It'd be really useful when debugging problems with darcs' interaction with SSH
for darcs to dump the external commands it is executing. I have a temporary
putStrLn that I uncomment in order to do this, but it would be better to have a
flag, because then when a user reports some problem with darcs/SSH we can get
them to show us the commands that their darcs is actually running (and perhaps
the exit codes, too).
Should we add a flag --show-external that dumps the external commands? I
started to do this, but it means propagating [DarcsFlag] all over the place, and
the patch is going to be pretty big. Does anyone object to this? In GHC when
we have to propagate a flag everywhere we sometimes resort to a top-level
unsafePerformIO instead (since the flag is always constant for a given run of
darcs, this isn't so bad). Thoughts?
Cheers,
Simon
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