Properly filter the stores according to their declared uriSchemes

When opening a store, only try the stores whose `uriSchemes()` include
the current one

src/libstore/dummy-store.cc

@@ -8,7 +8,7 @@ struct DummyStoreConfig : StoreConfig {
 
 struct DummyStore : public Store, public virtual DummyStoreConfig
 {
-    DummyStore(const std::string uri, const Params & params)
+    DummyStore(const std::string scheme, const std::string uri, const Params & params)
         : DummyStore(params)
     { }
 
@@ -21,7 +21,7 @@ struct DummyStore : public Store, public virtual DummyStoreConfig
 
     string getUri() override
     {
-        return uriPrefixes()[0] + "://";
+        return *uriSchemes().begin();
     }
 
     void queryPathInfoUncached(const StorePath & path,
@@ -30,7 +30,7 @@ struct DummyStore : public Store, public virtual DummyStoreConfig
         callback(nullptr);
     }
 
-    static std::vector<std::string> uriPrefixes() {
+    static std::set<std::string> uriSchemes() {
         return {"dummy"};
     }
 

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

@@ -29,13 +29,14 @@ private:
 public:
 
     HttpBinaryCacheStore(
+        const std::string & scheme,
         const Path & _cacheUri,
         const Params & params)
         : StoreConfig(params)
         , BinaryCacheStoreConfig(params)
         , BinaryCacheStore(params)
         , HttpBinaryCacheStoreConfig(params)
-        , cacheUri(_cacheUri)
+        , cacheUri(scheme + "://" + _cacheUri)
     {
         if (cacheUri.back() == '/')
             cacheUri.pop_back();
@@ -64,11 +65,11 @@ public:
         }
     }
 
-    static std::vector<std::string> uriPrefixes()
+    static std::set<std::string> uriSchemes()
     {
         static bool forceHttp = getEnv("_NIX_FORCE_HTTP") == "1";
-        auto ret = std::vector<std::string>({"http", "https"});
-        if (forceHttp) ret.push_back("file");
+        auto ret = std::set<std::string>({"http", "https"});
+        if (forceHttp) ret.insert("file");
         return ret;
     }
 protected:

src/libstore/legacy-ssh-store.cc

@@ -41,9 +41,9 @@ struct LegacySSHStore : public Store, public virtual LegacySSHStoreConfig
 
     SSHMaster master;
 
-    static std::vector<std::string> uriPrefixes() { return {"ssh"}; }
+    static std::set<std::string> uriSchemes() { return {"ssh"}; }
 
-    LegacySSHStore(const string & host, const Params & params)
+    LegacySSHStore(const string & scheme, const string & host, const Params & params)
         : StoreConfig(params)
         , LegacySSHStoreConfig(params)
         , Store(params)
@@ -92,7 +92,7 @@ struct LegacySSHStore : public Store, public virtual LegacySSHStoreConfig
 
     string getUri() override
     {
-        return uriPrefixes()[0] + "://" + host;
+        return *uriSchemes().begin() + "://" + host;
     }
 
     void queryPathInfoUncached(const StorePath & path,

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

@@ -18,6 +18,7 @@ private:
 public:
 
     LocalBinaryCacheStore(
+        [[maybe_unused]] const std::string scheme,
         const Path & binaryCacheDir,
         const Params & params)
         : StoreConfig(params)
@@ -35,7 +36,7 @@ public:
         return "file://" + binaryCacheDir;
     }
 
-    static std::vector<std::string> uriPrefixes();
+    static std::set<std::string> uriSchemes();
 
 protected:
 
@@ -96,7 +97,7 @@ bool LocalBinaryCacheStore::fileExists(const std::string & path)
     return pathExists(binaryCacheDir + "/" + path);
 }
 
-std::vector<std::string> LocalBinaryCacheStore::uriPrefixes()
+std::set<std::string> LocalBinaryCacheStore::uriSchemes()
 {
     if (getEnv("_NIX_FORCE_HTTP_BINARY_CACHE_STORE") == "1")
         return {};

src/libstore/remote-store.cc

@@ -135,7 +135,10 @@ UDSRemoteStore::UDSRemoteStore(const Params & params)
 }
 
 
-UDSRemoteStore::UDSRemoteStore(std::string socket_path, const Params & params)
+UDSRemoteStore::UDSRemoteStore(
+        [[maybe_unused]] const std::string scheme,
+        std::string socket_path,
+        const Params & params)
     : UDSRemoteStore(params)
 {
     path.emplace(socket_path);

src/libstore/remote-store.hh

@@ -165,11 +165,11 @@ class UDSRemoteStore : public LocalFSStore, public RemoteStore, public virtual U
 public:
 
