Move flake-related flags into a separate class

Also, rename --dont-save-lock-file to --no-save-lock-file and change
noRegistries to useRegistries.

src/libexpr/primops/flake.hh

@@ -64,7 +64,7 @@ typedef std::vector<std::shared_ptr<FlakeRegistry>> Registries;
 
 Path getUserRegistryPath();
 
-enum HandleLockFile
+enum HandleLockFile : unsigned int
     { AllPure // Everything is handled 100% purely
     , TopRefUsesRegistries // The top FlakeRef uses the registries, apart from that, everything happens 100% purely
     , UpdateLockFile // Update the existing lockfile and write it to file

src/nix/command.hh

@@ -11,8 +11,8 @@ extern std::string programPath;
 struct Value;
 class Bindings;
 class EvalState;
-
 class Store;
+enum HandleLockFile : unsigned int;
 
 /* A command that require a Nix store. */
 struct StoreCommand : virtual Command
@@ -61,17 +61,24 @@ private:
     std::shared_ptr<EvalState> evalState;
 };
 
-struct SourceExprCommand : virtual Args, EvalCommand
+struct MixFlakeOptions : virtual Args
 {
-    std::optional<Path> file;
-
-    SourceExprCommand();
-
     bool recreateLockFile = false;
 
     bool saveLockFile = true;
 
-    bool noRegistries = false;
+    bool useRegistries = true;
+
+    MixFlakeOptions();
+
+    HandleLockFile getLockFileMode();
+};
+
+struct SourceExprCommand : virtual Args, EvalCommand, MixFlakeOptions
+{
+    std::optional<Path> file;
+
+    SourceExprCommand();
 
     std::vector<std::shared_ptr<Installable>> parseInstallables(
         ref<Store> store, std::vector<std::string> ss);

src/nix/flake.cc

@@ -10,7 +10,7 @@
 
 using namespace nix;
 
-class FlakeCommand : virtual Args, public EvalCommand
+class FlakeCommand : virtual Args, public EvalCommand, public MixFlakeOptions
 {
     std::string flakeUri = ".";
 
@@ -32,7 +32,12 @@ public:
     Flake getFlake()
     {
         auto evalState = getEvalState();
-        return nix::getFlake(*evalState, getFlakeRef(), true);
+        return nix::getFlake(*evalState, getFlakeRef(), useRegistries);
+    }
+
+    ResolvedFlake resolveFlake()
+    {
+        return nix::resolveFlake(*getEvalState(), getFlakeRef(), getLockFileMode());
     }
 };
 
@@ -119,6 +124,7 @@ void printNonFlakeInfo(NonFlake & nonFlake, bool json) {
     }
 }
 
+// FIXME: merge info CmdFlakeInfo?
 struct CmdFlakeDeps : FlakeCommand, MixJSON
 {
     std::string name() override
@@ -136,7 +142,7 @@ struct CmdFlakeDeps : FlakeCommand, MixJSON
         auto evalState = getEvalState();
         evalState->addRegistryOverrides(registryOverrides);
 
-        ResolvedFlake resFlake = resolveFlake(*evalState, getFlakeRef(), UpdateLockFile);
+        auto resFlake = resolveFlake();
 
         std::queue<ResolvedFlake> todo;
         todo.push(resFlake);
@@ -334,7 +340,7 @@ struct CmdFlakeInit : virtual Args, Command
 
 struct CmdFlakeClone : FlakeCommand
 {
-    Path endDirectory = "";
+    Path destDir;
 
     std::string name() override
     {
@@ -348,7 +354,7 @@ struct CmdFlakeClone : FlakeCommand
 
     CmdFlakeClone()
     {
-        expectArg("end-dir", &endDirectory, true);
+        expectArg("dest-dir", &destDir, true);
     }
 
     void run(nix::ref<nix::Store> store) override
@@ -356,7 +362,7 @@ struct CmdFlakeClone : FlakeCommand
         auto evalState = getEvalState();
 
         Registries registries = evalState->getFlakeRegistries();
-        gitCloneFlake(getFlakeRef().to_string(), *evalState, registries, endDirectory);
+        gitCloneFlake(getFlakeRef().to_string(), *evalState, registries, destDir);
     }
 };
 

src/nix/installables.cc

@@ -13,6 +13,34 @@
 
 namespace nix {
 
+MixFlakeOptions::MixFlakeOptions()
+{
+    mkFlag()
+        .longName("recreate-lock-file")
+        .description("recreate lock file from scratch")
+        .set(&recreateLockFile, true);
+
+    mkFlag()
+        .longName("no-save-lock-file")
+        .description("do not save the newly generated lock file")
+        .set(&saveLockFile, false);
+
+    mkFlag()
+        .longName("no-registries")
+        .description("don't use flake registries")
+        .set(&useRegistries, false);
+}
+
+HandleLockFile MixFlakeOptions::getLockFileMode()
+{
+    return
+        useRegistries
+        ? recreateLockFile
+          ? (saveLockFile ? RecreateLockFile : UseNewLockFile)
+          : (saveLockFile ? UpdateLockFile : UseUpdatedLockFile)
+        : AllPure;
+}
+
 SourceExprCommand::SourceExprCommand()
 {
     mkFlag()
@@ -21,21 +49,6 @@ SourceExprCommand::SourceExprCommand()
         .label("file")
         .description("evaluate a set of attributes from FILE (deprecated)")
         .dest(&file);
-
-    mkFlag()
-        .longName("recreate-lock-file")
-        .description("recreate lock file from scratch")
-        .set(&recreateLockFile, true);
-
-    mkFlag()
-        .longName("dont-save-lock-file")
-        .description("save the newly generated lock file")
-        .set(&saveLockFile, false);
-
-    mkFlag()
-        .longName("no-registries")
-        .description("don't use flake registries")
-        .set(&noRegistries, true);
 }
 
 ref<EvalState> EvalCommand::getEvalState()
@@ -169,11 +182,7 @@ struct InstallableFlake : InstallableValue
     {
         auto vFlake = state.allocValue();
 
-        HandleLockFile handle = cmd.noRegistries ? AllPure :
-            cmd.recreateLockFile ?
-            (cmd.saveLockFile ? RecreateLockFile : UseNewLockFile)
-            : (cmd.saveLockFile ? UpdateLockFile : UseUpdatedLockFile);
-        makeFlakeValue(state, flakeRef, handle, *vFlake);
+        makeFlakeValue(state, flakeRef, cmd.getLockFileMode(), *vFlake);
 
         auto vProvides = (*vFlake->attrs->get(state.symbols.create("provides")))->value;