264 lines
11 KiB
Haskell
264 lines
11 KiB
Haskell
{-|
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hledger - a ledger-compatible accounting tool.
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Copyright (c) 2007-2011 Simon Michael <simon@joyful.com>
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Released under GPL version 3 or later.
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hledger is a partial haskell clone of John Wiegley's "ledger". It
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generates ledger-compatible register & balance reports from a plain text
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journal, and demonstrates a functional implementation of ledger.
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For more information, see http:\/\/hledger.org .
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This module provides the main function for the hledger command-line
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executable. It is exposed here so that it can be imported by eg benchmark
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scripts.
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You can use the command line:
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> $ hledger --help
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or ghci:
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> $ ghci hledger
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> > j <- readJournalFile Nothing Nothing True "examples/sample.journal"
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> > register [] ["income","expenses"] j
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> 2008/01/01 income income:salary $-1 $-1
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> 2008/06/01 gift income:gifts $-1 $-2
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> 2008/06/03 eat & shop expenses:food $1 $-1
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> expenses:supplies $1 0
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> > balance [Depth "1"] [] l
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> $-1 assets
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> $2 expenses
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> $-2 income
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> $1 liabilities
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> > l <- myLedger
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See "Hledger.Data.Ledger" for more examples.
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-}
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{-# LANGUAGE QuasiQuotes #-}
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module Hledger.Cli.Main where
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import Data.Char (isDigit)
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import Data.List
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import Data.String.Here
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import Safe
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import System.Console.CmdArgs.Explicit as C
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import System.Environment
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import System.Exit
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import System.FilePath
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import System.Process
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import Text.Printf
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import Hledger (ensureJournalFileExists)
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import Hledger.Cli.CliOptions
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import Hledger.Cli.Commands
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import Hledger.Cli.Utils
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import Hledger.Cli.Version
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import Hledger.Data.Dates (getCurrentDay)
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import Hledger.Reports.ReportOptions (period_, interval_, queryFromOpts)
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import Hledger.Utils
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-- | The overall cmdargs mode describing hledger's command-line options and subcommands.
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mainmode addons = defMode {
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modeNames = [progname ++ " [CMD]"]
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,modeArgs = ([], Just $ argsFlag "[ARGS]")
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,modeHelp = unlines ["hledger's main command line interface. Runs builtin commands and other hledger executables. Type \"hledger\" to list available commands."]
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,modeGroupModes = Group {
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-- subcommands in the unnamed group, shown first:
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groupUnnamed = [
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]
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-- subcommands in named groups:
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,groupNamed = [
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]
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-- subcommands handled but not shown in the help:
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,groupHidden = map fst builtinCommands ++ map quickAddonCommandMode addons
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}
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,modeGroupFlags = Group {
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-- flags in named groups:
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groupNamed = [
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( "General input flags", inputflags)
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,("\nGeneral reporting flags", reportflags)
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,("\nGeneral help flags", helpflags)
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]
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-- flags in the unnamed group, shown last:
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,groupUnnamed = []
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-- flags handled but not shown in the help:
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,groupHidden =
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[detailedversionflag]
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-- ++ inputflags -- included here so they'll not raise a confusing error if present with no COMMAND
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}
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,modeHelpSuffix = lines $ regexReplace "PROGNAME" progname [here|Examples:
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PROGNAME list commands
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PROGNAME CMD [--] [OPTS] [ARGS] run a command (use -- with addon commands)
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PROGNAME-CMD [OPTS] [ARGS] or run addon commands directly
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PROGNAME -h show general usage
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PROGNAME CMD -h show command usage
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PROGNAME help [MANUAL] show any of the hledger manuals in various formats
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|]
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}
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-- | Let's go!
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main :: IO ()
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main = do
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-- Choose and run the appropriate internal or external command based
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-- on the raw command-line arguments, cmdarg's interpretation of
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-- same, and hledger-* executables in the user's PATH. A somewhat
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-- complex mishmash of cmdargs and custom processing, hence all the
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-- debugging support and tests. See also Hledger.Cli.CliOptions and
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-- command-line.test.
