Merge pull request #66762 from adisbladis/python-minimal

python3Minimal: Add top-level for a minimal Python 3 build

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

@@ -21,6 +21,12 @@
 , sha256
 , passthruFun
 , bash
+, stripConfig ? false
+, stripIdlelib ? false
+, stripTests ? false
+, stripTkinter ? false
+, rebuildBytecode ? true
+, stripBytecode ? false
 }:
 
 assert x11Support -> tcl != null
@@ -134,6 +140,7 @@ in with passthru; stdenv.mkDerivation {
     "--without-ensurepip"
     "--with-system-expat"
     "--with-system-ffi"
+  ] ++ optionals (openssl != null) [
     "--with-openssl=${openssl.dev}"
   ] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     "ac_cv_buggy_getaddrinfo=no"
@@ -221,8 +228,20 @@ in with passthru; stdenv.mkDerivation {
     find $out/lib/python*/config-* -type f -print -exec nuke-refs -e $out '{}' +
     find $out/lib -name '_sysconfigdata*.py*' -print -exec nuke-refs -e $out '{}' +
 
+    '' + optionalString stripConfig ''
+    rm -R $out/bin/python*-config $out/lib/python*/config-*
+    '' + optionalString stripIdlelib ''
+    # Strip IDLE (and turtledemo, which uses it)
+    rm -R $out/bin/idle* $out/lib/python*/{idlelib,turtledemo}
+    '' + optionalString stripTkinter ''
+    rm -R $out/lib/python*/tkinter
+    '' + optionalString stripTests ''
+    # Strip tests
+    rm -R $out/lib/python*/test $out/lib/python*/**/test{,s}
+    '' + ''
     # Include a sitecustomize.py file
     cp ${../sitecustomize.py} $out/${sitePackages}/sitecustomize.py
+    '' + optionalString rebuildBytecode ''
 
     # Determinism: rebuild all bytecode
     # We exclude lib2to3 because that's Python 2 code which fails
@@ -232,6 +251,8 @@ in with passthru; stdenv.mkDerivation {
     find $out -name "*.py" | ${pythonForBuildInterpreter}     -m compileall -q -f -x "lib2to3" -i -
     find $out -name "*.py" | ${pythonForBuildInterpreter} -O  -m compileall -q -f -x "lib2to3" -i -
     find $out -name "*.py" | ${pythonForBuildInterpreter} -OO -m compileall -q -f -x "lib2to3" -i -
+    '' + optionalString stripBytecode ''
+    find $out -type d -name __pycache__ -print0 | xargs -0 -I {} rm -rf "{}"
   '';
 
   preFixup = stdenv.lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
@@ -241,9 +262,9 @@ in with passthru; stdenv.mkDerivation {
 
   # Enforce that we don't have references to the OpenSSL -dev package, which we
   # explicitly specify in our configure flags above.
-  disallowedReferences = [
+  disallowedReferences =
-    openssl.dev
+    stdenv.lib.optionals (openssl != null) [ openssl.dev ]
-  ] ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
+    ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
     # Ensure we don't have references to build-time packages.
     # These typically end up in shebangs.
     pythonForBuild buildPackages.bash

pkgs/development/interpreters/python/default.nix

@@ -111,6 +111,38 @@ in {
     inherit passthruFun;
   };
 
+  # Minimal versions of Python (built without optional dependencies)
+  python3Minimal = (callPackage ./cpython {
+    self = python3Minimal;
+    sourceVersion = {
+      major = "3";
+      minor = "7";
+      patch = "4";
+      suffix = "";
+    };
+    sha256 = "0gxiv5617zd7dnqm5k9r4q2188lk327nf9jznwq9j6b8p0s92ygv";
+    inherit (darwin) CF configd;
+    inherit passthruFun;
+
+    # strip down that python version as much as possible
+    openssl = null;
+    readline = null;
+    ncurses = null;
+    gdbm = null;
+    sqlite = null;
+    stripConfig = true;
+    stripIdlelib = true;
+    stripTests = true;
+    stripTkinter = true;
+    rebuildBytecode = false;
+    stripBytecode = true;
+  }).overrideAttrs(old: {
+    pname = "python3-minimal";
+    meta = old.meta // {
+      maintainers = [];
+    };
+  });
+
   pypy27 = callPackage ./pypy {
     self = pypy27;
     sourceVersion = {

pkgs/top-level/all-packages.nix

@@ -8766,7 +8766,7 @@ in
   python3Packages = python3.pkgs;
 
   pythonInterpreters = callPackage ./../development/interpreters/python {};
-  inherit (pythonInterpreters) python27 python35 python36 python37 python38 pypy27 pypy36;
+  inherit (pythonInterpreters) python27 python35 python36 python37 python38 python3Minimal pypy27 pypy36;
 
   # Python package sets.
   python27Packages = lib.hiPrioSet (recurseIntoAttrs python27.pkgs);