Update cheatsheets

git-subtree

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# git subtree
+
+> Manage project dependencies as subprojects.
+> More information: <https://manpages.debian.org/latest/git-man/git-subtree.1.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}}`