[Solved] Extract data from txt file and create new file based on specific text dynamically

by


Here is an easy-to-read solution with Bash and grep:

#!/bin/bash

while read line ; do
if FILE=$(grep -P -o '[a-z]*\.txt(?= - Starting)' <<< "$line"); then
F="$FILE"
fi
if ! grep '\*\*\*\*' <<< "$line" ; then
echo "$line" >> "$F"
fi
done

It gives the following result

$ cat file.txt
****************** abc.txt - Starting point  ********************
abc
asd
asad
asfkn
sadjn
****************** abc.txt - End point  ********************
****************** def.txt - Starting point  ********************
fjhdsf
sdjnbs
askd
akdsn
dhskn
****************** def.txt - End point  ********************
****************** xyz.txt - Starting point  ********************
akdsnaskd
sakdnbasd
akjsndb
askjdb
akdsnb
****************** xyz.txt - End point  ********************
$ cat file.txt | ./go.sh
****************** abc.txt - Starting point  ********************
****************** abc.txt - End point  ********************
****************** def.txt - Starting point  ********************
****************** def.txt - End point  ********************
****************** xyz.txt - Starting point  ********************
****************** xyz.txt - End point  ********************
$ cat abc.txt
abc
asd
asad
asfkn
sadjn
$ cat def.txt
fjhdsf
sdjnbs
askd
akdsn
dhskn
$ cat xyz.txt
akdsnaskd
sakdnbasd
akjsndb
askjdb
akdsnb

solved Extract data from txt file and create new file based on specific text dynamically