[Feature request] Report the contents of the produced artefacts to the logs

[jaimergp]

As @dhirschfeld mentioned in conda/conda-package-handling#5 (comment):

One trick that might help would be to have a separate CI job which unpacked the contents of the just-built package and called tree on it. With GitHub Actions you could even output the result as a job summary - something like:

cph x mypkg.conda
contents=$(tree ./mypkg)
echo "### Package Contents" >> $GITHUB_STEP_SUMMARY
echo '```' >> $GITHUB_STEP_SUMMARY
echo "${contents}"  >> $GITHUB_STEP_SUMMARY
echo '```' >> $GITHUB_STEP_SUMMARY

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The idea is to have the logs report the contents of the artefacts (and their sizes) to easily check what has been included in the conda package. Very useful for staged-recipes reviews (did a package named tests got included?) and in-feedstock debugging (where's my library?!).

[leofang]

This would be great. It avoids the hassle of storing build artifacts for human inspection, which involves several steps.