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{- git-annex usage messages
-
- Copyright 2010-2015 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module CmdLine.Usage where
import Annex.Common
import Types.Command
usageMessage :: String -> String
usageMessage s = "Usage: " ++ s
usage :: String -> [Command] -> String
usage header cmds = unlines $ usageMessage header : commandList cmds
{- Commands listed by section, with breif usage and description. -}
commandList :: [Command] -> [String]
commandList cmds = concatMap go [minBound..]
where
go section
| null cs = []
| otherwise =
[ ""
, descSection section ++ ":"
, ""
] ++ map cmdline cs
where
cs = filter (\c -> cmdsection c == section) scmds
cmdline c = concat
[ cmdname c
, namepad (cmdname c)
, cmdparamdesc c
, descpad (cmdparamdesc c)
, cmddesc c
]
pad n s = replicate (n - length s) ' '
namepad = pad $ longest cmdname + 1
descpad = pad $ longest cmdparamdesc + 2
longest f = foldl max 0 $ map (length . f) cmds
scmds = sort cmds
{- Descriptions of params used in usage messages. -}
paramPaths :: String
paramPaths = paramRepeating paramPath -- most often used
paramPath :: String
paramPath = "PATH"
paramKey :: String
paramKey = "KEY"
paramDesc :: String
paramDesc = "DESC"
paramUrl :: String
paramUrl = "URL"
paramNumber :: String
paramNumber = "NUMBER"
paramNumRange :: String
paramNumRange = "NUM|RANGE"
paramRemote :: String
paramRemote = "REMOTE"
paramField :: String
paramField = "FIELD"
paramGlob :: String
paramGlob = "GLOB"
paramName :: String
paramName = "NAME"
paramValue :: String
paramValue = "VALUE"
paramUUID :: String
paramUUID = "UUID"
paramType :: String
paramType = "TYPE"
paramDate :: String
paramDate = "DATE"
paramTime :: String
paramTime = "TIME"
paramFormat :: String
paramFormat = "FORMAT"
paramFile :: String
paramFile = "FILE"
paramRef :: String
paramRef = "REF"
paramRefSpec :: String
paramRefSpec = "REFSPEC"
paramGroup :: String
paramGroup = "GROUP"
paramExpression :: String
paramExpression = "EXPR"
paramSize :: String
paramSize = "SIZE"
paramAddress :: String
paramAddress = "ADDRESS"
paramItem :: String
paramItem = "ITEM"
paramKeyValue :: String
paramKeyValue = "K=V"
paramNothing :: String
paramNothing = ""
paramRepeating :: String -> String
paramRepeating s = s ++ " ..."
paramOptional :: String -> String
paramOptional s = s
paramPair :: String -> String -> String
paramPair a b = a ++ " " ++ b
|
