expose python environment throug sub-attribute, for accessing python interpreter to run admin scripts

seafile-server/default.nix

@@ -49,6 +49,8 @@ let
     pycryptodome
   ]
   ++ map (p: p.override { inherit django; }) djangoModules; # build django modules with required version
+  # defining them here to be able to expose them in a python environment as well
+  pythonEnvDeps = seahubPythonDependencies ++ [ libsearpc ];
   seafile-server-core = stdenv.mkDerivation rec {
     name = "seafile-server-core";
     inherit version;
@@ -66,7 +68,7 @@ let
     # `which` is called directly from python during buildPhase, so we need the binary
     nativeBuildInputs = [ autoconf automake libtool pkgconfig vala autoreconfHook which pythonPackages.wrapPython ];
     buildInputs = [ sqlite glib python libuuid openssl oniguruma fuse libarchive libevent libevhtp ];
-    propagatedBuildInputs = [ libsearpc ] ++ seahubPythonDependencies;
+    propagatedBuildInputs = pythonEnvDeps;
     # copy manual to required location
     postInstall = ''
       mkdir $out/doc
@@ -127,6 +129,7 @@ stdenv.mkDerivation {
   name = "seafile-server";
   inherit version;
 
+  nativeBuildInputs = [ python3Packages.wrapPython  ];
   buildInputs = [ seahub seafile-server-core libsearpc ]
     ++ lib.optional withMysql libmysqlclient;
   phases = [ "installPhase" "fixupPhase" "distPhase" ];
@@ -145,10 +148,21 @@ stdenv.mkDerivation {
     cp -r ${seafile-server-core.src}/scripts/upgrade .
     cp -r ${seafile-server-core.src}/scripts/sql .
     # copy_user_manual is already done in the postInstall hook of seafile-server-core
+    # python admin scripts need to be made executable and patched with python path
+    chmod ugo+x *.py
+    buildPythonPath $propagatedBuildInputs
+    wrapPythonProgramsIn "$out/*.py" "$out $pythonPath"
+
+    echo -n "${version}" > installed_version
   '';
   meta = with lib; {
     maintainers = with maintainers; [ schmittlauch ];
     license = licenses.free; # components with different free software licenses are combined
   };
   inherit seafile-server-core seahub;# for using the path in the NixOS module
+  
+  pythonEnv = python3.buildEnv.override {
+    extraLibs = pythonEnvDeps;
+    ignoreCollisions = true;
+  };
 }