Partially Stage and Commit Changes in Git

Did you know you can partially stage and commit your changes in git?

Suppose you have file numbers.txt checked into your git repo with the following content:

1
2
3
4
5
6
7
8
9
10

Modify numbers.txt to look like this:

1 is for one.
2
3
4
5
6
7
8
9
10 is for ten.

Use git add -p to interactively decide which chunks of the modified file to commit.

Hit n to bypass the first chunk.

diff --git a/numbers.txt b/numbers.txt
index f00c965..32b6ae7 100644
--- a/numbers.txt
+++ b/numbers.txt
@@ -1,4 +1,4 @@
-1
+1 is for one.
 2
 3
 4
Stage this hunk [y,n,q,a,d,j,J,g,/,e,?]? n

Hit y to stage the second chunk.

@@ -7,4 +7,4 @@
 7
 8
 9
-10
+10 is for ten.
Stage this hunk [y,n,q,a,d,K,g,/,e,?]? y

Now commit as normal.

$ git commit -m "Modify the 10th line"

You still have the changes to line 1 in your workspace but now your modification of line 10 is committed to the repo.