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-- some preliminary (imperfect) argument parsing to supplement cmdargs
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args <- getArgs
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let
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args' = moveFlagsAfterCommand args
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isFlag = ("-" `isPrefixOf`)
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isNonEmptyNonFlag s = not (isFlag s) && not (null s)
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rawcmd = headDef "" $ takeWhile isNonEmptyNonFlag args'
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isNullCommand = null rawcmd
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(argsbeforecmd, argsaftercmd') = break (==rawcmd) args
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argsaftercmd = drop 1 argsaftercmd'
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dbgIO :: Show a => String -> a -> IO ()
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dbgIO = tracePrettyAtIO 2
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dbgIO "running" prognameandversion
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dbgIO "raw args" args
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dbgIO "raw args rearranged for cmdargs" args'
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dbgIO "raw command is probably" rawcmd
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dbgIO "raw args before command" argsbeforecmd
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dbgIO "raw args after command" argsaftercmd
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-- Search PATH for add-ons, excluding any that match built-in command names
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addons' <- hledgerAddons
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let addons = filter (not . (`elem` builtinCommandNames) . dropExtension) addons'
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-- parse arguments with cmdargs
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opts <- argsToCliOpts args addons
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-- select an action and run it.
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let
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cmd = command_ opts -- the full matched internal or external command name, if any
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isInternalCommand = cmd `elem` builtinCommandNames -- not (null cmd) && not (cmd `elem` addons)
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isExternalCommand = not (null cmd) && cmd `elem` addons -- probably
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isBadCommand = not (null rawcmd) && null cmd
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hasVersion = ("--version" `elem`)
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hasDetailedVersion = ("--version+" `elem`)
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printUsage = putStr $ showModeUsage $ mainmode addons
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badCommandError = error' ("command "++rawcmd++" is not recognized, run with no command to see a list") >> exitFailure
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hasHelpFlag args = any (`elem` args) ["-h","--help"]
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f `orShowHelp` mode
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| hasHelpFlag args = putStr $ showModeUsage mode
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| otherwise = f
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dbgIO "processed opts" opts
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dbgIO "command matched" cmd
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dbgIO "isNullCommand" isNullCommand
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dbgIO "isInternalCommand" isInternalCommand
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dbgIO "isExternalCommand" isExternalCommand
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dbgIO "isBadCommand" isBadCommand
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d <- getCurrentDay
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dbgIO "period from opts" (period_ $ reportopts_ opts)
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dbgIO "interval from opts" (interval_ $ reportopts_ opts)
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dbgIO "query from opts & args" (queryFromOpts d $ reportopts_ opts)
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let
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runHledgerCommand
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-- high priority flags and situations. -h, then --help, then --info are highest priority.
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| hasHelpFlag argsbeforecmd = dbgIO "" "-h before command, showing general usage" >> printUsage
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| not (hasHelpFlag argsaftercmd) && (hasVersion argsbeforecmd || (hasVersion argsaftercmd && isInternalCommand))
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= putStrLn prognameandversion
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| not (hasHelpFlag argsaftercmd) && (hasDetailedVersion argsbeforecmd || (hasDetailedVersion argsaftercmd && isInternalCommand))
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= putStrLn prognameanddetailedversion
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-- \| (null externalcmd) && "binary-filename" `inRawOpts` rawopts = putStrLn $ binaryfilename progname
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-- \| "--browse-args" `elem` args = System.Console.CmdArgs.Helper.execute "cmdargs-browser" mainmode' args >>= (putStr . show)
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| isNullCommand = dbgIO "" "no command, showing commands list" >> printCommandsList addons
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| isBadCommand = badCommandError
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-- builtin commands
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| Just (cmdmode, cmdaction) <- findCommand cmd = do
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if cmd=="add" -- add command does extra work before reading journal
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then (do
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journalFilePathFromOpts opts >>= (ensureJournalFileExists . head)
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withJournalDo opts cmdaction)
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`orShowHelp` cmdmode
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else
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withJournalDo opts cmdaction `orShowHelp` cmdmode
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-- addon commands
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| isExternalCommand = do
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let externalargs = argsbeforecmd ++ filter (not.(=="--")) argsaftercmd
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let shellcmd = printf "%s-%s %s" progname cmd (unwords' externalargs) :: String
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dbgIO "external command selected" cmd
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dbgIO "external command arguments" (map quoteIfNeeded externalargs)
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dbgIO "running shell command" shellcmd
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system shellcmd >>= exitWith
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-- deprecated commands
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-- cmd == "convert" = error' (modeHelp oldconvertmode) >> exitFailure
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-- shouldn't reach here
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| otherwise = usageError ("could not understand the arguments "++show args) >> exitFailure
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runHledgerCommand
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-- | Parse hledger CLI options from these command line arguments and
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-- add-on command names, or raise any error.
