always filter src using filterSource

Previously it was not possible, but it is now with
NixOS/nix#5494

Author: Kranzes

crate2nix/Cargo.nix

@@ -470,11 +470,7 @@ rec {
             requiredFeatures = [ ];
           }
         ];
-        # We can't filter paths with references in Nix 2.4
-        # See https://github.com/NixOS/nix/issues/5410
-        src = if ((lib.versionOlder builtins.nixVersion "2.4pre20211007") || (lib.versionOlder "2.5" builtins.nixVersion ))
-          then lib.cleanSourceWith { filter = sourceFilter;  src = ./.; }
-          else ./.;
+        src = lib.cleanSourceWith { filter = sourceFilter;  src = ./.; };
         authors = [
           "Peter Kolloch <info@eigenvalue.net>"
         ];

crate2nix/templates/Cargo.nix.tera

@@ -128,11 +128,7 @@ rec {
         {%- elif crate.source.Nix.file.package %}
         src = pkgs.callPackage {{crate.source.Nix.file.package | safe}} {};
         {%- elif crate.source.LocalDirectory.path %}
-        # We can't filter paths with references in Nix 2.4
-        # See https://github.com/NixOS/nix/issues/5410
-        src = if ((lib.versionOlder builtins.nixVersion "2.4pre20211007") || (lib.versionOlder "2.5" builtins.nixVersion ))
-          then lib.cleanSourceWith { filter = sourceFilter;  src = {{crate.source.LocalDirectory.path | safe}}; }
-          else {{crate.source.LocalDirectory.path | safe}};
+        src = lib.cleanSourceWith { filter = sourceFilter;  src = {{crate.source.LocalDirectory.path | safe}}; };
         {%- elif crate.source.Git %}
         workspace_member = null;
         src = pkgs.fetchgit {

sample_projects/bin_with_git_submodule_dep/Cargo.nix

@@ -121,11 +121,7 @@ rec {
             requiredFeatures = [ ];
           }
         ];
-        # We can't filter paths with references in Nix 2.4
-        # See https://github.com/NixOS/nix/issues/5410
-        src = if ((lib.versionOlder builtins.nixVersion "2.4pre20211007") || (lib.versionOlder "2.5" builtins.nixVersion ))
-          then lib.cleanSourceWith { filter = sourceFilter;  src = ./.; }
-          else ./.;
+        src = lib.cleanSourceWith { filter = sourceFilter;  src = ./.; };
         authors = [
           "Phillip Cloud <cloud@standard.ai>"
         ];

sample_projects/codegen/Cargo.nix

@@ -223,11 +223,7 @@ rec {
             requiredFeatures = [ ];
           }
         ];
-        # We can't filter paths with references in Nix 2.4
-        # See https://github.com/NixOS/nix/issues/5410
-        src = if ((lib.versionOlder builtins.nixVersion "2.4pre20211007") || (lib.versionOlder "2.5" builtins.nixVersion ))
-          then lib.cleanSourceWith { filter = sourceFilter;  src = ./.; }
-          else ./.;
+        src = lib.cleanSourceWith { filter = sourceFilter;  src = ./.; };
         authors = [
           "Peter Kolloch <info@eigenvalue.net>"
         ];

sample_projects/sub_dir_crates/Cargo.nix

@@ -126,11 +126,7 @@ rec {
             requiredFeatures = [ ];
           }
         ];
-        # We can't filter paths with references in Nix 2.4
-        # See https://github.com/NixOS/nix/issues/5410
-        src = if ((lib.versionOlder builtins.nixVersion "2.4pre20211007") || (lib.versionOlder "2.5" builtins.nixVersion ))
-          then lib.cleanSourceWith { filter = sourceFilter;  src = ./.; }
-          else ./.;
+        src = lib.cleanSourceWith { filter = sourceFilter;  src = ./.; };
         authors = [
           "Peter Kolloch <info@eigenvalue.net>"
         ];