     UDSRemoteStore(const Params & params);
-    UDSRemoteStore(std::string path, const Params & params);
+    UDSRemoteStore(const std::string scheme, std::string path, const Params & params);
 
     std::string getUri() override;
 
-    static std::vector<std::string> uriPrefixes()
+    static std::set<std::string> uriSchemes()
     { return {"unix"}; }
 
     bool sameMachine() override

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

@@ -197,6 +197,7 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore, virtual S3BinaryCache
     S3Helper s3Helper;
 
     S3BinaryCacheStoreImpl(
+        [[maybe_unused]] const std::string & scheme,
         const std::string & bucketName,
         const Params & params)
         : StoreConfig(params)
@@ -434,7 +435,7 @@ struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore, virtual S3BinaryCache
         return paths;
     }
 
-    static std::vector<std::string> uriPrefixes() { return {"s3"}; }
+    static std::set<std::string> uriSchemes() { return {"s3"}; }
 
 };
 

src/libstore/ssh-store.cc

@@ -22,7 +22,7 @@ class SSHStore : public virtual RemoteStore, public virtual SSHStoreConfig
 {
 public:
 
-    SSHStore(const std::string & host, const Params & params)
+    SSHStore([[maybe_unused]] const std::string & scheme, const std::string & host, const Params & params)
         : StoreConfig(params)
         , Store(params)
         , RemoteStoreConfig(params)
@@ -38,11 +38,11 @@ public:
     {
     }
 
-    static std::vector<std::string> uriPrefixes() { return {"ssh-ng"}; }
+    static std::set<std::string> uriSchemes() { return {"ssh-ng"}; }
 
     std::string getUri() override
     {
-        return uriPrefixes()[0] + "://" + host;
+        return *uriSchemes().begin() + "://" + host;
     }
 
     bool sameMachine() override

src/libstore/store-api.cc

@@ -1078,25 +1078,35 @@ std::shared_ptr<Store> openFromNonUri(const std::string & uri, const Store::Para
 ref<Store> openStore(const std::string & uri_,
     const Store::Params & extraParams)
 {
-    auto [uri, uriParams] = splitUriAndParams(uri_);
     auto params = extraParams;
-    params.insert(uriParams.begin(), uriParams.end());
+    try {
+        auto parsedUri = parseURL(uri_);
+        params.insert(parsedUri.query.begin(), parsedUri.query.end());
 
-    if (auto store = openFromNonUri(uri, params)) {
-        store->warnUnknownSettings();
-        return ref<Store>(store);
-    }
+        auto baseURI = parsedUri.authority.value_or("") + parsedUri.path;
 
         for (auto implem : *Implementations::registered) {
-        auto store = implem.create(uri, params);
+            if (implem.uriSchemes.count(parsedUri.scheme)) {
+                auto store = implem.create(parsedUri.scheme, baseURI, params);
                 if (store) {
                     store->init();
                     store->warnUnknownSettings();
                     return ref<Store>(store);
                 }
             }
+        }
+    }
+    catch (BadURL) {
+        auto [uri, uriParams] = splitUriAndParams(uri_);
+        params.insert(uriParams.begin(), uriParams.end());
 
-    throw Error("don't know how to open Nix store '%s'", uri);
+        if (auto store = openFromNonUri(uri, params)) {
+            store->warnUnknownSettings();
+            return ref<Store>(store);
+        }
+    }
+
+    throw Error("don't know how to open Nix store '%s'", uri_);
 }
 
 std::list<ref<Store>> getDefaultSubstituters()

src/libstore/store-api.hh

@@ -760,7 +760,8 @@ std::list<ref<Store>> getDefaultSubstituters();
 
 struct StoreFactory
 {
-    std::function<std::shared_ptr<Store> (const std::string & uri, const Store::Params & params)> create;
+    std::set<std::string> uriSchemes;
+    std::function<std::shared_ptr<Store> (const std::string & scheme, const std::string & uri, const Store::Params & params)> create;
     std::function<std::shared_ptr<StoreConfig> ()> getConfig;
 };
 struct Implementations
@@ -773,13 +774,14 @@ struct Implementations
         if (!registered) registered = new std::vector<StoreFactory>();
         StoreFactory factory{
             .create =
-                ([](const std::string & uri, const Store::Params & params)
+                ([](const std::string & scheme, const std::string & uri, const Store::Params & params)
                  -> std::shared_ptr<Store>
-                 { return std::make_shared<T>(uri, params); }),
+                 { return std::make_shared<T>(scheme, uri, params); }),
             .getConfig =
                 ([]()
                  -> std::shared_ptr<StoreConfig>
-                 { return std::make_shared<TConfig>(); })
+                 { return std::make_shared<TConfig>(StringMap({})); }),
+            .uriSchemes = T::uriSchemes()
         };
         registered->push_back(factory);
     }