Deleting branches in Git - Step-by-Step Execution

Process Flow - Deleting branches

Start

↓

Check branch exists?

No→Error: branch not found

Yes↓

Check if branch is current branch?

Yes→Error: cannot delete current branch

No↓

Delete branch command

↓

Branch deleted

↓

End

This flow shows the steps git follows when deleting a branch: it checks if the branch exists, ensures it's not the current branch, then deletes it.

Execution Sample

Git

git branch -d feature
# Deletes local branch 'feature' if merged

git branch -D feature
# Force deletes local branch 'feature'

This code deletes a local git branch named 'feature', first safely then forcefully.

Process Table

Step	Action	Condition/Check	Result/Output
1	Check if branch 'feature' exists	Branch exists	Yes, branch found
2	Check if 'feature' is current branch	Is current branch?	No, safe to delete
3	Run 'git branch -d feature'	Is branch merged?	Yes, branch deleted successfully
4	Check if branch 'feature' exists again	Branch exists?	No, branch removed
5	Try deleting non-existent branch	Branch exists?	No, error: branch not found
6	Try deleting current branch	Is current branch?	Yes, error: cannot delete current branch

💡 Branch deleted successfully or error shown if conditions not met

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4
branch_exists	unknown	true	true	false	false
is_current_branch	unknown	unknown	false	false	false
branch_deleted	false	false	false	true	true

Key Moments - 2 Insights

Why can't I delete the branch I'm currently on?

Git prevents deleting the current branch to avoid losing your working context. See execution_table step 6 where deletion fails if branch is current.

What happens if the branch is not merged when using 'git branch -d'?

'git branch -d' refuses to delete unmerged branches to protect work. You must use 'git branch -D' to force delete. This is implied in step 3 where deletion depends on merge status.

Visual Quiz - 3 Questions

Look at the execution table, what is the value of 'branch_exists' after step 4?

A false

B true

C unknown

D error

💡 Hint

Check the 'branch_exists' row in variable_tracker after step 4

At which step does git refuse to delete the branch because it is the current branch?

A Step 3

B Step 4

C Step 6

D Step 1

💡 Hint

Look at execution_table step 6 for the current branch deletion error

If the branch is not merged, which command should you use to delete it?

A git branch -d

B git branch -D

C git delete branch

D git remove branch

💡 Hint

Refer to execution_sample where '-D' forces deletion regardless of merge status

Concept Snapshot

Deleting branches in git:
- Use 'git branch -d branchname' to delete safely (only if merged)
- Use 'git branch -D branchname' to force delete
- Cannot delete current branch
- Check branch exists before deleting
- Errors shown if conditions not met

Full Transcript

This visual execution shows how git deletes branches. First, git checks if the branch exists. If not, it shows an error. Then it checks if the branch is the current one; if yes, deletion is blocked to protect your work. If the branch exists and is not current, git tries to delete it. The safe delete command '-d' only works if the branch is merged. Otherwise, you must use '-D' to force delete. The variable tracker shows branch existence and deletion status step by step. Key moments include understanding why current branches can't be deleted and the difference between safe and force delete commands.

Practice

1. What does the command git branch -d feature do?

easy

A. Deletes the remote branch named 'feature'.

B. Deletes the local branch named 'feature' only if it is fully merged.

C. Force deletes the local branch named 'feature' regardless of merge status.

D. Creates a new branch named 'feature'.

Solution

1. Step 1: Understand the command syntax

   The command git branch -d is used to delete a local branch safely.

2. Step 2: Check the merge condition

   The -d option deletes the branch only if it has been fully merged to avoid losing work.

3. Final Answer:

   Deletes the local branch named 'feature' only if it is fully merged. -> Option B

4. Quick Check:

   git branch -d safely deletes merged branches [OK]

Hint: Use -d to delete merged branches safely [OK]

Common Mistakes:

• Confusing -d with -D which force deletes
• Thinking it deletes remote branches
• Assuming it deletes unmerged branches

2. Which command correctly force deletes a local branch named bugfix?

easy

A. git branch -D bugfix

B. git branch -d bugfix

C. git push origin --delete bugfix

D. git delete branch bugfix

Solution

1. Step 1: Identify force delete option

   The -D option in git branch force deletes a local branch even if unmerged.

2. Step 2: Confirm command correctness

   git branch -D bugfix is the correct syntax to force delete the local branch named 'bugfix'.

3. Final Answer:

   git branch -D bugfix -> Option A

4. Quick Check:

   Force delete local branch = git branch -D [OK]

Hint: Use -D to force delete local branches [OK]

Common Mistakes:

• Using -d which only deletes merged branches
• Trying to delete remote branch with local command
• Typing invalid commands like git delete branch

3. What is the output of the command git push origin --delete release if the remote branch release exists?

medium

A. Deletes the remote branch 'release' and shows confirmation.

B. Deletes the local branch 'release' only.

C. Shows an error because the syntax is incorrect.

D. Creates a new remote branch named 'release'.

Solution

1. Step 1: Understand the command purpose

   git push origin --delete release is used to remove a branch from the remote repository named 'origin'.

2. Step 2: Confirm the effect on remote branch

   If the remote branch 'release' exists, this command deletes it and shows a confirmation message.

3. Final Answer:

   Deletes the remote branch 'release' and shows confirmation. -> Option A

4. Quick Check:

   Remote branch deletion uses git push origin --delete [OK]

Hint: Use git push origin --delete to remove remote branches [OK]

Common Mistakes:

• Thinking it deletes local branches
• Using wrong syntax causing errors
• Assuming it creates branches

4. You run git branch -d feature but get an error saying the branch is not fully merged. What should you do to delete it anyway?

medium

A. Rename the branch before deleting.

B. Use git push origin --delete feature to delete locally.

C. Run git branch -d feature again.

D. Use git branch -D feature to force delete the branch.

Solution

1. Step 1: Understand the error cause

   The error means the branch 'feature' has changes not merged to other branches.

2. Step 2: Use force delete option

   To delete it anyway, use git branch -D feature which forces deletion regardless of merge status.

3. Final Answer:

   Use git branch -D feature to force delete the branch. -> Option D

4. Quick Check:

   Force delete unmerged branch = git branch -D [OK]

Hint: Use -D to force delete unmerged branches [OK]

Common Mistakes:

• Trying to delete remote branch with local command
• Repeating the same command without force
• Renaming branch does not delete it

5. You want to delete a branch named hotfix both locally and remotely. Which sequence of commands is correct?

hard

A. git branch -d hotfix && git push origin --delete hotfix

B. git push origin --delete hotfix && git branch -d hotfix

C. git branch -D hotfix && git push origin --delete hotfix

D. git branch -d hotfix && git branch -D hotfix

Solution

1. Step 1: Delete local branch forcefully

   Use git branch -D hotfix to delete the local branch even if unmerged.

2. Step 2: Delete remote branch

   Use git push origin --delete hotfix to remove the branch from the remote repository.

3. Final Answer:

   git branch -D hotfix && git push origin --delete hotfix -> Option C

4. Quick Check:

   Force delete local then delete remote = git branch -D hotfix && git push origin --delete hotfix [OK]

Hint: Force delete local then delete remote branch [OK]

Common Mistakes:

• Deleting remote before local can cause confusion
• Using -d instead of -D for local unmerged branches
• Trying to delete local branch twice