CODEWITHSUNDEEP
regexlinux
Maxim_united
Maxim_united

Reputation: 2003

bash: rename a file based on a regex

I have a file named /tmp/foo_primary.bar by default or any other filename a user specified.

How can I rename the file (variable) using bash so that if it contains the string primary it will change to secondary and if not, just append _secondary?

Thanks

Upvotes: 0

Views: 92

Answers (1)

choroba
choroba

Reputation: 242038

You don't need a regex, a pattern will do:

#!/bin/bash
filepath=$1
if [[ $filepath != */* ]] ; then # File in PWD.
    filepath=./$filepath
fi
filename=${filepath##*/}

if [[ $filename = *primary* ]] ; then
    newname=${filename/primary/secondary}
else
    newname=$filename'_secondary'
fi

mv "$filepath" "${filepath%/*}"/"$newname"

Check "Parameter expansion" in man bash for explanations of the ${...} constructs.

Upvotes: 1

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