composer-install

#!/usr/bin/env bash

#---------------------------------------------------------------------
usage ()
{
	cat <<EOT

${0##*/}
    Provides a wrapper around \`composer install\` that takes into
    account the availability of the composer executable, as well as
    the presence or absence of a composer.json file. Can be safely
    called even if these items are missing (with the result being
    essentially a no-op and >0 exit code.)

    There is a certain amount of irony in this script being
    included in a composer package, since you would have had to
    already run 'composer install' in order to have access to this
    convenience script. If nothing else, this script exists here
    as a copy/paste reference of how to achieve a certain amount
    of gracefulness in running a tool that may or may not be
    present.

Usage:
    bin/${0##*/}


EOT

	exit ${1:-0}  # Exit with code 0 unless an arg is passed to the method.
}
if [ "$1" = '-h' ]; then
	usage
fi


# Set up working vars.
COMPOSER_CONFIG_FILE="composer.json"
GUESSES=( "$( which composer )" "bin/composer" "$( which composer.phar )" "bin/composer.phar" )


# Bail out if there's no config file present.
if [ ! -e "$COMPOSER_CONFIG_FILE" ]; then
	echo "!! No composer config file at '$COMPOSER_CONFIG_FILE'."
	exit 2
fi
echo "## Found composer config at: ${COMPOSER_CONFIG_FILE}"


# Bail out if composer isn't available to us.
for GUESS in "$GUESSES"; do
	if [ -x "$GUESS" ]; then
		COMPOSER="$GUESS"
		break
	fi
done
if [ -z "$COMPOSER" ]; then
	echo "!! The 'composer' command was not found on this system."
	echo ""
	exit 1
fi
echo "## Found composer at: ${COMPOSER}"


# Execute `composer install`
"$COMPOSER" install --no-interaction --ignore-platform-reqs --optimize-autoloader "$@"