diff options
| author |  Joey Hess <joeyh@joeyh.name> | 2015-07-09 11:49:52 -0400 |
|---|---|---|
| committer | Joey Hess <joeyh@joeyh.name> | 2015-07-09 11:52:47 -0400 |
| commit | 6ddffe0f0e64a87fd924f736941fa242e0d740a6 (patch) | |
| tree | 94bc5fed6512ea3cfab47b274cf5534edf889b77 /CmdLine/Usage.hs | |
| parent | 1e4c1adeae64baa4eb30fd7e1171620c27e0e17f (diff) | |
let optparse-applicative handle the usage display when run w/o command or bad command
Still generating the list of commands myself, to get it sorted into
sections and with short synopses.
Diffstat (limited to 'CmdLine/Usage.hs')
| -rw-r--r-- | CmdLine/Usage.hs | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/CmdLine/Usage.hs b/CmdLine/Usage.hs index 0b1cade05..a6cc90a71 100644 --- a/CmdLine/Usage.hs +++ b/CmdLine/Usage.hs @@ -13,9 +13,12 @@ import Types.Command usageMessage :: String -> String usageMessage s = "Usage: " ++ s -{- Usage message with lists of commands by section. -} usage :: String -> [Command] -> String -usage header cmds = unlines $ usageMessage header : concatMap go [minBound..] +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 = [] @@ -39,6 +42,7 @@ usage header cmds = unlines $ usageMessage header : concatMap go [minBound..] 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 |