Salt State Example

gistfile1.yml

{% if grains['os.family'] == 'Arch' %}
composer:
  pkg.installed
{% else %}
get-composer:
  cmd.run:
    - name: 'CURL=`which curl`; $CURL -sS https://getcomposer.org/installer | php'
    - unless: test -f /usr/local/bin/composer
    - cwd: /root/

composer:
  cmd.wait:
    - name: mv /root/composer.phar /usr/local/bin/composer
    - cwd: /root/
    - watch:
      - cmd: get-composer
{% endif %}

gistfile2.yml

/path/to/project:
  composer.installed:
    - no_dev: true
    - require:
      # WHAT GOES HERE:
      - cmd: composer
      # OR
      - pkg: composer