csv: merge lucamolteni's cassava/custom separators (squashed) (#829)

commit 5ba464de761b298e50d57a8b7d14bc28adb30d5d
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Sep 7 17:54:12 2018 +0200

    Fix CI 2

commit f060ae9449f4b61a915b0ed4629fc1ba9b66fb4a
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Sep 7 17:30:08 2018 +0200

    Fix CI build

commit af0719a33b9b72ad244ae80198d881a1f7145e9d
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Sep 7 17:19:01 2018 +0200

    Fix rebase

commit 1a24ddfa54dfb4ff1326e1a51005ffa82d3dc3c8
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Aug 10 16:25:24 2018 +0200

    Fixed some GHC warnings

commit 1ac43398a359b5925ef71f53347698f1c6c510ef
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Aug 10 16:14:49 2018 +0200

    Fix .cabal

commit 422456b925d8aa4ab3e869f51e98c2b1c3dcde0a
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jul 1 22:56:20 2018 +0200

    Removed to-do list

commit 1118b762e4fd15c4fe7ba48ba86676706ea3a5a5
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jul 1 22:53:28 2018 +0200

    Better test

commit 1146ed0941655668bf7684f18aa15c5f4b9b20c2
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jul 1 15:32:28 2018 +0200

    Fix parsing

commit 4fc2374b2b81802990da30c96756aab54d77399c
Author: Luca Molteni <volothamp@gmail.com>
Date:   Thu Jun 21 22:11:11 2018 +0200

    Parsing of separator

commit f7a61737f1ad4460ba20ca9b2e86eb21468abb33
Author: Luca Molteni <volothamp@gmail.com>
Date:   Thu Jun 21 14:29:23 2018 +0200

    Almost separator in options

commit ac8841cf3b9c80914bc3271ad9b9ff4ae9ba48a7
Author: Luca Molteni <volothamp@gmail.com>
Date:   Thu Jun 21 14:16:59 2018 +0200

    Separator in parseCSV

commit 92a8b9f6ba77ea4237f769641e03029ac88542ea
Author: Luca Molteni <volothamp@gmail.com>
Date:   Thu Jun 21 13:30:41 2018 +0200

    separator option

commit ec417a81ae625647cf35e61776cdf02bdb2c6aea
Author: Luca Molteni <volothamp@gmail.com>
Date:   Thu Jun 21 10:45:26 2018 +0200

    Removed one qualified import

commit 8b2f386c2f780adcd34cff3de7edceacc1d325a7
Author: Luca Molteni <volothamp@gmail.com>
Date:   Wed Jun 20 14:01:12 2018 +0200

    Removed string conversions

commit a14d0e099e28a286bb81770cfc9cb8f5c7e5cf1f
Author: Luca Molteni <volothamp@gmail.com>
Date:   Wed Jun 20 10:23:20 2018 +0200

    custom delimiter in cassava

commit 694d48e2bc1ada0037b90367c017f3082f68ed45
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jun 10 17:51:54 2018 +0200

    Use Text.getContents - remove UTF-8 compatibility library

commit a7ada2cc60033ebdd796ca34cc2ec69a4f387843
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jun 10 17:49:34 2018 +0200

    todo list

commit 58ec47d3987909f6bace50e3e647e30dadd5bf03
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jun 10 17:45:22 2018 +0200

    CSV test now has unicode characters

commit b7851e94c3f1683b63ec7250a12bcde3b7bed691
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jun 10 16:59:39 2018 +0200

    Use decode from Text

commit 79f59fd28ccaca08fcd718fcd8d00b1c1d65d7e1
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sun Jun 10 13:28:57 2018 +0200

    Use Text and Lazy Bytestring

commit 470c9bcb8dc00669beb4ef0303a1e7d9f7aecc89
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 15:30:22 2018 +0200

    Use megaparsec error

commit f978848ba249ef4f67b855bea5d4e549290c205c
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 15:22:07 2018 +0200

    Renamed qualify and remove Parsec

commit 152587fde204c43a55798d212e43f37cd3038c2e
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 15:12:36 2018 +0200

