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1 files changed, 40 insertions, 0 deletions

diff --git a/hsm-core/Hsm/Core/Options.hs b/hsm-core/Hsm/Core/Options.hs
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+++ b/hsm-core/Hsm/Core/Options.hs
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+{-# LANGUAGE OverloadedStrings #-}
+
+module Hsm.Core.Options
+  ( Options(Options)
+  , options
+  ) where
+
+import Control.Applicative ((<**>))
+import Data.Text (Text, pack, unpack)
+import Effectful.Log (LogLevel(LogInfo), readLogLevelEither, showLogLevel)
+import Options.Applicative qualified as P
+import Options.Applicative.Text qualified as P
+
+data Options =
+  Options Text LogLevel
+
+parser :: P.Parser Options
+parser =
+  Options
+    <$> P.textOption
+          (P.help "Path to services config file"
+             <> P.short 'c'
+             <> P.long "config"
+             <> P.metavar "PATH"
+             <> P.value "servconf.yaml"
+             <> P.showDefault)
+    <*> P.option
+          (P.eitherReader $ readLogLevelEither . pack)
+          (P.help "Log level"
+             <> P.short 'l'
+             <> P.long "log-level"
+             <> P.metavar "LEVEL"
+             <> P.value LogInfo
+             <> P.showDefaultWith (unpack . showLogLevel))
+
+options :: Text -> IO Options
+options name =
+  P.customExecParser (P.prefs $ P.columns 100)
+    $ P.info (parser <**> P.helper)
+    $ P.fullDesc <> P.progDesc ("Launch " <> unpack name <> " service")