drop regex-compat/regex-posix dependency

Ledger/RawLedger.hs

@@ -182,8 +182,7 @@ matchpats pats str =
     where
       (negatives,positives) = partition isnegativepat pats
       match "" = True
-      match pat = matchregex (abspat pat) str
+      match pat = containsRegex (abspat pat) str
       negateprefix = "not:"
       isnegativepat pat = negateprefix `isPrefixOf` pat
       abspat pat = if isnegativepat pat then drop (length negateprefix) pat else pat
-      matchregex pat str = null pat || containsRegex (mkRegexWithOpts pat True False) str

Ledger/Utils.hs

@@ -19,7 +19,7 @@ module Data.Time.LocalTime,
 module Debug.Trace,
 module Ledger.Utils,
 module Text.Printf,
-module Text.Regex,
+module Text.RegexPR,
 module Test.HUnit,
 )
 where
@@ -39,7 +39,7 @@ import Debug.Trace
 import System.IO.UTF8
 import Test.HUnit
 import Text.Printf
-import Text.Regex
+import Text.RegexPR
 import Text.ParserCombinators.Parsec
 
 
@@ -147,10 +147,8 @@ difforzero a b = maximum [(a - b), 0]
 
 -- regexps
 
-instance Show Regex where show r = "a Regex"
-
-containsRegex :: Regex -> String -> Bool
-containsRegex r s = case matchRegex r s of
+containsRegex :: String -> String -> Bool
+containsRegex r s = case matchRegexPR ("(?i)"++r) s of
                       Just _ -> True
                       otherwise -> False
 
@@ -215,7 +213,7 @@ treeany f t = (f $ root t) || (any (treeany f) $ branches t)
 
 -- | show a compact ascii representation of a tree
 showtree :: Show a => Tree a -> String
-showtree = unlines . filter (containsRegex (mkRegex "[^ |]")) . lines . drawTree . treemap show
+showtree = unlines . filter (containsRegex "[^ |]") . lines . drawTree . treemap show
 
 -- | show a compact ascii representation of a forest
 showforest :: Show a => Forest a -> String

Options.hs

@@ -9,7 +9,6 @@ import System
 import System.Console.GetOpt
 import System.Environment
 import Text.Printf
-import Text.RegexPR (gsubRegexPRBy)
 import Data.Char (toLower)
 import Ledger.IO (IOArgs,
                   ledgerenvvar,myLedgerPath,

hledger.cabal

@@ -109,7 +109,6 @@ executable hledger
                  ,mtl
                  ,parsec
                  ,process
-                 ,regex-compat
                  ,regexpr >= 0.5.1
                  ,split
                  ,testpack