    Use cassava mega parsec

commit cf281577a3d3a071196484a6fc8485f2ea1f7d67
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 14:01:47 2018 +0200

    Removed Data.Vector

commit 1272e8e758369d8cc5778029a705b277355a5029
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 12:16:18 2018 +0200

    Removed Parsec ParseError

commit ae07f043135a19307fd65b281ade37a74c76acb2
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 12:06:14 2018 +0200

    Type sinonim for ParsecError

commit 8e15b253c11bd1c0c35a7641aeb18aa54e0ba9b0
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 11:16:08 2018 +0200

    Replaced with typeclasses

commit 1ed46f9c175603611325f3d377004e4b85f29377
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 11:01:33 2018 +0200

    Replaced Text/CSV with Cassava

commit 362f4111b5854145703174b976fc7acbd71b8783
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 10:34:37 2018 +0200

    Use cassava parsin instead of Text/CSV

commit 83e678e371618687cf7c15a4e2cfa67f570b6b64
Author: Luca Molteni <volothamp@gmail.com>
Date:   Sat Jun 9 08:22:51 2018 +0200

    Text CSV error messages

commit f922df71d274beeacab9fb2530b16c97f005cc08
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Jun 8 21:45:20 2018 +0200

    Better types

commit edd130781c84790a53bff2283e6041eb8232e7cf
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Jun 8 21:34:59 2018 +0200

    Conversion to Text CSV type

commit 0799383214483018ad2d977a3c8022414959c2b2
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Jun 8 16:06:21 2018 +0200

    First function with cassava

commit e92aeb151ff527b383ff3d0ced7764e81b71af82
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Jun 8 13:47:34 2018 +0200

    Added cassava as dependency

commit 5ea005c558a3939af7e5f0cd735a9b4da931228e
Author: Luca Molteni <volothamp@gmail.com>
Date:   Fri Jun 8 13:18:47 2018 +0200

    Better .gitignore for multi idea modules

.gitignore

@@ -6,7 +6,7 @@ _*
 # dev stuff
 .build
 .idea
-/*.iml
+*.iml
 .shake
 .tmp
 .vscode

hledger-lib/Hledger/Data/RawOptions.hs

@@ -17,7 +17,8 @@ module Hledger.Data.RawOptions (
   maybestringopt,
   listofstringopt,
   intopt,
-  maybeintopt
+  maybeintopt,
+  maybecharopt
 )
 where
 
@@ -50,6 +51,9 @@ maybestringopt name = maybe Nothing (Just . T.unpack . stripquotes . T.pack) . l
 stringopt :: String -> RawOpts -> String
 stringopt name = fromMaybe "" . maybestringopt name
 
+maybecharopt :: String -> RawOpts -> Maybe Char
+maybecharopt name rawopts = lookup name rawopts >>= headMay
+
 listofstringopt :: String -> RawOpts -> [String]
 listofstringopt name rawopts = [v | (k,v) <- rawopts, k==name]
 

hledger-lib/Hledger/Read/Common.hs

@@ -158,6 +158,7 @@ data InputOpts = InputOpts {
      mformat_           :: Maybe StorageFormat  -- ^ a file/storage format to try, unless overridden
                                                 --   by a filename prefix. Nothing means try all.
     ,mrules_file_       :: Maybe FilePath       -- ^ a conversion rules file to use (when reading CSV)
+    ,separator_         :: Char                 -- ^ the separator to use (when reading CSV)
     ,aliases_           :: [String]             -- ^ account name aliases to apply
     ,anon_              :: Bool                 -- ^ do light anonymisation/obfuscation of the data 
     ,ignore_assertions_ :: Bool                 -- ^ don't check balance assertions
@@ -170,13 +171,14 @@ data InputOpts = InputOpts {
 instance Default InputOpts where def = definputopts
 
 definputopts :: InputOpts
-definputopts = InputOpts def def def def def def True def def
+definputopts = InputOpts def def ',' def def def def True def def
 
