Automatic PHP version selector based on composer.json for Gentoo

php

#!/bin/sh

if [[ -f .php-version ]]
then
    PHP_VERSION=$(<.php-version)
else
    PHP_VERSION=''
    if [[ -f composer.json ]]
    then
        PHP_VERSION=$(cat composer.json | egrep -o '"php"\s*:\s*"[^0-9]*[7-8]\.[0-9]+' | egrep -o '[5-8]\.[0-9]+')
    else
        PHP_VERSION='8.2'

        CURRENT_GIT_BRANCH=$(git branch --show-current 2> /dev/null)

        if [[ $CURRENT_GIT_BRANCH =~ "5.0" || $CURRENT_GIT_BRANCH =~ "_50" ]]
        then
            PHP_VERSION='8.1'
        fi

        if [[ $CURRENT_GIT_BRANCH =~ "4.2" || $CURRENT_GIT_BRANCH =~ "_42" || $CURRENT_GIT_BRANCH =~ "4.1" || $CURRENT_GIT_BRANCH =~ "_41" || $CURRENT_GIT_BRANCH =~ "3.1" || $CURRENT_GIT_BRANCH =~ "_31" || $CURRENT_GIT_BRANCH =~ "2.6" ]]
        then
            PHP_VERSION='7.4'
        fi
    fi
fi

PHP="/usr/bin/php${PHP_VERSION}"
${PHP} $@