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lib/modules: Use options apply function even if no values are defined

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This allows `apply` functions to return a valid value if they completely
ignore their argument, which is the case for the option renaming
functions like `mkAliasOptionModule`. Therefore this solves issue #63693
This commit is contained in:
Silvan Mosberger 2019-08-10 00:04:07 +02:00
parent 3cde54ceb9
commit de9cb24938
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GPG Key ID: 9424360B4B85C9E7
1 changed files with 8 additions and 10 deletions
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18
lib/modules.nix
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@ -323,16 +323,14 @@ rec {
else
mergeDefinitions loc opt.type defs';
# Check whether the option is defined, and apply the ‘apply’
# function to the merged value. This allows options to yield a
# value computed from the definitions.
value =
if !res.isDefined then
throw "The option `${showOption loc}' is used but not defined."
else if opt ? apply then
opt.apply res.mergedValue
else
res.mergedValue;
# The value with a check that it is defined
valueDefined = if res.isDefined then res.mergedValue else
throw "The option `${showOption loc}' is used but not defined.";
# Apply the 'apply' function to the merged value. This allows options to
# yield a value computed from the definitions
value = if opt ? apply then opt.apply valueDefined else valueDefined;
in opt //
{ value = builtins.addErrorContext "while evaluating the option `${showOption loc}':" value;