* Our build system is Jenkins and hosted at https://jenkins.c4science.ch
## Create a new Job
* Create a new Item of type "Freestyle project", give it a name
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* If you want to trigger the build from Herald on a new Diffusion or Commit: choose "This build is parameterized" and add a new String Parameter with the name PHID
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* Select Git as source code management and put the URL of the repository
** If your repository is private, you have to create a new Creadential for it, for instance using an SSH key with your Phabricator username, You'll add the public key to your phabricator profile: https://c4science.ch/settings/panel/ssh/
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* If you want to periodically build the project, select the option under Build triggers and use this syntax `H/30 * * * *` to build every 30 mn. See complete documentation about the syntax by clicking on the question mark on the right of the field
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* To run your unit test, add a Build step, select Execute Shell and provide the command to run your tests
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* You have access to differents build environment, you can choose on by clicking on "Restrict where this project can be run" with the following values
** **ubuntu:trusty** Ubuntu Trusty 14.04.4 LTS x86_64
** **centos:7** Centos 7.2 x86_64
** More to come
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* If you want to trigger the build from Phabricator, under Build Triggers, tick "Trigger builds remotely" and create a token.
** The best would be some random string, you can generate one like this on a linux shell: `head -c 16 /dev/urandom | md5sum`
### Trigger build on commit
* You can trigger a build from Phabricator using Harbormaster and Herald applications, either on commit or on differential
#### Harbormaster (run build)
* Create a Build Plan for your repository, https://c4science.ch/harbormaster/plan/
* You'll have to create a custom policy so yourself can view and edit, as well as the @jenkins user
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* Add a new Build Step of type "Make HTTP Request"
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* Add the following URL, `https://jenkins.c4science.ch/buildByToken/buildWithParameters?PHID=${target.phid}&token=<your token>&job=<your job name>`
* Select "GET" on the //HTTP Method// field
* Select "Wait For Message" on the //When Complete// field.
* Save your step
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#### Herald (Notification and action)
* Go to Herald, https://c4science.ch/herald/
* Create a new Rule on Commits of type Object
* Put the reference of your object, the repository ID (rXX) or callsign
* Give it a name and select the condition as "Repository is any of <your repository>"
* Then select the "Run build plans" action with your newly created Build plan
* Save the rule
* Now when a commit is pushed on your repository, a build will be generated on your Jenkins job and the result will be reported back to phabricator.
* You can access the jenkins job build in the harbormaster build, under artifacts, as shown on this image
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