install composer

README.md

install composer

install composer.

see also https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md

install-composer

#!/bin/bash

SCRIPT_DIR=$(cd $(dirname $0); pwd)

if [ -e "${SCRIPT_DIR}/composer" ]
then
    echo "Info: Already Installed composer"
    exit 0
fi

EXPECTED_SIGNATURE=$(wget -q -O - https://composer.github.io/installer.sig)
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'composer-setup.php');")

if [ "$EXPECTED_SIGNATURE" != "$ACTUAL_SIGNATURE" ]
then
    >&2 echo 'ERROR: Invalid installer signature'
    rm composer-setup.php
    exit 1
fi

php composer-setup.php --install-dir $SCRIPT_DIR --filename composer --quiet
RESULT=$?
rm composer-setup.php

if [ "${RESULT}" != "0" ]
then
    >&2 echo 'ERROR: Install failed'
    exit 1
fi

exit $RESULT