title: I'm having trouble with installing Propel, sql:build does not work
body: <p>I am following the official Propel tutorial: <a href="http://propelorm.org/documentation/02-buildtime.html" rel="nofollow">Propel chapter 2: build time</a></p>
  
  <p>But when I execute the vendor/bin/propel sql:build script, nothing happens!</p>
  
  <p>I created a composer.json file and then installed composer, just as explained.
  The files are succesfully downloaded.</p>
  
  <p>I go to my project:
  /media/sf_sandbox/test/temp/propel/bookstore</p>
  
  <p>I used the example for the schema.xml file:</p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;database name="bookstore" defaultIdMethod="native"&gt;
    &lt;table name="book" phpName="Book"&gt;
      &lt;column name="id" type="integer" required="true" primaryKey="true" autoIncrement="true"/&gt;
      &lt;column name="title" type="varchar" size="255" required="true" /&gt;
      &lt;column name="isbn" type="varchar" size="24" required="true" phpName="ISBN"/&gt;
      &lt;column name="publisher_id" type="integer" required="true"/&gt;
      &lt;column name="author_id" type="integer" required="true"/&gt;
      &lt;foreign-key foreignTable="publisher" phpName="Publisher" refPhpName="Book"&gt;
        &lt;reference local="publisher_id" foreign="id"/&gt;
      &lt;/foreign-key&gt;
      &lt;foreign-key foreignTable="author"&gt;
        &lt;reference local="author_id" foreign="id"/&gt;
      &lt;/foreign-key&gt;
    &lt;/table&gt;
    &lt;table name="author" phpName="Author"&gt;
      &lt;column name="id" type="integer" required="true" primaryKey="true" autoIncrement="true"/&gt;
      &lt;column name="first_name" type="varchar" size="128" required="true"/&gt;
      &lt;column name="last_name" type="varchar" size="128" required="true"/&gt;
    &lt;/table&gt;
    &lt;table name="publisher" phpName="Publisher"&gt;
     &lt;column name="id" type="integer" required="true" primaryKey="true" autoIncrement="true" /&gt;
     &lt;column name="name" type="varchar" size="128" required="true" /&gt;
    &lt;/table&gt;
  &lt;/database&gt;
  </code></pre>
  
  <p>I used the propel.php example with my username and password, I kept the rest unchanged:</p>
  
  <pre><code>&lt;?php
  
  return [
      'propel' =&gt; [
          'database' =&gt; [
              'connections' =&gt; [
                  'bookstore' =&gt; [
                      'adapter'    =&gt; 'mysql',
                      'classname'  =&gt; 'Propel\Runtime\Connection\ConnectionWrapper',
                      'dsn'        =&gt; 'mysql:host=localhost;dbname=my_db_name',
                      'user'       =&gt; 'myusername',
                      'password'   =&gt; 'mypassword',
                      'attributes' =&gt; []
                  ]
              ]
          ],
          'runtime' =&gt; [
              'defaultConnection' =&gt; 'bookstore',
              'connections' =&gt; ['bookstore']
          ],
          'generator' =&gt; [
              'defaultConnection' =&gt; 'bookstore',
              'connections' =&gt; ['bookstore']
          ]
      ]
  ];
  </code></pre>
  
  <p>But when I execute this script:
      vendor/bin/propel sql:build</p>
  
  <p>But nothing happens, no new database, no error, it just repeats this line:</p>
  
  <pre><code>/media/sf_sandbox/test/temp/propel/bookstore
  /media/sf_sandbox/test/temp/propel/bookstore
  </code></pre>
  
  <p>The path to my project, I just can't get my head around this...</p>