Submodule status and sync in Git - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the command git submodule status show?

It shows the current commit checked out in each submodule and whether it is up to date with the main repository.

beginner

How do you update all submodules to match the commits recorded in the main repository?

Use git submodule update --init --recursive to initialize and update all submodules recursively.

intermediate

What is the purpose of git submodule sync?

It updates the URLs of submodules in the local configuration to match the main repository's configuration.

intermediate

Why might you need to run git submodule sync after changing the submodule URL?

Because the local .git/config may still have the old URL, so syncing updates it to the new URL from the main repository.

intermediate

What does the --recursive option do when used with submodule commands?

It applies the command to all nested submodules inside submodules, ensuring full update or sync.

Which command shows the current commit checked out in each submodule?

A git submodule init

B git submodule sync

C git submodule update

D git submodule status

The command git submodule status displays the commit each submodule is currently on.

What does git submodule update --init --recursive do?

A Initializes and updates all submodules and nested submodules

B Only initializes submodules without updating

C Syncs submodule URLs with the main repository

D Removes all submodules

This command initializes and updates all submodules, including nested ones.

When should you run git submodule sync?

A After changing submodule URLs in the main repository

B Before cloning a repository

C To commit changes in submodules

D To delete submodules

Sync updates local submodule URLs to match changes made in the main repository.

What happens if you don't run git submodule sync after changing a submodule URL?

A Submodules get deleted automatically

B Your local submodule URL remains outdated

C Submodules update to the new URL anyway

D Git throws an error on every command

Without syncing, the local config keeps the old URL, causing potential fetch errors.

Which option ensures commands apply to nested submodules as well?

A --all

B --force

C --recursive

D --init

The --recursive option makes commands affect all nested submodules.

Explain how to check the status of submodules and update them to the correct commit.

Think about commands that show current state and commands that bring submodules up to date.

Describe why and how you would use git submodule sync in your workflow.

Consider what happens when submodule URLs change in the main repo.