python2: move cpython, mkPythonDerivation into resholve

pkgs/development/interpreters/python/cpython/docs/default.nix

@@ -8,36 +8,24 @@ let
   pythonDocs = {
     html = {
       recurseForDerivations = true;
-      python27 = import ./2.7-html.nix {
-        inherit stdenv fetchurl lib;
-      };
       python310 = import ./3.10-html.nix {
         inherit stdenv fetchurl lib;
       };
     };
     pdf_a4 = {
       recurseForDerivations = true;
-      python27 = import ./2.7-pdf-a4.nix {
-        inherit stdenv fetchurl lib;
-      };
       python310 = import ./3.10-pdf-a4.nix {
         inherit stdenv fetchurl lib;
       };
     };
     pdf_letter = {
       recurseForDerivations = true;
-      python27 = import ./2.7-pdf-letter.nix {
-        inherit stdenv fetchurl lib;
-      };
       python310 = import ./3.10-pdf-letter.nix {
         inherit stdenv fetchurl lib;
       };
     };
     text = {
       recurseForDerivations = true;
-      python27 = import ./2.7-text.nix {
-        inherit stdenv fetchurl lib;
-      };
       python310 = import ./3.10-text.nix {
         inherit stdenv fetchurl lib;
       };

pkgs/development/interpreters/python/default.nix

@@ -30,18 +30,6 @@
   in
   {
 
-    python27 = callPackage ./cpython/2.7 {
-      self = __splicedPackages.python27;
-      sourceVersion = {
-        major = "2";
-        minor = "7";
-        patch = "18";
-        suffix = ".12"; # ActiveState's Python 2 extended support
-      };
-      hash = "sha256-RuEgfpags9wJm9Xe0daotqUx4knABEUc7DvtgnQXEfE=";
-      inherit passthruFun;
-    };
-
     python311 = callPackage ./cpython {
       self = __splicedPackages.python311;
       sourceVersion = {

pkgs/development/interpreters/python/python-packages-base.nix

@@ -102,7 +102,11 @@ let
     );
 
   mkPythonDerivation =
-    if python.isPy3k then ./mk-python-derivation.nix else ./python2/mk-python-derivation.nix;
+    if python.isPy3k then
+      ./mk-python-derivation.nix
+    else
+      # Python 2 build infrastructure lives with its only consumers (resholve, pypy27).
+      ../../misc/resholve/python2/mk-python-derivation.nix;
 
   buildPythonPackage = makeOverridablePythonPackage (
     overrideStdenvCompat (

pkgs/development/misc/resholve/cpython-2.7/default.nix

@@ -146,7 +146,7 @@ let
     # It does break aarch64-darwin, which we do support. See:
     # * https://bugs.python.org/issue35523
     # * https://github.com/python/cpython/commit/e6b247c8e524
-    ../3.7/no-win64-workaround.patch
+    ./no-win64-workaround.patch
 
     # fix openssl detection by reverting irrelevant change for us, to enable hashlib which is required by pip
     (fetchpatch {
@@ -378,7 +378,7 @@ stdenv.mkDerivation (
 
     postFixup = ''
       # Include a sitecustomize.py file. Note it causes an error when it's in postInstall with 2.7.
-      cp ${../../sitecustomize.py} $out/${sitePackages}/sitecustomize.py
+      cp ${../../../interpreters/python/sitecustomize.py} $out/${sitePackages}/sitecustomize.py
     ''
     + lib.optionalString strip2to3 ''
       rm -R $out/bin/2to3 $out/lib/python*/lib2to3

pkgs/development/misc/resholve/python27.nix

@@ -11,9 +11,33 @@ let
         knownVulnerabilities = [ ];
       };
     });
+
+  passthruFun = import ../../interpreters/python/passthrufun.nix {
+    inherit lib;
+    inherit (pkgsBuildHost)
+      stdenv
+      callPackage
+      pythonPackagesExtensions
+      config
+      makeScopeWithSplicing'
+      ;
+  };
+
+  python27Base = pkgsBuildHost.callPackage ./cpython-2.7 {
+    self = python27;
+    sourceVersion = {
+      major = "2";
+      minor = "7";
+      patch = "18";
+      suffix = ".12"; # ActiveState's Python 2 extended support
+    };
+    hash = "sha256-RuEgfpags9wJm9Xe0daotqUx4knABEUc7DvtgnQXEfE=";
+    inherit passthruFun;
+  };
+
   # We are removing `meta.knownVulnerabilities` from `python27`,
   # and setting it in `resholve` itself.
-  python27 = (removeKnownVulnerabilities pkgsBuildHost.pythonInterpreters.python27).override {
+  python27 = (removeKnownVulnerabilities python27Base).override {
     self = python27;
     pkgsBuildHost = pkgsBuildHost // {
       inherit python27;