Magento batch installer + automatic git adding script for testing. As featured here: https://plugin.company/blog/batch-installing-magento-1-4-1-9-custom-module/

Magento batch installer

#!/bin/bash

#user data 
DBUSER=yourusername                                     #add your mysql user name here
DBPASSW=yourpassword                                    #add your mysql password here
URL='http://test.dev/'                                  #your local www-data URL
GITBASEURL='git@gitlab.com:magento-extensions/'         #the 'root' url of your git provider / project group
#end user data

INST=$1
ssh-add;
echo 'magento batch install...';
n98-magerun.phar install --dbHost="localhost" --dbUser="${DBUSER}" --dbPass="${DBPASSW}" --dbName="${INST}14" --installSampleData=yes --useDefaultConfigParams=yes --magentoVersionByName="magento-local-1.4.2.0" --installationFolder="./${INST}14" --baseUrl="${URL}${INST}14/";

n98-magerun.phar install --dbHost="localhost" --dbUser="${DBUSER}" --dbPass="${DBPASSW}" --dbName="${INST}15" --installSampleData=yes --useDefaultConfigParams=yes --magentoVersionByName="magento-local-1.5.1.0" --installationFolder="./${INST}15" --baseUrl="${URL}${INST}15/";

n98-magerun.phar install --dbHost="localhost" --dbUser="${DBUSER}" --dbPass="${DBPASSW}" --dbName="${INST}16" --installSampleData=yes --useDefaultConfigParams=yes --magentoVersionByName="magento-local-1.6.2.0" --installationFolder="./${INST}16" --baseUrl="${URL}${INST}16/";

n98-magerun.phar install --dbHost="localhost" --dbUser="${DBUSER}" --dbPass="${DBPASSW}" --dbName="${INST}17" --installSampleData=yes --useDefaultConfigParams=yes --magentoVersionByName="magento-local-1.7.0.2" --installationFolder="./${INST}17" --baseUrl="${URL}${INST}17/";

n98-magerun.phar install --dbHost="localhost" --dbUser="${DBUSER}" --dbPass="${DBPASSW}" --dbName="${INST}18" --installSampleData=yes --useDefaultConfigParams=yes --magentoVersionByName="magento-local-1.8.1.0" --installationFolder="./${INST}18" --baseUrl="${URL}${INST}18/";

n98-magerun.phar install --dbHost="localhost" --dbUser="${DBUSER}" --dbPass="${DBPASSW}" --dbName="${INST}19" --installSampleData=yes --useDefaultConfigParams=yes --magentoVersionByName="magento-local-1.9.1.0" --installationFolder="./${INST}19" --baseUrl="${URL}${INST}19/";

echo 'magento batch install done.';

if [ -z ${2+x} ]; then echo "no git repo specified, done.";exit 0; 
else 
        echo "adding ${2} to magento 1.4...";
        cd ./${INST}14/
        git init
        git remote add origin ${GITBASEURL}${2}
        git fetch --progress --prune origin
        git checkout -b master origin/master

        echo "adding ${2} to magento 1.5...";
        cd ../${INST}15/
        git init
        git remote add origin ${GITBASEURL}${2}
        git fetch --progress --prune origin
        git checkout -b master origin/master

        echo "adding ${2} to magento 1.6...";
        cd ../${INST}16/
        git init
        git remote add origin ${GITBASEURL}${2}
        git fetch --progress --prune origin
        git checkout -b master origin/master

        echo "adding ${2} to magento 1.7...";
        cd ../${INST}17/
        git init
        git remote add origin ${GITBASEURL}${2}
        git fetch --progress --prune origin
        git checkout -b master origin/master

        echo "adding ${2} to magento 1.8...";
        cd ../${INST}18/
        git init
        git remote add origin ${GITBASEURL}${2}
        git fetch --progress --prune origin
        git checkout -b master origin/master

        echo "adding ${2} to magento 1.9...";
        cd ../${INST}19/
        git init
        git remote add origin ${GITBASEURL}${2}
        git fetch --progress --prune origin
        git checkout -b master origin/master

        cd ../
fi

echo 'running second re-index round...';
pwd
echo "reindexing magento 1.4...";
cd ./${INST}14/
n98-magerun.phar index:reindex:all

pwd
echo "reindexing magento 1.5...";
cd ../${INST}15/
n98-magerun.phar index:reindex:all

pwd
echo "reindexing magento 1.6...";
cd ../${INST}16/
n98-magerun.phar index:reindex:all

pwd
echo "reindexing magento 1.7...";
cd ../${INST}17/
n98-magerun.phar index:reindex:all

pwd
echo "reindexing magento 1.8...";
cd ../${INST}18/
n98-magerun.phar index:reindex:all

pwd
echo "reindexing magento 1.9...";
cd ../${INST}19/
n98-magerun.phar index:reindex:all

cd ../

echo 'done!';

If you have any improvements or ideas for this script, let us know!

N98 Magerun is required, and opionally setting up a local Magento repository for n98 magerun (https://plugin.company/blog/creating-local-magento-repository-n98-magerun/)