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argsToCliOpts :: [String] -> [String] -> IO CliOpts
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argsToCliOpts args addons = do
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let
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args' = moveFlagsAfterCommand args
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cmdargsopts = either usageError id $ process (mainmode addons) args'
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cmdargsopts' = decodeRawOpts cmdargsopts
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rawOptsToCliOpts cmdargsopts'
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-- | A hacky workaround for cmdargs not accepting flags before the
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-- subcommand name: try to detect and move such flags after the
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-- command. This allows the user to put them in either position.
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-- The order of options is not preserved, but this should be ok.
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--
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-- Since we're not parsing flags as precisely as cmdargs here, this is
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-- imperfect. We make a decent effort to:
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-- - move all no-argument help/input/report flags
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-- - move all required-argument help/input/report flags along with their values, space-separated or not
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-- - not confuse things further or cause misleading errors.
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moveFlagsAfterCommand :: [String] -> [String]
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moveFlagsAfterCommand args = moveArgs $ ensureDebugHasArg args
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where
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-- quickly! make sure --debug has a numeric argument, or this all goes to hell
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ensureDebugHasArg as =
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case break (=="--debug") as of
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(bs,"--debug":c:cs) | null c || not (all isDigit c) -> bs++"--debug=1":c:cs
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(bs,"--debug":[]) -> bs++"--debug=1":[]
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_ -> as
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-- -h ..., --version ...
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moveArgs (f:a:as) | isMovableNoArgFlag f = (moveArgs $ a:as) ++ [f]
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-- -f FILE ..., --alias ALIAS ...
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moveArgs (f:v:a:as) | isMovableReqArgFlag f, isValue v = (moveArgs $ a:as) ++ [f,v]
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-- -fFILE ..., --alias=ALIAS ...
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moveArgs (fv:a:as) | isMovableReqArgFlagAndValue fv = (moveArgs $ a:as) ++ [fv]
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-- -f(missing arg)
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moveArgs (f:a:as) | isMovableReqArgFlag f, not (isValue a) = (moveArgs $ a:as) ++ [f]
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-- anything else
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moveArgs as = as
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isMovableNoArgFlag a = "-" `isPrefixOf` a && dropWhile (=='-') a `elem` noargflagstomove
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isMovableReqArgFlag a = "-" `isPrefixOf` a && dropWhile (=='-') a `elem` reqargflagstomove
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isMovableReqArgFlagAndValue ('-':'-':a:as) = case break (== '=') (a:as) of (f:fs,_:_) -> (f:fs) `elem` reqargflagstomove
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_ -> False
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isMovableReqArgFlagAndValue ('-':shortflag:_:_) = [shortflag] `elem` reqargflagstomove
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isMovableReqArgFlagAndValue _ = False
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isValue "-" = True
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isValue ('-':_) = False
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isValue _ = True
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flagstomove = inputflags ++ reportflags ++ helpflags
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noargflagstomove = concatMap flagNames $ filter ((==FlagNone).flagInfo) flagstomove
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reqargflagstomove = -- filter (/= "debug") $
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concatMap flagNames $ filter ((==FlagReq ).flagInfo) flagstomove
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