conda-forge migration

It might be in our interest to base our builds based on conda-forge. Here is what comes to my mind to enable the migration:

• Cache conda-forge recent (and needed) packages from linux-64 and osx-64 and osx-arm64 builds
• Vincent: update libblitz-feedstock to match ours
• Tiago: remove vlfeat dependency from bob.ip.base Fix and merge https://github.com/conda-forge/vlfeat-feedstock/pull/9
• Laurent: Submit zc.buildout to conda-forge
• Laurent: Submit zc.recipe.egg to conda-forge
• Amir: We need to use conda-forge docker image(s), their compilers, and mac requirements
• Remove deps from bob/bob.devtools>
• Start building bob/bob.devtools> based on conda-forge
• Update pin versions in bob.devtools
• Archive bob/conda>
• Amir: We need to delist packages in our channel that are already in conda-forge using metadata patches
• Delete all the beta packages
• Start building bob packages based on conda-forge
• Use https://github.com/conda-forge/miniforge/ instead of miniconda
• We might need to support yum-requirements.txt to support pyopengl which needs mesa-libGL-devel package installed. See: https://gitlab.idiap.ch/bob/bob.devtools/-/blob/5cd514f64181dd0ee834aaf61ebb189c0257e9f8/.gitlab-ci.yml#L71 https://gitlab.idiap.ch/bob/bob.ip.view uses pyopengl

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rest of packages that we have in bob/conda>:

already exist in conda-forge

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marked the checklist item Cache conda-forge recent (and needed) packages from linux-64 and osx-64 and osx-arm64 builds as completed

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mentioned in merge request conda!473 (closed)

mentioned in issue #79 (closed)

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In order to switch to conda-forge, I have to delist some dependency packages that exist both in our channel and conda-forge. But, that would break stable Bob installations until we release a conda-forge version. Any idea? I think maybe I should put the delisted packages in the archive channel as well by creating symlinks.

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mentioned in merge request !245 (merged)

mentioned in merge request !246 (merged)

marked the checklist item Vincent: update libblitz-feedstock to match ours as completed

marked the checklist item Tiago: remove vlfeat dependency from bob.ip.base Fix and merge https://github.com/conda-forge/vlfeat-feedstock/pull/9 as completed

marked the checklist item Laurent: Submit zc.buildout to conda-forge as completed

marked the checklist item Amir: We need to use conda-forge docker image(s), their compilers, and mac requirements as completed