sed: collapse logical lines

collapse-log-line.sed

#! /bin/sed -f
# SED script to concatenate logical lines sepaated by
# backslashes (\) at the end of the "physical" line

# set branch target 't'
:t
# apply the following on all lines ending with an '\'
/\\$/ {
  # concatenate actual line with the next in pattern space
  N;
  # replace '\<newline' with nothing
  s/\\\n//;
  # branch to label 't' and go on...
  bt;
}

#EOF