Resolve Dependencies With `rosdep`

Resolve Dependencies With rosdep

A package can declare dependencies on other packages.

Before building cloned source, the official tutorial recommends checking those dependencies with rosdep.

From the workspace root:

cd ~/ros2_ws
rosdep install -i --from-path src --rosdistro jazzy -y

Read the command

• --from-path src tells rosdep where to inspect package declarations;
• --rosdistro jazzy fixes dependency resolution to the target distro;
• -i ignores packages already available from the source path when appropriate;
• -y accepts package-manager prompts.

Success evidence

The source tutorial shows a result such as:

#All required rosdeps installed successfully

Exact output may differ, but you need evidence that dependency resolution completed rather than silently skipping the step.

If rosdep is unavailable

Return to Unit 2 development-tool setup. Do not invent an alternate dependency manager.

Checkpoint

Explain why dependency resolution comes before a long build rather than after it fails.