scripts: fallback to empty config table if args were not passed from the config files

Fixes #158

src/scripts/access/access-default.lua

@@ -5,7 +5,7 @@
 --
 -- SPDX-License-Identifier: MIT
 
-local config = ...
+local config = ... or {}
 
 -- preprocess rules and create Interest objects
 for _, r in ipairs(config.rules or {}) do

src/scripts/create-item.lua

@@ -6,7 +6,7 @@
 -- SPDX-License-Identifier: MIT
 
 -- Receive script arguments from config.lua
-local config = ...
+local config = ... or {}
 
 items = {}
 

src/scripts/default-routes.lua

@@ -8,7 +8,7 @@
 --
 -- SPDX-License-Identifier: MIT
 
-local config = ...
+local config = ... or {}
 
 -- whether to store state on the file system
 use_persistent_storage = config["use-persistent-storage"] or false

src/scripts/monitors/alsa-midi.lua

@@ -6,7 +6,7 @@
 -- SPDX-License-Identifier: MIT
 
 -- Receive script arguments from config.lua
-local config = ...
+local config = ... or {}
 
 -- ensure config.properties is not nil
 config.properties = config.properties or {}

src/scripts/monitors/alsa.lua

@@ -6,7 +6,7 @@
 -- SPDX-License-Identifier: MIT
 
 -- Receive script arguments from config.lua
-local config = ...
+local config = ... or {}
 
 -- ensure config.properties is not nil
 config.properties = config.properties or {}

src/scripts/policy-endpoint-client-links.lua

@@ -5,7 +5,7 @@
 --
 -- SPDX-License-Identifier: MIT
 
-local config = ...
+local config = ... or {}
 config.roles = config.roles or {}
 config["duck.level"] = config["duck.level"] or 0.3
 

src/scripts/policy-endpoint-client.lua

@@ -6,7 +6,7 @@
 -- SPDX-License-Identifier: MIT
 
 -- Receive script arguments from config.lua
-local config = ...
+local config = ... or {}
 config.roles = config.roles or {}
 
 local self = {}

src/scripts/policy-endpoint-device.lua

@@ -6,7 +6,7 @@
 -- SPDX-License-Identifier: MIT
 
 -- Receive script arguments from config.lua
-local config = ...
+local config = ... or {}
 
 -- ensure config.move and config.follow are not nil
 config.move = config.move or false

src/scripts/policy-node.lua

@@ -6,7 +6,7 @@
 -- SPDX-License-Identifier: MIT
 
 -- Receive script arguments from config.lua
-local config = ...
+local config = ... or {}
 
 -- ensure config.move and config.follow are not nil
 config.move = config.move or false