+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE OverloadedStrings #-}
--- | The program will parse ~/.twatrc for any available configuration
+-- | The program will parse ~/.halcyonrc for any available configuration
-- directives, resulting in an OptionalCfg. The command-line
-- arguments will be used to create another OptionalCfg, and the two
-- will be merged. Finally, a default_config will be updated from
-- the merged OptionalCfgs.
--
-module OptionalConfiguration
+module OptionalConfiguration (
+ OptionalCfg(..),
+ from_rc )
where
-import Data.Monoid (Monoid(..))
-import qualified Data.Configurator as DC
+import qualified Data.Configurator as DC (
+ Worth (Optional),
+ load,
+ lookup )
--- The same as Cfg, except everything is optional. It's easy to merge
--- two of these by simply dropping the Nothings in favor of the Justs.
+import Data.Data ( Data )
+import Data.Maybe ( fromMaybe )
+import Data.Monoid ( Monoid(..) )
+import Data.Typeable ( Typeable )
+import Paths_halcyon ( getSysconfDir )
+import System.Directory ( getHomeDirectory )
+import System.FilePath ( (</>) )
+import System.IO ( hPutStrLn, stderr )
+import System.IO.Error ( catchIOError )
+
+import Usernames ( Usernames(..) )
+
+
+-- | The same as Cfg, except everything is optional. It's easy to
+-- merge two of these by simply dropping the Nothings in favor of
+-- the Justs. The 'usernames' are left un-maybed so that cmdargs
+-- can parse more than one of them.
+--
data OptionalCfg =
- OptionalCfg { consumer_key :: Maybe String,
- consumer_secret :: Maybe String,
+ OptionalCfg { access_secret :: Maybe String,
access_token :: Maybe String,
- access_secret :: Maybe String,
+ consumer_key :: Maybe String,
+ consumer_secret :: Maybe String,
+ daemonize :: Maybe Bool,
+ from_address :: Maybe String,
heartbeat :: Maybe Int,
ignore_replies :: Maybe Bool,
ignore_retweets :: Maybe Bool,
+ pidfile :: Maybe FilePath,
+ run_as_group :: Maybe String,
+ run_as_user :: Maybe String,
sendmail_path :: Maybe String,
- from_address :: Maybe String,
to_address :: Maybe String,
+ usernames :: Usernames,
verbose :: Maybe Bool }
+ deriving (Show, Data, Typeable)
instance Monoid OptionalCfg where
mempty = OptionalCfg
Nothing
Nothing
Nothing
+ Nothing
+ Nothing
+ Nothing
+ mempty
+ Nothing
cfg1 `mappend` cfg2 =
OptionalCfg
+ (merge (access_secret cfg1) (access_secret cfg2))
+ (merge (access_token cfg1) (access_token cfg2))
(merge (consumer_key cfg1) (consumer_key cfg2))
(merge (consumer_secret cfg1) (consumer_secret cfg2))
- (merge (access_token cfg1) (access_token cfg2))
- (merge (access_secret cfg1) (access_secret cfg2))
+ (merge (daemonize cfg1) (daemonize cfg2))
+ (merge (from_address cfg1) (from_address cfg2))
(merge (heartbeat cfg1) (heartbeat cfg2))
(merge (ignore_replies cfg1) (ignore_replies cfg2))
(merge (ignore_retweets cfg1) (ignore_retweets cfg2))
+ (merge (pidfile cfg1) (pidfile cfg2))
+ (merge (run_as_group cfg1) (run_as_group cfg2))
+ (merge (run_as_user cfg1) (run_as_user cfg2))
(merge (sendmail_path cfg1) (sendmail_path cfg2))
- (merge (from_address cfg1) (from_address cfg2))
(merge (to_address cfg1) (to_address cfg2))
+ ((usernames cfg1) `mappend` (usernames cfg2))
(merge (verbose cfg1) (verbose cfg2))
where
merge :: (Maybe a) -> (Maybe a) -> (Maybe a)
merge Nothing (Just x) = Just x
merge (Just _) (Just y) = Just y
+
+
+-- | Obtain an 'OptionalCfg' from halcyonrc in either the global
+-- configuration directory or the user's home directory. The one in
+-- $HOME is prefixed by a dot so that it is hidden.
+--
+-- We make an attempt at cross-platform compatibility; we will try
+-- to find the correct directory even on Windows. But if the calls
+-- to getHomeDirectory/getSysconfDir fail for whatever reason, we
+-- fall back to using the Unix-specific /etc and $HOME.
+--
from_rc :: IO OptionalCfg
from_rc = do
- cfg <- DC.load [ DC.Optional "$(HOME)/.twatrc" ]
+ etc <- catchIOError
+ getSysconfDir (\e -> do hPutStrLn stderr ("ERROR: " ++ (show e))
+ return "/etc")
+ home <- catchIOError
+ getHomeDirectory (\e -> do hPutStrLn stderr ("ERROR: " ++ (show e))
+ return "$(HOME)")
+
+ let global_config_path = etc </> "halcyonrc"
+ let user_config_path = home </> ".halcyonrc"
+ cfg <- DC.load [ DC.Optional global_config_path,
+ DC.Optional user_config_path ]
+
+ cfg_access_secret <- DC.lookup cfg "access-secret"
+ cfg_access_token <- DC.lookup cfg "access-token"
cfg_consumer_key <- DC.lookup cfg "consumer-key"
cfg_consumer_secret <- DC.lookup cfg "consumer-secret"
- cfg_access_token <- DC.lookup cfg "access-token"
- cfg_access_secret <- DC.lookup cfg "access-secret"
+ cfg_daemonize <- DC.lookup cfg "daemonize"
+ cfg_from_address <- DC.lookup cfg "from"
cfg_heartbeat <- DC.lookup cfg "heartbeat"
cfg_ignore_replies <- DC.lookup cfg "ignore-replies"
cfg_ignore_retweets <- DC.lookup cfg "ignore-retweets"
+ cfg_pidfile <- DC.lookup cfg "pidfile"
+ cfg_run_as_group <- DC.lookup cfg "run_as_group"
+ cfg_run_as_user <- DC.lookup cfg "run_as_user"
cfg_sendmail_path <- DC.lookup cfg "sendmail-path"
- cfg_from_address <- DC.lookup cfg "from"
cfg_to_address <- DC.lookup cfg "to"
+ cfg_usernames <- DC.lookup cfg "usernames"
cfg_verbose <- DC.lookup cfg "verbose"
+
return $ OptionalCfg
+ cfg_access_secret
+ cfg_access_token
cfg_consumer_key
cfg_consumer_secret
- cfg_access_token
- cfg_access_secret
+ cfg_daemonize
+ cfg_from_address
cfg_heartbeat
cfg_ignore_replies
cfg_ignore_retweets
+ cfg_pidfile
+ cfg_run_as_group
+ cfg_run_as_user
cfg_sendmail_path
- cfg_from_address
cfg_to_address
+ (fromMaybe mempty cfg_usernames)
cfg_verbose
-
projects / dead / halcyon.git / blobdiff