cvd: Begin simplifying creation analyzer#2606
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Databean
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May 26, 2026
It only uses the number of instance names provided, so keep only that and store the selectors in CreationAnalyzer where they are actually used.
That environment variable is set by cvd_internal_start so each run_cvd process knows what instance they are. cvd_internal_start never read it, so `cvd create` shouldn't either.
Databean
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May 27, 2026
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Most of the simplification is done in StartSelectorParser.
The most significant change is that it no longer considers the
$CUTTLEFISH_INSTANCEenvironment variable when trying to figure the number of instances and its ids.cvd_internal_startnever expected the user to set that variable, expecting the user to use flags instead. That variable is unconditionally set bycvd_internal_startsorun_cvdand its children know which instance they are running.NOTE TO REVIEWER: reviewing each commit separately is going to be a lot easier than the entire PR at once.