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Splitting a line

 
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# 1  
Old 07-04-2007
Splitting a line
I have a series of .txt files, that contain lines of text separated by the following string ====================
In some of the .txt files, the string ends with the word Document, leaving the string ==================Document.

I would like to be able to split any such line and move the word "Document" to the next line, appending it to the beginning of the next line.
Any suggestions?
# 2  
Old 07-04-2007
Hi.

Here is one solution:
Code:
#!/bin/sh

# @(#) s1       Demonstrate sed line split.

set -o nounset
echo " sh version: $BASH_VERSION" >&2
sed --version | head -1

FILE=${1-data1}

echo
echo " Input file:"
nl $FILE

echo
echo " Output"
sed 's/^\(.*====\)\(Document.*\)$/\1\n\2/' $FILE

exit 0

producing:
Code:
% ./s1
 sh version: 2.05b.0(1)-release
GNU sed version 4.1.2

 Input file:
     1  Beginning.
     2  This is a test set of data.
     3  ==============
     4  this is ok.
     5  ==============
     6  this is ok, too.
     7  =============Document
     8  this we want changed.
     9  =============
    10  this is ok again.
    11  End

 Output
Beginning.
This is a test set of data.
==============
this is ok.
==============
this is ok, too.
=============
Document
this we want changed.
=============
this is ok again.
End

cheers, drl
# 3  
Old 07-04-2007
If you really want to prepend Document to the beginning of the following line, e.g
Code:
======Document
foo

will become
Code:
======
Documentfoo

the following will work:
Code:
#!/bin/bash

vi <<-EOF >/dev/null 2>&1
        :r splitme.txt
        :%s/^\(=*\)\(Document\)\n\(.*\)$/\1\r\2\3/g
        :%s/^\(=*\)\(Document\)$/\1\r\2/g
        :w! splitme.new
        :q
EOF

exit 0

Cheers
ZB
# 4  
Old 07-04-2007
Hi.

Thanks to ZB for pointing out the part I apparently skipped over. If that is desired, then the sed becomes slightly more complex (or mysterious), and it is easier to build it into a separate sed script file:

% cat s3
Code:
#!/bin/sh

# @(#) s3       Demonstrate sed line split and merge.

set -o nounset
echo " sh version: $BASH_VERSION" >&2
sed --version | head -1

FILE=${1-data1}

echo
echo " Input file:"
nl $FILE

cat >script <<'EOF'
/==Document$/{
N
s/==Document\n/==\nDocument/
}
EOF

echo
echo " Output"
sed -f script $FILE |
nl

exit 0

producing:
Code:
% ./s3
 sh version: 2.05b.0(1)-release
GNU sed version 4.1.2

 Input file:
     1  Beginning.
     2  This is a test set of data.
     3  ==============
     4  this is ok.
     5  ==============
     6  this is ok, too.
     7  =============Document
     8  this we want changed.
     9  =============
    10  this is ok again.
    11  End

 Output
     1  Beginning.
     2  This is a test set of data.
     3  ==============
     4  this is ok.
     5  ==============
     6  this is ok, too.
     7  =============
     8  Documentthis we want changed.
     9  =============
    10  this is ok again.
    11  End

With help from O'Reilly sed & awk, 2nd, Chapter 6 ... cheers, drl
# 5  
Old 07-05-2007
Thanks, I'm trying this, but I'm getting the error message

nl: data1: No such file or directory

Simon
# 6  
Old 07-05-2007
And I'm fooling around with the sed string outside of the script, and it's not actually working, period.
s/==Document\n/==\nDocument/
# 7  
Old 07-05-2007
Hi, Simon.
Quote:
Originally Posted by spindoctor
Thanks, I'm trying this, but I'm getting the error message

nl: data1: No such file or directory

Simon
You didn't post a data file so I made one up. It's listed in a few posts, but I'll post it below ... cheers, drl
Code:
Beginning.
This is a test set of data.
==============
this is ok.
==============
this is ok, too.
=============Document
this we want changed.
=============
this is ok again.
End

Last edited by drl; 07-05-2007 at 05:53 PM..
 
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