macos rpm-python macos _rpm.so fails: symbol not found in flat namespace '_lua_strlen'

[jayvdb]

I am trying to modify https://github.com/Homebrew/homebrew-core/blob/master/Formula/rpm.rb to build the Python RPM bindings, and it builds correctly, but then import rpm results in

>>> import rpm
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.10/site-packages/rpm/__init__.py", line 38, in <module>
    from rpm._rpm import *
ImportError: dlopen(/usr/local/lib/python3.10/site-packages/rpm/_rpm.so, 0x0002): symbol not found in flat namespace '_lua_strlen'

% otool -L /usr/local/lib/python3.10/site-packages/rpm/_rpm.so | grep lua
	/usr/local/opt/lua/lib/liblua.dylib (compatibility version 5.4.0, current version 5.4.3)
% otool -L /usr/local/lib/python3.10/site-packages/rpm/_rpm.so
/usr/local/lib/python3.10/site-packages/rpm/_rpm.so:
	/usr/local/Cellar/rpm/4.17.0/lib/librpm.9.dylib (compatibility version 12.0.0, current version 12.0.0)
	/usr/local/Cellar/rpm/4.17.0/lib/librpmio.9.dylib (compatibility version 12.0.0, current version 12.0.0)
	/usr/local/Cellar/rpm/4.17.0/lib/librpmbuild.9.dylib (compatibility version 12.0.0, current version 12.0.0)
	/usr/lib/libiconv.2.dylib (compatibility version 7.0.0, current version 7.0.0)
	/usr/local/opt/libmagic/lib/libmagic.1.dylib (compatibility version 2.0.0, current version 2.0.0)
	/usr/local/Cellar/rpm/4.17.0/lib/librpmsign.9.dylib (compatibility version 12.0.0, current version 12.0.0)
	/usr/local/opt/sqlite/lib/libsqlite3.0.dylib (compatibility version 9.0.0, current version 9.6.0)
	/usr/lib/libbz2.1.0.dylib (compatibility version 1.0.0, current version 1.0.8)
	/usr/lib/libz.1.dylib (compatibility version 1.0.0, current version 1.2.11)
	/usr/local/opt/xz/lib/liblzma.5.dylib (compatibility version 8.0.0, current version 8.5.0)
	/usr/local/opt/libomp/lib/libomp.dylib (compatibility version 5.0.0, current version 5.0.0)
	/usr/local/opt/lua/lib/liblua.dylib (compatibility version 5.4.0, current version 5.4.3)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1311.0.0)
	/usr/local/opt/zstd/lib/libzstd.1.dylib (compatibility version 1.0.0, current version 1.5.1)
	/usr/local/opt/popt/lib/libpopt.0.dylib (compatibility version 1.0.0, current version 1.1.0)
	/usr/local/opt/gettext/lib/libintl.8.dylib (compatibility version 11.0.0, current version 11.0.0)
	/usr/local/opt/openssl@1.1/lib/libcrypto.1.1.dylib (compatibility version 1.1.0, current version 1.1.0)
% nm -g /usr/local/lib/python3.10/site-packages/rpm/_rpm.so | grep strlen
                 U _strlen
% otool -hV /usr/local/lib/python3.10/site-packages/rpm/_rpm.so
/usr/local/lib/python3.10/site-packages/rpm/_rpm.so:
Mach header
      magic  cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
MH_MAGIC_64   X86_64        ALL  0x00      BUNDLE    30       2400 DYLDLINK
% otool -hV /usr/local/opt/lua/lib/liblua.dylib
/usr/local/opt/lua/lib/liblua.dylib:
Mach header
      magic  cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
MH_MAGIC_64   X86_64        ALL  0x00       DYLIB    14       1136   NOUNDEFS DYLDLINK TWOLEVEL NO_REEXPORTED_DYLIBS

Initially I was building with just adding depends_on "python@3.10" and --enable-python, but then I tried also enabling plugins, but that doesnt seem to have any effect.

diff --git a/Formula/rpm.rb b/Formula/rpm.rb
index 2d906b2632e..610f1bd703b 100644
--- a/Formula/rpm.rb
+++ b/Formula/rpm.rb
@@ -28,6 +28,7 @@ class Rpm < Formula
   depends_on "openssl@1.1"
   depends_on "pkg-config"
   depends_on "popt"
+  depends_on "python@3.10"
   depends_on "sqlite"
   depends_on "xz"
   depends_on "zstd"
@@ -57,11 +58,13 @@ class Rpm < Formula
                           "--sysconfdir=#{etc}",
                           "--with-path-magic=#{HOMEBREW_PREFIX}/share/misc/magic",
                           "--enable-nls",
-                          "--disable-plugins",
+                          "--disable-inhibit-plugin",
+                          "--enable-plugins",
                           "--with-external-db",
+                          "--enable-python",
                           "--with-crypto=openssl",
                           "--without-apidocs",
-                          "--with-vendor=#{tap.user.downcase}",
+                          #"--with-vendor=#{tap.user.downcase}",
                           # Don't allow superenv shims to be saved into lib/rpm/macros
                           "__MAKE=/usr/bin/make",
                           "__GIT=/usr/bin/git",

I've also tried removing the patch https://raw.githubusercontent.com/Homebrew/formula-patches/03cf8088210822aa2c1ab544ed58ea04c897d9c4/libtool/configure-big_sur.diff, mentioned at https://github.com/Homebrew/homebrew-core/blob/master/Formula/rpm.rb#L37-L38 .

My guess is that lua is being linked with "two-level namepaces", and rpm isnt, hence the incompatibility. But I am still a babe in these woods and hopefully someone can point me in the right direction.