git subtree

Tool to manage project dependencies as subprojects. More information: https://manpages.debian.org/testing/git-man/git-subtree.1.en.html.

• Add a Git repository as a subtree:
  git subtree add --prefix={{path/to/directory/}} --squash {{repository_url}} {{branch_name}}
• Update subtree repository to its latest commit:
  git subtree pull --prefix={{path/to/directory/}} {{repository_url}} {{branch_name}}
• Merge recent changes up to the latest subtree commit into the subtree:
  git subtree merge --prefix={{path/to/directory/}} --squash {{repository_url}} {{branch_name}}
• Push commits to a subtree repository:
  git subtree push --prefix={{path/to/directory/}} {{repository_url}} {{branch_name}}
• Extract a new project history from the history of a subtree:
  git subtree split --prefix={{path/to/directory/}} {{repository_url}} -b {{branch_name}}