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Old 08-30-2009, 10:21 PM   #1
b-bri
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Registered: Aug 2009
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Adding (not replacing) a pattern match with a similar pattern?


I'm writing a bash script to search html files, and when I find any occurrence of an img src tag like this:

<img src="123-picture-normal.jpg" alt="some random user entered text" border="0">

I want to add a second line below it that looks like:
<img src="123-picture-thumbnail.jpg" alt="some random user entered text" border="0">

All I need to do is duplicate the line but replace "normal" with "thumbnail"

Each file can have multiple img src tags with different numbered jpgs.

I have a feeling this is a job for sed, but I'm struggling with it. Any ideas?
 
Old 08-30-2009, 11:46 PM   #2
Kenhelm
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Registered: Mar 2008
Location: N. W. England
Distribution: Mandriva
Posts: 329

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Try
Code:
sed '/<img src="[0-9]*-picture-normal.jpg" alt="/{
h
s/-picture-normal.jpg" alt=/-picture-thumbnail.jpg" alt=/
x
G
}'
 
Old 08-31-2009, 12:36 AM   #3
b-bri
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Registered: Aug 2009
Posts: 2

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Excellent - I knew it was possible. Thanks for showing me how.
 
  


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