 rawOptsToInputOpts :: RawOpts -> InputOpts
 rawOptsToInputOpts rawopts = InputOpts{
    -- files_             = map (T.unpack . stripquotes . T.pack) $ listofstringopt "file" rawopts
    mformat_           = Nothing
   ,mrules_file_       = maybestringopt "rules-file" rawopts
+  ,separator_         = fromMaybe ',' (maybecharopt "separator" rawopts)
   ,aliases_           = map (T.unpack . stripquotes . T.pack) $ listofstringopt "alias" rawopts
   ,anon_              = boolopt "anon" rawopts
   ,ignore_assertions_ = boolopt "ignore-assertions" rawopts

hledger-lib/Hledger/Read/CsvReader.hs

@@ -18,23 +18,25 @@ module Hledger.Read.CsvReader (
   reader,
   -- * Misc.
   CsvRecord,
+  CSV, Record, Field,
   -- rules,
   rulesFileFor,
   parseRulesFile,
   parseAndValidateCsvRules,
   expandIncludes,
   transactionFromCsvRecord,
+  printCSV,
   -- * Tests
   tests_CsvReader,
 )
 where
 import Prelude ()
-import "base-compat-batteries" Prelude.Compat hiding (getContents)
+import "base-compat-batteries" Prelude.Compat
 import Control.Exception hiding (try)
 import Control.Monad
 import Control.Monad.Except
 import Control.Monad.State.Strict (StateT, get, modify', evalStateT)
-import Data.Char (toLower, isDigit, isSpace)
+import Data.Char (toLower, isDigit, isSpace, ord)
 import "base-compat-batteries" Data.List.Compat
 import Data.List.NonEmpty (fromList)
 import Data.Maybe
@@ -42,6 +44,7 @@ import Data.Ord
 import qualified Data.Set as S
 import Data.Text (Text)
 import qualified Data.Text as T
+import qualified Data.Text.Encoding as T
 import qualified Data.Text.IO as T
 import Data.Time.Calendar (Day)
 #if MIN_VERSION_time(1,5,0)
@@ -53,17 +56,28 @@ import System.Locale (defaultTimeLocale)
 import Safe
 import System.Directory (doesFileExist)
 import System.FilePath
-import Text.CSV (parseCSV, CSV)
+import qualified Data.Csv as Cassava
+import qualified Data.Csv.Parser.Megaparsec as CassavaMP
+import qualified Data.ByteString as B
+import Data.ByteString.Lazy (fromStrict)
+import Data.Foldable
 import Text.Megaparsec hiding (parse)
 import Text.Megaparsec.Char
-import qualified Text.Parsec as Parsec
 import Text.Printf (printf)
+import Data.Word
 
 import Hledger.Data
-import Hledger.Utils.UTF8IOCompat (getContents)
 import Hledger.Utils
 import Hledger.Read.Common (Reader(..),InputOpts(..),amountp, statusp, genericSourcePos)
 
+type CSV = [Record]
+
+type Record = [Field]
+
+type Field = String
+
+data CSVError = CSVError (ParseError Word8 CassavaMP.ConversionError)
+    deriving Show
 
 reader :: Reader
 reader = Reader
@@ -78,7 +92,8 @@ reader = Reader
 parse :: InputOpts -> FilePath -> Text -> ExceptT String IO Journal
 parse iopts f t = do
   let rulesfile = mrules_file_ iopts
-  r <- liftIO $ readJournalFromCsv rulesfile f t
+  let separator = separator_ iopts
+  r <- liftIO $ readJournalFromCsv separator rulesfile f t
   case r of Left e -> throwError e
             Right j -> return $ journalNumberAndTieTransactions j
 -- XXX does not use parseAndFinaliseJournal like the other readers
@@ -94,9 +109,9 @@ parse iopts f t = do
 -- 4. if the rules file didn't exist, create it with the default rules and filename
 -- 5. return the transactions as a Journal
 -- @
-readJournalFromCsv :: Maybe FilePath -> FilePath -> Text -> IO (Either String Journal)
-readJournalFromCsv Nothing "-" _ = return $ Left "please use --rules-file when reading CSV from stdin"
-readJournalFromCsv mrulesfile csvfile csvdata =
+readJournalFromCsv :: Char -> Maybe FilePath -> FilePath -> Text -> IO (Either String Journal)
+readJournalFromCsv _ Nothing "-" _ = return $ Left "please use --rules-file when reading CSV from stdin"
+readJournalFromCsv separator mrulesfile csvfile csvdata =
  handle (\e -> return $ Left $ show (e :: IOException)) $ do
   let throwerr = throw.userError
 
