In some environments, e.g. shebanged scripts, it's undesirable to add --debug and --debug-output as commandline options, so we should also read environment variables like $FISH_DEBUG and $FISH_DEBUG_OUTPUT.
(yes, uppercase because these have to be exported from the outside)
In some environments, e.g. shebanged scripts, it's undesirable to add
--debugand--debug-outputas commandline options, so we should also read environment variables like $FISH_DEBUG and $FISH_DEBUG_OUTPUT.(yes, uppercase because these have to be exported from the outside)