Caching seems not to be working on macOS

[hoechenberger]

I cannot provide sufficient information now – this issue is supposed to serve as a reminder.

I'm under the impression that caching is not working on my macOS machine – it seems that all steps are always run again, regardless of the caching setting. I also tried the "hash" method, but I'm not seeing any change. Needs to be investigated.

[larsoner]

This makes me think that we should take our smallest dataset and set up a GitHub actions version of the tests that just run on that dataset.

[larsoner]

So a rough check (ignore my cruft):

$ du -s ~/mne_data/ds00* | sort -rnk1
3883408	/home/larsoner/mne_data/ds001810
3474416	/home/larsoner/mne_data/ds000246
2407716	/home/larsoner/mne_data/ds003104
2286128	/home/larsoner/mne_data/ds000248
1864280	/home/larsoner/mne_data/ds004229
1766884	/home/larsoner/mne_data/ds000117
1690760	/home/larsoner/mne_data/ds000247
992692	/home/larsoner/mne_data/ds004107
891284	/home/larsoner/mne_data/ds000248_ica
851544	/home/larsoner/mne_data/ds003392
181484	/home/larsoner/mne_data/ds001971
30796	/home/larsoner/mne_data/ds003775

Looks like we could use 1971, 3775, or 3392. 3392 is our smallest MEG dataset and 1971 runs decoding so I'm inclined toward testing those.

[hoechenberger]

@larsoner Turns out that my issues may have been caused by storing the output files in a OneDrive-synced folder. Maybe some batter's magic caused the caching to sometimes fail, or who knows what. At any rate, all seems to be fine now – I'm saving the pipeline output in a folder that's not synced to OneDrive.