How files move between three areas in Git - Visual Walkthrough

Process Flow - How files move between three areas

Working Directory

↓

Staging Area (Index)

↓

Local Repository

↓

Remote Repository

Files start in the working directory, then move to the staging area with 'git add', then to the local repository with 'git commit', and finally to the remote repository with 'git push'.

Execution Sample

Git

echo 'Hello' > file.txt
 git add file.txt
 git commit -m 'Add file'
 git push origin main

This sequence creates a file, stages it, commits it to local repo, and pushes it to remote.

Process Table

Step	Command	Area Affected	State Change	Result
1	echo 'Hello' > file.txt	Working Directory	file.txt created with content 'Hello'	file.txt exists locally but untracked
2	git add file.txt	Staging Area	file.txt added to staging area	file.txt ready to commit
3	git commit -m 'Add file'	Local Repository	staged file committed	commit created with file.txt content
4	git push origin main	Remote Repository	commit sent to remote	remote repo updated with commit
5	End	-	-	All changes moved from working directory to remote repository

💡 All files moved through working directory -> staging -> local repo -> remote repo

Status Tracker

Area	Start	After Step 1	After Step 2	After Step 3	After Step 4
Working Directory	empty	file.txt created	file.txt unchanged	file.txt unchanged	file.txt unchanged
Staging Area	empty	empty	file.txt staged	empty (after commit)	empty
Local Repository	empty	empty	empty	commit with file.txt	commit with file.txt
Remote Repository	empty	empty	empty	empty	commit with file.txt

Key Moments - 3 Insights

Why does the file still exist in the working directory after 'git add'?

Because 'git add' copies the file to the staging area but does not remove it from the working directory. See execution_table step 2.

What happens to the staging area after 'git commit'?

The staging area is cleared after commit because the changes are saved in the local repository. See execution_table step 3.

Does 'git push' change the local repository?

No, 'git push' sends commits from the local repository to the remote repository without changing the local repo. See execution_table step 4.

Visual Quiz - 3 Questions

Look at the execution table, after which step is the file first added to the staging area?

A Step 1

B Step 3

C Step 2

D Step 4

💡 Hint

Check the 'Area Affected' and 'State Change' columns in step 2.

At which step does the local repository get updated with the new commit?

A Step 3

B Step 2

C Step 1

D Step 4

💡 Hint

Look for 'Local Repository' in the 'Area Affected' column.

If you skip 'git add' and run 'git commit' directly, what would happen?

A The file is committed anyway

B Nothing is committed because staging area is empty

C The file is pushed to remote

D The file is deleted from working directory

💡 Hint

Recall that 'git commit' only commits staged files (see execution_table step 2 and 3).

Concept Snapshot

Git moves files through three main areas:
1. Working Directory: where files are created or changed.
2. Staging Area: files added here with 'git add' to prepare for commit.
3. Local Repository: files saved permanently with 'git commit'.
Finally, 'git push' sends commits to the remote repository.

Full Transcript

In Git, files start in the working directory where you create or edit them. When you run 'git add', the files move to the staging area, which is like a waiting room for changes. Next, 'git commit' saves these staged files into the local repository as a snapshot. Finally, 'git push' sends these commits to the remote repository, sharing your changes with others. This flow helps you control what changes are saved and shared step-by-step.

Practice

1. Which command moves files from the working directory to the staging area in Git?

easy

A. git add

B. git commit

C. git push

D. git clone

Solution

1. Step 1: Understand the role of git add

   The git add command moves files from the working directory to the staging area, preparing them for commit.

2. Step 2: Differentiate from other commands

   git commit saves staged files to the local repository, git push sends commits to a remote, and git clone copies a repository.

3. Final Answer:

   git add -> Option A

4. Quick Check:

   Staging area update = git add [OK]

Hint: Add files to staging with git add [OK]

Common Mistakes:

• Confusing git add with git commit
• Thinking git push moves files locally
• Using git clone to stage files

2. Which of these commands correctly saves staged files to the local repository?

easy

A. git commit -m "Save changes"

B. git status

C. git add .

D. git init

Solution

1. Step 1: Identify the commit command

   git commit -m "message" saves the staged files into the local repository with a message.

2. Step 2: Understand other commands

   git add . stages files, git status shows status, and git init creates a new repo.

3. Final Answer:

   git commit -m "Save changes" -> Option A

4. Quick Check:

   Save staged files = git commit [OK]

Hint: Commit staged files with git commit -m [OK]

Common Mistakes:

• Using git add instead of git commit to save
• Confusing git status with commit
• Trying to commit without staging files

3. Given these commands run in order:

echo "Hello" > file.txt
git add file.txt
git commit -m "Add file"

Where is file.txt after these commands?

medium

A. Only in the working directory

B. In the local repository and working directory

C. Deleted from all areas

D. In the staging area only

Solution

1. Step 1: Create and stage the file

   The file is created in the working directory, then moved to the staging area by git add.

2. Step 2: Commit the file

   git commit saves the staged file to the local repository. The file remains in the working directory.

3. Final Answer:

   In the local repository and working directory -> Option B

4. Quick Check:

   Commit saves staged files, working files remain [OK]

Hint: Committed files stay in repo and working directory [OK]

Common Mistakes:

• Thinking commit removes file from working directory
• Believing staged files disappear after commit
• Confusing staging area with repository

4. You ran git commit -m "Update" but Git says "nothing to commit". What is the likely cause?

medium

A. You committed files but did not push

B. You are in the wrong directory

C. You forgot to stage files with git add

D. You need to run git init again

Solution

1. Step 1: Understand the message meaning

   "Nothing to commit" means no changes are staged for commit.

2. Step 2: Identify missing staging step

   If you forgot git add, no files are staged, so commit has nothing to save.

3. Final Answer:

   You forgot to stage files with git add -> Option C

4. Quick Check:

   Stage files before commit = git add [OK]

Hint: Stage files first with git add before commit [OK]

Common Mistakes:

• Thinking commit auto-stages files
• Confusing push with commit
• Assuming git init fixes this error

5. You edited app.js in your working directory. You want to save only this file to the local repository without including other changes. Which sequence of commands correctly moves app.js through Git's three areas?

hard

A. git add . then git commit -m "Save app.js"

B. git commit -m "Save app.js" then git add app.js

C. git push then git add app.js

D. git add app.js then git commit -m "Save app.js"

Solution

1. Step 1: Stage the specific file

   Use git add app.js to move only app.js to the staging area.

2. Step 2: Commit the staged file

   Run git commit -m "Save app.js" to save the staged changes to the local repository.

3. Final Answer:

   git add app.js then git commit -m "Save app.js" -> Option D

4. Quick Check:

   Stage then commit specific file = git add + git commit [OK]

Hint: Add specific file before commit to save only it [OK]

Common Mistakes:

• Committing before adding files
• Using git push instead of commit
• Adding all files instead of just one