lib: do not try to balance transaction in csv reader

hledger-lib/Hledger/Read/CsvReader.hs

@@ -750,7 +750,7 @@ transactionFromCsvRecord sourcepos rules record = t
         case account of
           Nothing -> Nothing
           Just account -> 
-            Just $ (number, posting {paccount=account, pamount=fromMaybe missingmixedamt amount, ptransaction=Just t', pbalanceassertion=toAssertion <$> balance, pcomment = comment})
+            Just $ (number, posting {paccount=account, pamount=fromMaybe missingmixedamt amount, ptransaction=Just t, pbalanceassertion=toAssertion <$> balance, pcomment = comment})
 
     parsePosting number =              
       parsePosting' number
@@ -787,41 +787,33 @@ transactionFromCsvRecord sourcepos rules record = t
                                          , "amount/amount-in/amount-out is " ++ showMixedAmount al
                                          , "amount1/amount1-in/amount1-out is " ++ showMixedAmount a1
                                          ]
-          in Just $ ("1", posting {paccount=paccount posting1, pamount=amount, ptransaction=Just t', pbalanceassertion=balanceassertion, pcomment = pcomment posting1})
+          in Just $ ("1", posting {paccount=paccount posting1, pamount=amount, ptransaction=Just t, pbalanceassertion=balanceassertion, pcomment = pcomment posting1})
         (Nothing, Nothing) -> Nothing
     postings' = catMaybes $ posting1:[ parsePosting i | x<-[2..9], let i = show x]
+
+    improveUnknownAccountName p =
+      if paccount p /="unknown"
+      then p
+      else case isNegativeMixedAmount (pamount p) of
+        Just True -> p{paccount = "income:unknown"}
+        Just False -> p{paccount = "expenses:unknown"}
+        _ -> p
+        
     postings =
       case postings' of
         -- To be compatible with the behavior of the old code which allowed two postings only, we enforce
         -- second posting when rules generated just first of them.
         -- When we have srictly first and second posting, but second posting does not have amount, we fill it in.
-        [("1",posting1)] -> [posting1,posting{paccount="unknown", pamount=costOfMixedAmount(-(pamount posting1)), ptransaction=Just t'}]
+        [("1",posting1)] ->
+          [posting1,improveUnknownAccountName (posting{paccount="unknown", pamount=costOfMixedAmount(-(pamount posting1)), ptransaction=Just t})]
         [("1",posting1),("2",posting2)] ->
           case (pamount posting1 == missingmixedamt , pamount posting2 == missingmixedamt) of
-            (False, True) -> [posting1, posting2{pamount=costOfMixedAmount(-(pamount posting1))}]
+            (False, True) -> [posting1, improveUnknownAccountName (posting2{pamount=costOfMixedAmount(-(pamount posting1))})]
             _  -> [posting1, posting2]
         _ -> map snd postings'
         
-    balanced = balanceTransaction Nothing t'
-    t =
-      case balanced of
-        Left _ -> t'
-        Right balanced ->
-          -- If we managed to balance transaction, lets infer better names for all "unknown" accounts
-          t' {tpostings =
-              [ originalPosting {paccount=newAccount}
-              | (originalPosting,p) <- zip postings (tpostings balanced)
-              , let account = paccount p
-              , let newAccount =
-                      if account/="unknown"
-                      then account
-                      else case isNegativeMixedAmount (pamount p) of
-                             Just True -> "income:unknown"
-                             Just False -> "expenses:unknown"
-                             _ -> "unknown"
-              ]}
     -- build the transaction
-    t' = nulltransaction{
+    t = nulltransaction{
       tsourcepos               = genericSourcePos sourcepos,
       tdate                    = date',
       tdate2                   = mdate2',

tests/csv.test

@@ -217,9 +217,9 @@ account3   expenses:tax
 
 $  ./hledger-csv
 2009/09/10 Flubber Co
-    assets:myacct              $50 = $321
+    assets:myacct             $50 = $321
-    income:unknown     = $123
+    unknown           = $123
-    expenses:tax            $0.234  ; VAT
+    expenses:tax           $0.234  ; VAT
 
 >=0
 
@@ -346,8 +346,8 @@ amount %2
 date %1
 date-format %Y/%m/%d
 $  ./hledger-csv | hledger balance -f - --no-total 
-           $1,001.00  expenses:unknown
           $-1,001.00  income:unknown
+           $1,001.00  unknown
 >=0
 
 # 18. Conditional skips