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.