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Advanced AWK Regexp substring to int & Replace

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# 1  
Old 08-17-2011
Advanced AWK Regexp substring to int & Replace


I have a difficult problem, to step up a unknown version number in a text file, and save the file. It would be great to run and the version gets increased.
Example the content of the textfile.txt
version = x

This include three steps
1. First find the char after "version =" e.g 5
2. Convert? the 5 to a integer and increase the value with 1, in this case result is 6
3. Replace the 5 with a 6
4. save the file

I understand this is a VERY difficult problem, if you can in any way it would be great, i tried with SED earlyer, but got stuck.

Thanks in advance
# 2  
Old 08-17-2011
if the version file is consistent how about:

VERSION=`cat textfile.txt | grep version | awk '{print $3}'`

# 3  
Old 08-17-2011
Actually, it is a very trivial problem. Here is one way of doing it.

while read a b c
   [[ "$a $b" == "version =" ]] && (( c++ ))
   echo "$a $b $c"
done < infile

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