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Push getFSAccessor unsupported(...) down Store class hierarchy

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More progress on issue #5729.

Instead of having it by the default method in `Store` itself, have it be
the implementation in `DummyStore` and `LegacySSHStore`. Then just the
implementations which fail to provide the method pay the "penalty" of
dealing with the icky `unimplemented` function for non-compliance.

Combined with my other recent PRs, this finally makes `Store` have no
`unsupported` calls!
This commit is contained in:
John Ericson 2023-04-13 13:38:12 -04:00
parent ef0b48377d
commit ee97f107e8
3 changed files with 7 additions and 2 deletions
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3
src/libstore/store-api.hh
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@ -678,8 +678,7 @@ public:
/**
* @return An object to access files in the Nix store.
*/
virtual ref<FSAccessor> getFSAccessor()
{ unsupported("getFSAccessor"); }
virtual ref<FSAccessor> getFSAccessor() = 0;
/**
* Repair the contents of the given path by redownloading it using