Set up the package index for WP-CLI

package-setup.sh

#!/usr/bin/env bash

if [ -z "$INSTALL_DIR" ]; then
	INSTALL_DIR=$HOME/.wp-cli
fi

mkdir -p "$INSTALL_DIR"
cd "$INSTALL_DIR"

if [ ! -x composer.phar ]; then
	echo "Installing Composer in $INSTALL_DIR"
	echo "-------------------"
	curl -sS https://getcomposer.org/installer | $WP_CLI_PHP
	if [ $? -gt 0 ]; then
		exit 1
	fi
fi

if [ ! -f composer.json ]; then
	echo "Creating composer.json file in $INSTALL_DIR"
	$COMPOSER init --stability dev --no-interaction
	$COMPOSER config bin-dir bin
	$COMPOSER config vendor-dir vendor
fi

echo "Ensuring the package index is available in composer.json"
$COMPOSER config repositories.wp-cli composer http://wp-cli.org/package-index/

if [ ! -f config.yml ]; then
	echo "Creating config.yml file in $INSTALL_DIR"
	echo "require:\n  - vendor/autoload.php" > config.yml
else
	echo "WARNING: Make sure you have vendor/autoload.php inside config.yml"
fi

echo "Setup completed."

See https://github.com/wp-cli/wp-cli/wiki/Community-Packages#setting-up-the-package-index