cli/Hcompta/CLI/Command.hs

   1 {-# LANGUAGE NamedFieldPuns #-}
   2 {-# LANGUAGE OverloadedStrings #-}
   3 {-# LANGUAGE TupleSections #-}
   4 module Hcompta.CLI.Command where
   5
   6 import qualified Data.Text.Lazy as TL
   7 import           System.Console.GetOpt
   8                  ( ArgDescr(..)
   9                  , OptDescr(..)
  10                  , usageInfo )
  11 import           System.Environment (getProgName)
  12 import           System.Exit (exitWith, ExitCode(..))
  13 import qualified System.IO as IO
  14
  15 import           Hcompta.CLI.Context (Context)
  16 import qualified Hcompta.CLI.Args as Args
  17 import qualified Hcompta.CLI.Command.Balance as Command.Balance
  18 import qualified Hcompta.CLI.Command.Print   as Command.Print
  19 import qualified Hcompta.CLI.Context as Context
  20 import qualified Hcompta.CLI.Write as Write
  21 import qualified Hcompta.Lib.Leijen as W
  22 import           Hcompta.Lib.Leijen ((<>))
  23
  24 usage :: IO String
  25 usage = do
  26         bin <- getProgName
  27         return $ unlines $
  28                 [ "SYNTAX "
  29                 , "  "++bin++" [option..] <command> [arguments]"
  30                 , ""
  31                 , usageInfo "OPTIONS" options
  32                 , "COMMANDS (use "++bin++" <command> --help for specific help)"
  33                 , "  balance [-i FILE]"
  34                 , "  print   [-i FILE]"
  35                 ]
  36
  37 options :: Args.Options Context
  38 options =
  39         [ Option "h" ["help"]
  40          (NoArg (\_opts _context -> do
  41                 usage >>= IO.hPutStr IO.stderr
  42                 exitWith ExitSuccess))
  43          "show this help"
  44         , Option "v" ["verbosity"]
  45          (OptArg (\arg _context context ->
  46                 case arg of
  47                  Nothing      ->
  48                         case Context.verbosity context of
  49                          v | v < maxBound ->
  50                                 return $ context{Context.verbosity=succ v}
  51                          _ -> return $ context
  52                  Just "error" -> return $ context{Context.verbosity=Context.Verbosity_Error}
  53                  Just "warn"  -> return $ context{Context.verbosity=Context.Verbosity_Warn}
  54                  Just "info"  -> return $ context{Context.verbosity=Context.Verbosity_Info}
  55                  Just "debug" -> return $ context{Context.verbosity=Context.Verbosity_Debug}
  56                  Just _       -> Write.fatal context $
  57                         W.text "--verbosity option expects \"error\", \"warn\", \"info\", or \"debug\" as value")
  58                 "error|warn|info|debug"
  59                 )
  60          "increment or set verbosity level, can be use multiple times"
  61         , Option "" ["color"]
  62          (OptArg (\arg _context context -> do
  63                 color <- case arg of
  64                  Nothing       -> return $ Just True
  65                  Just "always" -> return $ Just True
  66                  Just "never"  -> return $ Just False
  67                  Just "auto"   -> return $ Nothing
  68                  Just _        -> Write.fatal context $
  69                         W.text "--color option expects \"always\", \"auto\", or \"never\" as value"
  70                 return $ context{Context.color})
  71           "[always|auto|never]")
  72          "colorize output"
  73         , Option "" ["lang"]
  74          (ReqArg (\lang _context context -> do
  75                 return $ context{Context.langs=
  76                         lang:Context.langs context})
  77           "[xx|xx-XX]")
  78          "RFC1766 / ISO 639-1 language code (eg, fr, en-GB, etc.)"
  79         ]
  80
  81 run :: Context -> String -> [String] -> IO ()
  82 run context cmd args =
  83         case cmd of
  84          "print"   -> Command.Print.run   context args
  85          "balance" -> Command.Balance.run context args
  86          _ -> usage >>= Write.fatal context .
  87                 ((W.text "unknown command: " <> (W.text $ TL.pack cmd) <> W.line) <>) .
  88                 W.text . TL.pack