@@ -124,7 +139,7 @@ readJournalFromCsv mrulesfile csvfile csvdata =
   records <- (either throwerr id .
               dbg2 "validateCsv" . validateCsv skip .
               dbg2 "parseCsv")
-             `fmap` parseCsv parsecfilename (T.unpack csvdata)
+             `fmap` parseCsv separator parsecfilename csvdata
   dbg1IO "first 3 csv records" $ take 3 records
 
   -- identify header lines
@@ -166,14 +181,41 @@ readJournalFromCsv mrulesfile csvfile csvdata =
 
   return $ Right nulljournal{jtxns=txns''}
 
-parseCsv :: FilePath -> String -> IO (Either Parsec.ParseError CSV)
-parseCsv path csvdata =
-  case path of
-    "-" -> liftM (parseCSV "(stdin)") getContents
-    _   -> return $ parseCSV path csvdata
+parseCsv :: Char -> FilePath -> Text -> IO (Either CSVError CSV)
+parseCsv separator filePath csvdata =
+  case filePath of
+    "-" -> liftM (parseCassava separator "(stdin)") T.getContents
+    _   -> return $ parseCassava separator filePath csvdata
+
+parseCassava :: Char -> FilePath -> Text -> Either CSVError CSV
+parseCassava separator path content =
+    case parseResult of
+        Left  msg -> Left $ CSVError msg
+        Right a   -> Right a
+    where parseResult = fmap parseResultToCsv $ CassavaMP.decodeWith (decodeOptions separator) Cassava.NoHeader path lazyContent
+          lazyContent = fromStrict $ T.encodeUtf8 content
+
+decodeOptions :: Char -> Cassava.DecodeOptions
+decodeOptions separator = Cassava.defaultDecodeOptions {
+                      Cassava.decDelimiter = fromIntegral (ord separator)
+                    }
+
+parseResultToCsv :: (Foldable t, Functor t) => t (t B.ByteString) -> CSV
+parseResultToCsv = toListList . unpackFields
+    where
+        toListList = toList . fmap toList
+        unpackFields  = (fmap . fmap) (T.unpack . T.decodeUtf8)
+
+printCSV :: CSV -> String
+printCSV records = unlined (printRecord `map` records)
+    where printRecord = concat . intersperse "," . map printField
+          printField f = "\"" ++ concatMap escape f ++ "\""
+          escape '"' = "\"\""
+          escape x = [x]
+          unlined = concat . intersperse "\n"
 
 -- | Return the cleaned up and validated CSV data (can be empty), or an error.
-validateCsv :: Int -> Either Parsec.ParseError CSV -> Either String [CsvRecord]
+validateCsv :: Int -> Either CSVError CSV -> Either String [CsvRecord]
 validateCsv _ (Left e) = Left $ show e
 validateCsv numhdrlines (Right rs) = validate $ drop numhdrlines $ filternulls rs
   where

hledger-lib/hledger-lib.cabal

@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 642c6b4607959713188c82341f1050872ec6111a64f8e4b4cc1c1630da585baf
+-- hash: 7d48cc897fb582a2600c3f3405a5463b853316f4a9fae370f0a74c46576a6198
 
