git post-merge hook : update / install composer packages & composer itself

post-receive

#!/bin/bash

# thanks http://www.jenssegers.be/blog/46/deploying-websites-with-git-and-composer-

# replace folder
cd "`dirname $0`/../../application/config"

# Check if a composer.json file is present
if [ -f composer.json ]; then

    # Detect composer binary
    if which composer >/dev/null; then
        composer='composer'
    elif which composer.phar >/dev/null; then
        composer='composer.phar'
    else
        # Install composer
        curl -s http://getcomposer.org/installer | php >/dev/null
        composer='php composer.phar'
    fi

    # Run composer if composer.json is updated
    if [ ! -e composer.lock ] || [ composer.json -nt composer.lock ]; then

        # Install or update depending on lock file
        echo "Updating Composer packages"
        [ ! -f composer.lock ] && $composer install || $composer update

    else

        # Regenerating autoload files
        echo "Composer packages up to date"
        $composer dump-autoload

    fi
fi