keycloak: add scim-keycloak-user-storage-spi plugin

pkgs/servers/keycloak/all-plugins.nix

···
 
 {
   scim-for-keycloak = callPackage ./scim-for-keycloak {};
+  scim-keycloak-user-storage-spi = callPackage ./scim-keycloak-user-storage-spi {};
   keycloak-discord = callPackage ./keycloak-discord {};
   keycloak-metrics-spi = callPackage ./keycloak-metrics-spi {};
 }

pkgs/servers/keycloak/scim-keycloak-user-storage-spi/default.nix

···
+{ lib
+, stdenv
+, fetchFromGitHub
+, maven
+, javaPackages
+}:
+
+javaPackages.mavenfod rec {
+  pname = "scim-keycloak-user-storage-spi";
+  version = "unstable-2023-01-03";
+
+  src = fetchFromGitHub {
+    owner = "justin-stephenson";
+    repo = "scim-keycloak-user-storage-spi";
+    rev = "1be97049edf096ca0d9a78d988623d5d3f310fb1";
+    hash = "sha256-aGHInyy+VgyfjrXeZ6T6jfI00xaCwrRTehnew+mWYnQ=";
+  };
+
+  mvnHash = "sha256-CK42d+Ta1/XNQWCLaje6sI+C90YvzUcteuasVkUPfCk=";
+
+  nativeBuildInputs = [
+    maven
+  ];
+
+  installPhase = ''
+    install -D "target/scim-user-spi-0.0.1-SNAPSHOT.jar" "$out/scim-user-spi-0.0.1-SNAPSHOT.jar"
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/justin-stephenson/scim-keycloak-user-storage-spi";
+    description = "A third party module that extends Keycloak, allow for user storage in an external scimv2 server";
+    sourceProvenance = with sourceTypes; [
+      fromSource
+    ];
+    license = licenses.mit;
+    maintainers = with maintainers; [ s1341 ];
+  };
+}