CODEWITHSUNDEEP
bashshellsh
Nick Thenick
Nick Thenick

Reputation: 85

How to use REGEX inside of an if statement

I need to create a code where i take all the files in the current directory ending with *.txt, *.jpg, *.conf. After i collect those i need to check if they contain a certain line which is:
<?xml version="1.0" encoding="UTF-8"?>
if they do contain the following line, then i need to rename them to *.xml.


My question is: How do i check with regex in an if statement if the file contains the given regex code?

My current code:

ls *.txt *.data *.conf
for f in *.*
case $f in
*.txt)
if [[ "$(grep -q '<\?xml version="[0-9]*.[0-9]*" encoding=".*"\?>' *.txt) ]]; then
mv -- "$f" "${%f.txt].xml"
fi
;;

esac
done
ls

the code for *.jpg) and *.conf) would be the same. Any help is appreciated.

Upvotes: 3

Views: 52

Answers (1)

anubhava
anubhava

Reputation: 784898

You may use:

for f in *.txt *.data *.conf; do
   if grep -iq '<?xml version="[0-9]*\.[0-9]*" encoding="[^"]*"?>' "$f"; then
      mv "$f" "${f%.*}.xml" 
   fi
done

-q option in grep is for the quiet mode.

Upvotes: 5

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