Fix channels_remap and add regression test for percent-encoded packages

[jaimergp]

Description

Closes #908

Checklist - did you ...

• Add a file to the news directory (using the template) for the next release's release notes?
• Add / update necessary tests?
• Add / update outdated documentation?

[jaimergp]

Trying to debug the use_channel_remap failures, I see they are not tied to the new conda-libmamba-solver release.

• I can reproduce locally with both conda-libmamba-solver 24.9 and 24.11
• The problem shows up for both conda-standalone 24.5 and 24.9
• It does NOT show up for micromamba
• The PathNotFound errors come from this command run as part of the installer (so the installer does get built):

+ CONDA_ROOT_PREFIX=/private/var/folders/1b/z374sygs1s96t_xxxv0hr3lr0000gn/T/pytest-of-jrodriguez/pytest-632/test_example_use_channel_remap0/install-use_channel_remap-0.0.1-MacOSX-arm64-sh
+ CONDA_REGISTER_ENVS=true
+ CONDA_SAFETY_CHECKS=disabled
+ CONDA_EXTRA_SAFETY_CHECKS=no
+ CONDA_CHANNELS=
+ CONDA_PKGS_DIRS=/private/var/folders/1b/z374sygs1s96t_xxxv0hr3lr0000gn/T/pytest-of-jrodriguez/pytest-632/test_example_use_channel_remap0/install-use_channel_remap-0.0.1-MacOSX-arm64-sh/pkgs
+ CONDA_QUIET=1
+ /private/var/folders/1b/z374sygs1s96t_xxxv0hr3lr0000gn/T/pytest-of-jrodriguez/pytest-632/test_example_use_channel_remap0/install-use_channel_remap-0.0.1-MacOSX-arm64-sh/_conda install --offline --file /private/var/folders/1b/z374sygs1s96t_xxxv0hr3lr0000gn/T/pytest-of-jrodriguez/pytest-632/test_example_use_channel_remap0/install-use_channel_remap-0.0.1-MacOSX-arm64-sh/pkgs/env.txt -yp /private/var/folders/1b/z374sygs1s96t_xxxv0hr3lr0000gn/T/pytest-of-jrodriguez/pytest-632/test_example_use_channel_remap0/install-use_channel_remap-0.0.1-MacOSX-arm64-sh --no-rc

• That empty CONDA_CHANNELS is weird. Might come from the Jinja PR. Let me look into it because maybe it should not be empty? 🤔
• Changing these lines to their https counterparts, results in a different error. The installation does get through but the assertions in the test do not pass AssertionError: assert 'pkgs/main' == 'private_repo'.

[jaimergp]

• That empty CONDA_CHANNELS is weird. Might come from the Jinja PR. Let me look into it because maybe it should not be empty? 🤔

Nah, constructor 3.10 also does that:

CONDA_ROOT_PREFIX="$PREFIX" \
CONDA_REGISTER_ENVS="true" \
CONDA_SAFETY_CHECKS=disabled \
CONDA_EXTRA_SAFETY_CHECKS=no \
CONDA_CHANNELS="" \
CONDA_PKGS_DIRS="$PREFIX/pkgs" \
CONDA_QUIET="$BATCH" \
"$CONDA_EXEC" install --offline --file "$PREFIX/pkgs/env.txt" -yp "$PREFIX" $shortcuts --no-rc || exit 1
rm -f "$PREFIX/pkgs/env.txt"

And it also reproduces the error, btw.

[jaimergp]

Hm, in CI downgrading to CLS 24.9 does fix it! 🤔

[marcoesters]

Should we update dependencies to not use libmamba 24.11.0?

[jaimergp]

Good idea. Probably worth a repodata patch too, althought it might be easier to mark as broken?

[marcoesters]

Good idea. Probably worth a repodata patch too, althought it might be easier to mark as broken?

Patching is easier than marking it as broken because workflows may point to pinned versions of constructor. Marking it as broken can break these workflows.

[marcoesters]

Do we need to update pyproject.toml, too, for restricting libmamba?

LGTM if not

[jaimergp]

Ugh, true.

[jaimergp]

Ah, wait, there's no run_constrained equivalent. Too bad 😬.