docker-magento/compose/bin/magento-version

#!/usr/bin/env bash

# Method 1: Using bin/magento --version
version=$(bin/magento --version --no-ansi 2> /dev/null | cut -d" " -f 3)

if [[ -z "$version" ]]; then
    # Method 2: Using grep in composer.lock
    version=$(grep -A 1 "magento/magento2-base" ./src/composer.lock | grep "version" | awk -F "\"" '{print $4}')
fi

if [[ -z "$version" ]]; then
    # Method 3: Using bin/yq in composer.json
    version=$(bin/yq -oj '.version' ./src/composer.json | sed 's/"//g')
fi

# If version is still not obtained, output error message
if [[ -z "$version" ]]; then
    echo "Failed to retrieve Magento version."
else
    echo "$version"
fi