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Merge pull request #156503 from hercules-ci/nixos-add-system.build-options

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nixos: Add `system.build.`{`toplevel`,`installBootLoader`}, improve error message
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Robert Hensing 2022-01-25 14:13:24 +01:00 • committed by GitHub
commit 8919495cac
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7 changed files with 112 additions and 20 deletions
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lib/options.nix
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@ -172,11 +172,13 @@ rec {
else if all isInt list && all (x: x == head list) list then head list
else throw "Cannot merge definitions of `${showOption loc}'. Definition values:${showDefs defs}";
mergeOneOption = loc: defs:
if defs == [] then abort "This case should never happen."
else if length defs != 1 then
throw "The unique option `${showOption loc}' is defined multiple times. Definition values:${showDefs defs}"
else (head defs).value;
mergeOneOption = mergeUniqueOption { message = ""; };
mergeUniqueOption = { message }: loc: defs:
if length defs == 1
then (head defs).value
else assert length defs > 1;
throw "The option `${showOption loc}' is defined multiple times.\n${message}\nDefinition values:${showDefs defs}";
/* "Merge" option definitions by checking that they all have the same value. */
mergeEqualOption = loc: defs: