Stage one file.

Add one changed file to the next commit.

set -euo pipefail
printf 'second\n' >> notes.txt
git add -- notes.txt
git diff --cached --name-only

Expected output EXAMPLE

notes.txt

Details

Requires Git and Bash. Run in a disposable practice repository. The test setup below creates the starting files and commits. Use an explicit path to avoid staging unrelated changes.

✓ Verified

Tested on Ubuntu 24.04.5 LTS · 2026-11-02 18:22:14 UTC · git version 2.43.0 · git 1:2.43.0-1ubuntu7.3

Test inputs, results and environment

The exact published code ran in a dedicated Linux test container with prepared inputs. Snippet process uid 65534 with a read-only root filesystem and temporary working files. Networking disabled. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.

Architecture / host kernel: x86_64 / 6.18.54.1-microsoft-standard-WSL2
Snippet identity / locale: uid=65534, gid=65534 (unprivileged process) / C.UTF-8
Interpreter invocation: bash -euo pipefail -c <published code>
Container image ID: sha256:ec91410a8f6ec3e985830b5e3a0560306d36f8c1c5ccd91a6699abe707123fa3
Code SHA-256: ea56f149f505908bc7e1ed88b7279bbfd34d6b0d2d09608871859a1f456e5ed6
Dependencies: git 1:2.43.0-1ubuntu7.3

Test input setup

These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.

git init -q -b main .
git config user.name 'Example Developer'
git config user.email 'developer@example.invalid'
git config commit.gpgsign false
printf 'first\n' > notes.txt
git add notes.txt
git commit -qm 'Initial notes'

Observed standard output

notes.txt

Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.

# add # stage # index