Remove ref to ome channel for zeroc-ice

[jburel]

review instructions to use conda-forge channel

[pwalczysko]

Could you please revise the sentence from the README

You may need to replace python3.8withpythonorpython3 depending on your Python distribution.

This does not seem either accurrate (3.8 has just been changed to 3.9) but maybe not even relevant ?

[pwalczysko]

1. the conda install works for both normal and developers.
2. the venv install does not work, the pip install omero-py fails with as below (cannot build ice wheel)

      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/Ice/WSEndpoint.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/Ice/WSEndpoint.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/Ice/WSTransceiver.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/Ice/WSTransceiver.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceDiscovery/IceDiscovery.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceDiscovery/IceDiscovery.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceDiscovery/LocatorI.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceDiscovery/LocatorI.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceDiscovery/LookupI.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceDiscovery/LookupI.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceDiscovery/PluginI.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceDiscovery/PluginI.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceLocatorDiscovery/IceLocatorDiscovery.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceLocatorDiscovery/IceLocatorDiscovery.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceLocatorDiscovery/PluginI.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceLocatorDiscovery/PluginI.o -w
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -fPIC -O2 -isystem /Users/pwalczysko/mambaforge/include -arch x86_64 -DICE_STATIC_LIBS -Isrc -Isrc/ice/cpp/include -Isrc/ice/cpp/src -I/Users/pwalczysko/Work/omero-py/testjmpy/include -I/Users/pwalczysko/mambaforge/include/python3.10 -c src/ice/cpp/src/IceSSL/AcceptorI.cpp -o build/temp.macosx-11.0-arm64-cpython-310/src/ice/cpp/src/IceSSL/AcceptorI.o -w
      In file included from src/ice/cpp/src/IceSSL/AcceptorI.cpp:14:
      In file included from src/ice/cpp/src/IceSSL/OpenSSLTransceiverI.h:14:
      In file included from src/ice/cpp/src/IceSSL/Util.h:23:
      In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Security.framework/Headers/Security.h:27:
      /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Security.framework/Headers/SecBase.h:88:33: error: typedef redefinition with different types ('struct __SecCertificate' vs 'OpaqueSecCertificateRef')
      typedef struct __SecCertificate OpaqueSecCertificateRef;
                                      ^
      src/ice/cpp/include/IceSSL/Plugin.h:67:8: note: previous definition is here
      struct OpaqueSecCertificateRef;
             ^
      In file included from src/ice/cpp/src/IceSSL/AcceptorI.cpp:14:
      In file included from src/ice/cpp/src/IceSSL/OpenSSLTransceiverI.h:14:
      In file included from src/ice/cpp/src/IceSSL/Util.h:23:
      In file included from /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Security.framework/Headers/Security.h:27:
      /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/Security.framework/Headers/SecBase.h:111:25: error: typedef redefinition with different types ('struct __SecKey' vs 'OpaqueSecKeyRef')
      typedef struct __SecKey OpaqueSecKeyRef;
                              ^
      src/ice/cpp/include/IceSSL/Plugin.h:73:8: note: previous definition is here
      struct OpaqueSecKeyRef;
             ^
      2 errors generated.
      error: command '/usr/bin/clang' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for zeroc-ice
Failed to build zeroc-ice
ERROR: Could not build wheels for zeroc-ice, which is required to install pyproject.toml-based projects

[pwalczysko]

venv install does not seem to work #407 (comment)

[jburel]

@pwalczysko That's why I put the comment about installing the Ice-Python binding and see tox.ini file as an example
this really depends on the OS and Python version. You are trying to build it from source which as we know does not work in many cases.

This is not suitable for the README since we have far too many cases to handle