update example scripts for api, clarify -f support

extra/hledger-accountnames.hs

@@ -2,8 +2,15 @@
 -- Show all account names used in the default journal.
 
 import Hledger
+import Hledger.Cli (getCliOpts, mainmode, withJournalDo)
 
 main = do
-  j <- defaultJournal
-  let l = ledgerFromJournal Any j
-  mapM_ putStrLn $ ledgerAccountNames l
+  -- simple way to read ~/.hledger.journal or $LEDGER_FILE
+  -- j <- defaultJournal
+
+  -- but we'd better handle -f as well:
+  opts <- getCliOpts $ mainmode []
+  withJournalDo opts $ \_opts j -> do
+
+  -- query the journal for all account names and print each one
+  mapM_ putStrLn $ journalAccountNames j

extra/hledger-balance-csv.hs

@@ -26,7 +26,7 @@ main = getCliOpts argsmode >>= printBalanceCsv
 printBalanceCsv opts = withJournalDo opts $
   \CliOpts{reportopts_=ropts} j -> do
     d <- getCurrentDay
-    let (items,_) = accountsReport ropts (queryFromOpts d ropts) j
+    let (items,_) = balanceReport ropts (queryFromOpts d ropts) j
     putStrLn $ printCSV $
       ["account","balance"] :
       [[a, showMixedAmountWithoutPrice b] | (a, _, _, b) <- items]

extra/hledger-equity.hs

@@ -17,12 +17,13 @@ import Hledger.Cli
 import System.Environment
 
 main = do
+  putStrLn "(-f option not supported, see hledger-accountnames.hs for how to add it)"
   j <- defaultJournal
   d <- getCurrentDay
   args <- getArgs
   let query = Or $ map Acct args
       ropts = defreportopts{flat_=True}
-      (acctbals,_) = accountsReport ropts query j
+      (acctbals,_) = balanceReport ropts query j
       balancingamt = negate $ sum $ map (\(_,_,_,b) -> b) acctbals
       ps = [posting{paccount=a, pamount=b} | (a,_,_,b) <- acctbals]
            ++ [posting{paccount="equity:opening balances", pamount=balancingamt}]

extra/hledger-print-unique.hs

@@ -13,6 +13,7 @@ import Hledger
 import Hledger.Cli
 
 main = do
+  putStrLn "(-f option not supported)"
   opts <- getCliOpts (defCommandMode ["hledger-print-unique"])
   withJournalDo opts $
     \opts j@Journal{jtxns=ts} -> print' opts j{jtxns=uniquify ts}