copyed simplesamlphp to package simplesamlphp theme

packages/simplesamlphptheme/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, php
+, writeText
+, fetchFromGitHub
+, extra_files ? { }
+
+}:
+
+php.buildComposerProject rec {
+  pname = "simplesamlphp";
+  version = "2.4.3";
+
+  src = fetchFromGitHub {
+    owner = "simplesamlphp";
+    repo = "simplesamlphp";
+    tag = "v${version}";
+    hash = "sha256-vv4gzcnPfMapd8gER2Vsng1SBloHKWrJJltnw2HUnX4=";
+  };
+
+  composerStrictValidation = false;
+
+  vendorHash = "sha256-vu3Iz6fRk3Gnh9Psn46jgRYKkmqGte+5xHBRmvdgKG4=";
+
+  # TODO: metadata could be fetched automagically with these:
+  #   - https://simplesamlphp.org/docs/contrib_modules/metarefresh/simplesamlphp-automated_metadata.html
+  #   - https://idp.pvv.ntnu.no/simplesaml/saml2/idp/metadata.php
+  postPatch = lib.pipe extra_files [
+    (lib.mapAttrsToList (target_path: source_path: ''
+      mkdir -p $(dirname "${target_path}")
+      cp -r "${source_path}" "${target_path}"
+    ''))
+    lib.concatLines
+  ];
+
+  postInstall = ''
+    ln -sr $out/share/php/simplesamlphp/vendor/simplesamlphp/simplesamlphp-assets-base $out/share/php/simplesamlphp/public/assets/base
+  '';
+}