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Factor out a GcStore interface

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Starts progress on #5729.

The idea is that we should not have these default methods throwing
"unimplemented". This is a small step in that direction.

I kept `addTempRoot` because it is a no-op, rather than failure. Also,
as a practical matter, it is called all over the place, while doing
other tasks, so the downcasting would be annoying.

Maybe in the future I could move the "real" `addTempRoot` to `GcStore`,
and the existing usecases use a `tryAddTempRoot` wrapper to downcast or
do nothing, but I wasn't sure whether that was a good idea so with a
bias to less churn I didn't do it yet.
This commit is contained in:
John Ericson 2022-03-01 18:31:36 +00:00
parent 391f4fcabe
commit 6636202356
16 changed files with 143 additions and 93 deletions
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3
src/libstore/remote-store.hh
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@ -4,6 +4,7 @@
#include <string>
#include "store-api.hh"
#include "gc-store.hh"
namespace nix {
@ -29,7 +30,7 @@ struct RemoteStoreConfig : virtual StoreConfig
/* FIXME: RemoteStore is a misnomer - should be something like
DaemonStore. */
class RemoteStore : public virtual RemoteStoreConfig, public virtual Store
class RemoteStore : public virtual RemoteStoreConfig, public virtual Store, public virtual GcStore
{
public: