Correctly call all the parent contructors of the stores

Using virtual inheritance means that only the default constructors of
the parent classes will be called, which isn't what we want

src/libstore/build.cc

@@ -2883,7 +2883,7 @@ struct RestrictedStore : public LocalFSStore
     DerivationGoal & goal;
 
     RestrictedStore(const Params & params, ref<LocalStore> next, DerivationGoal & goal)
-        : Store(params), LocalFSStore(params), next(next), goal(goal)
+        : StoreConfig(params), LocalFSStoreConfig(params), Store(params), LocalFSStore(params), next(next), goal(goal)
     { }
 
     Path getRealStoreDir() override

src/libstore/dummy-store.cc

@@ -2,17 +2,22 @@
 
 namespace nix {
 
-struct DummyStoreConfig : StoreConfig {};
+struct DummyStoreConfig : StoreConfig {
+    using StoreConfig::StoreConfig;
+};
 
-struct DummyStore : public Store
+struct DummyStore : public Store, public virtual DummyStoreConfig
 {
     DummyStore(const std::string uri, const Params & params)
         : DummyStore(params)
     { }
 
     DummyStore(const Params & params)
-        : Store(params)
-    { }
+        : StoreConfig(params)
+        , DummyStoreConfig(params)
+        , Store(params)
+    {
+    }
 
     string getUri() override
     {

src/libstore/http-binary-cache-store.cc

@@ -31,7 +31,9 @@ public:
     HttpBinaryCacheStore(
         const Path & _cacheUri,
         const Params & params)
-        : BinaryCacheStore(params)
+        : StoreConfig(params)
+        , BinaryCacheStoreConfig(params)
+        , BinaryCacheStore(params)
         , HttpBinaryCacheStoreConfig(params)
         , cacheUri(_cacheUri)
     {

src/libstore/legacy-ssh-store.cc

@@ -44,7 +44,8 @@ struct LegacySSHStore : public Store, public virtual LegacySSHStoreConfig
     static std::vector<std::string> uriPrefixes() { return {"ssh"}; }
 
     LegacySSHStore(const string & host, const Params & params)
-        : LegacySSHStoreConfig(params)
+        : StoreConfig(params)
+        , LegacySSHStoreConfig(params)
         , Store(params)
         , host(host)
         , connections(make_ref<Pool<Connection>>(

src/libstore/local-binary-cache-store.cc

@@ -20,7 +20,9 @@ public:
     LocalBinaryCacheStore(
         const Path & binaryCacheDir,
         const Params & params)
-        : LocalBinaryCacheStoreConfig(params)
+        : StoreConfig(params)
+        , BinaryCacheStoreConfig(params)
+        , LocalBinaryCacheStoreConfig(params)
         , BinaryCacheStore(params)
         , binaryCacheDir(binaryCacheDir)
     {

src/libstore/local-store.cc

@@ -42,7 +42,10 @@ namespace nix {
 
 
 LocalStore::LocalStore(const Params & params)
-    : Store(params)
+    : StoreConfig(params)
+    , Store(params)
+    , LocalFSStoreConfig(params)
+    , LocalStoreConfig(params)
     , LocalFSStore(params)
     , realStoreDir_{this, false, rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
         "physical path to the Nix store"}

src/libstore/local-store.hh

@@ -30,8 +30,17 @@ struct OptimiseStats
     uint64_t blocksFreed = 0;
 };
 
+struct LocalStoreConfig : virtual LocalFSStoreConfig
+{
+    using LocalFSStoreConfig::LocalFSStoreConfig;
 
-class LocalStore : public LocalFSStore
+    Setting<bool> requireSigs{(StoreConfig*) this,
+        settings.requireSigs,
+        "require-sigs", "whether store paths should have a trusted signature on import"};
+};
+
+
+class LocalStore : public LocalFSStore, public virtual LocalStoreConfig
 {
 private:
 
@@ -95,10 +104,6 @@ public:
 
 private:
 
-    Setting<bool> requireSigs{(StoreConfig*) this,
-        settings.requireSigs,
-        "require-sigs", "whether store paths should have a trusted signature on import"};
-
     const PublicKeys & getPublicKeys();
 
 public:

src/libstore/remote-store.cc

@@ -124,7 +124,10 @@ ref<RemoteStore::Connection> RemoteStore::openConnectionWrapper()
 
 
 UDSRemoteStore::UDSRemoteStore(const Params & params)
-    : Store(params)
+    : StoreConfig(params)
+    , Store(params)
+    , LocalFSStoreConfig(params)
+    , RemoteStoreConfig(params)
     , UDSRemoteStoreConfig(params)
     , LocalFSStore(params)
     , RemoteStore(params)

src/libstore/remote-store.hh

@@ -148,7 +148,8 @@ private:
 struct UDSRemoteStoreConfig : virtual LocalFSStoreConfig, virtual RemoteStoreConfig
 {
     UDSRemoteStoreConfig(const Store::Params & params)
-        : LocalFSStoreConfig(params)
+        : StoreConfig(params)
+        , LocalFSStoreConfig(params)
         , RemoteStoreConfig(params)
     {
     }

src/libstore/s3-binary-cache-store.cc

@@ -199,7 +199,9 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore, virtual S3BinaryCache
     S3BinaryCacheStoreImpl(
         const std::string & bucketName,
         const Params & params)
-        : S3BinaryCacheStoreConfig(params)
+        : StoreConfig(params)
+        , BinaryCacheStoreConfig(params)
+        , S3BinaryCacheStoreConfig(params)
         , S3BinaryCacheStore(params)
         , bucketName(bucketName)
         , s3Helper(profile, region, scheme, endpoint)

src/libstore/ssh-store.cc

@@ -11,20 +11,23 @@ namespace nix {
 struct SSHStoreConfig : virtual RemoteStoreConfig
 {
     using RemoteStoreConfig::RemoteStoreConfig;
+
     const Setting<Path> sshKey{(StoreConfig*) this, "", "ssh-key", "path to an SSH private key"};
     const Setting<bool> compress{(StoreConfig*) this, false, "compress", "whether to compress the connection"};
     const Setting<Path> remoteProgram{(StoreConfig*) this, "nix-daemon", "remote-program", "path to the nix-daemon executable on the remote system"};
     const Setting<std::string> remoteStore{(StoreConfig*) this, "", "remote-store", "URI of the store on the remote system"};
 };
 
-class SSHStore : public RemoteStore, public virtual SSHStoreConfig
+class SSHStore : public virtual RemoteStore, public virtual SSHStoreConfig
 {
 public:
 
     SSHStore(const std::string & host, const Params & params)
-        : Store(params)
+        : StoreConfig(params)
+        , Store(params)
         , RemoteStoreConfig(params)
         , RemoteStore(params)
+        , SSHStoreConfig(params)
         , host(host)
         , master(
             host,

src/libstore/store-api.hh

@@ -653,7 +653,7 @@ struct LocalFSStoreConfig : virtual StoreConfig
         "log", "directory where Nix will store state"};
 };
 
-class LocalFSStore : public virtual Store, public LocalFSStoreConfig
+class LocalFSStore : public virtual Store, public virtual LocalFSStoreConfig
 {
 public: