (catMaybes)
-import Text.Parsec (Parsec, SourcePos, getState, getParserState, statePos,
-                    string, endOfLine, noneOf, char, optionMaybe, try, eof)
+import Text.Parsec (SourcePos, getState, getParserState, statePos, string,
+                    endOfLine, noneOf, char, optionMaybe, try, eof)
 
-import Utils (spaces, line, just, nothing)
+import Utils (StringParser, spaces, line, just, nothing)
 
 type HostLangComment = String
 type Indent = Int
 data ParserState = ParserState HostLangComment Indent Indent
-type Parser = Parsec String ParserState
+type Parser = StringParser ParserState
 
 type Name = String
 type Comment = String