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Command Line: Colcon

My Aliases

I hate typing - so these are the aliases in my ~/.bashrc for my most common workflow:

alias build2="colcon build --symlink-install"
alias test2="colcon test --event-handlers console_direct+"

Build

colcon is used to build ROS 2 packages in a workspace.

Build all packages:

colcon build

To avoid having to rebuild when tweaking Python scripts, config files, and launch files:

colcon build --symlink-install

To fix most build issues, especially if you have added or removed packages to your workspace or installed new RMW implementations, clean the CMake cache. See this ROS Answers post for more details.

colcon build --cmake-clean-cache

CMake Arguments

colcon build --cmake-args -DCMAKE_BUILD_TYPE=RelWithDebInfo

Test

To test and get results to screen:

colcon test
colcon test-result --verbose

Build/test a single package:

colcon <verb> --packages-select <package-name>

Formatting

Get the output to the screen:

colcon <verb> --event-handlers console_direct+

Be Careful With Workspaces

You should probably build your workspace in a window where you have NOT sourced the setup.bash of that workspace. For more details on why, see this ticket.

Verb Documentation