Continuous Integration of PHP Projects

Continuous Integration of PHP Projects Sebastian Bergmann March 12th 2010

Sebastian Bergmann  Co-Founder and Principal Consultant with thePHP.cc  Pioneer in the field of QA for PHP projects  Creator of PHPUnit  Contributor to PHP

Continuous Integration is about preventing your developers from burning in Integration Hell.

Integration Hell  I've been working on my classes and think they are perfect.  You've been working on yours and I suppose you think they're pretty good, too.  Carl has been working on his, and you know how that goes. This slide contains material by Ron Jeffries

Integration Hell  Now we have to integrate them to build a new system.  Carl's code, as usual, breaks everything.  It looks to me as if you have a few problems, too.  My code is solid, I know that because I worked hard on it. This slide contains material by Ron Jeffries

Integration Hell  What I can't understand is why you think there might be something wrong with my code, and Carl, the idiot, is after both of us.  We're in for a few really unpleasant days.  Maybe next time we shouldn't wait so long to integrate. This slide contains material by Ron Jeffries

Continuous Integration is about improving software quality and reducing project risks.

Continuous Integration 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  Each integration is verified by an automated build (including test) to detect integration errors as quickly as possible  Leads to significantly reduced integration problems and allows a team to develop cohesive software more rapidly This slide contains material by Martin Fowler

Continuous Integration What is the Return on Investment?

The Value of Continuous Integration  Reduce risks  Reduce repetitive processes  Generate deployable software  Enable better project visibility  Establish greater project confidence This slide contains material by Paul M. Duvall

The Value of Continuous Integration Risks Continuous Integration helps to reduce  Late discovery of defects  Regression Testing  Test Coverage  Low-Quality Software  Coding Standard Adherence  Architectural Adherence  Duplicate Code  Lack of deployable software  Lack of project visibility This slide contains material by Paul M. Duvall

Interlude: TestDriven Development Disciplined software development practice that focuses on software design by first writing automated unit tests followed by production code in short, frequent iterations This slide contains material by David S. Janzen

Interlude: TestDriven Development  Affects overall software quality  Beyond just defect density  Ability to detect defects early  Significant improvements in quality  Significant improvements in productivity This slide contains material by David S. Janzen

Interlude: TestDriven Development Software developed [using TDD] is likely to have …  Fewer defects  Fewer statements  Lower computational complexity  Lower coupling between classes  Higher test coverage and volume This slide contains material by David S. Janzen

Continuous Integration Lets focus on the implementation.  Build Automation  CI Solutions for PHP

Continuous Integration Where do we start?

Continuous Integration Where do we start?  Identify repetitive processes  Running tests  Analyzing source code  Packaging  Deployment  Make these processes a non-event

Build Automation Automate {errorprone|recurring|tedious} tasks

Build Automation Available Solutions  Apache Ant  http://ant.apache.org/  GNU Make  http://www.gnu.org/software/make/  Phing (Phing is not GNU Make)  http://phing.info/  Rake (Ruby Make)  http://rake.rubyforge.org/  Shell scripts

Build Automation Apache Ant  Java-based build tool  Kind of like make, without make's wrinkles  Build files are XML-based, calling out a target tree where various tasks get executed

Build Automation Apache Ant <project name="php-object-freezer" default="build" basedir="."> <target name="clean">  <delete dir="build"/>  <mkdir dir="build/api"/> <mkdir dir="build/coverage"/> <mkdir dir="build/logs"/> <mkdir dir="build/pdepend"/>  <echoxml file="build/logs/pmd.xml"> <pmd version="dummy"/> </echoxml> </target>  <target name="update"> <exec dir="${basedir}/source" executable="git"> <arg line="pull"/> </exec> </target>

Build Automation Apache Ant  <target name="phpunit"> <exec dir="${basedir}/source" executable="phpunit" failonerror="true"> <arg line="--log-junit ${basedir}/build/logs/junit.xml --coverage-clover ${basedir}/build/logs/clover.xml --coverage-html ${basedir}/build/coverage Tests" /> </exec> </target>  <target name="parallelTasks"> <parallel> <antcall target="pdepend"/> <antcall target="phpcpd"/> <antcall target="phpcs"/> <antcall target="phpdoc"/> </parallel> </target>  <target name="phpcpd"> <exec dir="${basedir}/source" executable="phpcpd"> <arg line="--log-pmd ${basedir}/build/logs/pmd-cpd.xml Object" /> </exec> </target>

