py310-grpcio @1.48.4: ERROR Source build is not a directory

[ryandesign (Ryan Carsten Schmidt)]

​https://build.macports.org/builders/ports-10.14_x86_64-builder/builds/195277/steps/install-port/logs/stdio

Executing:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_grpc/py310-grpcio/work/grpc-1.48.4" && /opt/local/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m build --no-isolation build 
DEBUG: system:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_grpc/py310-grpcio/work/grpc-1.48.4" && /opt/local/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m build --no-isolation build 
ERROR Source build is not a directory
Command failed:  cd "/opt/local/var/macports/build/_opt_bblocal_var_buildworker_ports_build_ports_devel_grpc/py310-grpcio/work/grpc-1.48.4" && /opt/local/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m build --no-isolation build 
Exit code: 1

[dragos-bth (Dragos Ilie)]

Having the same issue:

:debug:build MACOSX_DEPLOYMENT_TARGET='14.0'
:debug:build MACPORTS_LEGACY_SUPPORT_DISABLED='1'
:debug:build OBJC='/usr/bin/clang'
:debug:build OBJCFLAGS='-arch arm64 -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk'
:debug:build SDKROOT='/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk'
:info:build Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_grpc/py310-grpcio/work/grpc-1.48.4" && /opt/local/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m build --no-isolation build 
:debug:build system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_grpc/py310-grpcio/work/grpc-1.48.4" && /opt/local/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m build --no-isolation build 
:info:build ERROR Source build is not a directory
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_devel_grpc/py310-grpcio/work/grpc-1.48.4" && /opt/local/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m build --no-isolation build 
:info:build Exit code: 1
:error:build Failed to build py310-grpcio: command execution failed
:debug:build Error code: CHILDSTATUS 94947 1

[FlyingSamson]

I can also confirm this. I had a look into the work/grpc-1.48.4 and indeed there is no build folder to be found in there. I then tried removing the ​build.target build line from the portfile. This seems to solve this problem, leaving me with a classic "How did that ever work" feeling. However, unfortunately a little further down the line all hell breaks loose with multiple errors such as

:info:build Error compiling Cython file:
:info:build ------------------------------------------------------------
:info:build ...
:info:build     return 1
:info:build   else:
:info:build     return 0
:info:build cdef grpc_arg_pointer_vtable default_vtable
:info:build default_vtable.copy = &_copy_pointer
:info:build                       ^
:info:build ------------------------------------------------------------
:info:build src/python/grpcio/grpc/_cython/_cygrpc/vtable.pyx.pxi:34:22: Cannot assign type 'void *(*)(void *) except? NULL' to 'void *(*)(vo
id *) noexcept'. Exception values are incompatible. Suggest adding 'noexcept' to the type of the value being assigned.

This is most likely due to a too new cython version being used during the build step (see also ​this SO thread). The cython version required by grpc also changed recently in version ​1.63 from pre 3.0.0 to at least 3.0.0. The "easiest" solution might be to update grpc to a more recent version.

[ryandesign (Ryan Carsten Schmidt)]

Replying to FlyingSamson:

leaving me with a classic "How did that ever work" feeling.

It got broken when the python portgroup's default value of python.pep517 changed from no to yes for python versions 3.7–3.10 last year. The fix for that would be simply:

devel/grpc/Portfile

@@ -234 +234 @@
                     GRPC_PYTHON_BUILD_WITH_CYTHON=1
     }
 
+    python.pep517   no
+
     # Build instructions:
     # https://github.com/grpc/grpc/tree/master/src/python/grpcio#installing-from-source
 

But I expect you're right that it also needs to be updated to build with cython 3. Subports for python 3.11 and 3.12 should be added then as well.

[ryandesign (Ryan Carsten Schmidt)]

In e0cc3ebca7eb5937f9b3a217309a32e7b654d297/macports-ports (master):

py*-grpcio*: Disable python.pep517

Fixes "ERROR Source build is not a directory"

See: #69262

[ryandesign (Ryan Carsten Schmidt)]

While that has fixed the "ERROR Source build is not a directory" error, there are then other errors; I'm not working on fixing them.

[jmroot (Joshua Root)]

This particular error is fixed, #70563 is open for the rest.