git commit with message - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the command git commit -m "message" do?

It saves your staged changes to the local repository with a short message describing the changes.

beginner

Why is it important to include a message with your git commit?

The message explains what changes were made, helping you and others understand the history of the project.

beginner

How do you write a commit message directly in the command line?

Use git commit -m "Your message here" to add a message without opening an editor.

intermediate

What happens if you run git commit without the -m option?

Git opens a text editor for you to write a detailed commit message before saving the commit.

beginner

Can you commit changes without a message in git?

No, git requires a commit message to describe the changes. You must provide one either with -m or in the editor.

What does the -m option do in git commit -m "message"?

A Merges branches

B Marks the commit as important

C Adds a commit message inline

D Modifies the last commit

The -m option lets you add a commit message directly in the command line.

What happens if you omit the -m option when committing?

A Git opens an editor to write a message

B Git commits with a default message

C Git refuses to commit

D Git deletes staged changes

Without -m, git opens your default text editor to write the commit message.

Why should commit messages be clear and descriptive?

A To confuse other developers

B To speed up git commands

C To make the commit larger

D To explain what changes were made

Clear messages help everyone understand the purpose of the changes.

Which command commits staged changes with the message 'Fix typo'?

A git commit -m Fix typo

B git commit -m "Fix typo"

C git commit Fix typo

D git commit --message Fix typo

The message must be inside quotes after the -m option.

Can you commit changes without staging them first?

A No, you must stage changes before committing

B Yes, git commits all changes automatically

C Yes, if you use <code>-m</code>

D No, commits are only for new files

You need to stage changes with git add before committing.

Explain the purpose and usage of the git commit -m command.

Think about how you save your work with a note explaining what you did.

Describe what happens if you run git commit without the -m option and why you might want to do that.

Imagine writing a letter instead of a short note.

Practice

1. What does the command git commit -m "Update README" do?

easy

A. Saves your changes with the message 'Update README'.

B. Deletes the README file from the repository.

C. Shows the commit history with the message 'Update README'.

D. Creates a new branch named 'Update README'.

Solution

1. Step 1: Understand the git commit command

   The git commit command saves changes to the local repository.

2. Step 2: Understand the -m option

   The -m option adds a message describing the changes.

3. Final Answer:

   Saves your changes with the message 'Update README'. -> Option A

4. Quick Check:

   git commit -m "message" saves changes with message [OK]

Hint: Remember: -m adds your commit message directly [OK]

Common Mistakes:

• Thinking commit deletes files
• Confusing commit with branch creation
• Assuming commit shows history

2. Which of the following is the correct syntax to commit changes with a message in git?

easy

A. git commit -message "Fix bug"

B. git commit --msg "Fix bug"

C. git commit -m "Fix bug"

D. git commit message "Fix bug"

Solution

1. Step 1: Recall the correct flag for commit message

   The correct flag to add a message is -m.

2. Step 2: Check each option's syntax

   Only git commit -m "Fix bug" uses the correct flag and syntax.

3. Final Answer:

   git commit -m "Fix bug" -> Option C

4. Quick Check:

   Use -m for commit message [OK]

Hint: Use -m followed by quotes for commit messages [OK]

Common Mistakes:

• Using -message instead of -m
• Omitting quotes around the message
• Using --msg which is invalid

3. What will be the output of the following commands?

git add file.txt
git commit -m "Add file.txt"

medium

A. Error: No files added to commit.

B. A new branch named 'Add file.txt' is created.

C. file.txt is deleted from the repository.

D. Changes in file.txt are saved with message 'Add file.txt'.

Solution

1. Step 1: Understand git add

   The git add file.txt command stages the file for commit.

2. Step 2: Understand git commit with message

   The git commit -m "Add file.txt" saves the staged changes with the message.

3. Final Answer:

   Changes in file.txt are saved with message 'Add file.txt'. -> Option D

4. Quick Check:

   git add + git commit -m saves changes [OK]

Hint: Add files before commit to save changes [OK]

Common Mistakes:

• Committing without adding files first
• Expecting commit to delete files
• Confusing commit with branch creation

4. You run git commit -m Fix typo but get an error. What is the problem?

medium

A. The commit message must be in quotes.

B. The -m flag is missing.

C. You need to add files before committing.

D. The message 'Fix typo' is too short.

Solution

1. Step 1: Check the commit message syntax

   Commit messages with spaces must be enclosed in quotes.

2. Step 2: Identify the error cause

   Without quotes, git treats 'Fix' as the message and 'typo' as an invalid argument.

3. Final Answer:

   The commit message must be in quotes. -> Option A

4. Quick Check:

   Use quotes around multi-word messages [OK]

Hint: Always quote multi-word commit messages [OK]

Common Mistakes:

• Omitting quotes around messages with spaces
• Forgetting to stage files before commit
• Assuming message length causes errors

5. You want to commit multiple changes with clear messages for each step. Which practice is best?

hard

A. Commit all changes at once with a single message.

B. Commit often with small changes and clear messages using git commit -m.

C. Avoid commit messages to save time.

D. Use git commit without messages and add them later.

Solution

1. Step 1: Understand commit best practices

   Committing often with small, clear messages helps track changes better.

2. Step 2: Evaluate options

   Commit often with small changes and clear messages using git commit -m encourages clear, frequent commits using git commit -m, which is best practice.

3. Final Answer:

   Commit often with small changes and clear messages using git commit -m. -> Option B

4. Quick Check:

   Frequent commits with messages improve tracking [OK]

Hint: Commit small changes often with clear messages [OK]

Common Mistakes:

• Committing too many changes at once
• Skipping commit messages
• Delaying messages until later