Some conda-forge Packages missing from repo.mamba.pm/conda-forge Channel

[michaelweinold]

Out of our many Brightway conda-forge packages (eg. bw2data, bw2io, bw2calc, etc.) only bw2parameters and bw2speedups are available at beta.mamba.pm/channels/conda-forge:

My understanding is that I can't install packages from the default conda-forge channel during the build process of the xeus-python + JupyterLite hub, instead having to rely on the https://repo.mamba.pm/conda-forge channel.

If this is correct, how can I add our remaining packages?

[martinRenou]

My understanding is that I can't install packages from the default conda-forge channel during the build process of the xeus-python + JupyterLite hub, instead having to rely on the https://repo.mamba.pm/conda-forge channel.

That is not correct, you can actually use the official conda-forge channel if you want in combination with the emscripten-forge one.

https://repo.mamba.pm/conda-forge is just a mirror that gets updated from time to time. Feel free to use the official conda-forge channel :)

[michaelweinold]

Ah, I see! I would just like to make sure the conda environment file is explicit about which packages have to be installed from emscripten-forge and which ones can be taken from conda-forge. I think we'll go with something along the lines of:

name: xeus-python-kernel
channels:
  - https://repo.mamba.pm/emscripten-forge # check packages at https://beta.mamba.pm/channels
  - conda-forge
  - nodefaults
dependencies:
  # DATA SCIENCE
  - pandas # from channel emscripten-forge
  - numpy # from channel emscripten-forge
  # PLOTTING
  - matplotlib # from channel emscripten-forge
  # BRIGHTWAY DEPENDENCIES (NOT PURE PYTHON)
  - peewee # from channel emscripten-forge (required by brightway)
  - lxml # from channel emscripten-forge (required by brightway)
  # BRIGHTWAY CORE
  - conda-forge::bw2io=0.8.8 # https://anaconda.org/conda-forge/bw2io/files
  - conda-forge::bw2data=3.6.6 # https://anaconda.org/conda-forge/bw2data/files
  - conda-forge::bw2calc=1.8.2 # https://anaconda.org/conda-forge/bw2calc/files

[martinRenou]

I'm not sure you need to be very specific about the channel.

The channel emscripten-forge being the first in the list, it will have priority over what's in conda-forge.

Only no-arch packages can be pulled from conda-forge, if you try to install other packages like NumPy from conda-forge it will complain saying that NumPy is not installable on the emscripten-32 platform.

[michaelweinold]

Is NumPy not available on emscripten-32? https://beta.mamba.pm/channels/emscripten-forge/packages/numpy

[DerThorsten]

it should be available ( all versions you see at https://beta.mamba.pm/channels/emscripten-forge/packages/numpy are for emscripten-32)

[martinRenou]

I highlighted the important part of my comment :)

What I meant is that you don't really need to be specific, your packages will be pulled from the right channel automatically.

[michaelweinold]

I see - many thanks, this is clear now!

[njzjz]

I got the same issue - the latest pip in https://repo.mamba.pm/conda-forge does not support Python 3.12.

The README is confusing.

recipes/README.md

Lines 15 to 22 in f0d72a4

	```bash
	micromamba create -n my-channel-name \
	--platform=emscripten-wasm32 \
	-c https://repo.mamba.pm/emscripten-forge \
	-c https://repo.mamba.pm/conda-forge \
	--yes \
	python numpy scipy matplotlib
	```