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refactor: use optString and move overrideFrom

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steve-chavez
2021-01-22 15:56:08 -05:00
committed by Steve Chavez
parent 125ea8f6d9
commit 4344cc9202
1 changed files with 22 additions and 25 deletions
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src/PostgREST/Config.hs
+22 -25
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@@ -394,27 +394,9 @@ readAppConfig dbSettings env optPath = do
fromEnv = M.mapKeys fromJust $ M.filterWithKey (\k _ -> isJust k) $ M.mapKeys normalize env
normalize k = ("app.settings." <>) <$> stripPrefix "PGRST_APP_SETTINGS_" (toS k)
overrideFromDbOrEnvironment :: JustIfMaybe a b =>
(C.Key -> C.Parser C.Value a -> C.Parser C.Config b) ->
C.Key -> (C.Value -> a) -> C.Parser C.Config b
overrideFromDbOrEnvironment necessity key coercion =
case reloadableDbSetting <|> M.lookup name env of
Just dbOrEnvVal -> pure $ justIfMaybe $ coercion $ C.String dbOrEnvVal
Nothing -> necessity key (coercion <$> C.value)
where
name = "PGRST_" <> map capitalize (toS key)
capitalize '-' = '_'
capitalize c = toUpper c
reloadableDbSetting =
if key `notElem` [
"server-host", "server-port", "server-unix-socket", "server-unix-socket-mode", "log-level",
"db-anon-role", "db-uri", "db-channel-enabled", "db-channel", "db-pool", "db-pool-timeout", "db-load-guc-config"]
then lookup key dbSettings
else Nothing
parseSocketFileMode :: C.Key -> C.Parser C.Config (Either Text FileMode)
parseSocketFileMode k =
overrideFromDbOrEnvironment C.optional k coerceText >>= \case
optString k >>= \case
Nothing -> pure $ Right 432 -- return default 660 mode if no value was provided
Just fileModeText ->
case (readOct . unpack) fileModeText of
@@ -427,18 +409,16 @@ readAppConfig dbSettings env optPath = do
parseJwtAudience :: C.Key -> C.Parser C.Config (Maybe StringOrURI)
parseJwtAudience k =
overrideFromDbOrEnvironment C.optional k coerceText >>= \case
optString k >>= \case
Nothing -> pure Nothing -- no audience in config file
Just aud -> case preview stringOrUri (unpack aud) of
Nothing -> fail "Invalid Jwt audience. Check your configuration."
(Just "") -> pure Nothing
aud' -> pure aud'
parseLogLevel :: C.Key -> C.Parser C.Config LogLevel
parseLogLevel k =
overrideFromDbOrEnvironment C.optional k coerceText >>= \case
optString k >>= \case
Nothing -> pure LogError
Just "" -> pure LogError
Just "crit" -> pure LogCrit
Just "error" -> pure LogError
Just "warn" -> pure LogWarn
@@ -447,10 +427,9 @@ readAppConfig dbSettings env optPath = do
parseTxEnd :: C.Key -> ((Bool, Bool) -> Bool) -> C.Parser C.Config Bool
parseTxEnd k f =
overrideFromDbOrEnvironment C.optional k coerceText >>= \case
optString k >>= \case
-- RollbackAll AllowOverride
Nothing -> pure $ f (False, False)
Just "" -> pure $ f (False, False)
Just "commit" -> pure $ f (False, False)
Just "commit-allow-override" -> pure $ f (False, True)
Just "rollback" -> pure $ f (True, False)
@@ -487,6 +466,24 @@ readAppConfig dbSettings env optPath = do
optBool :: C.Key -> C.Parser C.Config (Maybe Bool)
optBool k = join <$> overrideFromDbOrEnvironment C.optional k coerceBool
overrideFromDbOrEnvironment :: JustIfMaybe a b =>
(C.Key -> C.Parser C.Value a -> C.Parser C.Config b) ->
C.Key -> (C.Value -> a) -> C.Parser C.Config b
overrideFromDbOrEnvironment necessity key coercion =
case reloadableDbSetting <|> M.lookup name env of
Just dbOrEnvVal -> pure $ justIfMaybe $ coercion $ C.String dbOrEnvVal
Nothing -> necessity key (coercion <$> C.value)
where
name = "PGRST_" <> map capitalize (toS key)
capitalize '-' = '_'
capitalize c = toUpper c
reloadableDbSetting =
if key `notElem` [
"server-host", "server-port", "server-unix-socket", "server-unix-socket-mode", "log-level",
"db-anon-role", "db-uri", "db-channel-enabled", "db-channel", "db-pool", "db-pool-timeout", "db-load-guc-config"]
then lookup key dbSettings
else Nothing
coerceText :: C.Value -> Text
coerceText (C.String s) = s
coerceText v = show v