This is very neat. Going one step further, to allow debug
blocks:
perl -pi.bak -e 's/^(.*)$/#$1/ if /\bDEBUG\b/../\bENDDEBUG\b/' foo.pl
to remove the block, and
perl -pi.bak -e 's/^#(.*)$/$1/ if /\bDEBUG\b/../\bENDDEBUG\b/' foo.pl
To reenable it. Then you can do something like this:
... code
# DEBUG
debug code
# ENDDEBUG
... more code
And yes, there is something very weird about using Perl to
pre-process Perl...
--ZZamboni
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