Very Computer

So far, i'm able to delete all the lines after CHANGE HISTORY by using

sed -e '/-- CHANGE HISTORY:/q' myfile.ada

but this leaves the
-- ----------------------------------------                          
-- CHANGE HISTORY:  

remaining.  Any help will be appreciated, and i'd like to use SED if
possible (rather than awk, ksh scripts, etc.)

Thanks...

-- ----------------------------------------
-- CHANGE HISTORY:
-- All remaining text after the "-- CHANGE HISTORY" string should be
deleted
-- as well....
etc...
etc...
....
....
<<End of File>>

sed -ne '/^-- CHANGE HISTORY:$/q' -e 'x;1d;p'

--
Stphane

starting from where u left off: (substitute u'r string -- CHANGE HISTORY:
whenever u see regex)

  sed -e '/regex/q' inputfile | sed -e 'N;$!P;$!D;$d'
  ^^^^^^^^^^^^^^^^^^^^^^               ^^^^^^^^^^^^^^
   get lines upto CHANGE HIST..        delete last 2 lines

or u can do it all with 1 call to sed:

sed -e '
:loop
$!N
/\nregex$/!bloop
s///
s/^\(.*\)\n.*$/\1/
q
' inputfile

or:
sed -ne '/regex/!{H;b;};x;s/^\n//;s/^\(.*\)\n.*$/\1/p;q' inputfile

Note: this solution assumes a particular format of your file, viz.,
 a) line containing regex CANNOT be the last line of the file.
 b) file length MUST be 3 lines or more.
 c) file MUST contain the regex.

Quote:> Ok, so in my code example below, i would like to first search for the
> line containing the "-- CHANGE HISTORY" string.  Then, I would like
> delete the ONE line before it (i.e. the "-- ------etc..." line).
> Then, i would like to delete EVERY line to the end of the file after
> the CHANGE HISTORY string line.  Finally, i would like to delete line
> containing the CHANGE HISTORY string.

> So far, i'm able to delete all the lines after CHANGE HISTORY by using

> sed -e '/-- CHANGE HISTORY:/q' myfile.ada

> but this leaves the
> -- ----------------------------------------                          
> -- CHANGE HISTORY:  

> remaining.  Any help will be appreciated, and i'd like to use SED if
> possible (rather than awk, ksh scripts, etc.)

> Thanks...

> -- ----------------------------------------
> -- CHANGE HISTORY:
> -- All remaining text after the "-- CHANGE HISTORY" string should be
> deleted
> -- as well....
> etc...
> etc...
> ....
> ....
> <<End of File>>

sed -ne '/^-- CHANGE HISTORY:$/q;x;1d;p'

?
--

Quote:>>sed -ne '/^-- CHANGE HISTORY:$/q' -e 'x;1d;p'

> why not

> sed -ne '/^-- CHANGE HISTORY:$/q;x;1d;p'

sed -e '/^-- CHANGE HISTORY:$/{d;q;}' -e 'x;1d'
(here the second -e is necessary)

Then realized it was simpler with -n and forgot to join the two
expressions.

--
Stphane

John
--
use Perl;
program
fulfillment