.. ifconfig:: smv_current_version != '' and smv_current_version != 'rolling' .. note:: For instructions on maintaining a source checkout of the **latest development version** of ROS 2, refer to `Maintaining a source checkout of ROS 2 Rolling <../../rolling/Installation/Maintaining-a-Source-Checkout.html>`__
If you have installed ROS 2 from source, there may have been changes made to the source code since the time that you checked it out.
To keep your source checkout up to date, you will have to periodically update your ros2.repos
file, download the latest sources, and rebuild your workspace.
Each ROS 2 release includes a ros2.repos
file that contains the list of repositories and their version for that release.
If you wish to checkout the latest code for ROS 2 {DISTRO_TITLE}, you can get the relevant repository list by running:
.. tabs:: .. group-tab:: Linux .. code-block:: bash cd ~/ros2_{DISTRO} mv -i ros2.repos ros2.repos.old wget https://raw.githubusercontent.com/ros2/ros2/{REPOS_FILE_BRANCH}/ros2.repos .. group-tab:: macOS .. code-block:: bash cd ~/ros2_{DISTRO} mv -i ros2.repos ros2.repos.old wget https://raw.githubusercontent.com/ros2/ros2/{REPOS_FILE_BRANCH}/ros2.repos .. group-tab:: Windows .. code-block:: bash # CMD cd \dev\ros2_{DISTRO} curl -sk https://raw.githubusercontent.com/ros2/ros2/{REPOS_FILE_BRANCH}/ros2.repos -o ros2.repos # PowerShell cd \dev\ros2_{DISTRO} curl https://raw.githubusercontent.com/ros2/ros2/{REPOS_FILE_BRANCH}/ros2.repos -o ros2.repos
You will notice that in the ros2.repos file, each repository has a version
associated with it that points to a particular commit hash, tag, or branch name.
It is possible that these versions refer to new tags/branches that your local copy of the repositories will not recognize as they are out-of-date.
Because of this, you should update the repositories that you have already checked out with the following command:
vcs custom --args remote update
You should now be able to download the sources associated with the new repository list with:
.. tabs:: .. group-tab:: Linux .. code-block:: bash vcs import src < ros2.repos vcs pull src .. group-tab:: macOS .. code-block:: bash vcs import src < ros2.repos vcs pull src .. group-tab:: Windows .. code-block:: bash # CMD vcs import src < ros2.repos vcs pull src # PowerShell vcs import --input ros2.repos src vcs pull src
Now that the workspace is up to date with the latest sources, remove your previous install and rebuild your workspace with, for example:
colcon build --symlink-install
During your development you may have deviated from the original state of your workspace from when you imported the repository list. If you wish to know the versions of the set of repositories in your workspace, you can export the information using the following command:
.. tabs:: .. group-tab:: Linux .. code-block:: bash cd ~/ros2_{DISTRO} vcs export src > my_ros2.repos .. group-tab:: macOS .. code-block:: bash cd ~/ros2_{DISTRO} vcs export src > my_ros2.repos .. group-tab:: Windows .. code-block:: bash cd \dev\ros2_{DISTRO} vcs export src > my_ros2.repos
This my_ros2.repos
file can then be shared with others so that they can reproduce the state of the repositories in your workspace.