Dogfood flakeModules.partitions

ci.nix

@@ -1,12 +0,0 @@
-# We're doing things a bit differently because Nix doesn't let us
-# split out the dev dependencies and subflakes are broken, let alone "superflakes".
-# See dev/README.md
-let
-  flake = import ./dev;
-  inherit (flake.inputs.nixpkgs) lib;
-in
-{
-  inherit (flake) herculesCI;
-} // {
-  checks = lib.recurseIntoAttrs flake.checks.${builtins.currentSystem};
-}

dev/README.md

@@ -1,6 +0,0 @@
-
-# Separate `dev` flake
-
-Wouldn't recommend this pattern normally, but I'm trying to keep
-deps low for `flake-parts` until we have split dev inputs
-that don't carry over to dependent lock files.

dev/default.nix

@@ -1,16 +0,0 @@
-let
-  flake = builtins.getFlake (toString ./.);
-  fmc-lib = (builtins.getFlake (toString ../.)).lib;
-  args = {
-    inherit self;
-  } // flake.inputs;
-  self = {
-    inherit (flake) inputs;
-    outPath = ../.; # used by pre-commit module, etc
-    outputs = self.config.flake;
-  } //
-  fmc-lib.mkFlake
-    { inputs = args; }
-    ./flake-module.nix;
-in
-self.config.flake // { inherit (flake) inputs; }

dev/flake.nix

@@ -3,7 +3,7 @@
 
   inputs = {
     # Flakes don't give us a good way to depend on .., so we don't.
-    # As a consequence, this flake is a little non-standard, and
+    # As a consequence, this flake only provides dependencies, and
     # we can't use the `nix` CLI as expected.
 
     nixpkgs.url = "github:NixOS/nixpkgs";
@@ -16,5 +16,6 @@
     {
       # The dev tooling is in ./flake-module.nix
       # See comment at `inputs` above.
+      # It is loaded into partitions.dev by the root flake.
     };
 }

dev/repl.nix

@@ -1,3 +0,0 @@
-# convenience for loading into nix repl
-let self = builtins.getFlake (toString ./.);
-in self // { inherit self; }

flake.nix

@@ -53,6 +53,15 @@
     in
     lib.mkFlake { inherit inputs; } {
       systems = [ ];
+      imports = [ flakeModules.partitions ];
+      partitionedAttrs.checks = "dev";
+      partitionedAttrs.devShells = "dev";
+      partitionedAttrs.herculesCI = "dev";
+      partitions.dev.extraInputsFlake = ./dev;
+      partitions.dev.extraInputs.flake-parts = inputs.self;
+      partitions.dev.module = {
+        imports = [ ./dev/flake-module.nix ];
+      };
       flake = {
         inherit lib templates flakeModules;
       };

shell.nix

@@ -1,2 +1 @@
-# non-idiomatic, see tools/README.md
-(import ./dev).devShells.${builtins.currentSystem}.default
+(builtins.getFlake ("git+file://" + toString ./.)).devShells.${builtins.currentSystem}.default