 name:           hledger-lib
 version:        1.10.99
@@ -111,9 +111,10 @@ library
     , blaze-markup >=0.5.1
     , bytestring
     , call-stack
+    , cassava
+    , cassava-megaparsec
     , cmdargs >=0.10
     , containers
-    , csv
     , data-default >=0.5
     , deepseq
     , directory
@@ -209,9 +210,10 @@ test-suite doctests
     , blaze-markup >=0.5.1
     , bytestring
     , call-stack
+    , cassava
+    , cassava-megaparsec
     , cmdargs >=0.10
     , containers
-    , csv
     , data-default >=0.5
     , deepseq
     , directory
@@ -308,9 +310,10 @@ test-suite easytests
     , blaze-markup >=0.5.1
     , bytestring
     , call-stack
+    , cassava
+    , cassava-megaparsec
     , cmdargs >=0.10
     , containers
-    , csv
     , data-default >=0.5
     , deepseq
     , directory

hledger-lib/package.yaml

@@ -48,7 +48,8 @@ dependencies:
 - call-stack
 - cmdargs >=0.10
 - containers
-- csv
+- cassava
+- cassava-megaparsec
 - data-default >=0.5
 - Decimal
 - deepseq

hledger/Hledger/Cli/CliOptions.hs

@@ -120,6 +120,7 @@ inputflags :: [Flag RawOpts]
 inputflags = [
   flagReq  ["file","f"]      (\s opts -> Right $ setopt "file" s opts) "FILE" "use a different input file. For stdin, use - (default: $LEDGER_FILE or $HOME/.hledger.journal)"
  ,flagReq  ["rules-file"]    (\s opts -> Right $ setopt "rules-file" s opts) "RFILE" "CSV conversion rules file (default: FILE.rules)"
+ ,flagReq  ["separator"]     (\s opts -> Right $ setopt "separator" s opts) "SEPARATOR" "CSV separator (default: ,)"
  ,flagReq  ["alias"]         (\s opts -> Right $ setopt "alias" s opts)  "OLD=NEW" "rename accounts named OLD to NEW"
  ,flagNone ["anon"]          (setboolopt "anon") "anonymize accounts and payees"
  ,flagReq  ["pivot"]         (\s opts -> Right $ setopt "pivot" s opts)  "TAGNAME" "use some other field/tag for account names"

hledger/Hledger/Cli/Commands/Balance.hs

@@ -258,7 +258,7 @@ import qualified Data.Text as T
 import qualified Data.Text.Lazy as TL
 import System.Console.CmdArgs.Explicit as C
 import Lucid as L
-import Text.CSV
+import Test.HUnit()
 import Text.Printf (printf)
 import Text.Tabular as T
 --import Text.Tabular.AsciiWide
@@ -266,6 +266,7 @@ import Text.Tabular as T
 import Hledger
 import Hledger.Cli.CliOptions
 import Hledger.Cli.Utils
+import Hledger.Read.CsvReader (CSV, printCSV)
 
 
 -- | Command line options for this command.

hledger/Hledger/Cli/Commands/Print.hs

@@ -17,7 +17,8 @@ where
 import Data.Text (Text)
 import qualified Data.Text as T
 import System.Console.CmdArgs.Explicit
-import Text.CSV
+import Test.HUnit()
+import Hledger.Read.CsvReader (CSV, printCSV)
 
 import Hledger
 import Hledger.Cli.CliOptions

hledger/Hledger/Cli/Commands/Register.hs

@@ -20,13 +20,13 @@ import Data.Maybe
 -- import Data.Text (Text)
 import qualified Data.Text as T
 import System.Console.CmdArgs.Explicit
-import Text.CSV
+import Hledger.Read.CsvReader (CSV, Record, printCSV)
+import Test.HUnit()
 
 import Hledger
 import Hledger.Cli.CliOptions
 import Hledger.Cli.Utils
 
-
 registermode = (defCommandMode $ ["register"] ++ aliases) {
   modeHelp = "show postings and running total. With --date2, show and sort by secondary date instead." `withAliases` aliases
  ,modeGroupFlags = Group {

hledger/Hledger/Cli/CompoundBalanceCommand.hs

@@ -18,7 +18,7 @@ import Data.Maybe (fromMaybe)
 import qualified Data.Text as TS
 import qualified Data.Text.Lazy as TL
 import System.Console.CmdArgs.Explicit as C
-import Text.CSV
+import Hledger.Read.CsvReader (CSV, printCSV)
 import Lucid as L
 import Text.Tabular as T
 

