Gerrit Code Review: Developer Setup

To build a developer instance, you’ll need Bazel to compile the code, preferably launched with Bazelisk.

Getting the Source

Create a new client workspace:

  git clone --recurse-submodules https://gerrit.googlesource.com/gerrit
  cd gerrit

The --recursive option is needed on git clone to ensure that the core plugins, which are included as git submodules, are also cloned.

Compiling

For details, see Building with Bazel.

Configuring Eclipse

To use the Eclipse IDE for development, see Eclipse Setup.

To configure the Eclipse workspace with Bazel, see Eclipse integration with Bazel.

Configuring IntelliJ IDEA

See IntelliJ Setup for details.

MacOS

On MacOS, ensure that "Java for MacOS X 10.5 Update 4" (or higher) is installed and that JAVA_HOME is set to the required Java version.

Java installations can typically be found in "/System/Library/Frameworks/JavaVM.framework/Versions".

To check the installed version of Java, open a terminal window and run:

java -version

Site Initialization

After you compile the project (above), run the Gerrit init command to create a test site:

  $(bazel info output_base)/external/local_jdk/bin/java \
     -jar bazel-bin/gerrit.war init -d ../gerrit_testsite

Note	You must use the same Java version that Bazel used for the build, which is available at `$(bazel info output_base)/external/local_jdk/bin/java`.

During initialization, change two settings from the defaults:

To ensure the development instance is not externally accessible, change the listen addresses from '*' to 'localhost'.
To allow yourself to create and act as arbitrary test accounts on your development instance, change the auth type from 'OPENID' to 'DEVELOPMENT_BECOME_ANY_ACCOUNT'.

After initializing the test site, Gerrit starts serving in the background. A web browser displays the Start page.

On the Start page, you can:

Log in as the account you created during the initialization process.
Register additional accounts.
Create projects.

To shut down the daemon, run:

  ../gerrit_testsite/bin/gerrit.sh stop

Working with the Local Server

To create more accounts on your development instance:

Click 'become' in the upper right corner.
Select 'Switch User'.
Register a new account.

Use the ssh protocol to clone from and push to the local server. For example, to clone a repository that you’ve created through the admin interface, run:

git clone ssh://username@localhost:29418/projectname

To create changes as users of Gerrit would, run:

git push origin HEAD:refs/for/master

Testing

Running the acceptance tests

Gerrit contains acceptance tests that validate the Gerrit daemon via REST, SSH, and the Git protocol.

A new review site is created for each test and the Gerrit daemon is then started on that site. When the test is completed, the Gerrit daemon is shut down.

For instructions on running the acceptance tests with Bazel, see Running Unit Tests with Bazel.

Running the Daemon

The daemon can be launched directly from the build area, without copying to the test site:

  $(bazel info output_base)/external/local_jdk/bin/java \
     -jar bazel-bin/gerrit.war daemon -d ../gerrit_testsite \
     --console-log

Note	To learn why using `java -jar` isn’t sufficient, see this explanation.

To debug the Gerrit server of this test site:

Open a debug port (such as port 5005). To do so, insert the following code immediately after -jar in the previous command. To learn how to attach IntelliJ, see Debugging a remote Gerrit server.

-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

Running the Daemon with Gerrit Inspector

Gerrit Inspector is an interactive scriptable environment you can use to inspect and modify the internal state of the system.

Gerrit Inspector appears on the system console whenever the system starts. Leaving the Inspector shuts down the Gerrit instance.

To troubleshoot, the Inspector enables interactive work as well as running of Python scripts.

To start the Inspector, add the '-s' option to the daemon start command:

  $(bazel info output_base)/external/local_jdk/bin/java \
     -jar bazel-bin/gerrit.war daemon -d ../gerrit_testsite -s

Note	To learn why using `java -jar` isn’t sufficient, see this explanation.

Inspector examines Java libraries, loads the initialization scripts, and starts a command line prompt on the console:

  Welcome to the Gerrit Inspector
  Enter help() to see the above again, EOF to quit and stop Gerrit
  Jython 2.5.2 (Release_2_5_2:7206, Mar 2 2011, 23:12:06)
  [OpenJDK 64-Bit Server VM (Sun Microsystems Inc.)] on java1.6.0 running for
  Gerrit 2.3-rc0-163-g01967ef
  >>>

When the Inspector is enabled, you can use Gerrit as usual and all interfaces (including HTTP and SSH) are available.

Caution

When using the Inspector, be careful not to modify the internal state of the system.

Querying the database

The embedded H2 database can be queried and updated from the command line. If the daemon is not running, run:

  $(bazel info output_base)/external/local_jdk/bin/java \
     -jar bazel-bin/gerrit.war gsql -d ../gerrit_testsite -s

Note	To learn why using `java -jar` isn’t sufficient, see this explanation.

Alternatively, if the daemon is running and the database is in use, use an administrator user account to connect over SSH:

  ssh -p 29418 user@localhost gerrit gsql

Switching between branches

When using git checkout without --recurse-submodules to switch between branches, submodule revisions are not altered, which can result in:

Incorrect or unneeded plugin revisions.
Missing plugins.

After you switch branches, ensure that you have the correct versions of the submodules.

Caution

If you store Eclipse or IntelliJ project files in the Gerrit source directories, do not run git clean -fdx. Doing so may remove untracked files and damage your project. For more information, see git-clean.

Run the following:

  git submodule update
  git clean -ffd

Part of Gerrit Code Review