This script install some developer tools for Magento 1

m1-dev-tools.sh

#!/bin/bash

###
# @license http://www.apache.org/licenses/LICENSE-2.0 Apache License, Version 2.0
# @author Mehdi Chaouch <[email protected]> <@advocodo>
# @copyright Copyright (c) 2019 ADVOCODO (https://www.advocodo.com)
# @description This script install some developer tools for Magento 1
# @usage ./m1-dev-tools.sh
###

#set -v
#set -x

START=`date +%s`
CURRENT_DATE=`date +%Y%m%d-%H%M%S`
CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROGNAME=`basename $0`


# composer.phar
curl -SsO "https://getcomposer.org/download/1.9.0/composer.phar" && printf "🍺  Downloaded composer.phar successfully\n" || (printf "⚠️  Error downloading composer.phar\n" && exit 1)
chmod +x ./composer.phar && printf "🍺  Changed composer.phar permissions successfully\n" || (printf "⚠️  Error changing composer.phar permissions\n" && exit 1)
mv ./composer.phar /usr/bin/composer && printf "🍺  Moved composer.phar successfully\n" || (printf "⚠️  Error moving composer.phar\n" && exit 1)


# n98-magerun.phar
curl -SsO "https://files.magerun.net/n98-magerun.phar" && printf "🍺  Downloaded n98-magerun.phar successfully\n" || (printf "⚠️  Error downloading n98-magerun.phar\n" && exit 1)
chmod +x ./n98-magerun.phar && printf "🍺  Changed n98-magerun.phar permissions successfully\n" || (printf "⚠️  Error changing n98-magerun.phar permissions\n" && exit 1)
mv ./n98-magerun.phar /usr/bin/n98-magerun && printf "🍺  Moved n98-magerun.phar successfully\n" || (printf "⚠️  Error moving n98-magerun.phar\n" && exit 1)


# jacquesbh/installer
mkdir -p cd /usr/local/src/ && cd /usr/local/src/ && curl -LkSsO "https://github.com/jacquesbh/installer/archive/master.zip" && printf "🍺  Downloaded installer successfully\n" || (printf "⚠️  Error downloading installer\n" && exit 1)
unzip -oq master.zip && rm master.zip && printf "🍺  Unziped installer successfully\n" || (printf "⚠️  Error unzipping installer\n" && exit 1)
ln -sfn /usr/local/src/installer-master/bin/Installer /usr/local/bin/installer && printf "🍺  Created installer symblink successfully\n" || (printf "⚠️  Error creating installer symblink\n" && exit 1)


# adminer
cd $CURRENT_DIR && curl -so adminer.php -L "http://www.adminer.org/latest.php" && printf "🍺  Downloaded Adminer successfully\n" || (printf "⚠️  Error downloading Adminer\n" && exit 1)


# madalinoprea/magneto-debug
curl -LkSsO "https://github.com/madalinoprea/magneto-debug/archive/master.zip" && printf "🍺  Downloaded Magento Developer Toolbar successfully\n" || (printf "⚠️  Error downloading Magento Developer Toolbar\n" && exit 1)
unzip -oq master.zip && rm master.zip && printf "🍺  Unziped Magento Developer Toolbar successfully\n" || (printf "⚠️  Error unzipping Magento Developer Toolbar\n" && exit 1)
mkdir -p app/code/community/Sheep/Debug skin/frontend/base/default/sheep_debug app/design/adminhtml/default/default/template/sheep_debug skin/adminhtml/default/default/sheep_debug
cp -a ./magneto-debug-master/Sheep_Debug.xml app/etc/modules/Sheep_Debug.xml
cp -a ./magneto-debug-master/code/Debug/* app/code/community/Sheep/Debug
cp -a ./magneto-debug-master/design/layout/sheep_debug.xml app/design/frontend/base/default/layout/sheep_debug.xml
cp -a ./magneto-debug-master/design/template/sheep_debug app/design/frontend/base/default/template/sheep_debug
cp -a ./magneto-debug-master/skin/*  skin/frontend/base/default/sheep_debug/
cp -a ./magneto-debug-master/design/layout/sheep_debug.xml app/design/adminhtml/default/default/layout/sheep_debug.xml
cp -a ./magneto-debug-master/design/template/sheep_debug/* app/design/adminhtml/default/default/template/sheep_debug
cp -a ./magneto-debug-master/skin/*  skin/adminhtml/default/default/sheep_debug/
rm -rf ./magneto-debug-master

# Ask to continue
#read -p "Delete $0? (y/n)" -n 1 -r
#echo    # (optional) move to a new line
if [[ $REPLY =~ ^[Yy]$ ]]; then
  cd $CURRENT_DIR && rm ./m1-dev-tools.sh
fi

echo "🏁  Dev tools install done."

I'll better use this "official" way for to everytime get the latest composer package : https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md