new chapter about building, deployment and CI

_posts/09-05-01-Building your Application.md

@@ -0,0 +1,95 @@
+---
+isChild: true
+---
+
+## Building and Deploying your Application {#build_title}
+
+If you find yourself doing manual database schema changes or running your tests manually before updating your files (manually), think twice! With every additional manual task needed to deploy a new version of your app, the chances for potentially fatal mistakes increase. Whether you're dealing with a simple update, a comprehensive build process or even a continuous integration strategy, build tools are your friend.
+
+### Control your deployment with Phing
+
+With [Phing](http://www.phing.info/) you can control your packaging, deployment or testing process from within a simple XML build file. Phing provides a rich set of tasks usually needed to install or update a web app and can be extended with additional custom tasks (written in PHP).
+
+Example of a Phing script (build.xml):
+
+{% highlight xml %}
+
+    <?xml version="1.0" encoding="UTF-8"?>
+    <project name="my-project" default="update">
+        <!-- Prompt for environment and load respective buld properties. -->
+        <propertyprompt propertyName="environment" defaultValue="development"
+                        promptText="What's the target environment (development, staging, production)?" useExistingValue="true" />
+    
+        <property file="build/properties/${environment}.properties" />
+        
+        <!-- snip -->
+    
+        <target name="update">
+            <phingcall target="svn-update" />
+            <phingcall target="update-dependencies" />
+            <phingcall target="make-configuration" />
+            <phingcall target="migrate-database" />
+        </target>
+    
+        <target name="svn-update">
+            <trycatch property="error">
+                <try>
+                    <svnupdate todir="." />
+                </try>
+                <catch>
+                    <echo message="Svn update failed: ${error}" />
+                </catch>
+            </trycatch>
+        </target>
+    
+        <target name="update-dependencies">
+            <exec command="php composer.phar self-update" />
+            <exec command="php composer.phar update" />
+        </target>
+        
+        <!-- snip -->
+    
+    </project>
+
+{% endhighlight %}
+
+### Continuous Integration
+
+> Continuous Integration is a software development practice where members of a team integrate their work frequently, usually each person integrates at least daily — leading to multiple integrations per day. Many teams find that this approach leads to significantly reduced integration problems and allows a team to develop cohesive software more rapidly.
+
+*Martin Fowler*
+
+There are different ways to implement continuous integration for PHP. Recently [Travis CI](https://travis-ci.org/) has become by far the easiest way to do CI. Travis CI is a hosted continuous integration service for the open source community. It is integrated with GitHub and offers first class support for many languages including PHP. 
+
+Example of a Travis CI build script:
+
+{% highlight yml %}
+
+    language: php
+    
+    # list any PHP version you want to test against
+    php:
+      # aliased to a recent 5.3.x version
+      - 5.3
+      # aliased to a recent 5.4.x version
+      - 5.4
+    
+    # optionally specify a list of environments, for example to test different RDBMS
+    env:
+      - DB=mysql
+      - DB=pgsql
+    
+    # execute any number of scripts before the test run, custom env's are available as variables
+    before_script:
+      - if [[ "$DB" == "pgsql" ]]; then psql -c "DROP DATABASE IF EXISTS hello_world_test;" -U postgres; fi
+      - if [[ "$DB" == "pgsql" ]]; then psql -c "create database hello_world_test;" -U postgres; fi
+      - if [[ "$DB" == "mysql" ]]; then mysql -e "create database IF NOT EXISTS hello_world_test;" -uroot; fi
+    
+    script: phpunit --configuration phpunit_$DB.xml --coverage-text
+
+{% endhighlight %}
+
+Further reading:
+
+* [Continuous Integration with Jenkins](http://jenkins-ci.org/)
+* [Continuous Integration with Teamcity](http://www.jetbrains.com/teamcity/)