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nixos/home-assistant: account for "The Great Migration"

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See https://developers.home-assistant.io/blog/2019/02/19/the-great-migration.html
and https://github.com/NixOS/nixpkgs/issues/55958#issuecomment-466793526.
This commit is contained in:
Robert Schütz 2019-02-27 14:32:37 +01:00
parent 27fb4f46d2
commit 971187eada
1 changed files with 13 additions and 3 deletions
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16
nixos/modules/services/misc/home-assistant.nix
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@ -29,14 +29,24 @@ let
# platform = "luftdaten";
# ...
# } ];
#
# Beginning with 0.87 Home Assistant is migrating their components to the
# scheme "platform.subComponent", e.g. "hue.light" instead of "light.hue".
# See https://developers.home-assistant.io/blog/2019/02/19/the-great-migration.html.
# Hence, we also check whether we find an entry in the config when interpreting
# the first part of the path as the component.
useComponentPlatform = component:
let
path = splitString "." component;
# old: platform is the last part of path
parentConfig = attrByPath (init path) null cfg.config;
platform = last path;
in isList parentConfig && any
(item: item.platform or null == platform)
parentConfig;
# new: platform is the first part of the path
parentConfig' = attrByPath (tail path) null cfg.config;
platform' = head path;
in
(isList parentConfig && any (item: item.platform or null == platform) parentConfig)
|| (isList parentConfig' && any (item: item.platform or null == platform') parentConfig');
# Returns whether component is used in config
useComponent = component: