s/user/userData

"user" alone is too ambiguous for a variable name.

README.rst

@@ -108,7 +108,7 @@ This is a module that defines a *service derivation*:
 
 .. code-block:: nix
 
-    { charts, lib, user, ... }: {  # I
+    { charts, lib, userData, ... }: {  # I
       builder = lib.builders.helmChart; # I2; O1
       args = {  # < - - - - - - - - - - - O2
         chart = charts.jetstack.cert-manager; # I1
@@ -129,8 +129,8 @@ This is a module that defines a *service derivation*:
         {
           apiVersion = "cert-manager.io/v1";
           kind = "ClusterIssuer";
-          metadata.name = user.vars.k8sCert.name; # I3
-          spec.ca.secretName = user.vars.k8sCert.name;
+          metadata.name = userData.vars.k8sCert.name; # I3
+          spec.ca.secretName = userData.vars.k8sCert.name;
         }
       ];
     }
@@ -312,7 +312,7 @@ These functions are only available outside of service modules.
 mkDerivation
 ------------
 
-``{charts, user?}
+``{charts, userData?}
 -> {pname, version, src, serviceRoot, nsMetadata?, kubeVersion?, apiVersions?}
 -> <derivation: a dir of Kustomization dirs>``
 
@@ -321,7 +321,7 @@ The main interface to Turboprop.
 The first attrset instantiates the derivation builder:
 
 - **charts** (attrs): A tree of Helm chart derivations.
-- **user** (attrs, default: ``{}``): Additional data to be used by the service modules.
+- **userData** (attrs, default: ``{}``): Additional data to be used by the service modules.
 
 The second attrset specifies the derivation to build:
 
@@ -466,7 +466,7 @@ Other signatures
 Service (unbuilt)
 -----------------
 
-``{name, namespace, charts?, lib?, pkgs?, user?} -> {builder, args, extraObjects?}``
+``{name, namespace, charts?, lib?, pkgs?, userData?} -> {builder, args, extraObjects?}``
 
 A service module as defined in your flake.
 
@@ -475,7 +475,7 @@ Input attrset, of which any of its attributes may be omitted if unused:
 - **charts** (attrs): A tree of Helm chart derivations.
 - **lib** (attrs): Turboprop library.
 - **pkgs** (attrs): Nixpkgs.
-- **user** (attrs): Additional data for the service module.
+- **userData** (attrs): Additional data for the service module.
 
 Output attrset:
 

default.nix

@@ -3,7 +3,7 @@
   haumea,
   lib,
   pkgs,
-  user,
+  userData,
 } @ inputs: let
   mk = import src/mk.nix inputs;
 in {

flake.nix

@@ -45,10 +45,10 @@
       lib = lib // {
         mkDerivation = {
           charts,
-          user ? {},
+          userData ? {},
         }:
           (import self {
-            inherit charts haumea lib pkgs user;
+            inherit charts haumea lib pkgs userData;
           })
           .mkDerivation;
 

src/mk.nix

@@ -3,10 +3,10 @@
   haumea,
   lib,
   pkgs,
-  user,
+  userData,
 }: let
   # This is a Haumea loader that transforms unbuilt service modules:
-  # {charts, lib, pkgs, user, ...} -> {builder, args}
+  # {charts, lib, pkgs, userData, ...} -> {builder, args}
   # into almost-built modules:
   # {kubeVersion, apiVersions} -> {out, extra}
   #
@@ -16,7 +16,7 @@
     charts,
     lib,
     pkgs,
-    user,
+    userData,
     ...
   } @ inputs: p: let
     srcPath =
@@ -64,7 +64,7 @@ in {
   }: let
     modules = haumea.lib.load {
       src = serviceRoot;
-      inputs = {inherit charts lib pkgs user;};
+      inputs = {inherit charts lib pkgs userData;};
       loader = serviceLoader;
       transformer = lib.liftDefault;
     };