Fix extendModules anonymous module numbering
#177080
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evalModules / extendModules has enough information to perform the numbering by itself, making extendModules safe and simplifying submoduleWith. The `extensionOffset` was supposed to be an implementation detail of `evalModules`/`extendModules` all along. Zooming out a bit, the number of `+` operations should match the number of `extendModules` calls, which can be more than the number of `submoduleWith` calls, which is less related to the problem being solved by `extensionOffset`, as it can defer that responsibility to `extendModules`.
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This is insufficient. The keys still collide where they shouldn't, probably when more than one option value extends the modules in the same file. Adding |
roberth
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Jun 13, 2022
Tried to make it work in NixOS#177080 but that still didn't solve all cases in practice (wip NixOS#176557). Found a simpler solution: don't number anonymous modules at all. Keys are assigned at a later stage anyway. We don't have to reinvent that solution in submoduleWith.
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Description of changes
Found a bug while working on #176557. This is a follow-up on #168778. Wish I found the simplification right away.
Quoting the commit message:
evalModules / extendModules has enough information to perform the
numbering by itself, making extendModules safe and simplifying
submoduleWith.
The
extensionOffsetwas supposed to be an implementation detailof
evalModules/extendModulesall along.Zooming out a bit, the number of
+operations should match thenumber of
extendModulescalls, which can be more than the numberof
submoduleWithcalls, which is less related to the problem beingsolved by
extensionOffset, as it can defer that responsibilityto
extendModules.Things done
sandbox = trueset innix.conf? (See Nix manual)nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage./result/bin/)nixos/doc/manual/md-to-db.shto update generated release notes