Extract version number from file in shell script

Question

I\'m trying to write a bash script that increments the version number which is given in

{major}.{minor}.{revision}

For example.

<         


        

Answer 1

Inspired by the answer of jlliagre I made my own version which supports version numbers just having a major version given. jlliagre's version will make 1 -> 1.2 instead of 2.

This one is appropriate to both styles of version numbers:

function increment_version()
    local VERSION="$1"

    local INCREMENTED_VERSION=
    if [[ "$VERSION" =~ .*\..* ]]; then
        INCREMENTED_VERSION="${VERSION%.*}.$((${VERSION##*.}+1))"
    else
        INCREMENTED_VERSION="$((${VERSION##*.}+1))"
    fi

    echo "$INCREMENTED_VERSION"
}

This will produce the following outputs:

increment_version 1         -> 2 
increment_version 1.2       -> 1.3    
increment_version 1.2.9     -> 1.2.10 
increment_version 1.2.9.101 -> 1.2.9.102