BUG: `ignored_deps_per_node` in migrators does not work correctly

[h-vetinari]

ignored_deps_per_node does not work as intended; for example conda-forge/conda-forge-pinning-feedstock#8218 added

    ignored_deps_per_node:
      pyarrow:
        # optional test dependencies
        - numba
        - sparse

to the 3.14t migration, and yet, two weeks later, pyarrow is still considered a child of numba.

.
Same thing happened for conda-forge/conda-forge-pinning-feedstock#8272

CC @beckermr

[beckermr]

oh fun!

[beckermr]

Ah so this keyword adjust the build logic here:

cf-scripts/conda_forge_tick/migrators/core.py

Line 920 in 70cb54b

if node in self.ignored_deps_per_node.get(

It does not however adjust the status page. So it might be that it is working fine. Did you check that the PR being blocked is actually due to this?

[h-vetinari]

Ah so this keyword adjusts the build logic here: [...] It does not however adjust the status page.

How does this work in practice? I cannot come up with a consistent mental model for how things should work if the status page does not actually represent the state of the subgraph for the migrator. IOW, if we assume the core migration mechanics keep advancing, are all those PRs (and their children) now permanently blocked from the POV of the status page, despite having been migrated already? That would just make the status page completely useless.

Did you check that the PR being blocked is actually due to this?

I double-checked again; I migrated conda-forge/pyarrow-feedstock#169 manually, and ignored its irrelevant test dependencies in conda-forge/conda-forge-pinning-feedstock#8218; this should have unblocked the bot. If it had actually moved on, it should have either opened a PR for pyarrow or moved on to pyarrow's children; neither has happened (I checked https://github.com/conda-forge/tokenizers-feedstock, which has no other parents; it did not receive a 3.14t PR so far).

[beckermr]

We'll have to check the bot metadata on the backend. I don't know the answers to your questions or what is happening here.