Commit only part of a file in Git

Question

When I make changes to a file in Git, how can I commit only some of the changes?

For example, how could I commit only 15 lines out of 30 lines that have been changed

Answer 1

If it's on Windows platform, in my opinion git gui is very good tool to stage/commit few lines from unstaged file

1. Hunk wise:

• Select the file from unstagged Changes section
• Right click chunk of code which needs to be staged
• Select Stage Hunk for commit

2. Line wise:

• Select the file from unstagged Changes section
• Select the line/lines to be staged
• Right click and select Stage Lines for commit

3. If you want to stage the complete file except couple of lines:

• Select the file from unstagged Changes section
• Press Ctrl+T (Stage file to commit)
• Selected file now moves to Staged Changes Section
• Select the line/lines be staged
• Right click and select UnStage Lines for commit