hledger/hledger.cabal

@@ -2,7 +2,7 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 3be7e8745a826dbfc9d0007b9b37c3962486573614267365e6dafb8f7079ece6
+-- hash: 670748bbdefdd5950fbc676e79a7c3924edbe21ac333141915b5509e799fa071
 
 name:           hledger
 version:        1.10.99
@@ -120,7 +120,6 @@ library
     , bytestring
     , cmdargs >=0.10
     , containers
-    , csv
     , data-default >=0.5
     , directory
     , easytest
@@ -173,7 +172,6 @@ executable hledger
     , bytestring
     , cmdargs >=0.10
     , containers
-    , csv
     , data-default >=0.5
     , directory
     , easytest
@@ -228,7 +226,6 @@ test-suite test
     , bytestring
     , cmdargs >=0.10
     , containers
-    , csv
     , data-default >=0.5
     , directory
     , easytest
@@ -283,7 +280,6 @@ benchmark bench
     , cmdargs >=0.10
     , containers
     , criterion
-    , csv
     , data-default >=0.5
     , directory
     , easytest

hledger/package.yaml

@@ -85,7 +85,6 @@ dependencies:
 - bytestring
 - cmdargs >=0.10
 - containers
-- csv
 - data-default >=0.5
 - Decimal
 - directory

stack.yaml

@@ -9,7 +9,8 @@ packages:
 - hledger-web
 - hledger-api
 
-#extra-deps:
+extra-deps:
+- cassava-megaparsec-1.0.0
 
 nix:
   pure: false

tests/csv/csv-read.test

@@ -17,20 +17,21 @@
 # 2. reading CSV with in-field and out-field
  printf 'account1 Assets:MyAccount\ndate %%1\ndate-format %%d/%%Y/%%m\ndescription %%2\namount-in %%3\namount-out %%4\ncurrency $\n' >t.$$.csv.rules ; hledger -f csv:- --rules-file t.$$.csv.rules print && rm -rf t.$$.csv.rules
 <<<
-10/2009/09,Flubber Co,50,
-11/2009/09,Flubber Co,,50
+10/2009/09,Flubber Co🎅,50,
+11/2009/09,Flubber Co🎅,,50
 >>>
-2009/09/10 Flubber Co
+2009/09/10 Flubber Co🎅
     Assets:MyAccount             $50
     income:unknown              $-50
 
-2009/09/11 Flubber Co
+2009/09/11 Flubber Co🎅
     Assets:MyAccount            $-50
     expenses:unknown             $50
 
 >>>2
 >>>=0
 
+
 # 3. handle conditions assigning multiple fields
  printf 'fields date, description, amount\ndate-format %%d/%%Y/%%m\ncurrency $\naccount1 assets:myacct\nif Flubber\n  account2 acct\n  comment cmt' >t.$$.csv.rules; printf '10/2009/09,Flubber Co,50\n' | hledger -f csv:- --rules-file t.$$.csv.rules print && rm -rf t.$$.csv.rules
 >>>
@@ -92,3 +93,20 @@
 
 >>>2
 >>>=0
+
+# 8. reading CSV with custom separator
+ printf 'account1 Assets:MyAccount\ndate %%1\ndate-format %%d/%%Y/%%m\ndescription %%2\namount-in %%3\namount-out %%4\ncurrency $\n' >t.$$.csv.rules ; hledger --separator ';' -f csv:- --rules-file t.$$.csv.rules print && rm -rf t.$$.csv.rules
+<<<
+10/2009/09;Flubber Co🎅;50;
+11/2009/09;Flubber Co🎅;;50
+>>>
+2009/09/10 Flubber Co🎅
+    Assets:MyAccount             $50
+    income:unknown              $-50
+
+2009/09/11 Flubber Co🎅
+    Assets:MyAccount            $-50
+    expenses:unknown             $50
+
+>>>2
+>>>=0