Build Automation Apache Ant  <target name="pdepend"> <exec dir="${basedir}" executable="pdepend"> <arg line="--jdepend-xml=${basedir}/build/logs/jdepend.xml --jdepend-chart=${basedir}/build/pdepend/08-dependencies.svg --overview-pyramid=${basedir}/build/pdepend/09-overview.svg source/Object" /> </exec> </target>  <target name="phpcs"> <exec dir="${basedir}" executable="phpcs"> <arg line="--report=checkstyle --report-file=${basedir}/build/logs/checkstyle.xml --standard=Sebastian source/Object" /> </exec> </target>

Build Automation Apache Ant  <target name="phpdoc"> <exec dir="${basedir}/source/Object" executable="phpdoc"> <arg line="-q -ct type -ue on -tb /usr/share/pear/data/phpUnderControl/data/phpdoc -o HTML:Phpuc:phpuc -t ${basedir}/build/api -d ." /> </exec> </target> <target name="build" depends="clean,update,parallelTasks,phpunit"/> </project>

Build Automation Apache Ant sb@thinkpad php-object-freezer % ant Buildfile: build.xml clean: [delete] Deleting directory /usr/local/cruisecontrol/projects/php-object-freezer/build [mkdir] Created dir: /usr/local/cruisecontrol/projects/php-object-freezer/build/api [mkdir] Created dir: /usr/local/cruisecontrol/projects/php-object-freezer/build/coverage [mkdir] Created dir: /usr/local/cruisecontrol/projects/php-object-freezer/build/logs [mkdir] Created dir: /usr/local/cruisecontrol/projects/php-object-freezer/build/pdepend update: [exec] Already up-to-date. pdepend: [exec] PHP_Depend 0.9.7 by Manuel Pichler [exec] [exec] Parsing source files: [exec] .......... 10 [exec] [exec] Executing Inheritance-Analyzer: [exec] 16 [exec] [exec] Executing NodeCount-Analyzer: [exec] .. 51 [exec] [exec] Executing Coupling-Analyzer: [exec] ... 76 [exec] [exec] Executing Dependency-Analyzer: [exec] .. 58 [exec] [exec] Executing NodeLoc-Analyzer: [exec] ... 61 [exec] [exec] Executing CyclomaticComplexity-Analyzer: [exec] ... 70 [exec] [exec] Generating pdepend log files, this may take a moment. [exec] [exec] Time: 00:01; Memory: 10.00Mb phpcpd: [exec] phpcpd 1.2.2 by Sebastian Bergmann. [exec] [exec] 0.00% duplicated lines out of 1686 total lines of code. phpcs: [exec] Result: 1 phpdoc: phpunit: [exec] PHPUnit 3.4.2 by Sebastian Bergmann. [exec] [exec] ............................................................ 60 / 78 [exec] .................. [exec] [exec] Time: 3 seconds [exec] [exec] OK (78 tests, 166 assertions) [exec] [exec] Writing code coverage data to XML file, this may take a moment. [exec] [exec] Generating code coverage report, this may take a moment. build: BUILD SUCCESSFUL Total time: 9 seconds

Continuous Integration is about feeling the pulse of a project.

Continuous Integration Server A software solution that  automatically fetches new revisions from the version control system  automatically builds and tests the software  keeps software metrics information over time  provides insight into the development progress and code quality throughout the development lifecycle

Continuous Integration Server Available Solutions  CruiseControl  http://cruisecontrol.sf.net/  phpUnderControl  http://phpUnderControl.org/  Hudson  http://hudson-ci.org/  Atlassian Bamboo  http://www.atlassian.com/software/bamboo/  Arbit  http://arbitracker.org/

The End  Slides: http://talks.thePHP.cc/  Web: http://thePHP.cc/ http://sebastian-bergmann.de/  Mail: sebastian@thePHP.cc  Twitter: @s_bergmann

References  Software Architecture Improvement through Test-Driven Development. David S. Janzen, 2006. http://www.acm.org/src/subpages/gf_entries_06/DavidJanzen_src_gf06.pdf

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Continuous Integration of PHP Projects

by Sebastian Bergmann on Mar 12, 2010

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Continuous Integration of PHP Projects — Presentation Transcript