Add delete snippets

snippets/delete-branch.md

@@ -5,7 +5,7 @@ tags: repository,branch,beginner
 
 Deletes a local branch.
 
-- Use `git branch -d <branch>` to delete the branch with the specified branch name.
+- Use `git branch -d <branch>` to delete the specified local `<branch>`.
 
 ```sh
 git branch -d <branch>

snippets/delete-detached-branches.md

@@ -0,0 +1,28 @@
+---
+title: Delete detached branches
+tags: repository,branch,intermediate
+---
+
+Deletes all detached branches.
+
+- Use `git fetch --all --prune` to garbage collect any detached branches.
+- This is especially useful if the remote repository is set to automatically delete merged branches.
+
+```sh
+git fetch --all --prune
+```
+
+```sh
+git checkout master
+git branch
+# master
+# patch-1
+# patch-2
+
+# Assuming `patch-1` is detached
+git fetch --all --prune
+
+git branch
+# master
+# patch-2
+```

snippets/delete-merged-branches.md

@@ -0,0 +1,29 @@
+---
+title: Delete merged branches
+tags: repository,branch,advanced
+---
+
+Deletes all local merged branches.
+
+- Use `git branch --merged <branch>` to list all branches merged into `<branch>`.
+- Use the pipe operator (`|`) to pipe the output and `grep -v "(^\*|<branch>)"` to exclude the current and the target `<branch>`.
+- Use the pipe operator (`|`) to pipe the output and `xargs git branch -d` to delete all of the found branches.
+
+```sh
+git branch --merged <branch> | grep -v "(^\*|<branch>)" | xargs git branch -d
+```
+
+```sh
+git checkout master
+git branch
+# master
+# patch-1
+# patch-2
+
+# Assuming `patch-1` is merged into master
+git branch --merged master | grep -v "(^\*|master)" | xargs git branch -d
+
+git branch
+# master
+# patch-2
+```

snippets/delete-remote-branch.md

@@ -0,0 +1,17 @@
+---
+title: Delete a remote branch
+tags: repository,branch,intermediate
+---
+
+Deletes a remote branch.
+
+- Use `git push -d <remote> <branch>` to delete the specified remote `<branch>` on the given `<remote>`.
+
+```sh
+git push -d <remote> <branch>
+```
+
+```sh
+git checkout master
+git push -d origin patch-1 # Deletes the `patch-1` remote branch
+```